10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

 Washington, D.C. 20549

FORM 10-K

☒ ANNUALREPORTPURSUANTTO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGEACT OF1934

For the fiscal year ended December 31, 2017

☐ TRANSITIONREPORTPURSUANTTOSECTION13OR15(d)OFTHESECURITIESEXCHANGEACTOF 1934

For the transition period fromto.

Commission file number 001-13695

(Exact name of registrant as specified in its charter)

Delaware	16‑1213679
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

5790 Widewaters Parkway, DeWitt, New York	13214-1883
(Address of principal executive offices)	(Zip Code)

 (315) 445‑2282

(Registrant's telephone number, including area code)

Securities registered pursuant of Section 12(b) of the Act:

Title of each class	Name of each exchange on which registered
Common Stock, Par Value $1.00 per share	New York Stock Exchange

Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.  Yes   ☒     No ☐.

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.  Yes ☐    No ☒.

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.   Yes  ☒    No ☐.

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).   Yes ☒   No ☐.

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§229.405 of this chapter) is not contained herein, and will not be contained, to the best of the registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment of this Form 10-K. ☐.

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company.  See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer  ☒	Accelerated filer ☐	Non-accelerated filer ☐	Smaller reporting company ☐	Emerging growth company ☐
	(Do not check if a smaller reporting company)

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐.

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).  Yes ☐No ☒.

The aggregate market value of the common stock, $1.00 par value per share, held by non-affiliates of the registrant computed by reference to the closing price as of the close of business on June 30, 2017 (the registrant’s most recently completed second fiscal quarter): $2,750,913,268.

The number of shares of the common stock, $1.00 par value per share, outstanding as of the close of business on January 31, 2018: 50,796,090

DOCUMENTS INCORPORATED BY REFERENCE.

Portions of the Definitive Proxy Statement for the Annual Meeting of the Shareholders to be held on May 16, 2018 (the “Proxy Statement”) is incorporated by reference in Part III of this Annual Report on Form 10-K.

TABLE OF CONTENTS

PART I		Page
Item 1	Business	3
Item 1A	Risk Factors	13
Item 1B	Unresolved Staff Comments	19
Item 2	Properties	19
Item 3	Legal Proceedings	19
Item 4	Mine Safety Disclosures	19
Item 4A	Executive Officers of the Registrant	20
PART II
Item 5	Market for the Registrant's Common Equity, Related Stockholders Matters and Issuer Purchases of Equity Securities	21
Item 6	Selected Financial Data	23
Item 7	Management's Discussion and Analysis of Financial Condition and Results of Operations	25
Item 7A	Quantitative and Qualitative Disclosures about Market Risk	55
Item 8	Financial Statements and Supplementary Data:
	Consolidated Statements of Condition	58
	Consolidated Statements of Income	59
	Consolidated Statements of Comprehensive Income	60
	Consolidated Statements of Changes in Shareholders' Equity	61
	Consolidated Statements of Cash Flows	62
	Notes to Consolidated Financial Statements	63
	Report on Internal Control over Financial Reporting	105
	Report of Independent Registered Public Accounting Firm	106
	Two Year Selected Quarterly Data	108
Item 9	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure	108
Item 9A	Controls and Procedures	108
Item 9B	Other Information	109
PART III
Item 10	Directors, Executive Officers and Corporate Governance	109
Item 11	Executive Compensation	109
Item 12	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	109
Item 13	Certain Relationships and Related Transactions, and Director Independence	109
Item 14	Principal Accounting Fees and Services	109
PART IV
Item 15	Exhibits, Financial Statement Schedules	110
Item 16	Form 10-K Summary	114
Signatures		115

2

Part I

This Annual Report on Form 10-K contains certain forward-looking statements with respect to the financial condition, results of operations and business of Community Bank System, Inc.  These forward-looking statements by their nature address matters that involve certain risks and uncertainties.  Factors that may cause actual results to differ materially from those contemplated by such forward-looking statements are set forth herein under the caption “Forward-Looking Statements.”

Item 1. Business

Community Bank System, Inc. (the “Company”) was incorporated on April 15, 1983, under the Delaware General Corporation Law.  Its principal office is located at 5790 Widewaters Parkway, DeWitt, New York 13214.  The Company is a registered financial holding company which wholly-owns two significant subsidiaries: Community Bank, N.A. (the “Bank” or “CBNA”), and Benefit Plans Administrative Services, Inc. (“BPAS”).  As of December 31, 2017, BPAS owns five subsidiaries: Benefit Plans Administrative Services, LLC (“BPA”), a provider of defined contribution plan administration services; Northeast Retirement Services, LLC (“NRS”), a provider of institutional transfer agency, master recordkeeping services, fund administration, trust and retirement plan services; BPAS Actuarial & Pension Services, LLC (“BPAS-APS”), a provider of actuarial and benefit consulting services; BPAS Trust Company of Puerto Rico, a Puerto Rican trust company; and Hand Benefits & Trust Company (“HB&T”), a provider of collective investment fund administration and institutional trust services.  NRS owns one subsidiary, Global Trust Company, Inc. (“GTC”), a non-depository trust company which provides fiduciary services for collective investment trusts and other products.  HB&T owns one subsidiary, Hand Securities, Inc. (“HSI”), an introducing broker-dealer.  The Company also wholly-owns three unconsolidated subsidiary business trusts formed for the purpose of issuing mandatorily-redeemable preferred securities which are considered Tier I capital under regulatory capital adequacy guidelines.

The Bank’s business philosophy is to operate as a diversified financial services enterprise providing a broad array of banking and other financial services to retail, commercial and municipal customers.  As of December 31, 2017, the Bank operates 225 full-service branches operating as Community Bank, N.A. throughout 35 counties of Upstate New York, six counties of Northeastern Pennsylvania, 12 counties of Vermont and one county of Western Massachusetts, offering a range of commercial and retail banking services.  The Bank owns the following operating subsidiaries: The Carta Group, Inc. (“Carta Group”), CBNA Preferred Funding Corporation (“PFC”), CBNA Treasury Management Corporation (“TMC”), Community Investment Services, Inc. (“CISI”), NOTCH Investment Fund, LLC (“NOTCH”), Nottingham Advisors, Inc. (“Nottingham”), OneGroup NY, Inc. (“OneGroup”), and Oneida Preferred Funding II LLC (“OPFC II”).  OneGroup is a full-service insurance agency offering personal and commercial property insurance and other risk management products and services.  NOTCH, PFC and OPFC II primarily act as investors in residential and commercial real estate activities.  TMC provides cash management, investment, and treasury services to the Bank.  CISI and Carta Group provide broker-dealer and investment advisory services.  Nottingham provides asset management services to individuals, corporations, corporate pension and profit sharing plans, and foundations.

The Company maintains a website at communitybankna.com.  Annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and amendments to those reports, are available on the Company’s website free of charge as soon as reasonably practicable after such reports or amendments are electronically filed with or furnished to the Securities and Exchange Commission (“SEC”).  The information posted on the website is not incorporated into or a part of this filing.  Copies of all documents filed with the SEC can also be obtained by visiting the SEC’s Public Reference Room at 100 F Street, NE, Washington, DC  20549, by calling the SEC at 1-800-SEC-0330 or by accessing the SEC’s website at https://www.sec.gov.

Acquisition History (2013-2017)

Gordon B. Roberts Agency, Inc.

On December 4, 2017, the Company, through its subsidiary, OneGroup, completed its acquisition of Gordon B. Roberts Agency, Inc. (“GBR”), an insurance agency headquartered in Oneonta, New York for $3.7 million in Company stock and cash, comprised of $1.35 million in cash and the issuance of 0.04 million shares of common stock.  The transaction resulted in the acquisition of $0.6 million of assets, $0.7 million of other liabilities, goodwill in the amount of $2.2 million and other intangible assets of $1.6 million.

Northeast Capital Management, Inc.

On November 17, 2017, the Company, through its subsidiary, CISI, completed its acquisition of certain assets of Northeast Capital Management, Inc. (“NECM”), a financial services business headquartered in Wilkes Barre, Pennsylvania.  The Company agreed to pay $1.2 million in cash, including a $0.2 million contingent payment based on certain customer retention objectives, to acquire a customer list from NECM, and recorded a $1.2 million customer list intangible asset in conjunction with the acquisition.

3

Merchants Bancshares, Inc.

On May 12, 2017, the Company completed its acquisition of Merchants Bancshares, Inc. (“Merchants”), parent company of Merchants Bank headquartered in South Burlington, Vermont, for $345.2 million in Company stock and cash, comprised of $82.9 million in cash and the issuance of 4.68 million shares of common stock.  The acquisition extends the Company’s footprint into the Vermont and Western Massachusetts markets with the addition of 31 branch locations in Vermont and one location in Massachusetts.  This transaction resulted in the acquisition of $2.0 billion of assets, including $1.49 billion of loans and $370.6 million of investment securities, as well as $1.45 billion of deposits and $189.0 million in goodwill.

Dryfoos Insurance Agency, Inc.

On March 1, 2017, the Company, through its subsidiary, OneGroup, completed its acquisition of certain assets of Dryfoos Insurance Agency, Inc. (“Dryfoos”), an insurance agency headquartered in Hazleton, Pennsylvania.  The Company paid $3.0 million in cash to acquire the assets of Dryfoos, and recorded goodwill in the amount of $1.7 million and other intangible assets of $1.7 million in conjunction with the acquisition.

Northeast Retirement Services, Inc.

On February 3, 2017, the Company completed its acquisition of Northeast Retirement Services, Inc. (“NRS”) and its subsidiary Global Trust Company, Inc. (“GTC”), headquartered in Woburn, Massachusetts, for $148.6 million in Company stock and cash.  NRS was a privately held corporation focused on providing institutional transfer agency, master recordkeeping services, custom target date fund administration, trust product administration and customized reporting services to institutional clients.  Its wholly-owned subsidiary, GTC, is chartered in the State of Maine as a non-depository trust company and provides fiduciary services for collective investment trusts and other products.  The acquisition of NRS and GTC, hereafter referred to collectively as NRS, will strengthen and complement the Company’s existing employee benefit services businesses.  Upon the completion of the merger, NRS became a wholly-owned subsidiary of BPAS and operates as Northeast Retirement Services, LLC, a Delaware limited liability company.  This transaction resulted in the acquisition of $36.1 million in net tangible assets, principally cash and certificates of deposit, $60.2 million in customer list intangibles that will be amortized over 10 years, the creation of a $24.2 million deferred tax liability associated with the customer list intangible and $76.4 million in goodwill.

Benefits Advisory Service, Inc.

On January 1, 2017, the Company, through its subsidiary, OneGroup, acquired certain assets of Benefits Advisory Service, Inc. (“BAS”), a benefits consulting group headquartered in Forest Hills, New York.  The Company paid $1.2 million in cash to acquire the assets of BAS and recorded intangible assets of $1.2 million in conjunction with the acquisition.

WJL Agencies, Inc.

On January 4, 2016, the Company, through its subsidiary, CBNA Insurance Agency, Inc., completed its acquisition of WJL Agencies, Inc. doing business as The Clark Insurance Agencies (“WJL”), an insurance agency operating in Canton, New York. The Company paid $0.6 million in cash for the intangible assets of the company.  Goodwill in the amount of $0.3 million and intangible assets in the amount of $0.3 million were recorded in conjunction with the acquisition.  The effects of the acquired assets and liabilities have been included in the consolidated financial statements since that date.  On August 19, 2016, the Company merged together its insurance subsidiaries and as of that date, CBNA Insurance Agency, Inc. was merged into OneGroup.

Oneida Financial Corp.

On December 4, 2015, the Company completed its acquisition of Oneida Financial Corp. (“Oneida”), parent company of Oneida Savings Bank, headquartered in Oneida, New York for $158.5 million in Company stock and cash, comprised of $56.3 million of cash and the issuance of 2.38 million common shares.  Upon the completion of the merger, the Bank added 12 branch locations in Oneida and Madison counties and approximately $769.4 million of assets, including approximately $399.4 million of loans and $225.7 million of investment securities, along with $699.2 million of deposits.  Through the acquisition of Oneida, the Company acquired OneGroup and Oneida Wealth Management, Inc. (“OWM”) as wholly-owned subsidiaries primarily engaged in offering insurance and investment advisory services.  These subsidiaries complement the Company’s other non-banking financial services businesses.  The effects of the acquired assets and liabilities have been included in the consolidated financial statements since that date.  On April 22, 2016, the activities of OWM were merged into CISI.

EBS-RMSCO, Inc.

On January 1, 2014, BPAS-APS, formerly known as Harbridge Consulting Group LLC, completed its acquisition of a professional services practice from EBS-RMSCO, Inc., a subsidiary of The Lifetime Healthcare Companies (“EBS-RMSCO”).  This professional services practice, which provides actuarial valuation and consulting services to clients who sponsor pension and post-retirement medical and welfare plans, enhanced the Company’s participation in the Western New York marketplace.

4

Bank of America Branches

On December 13, 2013,  the Bank completed its acquisition of eight retail branch-banking locations across its Northeast Pennsylvania markets from Bank of America, N.A. (“B of A”), acquiring approximately $1.1 million in loans and $303 million of deposits.  The assumed deposits consisted of $220 million of checking, savings and money market accounts (“core deposits”) and $83 million of time deposits.  Under the terms of the purchase agreement, the Bank paid B of A a blended deposit premium of 2.4%, or approximately $7.3 million.

Services

Banking

The Bank is a community bank committed to the philosophy of serving the financial needs of customers in local communities.  The Bank's branches are generally located in smaller towns and cities within its geographic market areas of Upstate New York, Northeastern Pennsylvania, Vermont and Western Massachusetts.  The Company believes that the local character of its business, knowledge of the customers and their needs, and its comprehensive retail and business products, together with responsive decision-making at the branch and regional levels, enable the Bank to compete effectively in its geographic market.   The Bank is a member of the Federal Reserve System (“FRB”), the Federal Home Loan Bank of New York and the Federal Home Loan Bank of Boston (collectively referred to as “FHLB”), and its deposits are insured by the Federal Deposit Insurance Corporation (“FDIC”) up to applicable limits.

Employee Benefit Services

Through BPAS and its subsidiaries, the Company operates a national practice that provides employee benefit trust, collective investment fund, retirement plan administration, fund administration, transfer agency, actuarial, VEBA/HRA and health and welfare consulting services to a diverse array of clients spanning the United States and Puerto Rico.

Wealth Management

Through the Bank, CISI, Carta Group, and Nottingham, the Company provides wealth management, retirement planning, higher educational planning, fiduciary, risk management, and personal financial planning services.  The Company offers investment alternatives including stocks, bonds, mutual funds and advisory products.

Insurance Agency

Through OneGroup, the Company offers personal and commercial property insurance and other risk management products and services. In addition, OneGroup offers employee benefit related services.  OneGroup represents many leading insurance companies.

Segment Information

The Company has identified three reportable operating business segments:  Banking, Employee Benefit Services, and All Other.  Included in the All Other segment are the smaller Wealth Management and Insurance operations.  Information about the Company’s reportable business segments is included in Note U of the “Notes to Consolidated Financial Statements” filed herewith in Part II.

Competition

The banking and financial services industry is highly competitive in the New York, Pennsylvania, Vermont and Massachusetts markets.  The Company competes actively for loans, deposits and customers with other national and state banks, thrift institutions, credit unions, retail brokerage firms, mortgage bankers, finance companies, insurance agencies, and other regulated and unregulated providers of financial services.  In order to compete with other financial service providers, the Company stresses the community nature of its operations and the development of profitable customer relationships across all lines of business.

The table below summarizes the Bank’s deposits and market share by the fifty-four counties of New York, Pennsylvania, Vermont, and Massachusetts in which it has customer facilities.  Market share is based on deposits of all commercial banks, credit unions, savings and loan associations, and savings banks.

5

							Number of
County	State	Deposits as of 6/30/2017(1) (000's omitted)		Market Share(1)			Branches		ATM's		Towns/ Cities		Towns Where Company Has 1st or 2nd Market Position
Grand Isle	VT	$	36,796		100.00	%		1		1		1		1
Lewis	NY		192,249		74.29	%		4		4		3		3
Hamilton	NY		55,239		55.34	%		2		2		2		2
Franklin	NY		336,499		53.36	%		6		6		5		5
Madison	NY		456,572		51.84	%		8		8		5		5
Allegany	NY		271,725		45.18	%		9		10		8		8
Cattaraugus	NY		415,657		32.81	%		10		11		7		6
Otsego	NY		362,180		32.04	%		10		9		6		5
Saint Lawrence	NY		476,376		25.80	%		13		12		11		10
Yates	NY		99,850		25.41	%		3		2		2		1
Schuyler	NY		51,187		25.19	%		1		1		1		1
Seneca	NY		120,754		24.95	%		4		3		4		3
Jefferson	NY		468,133		24.93	%		7		9		6		6
Clinton	NY		377,479		23.23	%		4		7		2		2
Wyoming	PA		137,114		22.03	%		4		4		4		3
Livingston	NY		179,165		19.78	%		5		6		5		4
Chautauqua	NY		363,774		19.12	%		12		12		10		7
Orange	VT		55,309		16.25	%		2		2		2		2
Essex	NY		128,899		15.83	%		5		5		4		3
Oswego	NY		197,101		14.09	%		4		5		4		3
Addison	VT		62,944		10.63	%		2		2		2		2
Ontario	NY		236,981		10.59	%		8		14		5		3
Caledonia	VT		66,903		10.59	%		2		2		2		1
Wayne	NY		133,558		10.56	%		3		4		2		2
Bennington	VT		86,313		9.94	%		2		4		2		0
Delaware	NY		139,908		9.91	%		5		5		5		4
Chittenden	VT		605,611		9.35	%		9		10		6		4
Franklin	VT		54,992		8.96	%		2		2		2		1
Tioga	NY		37,851		8.41	%		2		2		2		1
Rutland	VT		112,866		7.88	%		3		3		2		1
Herkimer	NY		50,229		7.25	%		1		1		1		1
Luzerne	PA		469,025		6.95	%		10		13		8		4
Chemung	NY		74,840		6.90	%		2		2		1		0
Lackawanna	PA		408,991		6.78	%		11		11		8		4
Susquehanna	PA		57,053		6.66	%		3		1		3		2
Steuben	NY		187,442		6.24	%		8		9		7		3
Lamoille	VT		33,262		6.06	%		1		1		1		1
Windham	VT		51,762		5.00	%		2		3		2		1
Schoharie	NY		22,118		4.84	%		1		1		1		0
Oneida	NY		274,408		4.65	%		7		7		6		3
Windsor	VT		56,183		4.24	%		2		1		2		0
Carbon	PA		42,135		4.23	%		2		2		2		1
Washington	VT		94,345		4.07	%		3		5		3		1
Bradford	PA		45,572		3.67	%		2		2		2		1
Cayuga	NY		43,074		3.63	%		2		2		2		1
Washington	NY		18,695		2.43	%		1		0		1		1
Chenango	NY		22,484		2.33	%		2		2		1		0
Warren	NY		35,089		1.94	%		1		1		1		1
Onondaga	NY		131,119		1.02	%		4		4		4		0
Ulster	NY		30,749		0.74	%		1		1		1		1
Broome	NY		34,418		0.56	%		1		1		1		0
Hampden	MA		66,362		0.53	%		1		1		1		0
Erie	NY		129,259		0.32	%		4		4		3		2
Tompkins	NY		5,019		0.17	%		1		0		1		0
		$	8,703,618		5.85	%		225		242		185		127

(1) Deposits and Market Share data as of June 30, 2017, the most recent information available from SNL Financial LLC. Deposit amounts include $78.0 million of intercompany balances that are eliminated upon consolidation.

6

Employees

As of December 31, 2017, the Company employed 2,600 full-time employees, 135 part-time employees and 139 temporary employees.  None of the Company’s employees are represented by a collective bargaining agreement.  The Company offers a variety of employment benefits and considers its relationship with its employees to be good.

Supervision and Regulation

General

The banking industry is highly regulated with numerous statutory and regulatory requirements that are designed primarily for the protection of depositors and the financial system, and not for the purpose of protecting shareholders.  Set forth below is a description of the material laws and regulations applicable to the Company and the Bank.  This summary is not complete and the reader should refer to these laws and regulations for more detailed information.  The Company’s and the Bank’s failure to comply with applicable laws and regulations could result in a range of sanctions and administrative actions imposed upon the Company and/or the Bank, including the imposition of civil money penalties, formal agreements and cease and desist orders.  Changes in applicable law or regulations, and in their interpretation and application by regulatory agencies, cannot be predicted, and may have a material effect on the Company’s business and results.

The Company and its subsidiaries are subject to the laws and regulations of the federal government and the states and jurisdictions in which they conduct business.  The Company, as a bank holding company, is subject to extensive regulation, supervision and examination by the Board of Governors of the Federal Reserve System (“FRB”) as its primary federal regulator.  The Bank is a nationally-chartered bank and is subject to extensive regulation, supervision and examination by the Office of the Comptroller of the Currency (“OCC”) as its primary federal regulator, and as to certain matters, the FRB, the Consumer Financial Protection Bureau (“CFPB”), and the Federal Deposit Insurance Corporation (“FDIC”).

The Company is also subject to the jurisdiction of the SEC and is subject to disclosure and regulatory requirements under the Securities Act of 1933, as amended, and the Securities Exchange Act of 1934, as amended.  The Company’s common stock is listed on the New York Stock Exchange (“NYSE”) and it is subject to NYSE’s rules for listed companies.  Affiliated entities, including BPAS, NRS, HB&T, HSI, BPAS Trust Company of Puerto Rico, Nottingham, CISI, OneGroup, and Carta Group are subject to the jurisdiction of certain state and federal regulators and self-regulatory organizations including, but not limited to, the SEC, the Texas Department of Banking, the State of Maine Bureau of Financial Institutions, the Financial Industry Regulatory Authority (“FINRA”), Puerto Rico Office of the Commissioner of Financial Institutions, and state securities and insurance regulators.

The Company, the Bank, and their respective subsidiaries may be subject to the laws and regulations of the federal government and/or the various states in which they conduct business.

Federal Bank Holding Company Regulation

The Company was a bank holding company under the Bank Holding Company Act of 1956, (the “BHC Act”), and became a financial holding company effective September 30, 2015.  As a bank holding company that has elected to become a financial holding company, the Company can affiliate with securities firms and insurance companies and engage in other activities that are “financial in nature” or “incidental” or “complementary” to activities that are financial in nature, as long as it continues to meet the eligibility requirements for financial holding companies (including requirements that the financial holding company and its depository institution subsidiary maintain their status as “well capitalized” and “well managed”).

Generally, FRB approval is not required for the Company to acquire a company (other than a bank holding company, bank or savings association) engaged in activities that are financial in nature or incidental to activities that are financial in nature, as determined by the FRB.  Prior notice to the FRB may be required, however, if the company to be acquired has total consolidated assets of $10 billion or more.  Prior FRB approval is required before the Company may acquire the beneficial ownership or control of more than 5% of the voting shares or substantially all of the assets of a bank holding company, bank or savings association.

Because the Company is a financial holding company, if the Bank were to receive a rating under the Community Reinvestment Act of 1977, as amended (“CRA”), of less than Satisfactory, the Company will be prohibited, until the rating is raised to Satisfactory or better, from engaging in new activities or acquiring companies other than bank holding companies, banks or savings associations, except that the Company could engage in new activities, or acquire companies engaged in activities, that are considered “closely related to banking” under the BHC Act.  In addition, if the FRB determines that the Company or the Bank is not well capitalized or well managed, the Company would be required to enter into an agreement with the FRB to comply with all applicable capital and management requirements and may contain additional limitations or conditions.  Until corrected, the Company could be prohibited from engaging in any new activity or acquiring companies engaged in activities that are not closely related to banking, absent prior FRB approval.

7

Federal Reserve System Regulation

Because the Company is a financial holding company, it is subject to regulatory capital requirements and required by the FRB to, among other things, maintain cash reserves against its deposits.  The Bank is under similar capital requirements administered by the OCC as discussed below.  FRB policy has historically required a financial holding company to act as a source of financial and managerial strength to its subsidiary banks.  The Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010 (the “Dodd-Frank Act”) codifies this historical policy as a statutory requirement.  To the extent the Bank is in need of capital, the Company could be expected to provide additional capital, including borrowings from the FRB for such purpose.  Both the Company and the Bank are subject to extensive supervision and regulation, which focus on, among other things, the protection of depositors’ funds.

The FRB also regulates the national supply of bank credit in order to influence general economic conditions.  These policies have a significant influence on overall growth and distribution of loans, investments and deposits, and affect the interest rates charged on loans or paid for deposits.

Fluctuations in interest rates, which may result from government fiscal policies and the monetary policies of the FRB, have a strong impact on the income derived from loans and securities, and interest paid on deposits and borrowings.  While the Company and the Bank strive to model various interest rate changes and adjust our strategies for such changes, the level of earnings can be materially affected by economic circumstances beyond our control.

The Office of Comptroller of the Currency Regulation

The Bank is supervised and regularly examined by the OCC.  The various laws and regulations administered by the OCC affect the Company’s practices such as payment of dividends, incurring debt, and acquisition of financial institutions and other companies.  It also affects the Bank’s business practices, such as payment of interest on deposits, the charging of interest on loans, types of business conducted and the location of its offices.  The OCC generally prohibits a depository institution from making any capital distributions, including the payment of a dividend, or paying any management fee to its parent holding company if the depository institution would become undercapitalized due to the payment.  Undercapitalized institutions are subject to growth limitations and are required to submit a capital restoration plan to the OCC.  The Bank is well capitalized under regulatory standards administered by the OCC.  For additional information on our capital requirements see “Management’s Discussion and Analysis of Financial Condition and Results of Operations – Shareholders’ Equity” and Note P to the Financial Statements.

Federal Home Loan Bank

The Bank is a member of the FHLB, which provides a central credit facility primarily for member institutions for home mortgage and neighborhood lending.  The Bank is subject to the rules and requirements of the FHLB, including the purchase of shares of FHLB activity-based stock in the amount of 4.5% of the dollar amount of outstanding advances and FHLB capital stock in an amount equal to the greater of $1,000 or the sum of 0.15% of the mortgage-related assets held by the Bank based upon the previous year-end financial information.  The Bank was in compliance with the rules and requirements of the FHLB at December 31, 2017.

Deposit Insurance

Deposits of the Bank are insured up to the applicable limits by the Deposit Insurance Fund (“DIF”) and are subject to deposit insurance assessments to maintain the DIF.  The Dodd-Frank Act permanently increased the maximum amount of deposit insurance to $250,000 per deposit category, per depositor, per institution.  A depository institution’s DIF assessment is calculated by multiplying its assessment rate by the assessment base, which is defined as the average consolidated total assets less the average tangible equity of the depository institution.  The initial base assessment rate is based on its capital level and supervisory ratings (its “CAMELS ratings”), certain financial measures to assess an institution’s ability to withstand asset related stress and funding related stress and, in some cases, additional discretionary adjustments by the FDIC to reflect additional risk factors.  The Bank’s adjusted average consolidated total assets for 4 consecutive quarters will exceed $10.0 billion in 2018, which will result in a deposit insurance assessment based on a large institution classification, rather than the small institution classification for years prior to 2018.

For large insured depository institutions, generally defined as those with at least $10 billion in total assets, the FDIC has eliminated risk categories when calculating the initial base assessment rates and now combine CAMELS ratings and financial measures into two scorecards to calculate assessment rates, one for most large insured depository institutions and another for highly complex insured depository institutions (which are generally those with more than $50 billion in total assets that are controlled by a parent company with more than $500 billion in total assets). Each scorecard has two components - a performance score and loss severity score, which are combined and converted to an initial assessment rate. The FDIC has the ability to adjust a large or highly complex insured depository institution’s total score by a maximum of 15 points, up or down, based upon significant risk factors that are not captured by the scorecard. Under the current assessment rate schedule, the initial base assessment rate for large and highly complex insured depository institutions ranges from three to 30 basis points, and the total base assessment rate, after applying the unsecured debt and brokered deposit adjustments, ranges from one and one-half to 40 basis points.

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In October 2010, the FDIC adopted a DIF restoration plan to ensure that the fund reserve ratio reaches 1.35% by September 30, 2020, as required by the Dodd-Frank Act.  At least semi-annually, the FDIC will update its loss and income projections for the fund and, if needed, will increase or decrease assessment rates, following notice-and-comment rulemaking if required.  On June 30, 2016, the fund reserve ratio reached 1.15% and the assessment rate schedule was lowered.  FDIC insurance expense totaled $3.5 million, $3.7 million and $4.0 million in 2017, 2016 and 2015, respectively.

Under the Federal Deposit Insurance Act, if the FDIC finds that an institution has engaged in unsafe and unsound practices, is in an unsafe or unsound condition to continue operations, or has violated any applicable law, regulation, rule, order or condition imposed by the FDIC, the FDIC may determine that such violation or unsafe or unsound practice or condition require the termination of deposit insurance.

Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010

On July 21, 2010, the Dodd-Frank Act was signed into law, which resulted in significant changes to the banking industry.  The Dodd-Frank Act contains numerous provisions that affect all banks and bank holding companies and impacts how the Company and the Bank handle their operations.  The Dodd-Frank Act requires various federal agencies, including those that regulate the Company and the Bank, to promulgate new rules and regulations and to conduct various studies and reports for Congress.  The federal agencies have either completed or are in the process of completing these rules and regulations and have been given significant discretion in drafting such rules and regulations.  Several of the provisions of the Dodd-Frank Act may have the consequence of increasing the Bank’s expenses, decreasing its revenues, and changing the activities in which it chooses to engage.  The specific impact of the Dodd-Frank Act on the Company’s current activities or new financial activities the Company may consider in the future, the Company’s financial performance, and the markets in which the Company operates depends on the manner in which the relevant agencies continue to develop and implement the required rules and regulations and the reaction of market participants to these regulatory developments.

Pursuant to FRB regulations mandated by the Dodd-Frank Act, interchange fees on debit card transactions are limited to a maximum of $0.21 per transaction plus 5 basis points of the transaction amount.  A debit card issuer may recover an additional one cent per transaction for fraud prevention purposes if the issuer complies with certain fraud-related requirements prescribed by the FRB.  The Company has been exempt from the interchange fee cap under the "small issuer" exemption, which applies to any debit card issuer with total worldwide assets (including those of its affiliates) of less than $10 billion as of the end of the previous calendar year.  However, the Company had $10.7 billion in assets as of December 31, 2017, and will become subject to the interchange fee limitations beginning July 1, 2018.  As such, the fees the Company may receive for an electronic debit transaction will be capped at the statutory limit.  The FRB also adopted requirements in the final rule that issuers include two unaffiliated networks for routing debit transactions that are applicable to the Company and the Bank.

The Dodd-Frank Act established the CFPB and empowered it to exercise broad rulemaking, supervision, and enforcement authority for a wide range of consumer protection laws.  Since the Company’s total consolidated assets exceeded $10 billion during the second quarter of 2018, the Company will now be subject to the direct supervision of the CFPB.  The CFPB has issued and continues to issue numerous regulations under which the Company and the Bank will continue to incur additional expense in connection with its ongoing compliance obligations.  Significant recent CFPB developments that may affect operations and compliance costs include:

· positions taken by the CFPB on fair lending, including applying the disparate impact theory which could make it more difficult for lenders to charge different rates or to apply different terms to loans to different customers;

· the CFPB’s final rule amending Regulation C, which implements the Home Mortgage Disclosure Act, requiring most lenders to report expanded information in order for the CFPB to more effectively monitor fair lending concerns and other information shortcomings identified by the CFPB;

· positions taken by the CFPB regarding the Electronic Fund Transfer Act and Regulation E, which require companies to obtain customer authorizations before automatically debiting a consumer’s account for pre-authorized electronic funds transfers; and

· focused efforts on enforcing certain compliance obligations the CFPB deems a priority, such as automobile loan servicing, debt collection, mortgage origination and servicing, remittances, and fair lending, among others.

The final rules issued by the FRB, SEC, OCC, FDIC, and Commodity Futures Trading Commission implementing Section 619 of the Dodd-Frank Act (commonly known as the Volcker Rule) prohibit insured depository institutions and companies affiliated with insured depository institutions from engaging in short-term proprietary trading of certain securities, derivatives, commodity futures and options on these instruments, for their own account.  The final rules also impose limits on banking entities’ investments in, and other relationships with, hedge funds or private equity funds.

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The scope and impact of many of the Dodd-Frank Act’s provisions will continue to be determined over time, including as final regulations are issued and become effective.  As a result, the Company cannot predict the ultimate impact of the Dodd-Frank Act on the Company or the Bank at this time, including the extent to which it could increase costs or limit the Company’s ability to pursue business opportunities in an efficient manner, or otherwise adversely affect its business, financial condition and results of operations.  Nor can the Company predict the impact or substance of other future legislation or regulation.  However, it is expected that future legislation or regulation at a minimum will increase the Company’s and the Bank’s operating and compliance costs.  As rules and regulations continue to be implemented or issued, the Company may need to dedicate additional resources to ensure compliance, which may increase its costs of operations and adversely impact its earnings.

Capital Requirements

The Company and the Bank are required to comply with applicable capital adequacy standards established by the federal banking agencies.  The risk-based capital standards that were applicable to the Company and the Bank through December 31, 2014 were based on the 1988 Capital Accord, known as Basel I (“Basel I”), of the Basel Committee on Banking Supervision (the “Basel Committee”).  However, in July 2013, the FRB, the OCC and the FDIC approved final rules (the “New Capital Rules”) establishing a new comprehensive capital framework for U.S. banking organizations.  These rules went into effect for the Company and the Bank on January 1, 2015, subject to phase-in periods for certain components.

The New Capital Rules implement the Basel Committee’s December 2010 capital framework (known as “Basel III”) for strengthening international capital standards as well as certain provisions of the Dodd-Frank Act.  The New Capital Rules substantially revise the risk-based capital requirements applicable to bank holding companies and depository institutions, including the Company and the Bank, compared to the previous U. S. Basel I risk-based capital rules.  The New Capital Rules define the components of capital and address other issues affecting the numerator in banking institutions regulatory capital ratios and replace the Basel I risk-weighting approach, with a more risk-sensitive one, based in part, on the standardized approach set forth in “Basel II”.  The New Capital Rules also implement the requirements of Section 939A of the Dodd-Frank Act to remove references to credit ratings from the Federal banking agencies’ rules.

The New Capital Rules, among other things: (i) introduces as a new capital measure “Common Equity Tier 1,” (“CET1”), (ii) specify that Tier 1 capital consists of CET1 and “Additional Tier 1 capital” instruments meeting specified revised requirements, (iii) defines CET1 narrowly by requiring that most deductions/adjustments to regulatory capital measures be made to CET1 and not to the other components of capital, and (iv) expands the scope of the deductions from and adjustments to capital as compared to existing regulations.  Under the New Capital Rules, the most common form of Additional Tier 1 capital is non-cumulative perpetual preferred stock, and the most common form of Tier 2 capital is subordinated notes and a portion of the allowance for loan and lease losses, in each case, subject to the New Capital Rules specific requirements.

Under the New Capital Rules, the minimum capital ratios as of January 1, 2015 are as follows:

· 4.5% CET1 to total risk-weighted assets;

· 6.0% Tier 1 capital (CET1 plus Additional Tier 1 capital) to total risk-weighted assets;

· 8.0% Total capital (Tier 1 Capital plus Tier 2 capital) to total risk-weighted assets;

· 4.0% Tier 1 capital to total adjusted quarterly average assets (known as “leverage ratio”)

Beginning in 2016, the New Capital Rules required the Company and the Bank to maintain a “capital conservation buffer” composed entirely of CET1. When it is fully phased-in by the beginning of 2019, banking organizations will be required to maintain a minimum capital conservation buffer of 2.5% (CET1 to Total risk-weighted assets), in addition to the minimum risk-based capital ratios. Therefore, to satisfy both the minimum risk-based capital ratios and the capital conservation buffer, a banking organization will be required to maintain the following: (i) CET1 to total risk-weighted assets of at least 7%, (ii) Tier 1 capital to total risk-weighted assets of at least 8.5%, and (iii) Total capital (Tier 1 capital plus Tier 2 capital) to total risk-weighted assets of at least 10.5% by January 1, 2019, upon full phase-in of the capital conservation buffer. The capital conservation buffer is designed to absorb losses during periods of economic stress. Banking institutions that do not maintain a capital conservation buffer of 2.5% or more will face constraints on dividends, common share repurchases and incentive compensation based on the amount of the shortfall.

The New Capital Rules provide for a number of deductions from and adjustments to CET1. These include, for example, the requirement that mortgage servicing rights, deferred tax assets dependent upon future taxable income and significant investments in non-consolidated financial entities be deducted from CET1 to the extent that any one such category exceeds 10% of CET1 or all such categories in the aggregate exceed 15% of CET1. Under the general Basel I risk-based capital rules, the effects of accumulated other comprehensive income or loss items included in shareholders' equity (for example, marks-to-market of securities held in the available for sale portfolio) were reversed for the purposes of determining regulatory capital. Under the New Capital Rules, the effects of certain accumulated other comprehensive income or loss items are not excluded; however, banks not using the advanced approach, including the Company and the Bank, were permitted to, and in the case of the Company and the Bank they did, make a one-time permanent election to continue to exclude these items.

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Consistent with the section 171 of the Dodd-Frank Act, the New Capital Rules allow certain bank holding companies to include certain hybrid securities, such as trust preferred securities, in Tier 1 capital if they had less than $15 billion in assets as of December 31, 2009 and the securities were issued before May 19, 2010.  Accordingly, the trust preferred securities classified as long-term debt on the Company’s balance sheet will be included as Tier 1 capital while they are outstanding, unless the Company completes an acquisition of a depository institution holding company that did not meet this criteria, or are acquired by such an organization, after January 1, 2014, at which time they would be subject to the stated phase-out requirements of the New Capital Rules and would be included as Tier 2 capital.

Implementation of the deductions and other adjustments to CET1 began on January 1, 2015 and will be phased-in over a 4-year period (beginning at 40% on January 1, 2015 and an additional 20% per year thereafter). The implementation of the capital conservation buffer began on January 1, 2016 at the 0.625% level and will be phased in over a four-year period (increasing by that amount on each subsequent January 1, until it reaches 2.5% on January 1, 2019).

With respect to the Bank, the New Capital Rules also revise the prompt corrective action (“PCA”) regulations established pursuant to Section 38 of the Federal Deposit Insurance Act, by (i) introducing a CET1 ratio requirement for each capital category other than critically undercapitalized, with the required CET1 ratio being 6.5% for well-capitalized status; (ii) increasing the minimum Tier 1 capital ratio requirement for each capital category, with the minimum Tier 1 capital ratio for well-capitalized status being 8.0%; and (iii) eliminating the current provision that allows certain highly-rated banking organizations to maintain a 3.0% leverage ratio and still be adequately capitalized. The New Capital Rules do not change the Total risk-based PCA capital requirement for any capital category.

The New Capital Rules prescribe a new standardized approach for risk weighted-assets that expands the risk-weight categories from the current four Basel I-derived categories (0%, 20%, 50% and 100%) to a larger and more risk-sensitive number of categories, depending on the nature of the asset. The new risk-weight categories generally range from 0% for U.S. government and agency securities, to 1,250% for certain securitized exposures, and result in higher risk weights for a variety of asset categories. The standardized approach requires financial institutions to transition assets that are 90 days or more past due or on nonaccrual from their original risk weight to 150 percent.  Additionally, loans designated as high volatility commercial real estate (“HVCRE”) are assigned a risk-weighting of 150 percent.

Requirements to maintain higher levels of capital or to maintain higher levels of liquid assets could adversely impact the Company's net income and return on equity. The current requirements and the Company's actual capital levels are detailed in Note P of “Notes to Consolidated Financial Statements” filed in Part II, Item 8, “Financial Statements and Supplementary Data.”

Consumer Protection Laws

In connection with its banking activities, the Bank is subject to a number of federal and state laws designed to protect borrowers and promote lending to various sectors of the economy.  These laws include the Equal Credit Opportunity Act, the Gramm-Leach-Bliley Act (“GLB Act”), the Fair Credit Reporting Act (“FCRA”), the Fair and Accurate Credit Transactions Act of 2003 (“FACT Act”), Electronic Funds Transfer Act, the Truth in Lending Act, the Home Mortgage Disclosure Act, the Dodd-Frank Act, the Real Estate Settlement Procedures Act, the Secure and Fair Enforcement for Mortgage Licensing Act (“SAFE”), and various state law counterparts.

The Dodd-Frank Act created the CFPB with broad powers to supervise and enforce consumer protection laws, including laws that apply to banks in order to prohibit unfair, deceptive or abusive practices.  The CFPB has examination authority over all banks and savings institutions with more than $10 billion in assets.  The Dodd-Frank Act weakens the federal preemption rules that have been applicable to national banks and gives attorney generals for the states certain powers to enforce federal consumer protection laws.  Further, under the Dodd-Frank Act, it is unlawful for any provider of consumer financial products or services to engage in any unfair, deceptive, or abusive acts or practice (“UDAAP”).  A violation of the consumer protection and privacy laws, and in particular UDAAP, could have serious legal, financial, and reputational consequences.

In addition, the GLB Act requires all financial institutions to adopt privacy policies, restrict the sharing of nonpublic customer data with nonaffiliated parties and establishes procedures and practices to protect customer data from unauthorized access.  In addition, the FCRA, as amended by the FACT Act, includes provisions affecting the Company, the Bank, and their affiliates, including provisions concerning obtaining consumer reports, furnishing information to consumer reporting agencies, maintaining a program to prevent identity theft, sharing of certain information among affiliated companies, and other provisions.  The FACT Act requires persons subject to FCRA to notify their customers if they report negative information about them to a credit bureau or if they are granted credit on terms less favorable than those generally available.  The FRB and the Federal Trade Commission have extensive rulemaking authority under the FACT Act, and the Company and the Bank are subject to the rules that have been created under the FACT Act, including rules regarding limitations on affiliate marketing and implementation of programs to identify, detect and mitigate certain identity theft red flags.  The Bank is also subject to data security standards and data breach notice requirements issued by the OCC and other regulatory agencies.  The Bank has created policies and procedures to comply with these consumer protection requirements.

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The CFPB issued the final rules implementing the ability-to-repay and qualified mortgage (QM) provisions of the Truth in Lending Act, as amended by the Dodd-Frank Act (the “QM Rule”).  The ability-to-repay provision requires creditors to make reasonable, good faith determinations that borrowers are able to repay their mortgages before extending the credit based on a number of factors and consideration of financial information about the borrower derived from reasonably reliable third-party documents. Under the Dodd-Frank Act and the QM Rule, loans meeting the definition of “qualified mortgage” are entitled to a presumption that the lender satisfied the ability-to-repay requirements.  The presumption is a conclusive presumption/safe harbor for loans meeting the QM requirements, and a rebuttable presumption for higher-priced loans meeting the QM requirements.  The definition of a “qualified mortgage” incorporates the statutory requirements, such as not allowing negative amortization or terms longer than 30 years. The QM Rule also adds an explicit maximum 43% debt-to-income ratio for borrowers if the loan is to meet the QM definition, though some mortgages that meet government-sponsored enterprises, Federal Housing Administration, and Veterans Administration underwriting guidelines may, for a period not to exceed seven years, meet the QM definition without being subject to the 43% debt-to-income limits.  The Bank has created policies and procedures to comply with these consumer protection requirements.

USA Patriot Act

The Uniting and Strengthening America by Providing Appropriate Tools Required to Intercept and Obstruct Terrorism Act of 2001 (“USA Patriot Act”) imposes obligations on U.S. financial institutions, including banks and broker-dealer subsidiaries, to implement policies, procedures and controls which are reasonably designed to detect and report instances of money laundering and the financing of terrorism.  In addition, provisions of the USA Patriot Act require the federal financial institution regulatory agencies to consider the effectiveness of a financial institution’s anti-money laundering activities when reviewing bank mergers and bank holding company acquisitions.  The USA Patriot Act also encourages information-sharing among financial institutions, regulators, and law enforcement authorities by providing an exemption from the privacy provisions of the GLB Act for financial institutions that comply with the provision of the Act.  Failure of a financial institution to maintain and implement adequate programs to combat money laundering and terrorist financing, or to comply with all of the relevant laws or regulations, could have serious legal, financial and reputational consequences for the institution.  The Company has approved policies and procedures that are designed to comply with the USA Patriot Act and its regulations.

Office of Foreign Assets Control Regulation

The United States has imposed economic sanctions that affect transactions with designated foreign countries, nationals and others administrated by the Treasury’s Office of Foreign Assets Control (“OFAC”).  The OFAC administered sanctions can take many different forms; however, they generally contain one or more of the following elements: (i) restrictions on trade with or investment in a sanctioned country, entity or individual, including prohibitions against direct or indirect imports and exports and prohibitions on “U.S. persons” engaging in financial transactions relating to making investments, or providing investment related advice or assistance; and (ii) a blocking of assets in which the government or specially designated nationals have an interest, by prohibiting transfers of property subject to U.S. jurisdiction (including property in the possession or control of U.S. persons).  Blocked assets (e.g., property and bank deposits) cannot be paid out, withdrawn, set off or transferred in any manner without a license from OFAC.  Failure to comply with these sanctions could have serious legal, financial, and reputational consequences.

Sarbanes-Oxley Act of 2002

The Sarbanes-Oxley Act of 2002 (“Sarbanes-Oxley Act”) implemented a broad range of corporate governance, accounting and reporting reforms for companies that have securities registered under the Securities Exchange Act of 1934, as amended.  In particular, the Sarbanes-Oxley Act established, among other things: (i) new requirements for audit and other key Board of Directors committees involving independence, expertise levels, and specified responsibilities; (ii) additional responsibilities regarding the oversight of financial statements by the Chief Executive Officer and Chief Financial Officer of the reporting company; (iii) the creation of an independent accounting oversight board for the accounting industry; (iv) new standards for auditors and the regulation of audits, including independence provisions which restrict non-audit services that accountants may provide to their audit clients; (v) increased disclosure and reporting obligations for the reporting company and its directors and executive officers including accelerated reporting of company stock transactions; (vi) a prohibition of personal loans to directors and officers, except certain loans made by insured financial institutions on non-preferential terms and in compliance with other bank regulator requirements; and (vii) a range of new and increased civil and criminal penalties for fraud and other violations of the securities laws.

Electronic Fund Transfer Act

A federal banking rule under the Electronic Fund Transfer Act prohibits financial institutions from charging consumers fees for paying overdrafts on automated teller machines and one-time debit card transactions, unless a consumer consents, or opts in, to the overdraft service for those types of transactions.  The new rule does not govern overdraft fees on the payment of checks and certain other forms of bill payments.

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Community Reinvestment Act of 1977

Under the Community Reinvestment Act of 1977 (“CRA”), the Bank is required to help meet the credit needs of its communities, including low- and moderate-income neighborhoods.  Although the Bank must follow the requirements of CRA, it does not limit the Bank’s discretion to develop products and services that are suitable for a particular community or establish lending requirements or programs.  In addition, the Equal Credit Opportunity Act and the Fair Housing Act prohibits discrimination in lending practices.  The Bank’s failure to comply with the provisions of the CRA could, at a minimum, result in regulatory restrictions on its activities and the activities of the Company.  The Bank’s failure to comply with the Equal Credit Opportunity Act and the Fair Housing Act could result in enforcement actions against it by its regulators as well as other federal regulatory agencies and the Department of Justice.  The Bank’s latest CRA rating was “Satisfactory”.

The Bank Secrecy Act

The Bank Secrecy Act (“BSA”) requires all financial institutions, including banks and securities broker-dealers, to, among other things, establish a risk-based system of internal controls reasonably designed to prevent money laundering and the financing of terrorism.  The BSA includes a variety of recordkeeping and reporting requirements (such as cash and suspicious activity reporting), as well as due diligence/know-your-customer documentation requirements.  The Company has established an anti-money laundering program and taken other appropriate measures in order to comply with BSA requirements.

Item 1A. Risk Factors

There are risks inherent in the Company’s business.  The material risks and uncertainties that management believes affect the Company are described below.  Adverse experience with these could have a material impact on the Company’s financial condition and results of operations.

Changes in interest rates affect our profitability, assets and liabilities.

The Company’s income and cash flow depends to a great extent on the difference between the interest earned on loans and investment securities, and the interest paid on deposits and borrowings.  Interest rates are highly sensitive to many factors that are beyond the Company’s control, including general economic conditions and policies of various governmental and regulatory agencies and, in particular, the FRB.  Changes in monetary policy, including changes in interest rates, could influence not only the interest we receive on loans and securities and the amount of interest we pay on deposits and borrowings, but such changes could also affect (1) our ability to originate loans and obtain deposits, which could reduce the amount of fee income generated, (2) the fair value of our financial assets and liabilities and (3) the average duration of the Company’s various categories of earning assets.  If the interest rates paid on deposits and other borrowings increase at a faster rate than the interest rates received on loans and other investments, our net interest income could be adversely affected, which in turn could negatively affect our earnings.  Earnings could also be adversely affected if the interest rates received on loans and other investments fall more quickly than the interest rates paid on deposits and other borrowings.  Although management believes it has implemented effective asset and liability management strategies to reduce the potential effects of changes in interest rates on the results of operations, any substantial, unexpected, prolonged change in market interest rates could have a material adverse effect on the financial condition and results of operations.

The Company operates in a highly regulated environment and may be adversely affected by changes in laws and regulations or the interpretation and examination of existing laws and regulations.

The Company and its subsidiaries are subject to extensive state and federal regulation, supervision and legislation that govern nearly every aspect of its operations.  The Company, as a financial holding company, is subject to regulation by the FRB and its banking subsidiary is subject to regulation by the OCC.  These regulations affect deposit and lending practices, capital levels and structure, investment practices, dividend policy and growth.  In addition, the non-bank subsidiaries are engaged in providing retirement plan administration, fiduciary services to collective investment funds, investment management and insurance brokerage services, which industries are also heavily regulated at both a state and federal level.  Such regulators govern the activities in which the Company and its subsidiaries may engage.  These regulatory authorities have extensive discretion in connection with their supervisory and enforcement activities, including the imposition of restrictions on the operation of a bank, the classification of assets by a bank and the adequacy of a bank’s allowance for loan losses.  Any change in such regulation and oversight, whether in the form of regulatory policy, regulations, legislation, interpretation or application, could have a material impact on the Company and its operations.  Changes to the regulatory laws governing these businesses could affect the Company’s ability to deliver or expand its services and adversely impact its operating and financial condition.

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For example, the Dodd-Frank Act, enacted in July 2010, instituted major changes to the banking and financial institutions regulatory regimes based upon the performance of, and ultimate government intervention in, the financial services sector.  To date, not all the rules required or expected to be implemented under the Dodd-Frank Act have been adopted and many of the rules that have been adopted are subject to interpretation or clarification.  The implications of the Dodd-Frank Act for the Company’s businesses continue to depend to a large extent on the implementation of the legislation by the FRB and other agencies as well as how market practices and structures change in response to the requirements of the Dodd-Frank Act.  All of these changes in regulations could subject the Company, among other things, to additional costs and limit the types of financial services and products it can offer and/or increase the ability of non-banks to offer competing financial services and products.

The Company is also directly subject to the requirements of entities that set and interpret the accounting standards such as the Financial Accounting Standards Board, and indirectly subject to the actions and interpretations of the Public Company Accounting Oversight Board, which establishes auditing and related professional practice standards for registered public accounting firms and inspects registered firms to assess their compliance with certain laws, rules, and professional standards in public company audits.  These regulations, along with the currently existing tax, accounting, securities, insurance, and monetary laws, regulations, rules, standards, policies and interpretations, control the methods by which financial institutions and their holding companies conduct business, engage in strategic and tax planning, implement strategic initiatives, and govern financial reporting.

The Company’s failure to comply with laws, regulations or policies could result in civil or criminal sanctions and money penalties by state and federal agencies, and/or reputation damage, which could have a material adverse effect on the Company’s business, financial condition and results of operations.  See “Supervision and Regulation” for more information about the regulations to which the Company is subject.

The Company’s total consolidated assets exceeded $10 billion and is therefore subject to additional regulation and increased supervision including the CFPB.

The Dodd-Frank Act imposes additional regulatory requirement on institutions with $10 billion or more in assets.  The Company had $10.7 billion in assets as of December 31, 2017 as a result of the merger with Merchants in May 2017.  The Company is now subject to the following: (1) supervision, examination and enforcement by the CFPB with respect to consumer financial protection laws, (2) regulatory stress testing requirements, whereby the Company will be required to conduct an annual stress test using assumptions for baseline, adverse and severely adverse scenarios, (3) a modified methodology for calculating FDIC insurance assessments and potentially higher assessment rates as a result of institutions with $10 billion or more in assets being required to bear a greater portion of the cost of raising the reserve ratio to 1.35% as required by the Dodd-Frank Act, (4) limitations on interchange fees for debit card transactions, (5) heightened compliance standards under the Volcker Rule, and (6) enhanced supervision as a larger financial institution.  The imposition of these regulatory requirements and increased supervision may continue to require additional commitment of financial resources to regulatory compliance and may increase the Company’s cost of operations.  Further, the results of the stress testing process may lead the Company to retain additional capital or alter the mix of its capital components.

Basel III capital rules generally require insured depository institutions and their holding companies to hold more capital, which could limit our ability to pay dividends, engage in share repurchases and pay discretionary bonuses.

The Federal Reserve, the FDIC and the OCC adopted final rules for the Basel III capital framework which substantially amended the regulatory risk-based capital rules applicable to the Company. The rules phase in over time becoming fully effective in 2019.  Beginning in 2016, a capital conservation buffer will phase in over three years, ultimately resulting in a requirement of 2.5% on top of the common Tier 1, Tier 1 and total capital requirements, resulting in a required common Tier 1 equity ratio of 7%, a Tier 1 ratio of 8.5%, and a total capital ratio of 10.5%. Failure to satisfy any of these three capital requirements will result in limits on paying dividends, engaging in share repurchases and paying discretionary bonuses. These limitations will establish a maximum percentage of eligible retained income that could be utilized for such actions.

Regional economic factors may have an adverse impact on the Company’s business.

The Company’s main markets are located in the states of New York, Pennsylvania, Vermont and Massachusetts.  Most of the Company’s customers are individuals and small and medium-sized businesses which are dependent upon the regional economy.  Accordingly, the local economic conditions in these areas have a significant impact on the demand for the Company’s products and services as well as the ability of the Company’s customers to repay loans, the value of the collateral securing loans and the stability of the Company’s deposit funding sources.  A prolonged economic downturn in these markets could negatively impact the Company.

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The Company is subject to a variety of operational risks, including reputational risk, legal and compliance risk, the risk of fraud or theft by employees or outsiders, which may adversely affect the Company’s business and results of operations.

The Company is exposed to many types of operational risks, including reputational risk, legal and compliance risk, the risk of fraud or theft by employees or outsiders, unauthorized transactions by employees, or operational errors, including clerical or record keeping errors or those resulting from faulty or disabled computer or telecommunications systems or disclosure of confidential proprietary information of its customers.  Negative public opinion can result from actual or alleged conduct in any number of activities, including lending practices, sales practices, customer treatment, corporate governance and acquisitions and from actions taken by government regulators and community organizations in response to those activities. Negative public opinion can adversely affect the Company’s ability to attract and keep customers and can expose the Company to litigation and regulatory action. Actual or alleged conduct by the Company can result in negative public opinion about its business.

If personal, nonpublic, confidential, or proprietary information of customers in the Company’s possession were to be mishandled or misused, the Company could suffer significant regulatory consequences, reputational damage, and financial loss. Such mishandling or misuse could include, for example, if such information were erroneously provided to parties who are not permitted to have the information, either by fault of its systems, employees, or counterparties, or where such information is intercepted or otherwise inappropriately taken by third parties.

Because the nature of the financial services business involves a high volume of transactions, certain errors may be repeated or compounded before they are discovered and successfully rectified. The Company’s necessary dependence upon automated systems to record and process transactions and the large transaction volumes may further increase the risk that technical flaws or employee tampering or manipulation of those systems will result in losses that are difficult to detect.  The Company also may be subject to disruptions of our operating systems arising from events that are wholly or partially beyond its control (for example, computer viruses or electrical or telecommunications outages), which may give rise to disruption of service to customers and to financial loss or liability. The Company is further exposed to the risk that external vendors may be unable to fulfill their contractual obligations (or will be subject to the same risk of fraud or operational errors by their respective employees) and to the risk that business continuity and data security systems prove to be inadequate. The occurrence of any of these risks could result in a diminished ability to operate the Company’s business, potential liability to clients, reputational damage, and regulatory intervention, which could adversely affect our business, financial condition, and results of operations, perhaps materially.

The financial services industry is highly competitive and creates competitive pressures that could adversely affect the Company’s revenue and profitability.

The financial services industry in which the Company operates is highly competitive.  The Company competes not only with commercial and other banks and thrifts, but also with insurance companies, mutual funds, hedge funds, securities brokerage firms and other companies offering financial services in the U.S., globally and over the Internet.  The Company competes on the basis of several factors, including capital, access to capital, revenue generation, products, services, transaction execution, innovation, reputation and price.  Over time, certain sectors of the financial services industry have become more concentrated, as institutions involved in a broad range of financial services have been acquired by or merged into other firms.  These developments could result in the Company’s competitors gaining greater capital and other resources, such as a broader range of products and services and geographic diversity.  The Company may experience pricing pressures as a result of these factors and as some of its competitors seek to increase market share by reducing prices or paying higher rates of interest on deposits.  Finally, technological change is influencing how individuals and firms conduct their financial affairs and changing the delivery channels for financial services, with the result that the Company may have to contend with a broader range of competitors including many that are not located within the geographic footprint of its banking office network.

Conditions in the insurance market could adversely affect the Company’s earnings.

Revenue from insurance fees and commissions could be negatively affected by fluctuating premiums in the insurance markets or other factors beyond the Company’s control.  Other factors that affect insurance revenue are the profitability and growth of the Company’s clients, the renewal rate of the current insurance policies, continued development of new product and services as well as access to new markets.  The Company’s insurance revenues and profitability may also be adversely affected by new laws and regulatory developments impacting the healthcare and insurance markets.

The allowance for loan losses may be insufficient.

The Company’s business depends on the creditworthiness of its customers.  The Company reviews the allowance for loan losses quarterly for adequacy considering economic conditions and trends, collateral values and credit quality indicators, including past charge-off experience and levels of past due loans and nonperforming assets.  If the Company’s assumptions prove to be incorrect, the Company’s allowance for loan losses may not be sufficient to cover losses inherent in the Company’s loan portfolio, resulting in additions to the allowance.  Material additions to the allowance would materially decrease its net income.  It is possible that over time the allowance for loan losses will be inadequate to cover credit losses in the portfolio because of unanticipated adverse changes in the economy, market conditions or events adversely affecting specific customers, industries or markets.

15

Changes in the equity markets could materially affect the level of assets under management and the demand for other fee-based services.

Economic downturns could affect the volume of income from and demand for fee-based services.  Revenue from the wealth management and benefit plan administration businesses depends in large part on the level of assets under management and administration.  Market volatility, and the potential to lead customers to liquidate investments, as well as lower asset values, can reduce the level of assets under management and administration and thereby decrease the Company’s investment management and administration revenues.

Mortgage banking income may experience significant volatility.

Mortgage banking income is highly influenced by the level and direction of mortgage interest rates, and real estate and refinancing activity.  In lower interest rate environments, the demand for mortgage loans and refinancing activity will tend to increase.  This has the effect of increasing fee income, but could adversely impact the estimated fair value of the Company’s mortgage servicing rights as the rate of loan prepayments increase.  In higher interest rate environments, the demand for mortgage loans and refinancing activity will generally be lower.  This has the effect of decreasing fee income opportunities.

The Company depends on dividends from its banking subsidiary for cash revenues, but those dividends are subject to restrictions.

The ability of the Company to satisfy its obligations and pay cash dividends to its shareholders is primarily dependent on the earnings of and dividends from the subsidiary bank.  However, payment of dividends by the bank subsidiary is limited by dividend restrictions and capital requirements imposed by bank regulations.  The ability to pay dividends is also subject to the continued payment of interest that the Company owes on its subordinated junior debentures.  As of December 31, 2017, the Company had $122.8 million of subordinated junior debentures outstanding.  The Company has the right to defer payment of interest on the subordinated junior debentures for a period not exceeding 20 quarters, although the Company has not done so to date.  If the Company defers interest payments on the subordinated junior debentures, it will be prohibited, subject to certain exceptions, from paying cash dividends on the common stock until all deferred interest has been paid and interest payments on the subordinated junior debentures resumes.

The risks presented by acquisitions could adversely affect the Company’s financial condition and result of operations.

The business strategy of the Company includes growth through acquisition.  Recently completed and future acquisitions will be accompanied by the risks commonly encountered in acquisitions.  These risks include among other things: obtaining timely regulatory approval, the difficulty of integrating operations and personnel, the potential disruption of our ongoing business, the inability of the Company’s management to maximize its financial and strategic position, the inability to maintain uniform standards, controls, procedures and policies, and the impairment of relationships with employees and customers as a result of changes in ownership and management.  Further, the asset quality or other financial characteristics of a company may deteriorate after the acquisition agreement is signed or after the acquisition closes.

A portion of the Company’s loan portfolio is acquired and was not underwritten by the Company at origination.

At December 31, 2017, 26% of the loan portfolio was acquired and was not underwritten by the Company at origination, and therefore is not necessarily reflective of the Company’s historical credit risk experience. The Company performed extensive credit due diligence prior to each acquisition and marked the loans to fair value upon acquisition, with such fair valuation considering expected credit losses that existed at the time of acquisition. Additionally, the Company evaluates the expected cash flows of these loans on a quarterly basis. However, there is a risk that credit losses could be larger than currently anticipated, thus adversely affecting earnings.

The Company may be required to record impairment charges related to goodwill, other intangible assets and the investment portfolio.

The Company may be required to record impairment charges in respect to goodwill, other intangible assets and the investment portfolio.  Numerous factors, including lack of liquidity for resale of certain investment securities, absence of reliable pricing information for investment securities, the economic condition of state and local municipalities, adverse changes in the business climate, adverse actions by regulators, unanticipated changes in the competitive environment or a decision to change the operations or dispose of an operating unit could have a negative effect on the investment portfolio, goodwill or other intangible assets in future periods.

16

The Company’s financial statements are based, in part, on assumptions and estimates, which, if conditions change, could cause unexpected losses in the future.

Pursuant to accounting principles generally accepted in the United States, the Company is required to use certain assumptions and estimates in preparing its financial statements, including in determining credit loss reserves, mortgage repurchase liability and reserves related to litigation, among other items.  Certain of the Company’s financial instruments, including available-for-sale securities and certain loans, among other items, require a determination of their fair value in order to prepare the Company’s financial statements.  Where quoted market prices are not available, the Company may make fair value determinations based on internally developed models or other means which ultimately rely to some degree on management judgment.  Some of these and other assets and liabilities may have no direct observable price levels, making their valuation particularly subjective, as they are based on significant estimation and judgment.  In addition, sudden illiquidity in markets or declines in prices of certain loans and securities may make it more difficult to value certain balance sheet items, which may lead to the possibility that such valuations will be subject to further change or adjustment.  If assumptions or estimates underlying the Company’s financial statements are incorrect, it may experience material losses.

Financial services companies depend on the accuracy and completeness of information about customers and counterparties.

In deciding whether to extend credit or enter into other transactions, the Company may rely on information furnished by or on behalf of customers and counterparties, including financial statements, credit reports and other financial information. The Company may also rely on representations of those customers, counterparties or other third parties, such as independent auditors, as to the accuracy and completeness of that information. Reliance on inaccurate or misleading financial statements, credit reports or other information could have a material adverse impact on business and, in turn, the Company’s financial condition and results of operations.

The Company’s information systems may experience an interruption or security breach.

The Company relies heavily on communications and information systems to conduct its business.  The Company may be the subject of sophisticated and targeted attacks intended to obtain unauthorized access to assets or confidential information, destroy data, disable or degrade service, or sabotage systems, often through the introduction of computer viruses or malware, cyber-attacks and other means.  Any failure, interruption or breach in security of these systems could result in failures or disruptions in the Company’s online banking system, its general ledger, and its deposit and loan servicing and origination systems or other systems.  Furthermore, if personal, confidential or proprietary information of customers or clients in the Company’s possession were to be mishandled or misused, the Company could suffer significant regulatory consequences, reputational damage and financial loss.  Such mishandling or misuse could include circumstances where, for example, such information was erroneously provided to parties who are not permitted to have the information, either by fault of the Company’s systems, employees, or counterparties, or where such information was intercepted or otherwise inappropriately taken by third parties.  The Company has policies and procedures designed to prevent or limit the effect of the possible failure, interruption or security breach of its information systems; however, any such failure, interruption or security breach could adversely affect the Company’s business and results of operations through loss of assets or by requiring it to expend significant resources to correct the defect, as well as exposing the Company to customer dissatisfaction and civil litigation, regulatory fines or penalties or losses not covered by insurance.

We rely on third party vendors, which could expose the Company to additional cybersecurity risks.

Third party vendors provide key components of our business infrastructure, including certain data processing and information services. On behalf of the Company, third parties may transmit confidential, propriety information. Although the Company requires third party providers to maintain certain levels of information security, such providers may remain vulnerable to breaches, unauthorized access, misuse, computer viruses, or other malicious attacks that could ultimately compromise sensitive information. While the Company may contractually limit liability in connection with attacks against third party providers, the Company remains exposed to the risk of loss associated with such vendors. In addition, a number of the Company’s vendors are large national entities with dominant market presence in their respective fields. Their services could prove difficult to replace in a timely manner if a failure or other service interruption were to occur. Failures of certain vendors to provide contracted services could adversely affect the Company’s ability to deliver products and services to customers and cause the Company to incur significant expense.

17

The Company is exposed to fraud in many aspects of the services and products that it provides.

The Company offers a wide variety of products and services.  When account credentials and other access tools are not adequately protected, risks and potential costs may increase.  As (a) sales of these services and products expand, (b) those who are committing fraud become more sophisticated and more determined, and (c) banking services and product offerings expand, the Company’s operational losses could increase.

The Company may be adversely affected by the soundness of other financial institutions.

Financial services institutions are interrelated as a result of trading, clearing, counterparty, or other relationships.  The Company has exposure to many different industries and counterparties, and routinely executes transactions with counterparties in the financial services industry.  Many of these transactions expose the Company to credit risk in the event of a default by a counterparty or client.  In addition, credit risk may be exacerbated when the collateral held by the Company cannot be realized upon or is liquidated at prices not sufficient to recover the full amount of the credit or derivative exposure due to the Company. Any such losses could have a material adverse effect on the Company’s financial condition and results of operations.

The Company is or may become involved in lawsuits, legal proceedings, information-gathering requests, investigations, and proceedings by governmental agencies or other parties that may lead to adverse consequences.

As a participant in the financial services industry, many aspects of the Company’s business involve substantial risk of legal liability. The Company and its subsidiaries have been named or threatened to be named as defendants in various lawsuits arising from its or its subsidiaries’ business activities (and in some cases from the activities of acquired companies). In addition, from time to time, the Company is, or may become, the subject of governmental and self-regulatory agency information-gathering requests, reviews, investigations and proceedings and other forms of regulatory inquiry, including by bank regulatory agencies, the SEC and law enforcement authorities. The results of such proceedings could lead to delays in or prohibition to acquire other companies, significant penalties, including monetary penalties, damages, adverse judgments, settlements, fines, injunctions, restrictions on the way in which the Company conducts its business, or reputational harm.

Although the Company establishes accruals for legal proceedings when information related to the loss contingencies represented by those matters indicates both that a loss is probable and that the amount of loss can be reasonably estimated, the Company does not have accruals for all legal proceedings where it faces a risk of loss. In addition, due to the inherent subjectivity of the assessments and unpredictability of the outcome of legal proceedings, amounts accrued may not represent the ultimate loss to the Company from the legal proceedings in question. Thus, the Company’s ultimate losses may be higher than the amounts accrued for legal loss contingencies, which could adversely affect the Company’s financial condition and results of operations.

The Company continually encounters technological change and the failure to understand and adapt to these changes could have a negative impact on the business.

The financial services industry is continually undergoing rapid technological change with frequent introductions of new technology-driven products and services. The effective use of technology increases efficiency and enables financial institutions to better serve customers and to reduce costs. The Company’s future success depends, in part, upon its ability to address the needs of its customers by using technology to provide products and services that will satisfy customer demands, as well as to create additional efficiencies in the Company’s operations. Many of the Company’s competitors have substantially greater resources to invest in technological improvements. The Company may not be able to effectively implement new technology-driven products and services or be successful in marketing these products and services to its customers. Failure to successfully keep pace with technological changes affecting the financial services industry could have a material adverse impact on the Company’s financial condition and results of operations.

Trading activity in the Company’s common stock could result in material price fluctuations.

The market price of the Company’s common stock may fluctuate significantly in response to a number of other factors including, but not limited to:

· Changes in securities analysts’ expectations of financial performance;

· Volatility of stock market prices and volumes;

· Incorrect information or speculation;

· Changes in industry valuations;

· Variations in operating results from general expectations;

· Actions taken against the Company by various regulatory agencies;

· Changes in authoritative accounting guidance by the Financial Accounting Standards Board or other regulatory agencies;

· Changes in general domestic economic conditions such as inflation rates, tax rates, unemployment rates, oil prices, labor and healthcare cost trend rates, recessions, and changing government policies, laws and regulations; and

· Severe weather, natural disasters, acts of war or terrorism and other external events.

18

The Company’s ability to attract and retain qualified employees is critical to the success of its business, and failure to do so may have a materially adverse effect on the Company’s performance.

The Company’s employees are its most important resource, and in many areas of the financial services industry, competition for qualified personnel is intense.  The imposition on the Company or its employees of certain existing and proposed restrictions or taxes on executive compensation may adversely affect the Company’s ability to attract and retain qualified senior management and employees.  If the Company provides inadequate succession planning, is unable to continue to retain and attract qualified employees, the Company’s performance, including its competitive position, could have a materially adverse effect.

Item 1B. Unresolved Staff Comments

None

Item 2. Properties

The Company’s primary headquarters are located at 5790 Widewaters Parkway, Dewitt, New York, which is leased.  In addition, the Company has 263 properties located in the counties identified in the table on page 6, of which 160 are owned and 103 are under lease arrangements.  With respect to the Banking segment, the Company operates 225 full-service branches and 11 facilities for back office banking operations.  With respect to the Employee Benefit Services segment, the Company operates 16 customer service facilities, all of which are leased.  With respect to the All Other segment, the Company operates 11 customer service facilities, all of which are leased.  Some properties contain tenant leases or subleases.

Real property and related banking facilities owned by the Company at December 31, 2017 had a net book value of $83.0 million and none of the properties were subject to any material encumbrances.  For the year ended December 31, 2017, the Company paid $7.3 million of rental fees for facilities leased for its operations.  The Company believes that its facilities are suitable and adequate for the Company’s current operations.

Item 3. Legal Proceedings

The Company and its subsidiaries are subject in the normal course of business to various pending and threatened legal proceedings in which claims for monetary damages are asserted. As of December 31, 2017, management, after consultation with legal counsel, does not anticipate that the aggregate ultimate liability arising out of litigation pending or threatened against the Company or its subsidiaries will be material to the Company’s consolidated financial position. On at least a quarterly basis the Company assesses its liabilities and contingencies in connection with such legal proceedings. For those matters where it is probable that the Company will incur losses and the amounts of the losses can be reasonably estimated, the Company records an expense and corresponding liability in its consolidated financial statements. To the extent the pending or threatened litigation could result in exposure in excess of that liability, the amount of such excess is not currently estimable. The range of reasonably possible losses for matters where an exposure is not currently estimable or considered probable, beyond the existing recorded liabilities, is between $0 and $1 million in the aggregate. Although the Company does not believe that the outcome of pending litigation will be material to the Company’s consolidated financial position, it cannot rule out the possibility that such outcomes will be material to the consolidated results of operations for a particular reporting period in the future.

Item 4. Mine Safety Disclosures

Not Applicable

19

Item 4A.Executive Officers of the Registrant

The executive officers of the Company and the Bank who are elected by the Board of Directors are as follows:

Name	Age	Position
Mark E. Tryniski	57	Director, President and Chief Executive Officer.  Mr. Tryniski assumed his current position in August 2006. He served as Executive Vice President and Chief Operating Officer from March 2004 to July 2006 and as the Treasurer and Chief Financial Officer from June 2003 to March 2004. He previously served as a partner in the Syracuse office of PricewaterhouseCoopers LLP.
Scott Kingsley	53	Executive Vice President and Chief Financial Officer.  Mr. Kingsley joined the Company in August 2004 in his current position.  He served as Vice President and Chief Financial Officer of Carlisle Engineered Products, Inc., a subsidiary of the Carlisle Companies, Inc., from 1997 until joining the Company.
Brian D. Donahue	61	Executive Vice President and Chief Banking Officer.  Mr. Donahue assumed his current position in August 2004.  He served as the Bank’s Chief Credit Officer from February 2000 to July 2004 and as the Senior Lending Officer for the Southern Region of the Bank from 1992 until June 2004.
George J. Getman	61	Executive Vice President and General Counsel.  Mr. Getman assumed his current position in January 2008.  Prior to joining the Company, he was a partner with Bond, Schoeneck & King, PLLC and served as corporate counsel to the Company.

20

Part II

Item 5.  Market for the Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities

The Company’s common stock has been trading on the New York Stock Exchange under the symbol “CBU” since December 31, 1997.  Prior to that, the common stock traded over-the-counter on the NASDAQ National Market under the symbol “CBSI” beginning on September 16, 1986. There were 50,796,090 shares of common stock outstanding on January 31, 2018, held by approximately 4,031 registered shareholders of record. The following table sets forth the high and low closing prices for the common stock, and the cash dividends declared with respect thereto, for the periods indicated.  The prices do not include retail mark-ups, mark-downs or commissions.

Year / Qtr	High Price		Low Price		Quarterly Dividend
2017
4th	$	56.80	$	51.38	$	0.34
3rd	$	57.30	$	49.11	$	0.34
2nd	$	58.03	$	51.66	$	0.32
1st	$	62.32	$	51.71	$	0.32
2016
4th	$	62.24	$	46.07	$	0.32
3rd	$	48.11	$	39.96	$	0.32
2nd	$	42.18	$	36.78	$	0.31
1st	$	39.23	$	34.47	$	0.31

The Company has historically paid regular quarterly cash dividends on its common stock, and declared a cash dividend of $0.34 per share for the first quarter of 2018.  The Board of Directors of the Company presently intends to continue the payment of regular quarterly cash dividends on the common stock, as well as to make payment of regularly scheduled dividends on the trust preferred stock when due, subject to the Company's need for those funds.  However, because substantially all of the funds available for the payment of dividends by the Company are derived from the subsidiary Bank, future dividends will depend upon the earnings of the Bank, its financial condition, its need for funds and applicable governmental policies and regulations.

21

The following graph compares cumulative total shareholders returns on the Company’s common stock over the last five fiscal years to the S&P 600 Commercial Banks Index, the NASDAQ Bank Index, the S&P 500 Index, and the KBW Regional Banking Index. Total return values were calculated as of December 31 of each indicated year assuming a $100 investment on December 31, 2012 and reinvestment of dividends.

22

Equity Compensation Plan Information

The following table provides information as of December 31, 2017 with respect to shares of common stock that may be issued under the Company’s existing equity compensation plans.

Plan Category	Number of Securities to be Issued upon Exercise of Outstanding Options, Warrants and Rights (1)		Weighted-average Exercise Price of Outstanding Options, Warrants and Rights		Number of Securities Remaining Available For Future Issuance Under Equity Compensation Plans (excluding securities reflected in the first column)
Equity compensation plans approved by security holders:
2004 Long-term Incentive Plan		984,891	$	27.80		51,503
2014 Long-term Incentive Plan		954,278		33.19		1,653,934
Equity compensation plans not approved by security holders		0		0		0
Total		1,939,169	$	30.45		1,705,437

⁽¹⁾ The number of securities includes 230,873 shares of unvested restricted stock.

Stock Repurchase Program

At its December 2016 meeting, the Board approved a stock repurchase program authorizing the repurchase, at the discretion of senior management, of up to 2,200,000 shares of the Company’s common stock, in accordance with securities laws and regulations, during a twelve-month period starting January 1, 2017.  There were no treasury stock purchases made under this authorization in 2017.  At its December 2017 meeting, the Board approved a new stock repurchase program authorizing the repurchase, at the discretion of senior management, of up to 2,500,000 shares of the Company’s common stock, in accordance with securities laws and regulations, during a twelve-month period starting January 1, 2018.  Any repurchased shares will be used for general corporate purposes, including those related to stock plan activities.  The timing and extent of repurchases will depend on market conditions and other corporate considerations as determined at the Company’s discretion.

The following table presents stock purchases made during the fourth quarter of 2017:

Issuer Purchases of Equity Securities

Period	Total Number of Shares Purchased		Average Price Paid Per share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs		Maximum Number of Shares That May Yet be Purchased Under the Plans or Programs
October 1-31, 2017(1)		1,432	$	56.03		0		2,200,000
November 1-30, 2017		0		0		0		2,200,000
December 1-31, 2017 (1)		197		53.75		0		2,200,000
Total		1,629	$	55.77

⁽¹⁾Included in the common shares repurchased were 197 shares acquired by the Company in connection with satisfaction of tax withholding obligations on vested restricted stock issued pursuant to the employee benefit plan and 1,432 shares acquired in connection with the administration of the Company’s deferred compensation plans.  These shares were not repurchased as part of the publicly announced repurchase plan described above.

Item 6.  Selected Financial Data

The following table sets forth selected consolidated historical financial data of the Company as of and for each of the years in the five-year period ended December 31, 2017.  The historical information set forth under the captions “Income Statement Data” and “Balance Sheet Data” is derived from the audited financial statements while the information under the captions “Capital and Related Ratios”, “Selected Performance Ratios” and “Asset Quality Ratios” for all periods is unaudited.  All financial information in this table should be read in conjunction with the information contained in “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and with the Consolidated Financial Statements and the related notes thereto included elsewhere in this Annual Report on Form 10-K.

23

SELECTED CONSOLIDATED FINANCIAL INFORMATION

	Years Ended December 31,
(In thousands except per share data and ratios)	2017			2016			2015			2014			2013
Income Statement Data:
Loan interest income	$	253,949		$	211,467		$	187,743		$	185,527		$	188,197
Investment interest income		75,506			73,720			71,879			70,693			75,962
Interest expense		13,780			11,291			11,202			11,792			26,065
Net interest income		315,675			273,896			248,420			244,428			238,094
Provision for loan losses		10,984			8,076			6,447			7,178			7,992
Noninterest income		202,421			155,625			123,303			119,020			108,748
Gain (loss) on investment securities & early retirement of long-term borrowings, net		2			0			(4	)		0			(6,568	)
Acquisition expenses and litigation settlement		25,986			1,706			7,037			2,923			2,181
Other noninterest expenses		321,163			265,142			226,018			223,657			219,074
Income before income taxes		159,965			154,597			132,217			129,690			111,027
Net income		150,717			103,812			91,230			91,353			78,829
Diluted earnings per share		3.03			2.32			2.19			2.22			1.94
Balance Sheet Data:
Cash equivalents	$	19,652		$	24,243		$	21,931		$	12,870		$	11,288
Investment securities		3,081,379			2,784,392			2,847,940			2,512,974			2,218,725
Loans		6,256,757			4,948,562			4,801,375			4,236,206			4,109,083
Allowance for loan losses		(47,583	)		(47,233	)		(45,401	)		(45,341	)		(44,319	)
Intangible assets		825,088			480,844			484,146			386,973			390,499
Total assets		10,746,198			8,666,437			8,552,669			7,489,440			7,095,864
Deposits		8,444,420			7,075,954			6,873,474			5,935,264			5,896,044
Borrowings		485,896			248,370			403,446			440,122			244,010
Shareholders’ equity		1,635,315			1,198,100			1,140,647			987,904			875,812
Capital and Related Ratios:
Cash dividends declared per share	$	1.32		$	1.26		$	1.22		$	1.16		$	1.10
Book value per share		32.26			26.96			26.06			24.24			21.66
Tangible book value per share (1)		16.94			17.12			15.90			15.63			12.80
Market capitalization (in millions)		2,725			2,746			1,748			1,554			1,604
Tier 1 leverage ratio		10.00	%		10.55	%		10.32	%		9.96	%		9.29	%
Total risk-based capital to risk-adjusted assets		17.45	%		19.10	%		18.08	%		18.75	%		17.57	%
Tangible equity to tangible assets (1)		8.61	%		9.24	%		8.59	%		8.92	%		7.68	%
Dividend payout ratio		43.5	%		53.7	%		55.5	%		51.6	%		56.0	%
Period end common shares outstanding		50,696			44,437			43,775			40,748			40,431
Diluted weighted-average shares outstanding		49,665			44,720			41,605			41,232			40,726
Selected Performance Ratios:
Return on average assets		1.49	%		1.20	%		1.17	%		1.23	%		1.09	%
Return on average equity		10.21	%		8.57	%		8.87	%		9.65	%		9.04	%
Net interest margin		3.69	%		3.71	%		3.73	%		3.91	%		3.91	%
Noninterest revenues/operating revenues (FTE)		38.8	%		35.5	%		32.3	%		31.7	%		30.4	%
Efficiency ratio (2)		58.3	%		59.6	%		58.2	%		58.4	%		59.9	%
Asset Quality Ratios:
Allowance for loan losses/total loans		0.76	%		0.95	%		0.95	%		1.07	%		1.08	%
Nonperforming loans/total loans		0.44	%		0.48	%		0.50	%		0.56	%		0.54	%
Allowance for loan losses/nonperforming loans		173	%		199	%		190	%		190	%		201	%
Loan loss provision/net charge-offs		103	%		129	%		101	%		117	%		122	%
Net charge-offs/average loans		0.18	%		0.13	%		0.15	%		0.15	%		0.17	%

⁽¹⁾ The tangible book value per share and the tangible equity to tangible asset ratio excludes goodwill and identifiable intangible assets, adjusted for deferred tax liabilities generated from tax deductible goodwill.  The ratio is not a financial measurement required by accounting principles generally accepted in the United States of America.  However, management believes such information is useful to analyze the relative strength of the Company’s capital position and is useful to investors in evaluating Company performance (See Table 20 for Reconciliation of GAAP to Non-GAAP Measures).

⁽²⁾ Efficiency ratio provides a ratio of operating expenses to operating income.  It excludes intangible amortization, acquisition expenses, acquired non-impaired loan accretion and litigation settlement from expenses and gains and losses on investment securities & early retirement of long-term borrowings from income while adding a fully-taxable equivalent adjustment. The efficiency ratio is not a financial measurement required by accounting principles generally accepted in the United States of America.  However, the efficiency ratio is used by management in its assessment of financial performance specifically as it relates to noninterest expense control.  Management also believes such information is useful to investors in evaluating Company performance.

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Item 7.  Management’s Discussion and Analysis of Financial Condition and Results of Operations

This Management’s Discussion and Analysis of Financial Condition and Results of Operations (“MD&A”) primarily reviews the financial condition and results of operations of the Company for the past two years, although in some circumstances a period longer than two years is covered in order to comply with SEC disclosure requirements or to more fully explain long-term trends.  The following discussion and analysis should be read in conjunction with the Selected Consolidated Financial Information beginning on page 23 and the Company’s Consolidated Financial Statements and related notes that appear on pages 58 through 104.  All references in the discussion to the financial condition and results of operations refer to the consolidated position and results of the Company and its subsidiaries taken as a whole.

Unless otherwise noted, all earnings per share (“EPS”) figures disclosed in the MD&A refer to diluted EPS; interest income, net interest income, and net interest margin are presented on a fully tax-equivalent (“FTE”) basis, which is a non-GAAP measure.  The term “this year” and equivalent terms refer to results in calendar year 2017, “last year” and equivalent terms refer to calendar year 2016, and all references to income statement results correspond to full-year activity unless otherwise noted.

This MD&A contains certain forward-looking statements with respect to the financial condition, results of operations, and business of the Company.  These forward-looking statements involve certain risks and uncertainties.  Factors that may cause actual results to differ materially from those contemplated by such forward-looking statements are set herein under the caption “Forward-Looking Statements” on page 52.

Critical Accounting Policies

As a result of the complex and dynamic nature of the Company’s business, management must exercise judgment in selecting and applying the most appropriate accounting policies for its various areas of operations.  The policy decision process not only ensures compliance with the current generally accepted accounting principles (“GAAP”), but also reflects management’s discretion with regard to choosing the most suitable methodology for reporting the Company’s financial performance.  It is management’s opinion that the accounting estimates covering certain aspects of the business have more significance than others due to the relative importance of those areas to overall performance, or the level of subjectivity in the selection process.  These estimates affect the reported amounts of assets and liabilities as well as disclosures of revenues and expenses during the reporting period.  Actual results could differ from these estimates.  Management believes that the critical accounting estimates include:

· Acquired loans – Acquired loans are initially recorded at their acquisition date fair values based on a discounted cash flow methodology that involves assumptions and judgments as to credit risk, prepayment risk, liquidity risk, default rates, loss severity, payment speeds, collateral values and discount rate.

Acquired loans deemed impaired at acquisition are recorded in accordance with ASC 310-30.  The excess of undiscounted cash flows expected at acquisition over the estimated fair value is referred to as the accretable discount. The difference between contractually required payments at acquisition and the undiscounted cash flows expected to be collected at acquisition is referred to as the non-accretable discount, which represents estimated future credit losses and other contractually required payments that the Company does not expect to collect. Subsequent decreases in expected cash flows are recognized as impairments through a charge to the provision for loan losses resulting in an increase in the allowance for loan losses. Subsequent improvements in expected cash flows result in a recovery of previously recorded allowance for loan losses or a reversal of a corresponding amount of the non-accretable discount, which the Company then reclassifies as an accretable discount that is recognized into interest income over the remaining life of the loans using the interest method.

For acquired loans that are not deemed impaired at acquisition, the difference between the acquisition date fair value and the outstanding balance represents the fair value adjustment for a loan, and includes both credit and interest rate considerations. Subsequent to the purchase date, the methods used to estimate the allowance for loan losses for the acquired non-impaired loans is consistent with the policy described below.  However, for loans collectively evaluated for impairment, the Company compares the net realizable value of the loans to the carrying value.  The carrying value represents the net of the loan’s unpaid principal balance and the remaining purchase discount or premium that has yet to be accreted into interest income.  When the carrying value exceeds the net realizable value, an allowance for loan losses is recognized. For loans individually evaluated for impairment, a provision is recorded when the required allowance exceeds any remaining discount on the loan.

· Allowance for loan losses – The allowance for loan losses reflects management’s best estimate of probable loan losses in the Company’s loan portfolio. Determination of the allowance for loan losses is inherently subjective.  It requires significant estimates, including the amounts and timing of expected future cash flows on impaired loans, appraisal values of underlying collateral for collateralized loans, and the amount of estimated losses on pools of homogeneous loans which is based on historical loss experience, expected duration and consideration of current economic trends, all of which may be susceptible to significant change.

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· Investment securities – Investment securities can be classified as held-to-maturity, available-for-sale or trading.  The appropriate classification is based partially on the Company’s ability to hold the securities to maturity and largely on management’s intentions with respect to either holding or selling the securities.  The classification of investment securities is significant since it directly impacts the accounting for unrealized gains and losses on securities.  Unrealized gains and losses on available-for-sale securities are recorded in accumulated other comprehensive income or loss, as a separate component of shareholders’ equity, and do not affect earnings until realized.  The fair values of investment securities are generally determined by reference to quoted market prices, where available.  If quoted market prices are not available, fair values are based on quoted market prices of comparable instruments, or a discounted cash flow model using market estimates of interest rates and volatility.  Investment securities with significant declines in fair value are evaluated to determine whether they should be considered other-than-temporarily impaired (“OTTI”).  An unrealized loss is generally deemed to be other-than-temporary and a credit loss is deemed to exist if the present value of the expected future cash flows is less than the amortized cost basis of the debt security.  The credit loss component of an other-than-temporary impairment write-down is recorded in current earnings, while the remaining portion of the impairment loss is recognized in other comprehensive income (loss), provided the Company does not intend to sell the underlying debt security, and it is not likely that the Company will be required to sell the debt security prior to recovery of the full value of its amortized cost basis.  During 2013, the Company sold certain held-to-maturity securities and consequently did not use the held-to-maturity classification in 2014, 2015, 2016 or 2017.

· Retirement benefits – The Company provides defined benefit pension benefits to eligible employees and retirees and post-retirement health and life insurance benefits to certain eligible retirees.  The Company also provides deferred compensation and supplemental executive retirement plans for selected current and former employees.  Expense under these plans is charged to current operations and consists of several components of net periodic (benefit) cost based on various actuarial assumptions regarding future experience under the plans, including, but not limited to, discount rate, rate of future compensation increases, mortality rates, future health care costs and the expected return on plan assets.

· Provision for income taxes – The Company is subject to examinations from various taxing authorities.  Such examinations may result in challenges to the tax return treatment applied by the Company to specific transactions.  Management believes that the assumptions and judgments used to record tax-related assets or liabilities have been appropriate.  Should tax laws change or the taxing authorities determine that management’s assumptions were inappropriate, an adjustment may be required which could have a material effect on the Company’s results of operations.

· Intangible assets – As a result of acquisitions, the Company carries goodwill and identifiable intangible assets.  Goodwill represents the cost of acquired companies in excess of the fair value of net assets at the acquisition date.  Goodwill is evaluated at least annually, or when business conditions suggest impairment may have occurred.  Should impairment occur, goodwill will be reduced to its revised carrying value through a charge to earnings.  Core deposits and other identifiable intangible assets are amortized to expense over their estimated useful lives.  The determination of whether or not impairment exists is based upon discounted cash flow modeling techniques that require management to make estimates regarding the amount and timing of expected future cash flows.  It also requires them to select a discount rate that reflects the current return requirements of the market in relation to present risk-free interest rates, required equity market premiums, and company-specific performance and risk metrics, all of which are susceptible to change based on changes in economic and market conditions and other factors.  Future events or changes in the estimates used to determine the carrying value of goodwill and identifiable intangible assets could have a material impact on the Company’s results of operations.

A summary of the accounting policies used by management is disclosed in Note A, “Summary of Significant Accounting Policies”, starting on page 63.

Supplemental Reporting of Non-GAAP Results of Operations

The Company also provides supplemental reporting of its results on a “net adjusted” or “tangible” basis, from which it excludes the after-tax effect of amortization of core deposit and other intangible assets (and the related goodwill, core deposit intangible and other intangible asset balances, net of applicable deferred tax amounts), accretion on non-impaired purchased loans, and expenses associated with acquisitions.  Although “adjusted net income” as defined by the Company is a non-GAAP measure, the Company’s management believes this information helps investors understand the effect of acquisition activity in its reported results.  Reconciliations of GAAP amounts with corresponding non-GAAP amounts are presented in Table 20.

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Executive Summary

The Company’s business philosophy is to operate as a diversified financial services enterprise providing a broad array of banking and other financial services to retail, commercial and municipal customers.  The Company’s banking subsidiary is Community Bank, N.A. (the “Bank” or “CBNA”).  The Company also provides employee benefit related services via its Benefit Plans Administrative Services, Inc. (“BPAS”) subsidiary, and wealth management and insurance-related services.

The Company’s core operating objectives are: (i) grow the branch network, primarily through a disciplined acquisition strategy and certain selective de novo expansions, (ii) build profitable loan and deposit volume using both organic and acquisition strategies, (iii) increase the noninterest component of total revenue through development of banking-related fee revenue, growth in existing financial services business units, and the acquisition of additional financial services and banking businesses, and (iv) utilize technology to deliver customer-responsive products and services and to improve efficiencies.

Significant factors reviewed by management to evaluate achievement of the Company’s operating objectives and its operating results and financial condition include, but are not limited to:  net income and earnings per share; return on assets and equity; net interest margins; noninterest revenues; noninterest expenses; asset quality; loan and deposit growth; capital management; performance of individual banking and financial services units; performance of specific product lines and customers; liquidity and interest rate sensitivity; enhancements to customer products and services and their underlying performance characteristics; technology advancements; market share; peer comparisons; and the performance of recently acquired businesses.

On January 1, 2017, the Company, through its subsidiary, OneGroup, acquired certain assets of Benefits Advisory Service, Inc. (“BAS”), a benefits consulting group headquartered in Forest Hills, New York.  The Company paid $1.2 million in cash to acquire the assets of BAS and recorded intangible assets of $1.2 million in conjunction with the acquisition.

On February 3, 2017, the Company completed its acquisition of Northeast Retirement Services, Inc. (“NRS”) and its subsidiary Global Trust Company, Inc. (“GTC”), headquartered in Woburn, Massachusetts, for $148.6 million in Company stock and cash.  NRS was a privately held corporation focused on providing institutional transfer agency, master recordkeeping services, custom target date fund administration, trust product administration and customized reporting services to institutional clients.  Its wholly-owned subsidiary, GTC, is chartered in the State of Maine as a non-depository trust company and provides fiduciary services for collective investment trusts and other products.  The acquisition of NRS and GTC, hereafter referred to collectively as NRS, will strengthen and complement the Company’s existing employee benefit services businesses.  Upon the completion of the merger, NRS became a wholly-owned subsidiary of BPAS and operates as Northeast Retirement Services, LLC, a Delaware limited liability company.  This transaction resulted in the acquisition of $36.1 million in net tangible assets, principally cash and certificates of deposit, $60.2 million in customer list intangibles that will be amortized over 10 years, the creation of a $24.2 million deferred tax liability associated with the customer list intangible and $76.5 million in goodwill.

On March 1, 2017, the Company, through its subsidiary, OneGroup, completed its acquisition of certain assets of Dryfoos Insurance Agency, Inc. (“Dryfoos”), an insurance agency headquartered in Hazleton, Pennsylvania.  The Company paid $3.0 million in cash to acquire the assets of Dryfoos, and recorded goodwill in the amount of $1.7 million and other intangible assets of $1.7 million in conjunction with the acquisition.

On May 12, 2017, the Company completed its acquisition of Merchants Bancshares, Inc. (“Merchants”), parent company of Merchants Bank, headquartered in South Burlington, Vermont, for $345.2 million in Company stock and cash, comprised of $82.9 million in cash and the issuance of 4.68 million shares of common stock.  The acquisition extends the Company’s footprint into the Vermont and Western Massachusetts markets with the addition of 31 branch locations in Vermont and one location in Massachusetts.  This transaction resulted in the acquisition of $2.0 billion of assets, including $1.49 billion of loans and $370.6 million of investment securities, as well as $1.45 billion of deposits and $189.0 million in goodwill.

On November 17, 2017, the Company, through its subsidiary, CISI, completed its acquisition of certain assets of Northeast Capital Management, Inc. (“NECM”), a financial services business headquartered in Wilkes Barre, Pennsylvania.  The Company agreed to pay $1.2 million in cash, including a $0.2 million contingent payment based on certain customer retention objectives, to acquire a customer list from NECM, and recorded a $1.2 million customer list intangible asset in conjunction with the acquisition.

On December 4, 2017, the Company, through its subsidiary, OneGroup, completed its acquisition of Gordon B. Roberts Agency, Inc. (“GBR”), an insurance agency headquartered in Oneonta, New York for $3.7 million in Company stock and cash, comprised of $1.35 million in cash and the issuance of 0.04 million shares of common stock.  The transaction resulted in the acquisition of $0.6 million of assets, $0.7 million of other liabilities, goodwill in the amount of $2.2 million and other intangible assets of $1.6 million.

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The Company reported net income and earnings per share for the year ended December 31, 2017 that were 45.2% and 30.6%, respectively, above the prior year amounts.  The increase in net income was due primarily to the earnings generated by expanded business activities from the Merchants and NRS acquisitions combined with the impact of the recently enacted Tax Cuts and Jobs Act of 2017 (“Tax Cuts and Jobs Act”) that resulted in a $38.0 million one-time gain from the revaluation of net deferred tax liabilities in the fourth quarter.  Contributing to the increase in net income was an increase in net interest income, higher noninterest income and a lower effective tax rate.  Partially offsetting these items were an increase in the provision for loan losses, increased operating expenses, and an increase in weighted average diluted shares outstanding, primarily attributable to shares issued in the Merchants, NRS and GBR acquisitions.  Net income adjusted to exclude acquisition expenses, amortization of intangibles, acquired non-impaired loan accretion and the impact of the Tax Cuts and Jobs Act, increased $32.1 million, or 30.1%, compared to the prior year.  Earnings per share adjusted to exclude acquisition expenses, amortization of intangibles, acquired non-impaired loan accretion and the impact of the Tax Cuts and Jobs Act, of $2.80 increased $0.41, or 17%, compared to the prior year.  See Table 20 for Reconciliation of GAAP to Non-GAAP Measures.

The Company experienced year-over-year growth in average interest-earning assets, primarily reflective of the Merchants acquisition completed in May 2017.  Average deposits increased in 2017 as compared to 2016, reflective of organic growth in core deposits and the impact of the Merchants acquisition.  Average external borrowings in 2017 increased from 2016 reflective of securities sold under an agreement to repurchase, subordinated debt held by an unconsolidated subsidiary and long-term debt acquired in the Merchants transaction.

Asset quality in 2017 remained stable and favorable in comparison to averages for peer financial organizations.  As compared to the end of 2016, loan nonperforming ratios and the delinquency ratio at December 31, 2017 were improved while the full year loan net charge-off ratio was up a modest amount year-over-year.

Net Income and Profitability

Net income for 2017 was $150.7 million, an increase of $46.9 million, or 45.2%, from 2016’s earnings.  Earnings per share for 2017 was $3.03, up $0.71, or 30.6%, from 2016’s results.  The 2017 results included $26.0 million, or $0.37 per share, of acquisition expenses primarily related to the Merchants and NRS acquisitions.  The 2016 results included $1.7 million, or $0.03 per share, of acquisition expenses related to the Merchants and NRS acquisitions.  Net income adjusted to exclude acquisition expenses, amortization of intangibles, acquired non-impaired loan accretion and the impact of the Tax Cuts and Jobs Act, increased $32.1 million, or 30.1%, compared to the prior year.  Earnings per share adjusted to exclude acquisition expenses, amortization of intangibles, acquired non-impaired loan accretion and the impact of the Tax Cuts and Jobs Act, of $2.80 increased $0.41, or 17%, compared to the prior year.  See Table 20 for Reconciliation of GAAP to Non-GAAP Measures.

Net income for 2016 was $103.8 million, an increase of $12.6 million, or 13.8%, from 2015’s earnings, while earnings per share for 2016 was $2.32, up $0.13, or 5.9%, from 2015’s results due primarily to the acquisition of Oneida in December 2015.  The 2016 results included the aforementioned acquisition expenses.

Table 1: Condensed Income Statements

	Years Ended December 31,
(000’s omitted, except per share data)	2017		2016		2015			2014		2013
Net interest income	$	315,675	$	273,896	$	248,420		$	244,428	$	238,094
Provision for loan losses		10,984		8,076		6,447			7,178		7,992
Gain/(Loss) on sales of investment securities, net		2		0		(4	)		0		80,768
Loss on debt extinguishments		0		0		0			0		87,336
Noninterest income		202,421		155,625		123,303			119,020		108,748
Acquisition expenses and litigation settlement		25,986		1,706		7,037			2,923		2,181
Other noninterest expenses		321,163		265,142		226,018			223,657		219,074
Income before taxes		159,965		154,597		132,217			129,690		111,027
Income taxes		9,248		50,785		40,987			38,337		32,198
Net income	$	150,717	$	103,812	$	91,230		$	91,353	$	78,829
Diluted weighted average common shares outstanding		49,665		44,720		41,605			41,232		40,726
Diluted earnings per share	$	3.03	$	2.32	$	2.19		$	2.22	$	1.94

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The Company operates in three business segments: Banking, Employee Benefit Services and All Other.  The banking segment provides a wide array of lending and depository-related products and services to individuals, businesses and municipal enterprises.  In addition to these general intermediation services, the Banking segment provides treasury management solutions, capital financing products and payment processing services.  Employee Benefit Services, consisting of BPAS and its subsidiaries, provides the following on a national basis: employee benefit trust services; collective investment fund; fund administration, transfer agency; retirement plan and VEBA/HRA and health savings account plan administration services; actuarial services; and healthcare consulting services.  BPAS services approximately 3,800 retirement plans and more than 400,000 plan participants.  In addition, BPAS employs nearly 350 professionals, and operates from 11 offices located in Boston, New York, New Jersey, Pennsylvania, Texas and Puerto Rico.  The All Other segment is comprised of wealth management and insurance services.  Wealth management activities include trust services provided by the personal trust unit of CBNA, investment products and services provided by CISI and The Carta Group, and asset advisory services provided by Nottingham.  The insurance services activities include the offerings of personal and commercial property insurance and other risk management products and services provided by OneGroup.  For additional financial information on the Company’s segments, refer to Note U – Segment Information in the Notes to Consolidated Financial Statements.

The primary factors explaining 2017 earnings performance are discussed in the remaining sections of this document and are summarized as follows:

BANKING

· Net interest income increased $41.5 million, or 15.2%.  This was the result of a $1.16 billion increase in average interest earning assets, partially offset by a $647.8 million increase in average interest-bearing liabilities and a two basis point increase in the average rate on interest-bearing liabilities.  Average loans grew $936.5 million driven by the Merchants acquisition.  Also contributing to the growth in interest income was a $219.5 million increase in the average book value of investments, including cash equivalents, primarily due to investments acquired in the Merchants transaction, partially offset by a 20 basis-point decrease in the average yield on investments.  Average interest-bearing deposits increased $539.8 million due to the Merchants acquisition and organic core deposit growth, partially offset by the continued trend of declining time deposit balances.  Borrowing interest expense increased year-over-year as a result of an increase in average balances of $108.0 million, or 39.7%, due to external borrowings acquired with Merchants, and a blended rate that was five basis points higher than the prior year.

· The loan loss provision of $11.0 million increased $2.9 million, or 36.0%, from the prior year level.  Net charge‑offs of $10.6 million were $4.4 million more than 2016, primarily due to a $3.1 million partial charge-off of a single commercial relationship in the fourth quarter of 2017.  This resulted in an annual net charge-off ratio (net charge-offs / total average loans) of 0.18%, which was five basis points higher than the prior year.  Year-end nonperforming loans as a percentage of total loans decreased four basis points and nonperforming assets as a percentage of loans and other real estate owned decreased five basis points compared to December 31, 2016 levels.  Additional information on trends and policy related to asset quality is provided in the asset quality section on pages 43 through 47.

· Banking noninterest income for 2017 of $73.3 million increased by $7.3 million from 2016’s level, primarily due to new deposit relationships from both acquired and organic sources, increased debit card-related revenues and higher deposit service fees, partially offset by a decrease in other banking revenues related to a nonrecurring insurance-related gain recognized in 2016.

· Total banking noninterest expenses, including acquisition expenses, increased $54.5 million, or 28.1%, in 2017 to $248.5 million, primarily reflective of expenses related to an expanded branch network and other acquired activities from the Merchants acquisition, and continued investment in risk management capabilities and technology and data processing costs.  Excluding acquisition expenses, banking noninterest expenses increased $31.0 million, or 16.0%, again reflective of expanded operations resulting from the Merchants acquisition.

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EMPLOYEE BENEFIT SERVICES

· Employee benefit services noninterest revenue for 2017 of $82.7 million increased $34.5 million, or 71.4%, from the prior year level, due to the combination of expanded business activities from the NRS acquisition and new client generation.

· Employee benefit services noninterest expenses for 2017 totaled $60.9 million.  This represented an increase from 2016 of $23.2 million, or 61.3%, and was attributable to the expanded business operations from the NRS acquisition and the continued buildout of resources to support an expanding revenue base.

ALL OTHER (WEALTH MANAGEMENT AND INSURANCE SERVICES)

· Wealth management and insurance services noninterest income for 2017 was $49.2 million; an increase of $5.5 million from the prior year level.  The increase was due to the additional customers generated by both organic and acquired growth sources, including the expansion of operations resulting from the BAS, Dryfoos, GBR and NECM acquisitions.

· Wealth management and insurance services noninterest expenses of $40.6 million increased $3.1 million from 2016 primarily due to increased personnel costs associated with the aforementioned organic and acquired growth.

Selected Profitability and Other Measures

Return on average assets, return on average equity, dividend payout and equity to asset ratios for the years indicated are as follows:

Table 2: Selected Ratios

	2017			2016			2015
Return on average assets		1.49	%		1.20	%		1.17	%
Return on average equity		10.21	%		8.57	%		8.87	%
Dividend payout ratio		43.5	%		53.7	%		55.5	%
Average equity to average assets		14.63	%		13.99	%		13.16	%

As displayed in Table 2, the return on average assets ratio and the return on average equity ratio increased in 2017, as compared to 2016.  The increase in return on average assets and return on average equity was the result of an increase in net income, reflective of expanded activities from the Merchants and NRS transactions and the impact of the recently enacted Tax Cuts and Jobs Act, which outpaced the increase in average assets.  The return on average assets ratio increased in 2017 while the return on average equity ratio decreased in 2016, as compared to 2015.  The increase in return on average assets in 2016 was the result of an increase in net income, reflective of the full year impact of the Oneida transaction and a decrease in acquisition expenses, which outpaced the increase in average assets.  The decrease in the return on average equity ratio in 2016 was the result of the aforementioned increase in net income being outpaced by the increase in average equity, due primarily to the full year impact of the issuance of common stock as consideration in the Oneida transaction, a higher average after tax investment market value adjustment and strong earnings retention.  The return on average assets adjusted to exclude acquisition expenses, amortization of intangibles, acquired non-impaired loan accretion and the impact of the Tax Cuts and Jobs Act increased 15 basis points to 1.38% in 2017, as compared to 1.23% in 2016.  The return on average equity adjusted to exclude acquisition expenses, amortization of intangibles, acquired non-impaired loan accretion and the impact of the Tax Cuts and Jobs Act increased 60 basis points to 9.41% in 2017, from 8.81% in 2016.  See Table 20 for Reconciliation of GAAP to Non-GAAP Measures.

The dividend payout ratio for 2017 decreased 10.2% from 2016 as the 45.2% increase in net income from 2016 outweighed the 17.6% increase in dividends declared.  The increase in dividends declared in 2017 was a result of a 4.8% increase in the dividends declared per share, an increase in the shares outstanding due to the issuance of shares as partial consideration in the Merchants, NRS and GBR transactions and the issuance of shares in connection with the administration of the Company’s 401(k) plan and employee stock plan.  The dividend payout ratio for 2016 decreased 1.8% from 2015 as net income increased 13.8% from 2015 while dividends declared increased 10.0%, a result of a 3.3% increase in the dividends declared per share in addition to an increase in the shares outstanding due to the issuance of shares as partial consideration in the Oneida transaction in late 2015 and the issuance of shares in connection with the administration of the Company’s 401(k) plan and employee stock plan.

The average equity to average assets ratio continued to increase as the growth in common shareholders’ equity outpaced the growth in assets.  During 2017, average equity increased at a rate of 21.8% while average assets increased at a rate of 16.5%, while in 2016 average equity rose 17.8% and average assets grew 10.8% in comparison to 2015.

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Net Interest Income

Net interest income is the amount by which interest and fees on earning assets (loans, investments and cash equivalents) exceeds the cost of funds, which consists primarily of interest paid to the Company's depositors and interest on external borrowings.  Net interest margin is the difference between the yield on interest earning assets and the cost of interest-bearing liabilities as a percentage of earning assets.

As disclosed in Table 3, net interest income (with nontaxable income converted to a fully tax-equivalent basis) totaled $325.1 million in 2017, an increase of $41.2 million, or 14.5%, from the prior year.  The increase is a result of a $1.16 billion, or 15.1%, increase in average interest-earning assets, partially offset by a one basis point decline in the average yield on interest-earning assets, a $647.8 million increase in average interest-bearing liabilities, and a two basis point increase in the average rate on interest-bearing liabilities.  As reflected in Table 4, the favorable impact of the increase in interest-earning assets ($44.4 million) was partially offset by the unfavorable impact of the decrease in the yield ($0.7 million), the increase in interest-bearing liabilities ($1.3 million), and the higher rate on interest-bearing liabilities ($1.2 million).

The 2017 net interest margin decreased two basis points to 3.69% from the 3.71% reported in 2016.  The decrease was attributable to a one basis point decrease in the earning-asset yield combined with a two basis point increase in the cost of interest-bearing liabilities.  The 4.39% yield on loans increased five basis points in 2017 as compared to 4.34% in 2016, due in part to incremental acquired loan accretion on the Merchants portfolio.  The yield on investments, including cash equivalents, decreased from 2.99% in 2016 to 2.79% in 2017.  This lower yield on investments is reflective of maturing higher rate investments being replaced with lower-yielding securities and interest-earning cash, as well as the effect certain changes in state tax rates had on the fully tax-equivalent adjustment.  The cost of interest-bearing liabilities was 0.22% during 2017 as compared to 0.20% for 2016.  The increased cost primarily reflects the increase in the average rate paid on external borrowings in 2017.

The net interest margin in 2016 decreased two basis points to 3.71% from the 3.73% reported in 2015.  The decrease was attributable to a four basis point decrease in the earning-asset yield, partially offset by a one basis point decrease in the cost of interest-bearing liabilities.  The 4.34% yield on loans decreased eight basis points in 2016 as compared to 4.42% in 2015, due to new loan volume for certain products carrying lower yields than the loans maturing or being prepaid in the continued low rate environment.  The yield on investments, including cash equivalents, decreased from 3.05% in 2015 to 2.99% in 2016.  This is reflective of the purchase of lower-yielding securities at various times throughout the last 24 months, as well as the effect certain changes in state tax rates had on the fully tax-equivalent adjustment.  The cost of interest-bearing liabilities was 0.20% during 2016 as compared to 0.21% for 2015.  The decreased cost primarily reflects the shift of customer deposits from higher cost time and money market deposits into non-interest bearing and lower cost checking and savings.

As shown in Table 3, total FTE-basis interest income increased by $43.7 million, or 14.8%, in 2017 in comparison to 2016. Table 4 indicates that a higher average earning-asset balance created $44.4 million of incremental interest income.  As mentioned previously, this was partially offset by a lower average yield on earning assets that had a negative impact of $0.7 million.  Average loans increased $936.5 million, or 19.2%, in 2017, primarily a result of acquired growth, with the Merchants acquisition accounting for $899.8 million of the total growth.  FTE-basis loan interest income and fees increased $43.2 million, or 20.4%, in 2017 as compared to 2016, attributable to the higher average balances and a five basis point increase in the loan yield.

Investment interest income (FTE basis) in 2017 was $0.5 million, or 0.6%, higher than the prior year as a result of a $219.5 million, or 7.9%, higher average book basis balance (including cash equivalents) for 2017 versus the prior year.  This was partially offset by a 20 basis point decrease in the average investment yield from 2.99% to 2.79%.  During most of 2017, market interest rates continued to be low, and as a result, cash flows from higher rate maturing investments were reinvested at lower interest rates or were used to pay down overnight borrowings.

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Total interest income in 2016 increased $23.1 million, or 8.5%, from 2015’s level.  Table 4 indicates that the higher average earning-asset balance created $25.8 million of incremental interest income, partially offset by a lower average yield on earning assets that had an impact of $2.7 million.  Average loans increased $593.8 million, or 13.8%, in 2016, a result of organic and acquired growth in all loan portfolios, with the Oneida acquisition accounting for $364.2 million of the total growth.  FTE-basis loan interest income and fees increased $22.5 million, or 11.9%, in 2016 as compared to 2015, attributable to the higher average balances, partially offset by an eight basis point decrease in the loan yield.  On a FTE basis, investment interest income, including interest on cash equivalents, totaled $83.1 million in 2016, $0.6 million, or 0.7%, higher than the prior year as a result of a $74.6 million, or 2.8%, higher average book basis balance (including cash equivalents) for 2016 versus the prior year.  This was partially offset by a six basis point decrease in the average investment yield from 3.05% to 2.99% including the impact of changes in state tax structures.  During most of 2016, market interest rates continued to be low, and as a result, cash flows from higher rate maturing investments were reinvested at lower yields.  The investments purchased during 2016 had a weighted average yield of 2.27% as compared to 2015 purchases which had a weighted average yield of 2.46%.

Total interest expense increased by $2.5 million, or 22.0%, to $13.8 million in 2017.  As shown in Table 4, higher interest rates on interest-bearing liabilities resulted in an increase in interest expense of $1.2 million, while higher deposit balances resulted in a $1.3 million increase in interest expense.  Interest expense as a percentage of average earning assets for 2017 increased one basis point to 0.16%.  The rate on interest-bearing deposits of 0.13% was consistent with the prior year as rates have been held relatively steady in all interest-bearing categories throughout 2017 and 2016, the deposit mix has continued to shift towards a lower proportion of time deposit products.  The rate on external borrowings increased five basis points to 1.51% in 2017, a result of lower-rate overnight FHLB borrowings becoming a smaller proportion of this funding component.  Total average funding balances (deposits and borrowings) in 2017 increased $1.14 billion, or 15.6%.  Average deposits increased $1.03 billion, of which approximately $862.8 million was attributable to the Merchants acquisition, with the remaining $166.8 million attributable to organic deposit growth.  Consistent with the Company’s funding mix objective and customers’ unwillingness to commit to less liquid instruments in the continued low rate environment, average core deposit balances increased $1.01 billion to 90.5% of total average deposits compared to 89.3% in 2016, while time deposits increased at a slower rate of $14.7 million year-over-year, representing 9.5% of total average deposits for 2017 compared to 10.7% in 2016.  Average external borrowings increased $108.0 million in 2017 as compared to the prior year, due to securities sold under an agreement to repurchase, short-term advances, subordinated debt held by unconsolidated subsidiary trusts and long-term debt assumed as part of the Merchants transaction that added $187.6 million in average borrowings, partially offset by a decrease in average FHLB borrowings of $79.6 million.

Total interest expense increased by $0.1 million to $11.3 million in 2016 as compared to 2015.  As shown in Table 4, lower interest rates on interest-bearing liabilities resulted in a decrease in interest expense of $0.8 million, while higher deposit balances resulted in a $0.9 million increase in interest expense.  Interest expense as a percentage of average earning assets for 2016 decreased one basis point to 0.15%.  The rate on interest-bearing deposits decreased two basis points to 0.13% as rates have held relatively steady in all interest-bearing categories throughout 2016 and 2015, and deposit mix moved to a lower proportion of time deposit products.  The rate on external borrowings increased 64 basis points to 1.46% in 2016, a result of lower-rate overnight FHLB borrowings becoming a smaller proportion of this funding component.  Total average funding balances (deposits and borrowings) in 2016 increased $635.6 million, or 9.5%.  Average deposits increased $877.5 million, of which approximately $654.1 million was attributable to the Oneida acquisition, with the remaining $223.4 million attributable to organic deposit growth.  Consistent with the Company’s funding mix objective and customers’ unwillingness to commit to less liquid instruments in the low rate environment, average core deposit balances increased $864.3 million to 89.3% of total average deposits compared to 88.0% in 2015, while time deposits increased at a slower rate of $13.2 million year-over-year representing 10.7% of total average deposits for 2016 compared to 12.0% in 2015.  Average external borrowings decreased $241.9 million in 2016 as compared to the prior year, reflective of the pay down of overnight FHLB borrowings with liquidity from the Oneida acquisition and organic deposit growth.

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The following table sets forth information related to average interest-earning assets and interest-bearing liabilities and their associated yields and rates for the years ended December 31, 2017, 2016 and 2015.  Interest income and yields are on a fully tax-equivalent basis using marginal income tax rates of 37.7% in 2017, 38.2% in 2016 and 38.3% in 2015.  Average balances are computed by totaling the daily ending balances in a period and dividing by the number of days in that period.  Loan interest income and yields include loan fees and acquired loan accretion.  Average loan balances include acquired loan purchase discounts and premiums, nonaccrual loans and loans held for sale.

Table 3: Average Balance Sheet

	Year Ended December 31, 2017							Year Ended December 31, 2016							Year Ended December 31, 2015
(000's omitted except yields and rates)	Average Balance		Interest		Avg. Yield/Rate Paid			Average Balance		Interest		Avg. Yield/Rate Paid			Average Balance		Interest		Avg. Yield/Rate Paid
Interest-earning assets:
Cash equivalents	$	38,545	$	385		1.00	%	$	19,062	$	89		0.47	%	$	13,543	$	32		0.23	%
Taxable investment securities (1)		2,440,215		59,774		2.45	%		2,177,589		56,113		2.58	%		2,071,095		53,282		2.57	%
Nontaxable investment securities (1)		517,408		23,499		4.54	%		579,986		26,924		4.64	%		617,418		29,205		4.73	%
Loans (net of unearned discount)(2)		5,818,367		255,212		4.39	%		4,881,905		212,022		4.34	%		4,288,091		189,507		4.42	%
Total interest-earning assets		8,814,535		338,870		3.84	%		7,658,542		295,148		3.85	%		6,990,147		272,026		3.89	%
Noninterest-earning assets		1,274,680							1,001,525							824,417
Total assets	$	10,089,215						$	8,660,067						$	7,814,564
Interest-bearing liabilities:
Interest checking, savings and money market deposits	$	5,237,282		4,854		0.09	%	$	4,712,212		4,121		0.09	%	$	4,053,761		3,598		0.09	%
Time deposits		765,666		3,177		0.41	%		750,944		3,204		0.43	%		737,734		3,373		0.46	%
Repurchase agreements		172,395		739		0.43	%		0		0		0.00	%		0		0		0.00	%
FHLB borrowings		92,307		1,106		1.20	%		169,769		1,017		0.60	%		411,694		1,694		0.41	%
Subordinated debt held by unconsolidated subsidiary trusts		115,231		3,904		3.39	%		102,158		2,949		2.89	%		102,133		2,537		2.48	%
Total interest-bearing liabilities		6,382,881		13,780		0.22	%		5,735,083		11,291		0.20	%		5,305,322		11,202		0.21	%
Noninterest-bearing liabilities:
Noninterest checking deposits		2,048,414							1,558,548							1,352,683
Other liabilities		182,159							154,916							128,521
Shareholders' equity		1,475,761							1,211,520							1,028,038
Total liabilities and shareholders' equity	$	10,089,215						$	8,660,067						$	7,814,564
Net interest earnings			$	325,090						$	283,857						$	260,824
Net interest spread						3.62	%						3.65	%						3.68	%
Net interest margin on interest-earning assets						3.69	%						3.71	%						3.73	%
Fully tax-equivalent adjustment			$	9,415						$	9,961						$	12,404

⁽¹⁾ Averages for investment securities are based on historical cost and the yields do not give effect to changes in fair value that is reflected as a component of noninterest-earning assets, shareholders’ equity and deferred taxes.

⁽²⁾ Includes nonaccrual loans.  The impact of interest and fees not recognized on nonaccrual loans was immaterial.

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As discussed above, the change in net interest income (fully tax-equivalent basis) may be analyzed by segregating the volume and rate components of the changes in interest income and interest expense for each underlying category.

Table 4: Rate/Volume

	2017 Compared to 2016									2016 Compared to 2015
	Increase (Decrease) Due to Change in (1)									Increase (Decrease) Due to Change in (1)
(000's omitted)	Volume			Rate			Net Change			Volume			Rate			Net Change
Interest earned on:
Cash equivalents	$	140		$	156		$	296		$	17		$	40		$	57
Taxable investment securities		6,530			(2,869	)		3,661			2,745			86			2,831
Nontaxable investment securities		(2,853	)		(572	)		(3,425	)		(1,746	)		(535	)		(2,281	)
Loans (net of unearned discount)		41,057			2,133			43,190			25,840			(3,325	)		22,515
Total interest-earning assets (2)		44,444			(722	)		43,722			25,782			(2,660	)		23,122
Interest paid on:
Interest checking, savings and money market deposits		477			256			733			577			(54	)		523
Time deposits		63			(90	)		(27	)		59			(228	)		(169	)
Repurchase agreements		739			0			739			0			0			0
FHLB borrowings		(609	)		698			89			(1,250	)		573			(677	)
Subordinated debt held by unconsolidated subsidiary trusts		405			550			955			1			411			412
Total interest-bearing liabilities (2)		1,341			1,148			2,489			874			(785	)		89
Net interest earnings (2)	$	42,642		$	(1,409	)	$	41,233		$	24,784		$	(1,751	)	$	23,033

⁽¹⁾ The change in interest due to both rate and volume has been allocated to volume and rate changes in proportion to the relationship of the absolute dollar amounts of such change in each component.

⁽²⁾ Changes due to volume and rate are computed from the respective changes in average balances and rates of the totals; they are not a summation of the changes of the components.

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Noninterest Revenues

The Company’s sources of noninterest revenues are of four primary types: 1) general banking services related to loans, deposits and other core customer activities typically provided through the branch network and electronic banking channels (performed by CBNA); 2) employee benefit services (performed by BPAS and its subsidiaries); 3) wealth management services, comprised of trust services (performed by the trust unit within CBNA), investment products and services (performed by CISI and The Carta Group) and asset management services (performed by Nottingham); and 4) insurance products and services (performed by OneGroup).  Additionally, the Company has periodic transactions, most often net gains or losses from the sale of investment securities.

Table 5: Noninterest Revenues

	Years Ended December 31,
(000's omitted except ratios)	2017			2016			2015
Employee benefit services	$	80,830		$	46,628		$	45,388
Deposit service charges and fees		33,729			29,061			28,087
Electronic banking		29,722			25,781			22,263
Insurance services		26,150			23,149			3,352
Wealth management services		22,079			19,776			16,856
Other banking revenues		8,018			9,140			5,656
Mortgage banking		1,893			2,090			1,701
Subtotal		202,421			155,625			123,303
Gain/(Loss) on sales of investment securities, net		2			0			(4	)
Total noninterest revenues	$	202,423		$	155,625		$	123,299
Noninterest revenues/operating revenues (FTE basis) (1)		38.8	%		35.5	%		32.3	%

⁽¹⁾ For purposes of this ratio noninterest revenues excludes gains (losses) on sales of investment securities and insurance-related recoveries. Operating revenues are defined as net interest income on a fully-tax equivalent basis, plus noninterest revenues, excluding gains (losses) on sales of investment securities, insurance-related recoveries and acquired non-impaired loan accretion.  See Table 20 for Reconciliation of GAAP to Non-GAAP measures.

As displayed in Table 5, total noninterest revenues, excluding gains on the sale of investment securities, increased by $46.8 million, or 30.1%, to $202.4 million in 2017 as compared to 2016.  The increase was comprised of growth in revenue from the Company’s employee benefit services businesses, primarily from the acquisition of NRS, increased debit card-related revenue, and increased deposit service fees associated with the Merchants acquisition, partially offset by lower mortgage banking revenue and a decrease in other banking revenues related to a nonrecurring insurance-related gain recognized in 2016.  Noninterest revenues, excluding losses on securities sales, increased by $32.3 million, or 26.2%, to $155.6 million in 2016 as compared to 2015.  The increase was comprised of growth in revenue from the Company’s financial services businesses, driven primarily by the acquisition of OneGroup and OWM, increased debit card-related revenue, increased employee benefit service fees, increased deposit service fees and $1.6 million in nonrecurring insurance-related gains, partially offset by lower fees from account overdraft protection programs continuing the trend of lower utilization of overdraft protection programs and a decline in certain other deposit-related services.

Noninterest revenues as a percent of operating revenues (FTE basis) were 38.8% in 2017, up 3.3% from the prior year.  The current year increase was due to the 30.1% increase in noninterest revenues mentioned above, while net interest income (FTE basis) increased at a slower pace of 14.5%.  The 3.2% increase in this ratio from 2015 to 2016 was driven by a 26.2% increase in noninterest revenues, primarily the result of growth in the financial services businesses driven by the acquisition of OneGroup and OWM, growth in debit card related income and employee benefit service fees, while net interest income increased at a rate of 8.8%.

A significant portion of the Company’s recurring noninterest revenue is comprised of the wide variety of fees earned from general banking services provided through the branch network and electronic banking channels, which totaled $71.5 million in 2017, an increase of $7.5 million, or 11.7%, from the prior year.  The increase was driven by the addition of new deposit relationships from both acquired growth related to the Merchants acquisition and organic sources, as well as increased debit card-related revenues and increased deposit service fees, partially offset by a decrease in other banking revenues related to a nonrecurring insurance-related gain recognized in 2016.  Fees from general banking services were $64.0 million in 2016, an increase of $8.0 million, or 14.2%, from 2015.  The increase was driven by the addition of new deposit relationships from both acquired growth related to the Oneida acquisition and organic sources, as well as increased debit card-related revenues and $1.6 million in nonrecurring insurance-related gains, partially offset by the continuing trend of lower utilization of overdraft protection programs and other deposit-related services.

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Mortgage banking revenue consists of realized gains or losses from the sale of residential mortgage loans and the origination of mortgage loan servicing rights, unrealized gains and losses on residential mortgage loans held for sale and related commitments, mortgage loan servicing fees, and other mortgage loan-related fee revenue earned on sold consumer mortgages.  In 2017, mortgage banking revenue totaled $1.9 million which decreased $0.2 million from the revenue generated in 2016, which increased $0.4 million from 2015.  Residential mortgage loans sold to investors, primarily Fannie Mae, totaled $32.9 million in 2017 as compared to $45.9 million and $35.5 million during 2016 and 2015, respectively.  Residential mortgage loans held for sale and recorded at fair value at December 31, 2017 and 2016 totaled $0.5 million and $2.4 million, respectively.  Realization of the unrealized gains or losses on consumer mortgage loans held for sale and the related commitments, as well as future revenue generation from mortgage banking activities, will be dependent on market conditions and long-term interest rate trends.

As disclosed in Table 5, noninterest revenue from financial services (revenues from employee benefit services, wealth management services and insurance services) increased $39.5 million, or 44.1%, in 2017 to $129.1 million.  In 2017, financial services revenue accounted for 64% of total noninterest revenues, as compared to 58% in 2016.  Employee benefit services generated revenue of $80.8 million in 2017 that reflected growth of $34.2 million, or 73.4%, driven primarily by the acquisition of NRS.  Employee benefit services revenue of $46.6 million in 2016 was $1.2 million higher than 2015’s results, driven by a combination of new client generation, activities acquired with the Oneida transaction and expanded service offerings.

Wealth management and insurance services revenues increased $5.3 million, or 12.4%, in 2017 primarily due to revenue growth from OneGroup, which represented $3.0 million of the increase, and an increase in personal trust revenue of $2.3 million from the prior year primarily due to the Merchants acquisition.  CISI revenue decreased $0.1 million and Nottingham revenue increased $0.1 million compared to 2016.  Wealth management and insurance services revenue increased $22.7 million, or 112%, in 2016 primarily from the acquisition of OneGroup and OWM, which was the main driver of the $19.8 million increase in insurance-related revenues.

Assets under administration increased $45.1 billion to $62.9 billion for the employee benefit services segment in 2017 as compared to 2016 due to acquired growth from the NRS acquisition and the addition of new client assets.  Assets under management increased $1.5 billion to $6.4 billion for the wealth management businesses at year end 2017 as compared to one year earlier due to the addition of new client assets. Assets under administration within the Company’s employee benefit services segment decreased $0.3 billion to $17.8 billion at the end of 2016 from $18.1 billion at year-end 2015 due to outflows in response to broad market shifts in the fourth quarter of 2016.  Assets under management with the Company’s wealth management services segment increased $0.2 billion to $4.9 billion at the end of 2016 from $4.7 billion at year-end 2015 due to the addition of new client assets.

Noninterest Expenses

As shown in Table 6, noninterest expenses of $347.1 million in 2017 were $80.3 million, or 30.1%, higher than 2016, primarily due to the expenses associated with operating an expanded branch network and other business activities acquired with the Merchants and NRS transactions, as well as increased acquisition expenses.  Noninterest expenses in 2016 increased $33.8 million, or 14.5%, from 2015 to $266.8 million, and included expenses associated with operating an expanded branch network and other business activities acquired with the Oneida transaction.

Operating expenses (excluding acquisition expenses and amortization of intangible assets) as a percent of average assets for 2017 was 3.02%, an increase of two basis points from 3.00% in 2016 and 17 basis points higher than 2.85% in 2015.  The increase in this ratio for 2017 was due to a 17.2% increase in operating expenses, primarily a result of expanded operations due to the Merchants and NRS acquisitions, while average assets grew by 16.5% due primarily to acquired net assets and intangibles from the Merchants and NRS transactions.  The increase in this ratio for 2016 was due to a 16.8% increase in operating expenses, primarily a result of a full year of expanded operations due to the Oneida acquisition, while average assets grew by 10.8% due to organic loan growth and the Oneida acquisition.  The increases in this ratio in both years reflected the impact of the acquired financial services businesses that carry a low level of average assets compared to banking operations.

The efficiency ratio, a performance measurement tool widely used by banks, is defined by the Company as operating expenses (excluding acquisition expenses and intangible amortization) divided by operating revenue (fully tax‑equivalent net interest income plus noninterest income, excluding acquired non-impaired loan accretion,  net securities gains and losses, and insurance-related recoveries).  Lower ratios are correlated to higher operating efficiency.  In 2017, the efficiency ratio was 1.30% lower than 2016 as the 19.7% increase in operating revenue, comprised of a 14.5% increase in adjusted net interest income and a 30.1% increase in noninterest income, as defined above, grew at a faster pace than the 17.2% increase in operating expenses.  The ratio for 2016 was 1.4% above 2015 as a 16.8% increase in operating expenses, was greater than the 14.1% increase in operating revenues.  See Table 20 for Reconciliation of GAAP to Non-GAAP Measures.

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Table 6: Noninterest Expenses

	Years Ended December 31,
(000's omitted)	2017			2016			2015
Salaries and employee benefits	$	179,993		$	151,647		$	126,356
Occupancy and equipment		35,561			30,078			27,593
Data processing and communications		37,579			34,501			30,430
Amortization of intangible assets		16,941			5,479			3,663
Legal and professional fees		11,576			8,455			6,813
Office supplies and postage		7,506			7,274			6,476
Business development and marketing		9,994			7,484			7,204
FDIC insurance premiums		3,473			3,671			3,962
Acquisition expenses		25,986			1,706			7,037
Other		18,540			16,553			13,521
Total noninterest expenses	$	347,149		$	266,848		$	233,055
Operating expenses(1)/average assets		3.02	%		3.00	%		2.85	%
Efficiency ratio(2)		58.3	%		59.6	%		58.2	%

⁽¹⁾Operating expenses are total noninterest expenses excluding acquisition expenses and amortization of intangible assets.  See Table 20 for Reconciliation of GAAP to Non-GAAP Measures.

⁽²⁾Efficiency ratio, a non-GAAP measure, is calculated as operating expenses as defined in footnote ⁽¹⁾ above divided by net interest income on a fully tax-equivalent basis excluding acquired non-impaired loan accretion plus noninterest revenues excluding gains and loss on investment sales and insurance related recoveries.  See Table 20 for Reconciliation of GAAP to Non-GAAP Measures.

Total salaries and employee benefits increased $28.3 million, or 18.7%, in 2017, due to the impact of annual merit increases, the addition of approximately 207 employees from the Merchants acquisition in May 2017, the addition of approximately 75 employees from the NRS acquisition in February 2017 and higher incentive compensation, partially offset by lower retirement plan costs.  Salaries and employee benefits increased $25.3 million, or 20.0%, in 2016, due to the impact of annual merit increases and higher pension costs, as well as the full year impact of the addition of approximately 275 employees from the Oneida acquisition in December 2015.  Total full-time equivalent staff at the end of 2017 was 2,617 compared to 2,262 at December 31, 2016 and 2,182 at the end of 2015.

Retirement plan expense in 2017 decreased $0.7 million due in part to the improved funded status of the defined benefit pension plan resulting from the May 2017 merger of the Merchants Bank Pension Plan into the Company’s plan.  Last year’s retirement plan expense increased $1.5 million from 2015’s level due to increased participation in the Company’s 401(k) and defined benefit pension plans primarily as a result of the Oneida acquisition.  The three assumptions that have the largest impact on the calculation of annual pension expense are the discount rate utilized, the rate applied to future compensation increases and the expected rate of return on plan assets.  See Note K to the financial statements for further information about the pension plan.

Total non-personnel, noninterest expenses, excluding one-time acquisition expenses, increased $27.7 million, or 24.4%, in 2017, mostly reflective of the additional costs associated with the acquired Merchants and NRS business activities.  Increases in occupancy and equipment, data processing and communications, amortization of intangible assets, legal and professional fees, office supplies and postage, business development and marketing and other expenses, all primarily a result of  the aforementioned additional costs associated with expanded business activities from the Merchants and NRS acquisitions, were only partially offset by a decrease in FDIC insurance premiums resulting from a change in the basis for the FDIC assessment calculation in the third quarter of 2016.  Total non-personnel noninterest expenses, excluding one-time acquisition expenses, increased $13.8 million, or 13.9%, in 2016, mostly reflective of the additional costs associated with the acquired Oneida business activities.  Increases in occupancy and equipment, data processing and communications, amortization of intangible assets, legal and professional fees, office supplies and postage, business development and marketing and other expenses, all primarily a result of  the aforementioned additional costs associated with acquired Oneida business activities, were only partially offset by a decrease in FDIC insurance premiums resulting from the previously mentioned change in the FDIC assessment rate schedule.

Acquisition expenses for 2017 totaled $26.0 million, including $24.6 million associated with the Merchants acquisition, $1.2 million associated with the NRS acquisition and $0.2 related to all other acquisitions.  Acquisition expenses for 2016 totaled $1.7 million, including $0.3 million associated with the Oneida acquisition, and $0.9 million and $0.5 million associated with the Merchants transaction and NRS acquisition, respectively.  Acquisition expenses totaled $7.0 million in 2015 and were associated with the Oneida transaction.

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Income Taxes

The Company estimates its income tax expense based on the amount it expects to owe the respective taxing authorities, plus the impact of deferred tax items.  Taxes are discussed in more detail in Note I of the Consolidated Financial Statements beginning on page 85.  Accrued taxes represent the net estimated amount due or to be received from taxing authorities.  In estimating accrued taxes, management assesses the relative merits and risks of the appropriate tax treatment of transactions, taking into account statutory, judicial and regulatory guidance in the context of the Company’s tax position.  If the final resolution of taxes payable differs from its estimates due to regulatory determination or legislative or judicial actions, adjustments to tax expense may be required.

On December 22, 2017, H.R.1, referred to as the “Tax Cuts and Jobs Act,” was signed into law.  Among other things, the Tax Cuts and Jobs Act permanently lowers the corporate tax rate to 21% from the existing maximum rate of 35%, effective for tax years including or commencing January 1, 2018.  ASC 740, Income Taxes, requires existing deferred tax assets and liabilities to be measured at the enacted tax rate expected to be applied when the temporary differences are to be realized or settled. Thus, as of the date of enactment, deferred taxes were re-measured based upon the new 21% tax rate.  Prior to the change in tax rate, the Company had recorded net deferred tax liabilities based on a marginal tax rate of 37.70%.  The change in tax rate resulted in a decrease in the marginal tax rate to 24.29% and a deferred tax benefit of $38.0 million from the write-down of the net deferred tax liabilities. The effect of this change in tax law was recorded as a component of the income tax provision including those deferred assets and liabilities that were established through a financial statement component other than continuing operations.

The effective tax rate for 2017 was 5.8%, reflective of a $38.0 million one-time gain from the revaluation of net deferred tax liabilities related to the recently enacted Tax Cuts and Jobs Act.  The adjusted effective tax rate for 2017, excluding the one-time gain from revaluation of net deferred tax liabilities, was 29.5% compared to 32.8% in 2016 and 31.0% in 2015.  The decline in the adjusted effective rate for 2017 is primarily attributable to new accounting guidance for share-based transactions that requires all excess tax benefits and deficiencies associated with share-based compensation to be recognized as income tax expense or benefit, partially offset by a higher proportion of income being generated from fully taxable sources.

Shareholders’ Equity

Shareholders’ equity ended 2017 at $1.64 billion, up $437.2 million, or 36.5%, from the end of 2016.  This increase reflects $262.3 million related to stock issued in connection with the Merchants acquisition, $78.5 million related to stock issued in connection with the NRS acquisition, $2.3 million related to stock issued in connection with the GBR acquisition, net income of $150.7 million, $4.6 million from the issuance of shares through the employee stock plan, $10.1 million for treasury stock issued to the Company’s 401(k) plan and $5.1 million from stock-based compensation.  These increases were partially offset by common stock dividends declared of $65.5 million and a $10.9 million decrease in accumulated other comprehensive income.  The change in accumulated other comprehensive income was comprised of an $11.1 million decrease due to changes in the unrealized gains and losses in the Company’s available-for-sale investment portfolio, partially offset by a positive $0.2 million adjustment to the funded status of the Company’s employee retirement plans.  Excluding accumulated other comprehensive income in both 2017 and 2016, shareholders’ equity rose by $448.8 million, or 37.7%.  Shares outstanding increased by 6.3 million during the year as 4.7 million shares were issued in connection with the Merchants acquisition, 1.3 million shares were issued in connection with the NRS acquisition, 0.04 million shares were issued in connection with the GBR acquisition and a net 0.3 million shares were issued under the employee stock plan, deferred compensation arrangements and to the Company’s 401(k) plan.

Shareholders’ equity ended 2016 at $1.20 billion, up $57.5 million, or 5.0%, from one year earlier.  This increase reflects net income of $103.8 million, $10.6 million from the issuance of shares through the employee stock plan, $8.9 million for treasury stock issued to the Company’s 401(k) plan and $4.8 million from stock-based compensation.  These increases were partially offset by common stock dividends declared of $55.7 million, an $11.4 million decrease in accumulated other comprehensive income, and treasury stock purchases of $3.5 million.  The change in accumulated other comprehensive income was comprised of a $14.7 million decrease due to changes in the unrealized gains and losses in the Company’s available-for-sale investment portfolio, due principally to the rise in long-term interest rates at the end of 2016, partially offset by a positive $3.3 million adjustment to the funded status of the Company’s employee retirement plans.  Excluding accumulated other comprehensive income in both 2016 and 2015, shareholders’ equity rose by $68.8 million, or 6.1%.  Shares outstanding increased by 0.7 million during the year due to share issuances under the employee stock plan and to the Company’s 401(k) plan.

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The Company’s ratio of ending Tier 1 capital to adjusted quarterly average assets (or Tier 1 leverage ratio), the primary measure for which regulators have established a 5% minimum for an institution to be considered “well-capitalized,” decreased 55 basis points from the prior year to end the year at 10.00%.  This was the result of a 22.4% increase in average adjusted net assets (excludes investment market value adjustment, and a portion of intangible assets net of related deferred tax liabilities)  from the prior year, while Tier 1 capital increased by 15.9%.  For additional financial information on the Company’s regulatory capital, refer to Note P – Regulatory Matters in the Notes to Consolidated Financial Statements.   The tangible equity-to-tangible assets ratio (a non-GAAP measure) was 8.61% at the end of 2017 versus 9.24% one year earlier (See Table 20 for Reconciliation of GAAP to Non-GAAP Measures).  The decrease was due to tangible assets increasing at a faster pace than tangible common shareholders’ equity, primarily as a result of acquired asset growth outpacing growth in tangible capital, due to the intangible assets created as part of the Merchants and NRS acquisitions.  The Company manages organic and acquired growth in a manner that enables it to continue to maintain and grow its capital base and maintain its ability to take advantage of future strategic growth opportunities.

Cash dividends declared on common stock in 2017 of $65.5 million represented an increase of 17.6% over the prior year.  This growth was a result of the increase in outstanding shares as noted above and a $0.06 increase in dividends per share for the year.  Dividends per share for 2017 of $1.32 represents a 4.8% increase from $1.26 in 2016, a result of quarterly dividends per share increasing from $0.31 to $0.32 (a 3.2% increase) during the third quarter of 2016 and from $0.32 to $0.34 (a 6.3% increase) in the third quarter of 2017.  The 2017 increase in quarterly dividends marked the 25^th consecutive year of dividend increases for the Company.  The dividend payout ratio for this year was 43.5% compared to 53.7% in 2016, and 55.5% in 2015.  The dividend payout ratio decreased during 2017 because net income increased 45.2% from 2016 while dividends declared increased 17.6%.  The payout ratio decreased during 2016 because net income increased 13.8% while dividends declared increased 10.0%.

Liquidity

Liquidity risk is a measure of the Company’s ability to raise cash when needed at a reasonable cost and minimize any loss.  The Bank maintains appropriate liquidity levels in both normal operating environments as well as stressed environments.  The Company must be capable of meeting all obligations to its customers at any time and, therefore, the active management of its liquidity position remains an important management objective.  The Bank has appointed the Asset Liability Committee (“ALCO”) to manage liquidity risk using policy guidelines and limits on indicators of potential liquidity risk.  The indicators are monitored using a scorecard with three risk level limits.  These risk indicators measure core liquidity and funding needs, capital at risk and change in available funding sources.  The risk indicators are monitored using such statistics as the core basic surplus ratio, unencumbered securities to average assets, free loan collateral to average assets, loans to deposits, deposits to total funding and borrowings to total funding ratios.

Given the uncertain nature of our customers' demands as well as the Company's desire to take advantage of earnings enhancement opportunities, the Company must have adequate sources of on- and off-balance sheet funds available that can be utilized in time of need.  Accordingly, in addition to the liquidity provided by balance sheet cash flows, liquidity must be supplemented with additional sources such as credit lines from correspondent banks and borrowings from the FHLB and the Federal Reserve Bank of New York (“Federal Reserve”).  Other funding alternatives may also be appropriate from time to time, including wholesale and retail repurchase agreements, large certificates of deposit and the brokered CD market.  The primary source of non-deposit funds is FHLB overnight advances, of which $24.0 million was outstanding at December 31, 2017.

The Bank’s primary sources of liquidity are its liquid assets, as well as unencumbered securities that can be used to collateralize additional funding.  At December 31, 2017, the Bank had $221.0 million of cash and cash equivalents of which $19.7 million are interest-earning deposits held at the Federal Reserve, FHLB and other correspondent banks.  The Bank also had $1.7 billion in unused FHLB borrowing capacity based on the Company’s quarter-end collateral levels.  Additionally, the Company has $1.6 billion of unencumbered securities that could be pledged at the FHLB or Federal Reserve to obtain additional funding.  There is $25.0 million available in unsecured lines of credit with other correspondent banks at year end.

The Company’s primary approach to measuring short-term liquidity is known as the Basic Surplus/Deficit model.  It is used to calculate liquidity over two time periods: first, the amount of cash that could be made available within 30 days (calculated as liquid assets less short-term liabilities as a percentage of average assets); and second, a projection of subsequent cash availability over an additional 60 days.  As of December 31, 2017, this ratio was 13.8% for 30-days and 13.7% for 90-days, excluding the Company's capacity to borrow additional funds from the FHLB and other sources.  There is a sufficient amount of liquidity given the Company’s internal policy requirement of 7.5%.

A sources and uses statement is used by the Company to measure intermediate liquidity risk over the next twelve months.  As of December 31, 2017, there is more than enough liquidity available during the next year to cover projected cash outflows.  In addition, stress tests on the cash flows are performed in various scenarios ranging from high probability events with a low impact on the liquidity position to low probability events with a high impact on the liquidity position.  The results of the stress tests as of December 31, 2017 indicate the Bank has sufficient sources of funds for the next year in all simulated stressed scenarios.

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To measure longer-term liquidity, a baseline projection of loan and deposit growth for five years is made to reflect how liquidity levels could change over time.  This five-year measure reflects ample liquidity for loan and other asset growth over the next five years.

Though remote, the possibility of a funding crisis exists at all financial institutions.  Accordingly, management has addressed this issue by formulating a Liquidity Contingency Plan, which has been reviewed and approved by both the Company’s Board of Directors and the Company’s ALCO.  The plan addresses the actions that the Company would take in response to both a short-term and long-term funding crisis.

A short-term funding crisis would most likely result from a shock to the financial system, either internal or external, which disrupts orderly short-term funding operations.  Such a crisis would likely be temporary in nature and would not involve a change in credit ratings.  A long-term funding crisis would most likely be the result of drastic credit deterioration at the Company.  Management believes that both potential circumstances have been fully addressed through detailed action plans and the establishment of trigger points for monitoring such events.

Intangible Assets

The changes in intangible assets by reporting segment for the year ended December 31, 2017 are summarized as follows:

Table 7: Intangible Assets

(000’s omitted)	Balance at December 31, 2016		Additions		Amortization		Impairment		Balance at December 31, 2017
Banking Segment
Goodwill	$	440,870	$	189,046	$	0	$	0	$	629,916
Core deposit intangibles		7,107		23,214		5,296		0		25,025
Total Banking Segment		447,977		212,260		5,296		0		654,941
Employee Benefit Services Segment
Goodwill		8,019		76,430		0		0		84,449
Other intangibles		666		60,200		8,578		0		52,288
Total Employee Benefit Services Segment		8,685		136,630		8,578		0		136,737
All Other Segment
Goodwill		16,253		3,812		0		0		20,065
Other intangibles		7,929		8,483		3,067		0		13,345
Total All Other Segment		24,182		12,295		3,067		0		33,410
Total	$	480,844	$	361,185	$	16,941	$	0	$	825,088

Intangible assets at the end of 2017 totaled $825.1 million, an increase of $344.2 million from the prior year due to the addition of $269.2 million of goodwill, $23.2 million of core deposit intangibles and $68.7 million of other intangibles arising from acquisition activity, partially offset by $16.9 million of amortization during the year.  The NRS acquisition resulted in the addition of $76.4 million of goodwill and $60.2 million of other intangibles.  The acquisition of Merchants resulted in the addition of $189.0 million of goodwill, $23.2 million of core deposit intangibles and $2.9 million of other intangibles.  The BAS, Dryfoos, GBR and NECM acquisitions added a combined $3.8 million of goodwill and $5.6 million of other intangibles.  Goodwill represents the excess cost of an acquisition over the fair value of the net assets acquired.  Goodwill at December 31, 2017 totaled $734.4 million, comprised of $629.9 million related to banking acquisitions and $104.5 million arising from the acquisition of financial services businesses.  Goodwill is subject to periodic impairment analysis to determine whether the carrying value of the identified businesses exceeds their fair value, which would necessitate a write-down of goodwill.  The Company completed its goodwill impairment analyses during the first quarters of 2017 and 2016 and no adjustments were necessary for the banking or financial services businesses.  The impairment analyses were based upon discounted cash flow modeling techniques that require management to make estimates regarding the amount and timing of expected future cash flows.  It also requires the selection of discount rates that reflect the current return characteristics of the market in relation to present risk-free interest rates, estimated equity market premiums and company-specific performance and risk indicators.  Management believes that there is a low probability of future impairment with regard to the goodwill associated with its whole-bank, branch and financial services business acquisitions.

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Core deposit intangibles represent the value of acquired non-time deposits in excess of funding that could have been obtained in the capital markets.  Core deposit intangibles are amortized on either an accelerated or straight-line basis over periods ranging from eight to twenty years.  The recognition of customer relationship intangibles was determined based on a methodology that calculates the present value of the projected future net income derived from the acquired customer base.  These customer relationship intangibles are being amortized on an accelerated basis over periods ranging from seven to twelve years.

Loans

The Company’s loans outstanding, by type, as of December 31 are as follows:

Table 8: Loans Outstanding

(000's omitted)	2017			2016			2015			2014			2013
Consumer mortgage	$	2,220,298		$	1,819,701		$	1,769,754		$	1,613,384		$	1,582,058
Business lending		2,424,223			1,490,076			1,497,271			1,262,484			1,260,364
Consumer indirect		1,011,978			1,044,972			935,760			833,968			740,002
Consumer direct		179,929			191,815			195,076			184,028			180,139
Home equity		420,329			401,998			403,514			342,342			346,520
Gross loans		6,256,757			4,948,562			4,801,375			4,236,206			4,109,083
Allowance for loan losses		(47,583	)		(47,233	)		(45,401	)		(45,341	)		(44,319	)
Loans, net of allowance for loan losses	$	6,209,174		$	4,901,329		$	4,755,974		$	4,190,865		$	4,064,764
Daily average of total gross loans	$	5,818,367		$	4,881,905		$	4,288,091		$	4,156,840		$	3,954,515

As disclosed in Table 8 above, gross loans outstanding of $6.26 billion as of December 31, 2017 increased $1.31 billion, or 26.4%, compared to December 31, 2016, primarily reflecting growth in the consumer mortgage, business lending, and home equity portfolios attributable to the Merchants acquisition, partially offset by decreases in the consumer indirect and consumer direct portfolios.  Excluding loans acquired from Merchants, loans decreased $53.1 million, or 1.1%, reflective of muted demand in consumer and business markets, as well as continuation of above average levels of early pay-offs.  Gross loans outstanding of $4.9 billion as of December 31, 2016 increased $147.2 million, or 3.1%, compared to December 31, 2015 as a result of organic growth in the consumer mortgage and consumer indirect portfolios attributable to the low interest rate environment and continued business development efforts, partially offset by decreases in the business lending, the consumer direct and home equity portfolios.

The compounded annual growth rate (“CAGR”) for the Company’s total loan portfolio between 2012 and 2017 was 10.1%, with approximately 14% of the total growth for the period attributable to organic growth and 86% attributable to acquired balances.  The greatest overall expansion occurred in business loans, which grew at a 14.5% CAGR driven in most part by acquisitions during the five year period.  The consumer mortgage portfolio grew at a compounded annual growth rate of 8.9% from 2012 to 2017.  The consumer installment segment grew at a CAGR of 7.8%.  The home equity lending segment grew at a compounded annual growth rate of 2.9% from 2012 to 2017, including the impact from acquisitions.

The weighting of the components of the Company’s loan portfolio enables it to be highly diversified.  Approximately 61% of loans outstanding at the end of 2017 were made to consumers borrowing on an installment, line of credit or residential mortgage loan basis.  The business lending portfolio is also broadly diversified by industry type as demonstrated by the following distributions at year-end 2017: commercial real estate (33%), restaurant & lodging (9%), healthcare (8%), general services (9%), retail trade (7%), agriculture (4%), manufacturing (8%), construction (5%), wholesale trade (4%) and motor vehicle and parts dealers (4%).  A variety of other industries with less than a 3% share of the total portfolio comprise the remaining 9%.

The consumer mortgage loans include no exposure to Alt-A or other higher-risk mortgage products and are comprised of fixed (97%) and adjustable rate (3%) residential lending.  Volume in this portion of the Company’s loan portfolio has been strong over the last few years due to low long-term interest rates and comparatively stable real estate valuations in the Company’s primary markets.  Consumer mortgages increased $400.6 million, or 22.0%, in 2017 and does not include $32.9 million of longer-term, fixed-rate residential mortgages that the Company originated and sold, principally to Fannie Mae.  Excluding loans acquired in the Merchants transaction, the consumer mortgage portfolio grew $59.4 million, or 3.3% in 2017.  Consumer mortgages increased $49.9 million, or 2.8%, in 2016 and does not include $45.9 million of longer-term, fixed-rate residential mortgages that the Company originated and sold, principally to Fannie Mae.  The Company’s solid performance is a reflection of the attractiveness of its product offerings and its ability to successfully meet customer needs.  Market interest rates, expected duration, and the Company’s overall interest rate sensitivity profile continue to be the most significant factors in determining whether the Company chooses to retain versus sell and service portions of its new consumer mortgage generation.

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The combined total of general-purpose business lending to commercial, industrial, non-profit and municipal customers, mortgages on commercial property and dealer floor plan financing is characterized as the Company’s business lending activity.  The business lending portfolio increased $934.1 million, or 62.7%, in 2017 due to loans acquired in the Merchants transaction, partially offset by contractual and unscheduled principal reductions.  Excluding loans from the Merchants acquisition, the portfolio decreased $42.8 million, or 2.9% in 2017 reflective of contractual and unscheduled principal reductions outpacing organic loan originations.  The portfolio decreased $7.2 million, or 0.5%, in 2016 as principal reductions outpaced new loan volume.  Highly competitive conditions continue to prevail in the small and middle market commercial segments in which the Company primarily operates.  The Company maintains its commitment to generating growth in its business portfolio in a manner that adheres to its twin goals of maintaining strong asset quality and producing profitable margins.  The Company continues to invest in additional personnel, technology, and business development resources to further strengthen its capabilities in this important product category.

The following table shows the maturities and type of interest rates for business and construction loans as of December 31, 2017:

Table 9:  Maturity Distribution of Business and Construction Loans ⁽¹⁾

(000's omitted)	Maturing in One Year or Less		Maturing After One but Within Five Years		Maturing After Five Years		Total
Commercial, financial and agricultural	$	338,045	$	680,752	$	1,348,345	$	2,367,142
Real estate – construction		71,984		0		0		71,984
Total	$	410,029	$	680,752	$	1,348,345	$	2,439,126
Fixed interest rates	$	194,405	$	390,053	$	589,824	$	1,174,282
Floating or adjustable interest rates		215,624		290,699		758,521		1,264,844
Total	$	410,029	$	680,752	$	1,348,345	$	2,439,126
(1) Scheduled repayments are reported in the maturity category in which the payment is due.

Consumer installment loans, both those originated directly in the branches (referred to as “consumer direct”) and indirectly in automobile, marine, and recreational vehicle dealerships (referred to as “consumer indirect”), decreased $44.9 million, or 3.6%, from one year ago.  Excluding loans from the Merchants acquisition, the portfolio decreased $48.6 million, or 3.9% in 2017.  In 2016 the portfolio increased $106.0 million, or 9.4%, from the year earlier period.  The Company is focused on maintaining the solid profitability produced by its in-market and contiguous market indirect portfolio, while continuing to pursue its disciplined, long-term approach to expanding its dealer network.  However, the increasingly competitive nature of this market has resulted in aggressive pricing and incentives that have caused some compression of indirect loan spreads and prompted the Company to reduce new indirect loan volume, particularly in the automobile segment.

Home equity loans increased $18.3 million, or 4.6%, from the end of 2016, including $39.5 million of loans acquired in the Merchants acquisition, partially offset by home equity loans being paid off or down as part of the heightened level of consumer mortgage refinancing that in some cases are used to pay down or pay off home equity balances in the continued low rate environment.  Excluding the loans from the Merchants transaction, the portfolio decreased $21.2 million, or 5.3%.  Home equity loans decreased $1.5 million, or 0.4%, from the end of 2015.

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Asset Quality

The following table presents information regarding nonperforming assets as of December 31:

Table 10: Nonperforming Assets

(000's omitted)	2017			2016			2015			2014			2013
Nonaccrual loans
Consumer mortgage	$	13,788		$	13,684		$	12,790		$	15,323		$	12,560
Business lending		8,272			5,063			6,567			2,780			4,555
Consumer indirect		0			0			0			10			14
Consumer direct		0			0			15			20			4
Home equity		2,680			1,872			2,356			2,598			2,340
Total nonaccrual loans		24,740			20,619			21,728			20,731			19,473
Accruing loans 90+ days delinquent
Consumer mortgage		1,526			1,385			1,805			2,397			1,338
Business lending		571			145			126			350			164
Consumer indirect		303			169			102			82			755
Consumer direct		48			58			51			36			117
Home equity		264			1,319			111			241			181
Total accruing loans 90+ days delinquent		2,712			3,076			2,195			3,106			2,555
Nonperforming loans
Consumer mortgage		15,314			15,069			14,595			17,720			13,898
Business lending		8,843			5,208			6,693			3,130			4,719
Consumer indirect		303			169			102			92			769
Consumer direct		48			58			66			56			121
Home equity		2,944			3,191			2,467			2,839			2,521
Total nonperforming loans		27,452			23,695			23,923			23,837			22,028
Other real estate (OREO)		1,915			1,966			2,088			1,855			5,060
Total nonperforming assets	$	29,367		$	25,661		$	26,011		$	25,692		$	27,088
Nonperforming loans / total loans		0.44	%		0.48	%		0.50	%		0.56	%		0.54	%
Legacy nonperforming loans / legacy total loans (1)		0.40	%		0.42	%		0.49	%		0.52	%		0.49	%
Nonperforming assets / total loans and other real estate		0.47	%		0.52	%		0.54	%		0.61	%		0.66	%
Delinquent loans (30 days old to nonaccruing) to total loans		1.10	%		1.19	%		1.16	%		1.46	%		1.49	%
Loan loss provision to net charge-offs		103	%		129	%		101	%		117	%		122	%
Legacy loan loss provision to net charge-offs (1)		96	%		130	%		86	%		125	%		134	%

⁽¹⁾Legacy loans exclude loans acquired after January 1, 2009.

The Company places a loan on nonaccrual status when the loan becomes 90 days past due, or sooner if management concludes collection of interest is doubtful, except when, in the opinion of management, it is well-collateralized and in the process of collection.  As shown in Table 10 above, nonperforming loans, defined as nonaccruing loans and accruing loans 90 days or more past due, ended 2017 at $27.5 million, an increase of $3.8 million from one year earlier.  The ratio of nonperforming loans to total loans at December 31, 2017 decreased four basis points from the prior year to 0.44%.  Excluding acquired loans, the ratio of nonperforming loans to total loans at the end of 2017 was down two basis points from the prior year at 0.40%.  The ratio of nonperforming assets (which includes other real estate owned, or “OREO”, in addition to nonperforming loans) to total loans plus OREO decreased to 0.47% at year-end 2017, down five basis points from one year earlier.  The Company’s success at keeping these ratios at favorable levels throughout varying economic conditions was the result of continued focus on maintaining strict underwriting standards, early problem recognition, and effective collection and recovery efforts.  At December 31, 2017, OREO was comprised of three commercial real estate properties with a total value of $0.6 million and 27 residential properties with a total value of $1.3 million. This compares to five commercial real estate properties with a total value of $0.8 million and 24 residential properties with a total value of $1.2 million at December 31, 2016.

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Approximately 56% of nonperforming loans at December 31, 2017 are related to the consumer mortgage portfolio.  Collateral values of residential properties within the Company’s market area have remained relatively stable over the past several years.  Additionally, improved process efficiency and economic conditions, including lower unemployment levels, have positively impacted consumers and have resulted in more favorable nonperforming mortgage ratios in 2016 and 2017.  Approximately 32% of the nonperforming loans at December 31, 2017 are related to the business lending portfolio, which is comprised of business loans broadly diversified by industry type.  The level of nonperforming business loans has increased from the prior year primarily due to the impact of a single commercial relationship that added $5.2 million to nonperforming loans at the end of 2017.  The remaining 12% percent of nonperforming loans relate to consumer installment and home equity loans.  The allowance for loan losses to nonperforming loans ratio, a general measure of coverage adequacy, was 173% at the end of 2017 compared to 199% at year-end 2016 and 190% at December 31, 2015.  Excluding acquired loans, the ratio of allowance for legacy loans to nonperforming legacy loans was 244% at the end of 2017, compared to 245% at year-end 2015 and 212% at December 31, 2015.

Members of the Company’s senior management, special asset officers and lenders review all delinquent and nonaccrual loans and OREO regularly in order to identify deteriorating situations, monitor known problem credits and discuss any needed changes to collection efforts, if warranted.  Based on the group’s consensus, a relationship may be assigned a special assets officer or other senior lending officer to review the loan, meet with the borrowers, assess the collateral and recommend an action plan.  This plan could include foreclosure, restructuring loans, issuing demand letters or other actions.  The Company’s larger criticized credits are also reviewed on a quarterly basis by senior credit administration management, as well as special assets officers and commercial lending management to monitor their status and discuss relationship management plans.  Commercial lending management reviews the entire criticized business loan portfolio on a monthly basis.

Total delinquencies, defined as loans 30 days or more past due or in nonaccrual status, finished the current year at 1.10% of total loans outstanding, compared to 1.19% at the end of 2016.  As of year-end 2017, delinquency ratios for business lending, consumer installment loans, consumer mortgages and home equity loans were 0.65%, 1.41%, 1.42%, and 1.12%, respectively.  These ratios reflected a consistent level of business loan delinquencies compared to prior year levels, and an improvement in consumer mortgage and home equity delinquencies, while year-end delinquency rates in the consumer installment categories increased from ratios of 0.65%, 1.30%, 1.54%, and 1.30%, respectively, as of December 31, 2016.  Delinquency levels, particularly in the 30 to 89 days category, tend to be somewhat volatile due to their measurement at a point in time, and therefore management believes that it is useful to evaluate this ratio over a longer time period.  The average quarter-end delinquency ratio for total loans in 2017 was 1.02%, as compared to an average of 1.09% in 2016, and 1.16% in 2015, reflective of management’s continued focus on maintaining strict underwriting standards, as well as the effective utilization of its collection capabilities.

Loans are considered modified in a troubled debt restructuring (“TDR”) when, due to a borrower’s financial difficulties, the Company makes one or more concessions to the borrower that it would not otherwise consider.  These modifications primarily include, among others, an extension of the term of the loan or granting a period with reduced or no principal and/or interest payments, which can be recaptured through payments made over the remaining term of the loan or at maturity.  Historically, the Company has created very few TDRs.   Regulatory guidance by the OCC requires certain loans that have been discharged in Chapter 7 bankruptcy to be reported as TDRs.  In accordance with this guidance, loans that have been discharged in Chapter 7 bankruptcy but not reaffirmed by the borrower are classified as TDRs, irrespective of payment history or delinquency status, even if the repayment terms for the loan have not been otherwise modified and the Company’s lien position against the underlying collateral remains unchanged.  Pursuant to that guidance, the Company records a charge-off equal to any portion of the carrying value that exceeds the net realizable value of the collateral.  As of December 31, 2017, the Company had 72 loans totaling $2.7 million considered to be nonaccruing TDRs and 154 loans totaling $3.4 million considered to be accruing TDRs.  This compares to 56 loans totaling $1.8 million considered to be nonaccruing TDRs and 158 loans totaling $3.7 million considered to be accruing TDRs at December 31, 2016.

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The changes in the allowance for loan losses for the last five years are as follows:

Table 11: Allowance for Loan Losses Activity

	Years Ended December 31,
(000's omitted except for ratios)	2017			2016			2015			2014			2013
Allowance for loan losses at beginning of period	$	47,233		$	45,401		$	45,341		$	44,319		$	42,888
Charge-offs:
Consumer mortgage		707			647			1,374			1,075			1,012
Business lending		5,229			1,969			2,249			1,596			3,671
Consumer indirect		8,456			7,643			6,714			6,784			4,544
Consumer direct		2,081			1,706			1,490			1,595			1,954
Home equity		284			218			244			765			650
Total charge-offs		16,757			12,183			12,071			11,815			11,831
Recoveries:
Consumer mortgage		50			115			80			205			36
Business lending		656			616			877			750			692
Consumer indirect		4,516			4,168			3,943			3,773			3,488
Consumer direct		849			901			722			846			1,034
Home equity		52			139			62			85			20
Total recoveries		6,123			5,939			5,684			5,659			5,270
Net charge-offs		10,634			6,244			6,387			6,156			6,561
Provision for loan losses		10,675			8,039			6,349			7,497			7,358
Provision for acquired impaired loans		309			37			98			(319	)		634
Allowance for loan losses at end of period	$	47,583		$	47,233		$	45,401		$	45,341		$	44,319
Allowance for loan losses / total loans		0.76	%		0.95	%		0.95	%		1.07	%		1.08	%
Allowance for legacy loan losses / total legacy loans (1)		0.98	%		1.02	%		1.05	%		1.14	%		1.15	%
Allowance for loan losses / nonperforming loans		173	%		199	%		190	%		190	%		201	%
Allowance for legacy loans  / nonperforming legacy loans (1)		244	%		245	%		212	%		221	%		234	%
Net charge-offs to average loans outstanding:
Consumer mortgage		0.03	%		0.03	%		0.08	%		0.05	%		0.06	%
Business lending		0.22	%		0.09	%		0.11	%		0.07	%		0.24	%
Consumer indirect		0.38	%		0.35	%		0.33	%		0.38	%		0.16	%
Consumer direct		0.65	%		0.40	%		0.41	%		0.40	%		0.52	%
Home equity		0.06	%		0.02	%		0.05	%		0.20	%		0.18	%
Total loans		0.18	%		0.13	%		0.15	%		0.15	%		0.17	%

⁽¹⁾Legacy loans exclude loans acquired after January 1, 2009.

As displayed in Table 11 above, total net charge-offs in 2017 were $10.6 million, $4.4 million more than the prior year due to a higher level of net charge-offs in the business lending portfolio, primarily related to a $3.1 million partial charge-off of a single relationship in the fourth quarter, and modestly higher net charge-offs in consumer mortgage, home equity, consumer indirect and consumer direct portfolios.  Net charge-offs in 2016 were $0.1 million less than 2015 due to lower levels of net charge-offs in the business lending, consumer mortgage and home equity portfolios, partially offset by higher net charge-offs in the consumer indirect and consumer direct portfolios.

Due to the significant increases in average loan balances over time as a result of acquisitions and organic growth, management believes that net charge-offs as a percent of average loans (“net charge-off ratio”) offers the most meaningful representation of charge-off trends.  The total net charge-off ratio of 0.18% for 2017 was five basis points higher than the 0.13% ratio from 2016, and three basis points higher than the 0.15% ratio from 2015.  Gross charge-offs as a percentage of average loans was 0.29% in 2017, as compared to 0.25% in 2016, and 0.28% in 2015, evidence of management’s continued focus on maintaining strict underwriting standards.  Continued strong recovery efforts were evidenced by recoveries of $6.1 million in 2017, representing 42% of average gross charge-offs for the latest two years, compared to 49% in 2016 and 48% in 2015.

45

Business loan net charge-offs increased in 2017, totaling $4.6 million, or 0.22% of average business loans outstanding versus $1.4 million, or 0.09% of the average outstanding balance in 2016, primarily due to a $3.1 million partial charge-off of a single relationship in 2017.  Consumer installment loan net charge-offs increased to $5.2 million this year from $4.3 million in 2016, with a net charge-off ratio of 0.42% in 2017 and 0.36% in 2016.  The dollar amount of consumer mortgage net charge-offs increased $0.1 million in 2017, with the net charge-off ratio remaining consistent with 2016 at 0.03%.  Home equity net charge-offs increased $0.2 million in 2016 while the net charge-off ratio increased four basis points to 0.06%.

Management continually evaluates the credit quality of the Company’s loan portfolio and conducts a formal review of the adequacy of the allowance for loan losses on a quarterly basis.  The two primary components of the loan review process that are used to determine proper allowance levels are specific and general loan loss allocations.  Measurement of specific loan loss allocations is typically based on expected future cash flows, collateral values and other factors that may impact the borrower’s ability to repay.  Impaired loans with outstanding balances that are greater than $0.5 million are evaluated for specific loan loss allocations.  Consumer mortgages, consumer installment and home equity loans are considered smaller balance homogeneous loans and are evaluated collectively.  The Company considers a loan to be impaired when, based on current information and events, it is probable that the Company will be unable to collect all principal and interest according to the contractual terms of the loan agreement or the loan is delinquent 90 days or more.

The second component of the allowance establishment process, general loan loss allocations, is composed of two calculations that are computed on the five main loan segments: consumer mortgage, business lending, consumer indirect, consumer direct, and home equity.  The first calculation determines an allowance level based on the latest 36 months of historical net charge-off data for each loan category (business loans exclude balances with specific loan loss allocations).  The second calculation is qualitative and takes into consideration eight qualitative environmental factors: levels and trends in delinquencies and impaired loans; levels of and trends in charge-offs and recoveries; trends in volume and terms of loans; effects of any changes in risk selection and underwriting standards, and other changes in lending policies, procedure, and practices; experience, ability, and depth of lending management and other relevant staff; national and local economic trends and conditions; industry conditions; and effects of changes in credit concentrations.  The allowance levels computed from the specific and general loan loss allocation methods are combined with unallocated allowances, if any, to derive the required allowance for loan losses to be reflected on the Consolidated Statement of Condition.  As it has in prior periods, the Company strives to continually refine and enhance its loss evaluation and estimation processes.

The loan loss provision is calculated by subtracting the previous period allowance for loan losses, net of the interim period net charge-offs, from the current required allowance level.  This provision is then recorded in the income statement for that period. Members of senior management and the Audit and Compliance Committee of the Board of Directors (“Audit Committee”) review the adequacy of the allowance for loan losses quarterly.  Management is committed to continually improving the credit assessment and risk management capabilities of the Company and has dedicated the resources necessary to ensure advancement in this critical area of operations.

Acquired loans are recorded at their acquisition date fair values and, therefore, are excluded from the calculation of loan loss reserves as of the acquisition date.  To the extent there is a decrease in the present value of cash flows from the acquired impaired loans after the date of acquisition, the Company records a provision for potential losses. During the year ended December 31, 2017, an additional $0.3 million of provision for loan losses related to acquired impaired loans was recorded.  During the years ended December 31, 2016 and 2015, an additional provision for loan loss related to acquired impaired loans of $0.03 million and $0.1 million, respectively, was recorded.

For acquired loans that are not deemed impaired at acquisition, a fair value adjustment is recorded that includes both credit and interest rate considerations.  Subsequent to the purchase date, the methods utilized to estimate the required allowance for loan losses for these loans is similar to originated loans, however, the Company records a provision for loan losses only when the required allowance exceeds any remaining purchased discounts.  During 2017, the Company recorded a provision for loan losses on acquired non-impaired loans of $4.5 million, with approximately $3.1 million related to the partial charge-off of a single commercial relationship in the fourth quarter.  For full year 2016, the Company recorded a provision for loan losses on acquired non-impaired loans of $0.8 million.  During 2015, the Company recorded a provision for loan losses on acquired non-impaired loans of $1.0 million, primarily for the Oneida commercial portfolio where the net fair value of the pool was deemed greater than its par value at acquisition.

46

The allowance for loan losses increased to $47.6 million at the end 2017 from $47.2 million as of year-end 2016.  The $0.4 million increase was primarily due to changes in asset quality metrics.  The allowance for legacy loan losses decreased $0.3 million primarily due to changes in the composition of the loan portfolio associated with unscheduled principal reductions in the business lending portfolio.  The ratio of the allowance for loan losses to total loans of 0.76% for year-end 2017 was down 19 basis points from the 0.95% ratio for 2016 and 2015, primarily due to acquired growth in the loan portfolio.  The ratio of allowance for legacy loan losses to total legacy loans decreased four basis points to 0.98% for 2017 as compared 2016.  Management believes the year-end 2017 allowance for loan losses to be adequate in light of the probable losses inherent in the Company’s loan portfolio.

The loan loss provision for legacy loans of $6.2 million in 2017, was $1.0 million less than the prior year, and reflects management’s assessment of the probable losses in the loan portfolio, as discussed above.  The loan loss provision as a percentage of average loans was 0.19% in 2017 as compared to 0.17% in 2016 and 0.15% in 2015.  The loan loss provision was 103% of net charge-offs this year versus 129% in 2016 and 101% in 2015, reflective of the assessed risk in the overall portfolio.

The following table sets forth the allocation of the allowance for loan losses by loan category as of the end of the years indicated, as well as the proportional share each category is to total loans.  This allocation is based on management’s assessment, as of a given point in time, of the risk characteristics of each of the component parts of the total loan portfolio and is subject to changes when the risk factors of each component part change.  The allocation is not indicative of either the specific amounts of the loan categories in which future charge-offs may be taken, nor should it be taken as an indicator of future loss trends.  The allocation of the allowance to each category does not restrict the use of the allowance to absorb losses in any category.

Table 12: Allowance for Loan Losses by Loan Type

	2017					2016					2015					2014					2013
(000's omitted except for ratios)	Allowance		Loan Mix			Allowance		Loan Mix			Allowance		Loan Mix			Allowance		Loan Mix			Allowance		Loan Mix
Consumer mortgage	$	10,465		35.5	%	$	10,094		36.8	%	$	10,198		36.8	%	$	10,286		38.1	%	$	8,994		38.5	%
Business lending		17,257		38.5	%		17,220		30.0	%		15,749		31.0	%		15,787		29.7	%		17,507		30.5	%
Consumer indirect		13,468		16.2	%		13,782		21.1	%		12,422		19.5	%		11,544		19.7	%		10,248		18.0	%
Consumer direct		3,039		2.9	%		2,979		3.9	%		2,997		4.1	%		3,083		4.3	%		3,181		4.4	%
Home equity		2,107		6.7	%		2,399		8.1	%		2,666		8.4	%		2,701		8.1	%		1,830		8.4	%
Acquired impaired loans		147		0.2	%		108		0.1	%		168		0.2	%		173		0.1	%		530		0.2	%
Unallocated		1,100					651					1,201					1,767					2,029
Total	$	47,583		100.0	%	$	47,233		100.0	%	$	45,401		100.0	%	$	45,341		100.0	%	$	44,319		100.0	%

As demonstrated in Table 12 above and discussed previously, business lending and consumer installment by their nature carries higher credit risk than residential real estate, and as a result these loans carry allowance for loan losses that cover a higher percentage of their total portfolio balances.  The unallocated allowance is maintained for inherent losses in the portfolio that are not reflected in the historical loss ratios, model imprecision, and for acquired loan portfolios in the process of being fully integrated at year-end.  The unallocated allowance increased from $0.7 million at year-end 2016 to $1.1 million at December 31, 2017.  The changes in year-over-year allowance allocations reflect management’s continued refinement of its loss estimation techniques.  However, given the inherent imprecision in the many estimates used in the determination of the allocated portion of the allowance, management deliberately remained cautious and conservative in establishing the overall allowance for loan losses.  Management considers the allocated and unallocated portions of the allowance for loan losses to be prudent and reasonable.  Furthermore, the Company’s allowance for loan losses is general in nature and is available to absorb losses from any loan category.

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Funding Sources

The Company utilizes a variety of funding sources to support the earning-asset base as well as to achieve targeted growth objectives.  Overall funding is comprised of three primary sources that possess a variety of maturity, stability, and price characteristics; deposits of individuals, partnerships and corporations (nonpublic deposits), municipal deposits that are collateralized for amounts not covered by FDIC insurance (public funds), and external borrowings.  The average daily amount of deposits and the average rate paid on each of the following deposit categories are summarized below for the years indicated:

Table 13: Average Deposits

	2017					2016					2015
(000's omitted, except rates)	Average Balance		Average Rate Paid			Average Balance		Average Rate Paid			Average Balance		Average Rate Paid
Noninterest checking deposits	$	2,048,414		0.00	%	$	1,558,548		0.00	%	$	1,352,683		0.00	%
Interest checking deposits		1,782,668		0.06	%		1,631,560		0.03	%		1,429,450		0.03	%
Regular savings deposits		1,385,386		0.06	%		1,303,814		0.07	%		1,106,127		0.08	%
Money market deposits		2,069,228		0.14	%		1,776,838		0.16	%		1,518,184		0.15	%
Time deposits		765,666		0.41	%		750,944		0.43	%		737,734		0.46	%
Total deposits	$	8,051,362		0.10	%	$	7,021,704		0.10	%	$	6,144,178		0.11	%

As displayed in Table 13, average total deposits in 2017 increased $1.03 billion, or 14.7%, from the prior year comprised of a $1.01 billion, or 16.2%, increase in non-time (“core”) deposits, and a $14.7 million, or 2.0%, increase in time deposits.  Excluding the impact of the Merchants acquisition, average deposits increased $166.8 million, or 2.4%, as compared to 2016.  Consistent with the Company’s focus on expanding core account relationships and reduced customer demand for time deposits, average core deposit balances, excluding deposits acquired in the Merchants acquisition, grew $260.2 million, or 4.1%, as compared to 2016, while time deposits, excluding the impact of Merchants acquired balances, declined $93.4 million, or 12.4%.  This shift in mix also reflects the diminished rate differential between core and time deposits in the low interest rate environment and contributed to the cost of deposits, including the impact of non-interest checking deposits, that was consistent with 2016 at 0.10%.

Total average deposits for 2016 equaled $7.02 billion, up $877.5 million, or 14.3%, from 2015 comprised of a $864.3 million, or 16.0%, increase in core deposits, and a $13.2 million, or 1.8%, increase in time deposits.  Excluding the impact of the Oneida acquisition, average deposits increased $223.5 million, or 3.7%, as compared to 2015.  Average non-acquired, non-time (“core”) deposit balances grew $316.1 million, or 5.9%, as compared to 2015 while non-acquired time deposit balances declined $92.6 million, or 12.7%.  The cost of deposits, including the impact of non-interest checking deposits, decreased to 0.10% in 2016 as compared to 0.11% for 2015.

Nonpublic, core deposits are frequently considered to be a bank’s most attractive source of funding because they are generally stable, do not need to be collateralized, carry a relatively low rate, generate solid fee income, and provide a strong customer base for which a variety of loan, deposit and other financial service-related products can be cross-sold.  The Company’s funding composition continues to benefit from a high level of nonpublic deposits, which reached an all-time high in 2017 with an average balance of $6.99 billion, an increase of $946.0 million, or 15.6%, over the comparable 2016 period.  Excluding the impact of the Merchants acquisition, average nonpublic deposits increased $127.7 million during 2017.

Full-year average public fund deposits increased $83.7 million, or 8.6%, during 2017 to $1.06 billion.  Excluding the impact of the Merchants acquisition, average public fund deposits increased $39.1 million, or 4.0%, during 2017.  Public fund deposit balances tend to be more volatile than nonpublic deposits because they are heavily impacted by the seasonality of tax collection and fiscal spending patterns, as well as the longer-term financial position of the local government entities, which can change from year to year.  However, the Company has many strong, long-standing relationships with municipal entities throughout its markets and the diversified core deposits held by these customers have provided an attractive and comparatively stable funding source over an extended time period.  The Company is required to collateralize all local government deposits in excess of FDIC coverage with marketable securities from its investment portfolio.  Because of this stipulation, as well as the competitive bidding nature of municipal time deposits, management considers this funding source to share some of the attributes of external borrowings.

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The mix of average deposits has been changing throughout the last several years.  The weighting of core (noninterest checking, interest checking, savings, and money market accounts) has increased, while time deposits’ weighting has decreased.  This change in deposit mix reflects the Company’s focus on expanding core account relationships and customers’ preference for unrestricted accounts in the low interest rate environment.  The average balance for time deposit accounts decreased from 10.7% of total average deposits in 2016 to 9.5% of total average deposits for 2017.  Correspondingly, average core deposit balances have increased from 89.3% in 2016 to 90.5% in 2017.  This shift in mix contributed to a cost of interest-bearing deposits of 0.13% in 2017 that was consistent with the prior year and lower than the 0.15% in 2015.  The total cost of deposit funding, which includes noninterest-bearing deposits, was 0.10% in 2017 and unchanged from 2016, benefiting from the 31.4% increase in average non-interest bearing checking balances.

The remaining maturities of time deposits in amounts of $250,000 or more outstanding as of December 31 are as follows:

Table 14: Maturity of Time Deposits $250,000 or More

(000's omitted)	2017		2016
Less than three months	$	14,429	$	14,221
Three months to six months		16,111		10,832
Six months to one year		21,335		17,089
Over one year		15,811		9,082
Total	$	67,686	$	51,224

Borrowing sources for the Company include the FHLB, Federal Reserve, and other correspondent banks, as well as access to the brokered CD and repurchase markets through established relationships with primary market security dealers.  The Company also had $122.8 million in floating-rate subordinated debt outstanding at the end of 2017 that is held by unconsolidated subsidiary trusts.

As shown in Table 15, year-end 2017 external borrowings totaled $485.9 million, an increase of $237.5 million from the $248.4 million outstanding at the end of 2016 primarily due to securities sold under an agreement to repurchase, subordinated debt held by unconsolidated subsidiary trusts and long-term debt assumed as part of the Merchants transaction, partially offset by a decrease in overnight FHLB borrowings.  External borrowings averaged $379.9 million, or 4.5% of total funding sources for 2017, as compared to $271.9 million, or 3.7% of total funding sources for 2016.  This ratio increased due to the aforementioned external borrowings assumed as part of the Merchants transaction.  As shown in Table 16, at the end of 2017 the Company had $361.0 million, or 74% of external borrowings, that had remaining terms of one year or less as compared to 59% of external borrowings maturing within one year at December 31, 2016.

As displayed in Table 3 on page 33, after an increase in the percentage of funding from deposits in 2016 due to the pay down of borrowings after the Oneida acquisition was completed, the percentage of funding from deposits decreased slightly in 2017 due to the external borrowings assumed as part of the Merchants transaction having a larger impact on this ratio than the acquired deposits.  The percentage of average funding derived from deposits was 95.5% in 2017 as compared to 96.3% in 2016 and 92.3% in 2015.  During 2017, average borrowings increased 39.7% while average deposits increased 14.7%.

The following table summarizes the outstanding balance of borrowings of the Company as of December 31:

Table 15: Borrowings

(000's omitted, except rates)	2017			2016			2015
FHLB overnight advance	$	24,000		$	146,200		$	301,300
Subordinated debt held by unconsolidated subsidiary trusts		122,814			102,170			102,146
Securities sold under agreement to repurchase, short term		337,011			0			0
FHLB long term advances		2,071			0			0
Balance at end of period	$	485,896		$	248,370		$	403,446
Daily average during the year	$	379,933		$	271,927		$	513,827
Maximum month-end balance	$	576,791		$	414,648		$	701,338
Weighted-average rate during the year		1.51	%		1.46	%		0.82	%
Weighted-average year-end rate		1.34	%		1.70	%		1.05	%

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The following table shows the contractual maturities of various obligations as of December 31, 2017:

Table 16: Maturities of Contractual Obligations

(000's omitted)	Maturing Within One Year or Less		Maturing After One Year but Within Three Years		Maturing After Three Years but Within Five Years		Maturing After Five Years		Total
FHLB overnight advance	$	24,000	$	0	$	0	$	0	$	24,000
Subordinated debt held by unconsolidated subsidiary trusts		0		0		0		123,146		123,146
Securities sold under agreement to repurchase, short term		337,011		0		0		0		337,011
Other long-term debt		0		0		0		2,071		2,071
Interest on borrowings		4,548		9,052		9,052		54,522		77,174
Operating leases		9,189		14,797		9,265		8,623		41,874
Total	$	374,748	$	23,849	$	18,317	$	188,362	$	605,276

Financial Instruments with Off-Balance Sheet Risk

The Company is a party to financial instruments with off-balance-sheet risk in the normal course of business to meet the financing needs of its customers.  These financial instruments consist primarily of commitments to extend credit and standby letters of credit.  Commitments to extend credit are agreements to lend to customers, generally having fixed expiration dates or other termination clauses that may require payment of a fee.  These commitments consist principally of unused commercial and consumer credit lines.  Standby letters of credit generally are contingent upon the failure of the customer to perform according to the terms of an underlying contract with a third party.  The credit risks associated with commitments to extend credit and standby letters of credit are essentially the same as that involved with extending loans to customers and are subject to normal credit policies.  Collateral may be required based on management’s assessment of the customer’s creditworthiness.  The fair value of these commitments is considered immaterial for disclosure purposes.

The contractual amounts of these off-balance sheet financial instruments as of December 31 were as follows:

Table 17: Off-Balance Sheet Financial Instruments

(000's omitted)	2017		2016
Commitments to extend credit	$	1,080,004	$	773,442
Standby letters of credit		23,782		22,656
Total	$	1,103,786	$	796,098

Investments

The objective of the Company’s investment portfolio is to hold low-risk, high-quality earning assets that provide favorable returns and provide another effective tool to actively manage its earning asset/funding liability position in order to maximize future net interest income opportunities.  This must be accomplished within the following constraints: (a) implementing certain interest rate risk management strategies which achieve a relatively stable level of net interest income; (b) providing both the regulatory and operational liquidity necessary to conduct day-to-day business activities; (c) considering investment risk-weights as determined by the regulatory risk-based capital guidelines; and (d) generating a favorable return without undue compromise of the other requirements.

The carrying value of the Company’s investment portfolio ended 2017 at $3.08 billion, an increase of $297.0 million, or 10.7%, from the end of 2016.  The book value (excluding unrealized gains and losses) of the portfolio increased $314.8 million from December 31, 2016, and the unrealized gain on the available-for-sale securities decreased $17.9 million.  During 2017, the Company purchased $4.8 million of obligations of state and political subdivisions at an average yield of 4.23% and $82.5 million of government agency mortgage-backed securities at an average yield of 2.57%.  Offsetting these purchases were $157.3 million of maturities, calls and collections.  Additionally, $390.9 million of investment securities were acquired as part of the Merchants transaction and $20.3 million of certificates of deposit were acquired as part of the NRS acquisition, of which $19.1 million were subsequently redeemed.

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The carrying value of the Company’s investment portfolio decreased $63.5 million during 2016 to end the year at $2.78 billion.  The book value of available-for-sale investments decreased $39.5 million from December 31, 2015, and the unrealized gain on the available-for-sale securities decreased $24.0 million.  During 2016, the Company purchased $8.6 million of obligations of state and political subdivisions at an average yield of 4.24% and $57.4 million of government agency mortgage-backed securities at an average yield of 2.20%.  Offsetting these purchases were $109.6 million of maturities, calls and collections.

The investment portfolio has limited credit risk due to the composition continuing to heavily favor U.S. Treasury debentures, U.S. Agency mortgage-backed pass-throughs, U.S. Agency CMOs and municipal bonds.  The U.S. Treasury debentures, U.S. Agency mortgage-backed pass-throughs and U.S. Agency CMOs are all rated AAA (highest possible rating) by Moody’s and AA+ by Standard and Poor’s.  The majority of the municipal bonds are rated A or higher.  The portfolio does not include any private label mortgage-backed securities (MBS) or private label collateralized mortgage obligations.  The overall mix of securities within the portfolio over the last year has changed, with an increase in the proportion of U.S. Treasury and agency securities, government agency mortgage-backed securities and collateralized mortgage obligations, while the proportion of obligations of state and political subdivisions decreased.

The net pre-tax unrealized market value gain on the available-for-sale investment portfolio as of December 31, 2017 was $23.9 million, as compared to $41.8 million one year earlier.  This decrease is indicative of the interest rate movements during the respective time periods and the changes in the size and composition of the portfolio.

The following table sets forth the amortized cost and market value for the Company's investment securities portfolio:

Table 18: Investment Securities

	2017				2016				2015
(000's omitted)	Amortized Cost/Book Value		Fair Value		Amortized Cost/Book Value		Fair Value		Amortized Cost/Book Value		Fair Value
Available-for-Sale Portfolio:
U.S. Treasury and agency securities	$	2,043,023	$	2,054,071	$	1,876,358	$	1,902,762	$	1,866,819	$	1,899,978
Obligations of state and political subdivisions		514,949		528,956		582,655		594,990		640,455		666,883
Government agency mortgage-backed securities		358,180		357,538		232,657		235,230		205,220		210,865
Corporate debt securities		2,648		2,623		5,716		5,687		16,672		16,680
Government agency collateralized mortgage obligations		88,097		87,374		9,225		9,535		12,862		13,308
Marketable equity securities		251		526		252		452		250		399
Total available-for-sale portfolio		3,007,148		3,031,088		2,706,863		2,748,656		2,742,278		2,808,113
Other Securities:
FHLB common stock		9,896		9,896		12,191		12,191		19,317		19,317
Federal Reserve Bank common stock		30,690		30,690		19,781		19,781		16,050		16,050
Certificates of deposit		3,865		3,865		0		0		0		0
Other equity securities		5,840		5,840		3,764		3,764		4,460		4,460
Total other securities		50,291		50,291		35,736		35,736		39,827		39,827
Total	$	3,057,439	$	3,081,379	$	2,742,599	$	2,784,392	$	2,782,105	$	2,847,940

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The following table sets forth as of December 31, 2017, the maturities of investment debt securities and the weighted-average yields of such securities, which have been calculated on the cost basis, weighted for scheduled maturity of each security:

Table 19: Maturities of Investment Debt Securities

(000's omitted, except rates)	Maturing Within One Year or Less			Maturing After One Year But Within Five Years			Maturing After Five Years But Within Ten Years			Maturing After Ten Years			Total Amortized Cost/Book Value
Available-for-Sale Portfolio:
U.S. Treasury and agency securities	$	15,042		$	1,426,691		$	586,083		$	15,207		$	2,043,023
Obligations of state and political subdivisions		30,924			136,084			172,659			175,282			514,949
Government agency mortgage-backed securities (2)		77			23,137			52,651			282,315			358,180
Corporate debt securities		0			2,648			0			0			2,648
Government agency collateralized mortgage obligations (2)		0			670			5,178			82,249			88,097
Available-for-sale portfolio	$	46,043		$	1,589,230		$	816,571		$	555,053		$	3,006,897
Weighted-average yield (1)		2.11	%		2.20	%		2.59	%		3.05	%		2.46	%

⁽¹⁾ Weighted-average yields are an arithmetic computation of income (not fully tax-equivalent adjusted) divided by book balance; they may differ from the yield to maturity, which considers the time value of money.

⁽²⁾ Mortgage-backed securities and collateralized mortgage obligations are listed based on the contractual maturity.  Actual maturities will differ from contractual maturities because borrowers may have the right to call or prepay certain obligations with or without penalties.

Impact of Inflation and Changing Prices

The Company’s financial statements have been prepared in terms of historical dollars, without considering changes in the relative purchasing power of money over time due to inflation.  Unlike most industrial companies, virtually all of the assets and liabilities of a financial institution are monetary in nature.  As a result, interest rates have a more significant impact on a financial institution's performance than the effect of general levels of inflation.  Interest rates do not necessarily move in the same direction or in the same magnitude as the prices of goods and services.  Notwithstanding this, inflation can directly affect the value of loan collateral, real estate in particular.

New Accounting Pronouncements

See “New Accounting Pronouncements” Section of Note A of the notes to the consolidated financial statements on page 70 for recently issued accounting pronouncements applicable to the Company that have not yet been adopted.

Forward-Looking Statements

This document contains comments or information that constitute forward-looking statements (within the meaning of the Private Securities Litigation Reform Act of 1995), which involve significant risks and uncertainties.  Forward-looking statements often use words such as “anticipate,” “target,” “expect,” “estimate,” “intend,” “plan,” “goal,” “forecast, ” “believe,” or other words of similar meaning.  Actual results may differ materially from the results discussed in the forward-looking statements.  Moreover, the Company’s plans, objectives and intentions are subject to change based on various factors (some of which are beyond the Company’s control).  Factors that could cause actual results to differ from those discussed in the forward-looking statements include:  (1) risks related to credit quality, interest rate sensitivity and liquidity;  (2) the strength of the U.S. economy in general and the strength of the local economies where the Company conducts its business;  (3) the effect of, and changes in, monetary and fiscal policies and laws, including interest rate policies of the Board of Governors of the Federal Reserve System;  (4) inflation, interest rate, market and monetary fluctuations;  (5) the timely development of new products and services and customer perception of the overall value thereof (including features, pricing and quality) compared to competing products and services;  (6) changes in consumer spending, borrowing and savings habits;  (7) technological changes and implementation and financial risks associated with transitioning to new technology-based systems involving large multi-year contracts; (8)the ability of the Company to maintain the security of its financial, accounting, technology, data processing and other operating systems and facilities;  (9) any acquisitions or mergers that might be considered or consummated by the Company and the costs and factors associated therewith, including differences in the actual financial results of the acquisition or merger compared to expectations and the realization of anticipated cost savings and revenue enhancements;  (10) the ability to maintain and increase market share and control expenses;  (11) the nature, timing and effect of changes in banking regulations or other regulatory or legislative requirements affecting the respective businesses of the Company and its subsidiaries, including changes in laws and regulations concerning taxes, accounting, banking, risk management, securities and other aspects of the financial services industry, specifically the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010;  (12) changes in the Company’s organization, compensation and benefit plans and in the availability of, and compensation levels for, employees in its geographic markets;  (13) the outcome of pending or future litigation and government proceedings; (14) other risk factors outlined in the Company’s filings with the SEC from time to time; and (15) the success of the Company at managing the risks of the foregoing.

52

The foregoing list of important factors is not all-inclusive.  Such forward-looking statements speak only as of the date on which they are made and the Company does not undertake any obligation to update any forward-looking statement, whether written or oral, to reflect events or circumstances after the date on which such statement is made.  If the Company does update or correct one or more forward-looking statements, investors and others should not conclude that the Company will make additional updates or corrections with respect thereto or with respect to other forward-looking statements.

Reconciliation of GAAP to Non-GAAP Measures

Table 20: GAAP to Non-GAAP Reconciliations

(000's omitted)	2017			2016			2015			2014			2013
Income statement data
Net income
Net income (GAAP)	$	150,717		$	103,812		$	91,230		$	91,353		$	78,829
Acquisition expenses		25,986			1,706			7,037			123			2,181
Tax effect of acquisition expenses		(7,677	)		(560	)		(2,182	)		(36	)		(633	)
Subtotal (non-GAAP)		169,026			104,958			96,085			91,440			80,377
Amortization of intangibles		16,941			5,479			3,663			4,287			4,469
Tax effect of amortization of intangibles		(5,005	)		(1,800	)		(1,135	)		(1,267	)		(1,296	)
Subtotal (non-GAAP)		180,962			108,637			98,613			94,460			83,550
Acquired non-impaired loan accretion		(5,888	)		(2,868	)		(2,256	)		(3,338	)		(3,720	)
Tax effect of acquired non-impaired loan accretion		1,739			942			700			987			1,079
Subtotal (non-GAAP)		176,813			106,711			97,057			92,109			80,909
Litigation settlement		0			0			0			2,800			0
Tax effect of litigation settlement		0			0			0			(828	)		0
Subtotal (non-GAAP)		176,813			106,711			97,057			94,081			80,909
Tax Cuts and Jobs Act deferred impact		(38,010	)		0			0			0			0
Adjusted net income (non-GAAP)	$	138,803		$	106,711		$	97,057		$	94,081		$	80,909
Return on average assets
Adjusted net income (non-GAAP)	$	138,803		$	106,711		$	97,057		$	94,081		$	80,909
Average total assets		10,089,215			8,660,067			7,814,564			7,423,903			7,201,047
Adjusted return on average assets (non-GAAP)		1.38	%		1.23	%		1.24	%		1.27	%		1.12	%
Return on average equity
Adjusted net income (non-GAAP)	$	138,803		$	106,711		$	97,057		$	94,081		$	80,909
Average total equity		1,475,761			1,211,520			1,028,038			946,626			872,296
Adjusted return on average equity (non-GAAP)		9.41	%		8.81	%		9.44	%		9.94	%		9.28	%

53

(000's omitted)	2017			2016			2015			2014			2013
Income statement data (continued)
Earnings per common share
Diluted earnings per share (GAAP)	$	3.03		$	2.32		$	2.19		$	2.22		$	1.94
Acquisition expenses		0.52			0.04			0.17			0.00			0.05
Tax effect of acquisition expenses		(0.15	)		(0.01	)		(0.05	)		(0.00	)		(0.01	)
Subtotal (non-GAAP)		3.40			2.35			2.31			2.22			1.98
Amortization of intangibles		0.34			0.12			0.09			0.10			0.11
Tax effect of amortization of intangibles		(0.10	)		(0.04	)		(0.03	)		(0.03	)		(0.03	)
Subtotal (non-GAAP)		3.64			2.43			2.37			2.29			2.06
Acquired non-impaired loan accretion		(0.12	)		(0.06	)		(0.05	)		(0.08	)		(0.09	)
Tax effect of acquired non-impaired loan accretion		0.04			0.02			0.01			0.02			0.03
Subtotal (non-GAAP)		3.56			2.39			2.33			2.23			2.00
Litigation settlement		0.00			0.00			0.00			0.07			0.00
Tax effect of litigation settlement		0.00			0.00			0.00			(0.02	)		0.00
Subtotal (non-GAAP)		3.56			2.39			2.33			2.28			2.00
Tax Cuts and Jobs Act deferred impact		(0.76	)		0.00			0.00			0.00			0.00
Adjusted net income (non-GAAP)	$	2.80		$	2.39		$	2.33		$	2.28		$	2.00
Noninterest operating expenses
Noninterest expenses (GAAP)	$	347,149		$	266,848		$	233,055		$	226,580		$	221,255
Amortization of intangibles		(16,941	)		(5,479	)		(3,663	)		(4,287	)		(4,469	)
Acquisition expenses		(25,986	)		(1,706	)		(7,037	)		(123	)		(2,181	)
Litigation settlement		(0	)		(0	)		(0	)		(2,800	)		(0	)
Total adjusted noninterest expenses (non-GAAP)	$	304,222		$	259,663		$	222,355		$	219,370		$	214,605
Efficiency ratio
Adjusted noninterest expenses (non-GAAP) - numerator	$	304,222		$	259,663		$	222,355		$	219,370		$	214,605
Fully tax-equivalent net interest income		325,090			283,857			260,824			259,961			253,154
Noninterest revenues		202,423			155,625			123,299			119,020			102,180
Acquired non-impaired loan accretion		(5,888	)		(2,868	)		(2,256	)		(3,338	)		(3,720	)
Insurance-related recovery		0			(950	)		0			0			0
(Gain)/Loss  on sale of investments and early retirement of long-term borrowings, net		(2	)		0			4			0			6,568
Operating revenues (non-GAAP) - denominator		521,623			435,664			381,871			375,643			358,182
Efficiency ratio (non-GAAP)		58.3	%		59.6	%		58.2	%		58.4	%		59.9	%

54

(000's omitted)	2017			2016			2015			2014			2013
Balance sheet data
Total assets
Total assets (GAAP)	$	10,746,198		$	8,666,437		$	8,552,669		$	7,489,440		$	7,095,864
Intangible assets		(825,088	)		(480,844	)		(484,146	)		(386,973	)		(390,499	)
Deferred taxes on intangible assets		48,419			43,504			39,724			35,842			32,339
Total tangible assets (non-GAAP)	$	9,969,529		$	8,229,097		$	8,108,247		$	7,138,309		$	6,737,704
Total common equity
Shareholders' Equity (GAAP)	$	1,635,315		$	1,198,100		$	1,140,647		$	987,904		$	875,812
Intangible assets		(825,088	)		(480,844	)		(484,146	)		(386,973	)		(390,499	)
Deferred taxes on intangible assets		48,419			43,504			39,724			35,842			32,339
Total tangible common equity (non-GAAP)	$	858,646		$	760,760		$	696,225		$	636,773		$	517,652
Net tangible equity-to-assets ratio
Total tangible common equity (non-GAAP) - numerator	$	858,646		$	760,760		$	696,225		$	636,773		$	517,652
Total tangible assets (non-GAAP) - denominator	$	9,969,529		$	8,229,097		$	8,108,247		$	7,138,309		$	6,737,704
Net tangible equity-to-assets ratio (non-GAAP)		8.61	%		9.24	%		8.59	%		8.92	%		7.68	%

Item 7A. Quantitative and Qualitative Disclosures about Market Risk

Market risk is the risk of loss in a financial instrument arising from adverse changes in market rates, prices or credit risk.  Credit risk associated with the Company’s loan portfolio has been previously discussed in the asset quality section of the MD&A.  Management believes that the tax risk of the Company’s municipal investments associated with potential future changes in statutory, judicial and regulatory actions is minimal.  Treasury, agency, mortgage-backed and CMO securities issued by government agencies comprise 83% of the total portfolio and are currently rated AAA by Moody’s Investor Services and AA+ by Standard & Poor’s.  Municipal and corporate bonds account for 17% of the total portfolio, of which, 98% carry a minimum rating of A-.  The remaining 2% of the portfolio is comprised of other investment grade securities.  The Company does not have material foreign currency exchange rate risk exposure.  Therefore, almost all the market risk in the investment portfolio is related to interest rates.

The ongoing monitoring and management of both interest rate risk and liquidity, in the short and long term time horizons is an important component of the Company's asset/liability management process, which is governed by limits established in the policies reviewed and approved annually by the Company’s Board of Directors.  The Board of Directors delegates responsibility for carrying out the policies to the ALCO, which meets each month.  The committee is made up of the Company's senior management as well as regional and line-of-business managers who oversee specific earning asset classes and various funding sources.  As the Company does not believe it is possible to reliably predict future interest rate movements, it has maintained an appropriate process and set of measurement tools, which enables it to identify and quantify sources of interest rate risk in varying rate environments.  The primary tool used by the Company in managing interest rate risk is income simulation.

55

While a wide variety of strategic balance sheet and treasury yield curve scenarios are tested on an ongoing basis, the following reflects the Company's projected net interest income sensitivity over the subsequent twelve months based on:

· Asset and liability levels using December 31, 2017 as a starting point.

· There are assumed to be conservative levels of balance sheet growth, low-to-mid single digit growth in loans and deposits, while using the cash flows from investment contractual maturities and prepayments to repay short-term capital market borrowings or reinvest into securities or cash equivalents.

· The prime rate and federal funds rates are assumed to move over a 12-month period while moving the long end of the treasury curve to spreads over the three month treasury that are more consistent with historical norms (normalized yield curve).  Deposit rates are assumed to move in a manner that reflects the historical relationship between deposit rate movement and changes in the federal funds rate.

· Cash flows are based on contractual maturity, optionality, and amortization schedules along with applicable prepayments derived from internal historical data and external sources.

Net Interest Income Sensitivity Model

Change in interest rates	Calculated annualized increase (decrease) in projected net interest income at December 31, 2017
+200 basis points	($3,734,000)
+100 basis points	($1,477,000)
-100 basis points	($6,931,000)

The modeled net interest income (NII) decreases in rising rate environments from the flat rate scenario.  The decrease is largely a result of assumed deposit and funding costs increasing faster than the repricing of corresponding assets.  In the short term (year one) the assumed increase of deposit rates in the rising rate environment temporarily outweighs the benefit of earning asset yields increasing to higher levels.  However, over a longer time period (years two and beyond), the growth in NII improves in the rising rate environments as lower yielding assets mature and are replaced at higher rates.

In the falling rate environment scenario, the Company shows interest rate risk exposure to lower short term rates.  Net interest income declines during the first twelve months largely due to lower assumed rates on new loans, including adjustable and variable rate assets.  Corresponding deposit rates are assumed to remain constant.

The analysis does not represent a Company forecast and should not be relied upon as being indicative of expected operating results.  These hypothetical estimates are based upon numerous assumptions: the nature and timing of interest rate levels (including yield curve shape), prepayments on loans and securities, deposit decay rates, pricing decisions on loans and deposits, reinvestment/replacement of asset and liability cash flows, and other factors.  While the assumptions are developed based upon reasonable economic and local market conditions, the Company cannot make any assurances as to the predictive nature of these assumptions, including how customer preferences or competitor influences might change.  Furthermore, the sensitivity analysis does not reflect actions that the ALCO might take in responding to or anticipating changes in interest rates.

56

Item 8.  Financial Statements and Supplementary Data

The following consolidated financial statements and independent registered public accounting firm’s report of Community Bank System, Inc. are contained on pages 58 through 104 of this item.

· Consolidated Statements of Condition,

December 31, 2017 and 2016

· Consolidated Statements of Income,

Years ended December 31, 2017, 2016, and 2015

· Consolidated Statements of Comprehensive Income,

Years ended December 31, 2017, 2016, and 2015

· Consolidated Statements of Changes in Shareholders' Equity,

Years ended December 31, 2017, 2016, and 2015

· Consolidated Statements of Cash Flows,

Years ended December 31, 2017, 2016, and 2015

· Notes to Consolidated Financial Statements,

December 31, 2017

· Management’s Report on Internal Control Over Financial Reporting

· Report of Independent Registered Public Accounting Firm

Quarterly Selected Data (Unaudited) for 2017 and 2016 are contained on page 108.

57

COMMUNITY BANK SYSTEM, INC.

CONSOLIDATED STATEMENTS OF CONDITION

(In Thousands, Except Share Data)

	December 31,
	2017			2016
Assets:
Cash and cash equivalents	$	221,038		$	173,857
Available-for-sale investment securities (cost of $3,007,148 and $2,706,863, respectively)		3,031,088			2,748,656
Other securities, at cost		50,291			35,736
Loans held for sale, at fair value		461			2,416
Loans		6,256,757			4,948,562
Allowance for loan losses		(47,583	)		(47,233	)
Net loans		6,209,174			4,901,329
Goodwill		734,430			465,142
Core deposit intangibles, net		25,025			7,107
Other intangibles, net		65,633			8,595
Intangible assets, net		825,088			480,844
Premises and equipment, net		123,393			112,318
Accrued interest and fees receivable		36,177			31,093
Other assets		249,488			180,188
Total assets	$	10,746,198		$	8,666,437
Liabilities:
Noninterest-bearing deposits	$	2,293,057		$	1,646,039
Interest-bearing deposits		6,151,363			5,429,915
Total deposits		8,444,420			7,075,954
Short-term borrowings		24,000			146,200
Securities sold under agreement to repurchase, short-term		337,011			0
Other long-term debt		2,071			0
Subordinated debt held by unconsolidated subsidiary trusts		122,814			102,170
Accrued interest and other liabilities		180,567			144,013
Total liabilities		9,110,883			7,468,337
Commitments and contingencies (See Note N)
Shareholders' equity:
Preferred stock, $1.00 par value, 500,000 shares authorized, 0 shares issued		0			0
Common stock, $1.00 par value, 75,000,000 shares authorized; 51,263,841 and 44,950,352 shares issued, respectively		51,264			44,950
Additional paid-in capital		894,879			545,775
Retained earnings		700,557			614,692
Accumulated other comprehensive (loss)/income		(3,699	)		7,843
Treasury stock, at cost (567,764 shares including 237,494 shares held by deferred compensation arrangements at December 31, 2017, and 512,937 shares at December 31, 2016)		(21,014	)		(15,160	)
Deferred compensation arrangements (237,494 shares at December 31, 2017)		13,328			0
Total shareholders' equity		1,635,315			1,198,100
Total liabilities and shareholders' equity	$	10,746,198		$	8,666,437

The accompanying notes are an integral part of the consolidated financial statements.

58

COMMUNITY BANK SYSTEM, INC.

CONSOLIDATED STATEMENTS OF INCOME

(In Thousands, Except Per-Share Data)

	Years Ended December 31,
	2017		2016		2015
Interest income:
Interest and fees on loans	$	253,949	$	211,467	$	187,743
Interest and dividends on taxable investments		60,159		56,201		52,871
Interest and dividends on nontaxable investments		15,347		17,519		19,008
Total interest income		329,455		285,187		259,622
Interest expense:
Interest on deposits		8,031		7,325		6,971
Interest on borrowings		1,845		1,017		1,694
Interest on subordinated debt held by unconsolidated subsidiary trusts		3,904		2,949		2,537
Total interest expense		13,780		11,291		11,202
Net interest income		315,675		273,896		248,420
Provision for loan losses		10,984		8,076		6,447
Net interest income after provision for loan losses		304,691		265,820		241,973
Noninterest revenues:
Deposit service fees		67,896		58,595		52,747
Other banking revenues		5,466		7,477		4,960
Employee benefit services		80,830		46,628		45,388
Insurance services		26,150		23,149		3,352
Wealth management services		22,079		19,776		16,856
Gain/(loss) on sales of investment securities, net		2		0		(4	)
Total noninterest revenues		202,423		155,625		123,299
Noninterest expenses:
Salaries and employee benefits		179,993		151,647		126,356
Occupancy and equipment		35,561		30,078		27,593
Data processing and communications		37,579		34,501		30,430
Amortization of intangible assets		16,941		5,479		3,663
Legal and professional fees		11,576		8,455		6,813
Office supplies and postage		7,506		7,274		6,476
Business development and marketing		9,994		7,484		7,204
FDIC insurance premiums		3,473		3,671		3,962
Acquisition expenses		25,986		1,706		7,037
Other expenses		18,540		16,553		13,521
Total noninterest expenses		347,149		266,848		233,055
Income before income taxes		159,965		154,597		132,217
Income taxes		9,248		50,785		40,987
Net income	$	150,717	$	103,812	$	91,230
Basic earnings per share	$	3.07	$	2.34	$	2.21
Diluted earnings per share	$	3.03	$	2.32	$	2.19
Cash dividends declared per share	$	1.32	$	1.26	$	1.22

The accompanying notes are an integral part of the consolidated financial statements.

59

COMMUNITY BANK SYSTEM, INC.

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(In Thousands)

	Years Ended December 31,
	2017			2016			2015
Pension and other post retirement obligations:
Amortization of actuarial (gains)/losses included in net periodic pension cost, gross	$	(707	)	$	5,514		$	(7,236	)
Tax effect		263			(2,108	)		2,774
Amortization of actuarial (gains)/losses included in net periodic pension cost, net		(444	)		3,406			(4,462	)
Amortization of prior service cost included in net periodic pension cost, gross		(859	)		(136	)		(170	)
Tax effect		324			52			65
Amortization of prior service cost included in net periodic pension cost, net		(535	)		(84	)		(105	)
Unamortized actuarial gain due to plan merger, gross		1,858			0			0
Tax Effect		(711	)		0			0
Unamortized actuarial gain due to plan merger, net		1,147			0			0
Other comprehensive income/(loss) related to pension and other post retirement obligations, net of taxes		168			3,322			(4,567	)
Unrealized (losses)/gains on securities:
Net unrealized holding losses arising during period, gross		(17,851	)		(24,042	)		(9,209	)
Tax effect		6,787			9,328			2,289
Net unrealized holding losses arising during period, net		(11,064	)		(14,714	)		(6,920	)
Reclassification adjustment for net (gains)/losses included in net income, gross		(2	)		0			4
Tax effect		1			0			(2	)
Reclassification adjustment for net gains/losses included in net income, net		(1	)		0			2
Other comprehensive (loss) related to unrealized (losses)/gains on available-for-sale securities, net of taxes		(11,065	)		(14,714	)		(6,918	)
Other comprehensive (loss), net of tax		(10,897	)		(11,392	)		(11,485	)
Net income		150,717			103,812			91,230
Comprehensive income	$	139,820		$	92,420		$	79,745

	As of December 31,
	2017			2016			2015
Accumulated Other Comprehensive Income/(Loss) By Component:
Unrealized loss for pension and other postretirement obligations	$	(28,677	)	$	(28,969	)	$	(34,347	)
Tax effect		7,044			11,008			13,064
Net unrealized loss for pension and other postretirement obligations		(21,633	)		(17,961	)		(21,283	)
Unrealized gain on available-for-sale securities		23,940			41,793			65,835
Tax effect		(6,006	)		(15,989	)		(25,317	)
Net unrealized gain on available-for-sale securities		17,934			25,804			40,518
Accumulated other comprehensive (loss)/income	$	(3,699	)	$	7,843		$	19,235

The accompanying notes are an integral part of the consolidated financial statements.

60

COMMUNITY BANK SYSTEM, INC.

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY

Years ended December 31, 2015, 2016 and 2017

(In Thousands, Except Share Data)

	Common Stock										Accumulated
	Shares Outstanding			Amount Issued		Additional Paid-in Capital		Retained Earnings			Other Comprehensive Income/(Loss)			Treasury Stock			Deferred Compensation Arrangements		Total
Balance at December 31, 2014		40,747,721		$	41,606	$	409,984	$	525,985		$	30,720		$	(20,391	)	$	0	$	987,904
Net income									91,230											91,230
Other comprehensive income, net of tax												(11,485	)							(11,485	)
Dividends declared:
Common, $1.22 per share									(50,624	)										(50,624	)
Common stock issued under employee stock plan, including tax benefits of $2,297		458,817			459		9,315													9,774
Stock-based compensation							4,201													4,201
Stock issued for acquisition		2,377,329			2,378		99,824													102,202
Treasury stock purchased		(265,230	)												(9,126	)				(9,126	)
Treasury stock issued to benefit plan		456,223					4,691								11,880					16,571
Balance at December 31, 2015		43,774,860			44,443		528,015		566,591			19,235			(17,637	)		0		1,140,647
Net income									103,812											103,812
Other comprehensive loss, net of tax												(11,392	)							(11,392	)
Dividends declared:
Common, $1.26 per share									(55,711	)										(55,711	)
Common stock issued under employee stock plan, including tax benefits of $3,091		507,784			507		10,036													10,543
Stock-based compensation							4,783													4,783
Treasury stock purchased		(67,826	)												(3,470	)				(3,470	)
Treasury stock issued to benefit plan		222,597					2,941								5,947					8,888
Balance at December 31, 2016		44,437,415			44,950		545,775		614,692			7,843			(15,160	)		0		1,198,100
Net income									150,717											150,717
Other comprehensive loss, net of tax												(10,897	)							(10,897	)
Reclassification related to tax effect of Tax Cuts and Jobs Act									645			(645	)							0
Dividends declared:
Common, $1.32 per share									(65,497	)										(65,497	)
Common stock issued under employee stock plan		264,640			265		4,298													4,563
Stock-based compensation							5,137													5,137
Stock issued for acquisitions		6,048,849			6,049		337,083													343,132
Deferred compensation arrangements acquired		(179,003	)												(10,022	)		10,022		0
Treasury stock purchased		(58,491	)												(3,306	)		3,306		0
Treasury stock issued to benefit plan		182,667					2,586								7,474			0		10,060
Balance at December 31, 2017		50,696,077		$	51,264	$	894,879	$	700,557		$	(3,699	)	$	(21,014	)	$	13,328	$	1,635,315

The accompanying notes are an integral part of the consolidated financial statements.

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COMMUNITY BANK SYSTEM, INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS

(In Thousands of Dollars)	Years Ended December 31,
	2017			2016			2015
Operating activities:
Net income	$	150,717		$	103,812		$	91,230
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation		16,024			14,398			13,132
Amortization of intangible assets		16,941			5,479			3,663
Net accretion on securities, loans and borrowings		(6,619	)		(4,405	)		(3,289	)
Stock-based compensation		5,137			4,783			4,201
Provision for loan losses		10,984			8,076			6,447
(Benefit)/provision for deferred income taxes		(28,692	)		13,066			10,716
Amortization of mortgage servicing rights		499			518			409
Income from bank-owned life insurance policies		(1,586	)		(1,505	)		(1,086	)
(Gain)/loss on sales of investment securities, net		(2	)		0			4
Net loss/(gain) on sale of loans and other assets		181			(837	)		(180	)
Change in other assets and liabilities		26,090			(7,614	)		(5,681	)
Net cash provided by operating activities		189,674			135,771			119,566
Investing activities:
Proceeds from sales of available-for-sale investment securities		0			0			221,136
Proceeds from maturities of available-for-sale investment securities		157,278			109,638			169,562
Proceeds from maturities of other securities		30,116			8,703			1,790
Purchases of available-for-sale investment securities		(90,380	)		(65,966	)		(503,000	)
Purchases of other securities		(13,302	)		(4,612	)		0
Net change in loans		164,846			(159,871	)		(176,754	)
Cash (paid)/received for acquisition, net of cash acquired of $52,132, $0, and $81,772,respectively		(107,414	)		(575	)		25,505
Settlement of bank owned life insurance policies		1,779			3,127			0
Purchases of premises and equipment, net		(10,819	)		(12,442	)		(12,400	)
Real estate limited partnership investments		(733	)		0			0
Net cash provided by/(used in) investing activities		131,371			(121,998	)		(274,161	)
Financing activities:
Net change in deposits		(79,940	)		202,480			238,969
Net change in borrowings, net of payments of $81,544, $0 and $0		(144,809	)		(155,100	)		(36,700	)
Issuance of common stock		4,563			10,543			9,774
Purchase of treasury stock		(3,306	)		(3,470	)		(9,126	)
Sale of treasury stock		10,060			8,888			16,571
Increase in deferred compensation agreements		3,306			0			0
Cash dividends paid		(62,305	)		(55,048	)		(49,273	)
Withholding taxes paid on share-based compensation		(1,433	)		(1,419	)		(806	)
Net cash (used in)/provided by financing activities		(273,864	)		6,874			169,409
Change in cash and cash equivalents		47,181			20,647			14,814
Cash and cash equivalents at beginning of year		173,857			153,210			138,396
Cash and cash equivalents at end of year	$	221,038		$	173,857		$	153,210
Supplemental disclosures of cash flow information:
Cash paid for interest	$	13,705		$	11,268		$	11,252
Cash paid for income taxes		41,231			32,239			28,891
Supplemental disclosures of noncash financing and investing activities:
Dividends declared and unpaid		17,460			14,268			13,605
Transfers from loans to other real estate		3,518			2,612			3,943
Acquisitions:
Common stock issued		343,132			0			102,202
Fair value of assets acquired, excluding acquired cash and intangibles		1,961,246			0			675,025
Fair value of liabilities assumed		1,871,685			0			700,574

The accompanying notes are an integral part of the consolidated financial statements.

62

COMMUNITY BANK SYSTEM, INC.

NOTE A: SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Nature of Operations

Community Bank System, Inc. (the “Company”) is a registered financial holding company which wholly-owns two significant consolidated subsidiaries: Community Bank, N.A. (the “Bank” or “CBNA”), and Benefit Plans Administrative Services, Inc. (“BPAS”).  As of December 31, 2017, BPAS owns five subsidiaries:  Benefit Plans Administrative Services, LLC (“BPA”), a provider of defined benefit contribution plan administration services; Northeast Retirement Services, LLC (“NRS”), a provider of institutional transfer agency, master recordkeeping services, fund administration, trust and retirement plan services; BPAS Actuarial & Pension Services, LLC (“BPAS-APS”), a provider of actuarial and benefit consulting services; BPAS Trust Company of Puerto Rico, a Puerto Rican trust company; and Hand Benefits & Trust Company (“HB&T”), a provider of collective investment fund administration and institutional trust services.  NRS owns one subsidiary, Global Trust Company, Inc. (“GTC”), a non-depository trust company which provides fiduciary services for collective investment trusts and other products.  HB&T owns one subsidiary, Hand Securities Inc. (“HSI”), an introducing broker-dealer.  The Company also wholly-owns three unconsolidated subsidiary business trusts formed for the purpose of issuing mandatorily-redeemable preferred securities which are considered Tier I capital under regulatory capital adequacy guidelines (see Note P).

As of December 31, 2017, the Bank operated 225 full service branches operating as Community Bank, N.A. throughout 35 counties of Upstate New York, six counties of Northeastern Pennsylvania, 12 counties of Vermont and one county of Western Massachusetts, offering a range of commercial and retail banking services.  The Bank owns the following operating subsidiaries:  The Carta Group, Inc. (“Carta Group”), CBNA Preferred Funding Corporation (“PFC”), CBNA Treasury Management Corporation (“TMC”), Community Investment Services, Inc. (“CISI”), NOTCH Investment Fund, LLC (“NOTCH”), Nottingham Advisors, Inc. (“Nottingham”), OneGroup NY, Inc. (“OneGroup”), and Oneida Preferred Funding II LLC (“OPFC II”).  OneGroup is a full-service insurance agency offering personal and commercial property insurance and other risk management products and services.  NOTCH, PFC and OPFC II primarily act as investors in residential and commercial real estate activities.  TMC provides cash management, investment, and treasury services to the Bank.  CISI and Carta Group provide broker-dealer and investment advisory services.  Nottingham provides asset management services to individuals, corporations, corporate pension and profit sharing plans, and foundations.

Principles of Consolidation

The consolidated financial statements include the accounts of the Company and its subsidiaries.  All intercompany accounts and transactions have been eliminated in consolidation.

Variable Interest Entities (“VIE”) are legal entities in which equity investors do not have the characteristics of a controlling financial interest or do not have sufficient equity at risk for the legal entities to finance its activities without additional subordinated financial support.  VIEs may be required to be consolidated by a company if it is determined the company is the primary beneficiary of a VIE.  The primary beneficiary of a VIE is the enterprise that has: (1) the power to direct the activities of the VIE that most significantly impact the VIE’s economic performance, and (2) the obligation to absorb losses of the VIE that could potentially be significant to the VIE or the right to receive benefits of the VIE that could potentially be significant to the VIE.  The Company’s VIE’s are described in more detail in Note T to the consolidated financial statements.

Critical Accounting Estimates in the Preparation of Financial Statements

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period.  Actual results could differ from those estimates.  Critical accounting estimates include the allowance for loan losses, actuarial assumptions associated with the pension, post-retirement and other employee benefit plans, the provision for income taxes, investment valuation and other-than-temporary impairment, the carrying value of goodwill and other intangible assets, and acquired loan valuations.

Risk and Uncertainties

In the normal course of its business, the Company encounters economic and regulatory risks.  There are three main components of economic risk: interest rate risk, credit risk and market risk.  The Company is subject to interest rate risk to the degree that its interest-bearing liabilities mature or reprice at different speeds, or on different basis, from its interest-earning assets.  The Company’s primary credit risk is the risk of default on the Company’s loan portfolio that results from the borrowers’ inability or unwillingness to make contractually required payments.  Market risk reflects potential changes in the value of collateral underlying loans, the fair value of investment securities, and loans held for sale.

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The Company is subject to regulations of various governmental agencies.  These regulations can change significantly from period to period.  The Company also undergoes periodic examinations by the regulatory agencies which may subject it to further changes with respect to asset valuations, amounts of required loan loss allowances, and operating restrictions resulting from the regulators’ judgments based on information available to them at the time of their examinations.

Revenue Recognition

The Company recognizes income on an accrual basis. CISI and Carta Group recognize fee income when investment and insurance products are sold to customers.  Nottingham provides asset management services to brokerage firms and clients and recognizes income ratably over the contract period during which service is performed.  Revenue from BPA’s administration and recordkeeping services is recognized ratably over the service contract period.  Revenue from consulting and actuarial services is recognized when services are rendered.  OneGroup recognizes commission revenue at the later of the effective date of the insurance policy, or the date on which the policy premium is billed to the customer.  At that date, the earnings process has been completed and the impact of refunds for policy cancellations can be reasonably estimated to establish reserves. The reserve for policy cancellations is based upon historical cancellation experience adjusted for known circumstances. All intercompany revenue and expense among related entities are eliminated in consolidation.

Cash and Cash Equivalents

For purposes of reporting cash flows, cash and cash equivalents include cash on hand, amounts due from banks, and highly liquid investments with original maturities of less than 90 days.  The carrying amounts reported in the consolidated statements of condition for cash and cash equivalents approximate those assets’ fair values.

Investment Securities

The Company can classify its investments in debt and equity securities as trading, held-to-maturity, or available-for-sale.  Held-to-maturity securities are those for which the Company has the positive intent and ability to hold until maturity, and are reported at amortized cost.  The Company did not use the held-to-maturity classification in 2016 or 2017.  Securities classified as available-for-sale are reported at fair value with net unrealized gains and losses reflected as a separate component of shareholders' equity, net of applicable income taxes.  None of the Company's investment securities have been classified as trading securities at December 31, 2017.  Certain equity securities are stated at cost and include restricted stock of the Federal Reserve Bank of New York (“Federal Reserve”) and the Federal Home Loan Bank of New York and the Federal Home Loan Bank of Boston (collectively referred to as “FHLB”).

Fair values for investment securities are based upon quoted market prices, where available.  If quoted market prices are not available, fair values are based upon quoted market prices of comparable instruments, or a discounted cash flow model using market estimates of interest rates and volatility.

The Company conducts an assessment of all securities in an unrealized lossposition to determine if other-than-temporary impairment (“OTTI”) exists on a quarterly basis. An unrealized loss exists when the current fair value of an individual security is less than its amortized cost basis.  The OTTI assessment considers the security structure, recent security collateral performance metrics, if applicable, external credit ratings, failure of the issuer to make scheduled interest or principal payments, judgment about and expectations of future performance, and relevant independent industry research, analysis, and forecasts. The severity of the impairment and the length of time the security has been impaired is also considered in the assessment.  The assessment of whether an OTTI decline exists is performed on each security, regardless of the classification of the security as available-for-sale or held-to-maturity, and involves a high degree of subjectivity and judgment that is based on the information available to management at a point in time.

An OTTI loss must be recognized for a debt security in an unrealized loss position if there is intent to sell the security or it is more likely than not the Company will be required to sell the security prior to recovery of its amortized cost basis. In this situation, the amount of loss recognized in income is equal to the difference between the fair value and the amortized cost basis of the security. Even if management does not have the intent, and it is not more likely than not that the Company will be required to sell the securities, an evaluation of the expected cash flows to be received is performed to determine if a credit loss has occurred. For debt securities, a critical component of the evaluation for OTTI is the identification of credit-impaired securities, where the Company does not expect to receive cash flows sufficient to recover the entire amortized cost basis of the security.  In the event of a credit loss, only the amount of impairment associated with the credit loss would be recognized in income. The portion of the unrealized loss relating to other factors, such as liquidity conditions in the market or changes in market interest rates, is recorded in accumulated other comprehensive loss.

Equity securities are also evaluated to determine whether the unrealized loss is expected to be recoverable based on whether evidence exists to support a realizable value equal to or greater than the amortized cost basis. If it is probable that the amortized cost basis will not be recovered, taking into consideration the estimated recovery period and the ability to hold the equity security until recovery, OTTI is recognized in earnings equal to the difference between the fair value and the amortized cost basis of the security.

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The specific identification method is used in determining the realized gains and losses on sales of investment securities and OTTI charges.  Premiums and discounts on securities are amortized and accreted, respectively, on the interest method basis over the period to maturity or estimated life of the related security.  Purchases and sales of securities are recognized on a trade date basis.

Loans

Loans are stated at unpaid principal balances, net of unearned income.  Mortgage loans held for sale are carried at fair value and are included in loans held for sale on the consolidated statements of condition.  Fair values for variable rate loans that reprice frequently are based on carrying values.  Fair values for fixed rate loans are estimated using discounted cash flows and interest rates currently being offered for loans with similar terms to borrowers of similar credit quality.  The carrying amount of accrued interest approximates its fair value.

Interest on loans is accrued and credited to operations based upon the principal amount outstanding.  Nonrefundable loan fees and related direct costs are deferred and included in the loan balances where they are amortized over the life of the loan as an adjustment to loan yield using the effective yield method.  Premiums and discounts on purchased loans are amortized using the effective yield method over the life of the loans.

Acquired loans

Acquired loans are initially recorded at their acquisition date fair values.  The carryover of allowance for loan losses is prohibited as any credit losses in the loans are included in the determination of the fair value of the loans at the acquisition date. Fair values for acquired loans are based on a discounted cash flow methodology that involves assumptions and judgments as to credit risk, prepayment risk, liquidity risk, default rates, loss severity, payment speeds, collateral values and discount rate.

Acquired impaired loans

Acquired loans that have evidence of deterioration in credit quality since origination and for which it is probable, at acquisition, that the Company will be unable to collect all contractually required payments are accounted for as impaired loans under ASC 310-30.  The excess of undiscounted cash flows expected at acquisition over the estimated fair value is referred to as the accretable discount and is recognized into interest income over the remaining life of the loans using the interest method. The difference between contractually required payments at acquisition and the undiscounted cash flows expected to be collected at acquisition is referred to as the non-accretable discount. The non-accretable discount represents estimated future credit losses and other contractually required payments that the Company does not expect to collect. Subsequent decreases in expected cash flows are recognized as impairments through a charge to the provision for loan losses resulting in an increase in the allowance for loan losses. Subsequent improvements in expected cash flows result in a recovery of previously recorded allowance for loan losses or a reversal of a corresponding amount of the non-accretable discount, which the Company then reclassifies as an accretable discount that is recognized into interest income over the remaining life of the loans using the interest method.

Acquired loans that met the criteria for non-accrual of interest prior to acquisition may be considered performing upon acquisition, regardless of whether the customer is contractually delinquent, if the Company can reasonably estimate the timing and amount of the expected cash flows on such loans and if the Company expects to fully collect the new carrying value of the loans. As such, the Company may no longer consider the loan to be non-accrual or non-performing and may accrue interest on these loans, including the impact of any accretable discount.

Acquired non-impaired loans

Acquired loans that do not meet the requirements under ASC 310-30 are considered acquired non-impaired loans. The difference between the acquisition date fair value and the outstanding balance represents the fair value adjustment for a loan and includes both credit and interest rate considerations. Fair value adjustments may be discounts (or premiums) to a loan’s cost basis and are accreted (or amortized) to net interest income (or expense) over the loan’s remaining life in accordance with ASC 310-20. Fair value adjustments for revolving loans are accreted (or amortized) using a straight line method. Term loans are accreted (or amortized) using the constant effective yield method.

Subsequent to the purchase date, the methods used to estimate the allowance for loan losses for the acquired non-impaired loans is consistent with the policy described below.  However, the Company compares the net realizable value of the loans to the carrying value, for loans collectively evaluated for impairment.  The carrying value represents the net of the loan’s unpaid principal balance and the remaining purchase discount (or premium) that has yet to be accreted (or amortized) into interest income (or interest expense).  When the carrying value exceeds the net realizable value, an allowance for loan losses is recognized.

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Impaired and Other Nonaccrual Loans

The Company places a loan on nonaccrual status when the loan becomes 90 days past due (or sooner, if management concludes collection is doubtful), except when, in the opinion of management, it is well-collateralized and in the process of collection. A loan may be placed on nonaccrual status earlier than ninety days past due if there is deterioration in the financial position of the borrower or if other conditions of the loan so warrant. When a loan is placed on nonaccrual status, uncollected accrued interest is reversed against interest income and the amortization of nonrefundable loan fees and related direct costs is discontinued. Interest income during the period the loan is on nonaccrual status is recorded on a cash basis after recovery of principal is reasonably assured. Nonaccrual loans are returned to accrual status when management determines that the borrower’s performance has improved and that both principal and interest are collectible.  This generally requires a sustained period of timely principal and interest payments and a well-documented credit evaluation of the borrower’s financial condition.

A loan is considered modified in a troubled debt restructuring (“TDR”) when, due to a borrower’s financial difficulties, the Company makes a concession(s) to the borrower that it would not otherwise consider.  These modifications may include, among others, an extension for the term of the loan, or granting a period when interest–only payments can be made with the principal payments and interest caught up over the remaining term of the loan or at maturity.  Generally, a nonaccrual loan that has been modified in a TDR remains on nonaccrual status for a period of 12 months to demonstrate that the borrower is able to meet the terms of the modified loan.  If the borrower’s ability to meet the revised payment schedule is uncertain, the loan remains on nonaccrual status.

Regulatory guidance issued by the OCC requires certain loans that have been discharged in Chapter 7 bankruptcy to be reported as TDRs.  In accordance with this guidance, loans that have been discharged in Chapter 7 bankruptcy but not reaffirmed by the borrower are classified as TDRs, irrespective of payment history or delinquency status, even if the repayment terms for the loan have not been otherwise modified and the Company’s lien position against the underlying collateral remains unchanged.  Pursuant to that guidance, the Company records a charge-off equal to any portion of the carrying value that exceeds the net realizable value of the collateral.

Commercial loans greater than $0.5 million are evaluated individually for impairment.  A loan is considered impaired, based on current information and events, if it is probable that the Company will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement.  The measurement of impaired loans is generally based upon the present value of expected future cash flows or the fair value of the collateral, if the loan is collateral-dependent.

The Company’s charge-off policy by loan type is as follows:

· Business lending loans are generally charged-off to the extent outstanding principal exceeds the fair value of estimated proceeds from collection efforts, including liquidation of collateral.  The charge-off is recognized when the loss becomes reasonably quantifiable.

· Consumer installment loans are generally charged-off to the extent outstanding principal exceeds the fair value of collateral, and are recognized by the end of the month in which the loan becomes 90 days past due.

· Consumer mortgage and home equity loans are generally charged-off to the extent outstanding principal exceeds the fair value of the property, less estimated costs to sell, and are recognized when the loan becomes 180 days past due.

Allowance for Loan Losses

Management continually evaluates the credit quality of the Company’s loan portfolio, and performs a formal review of the adequacy of the allowance for loan losses on a quarterly basis.  The allowance reflects management’s best estimate of probable losses inherent in the loan portfolio.  Determination of the allowance is subjective in nature and requires significant estimates.   The Company’s allowance methodology consists of two broad components - general and specific loan loss allocations.

The general loan loss allocation is composed of two calculations that are computed on five main loan segments:  business lending, consumer direct, consumer indirect, home equity and consumer mortgage.  The first calculation is quantitative and determines an allowance level based on the latest 36 months of historical net charge-off data for each loan class (commercial loans exclude balances with specific loan loss allocations).  The second calculation is qualitative and takes into consideration eight qualitative environmental factors:  levels and trends in delinquencies and impaired loans; levels of and trends in charge-offs and recoveries; trends in volume and terms of loans; effects of any changes in risk selection and underwriting standards, and other changes in lending policies, procedures, and practices; experience, ability, and depth of lending management and other relevant staff; national and local economic trends and conditions; industry conditions; and effects of changes in credit concentrations.    A component of the qualitative calculation is the unallocated allowance for loan loss.  The qualitative and quantitative calculations are added together to determine the general loan loss allocation.  The specific loan loss allocation relates to individual commercial loans that are both greater than $0.5 million and in a nonaccruing status with respect to interest.  Specific loan losses are based on discounted estimated cash flows, including any cash flows resulting from the conversion of collateral or collateral shortfalls.  The allowance levels computed from the specific and general loan loss allocation methods are combined with unallocated allowances and allowances needed for acquired loans to derive the total required allowance for loan losses to be reflected on the Consolidated Statement of Condition.

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Loan losses are charged off against the allowance, while recoveries of amounts previously charged off are credited to the allowance.  A provision for loan losses is charged to operations based on management’s periodic evaluation of factors previously mentioned.

Intangible Assets

Intangible assets include core deposit intangibles, customer relationship intangibles and goodwill arising from acquisitions. Core deposit intangibles and customer relationship intangibles are amortized on either an accelerated or straight-line basis over periods ranging from seven to 20 years. The initial and ongoing carrying value of goodwill and other intangible assets is based upon discounted cash flow modeling techniques that require management to make estimates regarding the amount and timing of expected future cash flows.  It also requires use of a discount rate that reflects the current return requirements of the market in relation to present risk-free interest rates, required equity market premiums, peer volatility indicators, and company-specific risk indicators.

The Company evaluates goodwill for impairment on an annual basis, or more often if events or circumstances indicate there may be impairment.  The implied fair value of a reporting unit’s goodwill is compared to its carrying amount and the impairment loss is measured by the excess of the carrying value over fair value.  The fair value of each reporting unit is compared to the carrying amount of that reporting unit in order to determine if impairment is indicated.

Premises and Equipment

Premises and equipment are stated at cost less accumulated depreciation.  Computer software costs that are capitalized only include external direct costs of obtaining and installing the software.  The Company has not developed any internal use software.  Depreciation is calculated using the straight-line method over the estimated useful lives of the assets.  Useful lives range from three to 10 years for equipment; three to seven years for software and hardware; and 10 to 40 years for building and building improvements.  Land improvements are depreciated over 20 years and leasehold improvements are amortized over the shorter of the term of the respective lease plus any optional renewal periods that are reasonably assured or life of the asset. Maintenance and repairs are charged to expense as incurred.

Other Real Estate

Other real estate owned is comprised of properties acquired through foreclosure, or by deed in lieu of foreclosure.  These assets are carried at fair value less estimated costs of disposal.  At foreclosure, if the fair value, less estimated costs to sell, of the real estate acquired is less than the Company’s recorded investment in the related loan, a write-down is recognized through a charge to the allowance for loan losses.  Any subsequent reduction in value is recognized by a charge to income.  Operating costs associated with the properties are charged to expense as incurred.  At December 31, 2017 and 2016, other real estate amounted to $1.9 million and $2.0 million, respectively, and is included in other assets.

Mortgage Servicing Rights

Originated mortgage servicing rights are recorded at their fair value at the time of sale of the underlying loan, and are amortized in proportion to and over the period of estimated net servicing income or loss.  The Company uses a valuation model that calculates the present value of future cash flows to determine the fair value of servicing rights.  In using this valuation method, the Company incorporates assumptions that market participants would use in estimating future net servicing income, which includes estimates of the servicing cost per loan, the discount rate, and prepayment speeds.  The carrying value of the originated mortgage servicing rights is included in other assets and is evaluated quarterly for impairment using these same market assumptions.  The amount of impairment recognized is the amount by which the carrying value of the capitalized servicing rights for a stratum exceeds estimated fair value.  Impairment is recognized through a valuation allowance.

Treasury Stock

Repurchases of shares of the Company’s common stock are recorded at cost as a reduction of shareholders’ equity.  Reissuance of shares of treasury stock is recorded at average cost.

Income Taxes

The Company and its subsidiaries file a consolidated federal income tax return.  Provisions for income taxes are based on taxes currently payable or refundable as well as deferred taxes that are based on temporary differences between the tax basis of assets and liabilities and their reported amounts in the consolidated financial statements.  Deferred tax assets and liabilities are reported in the consolidated financial statements at currently enacted income tax rates applicable to the period in which the deferred tax assets and liabilities are expected to be realized or settled.

Benefits from tax positions should be recognized in the financial statements only when it is more likely than not that the tax position will be sustained upon examination by the appropriate taxing authority having full knowledge of all relevant information. A tax position meeting the more-likely-than-not recognition threshold should be measured at the largest amount of benefit for which the likelihood of realization upon ultimate settlement exceeds 50 percent.

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Investments in Real Estate Limited Partnerships

The Company has investments in various real estate limited partnerships that acquire, develop, own and operate low and moderate-income housing.  The Company’s ownership interest in these limited partnerships ranges from 5.00% to 99.99% as of December 31, 2017.  These investments are made directly in Low Income Housing Tax Credit, or LIHTC, partnerships formed by third parties.  As a limited partner in these operating partnerships, we receive tax credits and tax deductions for losses incurred by the underlying properties.

The Company accounts for its ownership interest in LIHTC partnerships in accordance with Accounting Standards Update (“ASU”) 2014-01, Investments – Equity Method and Joint Ventures (Topic 323):  Accounting for Investments in Qualified Affordable Housing Projects.  The standard permits an entity to amortize the initial cost of the investment in proportion to the amount of the tax credits and other tax benefits received and recognize the net investment performance in the income statement as a component of income tax expense.  The Company has unfunded commitments of $3.2 million at year-end related to qualified affordable housing project investments, which will be funded in 2018.  There were no impairment losses during the year resulting from the forfeiture or ineligibility of tax credits related to qualified affordable housing project investments.

Repurchase Agreements

The Company sells certain securities under agreements to repurchase.  These agreements are treated as collateralized financing transactions.  These secured borrowings are reflected as liabilities in the accompanying consolidated statements of condition and are recorded at the amount of cash received in connection with the transaction.  Short-term securities sold under agreements to repurchase generally mature within one day from the transaction date.  Securities, generally U.S. government and federal agency securities, pledged as collateral under these financing arrangements can be repledged by the secured party.  Additional collateral may be required based on the fair value of the underlying securities.

Retirement Benefits

The Company provides defined benefit pension benefits to eligible employees and post-retirement health and life insurance benefits to certain eligible retirees.  The Company also provides deferred compensation and supplemental executive retirement plans for selected current and former employees, officers, and directors.  Expense under these plans is charged to current operations and consists of several components of net periodic benefit cost based on various actuarial assumptions regarding future experience under the plans, including discount rate, rate of future compensation increases and expected return on plan assets.

Derivative Financial Instruments and Hedging Activities

The Company accounts for derivative financial instruments at fair value.  If certain conditions are met, a derivative may be specifically designated as (1) a hedge of the exposure to changes in the fair value of a recognized asset or liability or an unrecognized firm commitment (“fair value hedge”), (2) a hedge of the exposure to variable cash flows of a forecasted transaction or the variability of cash flows to be received or paid related to a recognized asset or liability (“cash flow hedge”), or (3) an instrument with no hedging designation (“stand-alone derivative”).  For a fair value hedge, the gain or loss on the derivative, as well as the offsetting loss or gain on the hedged item, are recognized in current earnings as fair values change.  For a cash flow hedge, the gain or loss on the derivative is reported in other comprehensive income and is reclassified into earnings in the same periods during which the hedged transaction affects earnings.  For both types of hedges, changes in the fair value of derivatives that are not highly effective in hedging the changes in fair value or expected cash flows of the hedged item are recognized immediately in current earnings.  Changes in the fair value of derivatives that do not qualify for hedge accounting are reported currently in earnings, as noninterest income.

Net cash settlements on derivatives that qualify for hedge accounting are recorded in interest income or interest expense, based on the item being hedged.  Net cash settlements on derivatives that do not qualify for hedge accounting are reported in noninterest income.  Cash flows on hedges are classified in the consolidated statement of cash flow statement the same as the cash flows of the items being hedged.

The Company formally documents the relationship between derivatives and hedged items, as well as the risk-management objective and strategy for undertaking hedge transactions at the inception of the hedging relationship.  This documentation includes linking the fair value or cash flow hedges to specific assets and liabilities on the statement of condition or to specific commitments or forecasted transactions.  The Company also formally assesses, both at the hedge’s inception and on an ongoing basis, whether the derivative instruments that are used are highly effective in offsetting changes in fair values or cash flows of the hedged items.

When hedge accounting is discontinued, subsequent changes in fair value of the derivative are recorded in noninterest income.  When a fair value hedge is discontinued, the hedged asset or liability is no longer adjusted for changes in fair value and the existing basis adjustment is amortized or accreted over the remaining life of the asset or liability.  When a cash flow hedge is discontinued, but the hedged cash flows or forecasted transactions are still expected to occur, gains or losses that were accumulated in other comprehensive income are amortized into earnings over the same periods which the hedged transactions will affect earnings.

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Assets Under Management or Administration

Assets held in fiduciary or agency capacities for customers are not included in the accompanying consolidated statements of condition as they are not assets of the Company.  All fees associated with providing asset management services are recorded on an accrual basis of accounting and are included in noninterest income.

Advertising

Advertising costs amounting to approximately $5.7 million, $3.9 million and $3.6 million for the years ending December 31, 2017, 2016 and 2015, respectively, are nondirect response in nature and expensed as incurred.

Bank Owned Life Insurance

The Company owns life insurance policies on certain current and former employees and directors where the Bank is the beneficiary.  Bank owned life insurance is recorded at the amount that can be realized under the insurance contract at the balance sheet date, which is the cash surrender value (“CSV”) adjusted for other charges or other amounts due that are probable at settlement.  Increases in the CSV of the policies, as well as the death benefits received, net of any CSV, are recorded in noninterest income, and are not subject to income taxes.

Earnings Per Share

Using the two-class method, basic earnings per common share is computed based upon net income available to common shareholders divided by the weighted average number of common shares outstanding during each period, which excludes the outstanding unvested restricted stock.  Diluted earnings per share is computed using the weighted average number of common shares determined for the basic earnings per common share computation plus the dilutive effect of stock options using the treasury stock method.  Stock options where the exercise price is greater than the average market price of common shares were not included in the computation of earnings per diluted share as they would have been anti-dilutive. Shares held in rabbi trusts related to deferred compensation plans are considered outstanding for purposes of computing earnings per share.

Stock-based Compensation

Companies are required to measure and record compensation expense for stock options and other share-based payments on the instruments’ fair value on the date of grant.  Stock-based compensation expense is recognized ratably over the requisite service period for all awards (see Note L).

Fair Values of Financial Instruments

The Company determines fair values based on quoted market values where available or on estimates using present values or other valuation techniques.  Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows.  In that regard, the derived fair value estimates cannot be substantiated by comparison to independent markets and, in many cases, could not be realized in immediate settlement of the instrument.  Certain financial instruments and all nonfinancial instruments are excluded from this disclosure requirement.  Accordingly, the aggregate fair value amounts presented do not represent the underlying value of the Company.  The fair values of investment securities, loans, deposits, and borrowings have been disclosed in Note R.

Reclassifications

Certain reclassifications have been made to prior years’ balances to conform to the current year presentation.

Recently Adopted Accounting Pronouncements

In March 2016, the FASB issued ASU 2016-09, Compensation – Stock Compensation (Topic 718).  The amendments simplify several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, accounting for award forfeitures, and classification on the statement of cash flows.  The amendments were effective for public business entities for the first interim and annual reporting periods beginning after December 15, 2016 and the Company adopted the amendments as of January 1, 2017.  The new guidance requires entities to prospectively recognize all excess tax benefits and tax deficiencies related to share-based payment awards as income tax benefit or expense in the statement of income when the awards vest or are settled.  Previously, income tax benefits (or deficiencies) were reported as increases (or decreases) to additional paid-in capital to the extent that those benefits were greater than (or less than) the income tax benefits recognized in earnings during the awards’ vesting periods.  In addition, excess tax benefits and deficiencies are to be classified as an operating activity in the statement of cash flows, rather than a financing activity as required under prior accounting guidance.  The new guidance also requires employee taxes paid when an employer withholds shares for withholding tax purposes to be classified as a financing activity in the statement of cash flows.  The Company has elected to apply the changes in presentation on the consolidated statement of cash flows for excess tax benefits and deficiencies and employee taxes paid when an employer withholds shares on a retrospective basis.  The Company has also elected to continue to incorporate estimated forfeitures in the accrual of compensation expense, and this election had no impact on the Company’s consolidated financial statements.  For the year ended December 31, 2017, the effect on net income from excess tax benefits was $3.1 million, or approximately $0.06 per diluted common share.

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In February 2018, the FASB issued ASU 2018-02, Income Statement – Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income.  The ASU required a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the reduction in the corporate income tax rate to 21% with the newly enacted Tax Cuts and Jobs Act.  This guidance is effective for fiscal years beginning after December 15, 2018; however, the Company chose to early adopt the new standard for the year ended December 31, 2017, as allowed under the new standard.  The amount of the reclassification for the Company was $0.6 million, as shown in the Consolidated Statement of Changes in Stockholder's Equity.

New Accounting Pronouncements

In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606).  This new guidance supersedes the revenue recognition requirements in ASC 605, Revenue Recognition, and is based on the principle that revenue is recognized to depict the transfer of goods or services to customers in an amount that reflects consideration to which the entity expects to be entitled in exchange for those goods and services. The ASU also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments and assets recognized from costs incurred to obtain or fulfill a contract.  This guidance is effective for the Company for annual and interim periods beginning after December 15, 2017.  The Company has finalized its in-depth assessment and identified the revenue line items within the scope of this new guidance.  Neither the new standard, nor any of the amendments, resulted in a material change from the Company’s current accounting for revenues because no changes in accounting were required for those financial instruments that were within scope of Topic 606.  The Company adopted this guidance on January 1, 2018 and has elected to implement using the modified retrospective application, with the cumulative effect recorded as an adjustment to opening retained earnings at January 1, 2018.  Due to immateriality, the Company will have no cumulative effect to record.  The Company is still finalizing the changes to the related disclosures.

In January 2016, the FASB issued ASU 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. This guidance addresses certain aspects of recognition, measurement, presentation and disclosure of financial instruments. The primary focus of this guidance is to supersede the guidance to classify equity securities with readily determinable fair values into different categories (trading or available-for-sale) and requires equity securities to be measured at fair value with changes in the fair value recognized through net income. This guidance requires adoption through a cumulative-effect adjustment to the balance sheet as of the beginning of the fiscal year of adoption.  This ASU is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years.  Early adoption is permitted for all companies in any interim or annual period. The Company has completed its evaluation of adoption of the new guidance on the Company’s consolidated financial statements and the impact was considered immaterial.

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). This new guidance supersedes the lease requirements in Topic 840, Leases and is based on the principle that a lessee should recognize in the statement of financial position a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term.  The accounting applied by a lessor is largely unchanged from that applied under the previous guidance.  In addition, the guidance requires an entity to separate the lease components from the nonlease components in a contract.  The ASU requires disclosures about the amount, timing, and judgments related to a reporting entity’s accounting for leases and related cash flows.  The standard is required to be applied to all leases in existence as of the date of adoption using a modified retrospective transition approach.  This guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted for all companies in any interim or annual period.  The Company occupies certain offices and uses certain equipment under non-cancelable operating lease agreements, which currently are not reflected in its consolidated statement of condition.  The Company expects to recognize lease liabilities and right of use assets associated with these lease agreements; however, the extent of the impact on the Company’s consolidated financial statements is currently under evaluation.

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments – Credit Losses (Topic 326).  This new guidance significantly changes how entities will measure credit losses for most financial assets and certain other instruments that are not measured at fair value through net income.  This ASU will replace the “incurred loss” model under existing guidance with an “expected loss” model for instruments measured at amortized cost, and require entities to record allowances for available-for-sale debt securities rather than reduce the carrying amount, as they do today under the other-than-temporary impairment model.  This ASU also simplifies the accounting model for purchased credit-impaired debt securities and loans.  This guidance requires adoption through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is adopted.  This ASU is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years.  Early adoption is permitted for all companies as of fiscal years beginning after December 15, 2018, including interim periods within those fiscal years.  The Company is currently evaluating the impact the guidance will have on the Company’s consolidated financial statements, and expects a change in the allowance for loan losses resulting from the change to expected losses for the estimated life of the financial asset, including an allowance for debt securities. The amount of the change in the allowance for loan losses resulting from the new guidance will be impacted by the portfolio composition and asset quality at the adoption date, as well as economic conditions and forecasts at the time of adoption.

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In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230). The amendments provide guidance on the following eight specific cash flow issues: 1) debt prepayment or debt extinguishment costs; 2) settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effective interest rate of the borrowing; 3) contingent consideration payments made after a business combination; 4) proceeds from the settlement of insurance claims; 5) proceeds from the settlement of corporate-owned life insurance policies, including bank-owned life insurance policies; 6) distributions received from equity method investees; 7) beneficial interests in securitization transactions; and 8) separately identifiable cash flows and application of the predominance principle. This ASU is effective for fiscal years beginning after December 31, 2017, including interim periods within those fiscal years.  The Company adopted this guidance on January 1, 2018.  As this guidance only affects the classification within the statement of cash flows, this ASU will not have a material impact on the Company’s consolidated financial statements.

In January 2017, the FASB issued ASU No. 2017-04, Intangibles-Goodwill and Other (Topic 350). The amendments simplify how an entity is required to test goodwill for impairment by eliminating the requirement to measure a goodwill impairment loss by comparing the implied fair value of a reporting unit’s goodwill with the carrying amount of that goodwill.  Instead, an entity will perform its goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount, and recognize an impairment charge for the amount by which the carrying amount of the reporting unit exceeds its fair value.  Impairment loss recognized under this new guidance will be limited to the goodwill allocated to the reporting unit.  This ASU is effective prospectively for the Company for annual or interim goodwill impairment tests in fiscal years beginning after December 15, 2019.  Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017.  This ASU did not have a material impact on the Company’s consolidated financial statements.

In March 2017, the FASB issued ASU No. 2017-07, Compensation – Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost.  This new guidance requires the service cost component of net periodic pension and postretirement benefit costs to be presented separately from other components of net benefit cost in the statement of income.  This ASU is effective for the Company for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years.  The Company adopted this guidance on January 1, 2018.  This ASU will not have a material impact on the Company’s consolidated financial statements.

In August 2017, the FASB issued ASU No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities.  This new guidance amends current guidance to better align hedge accounting with risk management activities and reduce the complexity involved in applying hedge accounting.  Under this new guidance, the concept of hedge ineffectiveness will be eliminated.  Ineffective income generated by cash flow and net investment hedges will be recognized in the same financial reporting period and income statement line item as effective income, so as to reflect the full cost of hedging at one time and in one place. Ineffective income generated by fair value hedges will continue to be reflected in current period earnings; however, it will be recognized in the same income statement line item as effective income. The guidance will also allow any contractually specified variable rate to be designated as the hedged risk in a cash flow hedge.  With respect to fair value hedges of interest rate risk, the guidance will allow changes in the fair value of the hedged item to be calculated solely using changes in the benchmark interest rate component of the instrument’s total contractual coupon cash flows. This ASU is effective for the Company for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years.  Early adoption is permitted, including adoption in an interim period.  This ASU is not expected to have a material impact on the Company’s consolidated financial statements.

NOTE B: ACQUISITIONS

On December 4, 2017, the Company, through its subsidiary, OneGroup, completed its acquisition of Gordon B. Roberts Agency, Inc. (“GBR”), an insurance agency headquartered in Oneonta, New York for $3.7 million in Company stock and cash, comprised of $1.35 million in cash and the issuance of 0.04 million shares of common stock.  The transaction resulted in the acquisition of $0.6 million of assets, $0.7 million of other liabilities, goodwill in the amount of $2.2 million and other intangible assets of $1.6 million.  The effects of the acquired assets and liabilities have been included in the consolidated financial statements since that date.

On November 17, 2017, the Company, through its subsidiary, CISI, completed its acquisition of certain assets of Northeast Capital Management, Inc. (“NECM”), a financial services business headquartered in Wilkes Barre, Pennsylvania.  The Company agreed to pay $1.2 million in cash, including a $0.2 million contingent payment based on certain customer retention objectives, to acquire a customer list from NECM, and recorded a $1.2 million customer list intangible asset in conjunction with the acquisition.  The effects of the acquired assets have been included in the consolidated financial statements since that date.

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On May 12, 2017, the Company completed its acquisition of Merchants Bancshares, Inc. (“Merchants”), parent company of Merchants Bank, headquartered in South Burlington, Vermont, for $345.2 million in Company stock and cash, comprised of $82.9 million in cash and the issuance of 4.68 million shares of common stock.  The acquisition extends the Company’s footprint into the Vermont and Western Massachusetts markets with the addition of 31 branch locations in Vermont and one location in Massachusetts.  This transaction resulted in the acquisition of $2.0 billion of assets, including $1.49 billion of loans and $370.6 million of investment securities, as well as $1.45 billion of deposits and $189.0 million in goodwill.  The effects of the acquired assets and liabilities have been included in the consolidated financial statements since that date.  Revenues of approximately $42.6 million and direct expenses, which may not include certain shared expenses, of approximately $19.9 million from Merchants were included in the consolidated income statement for the year ended December 31, 2017.

On March 1, 2017, the Company, through its subsidiary, OneGroup, completed its acquisition of certain assets of Dryfoos Insurance Agency, Inc. (“Dryfoos”), an insurance agency headquartered in Hazleton, Pennsylvania.  The Company paid $3.0 million in cash to acquire the assets of Dryfoos, and recorded goodwill in the amount of $1.7 million and other intangible assets of $1.7 million in conjunction with the acquisition.  The effects of the acquired assets and liabilities have been included in the consolidated financial statements since that date.

On February 3, 2017, the Company completed its acquisition of NRS and its subsidiary GTC, headquartered in Woburn, Massachusetts, for $148.6 million in Company stock and cash.  NRS was a privately held corporation focused on providing institutional transfer agency, master recordkeeping services, custom target date fund administration, trust product administration and customized reporting services to institutional clients.  Its wholly-owned subsidiary, GTC, is chartered in the State of Maine as a non-depository trust company and provides fiduciary services for collective investment trusts and other products.  The acquisition of NRS and GTC, hereafter referred to collectively as NRS, will strengthen and complement the Company’s existing employee benefit services businesses.  Upon the completion of the merger, NRS became a wholly-owned subsidiary of BPAS and operates as Northeast Retirement Services, LLC, a Delaware limited liability company.  This transaction resulted in the acquisition of $36.1 million in net tangible assets, principally cash and certificates of deposit, $60.2 million in customer list intangibles that will be amortized using the 150% declining balance method over 10 years, a $24.2 million deferred tax liability associated with the customer list intangible, and $76.4 million in goodwill.  The effects of the acquired assets and liabilities have been included in the consolidated financial statements since that date. Revenues of $31.5 million and expenses of $21.5 million from NRS were included in the consolidated statement of income for the year ended December 31, 2017.

On January 1, 2017, the Company, through its subsidiary, OneGroup, acquired certain assets of Benefits Advisory Service, Inc. (“BAS”), a benefits consulting group headquartered in Forest Hills, New York.  The Company paid $1.2 million in cash to acquire the assets of BAS and recorded intangible assets of $1.2 million in conjunction with the acquisition.  The effects of the acquired assets and liabilities have been included in the consolidated financial statements since that date.

On January 4, 2016, the Company, through its subsidiary, CBNA Insurance Agency, Inc. (“CBNA Insurance”), completed its acquisition of WJL Agencies Inc. doing business as The Clark Insurance Agencies (“WJL”), an insurance agency operating in Canton, New York. The Company paid $0.6 million in cash for the intangible assets of the company.  Goodwill in the amount of $0.3 million and intangible assets in the amount of $0.3 million were recorded in conjunction with the acquisition.  The effects of the acquired assets and liabilities have been included in the consolidated financial statements since that date.  On August 19, 2016, the Company merged together its insurance subsidiaries and as of that date, the activities of CBNA Insurance were merged into OneGroup.

On December 4, 2015, the Company completed its acquisition of Oneida Financial Corp. (“Oneida”), parent company of Oneida Savings Bank, headquartered in Oneida, New York for $158.5 million in Company stock and cash, comprised of $56.3 million of cash and the issuance of 2.38 million common shares.  Upon the completion of the merger, the Bank added 12 branch locations in Oneida and Madison counties and approximately $769.4 million of assets, including approximately $399.4 million of loans and $225.7 million of investment securities, along with $699.2 million of deposits.  Through the acquisition of Oneida, the Company acquired OneGroup and Oneida Wealth Management, Inc. (“OWM”) as wholly-owned subsidiaries primarily engaged in offering insurance and investment advisory services.  These subsidiaries complement the Company’s other non-banking financial services businesses. The effects of the acquired assets and liabilities have been included in the consolidated financial statements since that date.  On April 22, 2016, the activities of OWM were merged into CISI.

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The assets and liabilities assumed in the acquisitions were recorded at their estimated fair values based on management's best estimates using information available at the dates of the acquisition, and were subject to adjustment based on updated information not available at the time of acquisition.  During the second quarter of 2017, the carrying amount of other assets decreased by $2.7 million and other liabilities decreased by $2.4 million as a result of a reclassification of amounts from other assets into other liabilities, and an adjustment to other liabilities as a result of updated information not available at the time of acquisition.  Goodwill associated with the NRS acquisition increased $0.3 million during the second quarter as a result of these changes in fair value.  During the third quarter of 2017, the carrying amount of investments increased by $0.2 million as a result of updated information not available at the time of acquisition, the carrying amount of loans decreased $0.6 million as a result of an adjustment to the valuation of acquired impaired loans, the carrying amount of premises and equipment increased $3.6 million as a result of updated appraisal information not available at the time of acquisition, and the value of other assets and other liabilities increased $5.5 million and $6.6 million, respectively, as a result of adjustments to accrued income taxes, deferred taxes and certain tax credit arrangements that were recorded on a provisional basis.  Goodwill associated with the NRS and Merchants acquisitions decreased $0.1 million and $2.0 million during the third quarter, respectively, as a result of these changes in fair value estimates.  During the fourth quarter of 2017, the carrying amount of loans decreased $0.5 million as a result of an adjustment to the valuation of acquired impaired loans and the value of other assets and other liabilities decreased $0.3 million and $0.02 million, respectively, as a result of adjustments to deferred taxes and certain tax credit arrangements.  Goodwill associated with the Merchants acquisition increased $0.8 million during the fourth quarter as a result of these changes in fair value estimates.

The above referenced acquisitions expanded the Company’s geographical presence in New York, Pennsylvania, Vermont, and Western Massachusetts and management expects that the Company will benefit from greater geographic diversity and the advantages of other synergistic business development opportunities.

The following table summarizes the estimated fair value of the assets acquired and liabilities assumed after considering the measurement period adjustments described above:

	2017												2016		2015
(000s omitted)	NRS			Merchants			Other (1)			Total			WJL		Oneida
Consideration paid :
Cash (2)	$	70,073		$	82,898		$	6,775		$	159,746		$	575	$	56,266
Community Bank System, Inc. common stock		78,483			262,254			2,395			343,132			0		102,202
Total net consideration paid		148,556			345,152			9,170			502,878			575		158,468
Recognized amounts of identifiable assets acquired and liabilities assumed:
Cash and cash equivalents		11,063			40,730			339			52,132			0		81,772
Investment securities		20,294			370,648			0			390,942			0		225,729
Loans		0			1,488,157			0			1,488,157			0		399,422
Premises and equipment		411			16,608			27			17,046			0		22,212
Accrued interest receivable		72			4,773			0			4,845			0		1,133
Other assets		8,088			51,585			583			60,256			0		26,529
Core deposit intangibles		0			23,214			0			23,214			0		2,570
Other intangibles		60,200			2,857			5,626			68,683			288		9,994
Deposits		0			(1,448,406	)		0			(1,448,406	)		0		(699,241	)
Other liabilities		(28,002	)		(11,750	)		(1,217	)		(40,969	)		0		(1,333	)
Short-term advances		0			(80,000	)		0			(80,000	)		0		0
Securities sold under agreement to repurchase, short-term		0			(278,076	)		0			(278,076	)		0		0
Long-term debt		0			(3,615	)		0			(3,615	)		0		0
Subordinated debt held by unconsolidated subsidiary trusts		0			(20,619	)		0			(20,619	)		0		0
Total identifiable assets, net		72,126			156,106			5,358			233,590			288		68,787
Goodwill	$	76,430		$	189,046		$	3,812		$	269,288		$	287	$	89,681

⁽¹⁾ Includes amounts related to the BAS, Dryfoos, NECM and GBR acquisitions.

⁽²⁾ Includes NECM $0.2 million contingent cash payment consideration.

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Acquired loans that have evidence of deterioration in credit quality since origination and for which it is probable, at acquisition, that the Company will be unable to collect all contractually required payments were aggregated by comparable characteristics and  recorded at fair value without a carryover of the related allowance for loan losses.  Cash flows for each loan were determined using an estimate of credit losses and rate of prepayments.  Projected monthly cash flows were then discounted to present value using a market-based discount rate.  The excess of the undiscounted expected cash flows over the estimated fair value is referred to as the “accretable yield” and is recognized into interest income over the remaining lives of the acquired loans.

The following is a summary of the loans acquired from Merchants at the date of acquisition:

(000s omitted)	Acquired Impaired Loans			Acquired Non-impaired Loans			Total Acquired Loans
Contractually required principal and interest at acquisition	$	15,454		$	1,872,574		$	1,888,028
Contractual cash flows not expected to be collected		(5,385	)		(14,753	)		(20,138	)
Expected cash flows at acquisition		10,069			1,857,821			1,867,890
Interest component of expected cash flows		(793	)		(378,940	)		(379,733	)
Fair value of acquired loans	$	9,276		$	1,478,881		$	1,488,157

The fair value of checking, savings and money market deposit accounts acquired were assumed to approximate the carrying value as these accounts have no stated maturity and are payable on demand.  Certificate of deposit accounts were valued at the present value of the certificates’ expected contractual payments discounted at market rates for similar certificates.

The core deposit intangibles and other intangibles related to the Merchants, Dryfoos, BAS, WJL and Oneida acquisitions are being amortized using an accelerated method over their estimated useful life of eight years.  The goodwill, which is not amortized for book purposes, was assigned to the Banking segment for the Merchants and Oneida acquisitions, the Employee Benefit Services segment for NRS, and All Other segments for the Dryfoos, BAS, and WJL acquisitions.  Goodwill arising from the Merchants, NRS, GBR and Oneida acquisitions is not deductible for tax purposes.  Goodwill arising from the Dryfoos, BAS and WJL acquisitions is deductible for tax purposes.

Direct costs related to the acquisitions were expensed as incurred.  Merger and acquisition integration-related expenses amount to $26.0 million, $1.7 million and $7.0 million during 2017, 2016 and 2015, respectively, and have been separately stated in the consolidated statements of income.

Supplemental Pro Forma Financial Information

The following unaudited condensed pro forma information assumes the Merchants and NRS acquisitions had been completed as of January 1, 2016 for the year ended December 31, 2017 and December 31, 2016.  The pro forma information does not include amounts related to BAS, Dryfoos, NECM and GBR as the amounts were immaterial. The table below has been prepared for comparative purposes only and is not necessarily indicative of the actual results that would have been attained had the acquisitions occurred as of the beginning of the year presented, nor is it indicative of the Company’s future results. Furthermore, the unaudited pro forma information does not reflect management’s estimate of any revenue-enhancing opportunities nor anticipated cost savings that may have occurred as a result of the integration and consolidation of the acquisitions.

The pro forma information set forth below reflects the historical results of Merchants and NRS combined with the Company’s consolidated statement of income with adjustments related to (a) certain purchase accounting fair value adjustments and (b) amortization of customer lists and core deposit intangibles.  Acquisition expenses related to the Merchants and NRS transactions totaling $25.7 million for the year ended December 31, 2017 were included in the pro forma information as if they were incurred in 2016.

	Pro Forma (Unaudited) Year Ended December 31,
(000’s omitted)	2017		2016
Total revenue, net of interest expense	$	546,977	$	536,183
Net income		176,257		109,186

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NOTE C: INVESTMENT SECURITIES

The amortized cost and estimated fair value of investment securities as of December 31 are as follows:

	2017								2016
(000's omitted)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value		Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Available-for-Sale Portfolio:
U.S. Treasury and agency securities	$	2,043,023	$	15,886	$	4,838	$	2,054,071	$	1,876,358	$	28,522	$	2,118	$	1,902,762
Obligations of state and political subdivisions		514,949		14,064		57		528,956		582,655		13,389		1,054		594,990
Government agency mortgage-backed securities		358,180		3,121		3,763		357,538		232,657		5,040		2,467		235,230
Corporate debt securities		2,648		0		25		2,623		5,716		2		31		5,687
Government agency collateralized mortgage obligations		88,097		155		878		87,374		9,225		310		0		9,535
Marketable equity securities		251		275		0		526		252		200		0		452
Total available-for-sale portfolio	$	3,007,148	$	33,501	$	9,561	$	3,031,088	$	2,706,863	$	47,463	$	5,670	$	2,748,656
Other Securities:
Federal Home Loan Bank common stock	$	9,896					$	9,896	$	12,191					$	12,191
Federal Reserve Bank common stock		30,690						30,690		19,781						19,781
Certificates of deposit		3,865						3,865		0						0
Other equity securities		5,840						5,840		3,764						3,764
Total other securities	$	50,291					$	50,291	$	35,736					$	35,736

A summary of investment securities that have been in a continuous unrealized loss position for less than or greater than twelve months is as follows:

As of December 31, 2017

		Less than 12 Months					12 Months or Longer					Total
(000's omitted)	#	Fair Value		Gross Unrealized Losses		#	Fair Value		Gross Unrealized Losses		#	Fair Value		Gross Unrealized Losses
Available-for-Sale Portfolio:
U.S. Treasury and agency securities	44	$	699,709	$	4,838	0	$	0	$	0	44	$	699,709	$	4,838
Obligations of state and political subdivisions	45		23,432		57	0		0		0	45		23,432		57
Government agency mortgage-backed securities	120		185,716		1,433	55		75,712		2,330	175		261,428		3,763
Corporate debt securities	1		2,623		25	0		0		0	1		2,623		25
Government agency collateralized mortgage obligations	39		80,041		878	1		1		0	40		80,042		878
Total available-for-sale investment portfolio	249	$	991,521	$	7,231	56	$	75,713	$	2,330	305	$	1,067,234	$	9,561

As of December 31, 2016

		Less than 12 Months					12 Months or Longer					Total
(000's omitted)	#	Fair Value		Gross Unrealized Losses		#	Fair Value		Gross Unrealized Losses		#	Fair Value		Gross Unrealized Losses
Available-for-Sale Portfolio:
U.S. Treasury and agency securities	13	$	449,242	$	2,118	0	$	0	$	0	13	$	449,242	$	2,118
Obligations of state and political subdivisions	197		102,106		1,054	0		0		0	197		102,106		1,054
Government agency mortgage-backed securities	57		83,862		1,637	15		21,788		830	72		105,650		2,467
Corporate debt securities	1		2,677		31	0		0		0	1		2,677		31
Government agency collateralized mortgage obligations	0		0		0	2		2		0	2		2		0
Total available-for-sale investment portfolio	268	$	637,887	$	4,840	17	$	21,790	$	830	285	$	659,677	$	5,670

75

The unrealized losses reported pertaining to securities issued by the U.S. government and its sponsored entities, include treasuries, agencies, and mortgage-backed securities issued by Ginnie Mae, Fannie Mae, and Freddie Mac which are currently rated AAA by Moody’s Investor Services, AA+ by Standard & Poor’s and are guaranteed by the U.S. government. The majority of the obligations of state and political subdivisions and corporations carry a credit rating of A or better.  Additionally, a majority of the obligations of state and political subdivisions carry a secondary level of credit enhancement. The Company does not intend to sell these securities, nor is it more likely than not that the Company will be required to sell these securities prior to recovery of the amortized cost. The unrealized losses in the portfolios are primarily attributable to changes in interest rates.  As such, management does not believe any individual unrealized loss as of December 31, 2017 represents OTTI.

The amortized cost and estimated fair value of debt securities at December 31, 2017, by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.  Securities not due at a single maturity date are shown separately.

	Available-for-Sale
(000's omitted)	Amortized Cost		Fair Value
Due in one year or less	$	45,966	$	46,042
Due after one through five years		1,565,423		1,572,634
Due after five years through ten years		758,742		769,828
Due after ten years		190,489		197,146
Subtotal		2,560,620		2,585,650
Government agency mortgage-backed securities		358,180		357,538
Government agency collateralized mortgage obligations		88,097		87,374
Total	$	3,006,897	$	3,030,562

Investment securities with a carrying value of $1.530 billion and $1.865 billion at December 31, 2017 and 2016, respectively, were pledged to collateralize certain deposits and borrowings.  As of December 31, 2017, securities pledged to collateralize certain deposits and borrowings included $473.2 million of U.S. Treasury securities that were pledged as collateral for securities sold under agreement to repurchase.  All securities sold under agreement to repurchase as of December 31, 2017 have an overnight and continuous maturity.

NOTE D: LOANS

The segments of the Company’s loan portfolio are disaggregated into the following classes that allow management to monitor risk and performance:

· Consumer mortgages consist primarily of fixed rate residential instruments, typically 10 – 30 years in contractual term, secured by first liens on real property.

· Business lending is comprised of general purpose commercial and industrial loans including, but not limited to agricultural-related and dealer floor plans, as well as mortgages on commercial property.

· Consumer indirect consists primarily of installment loans originated through selected dealerships and are secured by automobiles, marine and other recreational vehicles.

· Consumer direct consists of all other loans to consumers such as personal installment loans and lines of credit.

· Home equity products are consumer purpose installment loans or lines of credit most often secured by a first or second lien position on residential real estate with terms up to 30 years.

76

The balances of these classes at December 31 are summarized as follows:

(000's omitted)	2017			2016
Consumer mortgage	$	2,220,298		$	1,819,701
Business lending		2,424,223			1,490,076
Consumer indirect		1,011,978			1,044,972
Consumer direct		179,929			191,815
Home equity		420,329			401,998
Gross loans, including deferred origination costs		6,256,757			4,948,562
Allowance for loan losses		(47,583	)		(47,233	)
Loans, net of allowance for loan losses	$	6,209,174		$	4,901,329

The Company had approximately $25.3 million and $22.8 million of net deferred loan origination costs included in gross loans as of December 31, 2017 and 2016, respectively.

Certain directors and executive officers of the Company, as well as associates of such persons, are loan customers.  Loans to these individuals were made in the ordinary course of business under normal credit terms and do not have more than a normal risk of collection.  Following is a summary of the aggregate amount of such loans during 2017 and 2016.

(000's omitted)	2017			2016
Balance at beginning of year	$	10,950		$	11,337
New loans		16,617			4,959
Payments		(5,223	)		(5,346	)
Balance at end of year	$	22,344		$	10,950

Acquired loans

Acquired loans are recorded at fair value as of the date of purchase with no allowance for loan loss.  The outstanding principal balance and the related carrying amount of acquired loans included in the Consolidated Statement of Condition at December 31 are as follows:

(000's omitted)	2017		2016
Credit impaired acquired loans:
Outstanding principal balance	$	13,242	$	6,354
Carrying amount		10,115		5,553
Non-impaired acquired loans:
Outstanding principal balance		1,658,780		497,308
Carrying amount		1,626,979		489,807
Total acquired loans:
Outstanding principal balance		1,672,022		503,662
Carrying amount		1,637,094		495,360

The outstanding balance related to credit impaired acquired loans was $13.4 million and $6.6 million at December 31, 2017 and 2016, respectively.  The changes in the accretable discount related to the credit impaired acquired loans are as follows:

(000's omitted)	2017			2016
Balance at beginning of year	$	498		$	810
Merchants acquisition		793			0
Accretion recognized		(905	)		(455	)
Net reclassification to accretable from nonaccretable		590			143
Balance at end of year	$	976		$	498

77

Credit Quality

Management monitors the credit quality of its loan portfolio on an ongoing basis.  Measurement of delinquency and past due status are based on the contractual terms of each loan.  Past due loans are reviewed on a monthly basis to identify loans for non-accrual status.  The following is an aged analysis of the Company’s past due loans by class as of December 31, 2017:

Legacy Loans (excludes loans acquired after January 1, 2009)

(000’s omitted)	Past Due 30 - 89 days		90+ Days Past Due and Still Accruing		Nonaccrual		Total Past Due		Current		Total Loans
Consumer mortgage	$	13,564	$	1,500	$	10,722	$	25,786	$	1,728,823	$	1,754,609
Business lending		2,283		571		3,944		6,798		1,369,801		1,376,599
Consumer indirect		14,197		295		0		14,492		977,344		991,836
Consumer direct		1,875		48		0		1,923		172,556		174,479
Home equity		1,116		94		1,354		2,564		319,576		322,140
Total	$	33,035	$	2,508	$	16,020	$	51,563	$	4,568,100	$	4,619,663

Acquired Loans (includes loans acquired after January 1, 2009)

(000’s omitted)	Past Due 30 - 89 days		90+ Days Past Due and Still Accruing		Nonaccrual		Total Past Due		Acquired Impaired(1)		Current		Total Loans
Consumer mortgage	$	2,603	$	26	$	3,066	$	5,695	$	0	$	459,994	$	465,689
Business lending		4,661		0		4,328		8,989		10,115		1,028,520		1,047,624
Consumer indirect		245		8		0		253		0		19,889		20,142
Consumer direct		100		0		0		100		0		5,350		5,450
Home equity		634		170		1,326		2,130		0		96,059		98,189
Total	$	8,243	$	204	$	8,720	$	17,167	$	10,115	$	1,609,812	$	1,637,094

⁽¹⁾ Acquired impaired loans were not classified as nonperforming assets as the loans are considered to be performing under ASC 310-30.  As a result interest income, through the accretion of the difference between the carrying amount of the loans and the expected cashflows, is being recognized on all acquired impaired loans.

The following is an aged analysis of the Company’s past due loans by class as of December 31, 2016:

Legacy Loans (excludes loans acquired after January 1, 2009)

(000’s omitted)	Past Due 30 - 89 days		90+ Days Past Due and Still Accruing		Nonaccrual		Total Past Due		Current		Total Loans
Consumer mortgage	$	11,379	$	1,180	$	11,352	$	23,911	$	1,635,849	$	1,659,760
Business lending		3,921		145		3,811		7,877		1,269,789		1,277,666
Consumer indirect		13,883		166		0		14,049		1,000,776		1,014,825
Consumer direct		1,549		58		0		1,607		180,315		181,922
Home equity		1,250		414		1,437		3,101		315,928		319,029
Total	$	31,982	$	1,963	$	16,600	$	50,545	$	4,402,657	$	4,453,202

78

Acquired Loans (includes loans acquired after January 1, 2009)

(000’s omitted)	Past Due 30 - 89 days		90+ Days Past Due and Still Accruing		Nonaccrual		Total Past Due		Acquired Impaired(1)		Current		Total Loans
Consumer mortgage	$	1,539	$	205	$	2,332	$	4,076	$	0	$	155,865	$	159,941
Business lending		528		0		1,252		1,780		5,553		205,077		212,410
Consumer indirect		231		3		0		234		0		29,913		30,147
Consumer direct		231		0		0		231		0		9,662		9,893
Home equity		778		905		435		2,118		0		80,851		82,969
Total	$	3,307	$	1,113	$	4,019	$	8,439	$	5,553	$	481,368	$	495,360

⁽¹⁾ Acquired impaired loans were not classified as nonperforming assets as the loans are considered to be performing under ASC 310-30.  As a result interest income, through the accretion of the difference between the carrying amount of the loans and the expected cashflows, is being recognized on all acquired impaired loans.

The Company uses several credit quality indicators to assess credit risk in an ongoing manner.  The Company’s primary credit quality indicator for its business lending portfolio is an internal credit risk rating system that categorizes loans as “pass”, “special mention”, “classified”, or “doubtful”.  Credit risk ratings are applied individually to those classes of loans that have significant or unique credit characteristics that benefit from a case-by-case evaluation.  In general, the following are the definitions of the Company’s credit quality indicators:

Pass	The condition of the borrower and the performance of the loans are satisfactory or better.
Special Mention	The condition of the borrower has deteriorated although the loan performs as agreed.
Classified	The condition of the borrower has significantly deteriorated and the performance of the loan could further deteriorate if deficiencies are not corrected.
Doubtful	The condition of the borrower has deteriorated to the point that collection of the balance is improbable based on current facts and conditions.

The following table shows the amount of business lending loans by credit quality category:

	December 31, 2017						December 31, 2016
(000’s omitted)	Legacy		Acquired		Total		Legacy		Acquired		Total
Pass	$	1,170,156	$	963,981	$	2,134,137	$	1,051,005	$	162,165	$	1,213,170
Special mention		129,076		37,321		166,397		135,602		29,690		165,292
Classified		77,367		34,628		111,995		90,585		15,002		105,587
Doubtful		0		1,579		1,579		474		0		474
Acquired impaired		0		10,115		10,115		0		5,553		5,553
Total	$	1,376,599	$	1,047,624	$	2,424,223	$	1,277,666	$	212,410	$	1,490,076

All other loans are underwritten and structured using standardized criteria and characteristics, primarily payment performance, and are normally risk rated and monitored collectively on a monthly basis.  These are typically loans to individuals in the consumer categories and are delineated as either performing or nonperforming.  Performing loans include current, 30 – 89 days past due and acquired impaired loans.  Nonperforming loans include 90+ days past due and still accruing and nonaccrual loans.  The following tables detail the balances in all loan categories except for business lending at December 31, 2017:

Legacy loans (excludes loans acquired after January 1, 2009)

(000’s omitted)	Consumer Mortgage		Consumer Indirect		Consumer Direct		Home Equity		Total
Performing	$	1,742,387	$	991,541	$	174,431	$	320,692	$	3,229,051
Nonperforming		12,222		295		48		1,448		14,013
Total	$	1,754,609	$	991,836	$	174,479	$	322,140	$	3,243,064

79

Acquired loans (includes loans acquired after January 1, 2009)

(000’s omitted)	Consumer Mortgage		Consumer Indirect		Consumer Direct		Home Equity		Total
Performing	$	462,597	$	20,134	$	5,450	$	96,693	$	584,874
Nonperforming		3,092		8		0		1,496		4,596
Total	$	465,689	$	20,142	$	5,450	$	98,189	$	589,470

The following table details the balances in all other loan categories at December 31, 2016:

Legacy loans (excludes loans acquired after January 1, 2009)

(000’s omitted)	Consumer Mortgage		Consumer Indirect		Consumer Direct		Home Equity		Total
Performing	$	1,647,228	$	1,014,659	$	181,864	$	317,178	$	3,160,929
Nonperforming		12,532		166		58		1,851		14,607
Total	$	1,659,760	$	1,014,825	$	181,922	$	319,029	$	3,175,536

Acquired loans (includes loans acquired after January 1, 2009)

(000’s omitted)	Consumer Mortgage		Consumer Indirect		Consumer Direct		Home Equity		Total
Performing	$	157,404	$	30,144	$	9,893	$	81,629	$	279,070
Nonperforming		2,537		3		0		1,340		3,880
Total	$	159,941	$	30,147	$	9,893	$	82,969	$	282,950

All loan classes are collectively evaluated for impairment except business lending, as described in Note A.  A summary of individually evaluated impaired loans as of December 31, 2017 and 2016 is as follows:

(000’s omitted)	2017		2016
Loans with allowance allocation	$	5,125	$	1,109
Loans without allowance allocation		884		556
Carrying balance		6,009		1,665
Contractual balance		9,165		3,340
Specifically allocated allowance		804		477
Average impaired loans		9,517		4,683
Interest income recognized		0		0

In the course of working with borrowers, the Company may choose to restructure the contractual terms of certain loans.  In this scenario, the Company attempts to work-out an alternative payment schedule with the borrower in order to optimize collectability of the loan.  Any loans that are modified are reviewed by the Company to identify if a troubled debt restructuring (“TDR”) has occurred, which is when, for economic or legal reasons related to a borrower’s financial difficulties, the Company grants a concession to the borrower that it would not otherwise consider.  Terms may be modified to fit the ability of the borrower to repay in line with its current financial standing and the restructuring of the loan may include the transfer of assets from the borrower to satisfy the debt, a modification of loan terms, or a combination of the two.  With regard to determination of the amount of the allowance for loan losses, troubled debt restructured loans are considered to be impaired.  As a result, the determination of the amount of allowance for loan losses related to impaired loans for each portfolio segment within TDRs is the same as detailed previously.

In accordance with clarified guidance issued by the OCC, loans that have been discharged in Chapter 7 bankruptcy but not reaffirmed by the borrower, are classified as TDRs, irrespective of payment history or delinquency status, even if the repayment terms for the loan have not been otherwise modified.  The Company’s lien position against the underlying collateral remains unchanged.  Pursuant to that guidance, the Company records a charge-off equal to any portion of the carrying value that exceeds the net realizable value of the collateral.  The amount of loss incurred in 2017, 2016 and 2015 was immaterial.

TDRs less than $0.5 million are collectively included in the general loan loss allocation and the qualitative review, if necessary.  Commercial loans greater than $0.5 million are individually evaluated for impairment, and if necessary, a specific allocation of the allowance for loan losses is provided.

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Information regarding TDRs as of December 31, 2017 and December 31, 2016 is as follows

	December 31, 2017												December 31, 2016
(000’s omitted)	Nonaccrual				Accruing				Total				Nonaccrual				Accruing				Total
		#	Amount			#	Amount			#	Amount			#	Amount			#	Amount			#	Amount
Consumer mortgage		51	$	2,265		44	$	1,750		95	$	4,015		36	$	1,520		45	$	1,956		81	$	3,476
Business lending		8		218		7		501		15		719		6		91		5		690		11		781
Consumer indirect		0		0		71		883		71		883		0		0		78		771		78		771
Consumer direct		0		0		25		69		25		69		0		0		23		65		23		65
Home equity		13		245		7		204		20		449		14		221		7		216		21		437
Total		72	$	2,728		154	$	3,407		226	$	6,135		56	$	1,832		158	$	3,698		214	$	5,530

The following table presents information related to loans modified in a TDR during the years ended December 31, 2017 and 2016.  Of the loans noted in the table below, all loans for the years ended December 31, 2017 and December 31, 2016, were modified due to a Chapter 7 bankruptcy as described previously.  The financial effects of these restructurings were immaterial.

	December 31, 2017				December 31, 2016
(000’s omitted)		#	Amount			#	Amount
Consumer mortgage		23	$	1,254		9	$	597
Business lending		8		412		0		0
Consumer indirect		33		490		33		459
Consumer direct		6		17		3		51
Home equity		4		95		3		50
Total		74	$	2,268		48	$	1,157

Allowance for Loan Losses

The allowance for loan losses is general in nature and is available to absorb losses from any loan type despite the analysis below.  The following presents by class the activity in the allowance for loan losses:

(000’s omitted)	Consumer Mortgage			Business Lending			Consumer Indirect			Consumer Direct			Home Equity			Unallocated			Acquired Impaired			Total
Balance at December 31, 2014	$	10,286		$	15,787		$	11,544		$	3,083		$	2,701		$	1,767		$	173		$	45,341
Charge-offs		(1,374	)		(2,146	)		(6,714	)		(1,490	)		(244	)		0			(103	)		(12,071	)
Recoveries		80			877			3,943			722			62			0			0			5,684
Provision		1,206			1,231			3,649			682			147			(566	)		98			6,447
Balance at December 31, 2015		10,198			15,749			12,422			2,997			2,666			1,201			168			45,401
Charge-offs		(647	)		(1,872	)		(7,643	)		(1,706	)		(218	)		0			(97	)		(12,183	)
Recoveries		115			616			4,168			901			139			0			0			5,939
Provision		428			2,727			4,835			787			(188	)		(550	)		37			8,076
Balance at December 31, 2016		10,094			17,220			13,782			2,979			2,399			651			108			47,233
Charge-offs		(707	)		(4,959	)		(8,456	)		(2,081	)		(284	)		0			(270	)		(16,757	)
Recoveries		50			656			4,516			849			52			0			0			6,123
Provision		1,028			4,340			3,626			1,292			(60	)		449			309			10,984
Balance at December 31, 2017	$	10,465		$	17,257		$	13,468		$	3,039		$	2,107		$	1,100		$	147		$	47,583

81

NOTE E: PREMISES AND EQUIPMENT

Premises and equipment consist of the following at December 31:

(000's omitted)	2017			2016
Land and land improvements	$	23,869		$	22,585
Bank premises		131,647			116,663
Equipment and construction in progress		86,059			80,527
Premises and equipment, gross		241,575			219,775
Accumulated depreciation		(118,182	)		(107,457	)
Premises and equipment, net	$	123,393		$	112,318

NOTE F: GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS

The gross carrying amount and accumulated amortization for each type of identifiable intangible asset are as follows:

	December 31, 2017							December 31, 2016
(000's omitted)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Amortizing intangible assets:
Core deposit intangibles	$	62,902	$	(37,877	)	$	25,025	$	39,688	$	(32,581	)	$	7,107
Other intangibles		86,535		(20,902	)		65,633		17,853		(9,258	)		8,595
Total amortizing intangibles	$	149,437	$	(58,779	)	$	90,658	$	57,541	$	(41,839	)	$	15,702

The estimated aggregate amortization expense for each of the five succeeding fiscal years ended December 31 is as follows:

2018	$	17,872
2019		15,033
2020		12,497
2021		10,665
2022		9,165
Thereafter		25,426
Total	$	90,658

Shown below are the components of the Company’s goodwill at December 31, 2017 and 2016:

(000’s omitted)	Year Ended December 31, 2015			Activity		Year Ended December 31, 2016			Activity		Year Ended December 31, 2017
Goodwill	$	468,076		$	1,890	$	469,966		$	269,288	$	739,254
Accumulated impairment		(4,824	)		0		(4,824	)		0		(4,824	)
Goodwill, net	$	463,252		$	1,890	$	465,142		$	269,288	$	734,430

During the first quarter of 2017, the Company performed its annual internal valuation of goodwill and impairment analysis by comparing the fair value of each reporting unit to its carrying value.  Results of the valuations indicate there was no goodwill impairment.

Mortgage Servicing Rights

Under certain circumstances, the Company sells consumer residential mortgage loans in the secondary market and typically retains the right to service the loans sold.  Generally, the Company’s residential mortgage loans sold to third parties are sold on a non-recourse basis.  Upon sale, a mortgage servicing right (“MSR”) is established, which represents the current fair value of future net cash flows expected to be realized for performing the servicing activities.  The Company stratifies these assets based on predominant risk characteristics, namely expected term of the underlying financial instruments, and uses a valuation model that calculates the present value of future cash flows to determine the fair value of servicing rights. MSRs are recorded in other assets at the lower of the initial capitalized amount, net of accumulated amortization or fair value.  Mortgage loans serviced for others are not included in the accompanying consolidated statements of condition.

82

The following table summarizes the changes in carrying value of MSRs and the associated valuation allowance:

(000’s omitted)	2017			2016
Carrying value before valuation allowance at beginning of period	$	1,435		$	1,472
Additions		358			481
Merchants acquisition		64			0
Amortization		(499	)		(518	)
Carrying value before valuation allowance at end of period		1,358			1,435
Valuation allowance balance at beginning of period		0			0
Impairment charges		0			(226	)
Impairment recoveries		0			226
Valuation allowance balance at end of period		0			0
Net carrying value at end of period	$	1,358		$	1,435
Fair value of MSRs at end of period	$	2,473		$	1,928
Principal balance of loans sold during the year	$	32,937		$	45,852
Principal balance of loans serviced for others	$	358,518		$	365,374
Custodial escrow balances maintained in connection with loans serviced for others	$	5,363		$	5,603

The following table summarizes the key economic assumptions used to estimate the value of the MSRs at December 31:

	2017			2016
Weighted-average contractual life (in years)		21.3			20.8
Weighted-average constant prepayment rate (CPR)		11.1	%		15.1	%
Weighted-average discount rate		3.3	%		3.5	%

NOTE G: DEPOSITS

Deposits consist of the following at December 31:

(000's omitted)	2017		2016
Noninterest checking	$	2,293,057	$	1,646,039
Interest checking		1,830,914		1,644,029
Savings		1,421,512		1,303,851
Money market		2,124,633		1,778,907
Time		774,304		703,128
Total deposits	$	8,444,420	$	7,075,954

The approximate maturities of time deposits at December 31, 2017 are as follows:

(000's omitted)	All Accounts		Accounts $250,000 or Greater
2018	$	545,389	$	51,875
2019		100,833		5,958
2020		59,849		7,445
2021		34,582		1,807
2022		33,400		601
Thereafter		251		0
Total	$	774,304	$	67,686

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NOTE H: BORROWINGS

Outstanding borrowings at December 31 are as follows:

(000's omitted)	2017		2016
FHLB overnight advance	$	24,000	$	146,200
Subordinated debt held by unconsolidated subsidiary trusts,
net of discount of $332 and $357, respectively		122,814		102,170
Securities sold under agreement to repurchase, short term		337,011		0
FHLB Long term advances		2,071		0
Total borrowings	$	485,896	$	248,370

FHLB advances are collateralized by a blanket lien on the Company's residential real estate loan portfolio and various investment securities.

Borrowings at December 31, 2017 have contractual maturity dates as follows:

(000's omitted, except rate)	Carrying Value		Weighted-average Rate at December 31, 2017
January 2, 2018	$	361,011		0.54	%
July 3, 2023		601		2.25	%
October 23, 2023		515		1.50	%
October 1, 2025		329		1.50	%
March 1, 2029		626		2.50	%
July 31, 2031		24,875		4.96	%
December 15, 2034		20,619		3.54	%
December 15, 2036		77,320		3.24	%
Total	$	485,896		1.34	%

The weighted-average interest rate on borrowings for the years ended December 31, 2017 and 2016 was 1.51% and 1.46%, respectively.

The Company sponsors three business trusts, Community Statutory Trust III (“CST III”), Community Capital Trust IV (“CCT IV”) and MBVT Statutory Trust I (“MBVT I”), of which 100% of the common stock is owned by the Company.  The common stock of MBVT Statutory Trust I was acquired in the Merchants acquisition.  The trusts were formed for the purpose of issuing company-obligated mandatorily redeemable preferred securities to third-party investors and investing the proceeds from the sale of such preferred securities solely in junior subordinated debt securities of the Company.  The debentures held by each trust are the sole assets of such trust.  Distributions on the preferred securities issued by each trust are payable quarterly at a rate per annum equal to the interest rate being earned by the trust on the debentures held by that trust and are recorded as interest expense in the consolidated financial statements.  The preferred securities are subject to mandatory redemption, in whole or in part, upon repayment of the debentures.  The Company has entered into agreements which, taken collectively, fully and unconditionally guarantee the preferred securities subject to the terms of each of the guarantees.  The terms of the preferred securities of each trust are as follows:

Trust	Issuance Date	Par Amount	Interest Rate	Maturity Date	Call Price
CST III	7/31/2001	$24.5 million	3 month LIBOR plus 3.58% (4.96%)	7/31/2031	Par
CCT IV	12/8/2006	$75.0 million	3 month LIBOR plus 1.65% (3.24%)	12/15/2036	Par
MBVT I	12/15/2004	$20.6 million	3 month LIBOR plus 1.95% (3.54%)	12/15/2034	Par

84

NOTE I: INCOME TAXES

The provision for income taxes for the years ended December 31 is as follows:

(000's omitted)	2017			2016		2015
Current:
Federal	$	31,152		$	32,829	$	27,663
State and other		6,788			4,890		2,608
Deferred:
Federal		(28,146	)		11,444		9,604
State and other		(546	)		1,622		1,112
Provision for income taxes	$	9,248		$	50,785	$	40,987

Components of the net deferred tax liability, included in other liabilities, as of December 31 are as follows:

(000's omitted)	2017			2016
Allowance for loan losses	$	11,675		$	18,366
Employee benefits		4,216			6,311
Debt extinguishment		0			299
Other, net		0			5,202
Deferred tax asset		15,891			30,178
Investment securities		22,690			32,839
Tax-deductible goodwill		39,154			43,504
Loan origination costs		6,109			8,228
Depreciation		2,372			71
Mortgage servicing rights		330			548
Pension		13,228			18,194
Other, net		542			0
Deferred tax liability		84,425			103,384
Net deferred tax liability	$	(68,534	)	$	(73,206	)

The Company has determined that no valuation allowance is necessary as it is more likely than not that the gross deferred tax assets will be realized through carryback of future deductions to taxable income in prior years, future reversals of existing temporary differences, and through future taxable income.

A reconciliation of the differences between the federal statutory income tax rate and the effective tax rate for the years ended December 31 is shown in the following table:

	2017			2016			2015
Federal statutory income tax rate		35.0	%		35.0	%		35.0	%
Increase (reduction) in taxes resulting from:
Tax-exempt interest		(3.8	)		(4.0	)		(5.0	)
State income taxes, net of federal benefit		2.5			2.7			1.8
Stock-based compensation		(2.0	)		0			0
Federal deferred tax revaluation adjustment		(23.7	)		0			0
Other, net		(2.2	)		(0.9	)		(0.8	)
Effective income tax rate		5.8	%		32.8	%		31.0	%

A reconciliation of the unrecognized tax benefits for the years ended December 31 is shown in the following table:

(000’s omitted)	2017			2016			2015
Unrecognized tax benefits at beginning of year	$	92		$	127		$	162
Changes related to:
Lapse of statutes of limitations		(68	)		(35	)		(35	)
Unrecognized tax benefits at end of year	$	24		$	92		$	127

85

As of December 31, 2017, the total amount of unrecognized tax benefits that would impact the Company’s effective tax rate if recognized is $0.02 million.  It is reasonably possible that the amount of unrecognized tax benefits could change in the next twelve months as a result of various examinations and expiration of statutes of limitations on prior tax returns.

The Company’s policy is to recognize interest and penalties related to unrecognized tax benefits as part of income taxes in the consolidated statement of income.  The accrued interest related to tax positions was immaterial.

The Company’s federal and state income tax returns are routinely subject to examination from various governmental taxing authorities.  Such examinations may result in challenges to the tax return treatment applied by the Company to specific transactions.  Management believes that the assumptions and judgment used to record tax-related assets or liabilities have been appropriate.  Future examinations by taxing authorities of the Company’s federal or state tax returns could have a material impact on the Company’s results of operations.  The Company’s federal income tax returns for years after 2013 may still be examined by the Internal Revenue Service.  New York State income tax returns for years after 2012 may still be examined by the New York Department of Taxation and Finance.  It is not possible to estimate, if and when those examinations may be completed.

On December 22, 2017, H.R.1, referred to as the “Tax Cuts and Jobs Act,” was signed into law.  Among other things, the Tax Cuts and Jobs Act permanently lowers the corporate tax rate to 21% from the existing maximum rate of 35%, effective for tax years including or commencing January 1, 2018.  ASC 740, Income Taxes, requires existing deferred tax assets and liabilities to be measured at the enacted tax rate expected to be applied when the temporary differences are to be realized or settled. Thus, as of the date of enactment, deferred taxes were re-measured based upon the new 21% tax rate.  Prior to the change in tax rate, the Company had recorded net deferred tax liabilities based on a marginal tax rate of 37.70%.  The change in tax rate resulted in a decrease in the marginal tax rate to 24.29% and a deferred tax benefit of $38.0 million from the write-down of the net deferred tax liabilities. The effect of this change in tax law was recorded as a component of the income tax provision including those deferred assets and liabilities that were established through a financial statement component other than continuing operations.

On December 22, 2017, the SEC staff issued Staff Accounting Bulletin No. 118 (“SAB 118”), which provided guidance on reporting accounting impacts of the recently enacted tax reform legislation.  In SAB 118, it is noted that reporting companies may be unable to complete the accounting for certain income tax effects of the Tax Cuts and Jobs Act by the time financial statements are issued for the reporting period in which the Tax Cuts and Jobs Act was enacted (the “Enactment Period”). SAB 118 provides guidance for the scenarios in which a company does not have the necessary information available, prepared or analyzed to complete the accounting for certain income tax effects when it issues financial statements covering the Enactment Period.  In those cases, SAB 118 would permit the company to provide “reasonable estimates” for the income tax effects of the Tax Cuts and Jobs Act and to report those effects as “provisional amounts” in its financial statements during a limited “measurement period.”

Based on the review of its deferred tax assets and liabilities, the Company notes that the accounting for the enactment of the Tax Cuts and Jobs Act is complete and the effects have been appropriately reflected in the consolidated statement of condition as of December 31, 2017 and the consolidated statement of income for the year ended December 31, 2017.

NOTE J: LIMITS ON DIVIDENDS AND OTHER REVENUE SOURCES

The Company’s ability to pay dividends to its shareholders is largely dependent on the Bank’s ability to pay dividends to the Company.  In addition to the capital requirements discussed below, the circumstances under which the Bank may pay dividends are limited by federal statutes, regulations, and policies.  For example, as a national bank, the Bank must obtain the approval of the Office of the Comptroller of the Currency (“OCC”) for payments of dividends if the total of all dividends declared in any calendar year would exceed the total of the Bank’s net profits, as defined by applicable regulations, for that year, combined with its retained net profits for the preceding two years.  Furthermore, the Bank may not pay a dividend in an amount greater than its undivided profits then on hand after deducting its losses and bad debts, as defined by applicable regulations.  At December 31, 2017, the Bank had approximately $69.0 million in undivided profits legally available for the payment of dividends.

In addition, the Board of Governors of the Federal Reserve System (“FRB”) and the OCC are authorized to determine under certain circumstances that the payment of dividends would be an unsafe or unsound practice and to prohibit payment of such dividends.  The FRB has indicated that banking organizations should generally pay dividends only out of current operating earnings.

There are also statutory limits on the transfer of funds to the Company by its banking subsidiary, whether in the form of loans or other extensions of credit, investments or assets purchases.  Such transfer by the Bank to the Company generally is limited in amount to 10% of the Bank’s capital and surplus, or 20% in the aggregate.  Furthermore, such loans and extensions of credit are required to be collateralized in specific amounts.

86

NOTE K: BENEFIT PLANS

Pension and post-retirement plans

The Company provides a qualified defined benefit pension to eligible employees and retirees, other post-retirement health and life insurance benefits to certain retirees, an unfunded supplemental pension plan for certain key executives, and an unfunded stock balance plan for certain of its nonemployee directors.  Using a measurement date of December 31, the following table shows the funded status of the Company's plans reconciled with amounts reported in the Company's consolidated statements of condition:

	Pension Benefits						Post-retirement Benefits
(000's omitted)	2017			2016			2017			2016
Change in benefit obligation:
Benefit obligation at the beginning of year	$	127,084		$	127,134		$	1,806		$	1,918
Service cost		4,181			4,106			0			0
Interest cost		5,717			5,624			76			82
Plan amendment / acquisition		11,646			22			0			0
Participant contributions		0			0			467			516
Deferred actuarial loss/(gain)		8,978			(1,628	)		245			174
Benefits paid		(10,156	)		(8,174	)		(809	)		(884	)
Benefit obligation at end of year		147,450			127,084			1,785			1,806
Change in plan assets:
Fair value of plan assets at beginning of year		180,400			172,026			0			0
Actual return of plan assets		22,954			14,402			0			0
Participant contributions		0			0			467			516
Employer contributions		9,839			2,146			342			368
Plan acquisition		14,070			0			0			0
Benefits paid		(10,156	)		(8,174	)		(809	)		(884	)
Fair value of plan assets at end of year		217,107			180,400			0			0
Over/(Under) funded status at year end	$	69,657		$	53,316		$	(1,785	)	$	(1,806	)
Amounts recognized in the consolidated statement of condition were:
Other assets	$	81,000		$	64,709		$	0		$	0
Other liabilities		(11,343	)		(11,393	)		(1,785	)		(1,806	)
Amounts recognized in accumulated other comprehensive income (loss) (“AOCI”) were:
Net loss	$	26,935		$	28,323		$	420		$	183
Net prior service cost (credit)		2,944			2,264			(1,622	)		(1,801	)
Pre-tax AOCI		29,879			30,587			(1,202	)		(1,618	)
Taxes		(7,340	)		(11,622	)		296			614
AOCI at year end	$	22,539		$	18,965		$	(906	)	$	(1,004	)

The benefit obligation for the defined benefit pension plan was $136.1 million and $115.7 million as of December 31, 2017 and 2016, respectively, and the fair value of plan assets as of December 31, 2017 and 2016 was $217.1 million and $180.4 million, respectively.  Effective May 12, 2017, the Merchants Bank Pension Plan was merged into the Community Bank System, Inc. Pension Plan and the combined plan was revalued resulting in an additional unamortized actuarial gain of approximately $1.9 million, due primarily to a gain on plan assets that was partially offset by a decrease in the discount rate from 4.50% to 4.40% as of the valuation date.

The Company has unfunded supplemental pension plans for certain key active and retired executives.  The projected benefit obligation for the unfunded supplemental pension plan for certain key executives was $11.3 million for 2017 and 2016.  The Company also has an unfunded stock balance plan for certain of its nonemployee directors.  The projected benefit obligation for the unfunded stock balance plan was $0.1 million for 2017 and 2016.  The plan was frozen effective December 31, 2009.

Effective December 31, 2009, the Company terminated its post-retirement medical program for current and future employees.  Remaining plan participants will include only existing retirees as of December 31, 2010.  This change was accounted for as a negative plan amendment and a $3.5 million, net of income taxes, benefit for prior service was recognized in AOCI in 2009.  This negative plan amendment is being amortized over the expected benefit utilization period of remaining plan participants.

87

Amounts recognized in accumulated other comprehensive income, net of tax, for the year ended December 31, are as follows:

	Pension Benefits						Post-retirement Benefits
(000's omitted)	2017			2016			2017		2016
Prior service cost/(credit)	$	424		$	(26	)	$	111	$	110
Net (gain) loss		(851	)		(3,517	)		148		111
Total	$	(427	)	$	(3,543	)	$	259	$	221

The estimated costs, net of tax, that will be amortized from accumulated other comprehensive (income) loss into net periodic (income) cost over the next fiscal year are as follows:

(000's omitted)	Pension Benefits			Post-retirement Benefits
Prior service credit	$	(330	)	$	(179	)
Net loss		1,054			18
Total	$	724		$	(161	)

The weighted-average assumptions used to determine the benefit obligations as of December 31 are as follows:

	Pension Benefits						Post-retirement Benefits
	2017			2016			2017			2016
Discount rate		4.00	%		4.50	%		4.00	%		4.40	%
Expected return on plan assets		7.00	%		7.00	%		N/A			N/A
Rate of compensation increase		3.50	%		3.50	%		N/A			N/A

The net periodic benefit cost as of December 31 is as follows:

	Pension Benefits									Post-retirement Benefits
(000's omitted)	2017			2016			2015			2017			2016			2015
Service cost	$	4,181		$	4,106		$	3,324		$	0		$	0		$	0
Interest cost		5,717			5,624			5,506			76			82			87
Expected return on plan assets		(13,354	)		(11,842	)		(12,169	)		0			0			0
Plan amendment		0			20			0			0			0			0
Amortization of unrecognized net loss/(gain)		767			1,508			1,466			8			(5	)		(13	)
Amortization of prior service cost		55			43			8			(179	)		(179	)		(179	)
Net periodic (benefit)	$	(2,634	)	$	(541	)	$	(1,865	)	$	(95	)	$	(102	)	$	(105	)

Prior service costs in which all or almost all of the plan’s participants are fully eligible for benefits under the plan are amortized on a straight-line basis over the expected future working years of all active plan participants.  Unrecognized gains or losses are amortized using the “corridor approach”, which is the minimum amortization required. Under the corridor approach, the net gain or loss in excess of 10 percent of the greater of the projected benefit obligation or the market-related value of the assets is amortized on a straight-line basis over the expected future working years of all active plan participants.

The weighted-average assumptions used to determine the net periodic pension cost for the years ended December 31 are as follows:

	Pension Benefits									Post-retirement Benefits
	2017			2016			2015			2017			2016			2015
Discount rate		4.40	%		4.70	%		4.50	%		4.40	%		4.70	%		4.50	%
Expected return on plan assets		7.00	%		7.00	%		7.00	%		N/A			N/A			N/A
Rate of compensation increase		3.50	%		3.50	%		3.50	%		N/A			N/A			N/A

88

The amount of benefit payments that are expected to be paid over the next ten years are as follows:

(000's omitted)	Pension Benefits		Post-retirement Benefits
2018	$	8,702	$	145
2019		9,163		142
2020		9,404		139
2021		9,943		136
2022		10,378		133
2023-2027		56,064		618

The payments reflect future service and are based on various assumptions including retirement age and form of payment (lump-sum versus annuity). Actual results may differ from these estimates.

The assumed discount rate is used to reflect the time value of future benefit obligations.  The discount rate was determined based upon the yield on high-quality fixed income investments expected to be available during the period to maturity of the pension benefits.  This rate is sensitive to changes in interest rates.  A decrease in the discount rate would increase the Company’s obligation and future expense while an increase would have the opposite effect.   The expected long-term rate of return was estimated by taking into consideration asset allocation, reviewing historical returns on the type of assets held and current economic factors.  Based on the Company’s anticipation of future experience under the defined benefit pension plan, the mortality tables used to determine future benefit obligations under the plan were updated as of December 31, 2017 to the RP-2014 Mortality Table for annuitants and non-annuitants, adjusted backward to 2006 with Scale MP-2014, and then adjusted for mortality improvements with the Scale MP-2016 mortality improvement scale on a fully generational basis.  The appropriateness of the assumptions is reviewed annually.

Plan Assets

The investment objective for the defined benefit pension plan is to achieve an average annual total return over a five-year period equal to the assumed rate of return used in the actuarial calculations.  At a minimum performance level, the portfolio should earn the return obtainable on high quality intermediate-term bonds.  The Company’s perspective regarding portfolio assets combines both preservation of capital and moderate risk-taking.   Asset allocation favors equities, with a target allocation of approximately 60% equity securities and 40% fixed income securities and money market funds.  Due to the volatility in the market, the target allocation is not always desirable and asset allocations will fluctuate between acceptable ranges.  Prohibited transactions include purchase of securities on margin, uncovered call options, and short sale transactions.

The fair values of the Company’s defined benefit pension plan assets at December 31, 2017 by asset category are as follows:

Asset category (000’s omitted)	Quoted Prices in Active Markets for Identical Assets Level 1		Significant Observable Inputs Level 2		Significant Unobservable Inputs Level 3		Total
Money Market Accounts	$	0	$	10,381	$	0	$	10,381
Equity securities:
U.S. large-cap		53,154		0		0		53,154
U.S mid/small cap		26,309		0		0		26,309
CBU stock		8,344		0		0		8,344
International		47,723		0		0		47,723
		135,530		0		0		135,530
Fixed income securities:
Government securities		13,929		9,686		0		23,615
Investment grade bonds		19,278		0		0		19,278
High yield(a)		16,297		0		0		16,297
		49,504		9,686		0		59,190
Other investments (b)		11,302		73		0		11,375
Total (c)	$	196,336	$	20,140	$	0	$	216,476

89

The fair values of the Company’s defined benefit pension plan assets at December 31, 2016 by asset category are as follows:

Asset category (000’s omitted)	Quoted Prices in Active Markets for Identical Assets Level 1		Significant Observable Inputs Level 2		Significant Unobservable Inputs Level 3		Total
Money Market Accounts	$	103	$	8,048	$	0	$	8,151
Equity securities:
U.S. large-cap		43,235		0		0		43,235
U.S mid/small cap		19,032		0		0		19,032
CBU stock		7,417		0		0		7,417
International		27,064		0		0		27,064
		96,748		0		0		96,748
Fixed income securities:
Government securities		25,375		5,863		0		31,238
Investment grade bonds		15,253		0		0		15,253
High yield(a)		16,615		0		0		16,615
		57,243		5,863		0		63,106
Other investments (b)		12,023		58		0		12,081
Total (c)	$	166,117	$	13,969	$	0	$	180,086

(a)	This category is exchange-traded funds representing a diversified index of high yield corporate bonds.
(b)	This category is comprised of exchange-traded funds and mutual funds holding non-traditional investment classes including private equity funds and alternative exchange funds.
(c)	Excludes dividends and interest receivable totaling $0.6 million and $0.3 million at December 31, 2017 and 2016, respectively.

The valuation techniques used to measure fair value for the items in the table above are as follows:

· Money market funds - Managed portfolios, including commercial paper and other fixed income securities issued by U.S. and foreign corporations, asset-backed commercial paper, U.S. government securities, obligations of foreign governments and U.S. and foreign banks, which are valued at the closing price reported on the market on which the underlying securities are traded.

· Equity securities and other investments – Mutual funds, equity securities and common stock of the Company which are valued at the quoted market price of shares held at year-end.

· Fixed income securities - U.S. Treasuries, municipal bonds and notes, government sponsored entities, and corporate debt valued at the closing price reported on the active market on which the individual securities are traded or for municipal bonds and notes based on quoted prices for similar assets in the active market.

The Company makes contributions to its funded qualified pension plan as required by government regulation or as deemed appropriate by management after considering the fair value of plan assets, expected return on such assets, and the value of the accumulated benefit obligation.  The Company made a $2.0 million contribution to the Merchants Bank Pension Plan in 2017.  The Company made a $7.2 million contribution to its defined benefit pension plan in 2017.  The Company funds the payment of benefit obligations for the supplemental pension and post-retirement plans because such plans do not hold assets for investment.

Tupper Lake National Bank (“TLNB”), acquired in 2007, participated in the Pentegra Defined Benefit Plan for Financial Institutions (“Pentegra DB Plan”), a multi-employer tax qualified defined benefit pension plan.  The identification number and plan number of the Pentegra DB Plan are 13-5645888 and 333, respectively.  All employees of TLNB who met minimum service requirements participated in the plan.  As of June 30, 2016, the Pentegra DB Plan had total assets of $3.3 billion, actuarial present value of accumulated benefits of $4.8 billion and was at least 80 percent funded.  The assets of the multi-employer plan may be used to satisfy obligations of any of the employers participating in the plan.  As a result, contributions made by the Company may be used to provide benefits to participants of other participating employers.  Contributions for 2017, 2016 and 2015 were approximately $0.1 million, $0.05 million, and $0.03 million, respectively. Contributions made by the Company to the Pentegra DB Plan do not represent more than 5% of contributions made to the Pentegra DB Plan.

90

The assumed health care cost trend rate used in the post-retirement health plan at December 31, 2017 was 7.25% for the pre-65 participants and 5.00% for the post-65 participants for medical costs and 10.5% for prescription drugs.  The rate to which the cost trend rate is assumed to decline (the ultimate trend rate) and the year that the rate reaches the ultimate trend rate is 3.89% and 2075, respectively.

Assumed health care cost trend rates impact the amounts reported for the health care plan.  A one-percentage-point increase or decrease in the trend rate would increase the service and interest cost components by nominal amounts.

401(k) Employee Stock Ownership Plan

The Company has a 401(k) Employee Stock Ownership Plan in which employees can contribute from 1% to 90% of eligible compensation, with the first 3% being eligible for a 100% matching contribution in the form of Company common stock and the next 3% being eligible for a 50% matching contributions in the form of Company common stock.  The expense recognized under this plan for the years ended December 31, 2017, 2016 and 2015 was $5.3 million, $4.3 million, and $3.6 million, respectively.  Effective January 1, 2010, the defined benefit pension plan was modified to a new plan design that includes an interest credit contribution to be made to the 401(k) plan.  The expense recognized for this interest credit contribution for the years ended December 31, 2017, 2016, and 2015 was $0.8 million, $0.7 million, and $1.1 million, respectively.

The Company acquired The Merchants Bank 401(k) ESOP Plan with the Merchants acquisition and The Gordon B. Roberts 401(k) Plan with the GBR acquisition.  Effective January 1, 2018, The Merchants Bank 401(k) ESOP Plan and The Gordon B. Roberts 401(k) Plan were merged into and became part of the Community Bank System, Inc. 401(k) Employee Stock Ownership Plan.

Other Deferred Compensation Arrangements

In addition to the supplemental pension plans for certain executives, the Company has nonqualified deferred compensation arrangements for several former directors, officers and key employees.  All benefits provided under these plans are unfunded and payments to plan participants are made by the Company.  At December 31, 2017 and 2016, the Company has recorded a liability of $3.1 million and $3.2 million, respectively.  The expense recognized under these plans for the years ended December 31, 2017, 2016, and 2015 was approximately $0.3 million, $0.03 million, and $0.1 million, respectively.

Deferred Compensation Plans for Directors

Directors of the Company may defer all or a portion of their director fees under the Deferred Compensation Plan for Directors.  Under this plan, there is a separate account for each participating director which is credited with the amount of shares that could have been purchased with the director’s fees as well as any dividends on such shares.  On the distribution date, the director will receive common stock equal to the accumulated share balance in their account.  As of December 31, 2017 and 2016, there were 150,110 and 154,013 shares credited to the participants’ accounts, for which a liability of $4.2 million and $4.0 million was accrued, respectively.  The expense recognized under the plan for the years ended December 31, 2017, 2016 and 2015, was $0.2 million, $0.2 million, and $0.2 million, respectively.

The Company acquired deferred compensation plans for certain non-employee directors and trustees of Merchants.  Under the terms of these acquired deferred compensation plans, participating directors could elect to have all, or a specified percentage, of their Merchants director’s fees for a given year paid in the form of cash or deferred in the form of restricted shares of Merchants’ common stock.  Directors who elected to have their compensation deferred were credited with a number of shares of Merchants’ common stock equal in value to the amount of fees deferred.  These shares were converted to shares of Company stock in connection with the acquisition and are held in a rabbi trust.  The shares held in the rabbi trust are considered outstanding for purposes of computing earnings per share.  The participating director may not sell, transfer or otherwise dispose of these shares prior to distribution. With respect to shares of common stock issued or otherwise transferred to a participating director, the participating director has the right to receive dividends or other distributions thereon.

NOTE L: STOCK-BASED COMPENSATION PLANS

The Company has a long-term incentive program for directors, officers and employees.  Under this program, the Company initially authorized four million shares of Company common stock for the grant of incentive stock options, nonqualified stock options, restricted stock awards, and retroactive stock appreciation rights.  The long-term incentive program was amended effective May 25, 2011, May 14, 2014 and May 17, 2017 to authorize an additional 900,000 shares, 1,000,000 shares and 1,000,000 shares of Company common stock, respectively, for the grant of incentive stock options, nonqualified stock options, restricted stock awards, and retroactive stock appreciation rights.  As of December 31, 2017, the Company has authorization to grant up to approximately 1.7 million additional shares of Company common stock for these instruments.  The nonqualified (offset) stock options in its Director’s Stock Balance Plan vest and become exercisable immediately and expire one year after the date the director retires or two years in the event of death.  The remaining options have a ten-year term, and vest and become exercisable on a grant-by-grant basis, ranging from immediate vesting to ratably over a five-year period.

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Activity in this long-term incentive program is as follows:

	Stock Options
	Outstanding			Weighted- average Exercise Price of Shares
Outstanding at December 31, 2015		1,969,301		$	28.15
Granted		330,383			38.02
Exercised		(525,298	)		25.12
Forfeited		(18,394	)		34.47
Outstanding at December 31, 2016		1,755,992			30.85
Granted		197,943			57.02
Exercised		(238,499	)		25.72
Forfeited		(7,140	)		37.47
Outstanding at December 31, 2017		1,708,296			34.57
Exercisable at December 31, 2017		1,015,823		$	29.57

The following table summarizes the information about stock options outstanding under the Company’s stock option plan at December 31, 2017:

		Options outstanding						Options exercisable
Range of Exercise Price		Shares		Weighted- average Exercise Price		Weighted- average Remaining Life (years)		Shares		Weighted average Exercise Price
$	0.00 – $18.00		24,736	$	17.82		1.31		24,736	$	17.82
$	18.001 – $28.00		314,511		22.23		2.93		314,511		22.23
$	28.001 – $29.00		171,083		28.78		4.22		171,083		28.78
$	29.001 – $30.00		228,668		29.79		5.20		176,843		29.79
$	30.001 – $40.00		771,781		37.09		7.28		317,005		37.06
$	40.001 – $60.00		197,517		57.02		9.14		11,645		57.12
TOTAL			1,708,296	$	34.57		6.02		1,015,823	$	29.57

The weighted-average remaining contractual term of outstanding and exercisable stock options at December 31, 2017 is 6.02 years and 4.85 years, respectively.  The aggregate intrinsic value of outstanding and exercisable stock options at December 31, 2017 is $33.4 million and $24.6 million, respectively.

The Company recognized stock-based compensation expense related to non-qualified stock options of $2.2 million, $2.2 million and $1.8 million for the years ended December 31, 2017, 2016 and 2015, respectively.  A related income tax benefit was recognized of $0.8 million, $0.8 million and $0.7 million for the 2017, 2016 and 2015 years, respectively.  Compensation expense related to restricted stock vesting recognized in the income statement for 2017, 2016 and 2015 was approximately $2.7 million, $2.4 million and $2.2 million, respectively.

Management estimated the fair value of options granted using the Black-Scholes option-pricing model.  This model was originally developed to estimate the fair value of exchange-traded equity options, which (unlike employee stock options) have no vesting period or transferability restrictions.  As a result, the Black-Scholes model is not necessarily a precise indicator of the value of an option, but it is commonly used for this purpose.  The Black-Scholes model requires several assumptions, which management developed based on historical trends and current market observations.

	2017			2016			2015
Weighted-average Fair Value of Options Granted	$	12.78		$	7.90		$	7.48
Assumptions:
Weighted-average expected life (in years)		6.50			6.50			6.50
Future dividend yield		3.19	%		3.43	%		3.40	%
Share price volatility		29.71	%		30.00	%		30.34	%
Weighted-average risk-free interest rate		2.31	%		1.72	%		1.73	%

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Unrecognized stock-based compensation expense related to non-vested stock options totaled $4.6 million at December 31, 2017.  The weighted-average period over which this unrecognized expense would be recognized is 3.2 years.  The total fair value of stock options vested during 2017, 2016, and 2015 were $2.2 million, $2.1 million and $1.9 million, respectively.

During the 12 months ended December 31, 2017 and 2016, proceeds from stock option exercises totaled $7.7 million and $12.0 million, respectively, and the related tax benefits from exercise were approximately $2.3 million and $2.7 million, respectively.   During the twelve months ended December 31, 2017 and 2016, approximately 0.2 million and 0.4 million shares, respectively, were issued in connection with stock option exercises each year.  The total intrinsic value of options exercised during 2017, 2016 and 2015 were $7.6 million, $10.3 million and $7.6 million, respectively.

A summary of the status of the Company’s unvested restricted stock awards as of December 31, 2017, and changes during the twelve months ended December 31, 2017 and 2016, is presented below:

	Restricted Shares			Weighted-average grant date fair value
Unvested at December 31, 2015		246,311		$	27.85
Awards		148,240			27.04
Forfeitures		(42,394	)		17.49
Vestings		(98,327	)		25.64
Unvested at December 31, 2016		253,830			29.98
Awards		46,428			57.02
Forfeitures		(4,863	)		24.78
Vestings		(64,522	)		33.69
Unvested at December 31, 2017		230,873		$	34.06

Unrecognized stock-based compensation expense related to unvested restricted stock totaled $5.7 million at December 31, 2017, which will be recognized as expense over the next five years.  The weighted-average period over which this unrecognized expense would be recognized is 4.3 years.  The total fair value of restricted stock vested during 2017, 2016, and 2015 were $2.2 million, $2.5 million and $1.7 million, respectively.

NOTE M: EARNINGS PER SHARE

The two class method is used in the calculations of basic and diluted earnings per share.  Under the two class method, earnings available to common shareholders for the period are allocated between common shareholders and participating securities according to dividends declared and participation rights in undistributed earnings.  The Company has determined that all of its outstanding non-vested stock awards are participating securities as of December 31, 2017.

Basic earnings per share are computed based on the weighted-average of the common shares outstanding for the period.  Diluted earnings per share are based on the weighted-average of the shares outstanding and the assumed exercise of stock options during the year.  The dilutive effect of options is calculated using the treasury stock method of accounting.  The treasury stock method determines the number of common shares that would be outstanding if all the dilutive options (those where the average market price is greater than the exercise price) were exercised and the proceeds were used to repurchase common shares in the open market at the average market price for the applicable time period.  There were approximately 0.2 million, 0.3 million and 0.3 million weighted-average anti-dilutive stock options outstanding at December 31, 2017, 2016 and 2015, respectively, which were not included in the computation below.

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The following is a reconciliation of basic to diluted earnings per share for the years ended December 31, 2017, 2016 and 2015.

(000's omitted, except per share data)	2017			2016			2015
Net income	$	150,717		$	103,812		$	91,230
Income attributable to unvested stock-based compensation awards		(597	)		(550	)		(453	)
Income available to common shareholders	$	150,120		$	103,262		$	90,777
Weighted-average common shares outstanding - basic		48,843			44,091			40,996
Basic earnings per share	$	3.07		$	2.34		$	2.21
Net income	$	150,717		$	103,812		$	91,230
Income attributable to unvested stock-based compensation awards		(597	)		(550	)		(453	)
Income available to common shareholders	$	150,120		$	103,262		$	90,777
Weighted-average common shares outstanding		48,843			44,091			40,996
Assumed exercise of stock options		627			394			405
Weighted-average common shares outstanding – diluted		49,470			44,485			41,401
Diluted earnings per share	$	3.03		$	2.32		$	2.19
Cash dividends declared per share	$	1.32		$	1.26		$	1.22

Stock Repurchase Program

At its December 2016 meeting, the Board approved a stock repurchase program authorizing the repurchase of up to 2.2 million shares of the Company’s common stock, in accordance with securities laws and regulations, through December 31, 2017.  At its December 2017 meeting, the Board approved a similar program for 2018, authorizing the repurchase of up to 2.5 million shares of the Company’s common stock through December 31, 2018.  Any repurchased shares will be used for general corporate purposes, including those related to stock plan activities.  The timing and extent of repurchases will depend on market conditions and other corporate considerations as determined at the Company’s discretion.  There were no stock repurchases pursuant to the announced plans in 2017 or 2016.  During 2015, the Company repurchased approximately 0.3 million shares of its common stock in open market transactions.

NOTE N: COMMITMENTS, CONTINGENT LIABILITIES AND RESTRICTIONS

The Company is a party to financial instruments with off-balance-sheet risk in the normal course of business to meet the financing needs of its customers.  These financial instruments consist primarily of commitments to extend credit and standby letters of credit.  Commitments to extend credit are agreements to lend to customers, generally having fixed expiration dates or other termination clauses that may require payment of a fee.  These commitments consist principally of unused commercial and consumer credit lines.  Standby letters of credit generally are contingent upon the failure of the customer to perform according to the terms of an underlying contract with a third party.  The credit risks associated with commitments to extend credit and standby letters of credit are essentially the same as that involved with extending loans to customers and are subject to the Company’s normal credit policies.  Collateral may be obtained based on management’s assessment of the customer’s creditworthiness.  The fair value of the standby letters of credit is immaterial for disclosure.

The contract amounts of commitments and contingencies are as follows at December 31:

(000's omitted)	2017		2016
Commitments to extend credit	$	1,080,004	$	773,442
Standby letters of credit		23,782		22,656
Total	$	1,103,786	$	796,098

The Bank has unused lines of credit of $25.0 million at December 31, 2017.  The Bank has unused borrowing capacity of approximately $1.68 billion through collateralized transactions with the FHLB and $22.9 million through collateralized transactions with the Federal Reserve.

The Company is required to maintain a reserve balance, as established by the Federal Reserve.  The required average total reserve for the 14-day maintenance period of December 21, 2017 through January 3, 2018 was $84.8 million, with $73.2 million represented by cash on hand and the remaining $11.6 million was required to be on deposit with the Federal Reserve.

94

The Company and its subsidiaries are subject in the normal course of business to various pending and threatened legal proceedings in which claims for monetary damages are asserted. As of December 31, 2017, management, after consultation with legal counsel, does not anticipate that the aggregate ultimate liability arising out of litigation pending or threatened against the Company or its subsidiaries will be material to the Company’s consolidated financial position. On at least a quarterly basis the Company assesses its liabilities and contingencies in connection with such legal proceedings. For those matters where it is probable that the Company will incur losses and the amounts of the losses can be reasonably estimated, the Company records an expense and corresponding liability in its consolidated financial statements. To the extent the pending or threatened litigation could result in exposure in excess of that liability, the amount of such excess is not currently estimable. The range of reasonably possible losses for matters where an exposure is not currently estimable or considered probable, beyond the existing recorded liabilities, is between $0 and $1 million in the aggregate. Although the Company does not believe that the outcome of pending litigation will be material to the Company’s consolidated financial position, it cannot rule out the possibility that such outcomes will be material to the consolidated results of operations for a particular reporting period in the future.

NOTE O: LEASES

The Company leases buildings, office space, and equipment under agreements that expire in various years.  Rental expense included in operating expenses amounted to $7.3 million, $5.8 million and $5.4 million in 2017, 2016 and 2015, respectively.  The future minimum rental commitments as of December 31, 2017 for all non-cancelable operating leases are as follows:

2018	$	9,189
2019		8,194
2020		6,603
2021		5,164
2022		4,101
Thereafter		8,623
Total	$	41,874

NOTE P: REGULATORY MATTERS

The Company and the Bank are subject to various regulatory capital requirements administered by federal banking agencies.  Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company’s financial statements.  Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and the Bank must meet specific capital guidelines that involve quantitative measures of the Company’s and the Bank’s assets, liabilities, and certain off-balance sheet items as calculated under regulatory accounting practices.  The Company’s and the Bank's capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors.  Management believes, as of December 31, 2017, that the Company and Bank meet all applicable capital adequacy requirements.

Basel III Transitional rules became effective for the Company on January 1, 2015 with all of the requirements being phased in over a multi-year schedule, and fully phased in by January 1, 2019.  Beginning in 2016, the Company and the Bank are required to maintain a “capital conservation buffer,” composed entirely of common equity Tier 1 capital, in addition to minimum risk-based capital ratios.  The required capital conservation buffer is 1.25% for 2017 and 0.625% for 2016.  Therefore, to satisfy both the minimum risk-based capital ratios and the capital conservation buffer in 2017, the Company and the Bank must maintain: (i) Common equity Tier 1 capital to total risk-weighted assets of at least 5.75%, (ii) Tier 1 capital to total risk-weighted assets of at least 7.25%, and (iii) Total capital (Tier 1 capital plus Tier 2 capital) to total risk-weighted assets of at least 9.25%.  To satisfy both the minimum risk-based capital ratios and the capital conservation buffer in 2016, the Company and the Bank must maintain: (i) Common equity Tier 1 capital to total risk-weighted assets of at least 5.125%, (ii) Tier 1 capital to total risk-weighted assets of at least 6.625%, and (iii) Total capital (Tier 1 capital plus Tier 2 capital) to total risk-weighted assets of at least 8.625%. As of December 31, 2017 and 2016, the amounts, ratios and requirements for the Company are presented below calculated under the Basel III Standardized Transitional Approach.  As of December 31, 2017, the OCC categorized the Company and Bank as “well capitalized” under the regulatory framework for prompt corrective action.

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	Actual					For capital adequacy purposes					For capital adequacy purposes plus Capital Conservation Buffer					To be well-capitalized under prompt corrective action
(000’s omitted)	Amount		Ratio			Amount		Ratio			Amount		Ratio			Amount		Ratio
Community Bank System, Inc.:
2017
Tier 1 Leverage ratio	$	995,860		10.00	%	$	398,183		4.00	%						$	497,729		5.00	%
Tier 1 risk-based capital		995,860		16.64	%		358,988		6.00	%	$	433,777		7.25	%		478,651		8.00	%
Total risk-based capital		1,043,910		17.45	%		478,651		8.00	%		553,440		9.25	%		598,314		10.00	%
Common equity tier 1 capital		876,685		14.65	%		269,241		4.50	%		344,030		5.75	%		388,904		6.50	%

2016
Tier 1 Leverage ratio	$	858,347	10.55	%	$	325,438	4.00	%					$	406,798	5.00	%
Tier 1 risk-based capital		858,347	18.10	%		284,583	6.00	%	$	314,228	6.625	%		379,445	8.00	%
Total risk-based capital		905,996	19.10	%		379,445	8.00	%		409,089	8.625	%		474,306	10.00	%
Common equity tier 1 capital		759,199	16.01	%		213,438	4.50	%		243,082	5.125	%		308,299	6.50	%

Community Bank, N.A.:
2017
Tier 1 Leverage ratio	$	859,538	8.71	%	$	394,981	4.00	%					$	493,726	5.00	%
Tier 1 risk-based capital		859,538	14.50	%		355,641	6.00	%	$	429,733	7.25	%		474,188	8.00	%
Total risk-based capital		907,588	15.31	%		474,188	8.00	%		548,280	9.25	%		592,736	10.00	%
Common equity tier 1 capital		859,483	14.50	%		266,731	4.50	%		340,823	5.75	%		385,278	6.50	%

2016
Tier 1 Leverage ratio	$	672,633	8.30	%	$	324,080	4.00	%					$	405,099	5.00	%
Tier 1 risk-based capital		672,633	14.28	%		282,662	6.00	%	$	312,106	6.625	%		376,883	8.00	%
Total risk-based capital		720,282	15.29	%		376,883	8.00	%		406,327	8.625	%		471,104	10.00	%
Common equity tier 1 capital		672,578	14.28	%		211,997	4.50	%		241,441	5.125	%		306,217	6.50	%

NOTE Q: PARENT COMPANY STATEMENTS

The condensed statements of condition of the parent company at December 31 are as follows:

(000's omitted)	2017		2016
Assets:
Cash and cash equivalents	$	84,460	$	151,127
Investment securities		4,322		3,628
Investment in and advances to:
Bank subsidiary		1,511,780		1,116,554
Non-bank subsidiaries		169,341		35,566
Other assets		9,150		10,345
Total assets	$	1,779,053	$	1,317,220
Liabilities and shareholders' equity:
Accrued interest and other liabilities	$	20,924	$	16,950
Borrowings		122,814		102,170
Shareholders' equity		1,635,315		1,198,100
Total liabilities and shareholders' equity	$	1,779,053	$	1,317,220

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The condensed statements of income of the parent company for the years ended December 31 is as follows:

(000's omitted)	2017			2016			2015
Revenues:
Dividends from subsidiaries:
Bank subsidiary	$	91,000		$	89,000		$	70,000
Non-bank subsidiaries		35,500			1,750			6,000
Interest and dividends on investments		133			102			94
Total revenues		126,633			90,852			76,094
Expenses:
Interest on borrowings		3,904			2,949			2,537
Acquisition expenses		91			429			0
Other expenses		26			11			19
Total expenses		4,021			3,389			2,556
Income before tax benefit and equity in undistributed net income of subsidiaries		122,612			87,463			73,538
Income tax benefit/(expense)		1,930			866			(572	)
Income before equity in undistributed net income of subsidiaries		124,542			88,329			72,966
Equity in undistributed net income of subsidiaries		26,175			15,483			18,264
Net income	$	150,717		$	103,812		$	91,230
Other comprehensive (loss), net of tax:
Changes in other comprehensive income/(loss) related to pension and other post retirement obligations		168			3,322			(4,567	)
Changes in other comprehensive loss related to unrealized losses on available-for-sale securities		(11,065	)		(14,714	)		(6,918	)
Other comprehensive loss		(10,897	)		(11,392	)		(11,485	)
Comprehensive income	$	139,820		$	92,420		$	79,745

97

The statements of cash flows of the parent company for the years ended December 31 is as follows:

(000's omitted)	2017			2016			2015
Operating activities:
Net income	$	150,717		$	103,812		$	91,230
Adjustments to reconcile net income to net cash provided by operating activities
Equity in undistributed net income of subsidiaries		(26,175	)		(15,483	)		(18,264	)
Net change in other assets and other liabilities		1,870			(215	)		(27	)
Net cash provided by operating activities		126,412			88,114			72,939
Investing activities:
Proceeds from sale of investment securities		0			0			0
Cash (paid)/received for acquisitions, net of cash acquired of $150,534, $0, and $81,772, respectively		(139,471	)		0			25,505
Capital contributions to subsidiaries		(11,063	)		0			(80,231	)
Net cash used in investing activities		(150,534	)		0			(54,726	)
Financing activities:
Issuance of common stock		9,700			15,326			13,975
Purchase of treasury stock		(3,306	)		(3,470	)		(9,126	)
Sale of treasury stock		10,060			8,888			16,571
Increase in deferred compensation arrangements		3,306			0			0
Cash dividends paid		(62,305	)		(55,048	)		(49,273	)
Net cash used in financing activities		(42,545	)		(34,304	)		(27,853	)
Change in cash and cash equivalents		(66,667	)		53,810			(9,640	)
Cash and cash equivalents at beginning of year		151,127			97,317			106,957
Cash and cash equivalents at end of year	$	84,460		$	151,127		$	97,317
Supplemental disclosures of cash flow information:
Cash paid for interest	$	3,826		$	2,909		$	2,523
Supplemental disclosures of noncash financing activities
Dividends declared and unpaid	$	17,460		$	14,268		$	13,605
Capital contributions to subsidiaries		513,769			0			76,461
Common stock issued for acquisition		343,132			0			102,202

NOTE R: FAIR VALUE

Accounting standards allow entities an irrevocable option to measure certain financial assets and financial liabilities at fair value.  Unrealized gains and losses on items for which the fair value option has been elected are reported in earnings.  The Company has elected to value mortgage loans held for sale at fair value in order to more closely match the gains and losses associated with loans held for sale with the gains and losses on forward sales contracts.  Accordingly, the impact on the valuation will be recognized in the Company’s consolidated statement of income.  All mortgage loans held for sale are current and in performing status.

Accounting standards establish a framework for measuring fair value and require certain disclosures about such fair value instruments.  It defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (i.e. exit price).  Inputs used to measure fair value are classified into the following hierarchy:

● Level 1 – Quoted prices in active markets for identical assets or liabilities.

· Level 2 – Quoted prices in active markets for similar assets or liabilities, or quoted prices for identical or similar assets or     liabilities in markets that are not active, or inputs other than quoted prices that are observable for the asset or liability.

· Level 3 – Significant valuation assumptions not readily observable in a market.

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A financial instrument’s categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement.  The following tables set forth the Company’s financial assets and liabilities that were accounted for at fair value on a recurring basis.  There were no transfers between any of the levels for the periods presented.

	December 31, 2017
(000's omitted)	Level 1		Level 2			Level 3		Total Fair Value
Available-for-sale investment securities:
U.S. Treasury and agency securities	$	1,909,290	$	144,781		$	0	$	2,054,071
Obligations of state and political subdivisions		0		528,956			0		528,956
Government agency mortgage-backed securities		0		357,538			0		357,538
Corporate debt securities		0		2,623			0		2,623
Government agency collateralized mortgage obligations		0		87,374			0		87,374
Marketable equity securities		526		0			0		526
Total available-for-sale investment securities		1,909,816		1,121,272			0		3,031,088
Mortgage loans held for sale		0		461			0		461
Commitments to originate real estate loans for sale		0		0			89		89
Forward sales commitments		0		4			0		4
Interest rate swap agreements asset		0		1,064			0		1,064
Interest rate swap agreements liability		0		(904	)		0		(904	)
Total	$	1,909,816	$	1,121,897		$	89	$	3,031,802

	December 31, 2016
(000's omitted)	Level 1		Level 2		Level 3		Total Fair Value
Available-for-sale investment securities:
U.S. Treasury and agency securities	$	1,902,762	$	0	$	0	$	1,902,762
Obligations of state and political subdivisions		0		594,990		0		594,990
Government agency mortgage-backed securities		0		235,230		0		235,230
Corporate debt securities		0		5,687		0		5,687
Government agency collateralized mortgage obligations		0		9,535		0		9,535
Marketable equity securities		452		0		0		452
Total available-for-sale investment securities		1,903,214		845,442		0		2,748,656
Mortgage loans held for sale		0		2,416		0		2,416
Commitments to originate real estate loans for sale		0		0		54		54
Forward sales commitments		0		3		0		3
Total	$	1,903,214	$	847,861	$	54	$	2,751,129

The valuation techniques used to measure fair value for the items in the table above are as follows:

· Available for sale investment securities – The fair value of available-for-sale investment securities is based upon quoted prices, if available.  If quoted prices are not available, fair values are measured using quoted market prices for similar securities or model-based valuation techniques.  Level 1 securities include U.S. Treasury obligations and marketable equity securities that are traded by dealers or brokers in active over-the-counter markets.  Level 2 securities include U.S. agency securities, mortgage-backed securities issued by government-sponsored entities, municipal securities and corporate debt securities that are valued by reference to prices for similar securities or through model-based techniques in which all significant inputs, such as reported trades, trade execution data, LIBOR swap yield curve, market prepayment speeds, credit information, market spreads, and security’s terms and conditions, are observable.  See Note C for further disclosure of the fair value of investment securities.

· Mortgage loans held for sale – Mortgage loans held for sale are carried at fair value, which is determined using quoted secondary-market prices of loans with similar characteristics and, as such, have been classified as a Level 2 valuation.  The unpaid principal value of mortgage loans held for sale at December 31, 2017 is approximately $0.5 million.  The unrealized gain on mortgage loans held for sale of approximately $13,000 was recognized in other banking services in the Consolidated Statement of Income for the year ended December 31, 2017.

99

· Forward sales commitments – The Company enters into forward sales commitments to sell certain residential real estate loans.  Such commitments are considered to be derivative financial instruments and, therefore, are carried at estimated fair value in the other asset or other liability section of the consolidated statement of condition.  The fair value of these forward sales commitments is primarily measured by obtaining pricing from certain government-sponsored entities and reflects the underlying price the entity would pay the Company for an immediate sale on these mortgages.  As such, these instruments are classified as Level 2 in the fair value hierarchy.

· Commitments to originate real estate loans for sale – The Company enters into various commitments to originate residential real estate loans for sale.  Such commitments are considered to be derivative financial instruments and, therefore, are carried at estimated fair value in the other asset or other liability section of the consolidated statement of condition.  The estimated fair value of these commitments is determined using quoted secondary market prices obtained from certain government-sponsored entities.  Additionally, accounting guidance requires the expected net future cash flows related to the associated servicing of the loan to be included in the fair value measurement of the derivative.  The expected net future cash flows are based on a valuation model that calculates the present value of estimated net servicing income.  The valuation model incorporates assumptions that market participants would use in estimating future net servicing income.  Such assumptions include estimates of the cost of servicing loans, appropriate discount rate and prepayment speeds.  The determination of expected net cash flows is considered a significant unobservable input contributing to the Level 3 classification of commitments to originate real estate loans for sale.

· Interest rate swap agreements – The interest rate swaps are reported at their fair value utilizing Level 2 inputs from third parties.  The fair value of our interest rate swaps are determined using prices obtained from a third party advisor.  The fair value measurement of the interest rate swap is determined by netting the discounted future fixed cash payments and the discounted expected variable cash receipts.  The variable cash receipts are based on the expectation of future interest rates derived from observed market interest rate curves.

 The changes in Level 3 assets measured at fair value on a recurring basis are immaterial.

Assets and liabilities measured on a non-recurring basis:

	December 31, 2017								December 31, 2016
(000's omitted)	Level 1		Level 2		Level 3		Total Fair Value		Level 1		Level 2		Level 3		Total Fair Value
Impaired loans	$	0	$	0	$	0	$	0	$	0	$	0	$	633	$	633
Other real estate owned		0		0		1,915		1,915		0		0		1,966		1,966
Total	$	0	$	0	$	1,915	$	1,915	$	0	$	0	$	2,599	$	2,599

Loans are generally not recorded at fair value on a recurring basis.  Periodically, the Company records nonrecurring adjustments to the carrying value of loans based on fair value measurements for partial charge-offs of the uncollectible portions of those loans.  Nonrecurring adjustments also include certain impairment amounts for collateral-dependent loans calculated when establishing the allowance for credit losses. Such amounts are generally based on the fair value of the underlying collateral supporting the loan and, as a result, the carrying value of the loan less the calculated valuation amount does not necessarily represent the fair value of the loan. Real estate collateral is typically valued using independent appraisals or other indications of value based on recent comparable sales of similar properties or assumptions generally observable in the marketplace, adjusted for non-observable inputs.  Thus, the resulting nonrecurring fair value measurements are generally classified as Level 3. Estimates of fair value used for other collateral supporting commercial loans generally are based on assumptions not observable in the marketplace and, therefore, such valuations classify as Level 3.

100

Other real estate owned (“OREO”) is valued at the time the loan is foreclosed upon and the asset is transferred to OREO. The value is based primarily on third party appraisals, less estimated costs to sell. The appraisals are sometimes further discounted based on management’s historical knowledge, changes in market conditions from the time of valuation, and/or management’s expertise and knowledge of the customer and customer’s business. Such discounts are significant, ranging from 9% to 99% at December 31, 2017, and result in a Level 3 classification of the inputs for determining fair value. OREO is reviewed and evaluated on at least a quarterly basis for additional impairment and adjusted accordingly, based on the same factors identified above. The Company recovers the carrying value of OREO through the sale of the property. The ability to affect future sales prices is subject to market conditions and factors beyond the Company’s control and may impact the estimated fair value of a property.

Originated mortgage servicing rights are recorded at their fair value at the time of sale of the underlying loan, and are amortized in proportion to and over the estimated period of net servicing income.  The fair value of mortgage servicing rights is based on a valuation model incorporating inputs that market participants would use in estimating future net servicing income.  Such inputs include estimates of the cost of servicing loans, appropriate discount rate, and prepayment speeds and are considered to be unobservable and contribute to the Level 3 classification of mortgage servicing rights.  In accordance with GAAP, the Company must record impairment charges, on a nonrecurring basis, when the carrying value of a stratum exceeds its estimated fair value.  Impairment is recognized through a valuation allowance.  There is no valuation allowance at December 31, 2017 as the fair value of mortgage servicing rights of approximately $2.5 million exceeded the carrying value of approximately $1.4 million.

The Company evaluates goodwill for impairment on an annual basis, or more often if events or circumstances indicate there may be impairment.  The fair value of each reporting unit is compared to the carrying amount of that reporting unit in order to determine if impairment is indicated.  If so, the implied fair value of the reporting unit’s goodwill is compared to its carrying amount and the impairment loss is measured by the excess of the carrying value of the goodwill over fair value of the goodwill.  In such situations, the Company performs a discounted cash flow modeling technique that requires management to make estimates regarding the amount and timing of expected future cash flows of the assets and liabilities of the reporting unit that enable the Company to calculate the implied fair value of the goodwill.  It also requires use of a discount rate that reflects the current return expectation of the market in relation to present risk-free interest rates, expected equity market premiums, peer volatility indicators and company-specific risk indicators.  The Company did not recognize an impairment charge during 2017 or 2016.

The significant unobservable inputs used in the determination of fair value of assets classified as Level 3 on a recurring or non-recurring basis as of December 31, 2017 are as follows:

(000's omitted)	Fair Value		Valuation Technique	Significant Unobservable Inputs	Significant Unobservable Input Range (Weighted Average)
Other real estate owned	$	1,915	Fair value of collateral	Estimated cost of disposal/market adjustment		9.0% - 99.0% (38.5	%)
Commitments to originate real estate loans for sale		89	Discounted cash flow	Embedded servicing value		1	%

The significant unobservable inputs used in the determination of fair value of assets classified as Level 3 on a recurring or non-recurring basis as of December 31, 2016 are as follows:

(000's omitted)	Fair Value		Valuation Technique	Significant Unobservable Inputs	Significant Unobservable Input Range (Weighted Average)
Other real estate owned	$	1,966	Fair value of collateral	Estimated cost of disposal/market adjustment		9.0% - 97.0% (29.6	%)
Impaired loans		633	Fair value of collateral	Estimated cost of disposal/market adjustment		15.0% - 50.0% (36.5	%)
Commitments to originate real estate loans for sale		54	Discounted cash flow	Embedded servicing value		1	%

The Company determines fair values based on quoted market values, where available, estimates of present values, or other valuation techniques.  Those techniques are significantly affected by the assumptions used, including, but not limited to, the discount rate and estimates of future cash flows.  In that regard, the derived fair value estimates cannot be substantiated by comparison to independent markets and, in many cases, may not be realized in immediate settlement of the instrument.  Certain financial instruments and all nonfinancial instruments are excluded from fair value disclosure requirements.  Accordingly, the aggregate fair value amounts presented do not represent the underlying value of the Company.

101

The carrying amounts and estimated fair values of the Company’s other financial instruments that are not accounted for at fair value at December 31, 2017 and 2016 are as follows:

	December 31, 2017				December 31, 2016
(000's omitted)	Carrying Value		Fair Value		Carrying Value		Fair Value
Financial assets:
Net loans	$	6,209,174	$	6,244,941	$	4,901,329		4,935,140
Financial liabilities:
Deposits		8,444,420		8,431,481		7,075,954		7,071,191
Short-term borrowings		24,000		24,000		146,200		146,200
Securities sold under agreement to repurchase, short-term		337,011		337,011		0		0
Other long-term debt		2,071		2,021		0		0
Subordinated debt held by unconsolidated subsidiary trusts		122,814		122,814		102,170		90,144

The following is a further description of the principal valuation methods used by the Company to estimate the fair values of its financial instruments.

Loans have been classified as a Level 3 valuation.  Fair values for variable rate loans that reprice frequently are based on carrying values.  Fair values for fixed rate loans are estimated using discounted cash flows and interest rates currently being offered for loans with similar terms to borrowers of similar credit quality.

Deposits have been classified as a Level 2 valuation.  The fair value of demand deposits, interest-bearing checking deposits, savings accounts and money market deposits is the amount payable on demand at the reporting date.  The fair value of time deposit obligations are based on current market rates for similar products.

Borrowings and subordinated debt held by unconsolidated subsidiary trusts have been classified as a Level 2 valuation.  The fair value of FHLB overnight advances and securities sold under agreement to repurchase, short-term, is the amount payable on demand at the reporting date.  Fair values for long-term borrowings and subordinated debt held by unconsolidated subsidiary trusts are estimated using discounted cash flows and interest rates currently being offered on similar securities.  The difference between the carrying values of long-term borrowings and subordinated debt held by unconsolidated subsidiary trusts, and their fair values, are not material as of the reporting dates.

Other financial assets and liabilities – Cash and cash equivalents have been classified as a Level 1 valuation, while accrued interest receivable and accrued interest payable have been classified as a Level 2 valuation.  The fair values of each approximate the respective carrying values because the instruments are payable on demand or have short-term maturities and present relatively low credit risk and interest rate risk.

NOTE S: DERIVATIVE INSTRUMENTS

The Company is party to derivative financial instruments in the normal course of its business to meet the financing needs of its customers and to manage its own exposure to fluctuations in interest rates.  These financial instruments have been limited to interest rate swap agreements, commitments to originate real estate loans held for sale and forward sales commitments.  The Company does not hold or issue derivative financial instruments for trading or other speculative purposes.

The Company enters into forward sales commitments for the future delivery of residential mortgage loans, and interest rate lock commitments to fund loans at a specified interest rate.  The forward sales commitments are utilized to reduce interest rate risk associated with interest rate lock commitments and loans held for sale.  Changes in the estimated fair value of the forward sales commitments and interest rate lock commitments subsequent to inception are based on changes in the fair value of the underlying loan resulting from the fulfillment of the commitment and changes in the probability that the loan will fund within the terms of the commitment, which is affected primarily by changes in interest rates and the passage of time.  At inception and during the life of the interest rate lock commitment, the Company includes the expected net future cash flows related to the associated servicing of the loan as part of the fair value measurement of the interest rate lock commitments.  These derivatives are recorded at fair value, which were immaterial at December 31, 2017.  The effect of the changes to these derivatives for the year then ended was also immaterial.

102

The Company acquired interest rate swaps from the Merchants acquisition with notional amounts with certain commercial customers which totaled $38.9 million at December 31, 2017.  In order to minimize the Company’s risk, these customer derivatives (pay floating/receive fixed swaps) have been offset with essentially matching interest rate swaps (pay fixed/receive floating swaps) with the Company’s counterparty totaling $38.9 million. The weighted average receive rate of these interest rate swaps was 3.38%, the weighted average pay rate was 3.84% and the weighted average maturity was 6.5 years.  The fair values of $0.9 million and $0.9 million were reflected in other assets and other liabilities, respectively, in the accompanying consolidated statement of condition at December 31, 2017. Hedge accounting has not been applied for these derivatives.  Since the terms of the swaps with our customer and the other financial institution offset each other, with the only difference being counterparty credit risk, changes in the fair value of the underlying derivative contracts are not materially different and do not significantly impact our results of operations.

The Company also acquired interest rate swaps from the Merchants acquisition with notional amounts totaling $7.0 million at December 31, 2017 that were designated as fair value hedges of certain fixed rate loans with municipalities. At December 31, 2017, the weighted average receive rate of these interest rate swaps was 2.30%, the weighted average pay rate was 3.11% and the weighted average maturity was 15.5 years. The fair value of $0.2 million at December 31, 2017, was reflected as a reduction to loans and an increase to other assets.  The ineffective portion of the interest swaps was immaterial and as such, amounts are not recognized in earnings.

The Company assessed its counterparty risk at December 31, 2017 and determined any credit risk inherent in our derivative contracts was not material. Information about the fair value of derivative financial instruments can be found in Note R to these consolidated financial statements.

NOTE T: VARIABLE INTEREST ENTITIES

The Company’s wholly-owned subsidiaries, Community Statutory Trust III, Community Capital Trust IV and MBVT Statutory Trust I, are VIEs for which the Company is not the primary beneficiary.  Accordingly, the accounts of these entities are not included in the Company’s consolidated financial statements.  See further information regarding Community Statutory Trust III, Community Capital Trust IV and MBVT Statutory Trust I in Note H: Borrowings.

In connection with the Company’s acquisition of Oneida, the Company acquired OPFC II which holds a 50% membership interest in 706 North Clinton, LLC (“706 North Clinton”), an entity formed for the purpose of acquiring and rehabilitating real property.  The real property held by 706 North Clinton is principally occupied by subsidiaries of the Company. The Company analyzed the operating agreement and capital structure of 706 North Clinton and determined that it was the primary beneficiary and therefore should consolidate 706 North Clinton in its financial statements.  This conclusion was based on the determination that the Company has a de facto agency relationship because of the financing arrangement between the other member of 706 North Clinton and the Bank which provides OPFC II with both the power to direct the activities of 706 North Clinton and the obligation to absorb any losses of 706 North Clinton.

The carrying amount of the assets and liabilities of 706 North Clinton and the classification of these assets and liabilities in the Company’s consolidated statements of condition at December 31 is as follows:

(000's omitted)	2017		2016
Cash and cash equivalents	$	74	$	30
Premises and equipment, net		6,266		6,429
Other assets		5		0
Total assets	$	6,345	$	6,459
Accrued interest and other liabilities / Total liabilities	$	0	$	1

In addition to the assets and liabilities of 706 North Clinton, the minority interest in 706 North Clinton of $3.2 million at December 31, 2017 is included in the Company’s consolidated statement of condition.  The creditors of 706 North Clinton do not have a claim on the general assets of the Company.  The Company’s maximum loss exposure net of minority interest in 706 North Clinton is approximately $4.7 million as of December 31, 2017, including a $1.5 million loss exposure related to the financing agreement between the other member of 706 North Clinton and the Bank.

103

NOTE U: SEGMENT INFORMATION

Operating segments are components of an enterprise, which are evaluated regularly by the “chief operating decision maker” in deciding how to allocate resources and assess performance.  The Company’s chief operating decision maker is the President and Chief Executive Officer of the Company. The Company has identified Banking, Employee Benefit Services and All Other as its reportable operating business segments.  CBNA operates the Banking segment that provides full-service banking to consumers, businesses, and governmental units in Upstate New York as well as Northeastern Pennsylvania, Vermont and Western Massachusetts.  Employee Benefit Services, which includes operating subsidiaries of BPAS, BPAS-APS, BPAS Trust Company of Puerto Rico, NRS and HB&T, provides employee benefit trust, collective investment fund, retirement plan administration, fund administration, transfer agency, actuarial, VEBA/HRA, and health and welfare consulting services.  The All Other segment is comprised of; (a) wealth management services including trust services provided by the personal trust unit within the Bank, broker-dealer and investment advisory services provided by CISI and The Carta Group, and asset management provided by Nottingham, and (b) full-service insurance, risk management and employee benefit services provided by OneGroup.  The accounting policies used in the disclosure of business segments are the same as those described in the summary of significant accounting policies (See Note A).

Information about reportable segments and reconciliation of the information to the consolidated financial statements follows:

(000's omitted)	Banking		Employee Benefit Services		All Other		Eliminations			Consolidated Total
2017
Net interest income	$	315,025	$	396	$	254	$	0		$	315,675
Provision for loan losses		10,984		0		0		0			10,984
Noninterest income		73,337		82,743		49,201		(2,858	)		202,423
Amortization of intangible assets		5,296		8,578		3,067		0			16,941
Acquisition expenses		24,549		1,194		243		0			25,986
Other operating expenses		218,608		51,138		37,334		(2,858	)		304,222
Income before income taxes	$	128,925	$	22,229	$	8,811	$	0		$	159,965
Assets	$	10,505,919	$	203,369	$	66,548	$	(29,638	)	$	10,746,198
Goodwill	$	629,916	$	84,449	$	20,065	$	0		$	734,430
2016
Net interest income	$	273,542	$	162	$	192	$	0		$	273,896
Provision for loan losses		8,076		0		0		0			8,076
Noninterest income		66,059		48,261		43,747		(2,442	)		155,625
Amortization of intangible assets		2,682		420		2,377		0			5,479
Acquisition expenses		1,005		445		256		0			1,706
Other operating expenses		190,263		36,892		34,950		(2,442	)		259,663
Income before income taxes	$	137,575	$	10,666	$	6,356	$	0		$	154,597
Assets	$	8,598,057	$	38,742	$	71,428	$	(41,790	)	$	8,666,437
Goodwill	$	440,870	$	8,019	$	16,253	$	0		$	465,142
2015
Net interest income	$	248,167	$	132	$	121	$	0		$	248,420
Provision for loan losses		6,447		0		0		0			6,447
Noninterest income		57,704		46,784		20,967		(2,156	)		123,299
Amortization of intangible assets		2,803		515		345		0			3,663
Acquisition expenses		6,947		21		69		0			7,037
Other operating expenses		174,918		35,197		14,396		(2,156	)		222,355
Income before income taxes	$	114,756	$	11,183	$	6,278	$	0		$	132,217
Assets	$	8,513,228	$	35,011	$	70,067	$	(65,637	)	$	8,552,669
Goodwill	$	439,052	$	8,019	$	16,181	$	0		$	463,252

104

Report on Internal Control Over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rule 13a-15(f).  Under the supervision and with the participation of our management, including our principal executive officer and principal financial officer, we conducted an evaluation of the effectiveness of our internal control over financial reporting based on the framework in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission.  Based on our evaluation, management concluded that our internal control over financial reporting was effective as of December 31, 2017.

The consolidated financial statements of the Company have been audited by PricewaterhouseCoopers LLP, an independent registered public accounting firm that was engaged to express an opinion as to the fairness of presentation of such financial statements.  PricewaterhouseCoopers LLP was also engaged to audit the effectiveness of the Company’s internal control over financial reporting.  The report of PricewaterhouseCoopers LLP follows this report.

Community Bank System, Inc.

By:  /s/ Mark E. Tryniski

Mark E. Tryniski,

President, Chief Executive Officer and Director

By:  /s/ Scott  Kingsley

Scott Kingsley,

Treasurer and Chief Financial Officer

105

Report of Independent Registered Public Accounting Firm

To theBoard of Directors and Shareholders of Community Bank System, Inc.

Opinions on the Financial Statements and Internal Control over Financial Reporting

We have audited the accompanying consolidated statements of condition of Community Bank System, Inc. and its subsidiaries as of December 31, 2017 and 2016, and the related consolidated statements of income, comprehensive income, changes in shareholders’ equity, and cash flows for each of the three years in the period ended December 31, 2017, including the related notes (collectively referred to as the “consolidated financial statements”).  We also have audited the Company's internal control over financial reporting as of December 31, 2017, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).

In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the financial position of the Company as of December 31, 2017 and 2016, and the results of their operations and their cash flows for each of the three years in the period ended December 31, 2017in conformity with accounting principles generally accepted in the United States of America.  Also in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2017, based on criteria established in Internal Control - Integrated Framework (2013) issued by the COSO.

Basis for Opinions

The Company's management is responsible for these consolidated financial statements, for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Report on Internal Control over Financial Reporting.  Our responsibility is to express opinions on the Company’s consolidated financial statements and on the Company's internal control over financial reporting based on our audits.  We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) ("PCAOB") and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB.  Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the consolidatedfinancial statements are free of material misstatement, whether due to error or fraud, and whether effective internal control over financial reporting was maintained in all material respects.

Our audits of the consolidated financial statements included performing procedures to assess the risks of material misstatement of the consolidated financial statements, whether due to error or fraud, and performing procedures that respond to those risks.  Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the consolidated financial statements.  Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the consolidated financial statements.  Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk.  Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.

Definition and Limitations of Internal Control over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles.  A company’s internal control over financial reporting includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

106

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements.  Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/PricewaterhouseCoopers LLP

Buffalo, New York

March 1, 2018

We have served as the Company’s auditor since 1984.

107

TWO YEAR SELECTED QUARTERLY DATA (Unaudited)

2017 Results (000's omitted, except per share data)	4th Quarter			3rd Quarter		2nd Quarter		1st Quarter		Total
Net interest income	$	85,977		$	84,395	$	78,029	$	67,274	$	315,675
Provision for loan losses		5,381			2,314		1,461		1,828		10,984
Net interest income after provision for loan losses		80,596			82,081		76,568		65,446		304,691
Noninterest income		53,938			52,941		51,226		44,318		202,423
Noninterest expenses		86,919			83,776		102,879		73,575		347,149
Income before income taxes		47,615			51,246		24,915		36,189		159,965
Income taxes		(24,411	)		16,003		7,724		9,932		9,248
Net income	$	72,026		$	35,243	$	17,191	$	26,257	$	150,717
Basic earnings per share	$	1.41		$	0.69	$	0.35	$	0.58	$	3.07
Diluted earnings per share	$	1.40		$	0.68	$	0.35	$	0.57	$	3.03

2016 Results (000's omitted, except per share data)	4th Quarter		3rd Quarter		2nd Quarter		1st Quarter		Total
Net interest income	$	70,246	$	68,463	$	68,306	$	66,881	$	273,896
Provision for loan losses		2,640		1,790		2,305		1,341		8,076
Net interest income after provision for loan losses		67,606		66,673		66,001		65,540		265,820
Noninterest income		38,620		39,952		38,772		38,281		155,625
Noninterest expenses		66,597		66,226		66,356		67,669		266,848
Income before income taxes		39,629		40,399		38,417		36,152		154,597
Income taxes		13,237		13,239		12,560		11,749		50,785
Net income	$	26,392	$	27,160	$	25,857	$	24,403	$	103,812
Basic earnings per share	$	0.59	$	0.61	$	0.58	$	0.55	$	2.34
Diluted earnings per share	$	0.59	$	0.61	$	0.58	$	0.55	$	2.32

Item 9.  Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

None

Item 9A. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

The Company maintains disclosure controls and procedures, as defined in Rule 13a -15(e) and 15d – 15(e) under the Securities Exchange Act of 1934, as amended, designed to: (i) record, process, summarize, and report within the time periods specified in the SEC’s rules and forms, and (ii) accumulate and communicate to management, including the principal executive and principal financial officers, as appropriate, to allow timely decisions regarding disclosure. Based on evaluation of the Company’s disclosure controls and procedures, with the participation of the Chief Executive Officer (“CEO”) and the Chief Financial Officer (“CFO”), the CEO and CFO have concluded that, as of the end of the period covered by this Annual Report on Form 10-K, these disclosure controls and procedures were effective as of December 31, 2017.

Management’s Annual Report on Internal Control over Financial Reporting

Management’s annual report on internal control over financial reporting is included under the heading “Report on Internal Control Over Financial Reporting” at Item 8 of this Annual Report on Form 10-K.

Report of the Registered Public Accounting Firm

The report of the Company’s registered public accounting firm is included under the heading “Report of the Independent Registered Public Accounting Firm” at Item 8 of this Annual Report on Form 10-K.

108

Changes in Internal Control over Financial Reporting

The Company continually assesses the adequacy of its internal control over financial reporting and enhances its controls in response to internal control assessments, and internal and external audit and regulatory recommendations.  No change in internal control over financial reporting during the quarter ended December 31, 2017 has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements.  Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate due to changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

Item 9B. Other Information

None

Part III

Item 10.  Directors, Executive Officers and Corporate Governance

The information concerning the Directors of the Company required by this Item 10 is incorporated herein by reference to the sections entitled “Nominees for Director and Directors Continuing in Office” in the Company’s Definitive Proxy Statement for its 2018 Annual Meeting of Shareholders, which will be filed with the SEC on or about March 29, 2018 (the “Proxy Statement”).  The information concerning executive officers of the Company required by this Item 10 is presented in Item 4A of this Annual Report on Form 10-K.  Disclosure of compliance with Section 16(a) of the Securities Exchange Act of 1934, as amended, by the Company’s directors and executive officers is incorporated by reference to the section entitled “Section 16(a) Beneficial Ownership Reporting Compliance” in the Proxy Statement.  In addition, information concerning Audit Committee and Audit Committee Financial Expert is included in the Proxy Statement under the caption “Audit Committee Report” and is incorporated herein by reference.

The Company has adopted a code of ethics that applies to its principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions.  The text of the code of ethics is posted on the Company’s website at www.communitybankna.com, and is available free of charge in print to any person who requests it. The Company intends to satisfy the requirements under Item 5.05 of Form 8-K regarding an amendment to, or a waiver from, the code of ethics that relates to certain elements thereof, by posting such information on its website referenced above.

Item 11.  Executive Compensation

The information required by this Item 11 is incorporated herein by reference to the section entitled “Compensation of Executive Officers” in the Company’s Proxy Statement.

Item 12.  Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

The information required by this Item 12 is incorporated herein by reference to the section entitled “Nominees for Director and Directors Continuing in Office” in the Company’s Proxy Statement.

Item 13.  Certain Relationships and Related Transactions and Director Independence

The information required by this Item 13 is incorporated herein by reference to the sections entitled “Corporate Governance” and “Transactions with Related Parties” in the Company’s Proxy Statement.

Item 14.  Principal Accounting Fees and Services

The information required by this Item 14 is incorporated herein by reference to the section entitled “Audit Fees” in the Company’s Proxy Statement.

109

Part IV

Item 15.  Exhibits, Financial Statement Schedules

(a)  Documents filed as part of this report

(1)   All financial statements.  The following consolidated financial statements of Community Bank System, Inc. and subsidiaries are included in Item 8:

‑ Consolidated Statements of Condition, December 31, 2017 and 2016

‑ Consolidated Statements of Income, Years ended December 31, 2017, 2016, and 2015

- Consolidated Statements of Comprehensive Income, Years ended December 31, 2017, 2016, and 2015

‑ Consolidated Statements of Changes in Shareholders' Equity, Years ended December 31, 2017, 2016, and 2015

‑ Consolidated Statement of Cash Flows, Years ended December 31, 2017, 2016, and 2015

‑ Notes to Consolidated Financial Statements, December 31, 2017

‑ Report of Independent Registered Public Accounting Firm

‑ Quarterly selected data, Years ended December 31, 2017 and 2016 (unaudited)

(2)    Financial statement schedules.  Schedules are omitted since the required information is either not applicable or shown elsewhere in the financial statements.

(3)    Exhibits.  The exhibits filed as part of this report and exhibits incorporated herein by reference to other documents are listed below:

2.1	Assignment, Purchase and Assumption Agreement, dated as of January 19, 2012, by and among Community Bank, N.A. and First Niagara Bank, N.A.  Incorporated by reference to Exhibit 2.1 to the Current Report on Form 8-K filed on January 20, 2012 (Registration No. 001-13695).
2.2	Purchase and Assumption Agreement, dated as of January 19, 2012, by and among Community Bank, N.A. and First Niagara Bank, N.A.  Incorporated by reference to Exhibit 2.2 to the Current Report on Form 8-K filed on January 20, 2012 (Registration No. 001-13695).
2.3	Assignment, Purchase and Assumption Agreement, dated as of January 19, 2012, by and between Community Bank, N.A. and First Niagara Bank, N.A., as amended as restated as of July 19, 2012.   Incorporated by reference to Exhibit No. 99.1 to the Current Report on Form 8-K filed on July 24, 2012 (Registration No. 001-13695).
2.4	Amendment No. 1 to Purchase and Assumption Agreement, dated as of September 6, 2012, by and among Community Bank, N.A. and First Niagara Bank, N.A. Incorporated by reference to Exhibit 99.1 to the Current Report on Form 8-K filed on September 13, 2012 (Registration No. 001-13695).
2.5	Purchase and Assumption Agreement, dated as of July 23, 2013, by and between Community Bank, N.A. and Bank of America, N.A.  Incorporated by reference to Exhibit No. 2.1 to the Current Report on Form 8-K filed on July 26, 2013 (Registration No. 001-13695).
2.6	Agreement and Plan of Merger, dated as of February 24, 2015, by and between Community Bank System, Inc. and Oneida Financial Corp.  Incorporated by reference to Exhibit 2.1 to the Current Report on Form 8-K filed on February 25, 2015 (Registration No. 001-13695).

110

2.7	Agreement and Plan of Merger, dated as of October 22, 2016, by and between Community Bank System, Inc. and Merchants Bancshares, Inc.  Incorporated by reference to Exhibit 2.1 to the Current Report on Form 8-K filed on October 27, 2016 (Registration No. 001-13695).
2.8	Agreement and Plan of Merger, dated as of December 2, 2016, by and among Community Bank System, Inc., Northeast Retirement Services, Inc., Cohiba Merger Sub, LLC and Shareholder Representative Services LLC.  Incorporated by reference to Exhibit 2.1 to the Current Report on Form 8-K filed on December 8, 2016 (Registration No. 001-13695).
3.1	Certificate of Incorporation of Community Bank System, Inc., as amended.  Incorporated by reference to Exhibit No. 3.1 to the Registration Statement on Form S-4 filed on October 20, 2000 (Registration No. 333-48374).
3.2	Certificate of Amendment of Certificate of Incorporation of Community Bank System, Inc. Incorporated by reference to Exhibit No. 3.1 to the Quarterly Report on Form 10-Q filed on May 7, 2004 (Registration No. 001-13695).
3.3	Certificate of Amendment of Certificate of Incorporation of Community Bank System, Inc. Incorporated by reference to Exhibit No. 3.1 to the Quarterly Report on Form 10-Q filed on August 9, 2013 (Registration No. 001-13695).
3.4	Bylaws of Community Bank System, Inc., amended July 18, 2007.  Incorporated by reference to Exhibit 3.2 to the Current Report on Form 8-K filed on July 24, 2007 (Registration No. 001-13695).
4.1	Form of Common Stock Certificate.  Incorporated by reference to Exhibit No. 4.1 to the Amendment No. 1 to the Registration Statement on Form S-3 filed on September 29, 2008 (Registration No. 333-153403).
4.2	Registration Rights Agreement, dated February 3, 2017, by and among Community Bank System, Inc. and the individuals and entities set forth on Schedule 1 thereto.  Incorporated by reference to Exhibit No. 10.1 to the Registration Statement on Form S-3 filed on February 3, 2017 (Registration No. 333-215894).
4.3	Form of Replacement Organizers’ Warrant to purchase Community Bank System, Inc. Common Stock.  Incorporated by reference to Exhibit No. 4.1 to the Current Report on Form 8-K filed on May 18, 2017 (Registration No. 001-13695). (2)
4.4	First Supplemental Indenture, dated as of May 12, 2017, by and among Wilmington Trust Company, Community Bank System, Inc., and Merchants Bancshares, Inc.  Incorporated by reference to Exhibit No. 4.2 to the Current Report on Form 8-K filed on May 18, 2017 (Registration No. 001-13695). (2)
10.1	Indenture, dated as of December 8, 2006, between Community Bank System, Inc. and Wilmington Trust Company, as trustee.  Incorporated by reference to Exhibit No. 4.1 to the Current Report on Form 8-K filed on December 12, 2006 (Registration No. 001-13695).
10.2	Amended and Restated Declaration of Trust, dated as of December 8, 2006, among Community Bank System, Inc., as sponsor, Wilmington Trust Company, as Delaware trustee, Wilmington Trust Company, as institutional trustee, and Mark E. Tryniski, Scott A. Kingsley, and Joseph J. Lemchak as administrators.  Incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed on December 12, 2006 (Registration No. 001-13695).
10.3	Guarantee Agreement, dated as of December 8, 2006, between Community Bank System, Inc., as guarantor, and Wilmington Trust Company, as guarantee trustee.  Incorporated by reference to Exhibit 10.2 to the Form 8-K filed on December 12, 2006 (Registration No. 001-13695).
10.4	Employment Agreement, dated as of January 5, 2018, by and between Community Bank System, Inc., Community Bank, N.A., and Mark E. Tryniski.  Incorporated by reference to Exhibit No. 10.1 to the Current Report on Form 8-K filed on January 5, 2018 (Registration No. 001-13695).(2)

111

10.5	Supplemental Retirement Plan Agreement, effective as of December 31, 2008, by and among Community Bank, N.A., Community Bank System, Inc., and Mark E. Tryniski.  Incorporated by reference to Exhibit No. 10.2 to the Current Report on Form 8-K filed on March 19, 2009 (Registration No. 001-13695).(2)
10.6	Amendment to Supplemental Retirement Plan Agreement, dated January 5, 2018, by and among Community Bank System, Inc., Community Bank, N.A. and Mark E. Tryniski.  Incorporated by reference to Exhibit No. 10.2 to the Current Report on Form 8-K filed on January 5, 2018 (Registration No. 001-13695).(2)
10.7	Employment Agreement, dated as of January1, 2017, by and among Community Bank System, Inc., Community Bank N.A., and Scott Kingsley.  Incorporated by reference to Exhibit No. 10.1 to the Current Report on Form 8-K filed on January 6, 2017 (Registration No. 001-13695).(2)
10.8	Supplemental Retirement Plan Agreement, effective September 29, 2009, by and between Community Bank System Inc., Community Bank, N.A., and Scott Kingsley.  Incorporated by reference to Exhibit No. 10.1 to the Current Report on Form 8-K filed on October 1, 2009 (Registration No. 001-13695).(2)
10.9	Employment Agreement, dated as of March 11, 2016, by and between Community Bank System, Inc., Community Bank N.A., and Brian D. Donahue.  Incorporated by reference to Exhibit No. 10.1 to the Current Report on Form 8-K filed on March 16, 2016 (Registration No. 001-13695).(2)
10.10	Supplemental Retirement Plan Agreement, dated as of October 18, 2013, by and between Community Bank System Inc., Community Bank, N.A., and Brian D. Donahue.  Incorporated by reference to Exhibit No. 10.2 to the Current Report on Form 8-K filed on October 23, 2013 (Registration No. 001-13695).(2)
10.11	Employment Agreement, dated as of January1, 2017, by and among Community Bank System, Inc., Community Bank N.A., and George J. Getman.   Incorporated by reference to Exhibit No. 10.2 to the Current Report on Form 8-K filed on January 6, 2017 (Registration No. 001-13695).(2)
10.12	Supplemental Retirement Plan Agreement, dated as of October 18, 2013, by and among Community Bank System, Inc., Community Bank, N.A., and George J. Getman.  Incorporated by reference to Exhibit 10.3 to the Current Report on Form 8-K filed on October 23, 2013 (Registration No. 001-13695).(2)
10.13	Employment Agreement, dated as of March 11, 2016, by and among Community Bank System, Inc., Community Bank N.A., and Joseph F. Serbun.   Incorporated by reference to Exhibit No. 10.2 to the Current Report on Form 8-K filed on March 16, 2016 (Registration No. 001-13695).(2)
10.14	Pre-2005 Supplemental Retirement Agreement, effective December 31, 2004, by and between Community Bank System, Inc., Community Bank, N.A., and Sanford Belden.  Incorporated by reference to Exhibit No. 10.3 to the Annual Report on Form 10-K filed on March 15, 2005 (Registration No. 001-13695).(2)
10.15	Post-2004 Supplemental Retirement Agreement, effective January 1, 2005, by and between Community Bank System, Inc., Community Bank, N.A., and Sanford Belden.  Incorporated by reference to Exhibit No. 10.2 to the Annual Report on Form 10-K filed on March 15, 2005 (Registration No. 001-13695).(2)
10.16	Supplemental Retirement Plan Agreement, effective March 26, 2003, by and between Community Bank System Inc. and Thomas McCullough.  Incorporated by reference to Exhibit No. 10.11 to the Annual Report on Form 10-K filed on March 12, 2004 (Registration No. 001-13695).(2)
10.17	2004 Long-Term Incentive Compensation Program, as amended.  Incorporated by reference to Exhibit No. 99.1 to the Registration Statement on Form S-8 filed on December 19, 2012 (Registration No. 001-13695).(2)
10.18	2014 Long-Term Incentive Plan, as amended.  Incorporated by reference to Exhibit No. 10.1 to the Current Report on Form 8-K filed on May 2, 2017 (Registration No. 001-13695).(2)

112

10.19	Stock Balance Plan for Directors, as amended.  Incorporated by reference to Annex I to the Definitive Proxy Statement on Schedule 14A filed on March 31, 1998 (Registration No. 001-13695).(2)
10.20	Community Bank System, Inc. Deferred Compensation Plan for Directors.  Incorporated by reference to Exhibit No. 99.1 to the Registration Statement on Form S-8 filed on June 30, 2017 (Registration No. 333-219098). (2)
10.21	Community Bank System, Inc. Pension Plan Amended and Restated as of January 1, 2004.  Incorporated by reference to Exhibit No. 10.27 to the Annual Report on Form 10-K filed on March 15, 2005 (Registration No. 001-13695).(2)
10.22	Amendment #1 to the Community Bank System, Inc. Pension Plan, as amended and restated as of January 1, 2004 (“Plan”).  Incorporated by reference to Exhibit No. 10.27 to the Annual Report on Form 10-K filed on March 15, 2005 (Registration No. 001-13695).(2)
10.23	Community Bank System, Inc. 401(k) Employee Stock Ownership Plan, dated as of December 20, 2011.  Incorporated by reference to Exhibit 4.5 to the Registration Statement on Form S-8 filed on December 20, 2013 (Registration No. 001-13695).(2)
10.24	Merchants Bancshares, Inc. and Subsidiaries Amended and Restated 1996 Compensation Plan for Non-Employee Directors. Incorporated by reference to Exhibit 10.3 to Merchants Bancshares, Inc.’s Annual Report on Form 10-K filed with the Commission on March 15, 2011. (2)
10.25	Merchants Bancshares, Inc. and Subsidiaries Amended and Restated 2008 Compensation Plan for Non-Employee Directors and Trustees. Incorporated by reference to Exhibit 10.4 to Merchants Bancshares, Inc.’s Annual Report on Form 10-K filed with the Commission on March 15, 2011. (2)
10.26	Merchants Bank Amended and Restated Deferred Compensation Plan for Directors.  Incorporated by reference to Exhibit 10.7 to Merchants Bancshares, Inc.’s Annual Report on Form 10-K filed with the Commission on March 15, 2011. (2)
10.27	Merchants Bank Salary Continuation Plan.  Incorporated by reference to Exhibit 10.9 to Merchants Bancshares, Inc.’s Annual Report on Form 10-K filed with the Commission on March 15, 2011. (2)
21.1	Subsidiaries of Registrant.(1)
23.1	Consent of PricewaterhouseCoopers LLP.(1)
31.1	Certification of Mark E. Tryniski, President and Chief Executive Officer of the Registrant, pursuant to Rule 13a-15(e) or Rule 15d-15(e) under the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.(1)
31.2	Certification of Scott Kingsley, Treasurer and Chief Financial Officer of the Registrant, pursuant to Rule 13a-15(e) or Rule 15d-15(e) under the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.(1)
32.1	Certification of Mark E. Tryniski, President and Chief Executive Officer of the Registrant, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.(3)

113

32.2

Certification of Scott Kingsley, Treasurer and Chief Financial Officer of the Registrant, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.(3)

101

Interactive data files pursuant to Rule 405 of Regulation S-T: (i) the Consolidated Statements of Condition, (ii) the Consolidated Statements of Income, (iii) the Consolidated Statements of Comprehensive Income, (iv) the Consolidated Statements of Changes in Stockholders’ Equity, (v) the Consolidated Statements of Cash Flows, and (vi) the Notes to Consolidated Financial Statements tagged as blocks of text and in detail.(4)

(1) Filed herewith.

(2) Denotes management contract or compensatory plan or arrangement.

(3) Furnished herewith.

(4) XBRL (Extensible Business Reporting Language) information is furnished and not filed or a part of a registration statement or prospectus for purposes of sections 11 or 12 of the Securities Act of 1933, is deemed not filed for purposes of section 18 of the Securities Exchange Act of 1934, and otherwise is not subject to liability under these sections.

B. Not applicable

C. Not applicable.

Item 16. Form 10-K Summary

None

114

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

COMMUNITY BANK SYSTEM, INC.

By:

/s/ Mark E. Tryniski

Mark E. Tryniski

President and Chief Executive Officer

March 1, 2018

Pursuant to the requirements of the Securities and Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities indicated on the 1^st day of March 2018.

By:

/s/ Mark E. Tryniski

Mark E. Tryniski

President, Chief Executive Officer and Director

(Principal Executive Officer)

By:

/s/ Scott Kingsley

Scott Kingsley

Treasurer and Chief Financial Officer

(Principal Financial Officer and Principal Accounting Officer)

Directors:

/s/ Brian R. Ace	/s/ Raymond C. Pecor, III
Brian R. Ace, Director	Raymond C. Pecor, III, Director
/s/ Mark J. Bolus	/s/ Sally A. Steele
Mark J. Bolus, Director	Sally A. Steele, Director and Chair of the Board of Directors
/ s/ Jeffrey L. Davis	/s/ Eric E. Stickels
Jeffrey L. Davis, Director	Eric E. Stickels, Director
/s/ Neil E. Fesette	/s/ John F. Whipple, Jr.
Neil E. Fesette, Director	John F. Whipple Jr., Director
/s/ Michael R. Kallet
Michael R. Kallet, Director
/s/ John Parente
John Parente, Director

115

EX-21.1

Exhibit 21.1

Subsidiaries of Registrant

As of December 31, 2017

Name	Jurisdiction of Incorporation
Benefit Plans Administrative Services, Inc.	New York
Benefit Plans Administrative Services, LLC	New York
BPAS Actuarial and Pension Services, LLC	New York
BPAS Trust Company of Puerto Rico	Puerto Rico
Brilie Corporation	New York
CBNA Preferred Funding Corp.	Delaware
CBNA Treasury Management Corporation	New York
CFSI Close-Out Corp.	New York
Community Bank, N.A.	Federally Chartered
Community Capital Trust IV	Delaware
Community Investment Services, Inc.	New York
Community Statutory Trust III	Connecticut
First of Jermyn Realty Company, Inc.	Pennsylvania
Global Trust Company, Inc.	Maine
Gordon B. Roberts Agency, LLC	New York
Hand Benefits & Trust Company	Texas
Hand Securities, Inc.	Texas
MBVT Statutory Trust I	Delaware
McMahon, Fenaroli & White, Inc.	New York
Northeast Retirement Services, LLC	Delaware
NOTCH Investment Fund, LLC	Vermont
Nottingham Advisors, Inc.	Delaware
OneGroup NY, Inc.	New York
Oneida Preferred Funding II, LLC	New York
The Carta Group, Inc.	New York
Town & Country Agency LLC	New York
Western Catskill Realty, LLC	New York
Workplace Health Solutions Inc.	New York

EX-23.1

 Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements on Form S-3 (No. 333-215894) and Form S-8 (Nos. 333-61916, 333-61672, 333-17011, 333-16635, 033-60607, 333-119887, 333-119590,  333-185556, 333-192994, 333-196866, 333-210240, 333-219098, and 333-221190) of Community Bank System, Inc. of our report dated March 1, 2018 relating to the financial statements and the effectiveness of internal control over financial reporting, which appears in this Form 10-K.

/s/PricewaterhouseCoopers LLP

Buffalo, New York

March 1, 2018

EX-31.1

Exhibit 31.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Mark E. Tryniski, certify that:

1. I have reviewed this annual report on Form 10-K of Community Bank System, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date:  March 1, 2018

/s/ Mark E. Tryniski

Mark E. Tryniski,

President, Chief Executive Officer and Director

EX-31.2

Exhibit 31.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Scott Kingsley, certify that:

1. I have reviewed this annual report on Form 10-K of Community Bank System, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date:  March 1, 2018

/s/ Scott Kingsley

Scott Kingsley,

Treasurer and Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Community Bank System, Inc. (the "Company") on Form 10-K for the year ended December 31, 2017 as filed with the Securities and Exchange Commission on the date hereof  (the "Report"), I, Mark E. Tryniski, President and Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:

(1) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Mark E. Tryniski

Mark E. Tryniski

President, Chief Executive Officer and Director

March 1, 2018

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Community Bank System, Inc. (the "Company") on Form 10-K for the year ended December 31, 2017 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, Scott Kingsley, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:

(1) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Scott Kingsley

Scott Kingsley,

Treasurer and Chief Financial Officer

March 1, 2018

XML

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2017	Jan. 31, 2018	Jun. 30, 2017
Document and Entity Information [Abstract]
Entity Registrant Name	COMMUNITY BANK SYSTEM, INC.
Entity Central Index Key	0000723188
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$ 2,750,913,268
Entity Common Stock, Shares Outstanding		50,796,090
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	FY
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2017

XML

CONSOLIDATED STATEMENTS OF CONDITION - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Assets:
Cash and cash equivalents	$ 221,038	$ 173,857
Available-for-sale investment securities (cost of $3,007,148 and $2,706,863, respectively)	3,031,088	2,748,656
Other securities, at cost	50,291	35,736
Loans held for sale, at fair value	461	2,416
Loans	6,256,757	4,948,562
Allowance for loan losses	(47,583)	(47,233)
Net loans	6,209,174	4,901,329
Goodwill	734,430	465,142
Core deposit intangibles, net	25,025	7,107
Other intangibles, net	65,633	8,595
Intangible assets, net	825,088	480,844
Premises and equipment, net	123,393	112,318
Accrued interest and fees receivable	36,177	31,093
Other assets	249,488	180,188
Total assets	10,746,198	8,666,437
Liabilities:
Noninterest-bearing deposits	2,293,057	1,646,039
Interest-bearing deposits	6,151,363	5,429,915
Total deposits	8,444,420	7,075,954
Short-term borrowings	24,000	146,200
Securities sold under agreement to repurchase, short-term	337,011	0
Other long-term debt	2,071	0
Subordinated debt held by unconsolidated subsidiary trusts	122,814	102,170
Accrued interest and other liabilities	180,567	144,013
Total liabilities	9,110,883	7,468,337
Commitments and contingencies (See Note N)
Shareholders' equity:
Preferred stock, $1.00 par value, 500,000 shares authorized, 0 shares issued	0	0
Common stock, $1.00 par value, 75,000,000 shares authorized; 51,263,841 and 44,950,352 shares issued, respectively	51,264	44,950
Additional paid-in capital	894,879	545,775
Retained earnings	700,557	614,692
Accumulated other comprehensive (loss)/income	(3,699)	7,843
Treasury stock, at cost (567,764 shares including 237,494 shares held by deferred compensation arrangements at December 31, 2017, and 512,937 shares at December 31, 2016)	(21,014)	(15,160)
Deferred compensation arrangements (237,494 shares at December 31, 2017)	13,328	0
Total shareholders' equity	1,635,315	1,198,100
Total liabilities and shareholders' equity	$ 10,746,198	$ 8,666,437

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CONSOLIDATED STATEMENTS OF CONDITION (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Assets:
Available-for-sale investment securities, cost	$ 3,007,148	$ 2,706,863
Shareholders' equity:
Preferred stock, par value (in dollars per share)	$ 1.00	$ 1.00
Preferred stock, shares authorized (in shares)	500,000	500,000
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 1.00	$ 1.00
Common stock, shares authorized (in shares)	75,000,000	75,000,000
Common stock, shares issued (in shares)	51,263,841	44,950,352
Treasury stock, at cost (in shares)	567,764	512,937
Shares held by deferred compensation arrangements (in shares)	237,494

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CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Interest income:
Interest and fees on loans	$ 253,949	$ 211,467	$ 187,743
Interest and dividends on taxable investments	60,159	56,201	52,871
Interest and dividends on nontaxable investments	15,347	17,519	19,008
Total interest income	329,455	285,187	259,622
Interest expense:
Interest on deposits	8,031	7,325	6,971
Interest on borrowings	1,845	1,017	1,694
Interest on subordinated debt held by unconsolidated subsidiary trusts	3,904	2,949	2,537
Total interest expense	13,780	11,291	11,202
Net interest income	315,675	273,896	248,420
Provision for loan losses	10,984	8,076	6,447
Net interest income after provision for loan losses	304,691	265,820	241,973
Noninterest revenues:
Deposit service fees	67,896	58,595	52,747
Other banking revenues	5,466	7,477	4,960
Employee benefit services	80,830	46,628	45,388
Insurance services	26,150	23,149	3,352
Wealth management services	22,079	19,776	16,856
Gain/(loss) on sales of investment securities, net	2	0	(4)
Total noninterest revenues	202,423	155,625	123,299
Noninterest expenses:
Salaries and employee benefits	179,993	151,647	126,356
Occupancy and equipment	35,561	30,078	27,593
Data processing and communications	37,579	34,501	30,430
Amortization of intangible assets	16,941	5,479	3,663
Legal and professional fees	11,576	8,455	6,813
Office supplies and postage	7,506	7,274	6,476
Business development and marketing	9,994	7,484	7,204
FDIC insurance premiums	3,473	3,671	3,962
Acquisition expenses	25,986	1,706	7,037
Other expenses	18,540	16,553	13,521
Total noninterest expenses	347,149	266,848	233,055
Income before income taxes	159,965	154,597	132,217
Income taxes	9,248	50,785	40,987
Net income	$ 150,717	$ 103,812	$ 91,230
Basic earnings per share (in dollars per share)	$ 3.07	$ 2.34	$ 2.21
Diluted earnings per share (in dollars per share)	3.03	2.32	2.19
Cash dividends declared per share (in dollars per share)	$ 1.32	$ 1.26	$ 1.22

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Pension and other post retirement obligations:
Amortization of actuarial (gains)/losses included in net periodic pension cost, gross	$ (707)	$ 5,514	$ (7,236)
Tax effect	263	(2,108)	2,774
Amortization of actuarial (gains)/losses included in net periodic pension cost, net	(444)	3,406	(4,462)
Amortization of prior service cost included in net periodic pension cost, gross	(859)	(136)	(170)
Tax effect	324	52	65
Amortization of prior service cost included in net periodic pension cost, net	(535)	(84)	(105)
Unamortized actuarial gain due to plan merger, gross	1,858	0	0
Tax effect	(711)	0	0
Unamortized actuarial gain due to plan merger, net	1,147	0	0
Other comprehensive income/(loss) related to pension and other post retirement obligations, net of taxes	168	3,322	(4,567)
Unrealized (losses)/gains on securities:
Net unrealized holding losses arising during period, gross	(17,851)	(24,042)	(9,209)
Tax effect	6,787	9,328	2,289
Net unrealized holding losses arising during period, net	(11,064)	(14,714)	(6,920)
Reclassification adjustment for net (gains)/losses included in net income, gross	(2)	0	4
Tax effect	1	0	(2)
Reclassification adjustment for net gains/losses included in net income, net	(1)	0	2
Other comprehensive (loss) related to unrealized (losses)/gains on available-for-sale securities, net of taxes	(11,065)	(14,714)	(6,918)
Other comprehensive (loss), net of tax	(10,897)	(11,392)	(11,485)
Net income	150,717	103,812	91,230
Comprehensive income	139,820	92,420	79,745
Accumulated Other Comprehensive Income/(Loss) By Component:
Unrealized loss for pension and other postretirement obligations	(28,677)	(28,969)	(34,347)
Tax effect	7,044	11,008	13,064
Net unrealized loss for pension and other postretirement obligations	(21,633)	(17,961)	(21,283)
Unrealized gain on available-for-sale securities	23,940	41,793	65,835
Tax effect	(6,006)	(15,989)	(25,317)
Net unrealized gain on available-for-sale securities	17,934	25,804	40,518
Accumulated other comprehensive (loss)/income	$ (3,699)	$ 7,843	$ 19,235

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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income/(Loss) [Member]	Treasury Stock [Member]	Deferred Compensation Arrangements [Member]	Total
Balance at Dec. 31, 2014	$ 41,606	$ 409,984	$ 525,985	$ 30,720	$ (20,391)	$ 0	$ 987,904
Balance (in shares) at Dec. 31, 2014	40,747,721
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			91,230				91,230
Other comprehensive income (loss), net of tax				(11,485)			(11,485)
Dividends declared:
Common			(50,624)				(50,624)
Common stock issued under employee stock plan	$ 459	9,315					9,774
Common stock issued under employee stock plan (in shares)	458,817
Stock-based compensation		4,201					4,201
Stock issued for acquisitions	$ 2,378	99,824					102,202
Stock issued for acquisitions (in shares)	2,377,329
Treasury stock purchased					(9,126)		$ (9,126)
Treasury stock purchased (in shares)	(265,230)						(300,000)
Treasury stock issued to benefit plan		4,691			11,880		$ 16,571
Treasury stock issued to benefit plan (in shares)	456,223
Balance at Dec. 31, 2015	$ 44,443	528,015	566,591	19,235	(17,637)	0	1,140,647
Balance (in shares) at Dec. 31, 2015	43,774,860
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			103,812				103,812
Other comprehensive income (loss), net of tax				(11,392)			(11,392)
Dividends declared:
Common			(55,711)				(55,711)
Common stock issued under employee stock plan	$ 507	10,036					10,543
Common stock issued under employee stock plan (in shares)	507,784
Stock-based compensation		4,783					4,783
Treasury stock purchased					(3,470)		$ (3,470)
Treasury stock purchased (in shares)	(67,826)						0
Treasury stock issued to benefit plan		2,941			5,947		$ 8,888
Treasury stock issued to benefit plan (in shares)	222,597
Balance at Dec. 31, 2016	$ 44,950	545,775	614,692	7,843	(15,160)	0	1,198,100
Balance (in shares) at Dec. 31, 2016	44,437,415
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			150,717				150,717
Other comprehensive income (loss), net of tax				(10,897)			(10,897)
Reclassification related to tax effect of Tax Cuts and Jobs Act			645	(645)			0
Dividends declared:
Common			(65,497)				(65,497)
Common stock issued under employee stock plan	$ 265	4,298					4,563
Common stock issued under employee stock plan (in shares)	264,640
Stock-based compensation		5,137					5,137
Stock issued for acquisitions	$ 6,049	337,083					343,132
Stock issued for acquisitions (in shares)	6,048,849
Deferred compensation arrangements acquired					(10,022)	10,022	0
Deferred compensation arrangements acquired (in shares)	(179,003)
Treasury stock purchased					(3,306)	3,306	$ 0
Treasury stock purchased (in shares)	(58,491)						0
Treasury stock issued to benefit plan		2,586			7,474	0	$ 10,060
Treasury stock issued to benefit plan (in shares)	182,667
Balance at Dec. 31, 2017	$ 51,264	$ 894,879	$ 700,557	$ (3,699)	$ (21,014)	$ 13,328	$ 1,635,315
Balance (in shares) at Dec. 31, 2017	50,696,077

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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash dividends declared:
Dividends declared per common share (in dollars per share)	$ 1.32	$ 1.26	$ 1.22
Common stock issued under employee stock plan, tax benefits		$ 3,091	$ 2,297

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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating activities:
Net income	$ 150,717	$ 103,812	$ 91,230
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	16,024	14,398	13,132
Amortization of intangible assets	16,941	5,479	3,663
Net accretion on securities, loans and borrowings	(6,619)	(4,405)	(3,289)
Stock-based compensation	5,137	4,783	4,201
(Benefit)/provision for loan losses	10,984	8,076	6,447
Provision for deferred income taxes	(28,692)	13,066	10,716
Amortization of mortgage servicing rights	499	518	409
Income from bank-owned life insurance policies	(1,586)	(1,505)	(1,086)
(Gain)/loss on sales of investment securities, net	(2)	0	4
Net loss/(gain) on sale of loans and other assets	181	(837)	(180)
Change in other assets and liabilities	26,090	(7,614)	(5,681)
Net cash provided by operating activities	189,674	135,771	119,566
Investing activities:
Proceeds from sales of available-for-sale investment securities	0	0	221,136
Proceeds from maturities of available-for-sale investment securities	157,278	109,638	169,562
Proceeds from maturities of other securities	30,116	8,703	1,790
Purchases of available-for-sale investment securities	(90,380)	(65,966)	(503,000)
Purchases of other securities	(13,302)	(4,612)	0
Net change in loans	164,846	(159,871)	(176,754)
Cash (paid)/received for acquisition, net of cash acquired of $52,132, $0, and $81,772, respectively	(107,414)	(575)	25,505
Settlement of bank owned life insurance policies	1,779	3,127	0
Purchases of premises and equipment, net	(10,819)	(12,442)	(12,400)
Real estate limited partnership investments	(733)	0	0
Net cash provided by/(used in) investing activities	131,371	(121,998)	(274,161)
Financing activities:
Net change in deposits	(79,940)	202,480	238,969
Net change in borrowings, net of payments of $81,544, $0 and $0	(144,809)	(155,100)	(36,700)
Issuance of common stock	4,563	10,543	9,774
Purchase of treasury stock	(3,306)	(3,470)	(9,126)
Sale of treasury stock	10,060	8,888	16,571
Increase in deferred compensation arrangements	3,306	0	0
Cash dividends paid	(62,305)	(55,048)	(49,273)
Withholding taxes paid on share-based compensation	(1,433)	(1,419)	(806)
Net cash (used in)/provided by financing activities	(273,864)	6,874	169,409
Change in cash and cash equivalents	47,181	20,647	14,814
Cash and cash equivalents at beginning of year	173,857	153,210	138,396
Cash and cash equivalents at end of year	221,038	173,857	153,210
Supplemental disclosures of cash flow information:
Cash paid for interest	13,705	11,268	11,252
Cash paid for income taxes	41,231	32,239	28,891
Supplemental disclosures of noncash financing and investing activities:
Dividends declared and unpaid	17,460	14,268	13,605
Transfers from loans to other real estate	3,518	2,612	3,943
Acquisitions:
Common stock issued	343,132	0	102,202
Fair value of assets acquired, excluding acquired cash and intangibles	1,961,246	0	675,025
Fair value of liabilities assumed	$ 1,871,685	$ 0	$ 700,574

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CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Investing activities:
Cash acquired related to acquisition	$ 52,132	$ 0	$ 81,772
Financing activities:
Payment made on borrowings	$ 81,544	$ 0	$ 0

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

12 Months Ended

Dec. 31, 2017

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

NOTE A: SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Nature of Operations

Community Bank System, Inc. (the “Company”) is a registered financial holding company which wholly-owns two significant consolidated subsidiaries: Community Bank, N.A. (the “Bank” or “CBNA”), and Benefit Plans Administrative Services, Inc. (“BPAS”).  As of December 31, 2017, BPAS owns five subsidiaries:  Benefit Plans Administrative Services, LLC (“BPA”), a provider of defined benefit contribution plan administration services; Northeast Retirement Services, LLC (“NRS”), a provider of institutional transfer agency, master recordkeeping services, fund administration, trust and retirement plan services; BPAS Actuarial & Pension Services, LLC (“BPAS-APS”), a provider of actuarial and benefit consulting services; BPAS Trust Company of Puerto Rico, a Puerto Rican trust company; and Hand Benefits & Trust Company (“HB&T”), a provider of collective investment fund administration and institutional trust services.  NRS owns one subsidiary, Global Trust Company, Inc. (“GTC”), a non-depository trust company which provides fiduciary services for collective investment trusts and other products.  HB&T owns one subsidiary, Hand Securities Inc. (“HSI”), an introducing broker-dealer.  The Company also wholly-owns three unconsolidated subsidiary business trusts formed for the purpose of issuing mandatorily-redeemable preferred securities which are considered Tier I capital under regulatory capital adequacy guidelines (see Note P).

As of December 31, 2017, the Bank operated 225 full service branches operating as Community Bank, N.A. throughout 35 counties of Upstate New York, six counties of Northeastern Pennsylvania, 12 counties of Vermont and one county of Western Massachusetts, offering a range of commercial and retail banking services.  The Bank owns the following operating subsidiaries:  The Carta Group, Inc. (“Carta Group”), CBNA Preferred Funding Corporation (“PFC”), CBNA Treasury Management Corporation (“TMC”), Community Investment Services, Inc. (“CISI”), NOTCH Investment Fund, LLC (“NOTCH”), Nottingham Advisors, Inc. (“Nottingham”), OneGroup NY, Inc. (“OneGroup”), and Oneida Preferred Funding II LLC (“OPFC II”).  OneGroup is a full-service insurance agency offering personal and commercial property insurance and other risk management products and services.  NOTCH, PFC and OPFC II primarily act as investors in residential and commercial real estate activities.  TMC provides cash management, investment, and treasury services to the Bank.  CISI and Carta Group provide broker-dealer and investment advisory services.  Nottingham provides asset management services to individuals, corporations, corporate pension and profit sharing plans, and foundations.

Principles of Consolidation

The consolidated financial statements include the accounts of the Company and its subsidiaries.  All intercompany accounts and transactions have been eliminated in consolidation.

Variable Interest Entities (“VIE”) are legal entities in which equity investors do not have the characteristics of a controlling financial interest or do not have sufficient equity at risk for the legal entities to finance its activities without additional subordinated financial support.  VIEs may be required to be consolidated by a company if it is determined the company is the primary beneficiary of a VIE.  The primary beneficiary of a VIE is the enterprise that has: (1) the power to direct the activities of the VIE that most significantly impact the VIE’s economic performance, and (2) the obligation to absorb losses of the VIE that could potentially be significant to the VIE or the right to receive benefits of the VIE that could potentially be significant to the VIE.  The Company’s VIE’s are described in more detail in Note T to the consolidated financial statements.

Critical Accounting Estimates in the Preparation of Financial Statements

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period.  Actual results could differ from those estimates.  Critical accounting estimates include the allowance for loan losses, actuarial assumptions associated with the pension, post-retirement and other employee benefit plans, the provision for income taxes, investment valuation and other-than-temporary impairment, the carrying value of goodwill and other intangible assets, and acquired loan valuations.

Risk and Uncertainties

In the normal course of its business, the Company encounters economic and regulatory risks.  There are three main components of economic risk: interest rate risk, credit risk and market risk.  The Company is subject to interest rate risk to the degree that its interest-bearing liabilities mature or reprice at different speeds, or on different basis, from its interest-earning assets.  The Company’s primary credit risk is the risk of default on the Company’s loan portfolio that results from the borrowers’ inability or unwillingness to make contractually required payments.  Market risk reflects potential changes in the value of collateral underlying loans, the fair value of investment securities, and loans held for sale.

The Company is subject to regulations of various governmental agencies.  These regulations can change significantly from period to period.  The Company also undergoes periodic examinations by the regulatory agencies which may subject it to further changes with respect to asset valuations, amounts of required loan loss allowances, and operating restrictions resulting from the regulators’ judgments based on information available to them at the time of their examinations.

Revenue Recognition

The Company recognizes income on an accrual basis. CISI and Carta Group recognize fee income when investment and insurance products are sold to customers.  Nottingham provides asset management services to brokerage firms and clients and recognizes income ratably over the contract period during which service is performed.  Revenue from BPA’s administration and recordkeeping services is recognized ratably over the service contract period.  Revenue from consulting and actuarial services is recognized when services are rendered.  OneGroup recognizes commission revenue at the later of the effective date of the insurance policy, or the date on which the policy premium is billed to the customer.  At that date, the earnings process has been completed and the impact of refunds for policy cancellations can be reasonably estimated to establish reserves. The reserve for policy cancellations is based upon historical cancellation experience adjusted for known circumstances. All intercompany revenue and expense among related entities are eliminated in consolidation.

Cash and Cash Equivalents

For purposes of reporting cash flows, cash and cash equivalents include cash on hand, amounts due from banks, and highly liquid investments with original maturities of less than 90 days.  The carrying amounts reported in the consolidated statements of condition for cash and cash equivalents approximate those assets’ fair values.

Investment Securities

The Company can classify its investments in debt and equity securities as trading, held-to-maturity, or available-for-sale.  Held-to-maturity securities are those for which the Company has the positive intent and ability to hold until maturity, and are reported at amortized cost.  The Company did not use the held-to-maturity classification in 2016 or 2017.  Securities classified as available-for-sale are reported at fair value with net unrealized gains and losses reflected as a separate component of shareholders' equity, net of applicable income taxes.  None of the Company's investment securities have been classified as trading securities at December 31, 2017.  Certain equity securities are stated at cost and include restricted stock of the Federal Reserve Bank of New York (“Federal Reserve”) and the Federal Home Loan Bank of New York and the Federal Home Loan Bank of Boston (collectively referred to as “FHLB”).

Fair values for investment securities are based upon quoted market prices, where available.  If quoted market prices are not available, fair values are based upon quoted market prices of comparable instruments, or a discounted cash flow model using market estimates of interest rates and volatility.

The Company conducts an assessment of all securities in an unrealized lossposition to determine if other-than-temporary impairment (“OTTI”) exists on a quarterly basis. An unrealized loss exists when the current fair value of an individual security is less than its amortized cost basis.  The OTTI assessment considers the security structure, recent security collateral performance metrics, if applicable, external credit ratings, failure of the issuer to make scheduled interest or principal payments, judgment about and expectations of future performance, and relevant independent industry research, analysis, and forecasts. The severity of the impairment and the length of time the security has been impaired is also considered in the assessment.  The assessment of whether an OTTI decline exists is performed on each security, regardless of the classification of the security as available-for-sale or held-to-maturity, and involves a high degree of subjectivity and judgment that is based on the information available to management at a point in time.

An OTTI loss must be recognized for a debt security in an unrealized loss position if there is intent to sell the security or it is more likely than not the Company will be required to sell the security prior to recovery of its amortized cost basis. In this situation, the amount of loss recognized in income is equal to the difference between the fair value and the amortized cost basis of the security. Even if management does not have the intent, and it is not more likely than not that the Company will be required to sell the securities, an evaluation of the expected cash flows to be received is performed to determine if a credit loss has occurred. For debt securities, a critical component of the evaluation for OTTI is the identification of credit-impaired securities, where the Company does not expect to receive cash flows sufficient to recover the entire amortized cost basis of the security.  In the event of a credit loss, only the amount of impairment associated with the credit loss would be recognized in income. The portion of the unrealized loss relating to other factors, such as liquidity conditions in the market or changes in market interest rates, is recorded in accumulated other comprehensive loss.

Equity securities are also evaluated to determine whether the unrealized loss is expected to be recoverable based on whether evidence exists to support a realizable value equal to or greater than the amortized cost basis. If it is probable that the amortized cost basis will not be recovered, taking into consideration the estimated recovery period and the ability to hold the equity security until recovery, OTTI is recognized in earnings equal to the difference between the fair value and the amortized cost basis of the security.

The specific identification method is used in determining the realized gains and losses on sales of investment securities and OTTI charges.  Premiums and discounts on securities are amortized and accreted, respectively, on the interest method basis over the period to maturity or estimated life of the related security.  Purchases and sales of securities are recognized on a trade date basis.

Loans

Loans are stated at unpaid principal balances, net of unearned income.  Mortgage loans held for sale are carried at fair value and are included in loans held for sale on the consolidated statements of condition.  Fair values for variable rate loans that reprice frequently are based on carrying values.  Fair values for fixed rate loans are estimated using discounted cash flows and interest rates currently being offered for loans with similar terms to borrowers of similar credit quality.  The carrying amount of accrued interest approximates its fair value.

Interest on loans is accrued and credited to operations based upon the principal amount outstanding.  Nonrefundable loan fees and related direct costs are deferred and included in the loan balances where they are amortized over the life of the loan as an adjustment to loan yield using the effective yield method.  Premiums and discounts on purchased loans are amortized using the effective yield method over the life of the loans.

Acquired loans

Acquired loans are initially recorded at their acquisition date fair values.  The carryover of allowance for loan losses is prohibited as any credit losses in the loans are included in the determination of the fair value of the loans at the acquisition date. Fair values for acquired loans are based on a discounted cash flow methodology that involves assumptions and judgments as to credit risk, prepayment risk, liquidity risk, default rates, loss severity, payment speeds, collateral values and discount rate.

Acquired impaired loans

Acquired loans that have evidence of deterioration in credit quality since origination and for which it is probable, at acquisition, that the Company will be unable to collect all contractually required payments are accounted for as impaired loans under ASC 310-30.  The excess of undiscounted cash flows expected at acquisition over the estimated fair value is referred to as the accretable discount and is recognized into interest income over the remaining life of the loans using the interest method. The difference between contractually required payments at acquisition and the undiscounted cash flows expected to be collected at acquisition is referred to as the non-accretable discount. The non-accretable discount represents estimated future credit losses and other contractually required payments that the Company does not expect to collect. Subsequent decreases in expected cash flows are recognized as impairments through a charge to the provision for loan losses resulting in an increase in the allowance for loan losses. Subsequent improvements in expected cash flows result in a recovery of previously recorded allowance for loan losses or a reversal of a corresponding amount of the non-accretable discount, which the Company then reclassifies as an accretable discount that is recognized into interest income over the remaining life of the loans using the interest method.

Acquired loans that met the criteria for non-accrual of interest prior to acquisition may be considered performing upon acquisition, regardless of whether the customer is contractually delinquent, if the Company can reasonably estimate the timing and amount of the expected cash flows on such loans and if the Company expects to fully collect the new carrying value of the loans. As such, the Company may no longer consider the loan to be non-accrual or non-performing and may accrue interest on these loans, including the impact of any accretable discount.

Acquired non-impaired loans

Acquired loans that do not meet the requirements under ASC 310-30 are considered acquired non-impaired loans. The difference between the acquisition date fair value and the outstanding balance represents the fair value adjustment for a loan and includes both credit and interest rate considerations. Fair value adjustments may be discounts (or premiums) to a loan’s cost basis and are accreted (or amortized) to net interest income (or expense) over the loan’s remaining life in accordance with ASC 310-20. Fair value adjustments for revolving loans are accreted (or amortized) using a straight line method. Term loans are accreted (or amortized) using the constant effective yield method.

Subsequent to the purchase date, the methods used to estimate the allowance for loan losses for the acquired non-impaired loans is consistent with the policy described below.  However, the Company compares the net realizable value of the loans to the carrying value, for loans collectively evaluated for impairment.  The carrying value represents the net of the loan’s unpaid principal balance and the remaining purchase discount (or premium) that has yet to be accreted (or amortized) into interest income (or interest expense).  When the carrying value exceeds the net realizable value, an allowance for loan losses is recognized.

Impaired and Other Nonaccrual Loans

The Company places a loan on nonaccrual status when the loan becomes 90 days past due (or sooner, if management concludes collection is doubtful), except when, in the opinion of management, it is well-collateralized and in the process of collection. A loan may be placed on nonaccrual status earlier than ninety days past due if there is deterioration in the financial position of the borrower or if other conditions of the loan so warrant. When a loan is placed on nonaccrual status, uncollected accrued interest is reversed against interest income and the amortization of nonrefundable loan fees and related direct costs is discontinued. Interest income during the period the loan is on nonaccrual status is recorded on a cash basis after recovery of principal is reasonably assured. Nonaccrual loans are returned to accrual status when management determines that the borrower’s performance has improved and that both principal and interest are collectible.  This generally requires a sustained period of timely principal and interest payments and a well-documented credit evaluation of the borrower’s financial condition.

A loan is considered modified in a troubled debt restructuring (“TDR”) when, due to a borrower’s financial difficulties, the Company makes a concession(s) to the borrower that it would not otherwise consider.  These modifications may include, among others, an extension for the term of the loan, or granting a period when interest–only payments can be made with the principal payments and interest caught up over the remaining term of the loan or at maturity.  Generally, a nonaccrual loan that has been modified in a TDR remains on nonaccrual status for a period of 12 months to demonstrate that the borrower is able to meet the terms of the modified loan.  If the borrower’s ability to meet the revised payment schedule is uncertain, the loan remains on nonaccrual status.

Regulatory guidance issued by the OCC requires certain loans that have been discharged in Chapter 7 bankruptcy to be reported as TDRs.  In accordance with this guidance, loans that have been discharged in Chapter 7 bankruptcy but not reaffirmed by the borrower are classified as TDRs, irrespective of payment history or delinquency status, even if the repayment terms for the loan have not been otherwise modified and the Company’s lien position against the underlying collateral remains unchanged.  Pursuant to that guidance, the Company records a charge-off equal to any portion of the carrying value that exceeds the net realizable value of the collateral.

Commercial loans greater than $0.5 million are evaluated individually for impairment.  A loan is considered impaired, based on current information and events, if it is probable that the Company will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement.  The measurement of impaired loans is generally based upon the present value of expected future cash flows or the fair value of the collateral, if the loan is collateral-dependent.

The Company’s charge-off policy by loan type is as follows:

· Business lending loans are generally charged-off to the extent outstanding principal exceeds the fair value of estimated proceeds from collection efforts, including liquidation of collateral.  The charge-off is recognized when the loss becomes reasonably quantifiable.

· Consumer installment loans are generally charged-off to the extent outstanding principal exceeds the fair value of collateral, and are recognized by the end of the month in which the loan becomes 90 days past due.

· Consumer mortgage and home equity loans are generally charged-off to the extent outstanding principal exceeds the fair value of the property, less estimated costs to sell, and are recognized when the loan becomes 180 days past due.

Allowance for Loan Losses

Management continually evaluates the credit quality of the Company’s loan portfolio, and performs a formal review of the adequacy of the allowance for loan losses on a quarterly basis.  The allowance reflects management’s best estimate of probable losses inherent in the loan portfolio.  Determination of the allowance is subjective in nature and requires significant estimates.   The Company’s allowance methodology consists of two broad components - general and specific loan loss allocations.

The general loan loss allocation is composed of two calculations that are computed on five main loan segments:  business lending, consumer direct, consumer indirect, home equity and consumer mortgage.  The first calculation is quantitative and determines an allowance level based on the latest 36 months of historical net charge-off data for each loan class (commercial loans exclude balances with specific loan loss allocations).  The second calculation is qualitative and takes into consideration eight qualitative environmental factors:  levels and trends in delinquencies and impaired loans; levels of and trends in charge-offs and recoveries; trends in volume and terms of loans; effects of any changes in risk selection and underwriting standards, and other changes in lending policies, procedures, and practices; experience, ability, and depth of lending management and other relevant staff; national and local economic trends and conditions; industry conditions; and effects of changes in credit concentrations.    A component of the qualitative calculation is the unallocated allowance for loan loss.  The qualitative and quantitative calculations are added together to determine the general loan loss allocation.  The specific loan loss allocation relates to individual commercial loans that are both greater than $0.5 million and in a nonaccruing status with respect to interest.  Specific loan losses are based on discounted estimated cash flows, including any cash flows resulting from the conversion of collateral or collateral shortfalls.  The allowance levels computed from the specific and general loan loss allocation methods are combined with unallocated allowances and allowances needed for acquired loans to derive the total required allowance for loan losses to be reflected on the Consolidated Statement of Condition.

Loan losses are charged off against the allowance, while recoveries of amounts previously charged off are credited to the allowance.  A provision for loan losses is charged to operations based on management’s periodic evaluation of factors previously mentioned.

Intangible Assets

Intangible assets include core deposit intangibles, customer relationship intangibles and goodwill arising from acquisitions. Core deposit intangibles and customer relationship intangibles are amortized on either an accelerated or straight-line basis over periods ranging from seven to 20 years. The initial and ongoing carrying value of goodwill and other intangible assets is based upon discounted cash flow modeling techniques that require management to make estimates regarding the amount and timing of expected future cash flows.  It also requires use of a discount rate that reflects the current return requirements of the market in relation to present risk-free interest rates, required equity market premiums, peer volatility indicators, and company-specific risk indicators.

The Company evaluates goodwill for impairment on an annual basis, or more often if events or circumstances indicate there may be impairment.  The implied fair value of a reporting unit’s goodwill is compared to its carrying amount and the impairment loss is measured by the excess of the carrying value over fair value.  The fair value of each reporting unit is compared to the carrying amount of that reporting unit in order to determine if impairment is indicated.

Premises and Equipment

Premises and equipment are stated at cost less accumulated depreciation.  Computer software costs that are capitalized only include external direct costs of obtaining and installing the software.  The Company has not developed any internal use software.  Depreciation is calculated using the straight-line method over the estimated useful lives of the assets.  Useful lives range from three to 10 years for equipment; three to seven years for software and hardware; and 10 to 40 years for building and building improvements.  Land improvements are depreciated over 20 years and leasehold improvements are amortized over the shorter of the term of the respective lease plus any optional renewal periods that are reasonably assured or life of the asset. Maintenance and repairs are charged to expense as incurred.

Other Real Estate

Other real estate owned is comprised of properties acquired through foreclosure, or by deed in lieu of foreclosure.  These assets are carried at fair value less estimated costs of disposal.  At foreclosure, if the fair value, less estimated costs to sell, of the real estate acquired is less than the Company’s recorded investment in the related loan, a write-down is recognized through a charge to the allowance for loan losses.  Any subsequent reduction in value is recognized by a charge to income.  Operating costs associated with the properties are charged to expense as incurred.  At December 31, 2017 and 2016, other real estate amounted to $1.9 million and $2.0 million, respectively, and is included in other assets.

Mortgage Servicing Rights

Originated mortgage servicing rights are recorded at their fair value at the time of sale of the underlying loan, and are amortized in proportion to and over the period of estimated net servicing income or loss.  The Company uses a valuation model that calculates the present value of future cash flows to determine the fair value of servicing rights.  In using this valuation method, the Company incorporates assumptions that market participants would use in estimating future net servicing income, which includes estimates of the servicing cost per loan, the discount rate, and prepayment speeds.  The carrying value of the originated mortgage servicing rights is included in other assets and is evaluated quarterly for impairment using these same market assumptions.  The amount of impairment recognized is the amount by which the carrying value of the capitalized servicing rights for a stratum exceeds estimated fair value.  Impairment is recognized through a valuation allowance.

Treasury Stock

Repurchases of shares of the Company’s common stock are recorded at cost as a reduction of shareholders’ equity.  Reissuance of shares of treasury stock is recorded at average cost.

Income Taxes

The Company and its subsidiaries file a consolidated federal income tax return.  Provisions for income taxes are based on taxes currently payable or refundable as well as deferred taxes that are based on temporary differences between the tax basis of assets and liabilities and their reported amounts in the consolidated financial statements.  Deferred tax assets and liabilities are reported in the consolidated financial statements at currently enacted income tax rates applicable to the period in which the deferred tax assets and liabilities are expected to be realized or settled.

Benefits from tax positions should be recognized in the financial statements only when it is more likely than not that the tax position will be sustained upon examination by the appropriate taxing authority having full knowledge of all relevant information. A tax position meeting the more-likely-than-not recognition threshold should be measured at the largest amount of benefit for which the likelihood of realization upon ultimate settlement exceeds 50 percent.

Investments in Real Estate Limited Partnerships

The Company has investments in various real estate limited partnerships that acquire, develop, own and operate low and moderate-income housing.  The Company’s ownership interest in these limited partnerships ranges from 5.00% to 99.99% as of December 31, 2017.  These investments are made directly in Low Income Housing Tax Credit, or LIHTC, partnerships formed by third parties.  As a limited partner in these operating partnerships, we receive tax credits and tax deductions for losses incurred by the underlying properties.

The Company accounts for its ownership interest in LIHTC partnerships in accordance with Accounting Standards Update (“ASU”) 2014-01, Investments – Equity Method and Joint Ventures (Topic 323):  Accounting for Investments in Qualified Affordable Housing Projects.  The standard permits an entity to amortize the initial cost of the investment in proportion to the amount of the tax credits and other tax benefits received and recognize the net investment performance in the income statement as a component of income tax expense.  The Company has unfunded commitments of $3.2 million at year-end related to qualified affordable housing project investments, which will be funded in 2018.  There were no impairment losses during the year resulting from the forfeiture or ineligibility of tax credits related to qualified affordable housing project investments.

Repurchase Agreements

The Company sells certain securities under agreements to repurchase.  These agreements are treated as collateralized financing transactions.  These secured borrowings are reflected as liabilities in the accompanying consolidated statements of condition and are recorded at the amount of cash received in connection with the transaction.  Short-term securities sold under agreements to repurchase generally mature within one day from the transaction date.  Securities, generally U.S. government and federal agency securities, pledged as collateral under these financing arrangements can be repledged by the secured party.  Additional collateral may be required based on the fair value of the underlying securities.

Retirement Benefits

The Company provides defined benefit pension benefits to eligible employees and post-retirement health and life insurance benefits to certain eligible retirees.  The Company also provides deferred compensation and supplemental executive retirement plans for selected current and former employees, officers, and directors.  Expense under these plans is charged to current operations and consists of several components of net periodic benefit cost based on various actuarial assumptions regarding future experience under the plans, including discount rate, rate of future compensation increases and expected return on plan assets.

Derivative Financial Instruments and Hedging Activities

The Company accounts for derivative financial instruments at fair value.  If certain conditions are met, a derivative may be specifically designated as (1) a hedge of the exposure to changes in the fair value of a recognized asset or liability or an unrecognized firm commitment (“fair value hedge”), (2) a hedge of the exposure to variable cash flows of a forecasted transaction or the variability of cash flows to be received or paid related to a recognized asset or liability (“cash flow hedge”), or (3) an instrument with no hedging designation (“stand-alone derivative”).  For a fair value hedge, the gain or loss on the derivative, as well as the offsetting loss or gain on the hedged item, are recognized in current earnings as fair values change.  For a cash flow hedge, the gain or loss on the derivative is reported in other comprehensive income and is reclassified into earnings in the same periods during which the hedged transaction affects earnings.  For both types of hedges, changes in the fair value of derivatives that are not highly effective in hedging the changes in fair value or expected cash flows of the hedged item are recognized immediately in current earnings.  Changes in the fair value of derivatives that do not qualify for hedge accounting are reported currently in earnings, as noninterest income.

Net cash settlements on derivatives that qualify for hedge accounting are recorded in interest income or interest expense, based on the item being hedged.  Net cash settlements on derivatives that do not qualify for hedge accounting are reported in noninterest income.  Cash flows on hedges are classified in the consolidated statement of cash flow statement the same as the cash flows of the items being hedged.

The Company formally documents the relationship between derivatives and hedged items, as well as the risk-management objective and strategy for undertaking hedge transactions at the inception of the hedging relationship.  This documentation includes linking the fair value or cash flow hedges to specific assets and liabilities on the statement of condition or to specific commitments or forecasted transactions.  The Company also formally assesses, both at the hedge’s inception and on an ongoing basis, whether the derivative instruments that are used are highly effective in offsetting changes in fair values or cash flows of the hedged items.

When hedge accounting is discontinued, subsequent changes in fair value of the derivative are recorded in noninterest income.  When a fair value hedge is discontinued, the hedged asset or liability is no longer adjusted for changes in fair value and the existing basis adjustment is amortized or accreted over the remaining life of the asset or liability.  When a cash flow hedge is discontinued, but the hedged cash flows or forecasted transactions are still expected to occur, gains or losses that were accumulated in other comprehensive income are amortized into earnings over the same periods which the hedged transactions will affect earnings.

Assets Under Management or Administration

Assets held in fiduciary or agency capacities for customers are not included in the accompanying consolidated statements of condition as they are not assets of the Company.  All fees associated with providing asset management services are recorded on an accrual basis of accounting and are included in noninterest income.

Advertising

Advertising costs amounting to approximately $5.7 million, $3.9 million and $3.6 million for the years ending December 31, 2017, 2016 and 2015, respectively, are nondirect response in nature and expensed as incurred.

Bank Owned Life Insurance

The Company owns life insurance policies on certain current and former employees and directors where the Bank is the beneficiary.  Bank owned life insurance is recorded at the amount that can be realized under the insurance contract at the balance sheet date, which is the cash surrender value (“CSV”) adjusted for other charges or other amounts due that are probable at settlement.  Increases in the CSV of the policies, as well as the death benefits received, net of any CSV, are recorded in noninterest income, and are not subject to income taxes.

Earnings Per Share

Using the two-class method, basic earnings per common share is computed based upon net income available to common shareholders divided by the weighted average number of common shares outstanding during each period, which excludes the outstanding unvested restricted stock.  Diluted earnings per share is computed using the weighted average number of common shares determined for the basic earnings per common share computation plus the dilutive effect of stock options using the treasury stock method.  Stock options where the exercise price is greater than the average market price of common shares were not included in the computation of earnings per diluted share as they would have been anti-dilutive. Shares held in rabbi trusts related to deferred compensation plans are considered outstanding for purposes of computing earnings per share.

Stock-based Compensation

Companies are required to measure and record compensation expense for stock options and other share-based payments on the instruments’ fair value on the date of grant.  Stock-based compensation expense is recognized ratably over the requisite service period for all awards (see Note L).

Fair Values of Financial Instruments

The Company determines fair values based on quoted market values where available or on estimates using present values or other valuation techniques.  Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows.  In that regard, the derived fair value estimates cannot be substantiated by comparison to independent markets and, in many cases, could not be realized in immediate settlement of the instrument.  Certain financial instruments and all nonfinancial instruments are excluded from this disclosure requirement.  Accordingly, the aggregate fair value amounts presented do not represent the underlying value of the Company.  The fair values of investment securities, loans, deposits, and borrowings have been disclosed in Note R.

Reclassifications

Certain reclassifications have been made to prior years’ balances to conform to the current year presentation.

Recently Adopted Accounting Pronouncements

In March 2016, the FASB issued ASU 2016-09, Compensation – Stock Compensation (Topic 718).  The amendments simplify several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, accounting for award forfeitures, and classification on the statement of cash flows.  The amendments were effective for public business entities for the first interim and annual reporting periods beginning after December 15, 2016 and the Company adopted the amendments as of January 1, 2017.  The new guidance requires entities to prospectively recognize all excess tax benefits and tax deficiencies related to share-based payment awards as income tax benefit or expense in the statement of income when the awards vest or are settled.  Previously, income tax benefits (or deficiencies) were reported as increases (or decreases) to additional paid-in capital to the extent that those benefits were greater than (or less than) the income tax benefits recognized in earnings during the awards’ vesting periods.  In addition, excess tax benefits and deficiencies are to be classified as an operating activity in the statement of cash flows, rather than a financing activity as required under prior accounting guidance.  The new guidance also requires employee taxes paid when an employer withholds shares for withholding tax purposes to be classified as a financing activity in the statement of cash flows.  The Company has elected to apply the changes in presentation on the consolidated statement of cash flows for excess tax benefits and deficiencies and employee taxes paid when an employer withholds shares on a retrospective basis.  The Company has also elected to continue to incorporate estimated forfeitures in the accrual of compensation expense, and this election had no impact on the Company’s consolidated financial statements.  For the year ended December 31, 2017, the effect on net income from excess tax benefits was $3.1 million, or approximately $0.06 per diluted common share.

In February 2018, the FASB issued ASU 2018-02, Income Statement – Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income.  The ASU required a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the reduction in the corporate income tax rate to 21% with the newly enacted Tax Cuts and Jobs Act.  This guidance is effective for fiscal years beginning after December 15, 2018; however, the Company chose to early adopt the new standard for the year ended December 31, 2017, as allowed under the new standard.  The amount of the reclassification for the Company was $0.6 million, as shown in the Consolidated Statement of Changes in Stockholder's Equity.

New Accounting Pronouncements

In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606).  This new guidance supersedes the revenue recognition requirements in ASC 605, Revenue Recognition, and is based on the principle that revenue is recognized to depict the transfer of goods or services to customers in an amount that reflects consideration to which the entity expects to be entitled in exchange for those goods and services. The ASU also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments and assets recognized from costs incurred to obtain or fulfill a contract.  This guidance is effective for the Company for annual and interim periods beginning after December 15, 2017.  The Company has finalized its in-depth assessment and identified the revenue line items within the scope of this new guidance.  Neither the new standard, nor any of the amendments, resulted in a material change from the Company’s current accounting for revenues because no changes in accounting were required for those financial instruments that were within scope of Topic 606.  The Company adopted this guidance on January 1, 2018 and has elected to implement using the modified retrospective application, with the cumulative effect recorded as an adjustment to opening retained earnings at January 1, 2018.  Due to immateriality, the Company will have no cumulative effect to record.  The Company is still finalizing the changes to the related disclosures.

In January 2016, the FASB issued ASU 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. This guidance addresses certain aspects of recognition, measurement, presentation and disclosure of financial instruments. The primary focus of this guidance is to supersede the guidance to classify equity securities with readily determinable fair values into different categories (trading or available-for-sale) and requires equity securities to be measured at fair value with changes in the fair value recognized through net income. This guidance requires adoption through a cumulative-effect adjustment to the balance sheet as of the beginning of the fiscal year of adoption.  This ASU is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years.  Early adoption is permitted for all companies in any interim or annual period. The Company has completed its evaluation of adoption of the new guidance on the Company’s consolidated financial statements and the impact was considered immaterial.

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). This new guidance supersedes the lease requirements in Topic 840, Leases and is based on the principle that a lessee should recognize in the statement of financial position a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term.  The accounting applied by a lessor is largely unchanged from that applied under the previous guidance.  In addition, the guidance requires an entity to separate the lease components from the nonlease components in a contract.  The ASU requires disclosures about the amount, timing, and judgments related to a reporting entity’s accounting for leases and related cash flows.  The standard is required to be applied to all leases in existence as of the date of adoption using a modified retrospective transition approach.  This guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted for all companies in any interim or annual period.  The Company occupies certain offices and uses certain equipment under non-cancelable operating lease agreements, which currently are not reflected in its consolidated statement of condition.  The Company expects to recognize lease liabilities and right of use assets associated with these lease agreements; however, the extent of the impact on the Company’s consolidated financial statements is currently under evaluation.

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments – Credit Losses (Topic 326).  This new guidance significantly changes how entities will measure credit losses for most financial assets and certain other instruments that are not measured at fair value through net income.  This ASU will replace the “incurred loss” model under existing guidance with an “expected loss” model for instruments measured at amortized cost, and require entities to record allowances for available-for-sale debt securities rather than reduce the carrying amount, as they do today under the other-than-temporary impairment model.  This ASU also simplifies the accounting model for purchased credit-impaired debt securities and loans.  This guidance requires adoption through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is adopted.  This ASU is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years.  Early adoption is permitted for all companies as of fiscal years beginning after December 15, 2018, including interim periods within those fiscal years.  The Company is currently evaluating the impact the guidance will have on the Company’s consolidated financial statements, and expects a change in the allowance for loan losses resulting from the change to expected losses for the estimated life of the financial asset, including an allowance for debt securities. The amount of the change in the allowance for loan losses resulting from the new guidance will be impacted by the portfolio composition and asset quality at the adoption date, as well as economic conditions and forecasts at the time of adoption.

In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230). The amendments provide guidance on the following eight specific cash flow issues: 1) debt prepayment or debt extinguishment costs; 2) settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effective interest rate of the borrowing; 3) contingent consideration payments made after a business combination; 4) proceeds from the settlement of insurance claims; 5) proceeds from the settlement of corporate-owned life insurance policies, including bank-owned life insurance policies; 6) distributions received from equity method investees; 7) beneficial interests in securitization transactions; and 8) separately identifiable cash flows and application of the predominance principle. This ASU is effective for fiscal years beginning after December 31, 2017, including interim periods within those fiscal years.  The Company adopted this guidance on January 1, 2018.  As this guidance only affects the classification within the statement of cash flows, this ASU will not have a material impact on the Company’s consolidated financial statements.

In January 2017, the FASB issued ASU No. 2017-04, Intangibles-Goodwill and Other (Topic 350). The amendments simplify how an entity is required to test goodwill for impairment by eliminating the requirement to measure a goodwill impairment loss by comparing the implied fair value of a reporting unit’s goodwill with the carrying amount of that goodwill.  Instead, an entity will perform its goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount, and recognize an impairment charge for the amount by which the carrying amount of the reporting unit exceeds its fair value.  Impairment loss recognized under this new guidance will be limited to the goodwill allocated to the reporting unit.  This ASU is effective prospectively for the Company for annual or interim goodwill impairment tests in fiscal years beginning after December 15, 2019.  Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017.  This ASU did not have a material impact on the Company’s consolidated financial statements.

In March 2017, the FASB issued ASU No. 2017-07, Compensation – Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost.  This new guidance requires the service cost component of net periodic pension and postretirement benefit costs to be presented separately from other components of net benefit cost in the statement of income.  This ASU is effective for the Company for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years.  The Company adopted this guidance on January 1, 2018.  This ASU will not have a material impact on the Company’s consolidated financial statements.

In August 2017, the FASB issued ASU No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities.  This new guidance amends current guidance to better align hedge accounting with risk management activities and reduce the complexity involved in applying hedge accounting.  Under this new guidance, the concept of hedge ineffectiveness will be eliminated.  Ineffective income generated by cash flow and net investment hedges will be recognized in the same financial reporting period and income statement line item as effective income, so as to reflect the full cost of hedging at one time and in one place. Ineffective income generated by fair value hedges will continue to be reflected in current period earnings; however, it will be recognized in the same income statement line item as effective income. The guidance will also allow any contractually specified variable rate to be designated as the hedged risk in a cash flow hedge.  With respect to fair value hedges of interest rate risk, the guidance will allow changes in the fair value of the hedged item to be calculated solely using changes in the benchmark interest rate component of the instrument’s total contractual coupon cash flows. This ASU is effective for the Company for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years.  Early adoption is permitted, including adoption in an interim period.  This ASU is not expected to have a material impact on the Company’s consolidated financial statements.

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ACQUISITIONS

12 Months Ended

Dec. 31, 2017

ACQUISITIONS [Abstract]

ACQUISITIONS

NOTE B: ACQUISITIONS

On December 4, 2017, the Company, through its subsidiary, OneGroup, completed its acquisition of Gordon B. Roberts Agency, Inc. (“GBR”), an insurance agency headquartered in Oneonta, New York for $3.7 million in Company stock and cash, comprised of $1.35 million in cash and the issuance of 0.04 million shares of common stock.  The transaction resulted in the acquisition of $0.6 million of assets, $0.7 million of other liabilities, goodwill in the amount of $2.2 million and other intangible assets of $1.6 million.  The effects of the acquired assets and liabilities have been included in the consolidated financial statements since that date.

On November 17, 2017, the Company, through its subsidiary, CISI, completed its acquisition of certain assets of Northeast Capital Management, Inc. (“NECM”), a financial services business headquartered in Wilkes Barre, Pennsylvania.  The Company agreed to pay $1.2 million in cash, including a $0.2 million contingent payment based on certain customer retention objectives, to acquire a customer list from NECM, and recorded a $1.2 million customer list intangible asset in conjunction with the acquisition.  The effects of the acquired assets have been included in the consolidated financial statements since that date.

On May 12, 2017, the Company completed its acquisition of Merchants Bancshares, Inc. (“Merchants”), parent company of Merchants Bank, headquartered in South Burlington, Vermont, for $345.2 million in Company stock and cash, comprised of $82.9 million in cash and the issuance of 4.68 million shares of common stock.  The acquisition extends the Company’s footprint into the Vermont and Western Massachusetts markets with the addition of 31 branch locations in Vermont and one location in Massachusetts.  This transaction resulted in the acquisition of $2.0 billion of assets, including $1.49 billion of loans and $370.6 million of investment securities, as well as $1.45 billion of deposits and $189.0 million in goodwill.  The effects of the acquired assets and liabilities have been included in the consolidated financial statements since that date.  Revenues of approximately $42.6 million and direct expenses, which may not include certain shared expenses, of approximately $19.9 million from Merchants were included in the consolidated income statement for the year ended December 31, 2017.

On March 1, 2017, the Company, through its subsidiary, OneGroup, completed its acquisition of certain assets of Dryfoos Insurance Agency, Inc. (“Dryfoos”), an insurance agency headquartered in Hazleton, Pennsylvania.  The Company paid $3.0 million in cash to acquire the assets of Dryfoos, and recorded goodwill in the amount of $1.7 million and other intangible assets of $1.7 million in conjunction with the acquisition.  The effects of the acquired assets and liabilities have been included in the consolidated financial statements since that date.

On February 3, 2017, the Company completed its acquisition of NRS and its subsidiary GTC, headquartered in Woburn, Massachusetts, for $148.6 million in Company stock and cash.  NRS was a privately held corporation focused on providing institutional transfer agency, master recordkeeping services, custom target date fund administration, trust product administration and customized reporting services to institutional clients.  Its wholly-owned subsidiary, GTC, is chartered in the State of Maine as a non-depository trust company and provides fiduciary services for collective investment trusts and other products.  The acquisition of NRS and GTC, hereafter referred to collectively as NRS, will strengthen and complement the Company’s existing employee benefit services businesses.  Upon the completion of the merger, NRS became a wholly-owned subsidiary of BPAS and operates as Northeast Retirement Services, LLC, a Delaware limited liability company.  This transaction resulted in the acquisition of $36.1 million in net tangible assets, principally cash and certificates of deposit, $60.2 million in customer list intangibles that will be amortized using the 150% declining balance method over 10 years, a $24.2 million deferred tax liability associated with the customer list intangible, and $76.4 million in goodwill.  The effects of the acquired assets and liabilities have been included in the consolidated financial statements since that date. Revenues of $31.5 million and expenses of $21.5 million from NRS were included in the consolidated statement of income for the year ended December 31, 2017.

On January 1, 2017, the Company, through its subsidiary, OneGroup, acquired certain assets of Benefits Advisory Service, Inc. (“BAS”), a benefits consulting group headquartered in Forest Hills, New York.  The Company paid $1.2 million in cash to acquire the assets of BAS and recorded intangible assets of $1.2 million in conjunction with the acquisition.  The effects of the acquired assets and liabilities have been included in the consolidated financial statements since that date.

On January 4, 2016, the Company, through its subsidiary, CBNA Insurance Agency, Inc. (“CBNA Insurance”), completed its acquisition of WJL Agencies Inc. doing business as The Clark Insurance Agencies (“WJL”), an insurance agency operating in Canton, New York. The Company paid $0.6 million in cash for the intangible assets of the company.  Goodwill in the amount of $0.3 million and intangible assets in the amount of $0.3 million were recorded in conjunction with the acquisition.  The effects of the acquired assets and liabilities have been included in the consolidated financial statements since that date.  On August 19, 2016, the Company merged together its insurance subsidiaries and as of that date, the activities of CBNA Insurance were merged into OneGroup.

On December 4, 2015, the Company completed its acquisition of Oneida Financial Corp. (“Oneida”), parent company of Oneida Savings Bank, headquartered in Oneida, New York for $158.5 million in Company stock and cash, comprised of $56.3 million of cash and the issuance of 2.38 million common shares.  Upon the completion of the merger, the Bank added 12 branch locations in Oneida and Madison counties and approximately $769.4 million of assets, including approximately $399.4 million of loans and $225.7 million of investment securities, along with $699.2 million of deposits.  Through the acquisition of Oneida, the Company acquired OneGroup and Oneida Wealth Management, Inc. (“OWM”) as wholly-owned subsidiaries primarily engaged in offering insurance and investment advisory services.  These subsidiaries complement the Company’s other non-banking financial services businesses. The effects of the acquired assets and liabilities have been included in the consolidated financial statements since that date.  On April 22, 2016, the activities of OWM were merged into CISI.

The assets and liabilities assumed in the acquisitions were recorded at their estimated fair values based on management's best estimates using information available at the dates of the acquisition, and were subject to adjustment based on updated information not available at the time of acquisition.  During the second quarter of 2017, the carrying amount of other assets decreased by $2.7 million and other liabilities decreased by $2.4 million as a result of a reclassification of amounts from other assets into other liabilities, and an adjustment to other liabilities as a result of updated information not available at the time of acquisition.  Goodwill associated with the NRS acquisition increased $0.3 million during the second quarter as a result of these changes in fair value.  During the third quarter of 2017, the carrying amount of investments increased by $0.2 million as a result of updated information not available at the time of acquisition, the carrying amount of loans decreased $0.6 million as a result of an adjustment to the valuation of acquired impaired loans, the carrying amount of premises and equipment increased $3.6 million as a result of updated appraisal information not available at the time of acquisition, and the value of other assets and other liabilities increased $5.5 million and $6.6 million, respectively, as a result of adjustments to accrued income taxes, deferred taxes and certain tax credit arrangements that were recorded on a provisional basis.  Goodwill associated with the NRS and Merchants acquisitions decreased $0.1 million and $2.0 million during the third quarter, respectively, as a result of these changes in fair value estimates.  During the fourth quarter of 2017, the carrying amount of loans decreased $0.5 million as a result of an adjustment to the valuation of acquired impaired loans and the value of other assets and other liabilities decreased $0.3 million and $0.02 million, respectively, as a result of adjustments to deferred taxes and certain tax credit arrangements.  Goodwill associated with the Merchants acquisition increased $0.8 million during the fourth quarter as a result of these changes in fair value estimates.

The above referenced acquisitions expanded the Company’s geographical presence in New York, Pennsylvania, Vermont, and Western Massachusetts and management expects that the Company will benefit from greater geographic diversity and the advantages of other synergistic business development opportunities.

The following table summarizes the estimated fair value of the assets acquired and liabilities assumed after considering the measurement period adjustments described above:

	2017												2016		2015
(000s omitted)	NRS			Merchants			Other (1)			Total			WJL		Oneida
Consideration paid :
Cash (2)	$	70,073		$	82,898		$	6,775		$	159,746		$	575	$	56,266
Community Bank System, Inc. common stock		78,483			262,254			2,395			343,132			0		102,202
Total net consideration paid		148,556			345,152			9,170			502,878			575		158,468
Recognized amounts of identifiable assets acquired and liabilities assumed:
Cash and cash equivalents		11,063			40,730			339			52,132			0		81,772
Investment securities		20,294			370,648			0			390,942			0		225,729
Loans		0			1,488,157			0			1,488,157			0		399,422
Premises and equipment		411			16,608			27			17,046			0		22,212
Accrued interest receivable		72			4,773			0			4,845			0		1,133
Other assets		8,088			51,585			583			60,256			0		26,529
Core deposit intangibles		0			23,214			0			23,214			0		2,570
Other intangibles		60,200			2,857			5,626			68,683			288		9,994
Deposits		0			(1,448,406	)		0			(1,448,406	)		0		(699,241	)
Other liabilities		(28,002	)		(11,750	)		(1,217	)		(40,969	)		0		(1,333	)
Short-term advances		0			(80,000	)		0			(80,000	)		0		0
Securities sold under agreement to repurchase, short-term		0			(278,076	)		0			(278,076	)		0		0
Long-term debt		0			(3,615	)		0			(3,615	)		0		0
Subordinated debt held by unconsolidated subsidiary trusts		0			(20,619	)		0			(20,619	)		0		0
Total identifiable assets, net		72,126			156,106			5,358			233,590			288		68,787
Goodwill	$	76,430		$	189,046		$	3,812		$	269,288		$	287	$	89,681

⁽¹⁾ Includes amounts related to the BAS, Dryfoos, NECM and GBR acquisitions.

⁽²⁾ Includes NECM $0.2 million contingent cash payment consideration.

Acquired loans that have evidence of deterioration in credit quality since origination and for which it is probable, at acquisition, that the Company will be unable to collect all contractually required payments were aggregated by comparable characteristics and  recorded at fair value without a carryover of the related allowance for loan losses.  Cash flows for each loan were determined using an estimate of credit losses and rate of prepayments.  Projected monthly cash flows were then discounted to present value using a market-based discount rate.  The excess of the undiscounted expected cash flows over the estimated fair value is referred to as the “accretable yield” and is recognized into interest income over the remaining lives of the acquired loans.

The following is a summary of the loans acquired from Merchants at the date of acquisition:

(000s omitted)	Acquired Impaired Loans			Acquired Non-impaired Loans			Total Acquired Loans
Contractually required principal and interest at acquisition	$	15,454		$	1,872,574		$	1,888,028
Contractual cash flows not expected to be collected		(5,385	)		(14,753	)		(20,138	)
Expected cash flows at acquisition		10,069			1,857,821			1,867,890
Interest component of expected cash flows		(793	)		(378,940	)		(379,733	)
Fair value of acquired loans	$	9,276		$	1,478,881		$	1,488,157

The fair value of checking, savings and money market deposit accounts acquired were assumed to approximate the carrying value as these accounts have no stated maturity and are payable on demand.  Certificate of deposit accounts were valued at the present value of the certificates’ expected contractual payments discounted at market rates for similar certificates.

The core deposit intangibles and other intangibles related to the Merchants, Dryfoos, BAS, WJL and Oneida acquisitions are being amortized using an accelerated method over their estimated useful life of eight years.  The goodwill, which is not amortized for book purposes, was assigned to the Banking segment for the Merchants and Oneida acquisitions, the Employee Benefit Services segment for NRS, and All Other segments for the Dryfoos, BAS, and WJL acquisitions.  Goodwill arising from the Merchants, NRS, GBR and Oneida acquisitions is not deductible for tax purposes.  Goodwill arising from the Dryfoos, BAS and WJL acquisitions is deductible for tax purposes.

Direct costs related to the acquisitions were expensed as incurred.  Merger and acquisition integration-related expenses amount to $26.0 million, $1.7 million and $7.0 million during 2017, 2016 and 2015, respectively, and have been separately stated in the consolidated statements of income.

Supplemental Pro Forma Financial Information

The following unaudited condensed pro forma information assumes the Merchants and NRS acquisitions had been completed as of January 1, 2016 for the year ended December 31, 2017 and December 31, 2016.  The pro forma information does not include amounts related to BAS, Dryfoos, NECM and GBR as the amounts were immaterial. The table below has been prepared for comparative purposes only and is not necessarily indicative of the actual results that would have been attained had the acquisitions occurred as of the beginning of the year presented, nor is it indicative of the Company’s future results. Furthermore, the unaudited pro forma information does not reflect management’s estimate of any revenue-enhancing opportunities nor anticipated cost savings that may have occurred as a result of the integration and consolidation of the acquisitions.

The pro forma information set forth below reflects the historical results of Merchants and NRS combined with the Company’s consolidated statement of income with adjustments related to (a) certain purchase accounting fair value adjustments and (b) amortization of customer lists and core deposit intangibles.  Acquisition expenses related to the Merchants and NRS transactions totaling $25.7 million for the year ended December 31, 2017 were included in the pro forma information as if they were incurred in 2016.

	Pro Forma (Unaudited) Year Ended December 31,
(000’s omitted)	2017		2016
Total revenue, net of interest expense	$	546,977	$	536,183
Net income		176,257		109,186

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INVESTMENT SECURITIES

12 Months Ended

Dec. 31, 2017

INVESTMENT SECURITIES [Abstract]

INVESTMENT SECURITIES

NOTE C: INVESTMENT SECURITIES

The amortized cost and estimated fair value of investment securities as of December 31 are as follows:

	2017								2016
(000's omitted)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value		Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Available-for-Sale Portfolio:
U.S. Treasury and agency securities	$	2,043,023	$	15,886	$	4,838	$	2,054,071	$	1,876,358	$	28,522	$	2,118	$	1,902,762
Obligations of state and political subdivisions		514,949		14,064		57		528,956		582,655		13,389		1,054		594,990
Government agency mortgage-backed securities		358,180		3,121		3,763		357,538		232,657		5,040		2,467		235,230
Corporate debt securities		2,648		0		25		2,623		5,716		2		31		5,687
Government agency collateralized mortgage obligations		88,097		155		878		87,374		9,225		310		0		9,535
Marketable equity securities		251		275		0		526		252		200		0		452
Total available-for-sale portfolio	$	3,007,148	$	33,501	$	9,561	$	3,031,088	$	2,706,863	$	47,463	$	5,670	$	2,748,656
Other Securities:
Federal Home Loan Bank common stock	$	9,896					$	9,896	$	12,191					$	12,191
Federal Reserve Bank common stock		30,690						30,690		19,781						19,781
Certificates of deposit		3,865						3,865		0						0
Other equity securities		5,840						5,840		3,764						3,764
Total other securities	$	50,291					$	50,291	$	35,736					$	35,736

A summary of investment securities that have been in a continuous unrealized loss position for less than or greater than twelve months is as follows:

As of December 31, 2017

		Less than 12 Months					12 Months or Longer					Total
(000's omitted)	#	Fair Value		Gross Unrealized Losses		#	Fair Value		Gross Unrealized Losses		#	Fair Value		Gross Unrealized Losses
Available-for-Sale Portfolio:
U.S. Treasury and agency securities	44	$	699,709	$	4,838	0	$	0	$	0	44	$	699,709	$	4,838
Obligations of state and political subdivisions	45		23,432		57	0		0		0	45		23,432		57
Government agency mortgage-backed securities	120		185,716		1,433	55		75,712		2,330	175		261,428		3,763
Corporate debt securities	1		2,623		25	0		0		0	1		2,623		25
Government agency collateralized mortgage obligations	39		80,041		878	1		1		0	40		80,042		878
Total available-for-sale investment portfolio	249	$	991,521	$	7,231	56	$	75,713	$	2,330	305	$	1,067,234	$	9,561

As of December 31, 2016

		Less than 12 Months					12 Months or Longer					Total
(000's omitted)	#	Fair Value		Gross Unrealized Losses		#	Fair Value		Gross Unrealized Losses		#	Fair Value		Gross Unrealized Losses
Available-for-Sale Portfolio:
U.S. Treasury and agency securities	13	$	449,242	$	2,118	0	$	0	$	0	13	$	449,242	$	2,118
Obligations of state and political subdivisions	197		102,106		1,054	0		0		0	197		102,106		1,054
Government agency mortgage-backed securities	57		83,862		1,637	15		21,788		830	72		105,650		2,467
Corporate debt securities	1		2,677		31	0		0		0	1		2,677		31
Government agency collateralized mortgage obligations	0		0		0	2		2		0	2		2		0
Total available-for-sale investment portfolio	268	$	637,887	$	4,840	17	$	21,790	$	830	285	$	659,677	$	5,670

The unrealized losses reported pertaining to securities issued by the U.S. government and its sponsored entities, include treasuries, agencies, and mortgage-backed securities issued by Ginnie Mae, Fannie Mae, and Freddie Mac which are currently rated AAA by Moody’s Investor Services, AA+ by Standard & Poor’s and are guaranteed by the U.S. government. The majority of the obligations of state and political subdivisions and corporations carry a credit rating of A or better.  Additionally, a majority of the obligations of state and political subdivisions carry a secondary level of credit enhancement. The Company does not intend to sell these securities, nor is it more likely than not that the Company will be required to sell these securities prior to recovery of the amortized cost. The unrealized losses in the portfolios are primarily attributable to changes in interest rates.  As such, management does not believe any individual unrealized loss as of December 31, 2017 represents OTTI.

The amortized cost and estimated fair value of debt securities at December 31, 2017, by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.  Securities not due at a single maturity date are shown separately.

	Available-for-Sale
(000's omitted)	Amortized Cost		Fair Value
Due in one year or less	$	45,966	$	46,042
Due after one through five years		1,565,423		1,572,634
Due after five years through ten years		758,742		769,828
Due after ten years		190,489		197,146
Subtotal		2,560,620		2,585,650
Government agency mortgage-backed securities		358,180		357,538
Government agency collateralized mortgage obligations		88,097		87,374
Total	$	3,006,897	$	3,030,562

Investment securities with a carrying value of $1.530 billion and $1.865 billion at December 31, 2017 and 2016, respectively, were pledged to collateralize certain deposits and borrowings.  As of December 31, 2017, securities pledged to collateralize certain deposits and borrowings included $473.2 million of U.S. Treasury securities that were pledged as collateral for securities sold under agreement to repurchase.  All securities sold under agreement to repurchase as of December 31, 2017 have an overnight and continuous maturity.

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LOANS

12 Months Ended

Dec. 31, 2017

LOANS [Abstract]

LOANS

NOTE D: LOANS

The segments of the Company’s loan portfolio are disaggregated into the following classes that allow management to monitor risk and performance:

· Consumer mortgages consist primarily of fixed rate residential instruments, typically 10 – 30 years in contractual term, secured by first liens on real property.

· Business lending is comprised of general purpose commercial and industrial loans including, but not limited to agricultural-related and dealer floor plans, as well as mortgages on commercial property.

· Consumer indirect consists primarily of installment loans originated through selected dealerships and are secured by automobiles, marine and other recreational vehicles.

· Consumer direct consists of all other loans to consumers such as personal installment loans and lines of credit.

· Home equity products are consumer purpose installment loans or lines of credit most often secured by a first or second lien position on residential real estate with terms up to 30 years.

The balances of these classes at December 31 are summarized as follows:

(000's omitted)	2017			2016
Consumer mortgage	$	2,220,298		$	1,819,701
Business lending		2,424,223			1,490,076
Consumer indirect		1,011,978			1,044,972
Consumer direct		179,929			191,815
Home equity		420,329			401,998
Gross loans, including deferred origination costs		6,256,757			4,948,562
Allowance for loan losses		(47,583	)		(47,233	)
Loans, net of allowance for loan losses	$	6,209,174		$	4,901,329

The Company had approximately $25.3 million and $22.8 million of net deferred loan origination costs included in gross loans as of December 31, 2017 and 2016, respectively.

Certain directors and executive officers of the Company, as well as associates of such persons, are loan customers.  Loans to these individuals were made in the ordinary course of business under normal credit terms and do not have more than a normal risk of collection.  Following is a summary of the aggregate amount of such loans during 2017 and 2016.

(000's omitted)	2017			2016
Balance at beginning of year	$	10,950		$	11,337
New loans		16,617			4,959
Payments		(5,223	)		(5,346	)
Balance at end of year	$	22,344		$	10,950

Acquired loans

Acquired loans are recorded at fair value as of the date of purchase with no allowance for loan loss.  The outstanding principal balance and the related carrying amount of acquired loans included in the Consolidated Statement of Condition at December 31 are as follows:

(000's omitted)	2017		2016
Credit impaired acquired loans:
Outstanding principal balance	$	13,242	$	6,354
Carrying amount		10,115		5,553
Non-impaired acquired loans:
Outstanding principal balance		1,658,780		497,308
Carrying amount		1,626,979		489,807
Total acquired loans:
Outstanding principal balance		1,672,022		503,662
Carrying amount		1,637,094		495,360

The outstanding balance related to credit impaired acquired loans was $13.4 million and $6.6 million at December 31, 2017 and 2016, respectively.  The changes in the accretable discount related to the credit impaired acquired loans are as follows:

(000's omitted)	2017			2016
Balance at beginning of year	$	498		$	810
Merchants acquisition		793			0
Accretion recognized		(905	)		(455	)
Net reclassification to accretable from nonaccretable		590			143
Balance at end of year	$	976		$	498

Credit Quality

Management monitors the credit quality of its loan portfolio on an ongoing basis.  Measurement of delinquency and past due status are based on the contractual terms of each loan.  Past due loans are reviewed on a monthly basis to identify loans for non-accrual status.  The following is an aged analysis of the Company’s past due loans by class as of December 31, 2017:

Legacy Loans (excludes loans acquired after January 1, 2009)

(000’s omitted)	Past Due 30 - 89 days		90+ Days Past Due and Still Accruing		Nonaccrual		Total Past Due		Current		Total Loans
Consumer mortgage	$	13,564	$	1,500	$	10,722	$	25,786	$	1,728,823	$	1,754,609
Business lending		2,283		571		3,944		6,798		1,369,801		1,376,599
Consumer indirect		14,197		295		0		14,492		977,344		991,836
Consumer direct		1,875		48		0		1,923		172,556		174,479
Home equity		1,116		94		1,354		2,564		319,576		322,140
Total	$	33,035	$	2,508	$	16,020	$	51,563	$	4,568,100	$	4,619,663

Acquired Loans (includes loans acquired after January 1, 2009)

(000’s omitted)	Past Due 30 - 89 days		90+ Days Past Due and Still Accruing		Nonaccrual		Total Past Due		Acquired Impaired(1)		Current		Total Loans
Consumer mortgage	$	2,603	$	26	$	3,066	$	5,695	$	0	$	459,994	$	465,689
Business lending		4,661		0		4,328		8,989		10,115		1,028,520		1,047,624
Consumer indirect		245		8		0		253		0		19,889		20,142
Consumer direct		100		0		0		100		0		5,350		5,450
Home equity		634		170		1,326		2,130		0		96,059		98,189
Total	$	8,243	$	204	$	8,720	$	17,167	$	10,115	$	1,609,812	$	1,637,094

⁽¹⁾ Acquired impaired loans were not classified as nonperforming assets as the loans are considered to be performing under ASC 310-30.  As a result interest income, through the accretion of the difference between the carrying amount of the loans and the expected cashflows, is being recognized on all acquired impaired loans.

The following is an aged analysis of the Company’s past due loans by class as of December 31, 2016:

Legacy Loans (excludes loans acquired after January 1, 2009)

(000’s omitted)	Past Due 30 - 89 days		90+ Days Past Due and Still Accruing		Nonaccrual		Total Past Due		Current		Total Loans
Consumer mortgage	$	11,379	$	1,180	$	11,352	$	23,911	$	1,635,849	$	1,659,760
Business lending		3,921		145		3,811		7,877		1,269,789		1,277,666
Consumer indirect		13,883		166		0		14,049		1,000,776		1,014,825
Consumer direct		1,549		58		0		1,607		180,315		181,922
Home equity		1,250		414		1,437		3,101		315,928		319,029
Total	$	31,982	$	1,963	$	16,600	$	50,545	$	4,402,657	$	4,453,202

Acquired Loans (includes loans acquired after January 1, 2009)

(000’s omitted)	Past Due 30 - 89 days		90+ Days Past Due and Still Accruing		Nonaccrual		Total Past Due		Acquired Impaired(1)		Current		Total Loans
Consumer mortgage	$	1,539	$	205	$	2,332	$	4,076	$	0	$	155,865	$	159,941
Business lending		528		0		1,252		1,780		5,553		205,077		212,410
Consumer indirect		231		3		0		234		0		29,913		30,147
Consumer direct		231		0		0		231		0		9,662		9,893
Home equity		778		905		435		2,118		0		80,851		82,969
Total	$	3,307	$	1,113	$	4,019	$	8,439	$	5,553	$	481,368	$	495,360

⁽¹⁾ Acquired impaired loans were not classified as nonperforming assets as the loans are considered to be performing under ASC 310-30.  As a result interest income, through the accretion of the difference between the carrying amount of the loans and the expected cashflows, is being recognized on all acquired impaired loans.

The Company uses several credit quality indicators to assess credit risk in an ongoing manner.  The Company’s primary credit quality indicator for its business lending portfolio is an internal credit risk rating system that categorizes loans as “pass”, “special mention”, “classified”, or “doubtful”.  Credit risk ratings are applied individually to those classes of loans that have significant or unique credit characteristics that benefit from a case-by-case evaluation.  In general, the following are the definitions of the Company’s credit quality indicators:

Pass	The condition of the borrower and the performance of the loans are satisfactory or better.
Special Mention	The condition of the borrower has deteriorated although the loan performs as agreed.
Classified	The condition of the borrower has significantly deteriorated and the performance of the loan could further deteriorate if deficiencies are not corrected.
Doubtful	The condition of the borrower has deteriorated to the point that collection of the balance is improbable based on current facts and conditions.

The following table shows the amount of business lending loans by credit quality category:

	December 31, 2017						December 31, 2016
(000’s omitted)	Legacy		Acquired		Total		Legacy		Acquired		Total
Pass	$	1,170,156	$	963,981	$	2,134,137	$	1,051,005	$	162,165	$	1,213,170
Special mention		129,076		37,321		166,397		135,602		29,690		165,292
Classified		77,367		34,628		111,995		90,585		15,002		105,587
Doubtful		0		1,579		1,579		474		0		474
Acquired impaired		0		10,115		10,115		0		5,553		5,553
Total	$	1,376,599	$	1,047,624	$	2,424,223	$	1,277,666	$	212,410	$	1,490,076

All other loans are underwritten and structured using standardized criteria and characteristics, primarily payment performance, and are normally risk rated and monitored collectively on a monthly basis.  These are typically loans to individuals in the consumer categories and are delineated as either performing or nonperforming.  Performing loans include current, 30 – 89 days past due and acquired impaired loans.  Nonperforming loans include 90+ days past due and still accruing and nonaccrual loans.  The following tables detail the balances in all loan categories except for business lending at December 31, 2017:

Legacy loans (excludes loans acquired after January 1, 2009)

(000’s omitted)	Consumer Mortgage		Consumer Indirect		Consumer Direct		Home Equity		Total
Performing	$	1,742,387	$	991,541	$	174,431	$	320,692	$	3,229,051
Nonperforming		12,222		295		48		1,448		14,013
Total	$	1,754,609	$	991,836	$	174,479	$	322,140	$	3,243,064

Acquired loans (includes loans acquired after January 1, 2009)

(000’s omitted)	Consumer Mortgage		Consumer Indirect		Consumer Direct		Home Equity		Total
Performing	$	462,597	$	20,134	$	5,450	$	96,693	$	584,874
Nonperforming		3,092		8		0		1,496		4,596
Total	$	465,689	$	20,142	$	5,450	$	98,189	$	589,470

The following table details the balances in all other loan categories at December 31, 2016:

Legacy loans (excludes loans acquired after January 1, 2009)

(000’s omitted)	Consumer Mortgage		Consumer Indirect		Consumer Direct		Home Equity		Total
Performing	$	1,647,228	$	1,014,659	$	181,864	$	317,178	$	3,160,929
Nonperforming		12,532		166		58		1,851		14,607
Total	$	1,659,760	$	1,014,825	$	181,922	$	319,029	$	3,175,536

Acquired loans (includes loans acquired after January 1, 2009)

(000’s omitted)	Consumer Mortgage		Consumer Indirect		Consumer Direct		Home Equity		Total
Performing	$	157,404	$	30,144	$	9,893	$	81,629	$	279,070
Nonperforming		2,537		3		0		1,340		3,880
Total	$	159,941	$	30,147	$	9,893	$	82,969	$	282,950

All loan classes are collectively evaluated for impairment except business lending, as described in Note A.  A summary of individually evaluated impaired loans as of December 31, 2017 and 2016 is as follows:

(000’s omitted)	2017		2016
Loans with allowance allocation	$	5,125	$	1,109
Loans without allowance allocation		884		556
Carrying balance		6,009		1,665
Contractual balance		9,165		3,340
Specifically allocated allowance		804		477
Average impaired loans		9,517		4,683
Interest income recognized		0		0

In the course of working with borrowers, the Company may choose to restructure the contractual terms of certain loans.  In this scenario, the Company attempts to work-out an alternative payment schedule with the borrower in order to optimize collectability of the loan.  Any loans that are modified are reviewed by the Company to identify if a troubled debt restructuring (“TDR”) has occurred, which is when, for economic or legal reasons related to a borrower’s financial difficulties, the Company grants a concession to the borrower that it would not otherwise consider.  Terms may be modified to fit the ability of the borrower to repay in line with its current financial standing and the restructuring of the loan may include the transfer of assets from the borrower to satisfy the debt, a modification of loan terms, or a combination of the two.  With regard to determination of the amount of the allowance for loan losses, troubled debt restructured loans are considered to be impaired.  As a result, the determination of the amount of allowance for loan losses related to impaired loans for each portfolio segment within TDRs is the same as detailed previously.

In accordance with clarified guidance issued by the OCC, loans that have been discharged in Chapter 7 bankruptcy but not reaffirmed by the borrower, are classified as TDRs, irrespective of payment history or delinquency status, even if the repayment terms for the loan have not been otherwise modified.  The Company’s lien position against the underlying collateral remains unchanged.  Pursuant to that guidance, the Company records a charge-off equal to any portion of the carrying value that exceeds the net realizable value of the collateral.  The amount of loss incurred in 2017, 2016 and 2015 was immaterial.

TDRs less than $0.5 million are collectively included in the general loan loss allocation and the qualitative review, if necessary.  Commercial loans greater than $0.5 million are individually evaluated for impairment, and if necessary, a specific allocation of the allowance for loan losses is provided.

Information regarding TDRs as of December 31, 2017 and December 31, 2016 is as follows

	December 31, 2017												December 31, 2016
(000’s omitted)	Nonaccrual				Accruing				Total				Nonaccrual				Accruing				Total
		#	Amount			#	Amount			#	Amount			#	Amount			#	Amount			#	Amount
Consumer mortgage		51	$	2,265		44	$	1,750		95	$	4,015		36	$	1,520		45	$	1,956		81	$	3,476
Business lending		8		218		7		501		15		719		6		91		5		690		11		781
Consumer indirect		0		0		71		883		71		883		0		0		78		771		78		771
Consumer direct		0		0		25		69		25		69		0		0		23		65		23		65
Home equity		13		245		7		204		20		449		14		221		7		216		21		437
Total		72	$	2,728		154	$	3,407		226	$	6,135		56	$	1,832		158	$	3,698		214	$	5,530

The following table presents information related to loans modified in a TDR during the years ended December 31, 2017 and 2016.  Of the loans noted in the table below, all loans for the years ended December 31, 2017 and December 31, 2016, were modified due to a Chapter 7 bankruptcy as described previously.  The financial effects of these restructurings were immaterial.

	December 31, 2017				December 31, 2016
(000’s omitted)		#	Amount			#	Amount
Consumer mortgage		23	$	1,254		9	$	597
Business lending		8		412		0		0
Consumer indirect		33		490		33		459
Consumer direct		6		17		3		51
Home equity		4		95		3		50
Total		74	$	2,268		48	$	1,157

Allowance for Loan Losses

The allowance for loan losses is general in nature and is available to absorb losses from any loan type despite the analysis below.  The following presents by class the activity in the allowance for loan losses:

(000’s omitted)	Consumer Mortgage			Business Lending			Consumer Indirect			Consumer Direct			Home Equity			Unallocated			Acquired Impaired			Total
Balance at December 31, 2014	$	10,286		$	15,787		$	11,544		$	3,083		$	2,701		$	1,767		$	173		$	45,341
Charge-offs		(1,374	)		(2,146	)		(6,714	)		(1,490	)		(244	)		0			(103	)		(12,071	)
Recoveries		80			877			3,943			722			62			0			0			5,684
Provision		1,206			1,231			3,649			682			147			(566	)		98			6,447
Balance at December 31, 2015		10,198			15,749			12,422			2,997			2,666			1,201			168			45,401
Charge-offs		(647	)		(1,872	)		(7,643	)		(1,706	)		(218	)		0			(97	)		(12,183	)
Recoveries		115			616			4,168			901			139			0			0			5,939
Provision		428			2,727			4,835			787			(188	)		(550	)		37			8,076
Balance at December 31, 2016		10,094			17,220			13,782			2,979			2,399			651			108			47,233
Charge-offs		(707	)		(4,959	)		(8,456	)		(2,081	)		(284	)		0			(270	)		(16,757	)
Recoveries		50			656			4,516			849			52			0			0			6,123
Provision		1,028			4,340			3,626			1,292			(60	)		449			309			10,984
Balance at December 31, 2017	$	10,465		$	17,257		$	13,468		$	3,039		$	2,107		$	1,100		$	147		$	47,583

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PREMISES AND EQUIPMENT

12 Months Ended

Dec. 31, 2017

PREMISES AND EQUIPMENT [Abstract]

PREMISES AND EQUIPMENT

NOTE E: PREMISES AND EQUIPMENT

Premises and equipment consist of the following at December 31:

(000's omitted)	2017			2016
Land and land improvements	$	23,869		$	22,585
Bank premises		131,647			116,663
Equipment and construction in progress		86,059			80,527
Premises and equipment, gross		241,575			219,775
Accumulated depreciation		(118,182	)		(107,457	)
Premises and equipment, net	$	123,393		$	112,318

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GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS

12 Months Ended

Dec. 31, 2017

GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS [Abstract]

GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS

NOTE F: GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS

The gross carrying amount and accumulated amortization for each type of identifiable intangible asset are as follows:

	December 31, 2017							December 31, 2016
(000's omitted)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Amortizing intangible assets:
Core deposit intangibles	$	62,902	$	(37,877	)	$	25,025	$	39,688	$	(32,581	)	$	7,107
Other intangibles		86,535		(20,902	)		65,633		17,853		(9,258	)		8,595
Total amortizing intangibles	$	149,437	$	(58,779	)	$	90,658	$	57,541	$	(41,839	)	$	15,702

The estimated aggregate amortization expense for each of the five succeeding fiscal years ended December 31 is as follows:

2018	$	17,872
2019		15,033
2020		12,497
2021		10,665
2022		9,165
Thereafter		25,426
Total	$	90,658

Shown below are the components of the Company’s goodwill at December 31, 2017 and 2016:

(000’s omitted)	Year Ended December 31, 2015			Activity		Year Ended December 31, 2016			Activity		Year Ended December 31, 2017
Goodwill	$	468,076		$	1,890	$	469,966		$	269,288	$	739,254
Accumulated impairment		(4,824	)		0		(4,824	)		0		(4,824	)
Goodwill, net	$	463,252		$	1,890	$	465,142		$	269,288	$	734,430

During the first quarter of 2017, the Company performed its annual internal valuation of goodwill and impairment analysis by comparing the fair value of each reporting unit to its carrying value.  Results of the valuations indicate there was no goodwill impairment.

Mortgage Servicing Rights

Under certain circumstances, the Company sells consumer residential mortgage loans in the secondary market and typically retains the right to service the loans sold.  Generally, the Company’s residential mortgage loans sold to third parties are sold on a non-recourse basis.  Upon sale, a mortgage servicing right (“MSR”) is established, which represents the current fair value of future net cash flows expected to be realized for performing the servicing activities.  The Company stratifies these assets based on predominant risk characteristics, namely expected term of the underlying financial instruments, and uses a valuation model that calculates the present value of future cash flows to determine the fair value of servicing rights. MSRs are recorded in other assets at the lower of the initial capitalized amount, net of accumulated amortization or fair value.  Mortgage loans serviced for others are not included in the accompanying consolidated statements of condition.

The following table summarizes the changes in carrying value of MSRs and the associated valuation allowance:

(000’s omitted)	2017			2016
Carrying value before valuation allowance at beginning of period	$	1,435		$	1,472
Additions		358			481
Merchants acquisition		64			0
Amortization		(499	)		(518	)
Carrying value before valuation allowance at end of period		1,358			1,435
Valuation allowance balance at beginning of period		0			0
Impairment charges		0			(226	)
Impairment recoveries		0			226
Valuation allowance balance at end of period		0			0
Net carrying value at end of period	$	1,358		$	1,435
Fair value of MSRs at end of period	$	2,473		$	1,928
Principal balance of loans sold during the year	$	32,937		$	45,852
Principal balance of loans serviced for others	$	358,518		$	365,374
Custodial escrow balances maintained in connection with loans serviced for others	$	5,363		$	5,603

The following table summarizes the key economic assumptions used to estimate the value of the MSRs at December 31:

	2017			2016
Weighted-average contractual life (in years)		21.3			20.8
Weighted-average constant prepayment rate (CPR)		11.1	%		15.1	%
Weighted-average discount rate		3.3	%		3.5	%

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DEPOSITS

12 Months Ended

Dec. 31, 2017

DEPOSITS [Abstract]

DEPOSITS

NOTE G: DEPOSITS

Deposits consist of the following at December 31:

(000's omitted)	2017		2016
Noninterest checking	$	2,293,057	$	1,646,039
Interest checking		1,830,914		1,644,029
Savings		1,421,512		1,303,851
Money market		2,124,633		1,778,907
Time		774,304		703,128
Total deposits	$	8,444,420	$	7,075,954

The approximate maturities of time deposits at December 31, 2017 are as follows:

(000's omitted)	All Accounts		Accounts $250,000 or Greater
2018	$	545,389	$	51,875
2019		100,833		5,958
2020		59,849		7,445
2021		34,582		1,807
2022		33,400		601
Thereafter		251		0
Total	$	774,304	$	67,686

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BORROWINGS

12 Months Ended

Dec. 31, 2017

BORROWINGS [Abstract]

BORROWINGS

NOTE H: BORROWINGS

Outstanding borrowings at December 31 are as follows:

(000's omitted)	2017		2016
FHLB overnight advance	$	24,000	$	146,200
Subordinated debt held by unconsolidated subsidiary trusts,
net of discount of $332 and $357, respectively		122,814		102,170
Securities sold under agreement to repurchase, short term		337,011		0
FHLB Long term advances		2,071		0
Total borrowings	$	485,896	$	248,370

FHLB advances are collateralized by a blanket lien on the Company's residential real estate loan portfolio and various investment securities.

Borrowings at December 31, 2017 have contractual maturity dates as follows:

(000's omitted, except rate)	Carrying Value		Weighted-average Rate at December 31, 2017
January 2, 2018	$	361,011		0.54	%
July 3, 2023		601		2.25	%
October 23, 2023		515		1.50	%
October 1, 2025		329		1.50	%
March 1, 2029		626		2.50	%
July 31, 2031		24,875		4.96	%
December 15, 2034		20,619		3.54	%
December 15, 2036		77,320		3.24	%
Total	$	485,896		1.34	%

The weighted-average interest rate on borrowings for the years ended December 31, 2017 and 2016 was 1.51% and 1.46%, respectively.

The Company sponsors three business trusts, Community Statutory Trust III (“CST III”), Community Capital Trust IV (“CCT IV”) and MBVT Statutory Trust I (“MBVT I”), of which 100% of the common stock is owned by the Company.  The common stock of MBVT Statutory Trust I was acquired in the Merchants acquisition.  The trusts were formed for the purpose of issuing company-obligated mandatorily redeemable preferred securities to third-party investors and investing the proceeds from the sale of such preferred securities solely in junior subordinated debt securities of the Company.  The debentures held by each trust are the sole assets of such trust.  Distributions on the preferred securities issued by each trust are payable quarterly at a rate per annum equal to the interest rate being earned by the trust on the debentures held by that trust and are recorded as interest expense in the consolidated financial statements.  The preferred securities are subject to mandatory redemption, in whole or in part, upon repayment of the debentures.  The Company has entered into agreements which, taken collectively, fully and unconditionally guarantee the preferred securities subject to the terms of each of the guarantees.  The terms of the preferred securities of each trust are as follows:

Trust	Issuance Date	Par Amount	Interest Rate	Maturity Date	Call Price
CST III	7/31/2001	$24.5 million	3 month LIBOR plus 3.58% (4.96%)	7/31/2031	Par
CCT IV	12/8/2006	$75.0 million	3 month LIBOR plus 1.65% (3.24%)	12/15/2036	Par
MBVT I	12/15/2004	$20.6 million	3 month LIBOR plus 1.95% (3.54%)	12/15/2034	Par

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INCOME TAXES

12 Months Ended

Dec. 31, 2017

INCOME TAXES [Abstract]

INCOME TAXES

NOTE I: INCOME TAXES

The provision for income taxes for the years ended December 31 is as follows:

(000's omitted)	2017			2016		2015
Current:
Federal	$	31,152		$	32,829	$	27,663
State and other		6,788			4,890		2,608
Deferred:
Federal		(28,146	)		11,444		9,604
State and other		(546	)		1,622		1,112
Provision for income taxes	$	9,248		$	50,785	$	40,987

Components of the net deferred tax liability, included in other liabilities, as of December 31 are as follows:

(000's omitted)	2017			2016
Allowance for loan losses	$	11,675		$	18,366
Employee benefits		4,216			6,311
Debt extinguishment		0			299
Other, net		0			5,202
Deferred tax asset		15,891			30,178
Investment securities		22,690			32,839
Tax-deductible goodwill		39,154			43,504
Loan origination costs		6,109			8,228
Depreciation		2,372			71
Mortgage servicing rights		330			548
Pension		13,228			18,194
Other, net		542			0
Deferred tax liability		84,425			103,384
Net deferred tax liability	$	(68,534	)	$	(73,206	)

The Company has determined that no valuation allowance is necessary as it is more likely than not that the gross deferred tax assets will be realized through carryback of future deductions to taxable income in prior years, future reversals of existing temporary differences, and through future taxable income.

A reconciliation of the differences between the federal statutory income tax rate and the effective tax rate for the years ended December 31 is shown in the following table:

	2017			2016			2015
Federal statutory income tax rate		35.0	%		35.0	%		35.0	%
Increase (reduction) in taxes resulting from:
Tax-exempt interest		(3.8	)		(4.0	)		(5.0	)
State income taxes, net of federal benefit		2.5			2.7			1.8
Stock-based compensation		(2.0	)		0			0
Federal deferred tax revaluation adjustment		(23.7	)		0			0
Other, net		(2.2	)		(0.9	)		(0.8	)
Effective income tax rate		5.8	%		32.8	%		31.0	%

A reconciliation of the unrecognized tax benefits for the years ended December 31 is shown in the following table:

(000’s omitted)	2017			2016			2015
Unrecognized tax benefits at beginning of year	$	92		$	127		$	162
Changes related to:
Lapse of statutes of limitations		(68	)		(35	)		(35	)
Unrecognized tax benefits at end of year	$	24		$	92		$	127

As of December 31, 2017, the total amount of unrecognized tax benefits that would impact the Company’s effective tax rate if recognized is $0.02 million.  It is reasonably possible that the amount of unrecognized tax benefits could change in the next twelve months as a result of various examinations and expiration of statutes of limitations on prior tax returns.

The Company’s policy is to recognize interest and penalties related to unrecognized tax benefits as part of income taxes in the consolidated statement of income.  The accrued interest related to tax positions was immaterial.

The Company’s federal and state income tax returns are routinely subject to examination from various governmental taxing authorities.  Such examinations may result in challenges to the tax return treatment applied by the Company to specific transactions.  Management believes that the assumptions and judgment used to record tax-related assets or liabilities have been appropriate.  Future examinations by taxing authorities of the Company’s federal or state tax returns could have a material impact on the Company’s results of operations.  The Company’s federal income tax returns for years after 2013 may still be examined by the Internal Revenue Service.  New York State income tax returns for years after 2012 may still be examined by the New York Department of Taxation and Finance.  It is not possible to estimate, if and when those examinations may be completed.

On December 22, 2017, H.R.1, referred to as the “Tax Cuts and Jobs Act,” was signed into law.  Among other things, the Tax Cuts and Jobs Act permanently lowers the corporate tax rate to 21% from the existing maximum rate of 35%, effective for tax years including or commencing January 1, 2018.  ASC 740, Income Taxes, requires existing deferred tax assets and liabilities to be measured at the enacted tax rate expected to be applied when the temporary differences are to be realized or settled. Thus, as of the date of enactment, deferred taxes were re-measured based upon the new 21% tax rate.  Prior to the change in tax rate, the Company had recorded net deferred tax liabilities based on a marginal tax rate of 37.70%.  The change in tax rate resulted in a decrease in the marginal tax rate to 24.29% and a deferred tax benefit of $38.0 million from the write-down of the net deferred tax liabilities. The effect of this change in tax law was recorded as a component of the income tax provision including those deferred assets and liabilities that were established through a financial statement component other than continuing operations.

On December 22, 2017, the SEC staff issued Staff Accounting Bulletin No. 118 (“SAB 118”), which provided guidance on reporting accounting impacts of the recently enacted tax reform legislation.  In SAB 118, it is noted that reporting companies may be unable to complete the accounting for certain income tax effects of the Tax Cuts and Jobs Act by the time financial statements are issued for the reporting period in which the Tax Cuts and Jobs Act was enacted (the “Enactment Period”). SAB 118 provides guidance for the scenarios in which a company does not have the necessary information available, prepared or analyzed to complete the accounting for certain income tax effects when it issues financial statements covering the Enactment Period.  In those cases, SAB 118 would permit the company to provide “reasonable estimates” for the income tax effects of the Tax Cuts and Jobs Act and to report those effects as “provisional amounts” in its financial statements during a limited “measurement period.”

Based on the review of its deferred tax assets and liabilities, the Company notes that the accounting for the enactment of the Tax Cuts and Jobs Act is complete and the effects have been appropriately reflected in the consolidated statement of condition as of December 31, 2017 and the consolidated statement of income for the year ended December 31, 2017.

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LIMITS ON DIVIDENDS AND OTHER REVENUE SOURCES

12 Months Ended

Dec. 31, 2017

LIMITS ON DIVIDENDS AND OTHER REVENUE SOURCES [Abstract]

LIMITS ON DIVIDENDS AND OTHER REVENUE SOURCES

NOTE J: LIMITS ON DIVIDENDS AND OTHER REVENUE SOURCES

The Company’s ability to pay dividends to its shareholders is largely dependent on the Bank’s ability to pay dividends to the Company.  In addition to the capital requirements discussed below, the circumstances under which the Bank may pay dividends are limited by federal statutes, regulations, and policies.  For example, as a national bank, the Bank must obtain the approval of the Office of the Comptroller of the Currency (“OCC”) for payments of dividends if the total of all dividends declared in any calendar year would exceed the total of the Bank’s net profits, as defined by applicable regulations, for that year, combined with its retained net profits for the preceding two years.  Furthermore, the Bank may not pay a dividend in an amount greater than its undivided profits then on hand after deducting its losses and bad debts, as defined by applicable regulations.  At December 31, 2017, the Bank had approximately $69.0 million in undivided profits legally available for the payment of dividends.

In addition, the Board of Governors of the Federal Reserve System (“FRB”) and the OCC are authorized to determine under certain circumstances that the payment of dividends would be an unsafe or unsound practice and to prohibit payment of such dividends.  The FRB has indicated that banking organizations should generally pay dividends only out of current operating earnings.

There are also statutory limits on the transfer of funds to the Company by its banking subsidiary, whether in the form of loans or other extensions of credit, investments or assets purchases.  Such transfer by the Bank to the Company generally is limited in amount to 10% of the Bank’s capital and surplus, or 20% in the aggregate.  Furthermore, such loans and extensions of credit are required to be collateralized in specific amounts.

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BENEFIT PLANS

12 Months Ended

Dec. 31, 2017

BENEFIT PLANS [Abstract]

BENEFIT PLANS

NOTE K: BENEFIT PLANS

Pension and post-retirement plans

The Company provides a qualified defined benefit pension to eligible employees and retirees, other post-retirement health and life insurance benefits to certain retirees, an unfunded supplemental pension plan for certain key executives, and an unfunded stock balance plan for certain of its nonemployee directors.  Using a measurement date of December 31, the following table shows the funded status of the Company's plans reconciled with amounts reported in the Company's consolidated statements of condition:

	Pension Benefits						Post-retirement Benefits
(000's omitted)	2017			2016			2017			2016
Change in benefit obligation:
Benefit obligation at the beginning of year	$	127,084		$	127,134		$	1,806		$	1,918
Service cost		4,181			4,106			0			0
Interest cost		5,717			5,624			76			82
Plan amendment / acquisition		11,646			22			0			0
Participant contributions		0			0			467			516
Deferred actuarial loss/(gain)		8,978			(1,628	)		245			174
Benefits paid		(10,156	)		(8,174	)		(809	)		(884	)
Benefit obligation at end of year		147,450			127,084			1,785			1,806
Change in plan assets:
Fair value of plan assets at beginning of year		180,400			172,026			0			0
Actual return of plan assets		22,954			14,402			0			0
Participant contributions		0			0			467			516
Employer contributions		9,839			2,146			342			368
Plan acquisition		14,070			0			0			0
Benefits paid		(10,156	)		(8,174	)		(809	)		(884	)
Fair value of plan assets at end of year		217,107			180,400			0			0
Over/(Under) funded status at year end	$	69,657		$	53,316		$	(1,785	)	$	(1,806	)
Amounts recognized in the consolidated statement of condition were:
Other assets	$	81,000		$	64,709		$	0		$	0
Other liabilities		(11,343	)		(11,393	)		(1,785	)		(1,806	)
Amounts recognized in accumulated other comprehensive income (loss) (“AOCI”) were:
Net loss	$	26,935		$	28,323		$	420		$	183
Net prior service cost (credit)		2,944			2,264			(1,622	)		(1,801	)
Pre-tax AOCI		29,879			30,587			(1,202	)		(1,618	)
Taxes		(7,340	)		(11,622	)		296			614
AOCI at year end	$	22,539		$	18,965		$	(906	)	$	(1,004	)

The benefit obligation for the defined benefit pension plan was $136.1 million and $115.7 million as of December 31, 2017 and 2016, respectively, and the fair value of plan assets as of December 31, 2017 and 2016 was $217.1 million and $180.4 million, respectively.  Effective May 12, 2017, the Merchants Bank Pension Plan was merged into the Community Bank System, Inc. Pension Plan and the combined plan was revalued resulting in an additional unamortized actuarial gain of approximately $1.9 million, due primarily to a gain on plan assets that was partially offset by a decrease in the discount rate from 4.50% to 4.40% as of the valuation date.

The Company has unfunded supplemental pension plans for certain key active and retired executives.  The projected benefit obligation for the unfunded supplemental pension plan for certain key executives was $11.3 million for 2017 and 2016.  The Company also has an unfunded stock balance plan for certain of its nonemployee directors.  The projected benefit obligation for the unfunded stock balance plan was $0.1 million for 2017 and 2016.  The plan was frozen effective December 31, 2009.

Effective December 31, 2009, the Company terminated its post-retirement medical program for current and future employees.  Remaining plan participants will include only existing retirees as of December 31, 2010.  This change was accounted for as a negative plan amendment and a $3.5 million, net of income taxes, benefit for prior service was recognized in AOCI in 2009.  This negative plan amendment is being amortized over the expected benefit utilization period of remaining plan participants.

Amounts recognized in accumulated other comprehensive income, net of tax, for the year ended December 31, are as follows:

	Pension Benefits						Post-retirement Benefits
(000's omitted)	2017			2016			2017		2016
Prior service cost/(credit)	$	424		$	(26	)	$	111	$	110
Net (gain) loss		(851	)		(3,517	)		148		111
Total	$	(427	)	$	(3,543	)	$	259	$	221

The estimated costs, net of tax, that will be amortized from accumulated other comprehensive (income) loss into net periodic (income) cost over the next fiscal year are as follows:

(000's omitted)	Pension Benefits			Post-retirement Benefits
Prior service credit	$	(330	)	$	(179	)
Net loss		1,054			18
Total	$	724		$	(161	)

The weighted-average assumptions used to determine the benefit obligations as of December 31 are as follows:

	Pension Benefits						Post-retirement Benefits
	2017			2016			2017			2016
Discount rate		4.00	%		4.50	%		4.00	%		4.40	%
Expected return on plan assets		7.00	%		7.00	%		N/A			N/A
Rate of compensation increase		3.50	%		3.50	%		N/A			N/A

The net periodic benefit cost as of December 31 is as follows:

	Pension Benefits									Post-retirement Benefits
(000's omitted)	2017			2016			2015			2017			2016			2015
Service cost	$	4,181		$	4,106		$	3,324		$	0		$	0		$	0
Interest cost		5,717			5,624			5,506			76			82			87
Expected return on plan assets		(13,354	)		(11,842	)		(12,169	)		0			0			0
Plan amendment		0			20			0			0			0			0
Amortization of unrecognized net loss/(gain)		767			1,508			1,466			8			(5	)		(13	)
Amortization of prior service cost		55			43			8			(179	)		(179	)		(179	)
Net periodic (benefit)	$	(2,634	)	$	(541	)	$	(1,865	)	$	(95	)	$	(102	)	$	(105	)

Prior service costs in which all or almost all of the plan’s participants are fully eligible for benefits under the plan are amortized on a straight-line basis over the expected future working years of all active plan participants.  Unrecognized gains or losses are amortized using the “corridor approach”, which is the minimum amortization required. Under the corridor approach, the net gain or loss in excess of 10 percent of the greater of the projected benefit obligation or the market-related value of the assets is amortized on a straight-line basis over the expected future working years of all active plan participants.

The weighted-average assumptions used to determine the net periodic pension cost for the years ended December 31 are as follows:

	Pension Benefits									Post-retirement Benefits
	2017			2016			2015			2017			2016			2015
Discount rate		4.40	%		4.70	%		4.50	%		4.40	%		4.70	%		4.50	%
Expected return on plan assets		7.00	%		7.00	%		7.00	%		N/A			N/A			N/A
Rate of compensation increase		3.50	%		3.50	%		3.50	%		N/A			N/A			N/A

The amount of benefit payments that are expected to be paid over the next ten years are as follows:

(000's omitted)	Pension Benefits		Post-retirement Benefits
2018	$	8,702	$	145
2019		9,163		142
2020		9,404		139
2021		9,943		136
2022		10,378		133
2023-2027		56,064		618

The payments reflect future service and are based on various assumptions including retirement age and form of payment (lump-sum versus annuity). Actual results may differ from these estimates.

The assumed discount rate is used to reflect the time value of future benefit obligations.  The discount rate was determined based upon the yield on high-quality fixed income investments expected to be available during the period to maturity of the pension benefits.  This rate is sensitive to changes in interest rates.  A decrease in the discount rate would increase the Company’s obligation and future expense while an increase would have the opposite effect.   The expected long-term rate of return was estimated by taking into consideration asset allocation, reviewing historical returns on the type of assets held and current economic factors.  Based on the Company’s anticipation of future experience under the defined benefit pension plan, the mortality tables used to determine future benefit obligations under the plan were updated as of December 31, 2017 to the RP-2014 Mortality Table for annuitants and non-annuitants, adjusted backward to 2006 with Scale MP-2014, and then adjusted for mortality improvements with the Scale MP-2016 mortality improvement scale on a fully generational basis.  The appropriateness of the assumptions is reviewed annually.

Plan Assets

The investment objective for the defined benefit pension plan is to achieve an average annual total return over a five-year period equal to the assumed rate of return used in the actuarial calculations.  At a minimum performance level, the portfolio should earn the return obtainable on high quality intermediate-term bonds.  The Company’s perspective regarding portfolio assets combines both preservation of capital and moderate risk-taking.   Asset allocation favors equities, with a target allocation of approximately 60% equity securities and 40% fixed income securities and money market funds.  Due to the volatility in the market, the target allocation is not always desirable and asset allocations will fluctuate between acceptable ranges.  Prohibited transactions include purchase of securities on margin, uncovered call options, and short sale transactions.

The fair values of the Company’s defined benefit pension plan assets at December 31, 2017 by asset category are as follows:

Asset category (000’s omitted)	Quoted Prices in Active Markets for Identical Assets Level 1		Significant Observable Inputs Level 2		Significant Unobservable Inputs Level 3		Total
Money Market Accounts	$	0	$	10,381	$	0	$	10,381
Equity securities:
U.S. large-cap		53,154		0		0		53,154
U.S mid/small cap		26,309		0		0		26,309
CBU stock		8,344		0		0		8,344
International		47,723		0		0		47,723
		135,530		0		0		135,530
Fixed income securities:
Government securities		13,929		9,686		0		23,615
Investment grade bonds		19,278		0		0		19,278
High yield(a)		16,297		0		0		16,297
		49,504		9,686		0		59,190
Other investments (b)		11,302		73		0		11,375
Total (c)	$	196,336	$	20,140	$	0	$	216,476

The fair values of the Company’s defined benefit pension plan assets at December 31, 2016 by asset category are as follows:

Asset category (000’s omitted)	Quoted Prices in Active Markets for Identical Assets Level 1		Significant Observable Inputs Level 2		Significant Unobservable Inputs Level 3		Total
Money Market Accounts	$	103	$	8,048	$	0	$	8,151
Equity securities:
U.S. large-cap		43,235		0		0		43,235
U.S mid/small cap		19,032		0		0		19,032
CBU stock		7,417		0		0		7,417
International		27,064		0		0		27,064
		96,748		0		0		96,748
Fixed income securities:
Government securities		25,375		5,863		0		31,238
Investment grade bonds		15,253		0		0		15,253
High yield(a)		16,615		0		0		16,615
		57,243		5,863		0		63,106
Other investments (b)		12,023		58		0		12,081
Total (c)	$	166,117	$	13,969	$	0	$	180,086

(a)	This category is exchange-traded funds representing a diversified index of high yield corporate bonds.
(b)	This category is comprised of exchange-traded funds and mutual funds holding non-traditional investment classes including private equity funds and alternative exchange funds.
(c)	Excludes dividends and interest receivable totaling $0.6 million and $0.3 million at December 31, 2017 and 2016, respectively.

The valuation techniques used to measure fair value for the items in the table above are as follows:

· Money market funds - Managed portfolios, including commercial paper and other fixed income securities issued by U.S. and foreign corporations, asset-backed commercial paper, U.S. government securities, obligations of foreign governments and U.S. and foreign banks, which are valued at the closing price reported on the market on which the underlying securities are traded.

· Equity securities and other investments – Mutual funds, equity securities and common stock of the Company which are valued at the quoted market price of shares held at year-end.

· Fixed income securities - U.S. Treasuries, municipal bonds and notes, government sponsored entities, and corporate debt valued at the closing price reported on the active market on which the individual securities are traded or for municipal bonds and notes based on quoted prices for similar assets in the active market.

The Company makes contributions to its funded qualified pension plan as required by government regulation or as deemed appropriate by management after considering the fair value of plan assets, expected return on such assets, and the value of the accumulated benefit obligation.  The Company made a $2.0 million contribution to the Merchants Bank Pension Plan in 2017.  The Company made a $7.2 million contribution to its defined benefit pension plan in 2017.  The Company funds the payment of benefit obligations for the supplemental pension and post-retirement plans because such plans do not hold assets for investment.

Tupper Lake National Bank (“TLNB”), acquired in 2007, participated in the Pentegra Defined Benefit Plan for Financial Institutions (“Pentegra DB Plan”), a multi-employer tax qualified defined benefit pension plan.  The identification number and plan number of the Pentegra DB Plan are 13-5645888 and 333, respectively.  All employees of TLNB who met minimum service requirements participated in the plan.  As of June 30, 2016, the Pentegra DB Plan had total assets of $3.3 billion, actuarial present value of accumulated benefits of $4.8 billion and was at least 80 percent funded.  The assets of the multi-employer plan may be used to satisfy obligations of any of the employers participating in the plan.  As a result, contributions made by the Company may be used to provide benefits to participants of other participating employers.  Contributions for 2017, 2016 and 2015 were approximately $0.1 million, $0.05 million, and $0.03 million, respectively. Contributions made by the Company to the Pentegra DB Plan do not represent more than 5% of contributions made to the Pentegra DB Plan.

The assumed health care cost trend rate used in the post-retirement health plan at December 31, 2017 was 7.25% for the pre-65 participants and 5.00% for the post-65 participants for medical costs and 10.5% for prescription drugs.  The rate to which the cost trend rate is assumed to decline (the ultimate trend rate) and the year that the rate reaches the ultimate trend rate is 3.89% and 2075, respectively.

Assumed health care cost trend rates impact the amounts reported for the health care plan.  A one-percentage-point increase or decrease in the trend rate would increase the service and interest cost components by nominal amounts.

401(k) Employee Stock Ownership Plan

The Company has a 401(k) Employee Stock Ownership Plan in which employees can contribute from 1% to 90% of eligible compensation, with the first 3% being eligible for a 100% matching contribution in the form of Company common stock and the next 3% being eligible for a 50% matching contributions in the form of Company common stock.  The expense recognized under this plan for the years ended December 31, 2017, 2016 and 2015 was $5.3 million, $4.3 million, and $3.6 million, respectively.  Effective January 1, 2010, the defined benefit pension plan was modified to a new plan design that includes an interest credit contribution to be made to the 401(k) plan.  The expense recognized for this interest credit contribution for the years ended December 31, 2017, 2016, and 2015 was $0.8 million, $0.7 million, and $1.1 million, respectively.

The Company acquired The Merchants Bank 401(k) ESOP Plan with the Merchants acquisition and The Gordon B. Roberts 401(k) Plan with the GBR acquisition.  Effective January 1, 2018, The Merchants Bank 401(k) ESOP Plan and The Gordon B. Roberts 401(k) Plan were merged into and became part of the Community Bank System, Inc. 401(k) Employee Stock Ownership Plan.

Other Deferred Compensation Arrangements

In addition to the supplemental pension plans for certain executives, the Company has nonqualified deferred compensation arrangements for several former directors, officers and key employees.  All benefits provided under these plans are unfunded and payments to plan participants are made by the Company.  At December 31, 2017 and 2016, the Company has recorded a liability of $3.1 million and $3.2 million, respectively.  The expense recognized under these plans for the years ended December 31, 2017, 2016, and 2015 was approximately $0.3 million, $0.03 million, and $0.1 million, respectively.

Deferred Compensation Plans for Directors

Directors of the Company may defer all or a portion of their director fees under the Deferred Compensation Plan for Directors.  Under this plan, there is a separate account for each participating director which is credited with the amount of shares that could have been purchased with the director’s fees as well as any dividends on such shares.  On the distribution date, the director will receive common stock equal to the accumulated share balance in their account.  As of December 31, 2017 and 2016, there were 150,110 and 154,013 shares credited to the participants’ accounts, for which a liability of $4.2 million and $4.0 million was accrued, respectively.  The expense recognized under the plan for the years ended December 31, 2017, 2016 and 2015, was $0.2 million, $0.2 million, and $0.2 million, respectively.

The Company acquired deferred compensation plans for certain non-employee directors and trustees of Merchants.  Under the terms of these acquired deferred compensation plans, participating directors could elect to have all, or a specified percentage, of their Merchants director’s fees for a given year paid in the form of cash or deferred in the form of restricted shares of Merchants’ common stock.  Directors who elected to have their compensation deferred were credited with a number of shares of Merchants’ common stock equal in value to the amount of fees deferred.  These shares were converted to shares of Company stock in connection with the acquisition and are held in a rabbi trust.  The shares held in the rabbi trust are considered outstanding for purposes of computing earnings per share.  The participating director may not sell, transfer or otherwise dispose of these shares prior to distribution. With respect to shares of common stock issued or otherwise transferred to a participating director, the participating director has the right to receive dividends or other distributions thereon.

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STOCK-BASED COMPENSATION PLANS

12 Months Ended

Dec. 31, 2017

STOCK-BASED COMPENSATION PLANS [Abstract]

STOCK-BASED COMPENSATION PLANS

NOTE L: STOCK-BASED COMPENSATION PLANS

The Company has a long-term incentive program for directors, officers and employees.  Under this program, the Company initially authorized four million shares of Company common stock for the grant of incentive stock options, nonqualified stock options, restricted stock awards, and retroactive stock appreciation rights.  The long-term incentive program was amended effective May 25, 2011, May 14, 2014 and May 17, 2017 to authorize an additional 900,000 shares, 1,000,000 shares and 1,000,000 shares of Company common stock, respectively, for the grant of incentive stock options, nonqualified stock options, restricted stock awards, and retroactive stock appreciation rights.  As of December 31, 2017, the Company has authorization to grant up to approximately 1.7 million additional shares of Company common stock for these instruments.  The nonqualified (offset) stock options in its Director’s Stock Balance Plan vest and become exercisable immediately and expire one year after the date the director retires or two years in the event of death.  The remaining options have a ten-year term, and vest and become exercisable on a grant-by-grant basis, ranging from immediate vesting to ratably over a five-year period.

Activity in this long-term incentive program is as follows:

	Stock Options
	Outstanding			Weighted- average Exercise Price of Shares
Outstanding at December 31, 2015		1,969,301		$	28.15
Granted		330,383			38.02
Exercised		(525,298	)		25.12
Forfeited		(18,394	)		34.47
Outstanding at December 31, 2016		1,755,992			30.85
Granted		197,943			57.02
Exercised		(238,499	)		25.72
Forfeited		(7,140	)		37.47
Outstanding at December 31, 2017		1,708,296			34.57
Exercisable at December 31, 2017		1,015,823		$	29.57

The following table summarizes the information about stock options outstanding under the Company’s stock option plan at December 31, 2017:

		Options outstanding						Options exercisable
Range of Exercise Price		Shares		Weighted- average Exercise Price		Weighted- average Remaining Life (years)		Shares		Weighted average Exercise Price
$	0.00 – $18.00		24,736	$	17.82		1.31		24,736	$	17.82
$	18.001 – $28.00		314,511		22.23		2.93		314,511		22.23
$	28.001 – $29.00		171,083		28.78		4.22		171,083		28.78
$	29.001 – $30.00		228,668		29.79		5.20		176,843		29.79
$	30.001 – $40.00		771,781		37.09		7.28		317,005		37.06
$	40.001 – $60.00		197,517		57.02		9.14		11,645		57.12
TOTAL			1,708,296	$	34.57		6.02		1,015,823	$	29.57

The weighted-average remaining contractual term of outstanding and exercisable stock options at December 31, 2017 is 6.02 years and 4.85 years, respectively.  The aggregate intrinsic value of outstanding and exercisable stock options at December 31, 2017 is $33.4 million and $24.6 million, respectively.

The Company recognized stock-based compensation expense related to non-qualified stock options of $2.2 million, $2.2 million and $1.8 million for the years ended December 31, 2017, 2016 and 2015, respectively.  A related income tax benefit was recognized of $0.8 million, $0.8 million and $0.7 million for the 2017, 2016 and 2015 years, respectively.  Compensation expense related to restricted stock vesting recognized in the income statement for 2017, 2016 and 2015 was approximately $2.7 million, $2.4 million and $2.2 million, respectively.

Management estimated the fair value of options granted using the Black-Scholes option-pricing model.  This model was originally developed to estimate the fair value of exchange-traded equity options, which (unlike employee stock options) have no vesting period or transferability restrictions.  As a result, the Black-Scholes model is not necessarily a precise indicator of the value of an option, but it is commonly used for this purpose.  The Black-Scholes model requires several assumptions, which management developed based on historical trends and current market observations.

	2017			2016			2015
Weighted-average Fair Value of Options Granted	$	12.78		$	7.90		$	7.48
Assumptions:
Weighted-average expected life (in years)		6.50			6.50			6.50
Future dividend yield		3.19	%		3.43	%		3.40	%
Share price volatility		29.71	%		30.00	%		30.34	%
Weighted-average risk-free interest rate		2.31	%		1.72	%		1.73	%

Unrecognized stock-based compensation expense related to non-vested stock options totaled $4.6 million at December 31, 2017.  The weighted-average period over which this unrecognized expense would be recognized is 3.2 years.  The total fair value of stock options vested during 2017, 2016, and 2015 were $2.2 million, $2.1 million and $1.9 million, respectively.

During the 12 months ended December 31, 2017 and 2016, proceeds from stock option exercises totaled $7.7 million and $12.0 million, respectively, and the related tax benefits from exercise were approximately $2.3 million and $2.7 million, respectively.   During the twelve months ended December 31, 2017 and 2016, approximately 0.2 million and 0.4 million shares, respectively, were issued in connection with stock option exercises each year.  The total intrinsic value of options exercised during 2017, 2016 and 2015 were $7.6 million, $10.3 million and $7.6 million, respectively.

A summary of the status of the Company’s unvested restricted stock awards as of December 31, 2017, and changes during the twelve months ended December 31, 2017 and 2016, is presented below:

	Restricted Shares			Weighted-average grant date fair value
Unvested at December 31, 2015		246,311		$	27.85
Awards		148,240			27.04
Forfeitures		(42,394	)		17.49
Vestings		(98,327	)		25.64
Unvested at December 31, 2016		253,830			29.98
Awards		46,428			57.02
Forfeitures		(4,863	)		24.78
Vestings		(64,522	)		33.69
Unvested at December 31, 2017		230,873		$	34.06

Unrecognized stock-based compensation expense related to unvested restricted stock totaled $5.7 million at December 31, 2017, which will be recognized as expense over the next five years.  The weighted-average period over which this unrecognized expense would be recognized is 4.3 years.  The total fair value of restricted stock vested during 2017, 2016, and 2015 were $2.2 million, $2.5 million and $1.7 million, respectively.

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EARNINGS PER SHARE

12 Months Ended

Dec. 31, 2017

EARNINGS PER SHARE [Abstract]

EARNINGS PER SHARE

NOTE M: EARNINGS PER SHARE

The two class method is used in the calculations of basic and diluted earnings per share.  Under the two class method, earnings available to common shareholders for the period are allocated between common shareholders and participating securities according to dividends declared and participation rights in undistributed earnings.  The Company has determined that all of its outstanding non-vested stock awards are participating securities as of December 31, 2017.

Basic earnings per share are computed based on the weighted-average of the common shares outstanding for the period.  Diluted earnings per share are based on the weighted-average of the shares outstanding and the assumed exercise of stock options during the year.  The dilutive effect of options is calculated using the treasury stock method of accounting.  The treasury stock method determines the number of common shares that would be outstanding if all the dilutive options (those where the average market price is greater than the exercise price) were exercised and the proceeds were used to repurchase common shares in the open market at the average market price for the applicable time period.  There were approximately 0.2 million, 0.3 million and 0.3 million weighted-average anti-dilutive stock options outstanding at December 31, 2017, 2016 and 2015, respectively, which were not included in the computation below.

The following is a reconciliation of basic to diluted earnings per share for the years ended December 31, 2017, 2016 and 2015.

(000's omitted, except per share data)	2017			2016			2015
Net income	$	150,717		$	103,812		$	91,230
Income attributable to unvested stock-based compensation awards		(597	)		(550	)		(453	)
Income available to common shareholders	$	150,120		$	103,262		$	90,777
Weighted-average common shares outstanding - basic		48,843			44,091			40,996
Basic earnings per share	$	3.07		$	2.34		$	2.21
Net income	$	150,717		$	103,812		$	91,230
Income attributable to unvested stock-based compensation awards		(597	)		(550	)		(453	)
Income available to common shareholders	$	150,120		$	103,262		$	90,777
Weighted-average common shares outstanding		48,843			44,091			40,996
Assumed exercise of stock options		627			394			405
Weighted-average common shares outstanding – diluted		49,470			44,485			41,401
Diluted earnings per share	$	3.03		$	2.32		$	2.19
Cash dividends declared per share	$	1.32		$	1.26		$	1.22

Stock Repurchase Program

At its December 2016 meeting, the Board approved a stock repurchase program authorizing the repurchase of up to 2.2 million shares of the Company’s common stock, in accordance with securities laws and regulations, through December 31, 2017.  At its December 2017 meeting, the Board approved a similar program for 2018, authorizing the repurchase of up to 2.5 million shares of the Company’s common stock through December 31, 2018.  Any repurchased shares will be used for general corporate purposes, including those related to stock plan activities.  The timing and extent of repurchases will depend on market conditions and other corporate considerations as determined at the Company’s discretion.  There were no stock repurchases pursuant to the announced plans in 2017 or 2016.  During 2015, the Company repurchased approximately 0.3 million shares of its common stock in open market transactions.

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COMMITMENTS, CONTINGENT LIABILITIES AND RESTRICTIONS

12 Months Ended

Dec. 31, 2017

COMMITMENTS, CONTINGENT LIABILITIES AND RESTRICTIONS [Abstract]

COMMITMENTS, CONTINGENT LIABILITIES AND RESTRICTIONS

NOTE N: COMMITMENTS, CONTINGENT LIABILITIES AND RESTRICTIONS

The Company is a party to financial instruments with off-balance-sheet risk in the normal course of business to meet the financing needs of its customers.  These financial instruments consist primarily of commitments to extend credit and standby letters of credit.  Commitments to extend credit are agreements to lend to customers, generally having fixed expiration dates or other termination clauses that may require payment of a fee.  These commitments consist principally of unused commercial and consumer credit lines.  Standby letters of credit generally are contingent upon the failure of the customer to perform according to the terms of an underlying contract with a third party.  The credit risks associated with commitments to extend credit and standby letters of credit are essentially the same as that involved with extending loans to customers and are subject to the Company’s normal credit policies.  Collateral may be obtained based on management’s assessment of the customer’s creditworthiness.  The fair value of the standby letters of credit is immaterial for disclosure.

The contract amounts of commitments and contingencies are as follows at December 31:

(000's omitted)	2017		2016
Commitments to extend credit	$	1,080,004	$	773,442
Standby letters of credit		23,782		22,656
Total	$	1,103,786	$	796,098

The Bank has unused lines of credit of $25.0 million at December 31, 2017.  The Bank has unused borrowing capacity of approximately $1.68 billion through collateralized transactions with the FHLB and $22.9 million through collateralized transactions with the Federal Reserve.

The Company is required to maintain a reserve balance, as established by the Federal Reserve.  The required average total reserve for the 14-day maintenance period of December 21, 2017 through January 3, 2018 was $84.8 million, with $73.2 million represented by cash on hand and the remaining $11.6 million was required to be on deposit with the Federal Reserve.

The Company and its subsidiaries are subject in the normal course of business to various pending and threatened legal proceedings in which claims for monetary damages are asserted. As of December 31, 2017, management, after consultation with legal counsel, does not anticipate that the aggregate ultimate liability arising out of litigation pending or threatened against the Company or its subsidiaries will be material to the Company’s consolidated financial position. On at least a quarterly basis the Company assesses its liabilities and contingencies in connection with such legal proceedings. For those matters where it is probable that the Company will incur losses and the amounts of the losses can be reasonably estimated, the Company records an expense and corresponding liability in its consolidated financial statements. To the extent the pending or threatened litigation could result in exposure in excess of that liability, the amount of such excess is not currently estimable. The range of reasonably possible losses for matters where an exposure is not currently estimable or considered probable, beyond the existing recorded liabilities, is between $0 and $1 million in the aggregate. Although the Company does not believe that the outcome of pending litigation will be material to the Company’s consolidated financial position, it cannot rule out the possibility that such outcomes will be material to the consolidated results of operations for a particular reporting period in the future.

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LEASES

12 Months Ended

Dec. 31, 2017

LEASES [Abstract]

LEASES

NOTE O: LEASES

The Company leases buildings, office space, and equipment under agreements that expire in various years.  Rental expense included in operating expenses amounted to $7.3 million, $5.8 million and $5.4 million in 2017, 2016 and 2015, respectively.  The future minimum rental commitments as of December 31, 2017 for all non-cancelable operating leases are as follows:

2018	$	9,189
2019		8,194
2020		6,603
2021		5,164
2022		4,101
Thereafter		8,623
Total	$	41,874

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REGULATORY MATTERS

12 Months Ended

Dec. 31, 2017

REGULATORY MATTERS [Abstract]

REGULATORY MATTERS

NOTE P: REGULATORY MATTERS

The Company and the Bank are subject to various regulatory capital requirements administered by federal banking agencies.  Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company’s financial statements.  Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and the Bank must meet specific capital guidelines that involve quantitative measures of the Company’s and the Bank’s assets, liabilities, and certain off-balance sheet items as calculated under regulatory accounting practices.  The Company’s and the Bank's capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors.  Management believes, as of December 31, 2017, that the Company and Bank meet all applicable capital adequacy requirements.

Basel III Transitional rules became effective for the Company on January 1, 2015 with all of the requirements being phased in over a multi-year schedule, and fully phased in by January 1, 2019.  Beginning in 2016, the Company and the Bank are required to maintain a “capital conservation buffer,” composed entirely of common equity Tier 1 capital, in addition to minimum risk-based capital ratios.  The required capital conservation buffer is 1.25% for 2017 and 0.625% for 2016.  Therefore, to satisfy both the minimum risk-based capital ratios and the capital conservation buffer in 2017, the Company and the Bank must maintain: (i) Common equity Tier 1 capital to total risk-weighted assets of at least 5.75%, (ii) Tier 1 capital to total risk-weighted assets of at least 7.25%, and (iii) Total capital (Tier 1 capital plus Tier 2 capital) to total risk-weighted assets of at least 9.25%.  To satisfy both the minimum risk-based capital ratios and the capital conservation buffer in 2016, the Company and the Bank must maintain: (i) Common equity Tier 1 capital to total risk-weighted assets of at least 5.125%, (ii) Tier 1 capital to total risk-weighted assets of at least 6.625%, and (iii) Total capital (Tier 1 capital plus Tier 2 capital) to total risk-weighted assets of at least 8.625%. As of December 31, 2017 and 2016, the amounts, ratios and requirements for the Company are presented below calculated under the Basel III Standardized Transitional Approach.  As of December 31, 2017, the OCC categorized the Company and Bank as “well capitalized” under the regulatory framework for prompt corrective action.

	Actual					For capital adequacy purposes					For capital adequacy purposes plus Capital Conservation Buffer					To be well-capitalized under prompt corrective action
(000’s omitted)	Amount		Ratio			Amount		Ratio			Amount		Ratio			Amount		Ratio
Community Bank System, Inc.:
2017
Tier 1 Leverage ratio	$	995,860		10.00	%	$	398,183		4.00	%						$	497,729		5.00	%
Tier 1 risk-based capital		995,860		16.64	%		358,988		6.00	%	$	433,777		7.25	%		478,651		8.00	%
Total risk-based capital		1,043,910		17.45	%		478,651		8.00	%		553,440		9.25	%		598,314		10.00	%
Common equity tier 1 capital		876,685		14.65	%		269,241		4.50	%		344,030		5.75	%		388,904		6.50	%

2016
Tier 1 Leverage ratio	$	858,347	10.55	%	$	325,438	4.00	%					$	406,798	5.00	%
Tier 1 risk-based capital		858,347	18.10	%		284,583	6.00	%	$	314,228	6.625	%		379,445	8.00	%
Total risk-based capital		905,996	19.10	%		379,445	8.00	%		409,089	8.625	%		474,306	10.00	%
Common equity tier 1 capital		759,199	16.01	%		213,438	4.50	%		243,082	5.125	%		308,299	6.50	%

Community Bank, N.A.:
2017
Tier 1 Leverage ratio	$	859,538	8.71	%	$	394,981	4.00	%					$	493,726	5.00	%
Tier 1 risk-based capital		859,538	14.50	%		355,641	6.00	%	$	429,733	7.25	%		474,188	8.00	%
Total risk-based capital		907,588	15.31	%		474,188	8.00	%		548,280	9.25	%		592,736	10.00	%
Common equity tier 1 capital		859,483	14.50	%		266,731	4.50	%		340,823	5.75	%		385,278	6.50	%

2016
Tier 1 Leverage ratio	$	672,633	8.30	%	$	324,080	4.00	%					$	405,099	5.00	%
Tier 1 risk-based capital		672,633	14.28	%		282,662	6.00	%	$	312,106	6.625	%		376,883	8.00	%
Total risk-based capital		720,282	15.29	%		376,883	8.00	%		406,327	8.625	%		471,104	10.00	%
Common equity tier 1 capital		672,578	14.28	%		211,997	4.50	%		241,441	5.125	%		306,217	6.50	%

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PARENT COMPANY STATEMENTS

12 Months Ended

Dec. 31, 2017

PARENT COMPANY STATEMENTS [Abstract]

PARENT COMPANY STATEMENTS

NOTE Q: PARENT COMPANY STATEMENTS

The condensed statements of condition of the parent company at December 31 are as follows:

(000's omitted)	2017		2016
Assets:
Cash and cash equivalents	$	84,460	$	151,127
Investment securities		4,322		3,628
Investment in and advances to:
Bank subsidiary		1,511,780		1,116,554
Non-bank subsidiaries		169,341		35,566
Other assets		9,150		10,345
Total assets	$	1,779,053	$	1,317,220
Liabilities and shareholders' equity:
Accrued interest and other liabilities	$	20,924	$	16,950
Borrowings		122,814		102,170
Shareholders' equity		1,635,315		1,198,100
Total liabilities and shareholders' equity	$	1,779,053	$	1,317,220

The condensed statements of income of the parent company for the years ended December 31 is as follows:

(000's omitted)	2017			2016			2015
Revenues:
Dividends from subsidiaries:
Bank subsidiary	$	91,000		$	89,000		$	70,000
Non-bank subsidiaries		35,500			1,750			6,000
Interest and dividends on investments		133			102			94
Total revenues		126,633			90,852			76,094
Expenses:
Interest on borrowings		3,904			2,949			2,537
Acquisition expenses		91			429			0
Other expenses		26			11			19
Total expenses		4,021			3,389			2,556
Income before tax benefit and equity in undistributed net income of subsidiaries		122,612			87,463			73,538
Income tax benefit/(expense)		1,930			866			(572	)
Income before equity in undistributed net income of subsidiaries		124,542			88,329			72,966
Equity in undistributed net income of subsidiaries		26,175			15,483			18,264
Net income	$	150,717		$	103,812		$	91,230
Other comprehensive (loss), net of tax:
Changes in other comprehensive income/(loss) related to pension and other post retirement obligations		168			3,322			(4,567	)
Changes in other comprehensive loss related to unrealized losses on available-for-sale securities		(11,065	)		(14,714	)		(6,918	)
Other comprehensive loss		(10,897	)		(11,392	)		(11,485	)
Comprehensive income	$	139,820		$	92,420		$	79,745

The statements of cash flows of the parent company for the years ended December 31 is as follows:

(000's omitted)	2017			2016			2015
Operating activities:
Net income	$	150,717		$	103,812		$	91,230
Adjustments to reconcile net income to net cash provided by operating activities
Equity in undistributed net income of subsidiaries		(26,175	)		(15,483	)		(18,264	)
Net change in other assets and other liabilities		1,870			(215	)		(27	)
Net cash provided by operating activities		126,412			88,114			72,939
Investing activities:
Proceeds from sale of investment securities		0			0			0
Cash (paid)/received for acquisitions, net of cash acquired of $150,534, $0, and $81,772, respectively		(139,471	)		0			25,505
Capital contributions to subsidiaries		(11,063	)		0			(80,231	)
Net cash used in investing activities		(150,534	)		0			(54,726	)
Financing activities:
Issuance of common stock		9,700			15,326			13,975
Purchase of treasury stock		(3,306	)		(3,470	)		(9,126	)
Sale of treasury stock		10,060			8,888			16,571
Increase in deferred compensation arrangements		3,306			0			0
Cash dividends paid		(62,305	)		(55,048	)		(49,273	)
Net cash used in financing activities		(42,545	)		(34,304	)		(27,853	)
Change in cash and cash equivalents		(66,667	)		53,810			(9,640	)
Cash and cash equivalents at beginning of year		151,127			97,317			106,957
Cash and cash equivalents at end of year	$	84,460		$	151,127		$	97,317
Supplemental disclosures of cash flow information:
Cash paid for interest	$	3,826		$	2,909		$	2,523
Supplemental disclosures of noncash financing activities
Dividends declared and unpaid	$	17,460		$	14,268		$	13,605
Capital contributions to subsidiaries		513,769			0			76,461
Common stock issued for acquisition		343,132			0			102,202

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FAIR VALUE

12 Months Ended

Dec. 31, 2017

FAIR VALUE [Abstract]

FAIR VALUE

NOTE R: FAIR VALUE

Accounting standards allow entities an irrevocable option to measure certain financial assets and financial liabilities at fair value.  Unrealized gains and losses on items for which the fair value option has been elected are reported in earnings.  The Company has elected to value mortgage loans held for sale at fair value in order to more closely match the gains and losses associated with loans held for sale with the gains and losses on forward sales contracts.  Accordingly, the impact on the valuation will be recognized in the Company’s consolidated statement of income.  All mortgage loans held for sale are current and in performing status.

Accounting standards establish a framework for measuring fair value and require certain disclosures about such fair value instruments.  It defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (i.e. exit price).  Inputs used to measure fair value are classified into the following hierarchy:

● Level 1 – Quoted prices in active markets for identical assets or liabilities.

· Level 2 – Quoted prices in active markets for similar assets or liabilities, or quoted prices for identical or similar assets or     liabilities in markets that are not active, or inputs other than quoted prices that are observable for the asset or liability.

· Level 3 – Significant valuation assumptions not readily observable in a market.

A financial instrument’s categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement.  The following tables set forth the Company’s financial assets and liabilities that were accounted for at fair value on a recurring basis.  There were no transfers between any of the levels for the periods presented.

	December 31, 2017
(000's omitted)	Level 1		Level 2			Level 3		Total Fair Value
Available-for-sale investment securities:
U.S. Treasury and agency securities	$	1,909,290	$	144,781		$	0	$	2,054,071
Obligations of state and political subdivisions		0		528,956			0		528,956
Government agency mortgage-backed securities		0		357,538			0		357,538
Corporate debt securities		0		2,623			0		2,623
Government agency collateralized mortgage obligations		0		87,374			0		87,374
Marketable equity securities		526		0			0		526
Total available-for-sale investment securities		1,909,816		1,121,272			0		3,031,088
Mortgage loans held for sale		0		461			0		461
Commitments to originate real estate loans for sale		0		0			89		89
Forward sales commitments		0		4			0		4
Interest rate swap agreements asset		0		1,064			0		1,064
Interest rate swap agreements liability		0		(904	)		0		(904	)
Total	$	1,909,816	$	1,121,897		$	89	$	3,031,802

	December 31, 2016
(000's omitted)	Level 1		Level 2		Level 3		Total Fair Value
Available-for-sale investment securities:
U.S. Treasury and agency securities	$	1,902,762	$	0	$	0	$	1,902,762
Obligations of state and political subdivisions		0		594,990		0		594,990
Government agency mortgage-backed securities		0		235,230		0		235,230
Corporate debt securities		0		5,687		0		5,687
Government agency collateralized mortgage obligations		0		9,535		0		9,535
Marketable equity securities		452		0		0		452
Total available-for-sale investment securities		1,903,214		845,442		0		2,748,656
Mortgage loans held for sale		0		2,416		0		2,416
Commitments to originate real estate loans for sale		0		0		54		54
Forward sales commitments		0		3		0		3
Total	$	1,903,214	$	847,861	$	54	$	2,751,129

The valuation techniques used to measure fair value for the items in the table above are as follows:

· Available for sale investment securities – The fair value of available-for-sale investment securities is based upon quoted prices, if available.  If quoted prices are not available, fair values are measured using quoted market prices for similar securities or model-based valuation techniques.  Level 1 securities include U.S. Treasury obligations and marketable equity securities that are traded by dealers or brokers in active over-the-counter markets.  Level 2 securities include U.S. agency securities, mortgage-backed securities issued by government-sponsored entities, municipal securities and corporate debt securities that are valued by reference to prices for similar securities or through model-based techniques in which all significant inputs, such as reported trades, trade execution data, LIBOR swap yield curve, market prepayment speeds, credit information, market spreads, and security’s terms and conditions, are observable.  See Note C for further disclosure of the fair value of investment securities.

· Mortgage loans held for sale – Mortgage loans held for sale are carried at fair value, which is determined using quoted secondary-market prices of loans with similar characteristics and, as such, have been classified as a Level 2 valuation.  The unpaid principal value of mortgage loans held for sale at December 31, 2017 is approximately $0.5 million.  The unrealized gain on mortgage loans held for sale of approximately $13,000 was recognized in other banking services in the Consolidated Statement of Income for the year ended December 31, 2017.

· Forward sales commitments – The Company enters into forward sales commitments to sell certain residential real estate loans.  Such commitments are considered to be derivative financial instruments and, therefore, are carried at estimated fair value in the other asset or other liability section of the consolidated statement of condition.  The fair value of these forward sales commitments is primarily measured by obtaining pricing from certain government-sponsored entities and reflects the underlying price the entity would pay the Company for an immediate sale on these mortgages.  As such, these instruments are classified as Level 2 in the fair value hierarchy.

· Commitments to originate real estate loans for sale – The Company enters into various commitments to originate residential real estate loans for sale.  Such commitments are considered to be derivative financial instruments and, therefore, are carried at estimated fair value in the other asset or other liability section of the consolidated statement of condition.  The estimated fair value of these commitments is determined using quoted secondary market prices obtained from certain government-sponsored entities.  Additionally, accounting guidance requires the expected net future cash flows related to the associated servicing of the loan to be included in the fair value measurement of the derivative.  The expected net future cash flows are based on a valuation model that calculates the present value of estimated net servicing income.  The valuation model incorporates assumptions that market participants would use in estimating future net servicing income.  Such assumptions include estimates of the cost of servicing loans, appropriate discount rate and prepayment speeds.  The determination of expected net cash flows is considered a significant unobservable input contributing to the Level 3 classification of commitments to originate real estate loans for sale.

· Interest rate swap agreements – The interest rate swaps are reported at their fair value utilizing Level 2 inputs from third parties.  The fair value of our interest rate swaps are determined using prices obtained from a third party advisor.  The fair value measurement of the interest rate swap is determined by netting the discounted future fixed cash payments and the discounted expected variable cash receipts.  The variable cash receipts are based on the expectation of future interest rates derived from observed market interest rate curves.

 The changes in Level 3 assets measured at fair value on a recurring basis are immaterial.

Assets and liabilities measured on a non-recurring basis:

	December 31, 2017								December 31, 2016
(000's omitted)	Level 1		Level 2		Level 3		Total Fair Value		Level 1		Level 2		Level 3		Total Fair Value
Impaired loans	$	0	$	0	$	0	$	0	$	0	$	0	$	633	$	633
Other real estate owned		0		0		1,915		1,915		0		0		1,966		1,966
Total	$	0	$	0	$	1,915	$	1,915	$	0	$	0	$	2,599	$	2,599

Loans are generally not recorded at fair value on a recurring basis.  Periodically, the Company records nonrecurring adjustments to the carrying value of loans based on fair value measurements for partial charge-offs of the uncollectible portions of those loans.  Nonrecurring adjustments also include certain impairment amounts for collateral-dependent loans calculated when establishing the allowance for credit losses. Such amounts are generally based on the fair value of the underlying collateral supporting the loan and, as a result, the carrying value of the loan less the calculated valuation amount does not necessarily represent the fair value of the loan. Real estate collateral is typically valued using independent appraisals or other indications of value based on recent comparable sales of similar properties or assumptions generally observable in the marketplace, adjusted for non-observable inputs.  Thus, the resulting nonrecurring fair value measurements are generally classified as Level 3. Estimates of fair value used for other collateral supporting commercial loans generally are based on assumptions not observable in the marketplace and, therefore, such valuations classify as Level 3.

Other real estate owned (“OREO”) is valued at the time the loan is foreclosed upon and the asset is transferred to OREO. The value is based primarily on third party appraisals, less estimated costs to sell. The appraisals are sometimes further discounted based on management’s historical knowledge, changes in market conditions from the time of valuation, and/or management’s expertise and knowledge of the customer and customer’s business. Such discounts are significant, ranging from 9% to 99% at December 31, 2017, and result in a Level 3 classification of the inputs for determining fair value. OREO is reviewed and evaluated on at least a quarterly basis for additional impairment and adjusted accordingly, based on the same factors identified above. The Company recovers the carrying value of OREO through the sale of the property. The ability to affect future sales prices is subject to market conditions and factors beyond the Company’s control and may impact the estimated fair value of a property.

Originated mortgage servicing rights are recorded at their fair value at the time of sale of the underlying loan, and are amortized in proportion to and over the estimated period of net servicing income.  The fair value of mortgage servicing rights is based on a valuation model incorporating inputs that market participants would use in estimating future net servicing income.  Such inputs include estimates of the cost of servicing loans, appropriate discount rate, and prepayment speeds and are considered to be unobservable and contribute to the Level 3 classification of mortgage servicing rights.  In accordance with GAAP, the Company must record impairment charges, on a nonrecurring basis, when the carrying value of a stratum exceeds its estimated fair value.  Impairment is recognized through a valuation allowance.  There is no valuation allowance at December 31, 2017 as the fair value of mortgage servicing rights of approximately $2.5 million exceeded the carrying value of approximately $1.4 million.

The Company evaluates goodwill for impairment on an annual basis, or more often if events or circumstances indicate there may be impairment.  The fair value of each reporting unit is compared to the carrying amount of that reporting unit in order to determine if impairment is indicated.  If so, the implied fair value of the reporting unit’s goodwill is compared to its carrying amount and the impairment loss is measured by the excess of the carrying value of the goodwill over fair value of the goodwill.  In such situations, the Company performs a discounted cash flow modeling technique that requires management to make estimates regarding the amount and timing of expected future cash flows of the assets and liabilities of the reporting unit that enable the Company to calculate the implied fair value of the goodwill.  It also requires use of a discount rate that reflects the current return expectation of the market in relation to present risk-free interest rates, expected equity market premiums, peer volatility indicators and company-specific risk indicators.  The Company did not recognize an impairment charge during 2017 or 2016.

The significant unobservable inputs used in the determination of fair value of assets classified as Level 3 on a recurring or non-recurring basis as of December 31, 2017 are as follows:

(000's omitted)	Fair Value		Valuation Technique	Significant Unobservable Inputs	Significant Unobservable Input Range (Weighted Average)
Other real estate owned	$	1,915	Fair value of collateral	Estimated cost of disposal/market adjustment		9.0% - 99.0% (38.5	%)
Commitments to originate real estate loans for sale		89	Discounted cash flow	Embedded servicing value		1	%

The significant unobservable inputs used in the determination of fair value of assets classified as Level 3 on a recurring or non-recurring basis as of December 31, 2016 are as follows:

(000's omitted)	Fair Value		Valuation Technique	Significant Unobservable Inputs	Significant Unobservable Input Range (Weighted Average)
Other real estate owned	$	1,966	Fair value of collateral	Estimated cost of disposal/market adjustment		9.0% - 97.0% (29.6	%)
Impaired loans		633	Fair value of collateral	Estimated cost of disposal/market adjustment		15.0% - 50.0% (36.5	%)
Commitments to originate real estate loans for sale		54	Discounted cash flow	Embedded servicing value		1	%

The Company determines fair values based on quoted market values, where available, estimates of present values, or other valuation techniques.  Those techniques are significantly affected by the assumptions used, including, but not limited to, the discount rate and estimates of future cash flows.  In that regard, the derived fair value estimates cannot be substantiated by comparison to independent markets and, in many cases, may not be realized in immediate settlement of the instrument.  Certain financial instruments and all nonfinancial instruments are excluded from fair value disclosure requirements.  Accordingly, the aggregate fair value amounts presented do not represent the underlying value of the Company.

The carrying amounts and estimated fair values of the Company’s other financial instruments that are not accounted for at fair value at December 31, 2017 and 2016 are as follows:

	December 31, 2017				December 31, 2016
(000's omitted)	Carrying Value		Fair Value		Carrying Value		Fair Value
Financial assets:
Net loans	$	6,209,174	$	6,244,941	$	4,901,329		4,935,140
Financial liabilities:
Deposits		8,444,420		8,431,481		7,075,954		7,071,191
Short-term borrowings		24,000		24,000		146,200		146,200
Securities sold under agreement to repurchase, short-term		337,011		337,011		0		0
Other long-term debt		2,071		2,021		0		0
Subordinated debt held by unconsolidated subsidiary trusts		122,814		122,814		102,170		90,144

The following is a further description of the principal valuation methods used by the Company to estimate the fair values of its financial instruments.

Loans have been classified as a Level 3 valuation.  Fair values for variable rate loans that reprice frequently are based on carrying values.  Fair values for fixed rate loans are estimated using discounted cash flows and interest rates currently being offered for loans with similar terms to borrowers of similar credit quality.

Deposits have been classified as a Level 2 valuation.  The fair value of demand deposits, interest-bearing checking deposits, savings accounts and money market deposits is the amount payable on demand at the reporting date.  The fair value of time deposit obligations are based on current market rates for similar products.

Borrowings and subordinated debt held by unconsolidated subsidiary trusts have been classified as a Level 2 valuation.  The fair value of FHLB overnight advances and securities sold under agreement to repurchase, short-term, is the amount payable on demand at the reporting date.  Fair values for long-term borrowings and subordinated debt held by unconsolidated subsidiary trusts are estimated using discounted cash flows and interest rates currently being offered on similar securities.  The difference between the carrying values of long-term borrowings and subordinated debt held by unconsolidated subsidiary trusts, and their fair values, are not material as of the reporting dates.

Other financial assets and liabilities – Cash and cash equivalents have been classified as a Level 1 valuation, while accrued interest receivable and accrued interest payable have been classified as a Level 2 valuation.  The fair values of each approximate the respective carrying values because the instruments are payable on demand or have short-term maturities and present relatively low credit risk and interest rate risk.

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DERIVATIVE INSTRUMENTS

12 Months Ended

Dec. 31, 2017

DERIVATIVE INSTRUMENTS [Abstract]

DERIVATIVE INSTRUMENTS

NOTE S: DERIVATIVE INSTRUMENTS

The Company is party to derivative financial instruments in the normal course of its business to meet the financing needs of its customers and to manage its own exposure to fluctuations in interest rates.  These financial instruments have been limited to interest rate swap agreements, commitments to originate real estate loans held for sale and forward sales commitments.  The Company does not hold or issue derivative financial instruments for trading or other speculative purposes.

The Company enters into forward sales commitments for the future delivery of residential mortgage loans, and interest rate lock commitments to fund loans at a specified interest rate.  The forward sales commitments are utilized to reduce interest rate risk associated with interest rate lock commitments and loans held for sale.  Changes in the estimated fair value of the forward sales commitments and interest rate lock commitments subsequent to inception are based on changes in the fair value of the underlying loan resulting from the fulfillment of the commitment and changes in the probability that the loan will fund within the terms of the commitment, which is affected primarily by changes in interest rates and the passage of time.  At inception and during the life of the interest rate lock commitment, the Company includes the expected net future cash flows related to the associated servicing of the loan as part of the fair value measurement of the interest rate lock commitments.  These derivatives are recorded at fair value, which were immaterial at December 31, 2017.  The effect of the changes to these derivatives for the year then ended was also immaterial.

The Company acquired interest rate swaps from the Merchants acquisition with notional amounts with certain commercial customers which totaled $38.9 million at December 31, 2017.  In order to minimize the Company’s risk, these customer derivatives (pay floating/receive fixed swaps) have been offset with essentially matching interest rate swaps (pay fixed/receive floating swaps) with the Company’s counterparty totaling $38.9 million. The weighted average receive rate of these interest rate swaps was 3.38%, the weighted average pay rate was 3.84% and the weighted average maturity was 6.5 years.  The fair values of $0.9 million and $0.9 million were reflected in other assets and other liabilities, respectively, in the accompanying consolidated statement of condition at December 31, 2017. Hedge accounting has not been applied for these derivatives.  Since the terms of the swaps with our customer and the other financial institution offset each other, with the only difference being counterparty credit risk, changes in the fair value of the underlying derivative contracts are not materially different and do not significantly impact our results of operations.

The Company also acquired interest rate swaps from the Merchants acquisition with notional amounts totaling $7.0 million at December 31, 2017 that were designated as fair value hedges of certain fixed rate loans with municipalities. At December 31, 2017, the weighted average receive rate of these interest rate swaps was 2.30%, the weighted average pay rate was 3.11% and the weighted average maturity was 15.5 years. The fair value of $0.2 million at December 31, 2017, was reflected as a reduction to loans and an increase to other assets.  The ineffective portion of the interest swaps was immaterial and as such, amounts are not recognized in earnings.

The Company assessed its counterparty risk at December 31, 2017 and determined any credit risk inherent in our derivative contracts was not material. Information about the fair value of derivative financial instruments can be found in Note R to these consolidated financial statements.

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VARIABLE INTEREST ENTITIES

12 Months Ended

Dec. 31, 2017

VARIABLE INTEREST ENTITIES [Abstract]

VARIABLE INTEREST ENTITIES

NOTE T: VARIABLE INTEREST ENTITIES

The Company’s wholly-owned subsidiaries, Community Statutory Trust III, Community Capital Trust IV and MBVT Statutory Trust I, are VIEs for which the Company is not the primary beneficiary.  Accordingly, the accounts of these entities are not included in the Company’s consolidated financial statements.  See further information regarding Community Statutory Trust III, Community Capital Trust IV and MBVT Statutory Trust I in Note H: Borrowings.

In connection with the Company’s acquisition of Oneida, the Company acquired OPFC II which holds a 50% membership interest in 706 North Clinton, LLC (“706 North Clinton”), an entity formed for the purpose of acquiring and rehabilitating real property.  The real property held by 706 North Clinton is principally occupied by subsidiaries of the Company. The Company analyzed the operating agreement and capital structure of 706 North Clinton and determined that it was the primary beneficiary and therefore should consolidate 706 North Clinton in its financial statements.  This conclusion was based on the determination that the Company has a de facto agency relationship because of the financing arrangement between the other member of 706 North Clinton and the Bank which provides OPFC II with both the power to direct the activities of 706 North Clinton and the obligation to absorb any losses of 706 North Clinton.

The carrying amount of the assets and liabilities of 706 North Clinton and the classification of these assets and liabilities in the Company’s consolidated statements of condition at December 31 is as follows:

(000's omitted)	2017		2016
Cash and cash equivalents	$	74	$	30
Premises and equipment, net		6,266		6,429
Other assets		5		0
Total assets	$	6,345	$	6,459
Accrued interest and other liabilities / Total liabilities	$	0	$	1

In addition to the assets and liabilities of 706 North Clinton, the minority interest in 706 North Clinton of $3.2 million at December 31, 2017 is included in the Company’s consolidated statement of condition.  The creditors of 706 North Clinton do not have a claim on the general assets of the Company.  The Company’s maximum loss exposure net of minority interest in 706 North Clinton is approximately $4.7 million as of December 31, 2017, including a $1.5 million loss exposure related to the financing agreement between the other member of 706 North Clinton and the Bank.

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SEGMENT INFORMATION

12 Months Ended

Dec. 31, 2017

SEGMENT INFORMATION [Abstract]

SEGMENT INFORMATION

NOTE U: SEGMENT INFORMATION

Operating segments are components of an enterprise, which are evaluated regularly by the “chief operating decision maker” in deciding how to allocate resources and assess performance.  The Company’s chief operating decision maker is the President and Chief Executive Officer of the Company. The Company has identified Banking, Employee Benefit Services and All Other as its reportable operating business segments.  CBNA operates the Banking segment that provides full-service banking to consumers, businesses, and governmental units in Upstate New York as well as Northeastern Pennsylvania, Vermont and Western Massachusetts.  Employee Benefit Services, which includes operating subsidiaries of BPAS, BPAS-APS, BPAS Trust Company of Puerto Rico, NRS and HB&T, provides employee benefit trust, collective investment fund, retirement plan administration, fund administration, transfer agency, actuarial, VEBA/HRA, and health and welfare consulting services.  The All Other segment is comprised of; (a) wealth management services including trust services provided by the personal trust unit within the Bank, broker-dealer and investment advisory services provided by CISI and The Carta Group, and asset management provided by Nottingham, and (b) full-service insurance, risk management and employee benefit services provided by OneGroup.  The accounting policies used in the disclosure of business segments are the same as those described in the summary of significant accounting policies (See Note A).

Information about reportable segments and reconciliation of the information to the consolidated financial statements follows:

(000's omitted)	Banking		Employee Benefit Services		All Other		Eliminations			Consolidated Total
2017
Net interest income	$	315,025	$	396	$	254	$	0		$	315,675
Provision for loan losses		10,984		0		0		0			10,984
Noninterest income		73,337		82,743		49,201		(2,858	)		202,423
Amortization of intangible assets		5,296		8,578		3,067		0			16,941
Acquisition expenses		24,549		1,194		243		0			25,986
Other operating expenses		218,608		51,138		37,334		(2,858	)		304,222
Income before income taxes	$	128,925	$	22,229	$	8,811	$	0		$	159,965
Assets	$	10,505,919	$	203,369	$	66,548	$	(29,638	)	$	10,746,198
Goodwill	$	629,916	$	84,449	$	20,065	$	0		$	734,430
2016
Net interest income	$	273,542	$	162	$	192	$	0		$	273,896
Provision for loan losses		8,076		0		0		0			8,076
Noninterest income		66,059		48,261		43,747		(2,442	)		155,625
Amortization of intangible assets		2,682		420		2,377		0			5,479
Acquisition expenses		1,005		445		256		0			1,706
Other operating expenses		190,263		36,892		34,950		(2,442	)		259,663
Income before income taxes	$	137,575	$	10,666	$	6,356	$	0		$	154,597
Assets	$	8,598,057	$	38,742	$	71,428	$	(41,790	)	$	8,666,437
Goodwill	$	440,870	$	8,019	$	16,253	$	0		$	465,142
2015
Net interest income	$	248,167	$	132	$	121	$	0		$	248,420
Provision for loan losses		6,447		0		0		0			6,447
Noninterest income		57,704		46,784		20,967		(2,156	)		123,299
Amortization of intangible assets		2,803		515		345		0			3,663
Acquisition expenses		6,947		21		69		0			7,037
Other operating expenses		174,918		35,197		14,396		(2,156	)		222,355
Income before income taxes	$	114,756	$	11,183	$	6,278	$	0		$	132,217
Assets	$	8,513,228	$	35,011	$	70,067	$	(65,637	)	$	8,552,669
Goodwill	$	439,052	$	8,019	$	16,181	$	0		$	463,252

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)

12 Months Ended

Dec. 31, 2017

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]

Nature of Operations

Nature of Operations

Community Bank System, Inc. (the “Company”) is a registered financial holding company which wholly-owns two significant consolidated subsidiaries: Community Bank, N.A. (the “Bank” or “CBNA”), and Benefit Plans Administrative Services, Inc. (“BPAS”).  As of December 31, 2017, BPAS owns five subsidiaries:  Benefit Plans Administrative Services, LLC (“BPA”), a provider of defined benefit contribution plan administration services; Northeast Retirement Services, LLC (“NRS”), a provider of institutional transfer agency, master recordkeeping services, fund administration, trust and retirement plan services; BPAS Actuarial & Pension Services, LLC (“BPAS-APS”), a provider of actuarial and benefit consulting services; BPAS Trust Company of Puerto Rico, a Puerto Rican trust company; and Hand Benefits & Trust Company (“HB&T”), a provider of collective investment fund administration and institutional trust services.  NRS owns one subsidiary, Global Trust Company, Inc. (“GTC”), a non-depository trust company which provides fiduciary services for collective investment trusts and other products.  HB&T owns one subsidiary, Hand Securities Inc. (“HSI”), an introducing broker-dealer.  The Company also wholly-owns three unconsolidated subsidiary business trusts formed for the purpose of issuing mandatorily-redeemable preferred securities which are considered Tier I capital under regulatory capital adequacy guidelines (see Note P).

As of December 31, 2017, the Bank operated 225 full service branches operating as Community Bank, N.A. throughout 35 counties of Upstate New York, six counties of Northeastern Pennsylvania, 12 counties of Vermont and one county of Western Massachusetts, offering a range of commercial and retail banking services.  The Bank owns the following operating subsidiaries:  The Carta Group, Inc. (“Carta Group”), CBNA Preferred Funding Corporation (“PFC”), CBNA Treasury Management Corporation (“TMC”), Community Investment Services, Inc. (“CISI”), NOTCH Investment Fund, LLC (“NOTCH”), Nottingham Advisors, Inc. (“Nottingham”), OneGroup NY, Inc. (“OneGroup”), and Oneida Preferred Funding II LLC (“OPFC II”).  OneGroup is a full-service insurance agency offering personal and commercial property insurance and other risk management products and services.  NOTCH, PFC and OPFC II primarily act as investors in residential and commercial real estate activities.  TMC provides cash management, investment, and treasury services to the Bank.  CISI and Carta Group provide broker-dealer and investment advisory services.  Nottingham provides asset management services to individuals, corporations, corporate pension and profit sharing plans, and foundations.

Principles of Consolidation

Principles of Consolidation

The consolidated financial statements include the accounts of the Company and its subsidiaries.  All intercompany accounts and transactions have been eliminated in consolidation.

Variable Interest Entities (“VIE”) are legal entities in which equity investors do not have the characteristics of a controlling financial interest or do not have sufficient equity at risk for the legal entities to finance its activities without additional subordinated financial support.  VIEs may be required to be consolidated by a company if it is determined the company is the primary beneficiary of a VIE.  The primary beneficiary of a VIE is the enterprise that has: (1) the power to direct the activities of the VIE that most significantly impact the VIE’s economic performance, and (2) the obligation to absorb losses of the VIE that could potentially be significant to the VIE or the right to receive benefits of the VIE that could potentially be significant to the VIE.  The Company’s VIE’s are described in more detail in Note T to the consolidated financial statements.

Critical Accounting Estimates in the Preparation of Financial Statements

Critical Accounting Estimates in the Preparation of Financial Statements

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period.  Actual results could differ from those estimates.  Critical accounting estimates include the allowance for loan losses, actuarial assumptions associated with the pension, post-retirement and other employee benefit plans, the provision for income taxes, investment valuation and other-than-temporary impairment, the carrying value of goodwill and other intangible assets, and acquired loan valuations.

Risk and Uncertainties

Risk and Uncertainties

In the normal course of its business, the Company encounters economic and regulatory risks.  There are three main components of economic risk: interest rate risk, credit risk and market risk.  The Company is subject to interest rate risk to the degree that its interest-bearing liabilities mature or reprice at different speeds, or on different basis, from its interest-earning assets.  The Company’s primary credit risk is the risk of default on the Company’s loan portfolio that results from the borrowers’ inability or unwillingness to make contractually required payments.  Market risk reflects potential changes in the value of collateral underlying loans, the fair value of investment securities, and loans held for sale.

The Company is subject to regulations of various governmental agencies.  These regulations can change significantly from period to period.  The Company also undergoes periodic examinations by the regulatory agencies which may subject it to further changes with respect to asset valuations, amounts of required loan loss allowances, and operating restrictions resulting from the regulators’ judgments based on information available to them at the time of their examinations.

Revenue Recognition

Revenue Recognition

The Company recognizes income on an accrual basis. CISI and Carta Group recognize fee income when investment and insurance products are sold to customers.  Nottingham provides asset management services to brokerage firms and clients and recognizes income ratably over the contract period during which service is performed.  Revenue from BPA’s administration and recordkeeping services is recognized ratably over the service contract period.  Revenue from consulting and actuarial services is recognized when services are rendered.  OneGroup recognizes commission revenue at the later of the effective date of the insurance policy, or the date on which the policy premium is billed to the customer.  At that date, the earnings process has been completed and the impact of refunds for policy cancellations can be reasonably estimated to establish reserves. The reserve for policy cancellations is based upon historical cancellation experience adjusted for known circumstances. All intercompany revenue and expense among related entities are eliminated in consolidation.

Cash and Cash Equivalents

Cash and Cash Equivalents

For purposes of reporting cash flows, cash and cash equivalents include cash on hand, amounts due from banks, and highly liquid investments with original maturities of less than 90 days.  The carrying amounts reported in the consolidated statements of condition for cash and cash equivalents approximate those assets’ fair values.

Investment Securities

Investment Securities

The Company can classify its investments in debt and equity securities as trading, held-to-maturity, or available-for-sale.  Held-to-maturity securities are those for which the Company has the positive intent and ability to hold until maturity, and are reported at amortized cost.  The Company did not use the held-to-maturity classification in 2016 or 2017.  Securities classified as available-for-sale are reported at fair value with net unrealized gains and losses reflected as a separate component of shareholders' equity, net of applicable income taxes.  None of the Company's investment securities have been classified as trading securities at December 31, 2017.  Certain equity securities are stated at cost and include restricted stock of the Federal Reserve Bank of New York (“Federal Reserve”) and the Federal Home Loan Bank of New York and the Federal Home Loan Bank of Boston (collectively referred to as “FHLB”).

Fair values for investment securities are based upon quoted market prices, where available.  If quoted market prices are not available, fair values are based upon quoted market prices of comparable instruments, or a discounted cash flow model using market estimates of interest rates and volatility.

The Company conducts an assessment of all securities in an unrealized lossposition to determine if other-than-temporary impairment (“OTTI”) exists on a quarterly basis. An unrealized loss exists when the current fair value of an individual security is less than its amortized cost basis.  The OTTI assessment considers the security structure, recent security collateral performance metrics, if applicable, external credit ratings, failure of the issuer to make scheduled interest or principal payments, judgment about and expectations of future performance, and relevant independent industry research, analysis, and forecasts. The severity of the impairment and the length of time the security has been impaired is also considered in the assessment.  The assessment of whether an OTTI decline exists is performed on each security, regardless of the classification of the security as available-for-sale or held-to-maturity, and involves a high degree of subjectivity and judgment that is based on the information available to management at a point in time.

An OTTI loss must be recognized for a debt security in an unrealized loss position if there is intent to sell the security or it is more likely than not the Company will be required to sell the security prior to recovery of its amortized cost basis. In this situation, the amount of loss recognized in income is equal to the difference between the fair value and the amortized cost basis of the security. Even if management does not have the intent, and it is not more likely than not that the Company will be required to sell the securities, an evaluation of the expected cash flows to be received is performed to determine if a credit loss has occurred. For debt securities, a critical component of the evaluation for OTTI is the identification of credit-impaired securities, where the Company does not expect to receive cash flows sufficient to recover the entire amortized cost basis of the security.  In the event of a credit loss, only the amount of impairment associated with the credit loss would be recognized in income. The portion of the unrealized loss relating to other factors, such as liquidity conditions in the market or changes in market interest rates, is recorded in accumulated other comprehensive loss.

Equity securities are also evaluated to determine whether the unrealized loss is expected to be recoverable based on whether evidence exists to support a realizable value equal to or greater than the amortized cost basis. If it is probable that the amortized cost basis will not be recovered, taking into consideration the estimated recovery period and the ability to hold the equity security until recovery, OTTI is recognized in earnings equal to the difference between the fair value and the amortized cost basis of the security.

The specific identification method is used in determining the realized gains and losses on sales of investment securities and OTTI charges.  Premiums and discounts on securities are amortized and accreted, respectively, on the interest method basis over the period to maturity or estimated life of the related security.  Purchases and sales of securities are recognized on a trade date basis.

Loans

Loans

Loans are stated at unpaid principal balances, net of unearned income.  Mortgage loans held for sale are carried at fair value and are included in loans held for sale on the consolidated statements of condition.  Fair values for variable rate loans that reprice frequently are based on carrying values.  Fair values for fixed rate loans are estimated using discounted cash flows and interest rates currently being offered for loans with similar terms to borrowers of similar credit quality.  The carrying amount of accrued interest approximates its fair value.

Interest on loans is accrued and credited to operations based upon the principal amount outstanding.  Nonrefundable loan fees and related direct costs are deferred and included in the loan balances where they are amortized over the life of the loan as an adjustment to loan yield using the effective yield method.  Premiums and discounts on purchased loans are amortized using the effective yield method over the life of the loans.

Acquired Loans

Acquired loans

Acquired loans are initially recorded at their acquisition date fair values.  The carryover of allowance for loan losses is prohibited as any credit losses in the loans are included in the determination of the fair value of the loans at the acquisition date. Fair values for acquired loans are based on a discounted cash flow methodology that involves assumptions and judgments as to credit risk, prepayment risk, liquidity risk, default rates, loss severity, payment speeds, collateral values and discount rate.

Acquired impaired loans

Acquired loans that have evidence of deterioration in credit quality since origination and for which it is probable, at acquisition, that the Company will be unable to collect all contractually required payments are accounted for as impaired loans under ASC 310-30.  The excess of undiscounted cash flows expected at acquisition over the estimated fair value is referred to as the accretable discount and is recognized into interest income over the remaining life of the loans using the interest method. The difference between contractually required payments at acquisition and the undiscounted cash flows expected to be collected at acquisition is referred to as the non-accretable discount. The non-accretable discount represents estimated future credit losses and other contractually required payments that the Company does not expect to collect. Subsequent decreases in expected cash flows are recognized as impairments through a charge to the provision for loan losses resulting in an increase in the allowance for loan losses. Subsequent improvements in expected cash flows result in a recovery of previously recorded allowance for loan losses or a reversal of a corresponding amount of the non-accretable discount, which the Company then reclassifies as an accretable discount that is recognized into interest income over the remaining life of the loans using the interest method.

Acquired loans that met the criteria for non-accrual of interest prior to acquisition may be considered performing upon acquisition, regardless of whether the customer is contractually delinquent, if the Company can reasonably estimate the timing and amount of the expected cash flows on such loans and if the Company expects to fully collect the new carrying value of the loans. As such, the Company may no longer consider the loan to be non-accrual or non-performing and may accrue interest on these loans, including the impact of any accretable discount.

Acquired non-impaired loans

Acquired loans that do not meet the requirements under ASC 310-30 are considered acquired non-impaired loans. The difference between the acquisition date fair value and the outstanding balance represents the fair value adjustment for a loan and includes both credit and interest rate considerations. Fair value adjustments may be discounts (or premiums) to a loan’s cost basis and are accreted (or amortized) to net interest income (or expense) over the loan’s remaining life in accordance with ASC 310-20. Fair value adjustments for revolving loans are accreted (or amortized) using a straight line method. Term loans are accreted (or amortized) using the constant effective yield method.

Subsequent to the purchase date, the methods used to estimate the allowance for loan losses for the acquired non-impaired loans is consistent with the policy described below.  However, the Company compares the net realizable value of the loans to the carrying value, for loans collectively evaluated for impairment.  The carrying value represents the net of the loan’s unpaid principal balance and the remaining purchase discount (or premium) that has yet to be accreted (or amortized) into interest income (or interest expense).  When the carrying value exceeds the net realizable value, an allowance for loan losses is recognized.

Impaired and Other Nonaccrual Loans

Impaired and Other Nonaccrual Loans

The Company places a loan on nonaccrual status when the loan becomes 90 days past due (or sooner, if management concludes collection is doubtful), except when, in the opinion of management, it is well-collateralized and in the process of collection. A loan may be placed on nonaccrual status earlier than ninety days past due if there is deterioration in the financial position of the borrower or if other conditions of the loan so warrant. When a loan is placed on nonaccrual status, uncollected accrued interest is reversed against interest income and the amortization of nonrefundable loan fees and related direct costs is discontinued. Interest income during the period the loan is on nonaccrual status is recorded on a cash basis after recovery of principal is reasonably assured. Nonaccrual loans are returned to accrual status when management determines that the borrower’s performance has improved and that both principal and interest are collectible.  This generally requires a sustained period of timely principal and interest payments and a well-documented credit evaluation of the borrower’s financial condition.

A loan is considered modified in a troubled debt restructuring (“TDR”) when, due to a borrower’s financial difficulties, the Company makes a concession(s) to the borrower that it would not otherwise consider.  These modifications may include, among others, an extension for the term of the loan, or granting a period when interest–only payments can be made with the principal payments and interest caught up over the remaining term of the loan or at maturity.  Generally, a nonaccrual loan that has been modified in a TDR remains on nonaccrual status for a period of 12 months to demonstrate that the borrower is able to meet the terms of the modified loan.  If the borrower’s ability to meet the revised payment schedule is uncertain, the loan remains on nonaccrual status.

Regulatory guidance issued by the OCC requires certain loans that have been discharged in Chapter 7 bankruptcy to be reported as TDRs.  In accordance with this guidance, loans that have been discharged in Chapter 7 bankruptcy but not reaffirmed by the borrower are classified as TDRs, irrespective of payment history or delinquency status, even if the repayment terms for the loan have not been otherwise modified and the Company’s lien position against the underlying collateral remains unchanged.  Pursuant to that guidance, the Company records a charge-off equal to any portion of the carrying value that exceeds the net realizable value of the collateral.

Commercial loans greater than $0.5 million are evaluated individually for impairment.  A loan is considered impaired, based on current information and events, if it is probable that the Company will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement.  The measurement of impaired loans is generally based upon the present value of expected future cash flows or the fair value of the collateral, if the loan is collateral-dependent.

The Company’s charge-off policy by loan type is as follows:

· Business lending loans are generally charged-off to the extent outstanding principal exceeds the fair value of estimated proceeds from collection efforts, including liquidation of collateral.  The charge-off is recognized when the loss becomes reasonably quantifiable.

· Consumer installment loans are generally charged-off to the extent outstanding principal exceeds the fair value of collateral, and are recognized by the end of the month in which the loan becomes 90 days past due.

· Consumer mortgage and home equity loans are generally charged-off to the extent outstanding principal exceeds the fair value of the property, less estimated costs to sell, and are recognized when the loan becomes 180 days past due.

Allowance for Loan Losses

Allowance for Loan Losses

Management continually evaluates the credit quality of the Company’s loan portfolio, and performs a formal review of the adequacy of the allowance for loan losses on a quarterly basis.  The allowance reflects management’s best estimate of probable losses inherent in the loan portfolio.  Determination of the allowance is subjective in nature and requires significant estimates.   The Company’s allowance methodology consists of two broad components - general and specific loan loss allocations.

The general loan loss allocation is composed of two calculations that are computed on five main loan segments:  business lending, consumer direct, consumer indirect, home equity and consumer mortgage.  The first calculation is quantitative and determines an allowance level based on the latest 36 months of historical net charge-off data for each loan class (commercial loans exclude balances with specific loan loss allocations).  The second calculation is qualitative and takes into consideration eight qualitative environmental factors:  levels and trends in delinquencies and impaired loans; levels of and trends in charge-offs and recoveries; trends in volume and terms of loans; effects of any changes in risk selection and underwriting standards, and other changes in lending policies, procedures, and practices; experience, ability, and depth of lending management and other relevant staff; national and local economic trends and conditions; industry conditions; and effects of changes in credit concentrations.    A component of the qualitative calculation is the unallocated allowance for loan loss.  The qualitative and quantitative calculations are added together to determine the general loan loss allocation.  The specific loan loss allocation relates to individual commercial loans that are both greater than $0.5 million and in a nonaccruing status with respect to interest.  Specific loan losses are based on discounted estimated cash flows, including any cash flows resulting from the conversion of collateral or collateral shortfalls.  The allowance levels computed from the specific and general loan loss allocation methods are combined with unallocated allowances and allowances needed for acquired loans to derive the total required allowance for loan losses to be reflected on the Consolidated Statement of Condition.

Loan losses are charged off against the allowance, while recoveries of amounts previously charged off are credited to the allowance.  A provision for loan losses is charged to operations based on management’s periodic evaluation of factors previously mentioned.

Intangible Assets

Intangible Assets

Intangible assets include core deposit intangibles, customer relationship intangibles and goodwill arising from acquisitions. Core deposit intangibles and customer relationship intangibles are amortized on either an accelerated or straight-line basis over periods ranging from seven to 20 years. The initial and ongoing carrying value of goodwill and other intangible assets is based upon discounted cash flow modeling techniques that require management to make estimates regarding the amount and timing of expected future cash flows.  It also requires use of a discount rate that reflects the current return requirements of the market in relation to present risk-free interest rates, required equity market premiums, peer volatility indicators, and company-specific risk indicators.

The Company evaluates goodwill for impairment on an annual basis, or more often if events or circumstances indicate there may be impairment.  The implied fair value of a reporting unit’s goodwill is compared to its carrying amount and the impairment loss is measured by the excess of the carrying value over fair value.  The fair value of each reporting unit is compared to the carrying amount of that reporting unit in order to determine if impairment is indicated.

Premises and Equipment

Premises and Equipment

Premises and equipment are stated at cost less accumulated depreciation.  Computer software costs that are capitalized only include external direct costs of obtaining and installing the software.  The Company has not developed any internal use software.  Depreciation is calculated using the straight-line method over the estimated useful lives of the assets.  Useful lives range from three to 10 years for equipment; three to seven years for software and hardware; and 10 to 40 years for building and building improvements.  Land improvements are depreciated over 20 years and leasehold improvements are amortized over the shorter of the term of the respective lease plus any optional renewal periods that are reasonably assured or life of the asset. Maintenance and repairs are charged to expense as incurred.

Other Real Estate

Other Real Estate

Other real estate owned is comprised of properties acquired through foreclosure, or by deed in lieu of foreclosure.  These assets are carried at fair value less estimated costs of disposal.  At foreclosure, if the fair value, less estimated costs to sell, of the real estate acquired is less than the Company’s recorded investment in the related loan, a write-down is recognized through a charge to the allowance for loan losses.  Any subsequent reduction in value is recognized by a charge to income.  Operating costs associated with the properties are charged to expense as incurred.  At December 31, 2017 and 2016, other real estate amounted to $1.9 million and $2.0 million, respectively, and is included in other assets.

Mortgage Servicing Rights

Mortgage Servicing Rights

Originated mortgage servicing rights are recorded at their fair value at the time of sale of the underlying loan, and are amortized in proportion to and over the period of estimated net servicing income or loss.  The Company uses a valuation model that calculates the present value of future cash flows to determine the fair value of servicing rights.  In using this valuation method, the Company incorporates assumptions that market participants would use in estimating future net servicing income, which includes estimates of the servicing cost per loan, the discount rate, and prepayment speeds.  The carrying value of the originated mortgage servicing rights is included in other assets and is evaluated quarterly for impairment using these same market assumptions.  The amount of impairment recognized is the amount by which the carrying value of the capitalized servicing rights for a stratum exceeds estimated fair value.  Impairment is recognized through a valuation allowance.

Treasury Stock

Treasury Stock

Repurchases of shares of the Company’s common stock are recorded at cost as a reduction of shareholders’ equity.  Reissuance of shares of treasury stock is recorded at average cost.

Income Taxes

Income Taxes

The Company and its subsidiaries file a consolidated federal income tax return.  Provisions for income taxes are based on taxes currently payable or refundable as well as deferred taxes that are based on temporary differences between the tax basis of assets and liabilities and their reported amounts in the consolidated financial statements.  Deferred tax assets and liabilities are reported in the consolidated financial statements at currently enacted income tax rates applicable to the period in which the deferred tax assets and liabilities are expected to be realized or settled.

Benefits from tax positions should be recognized in the financial statements only when it is more likely than not that the tax position will be sustained upon examination by the appropriate taxing authority having full knowledge of all relevant information. A tax position meeting the more-likely-than-not recognition threshold should be measured at the largest amount of benefit for which the likelihood of realization upon ultimate settlement exceeds 50 percent.

Investments in Real Estate Limited Partnerships

Investments in Real Estate Limited Partnerships

The Company has investments in various real estate limited partnerships that acquire, develop, own and operate low and moderate-income housing.  The Company’s ownership interest in these limited partnerships ranges from 5.00% to 99.99% as of December 31, 2017.  These investments are made directly in Low Income Housing Tax Credit, or LIHTC, partnerships formed by third parties.  As a limited partner in these operating partnerships, we receive tax credits and tax deductions for losses incurred by the underlying properties.

The Company accounts for its ownership interest in LIHTC partnerships in accordance with Accounting Standards Update (“ASU”) 2014-01, Investments – Equity Method and Joint Ventures (Topic 323):  Accounting for Investments in Qualified Affordable Housing Projects.  The standard permits an entity to amortize the initial cost of the investment in proportion to the amount of the tax credits and other tax benefits received and recognize the net investment performance in the income statement as a component of income tax expense.  The Company has unfunded commitments of $3.2 million at year-end related to qualified affordable housing project investments, which will be funded in 2018.  There were no impairment losses during the year resulting from the forfeiture or ineligibility of tax credits related to qualified affordable housing project investments.

Repurchase Agreements

Repurchase Agreements

The Company sells certain securities under agreements to repurchase.  These agreements are treated as collateralized financing transactions.  These secured borrowings are reflected as liabilities in the accompanying consolidated statements of condition and are recorded at the amount of cash received in connection with the transaction.  Short-term securities sold under agreements to repurchase generally mature within one day from the transaction date.  Securities, generally U.S. government and federal agency securities, pledged as collateral under these financing arrangements can be repledged by the secured party.  Additional collateral may be required based on the fair value of the underlying securities.

Retirement Benefits

Retirement Benefits

The Company provides defined benefit pension benefits to eligible employees and post-retirement health and life insurance benefits to certain eligible retirees.  The Company also provides deferred compensation and supplemental executive retirement plans for selected current and former employees, officers, and directors.  Expense under these plans is charged to current operations and consists of several components of net periodic benefit cost based on various actuarial assumptions regarding future experience under the plans, including discount rate, rate of future compensation increases and expected return on plan assets.

Derivative Financial Instruments and Hedging Activities

Derivative Financial Instruments and Hedging Activities

The Company accounts for derivative financial instruments at fair value.  If certain conditions are met, a derivative may be specifically designated as (1) a hedge of the exposure to changes in the fair value of a recognized asset or liability or an unrecognized firm commitment (“fair value hedge”), (2) a hedge of the exposure to variable cash flows of a forecasted transaction or the variability of cash flows to be received or paid related to a recognized asset or liability (“cash flow hedge”), or (3) an instrument with no hedging designation (“stand-alone derivative”).  For a fair value hedge, the gain or loss on the derivative, as well as the offsetting loss or gain on the hedged item, are recognized in current earnings as fair values change.  For a cash flow hedge, the gain or loss on the derivative is reported in other comprehensive income and is reclassified into earnings in the same periods during which the hedged transaction affects earnings.  For both types of hedges, changes in the fair value of derivatives that are not highly effective in hedging the changes in fair value or expected cash flows of the hedged item are recognized immediately in current earnings.  Changes in the fair value of derivatives that do not qualify for hedge accounting are reported currently in earnings, as noninterest income.

Net cash settlements on derivatives that qualify for hedge accounting are recorded in interest income or interest expense, based on the item being hedged.  Net cash settlements on derivatives that do not qualify for hedge accounting are reported in noninterest income.  Cash flows on hedges are classified in the consolidated statement of cash flow statement the same as the cash flows of the items being hedged.

The Company formally documents the relationship between derivatives and hedged items, as well as the risk-management objective and strategy for undertaking hedge transactions at the inception of the hedging relationship.  This documentation includes linking the fair value or cash flow hedges to specific assets and liabilities on the statement of condition or to specific commitments or forecasted transactions.  The Company also formally assesses, both at the hedge’s inception and on an ongoing basis, whether the derivative instruments that are used are highly effective in offsetting changes in fair values or cash flows of the hedged items.

When hedge accounting is discontinued, subsequent changes in fair value of the derivative are recorded in noninterest income.  When a fair value hedge is discontinued, the hedged asset or liability is no longer adjusted for changes in fair value and the existing basis adjustment is amortized or accreted over the remaining life of the asset or liability.  When a cash flow hedge is discontinued, but the hedged cash flows or forecasted transactions are still expected to occur, gains or losses that were accumulated in other comprehensive income are amortized into earnings over the same periods which the hedged transactions will affect earnings.

Assets Under Management or Administration

Assets Under Management or Administration

Assets held in fiduciary or agency capacities for customers are not included in the accompanying consolidated statements of condition as they are not assets of the Company.  All fees associated with providing asset management services are recorded on an accrual basis of accounting and are included in noninterest income.

Advertising

Advertising

Advertising costs amounting to approximately $5.7 million, $3.9 million and $3.6 million for the years ending December 31, 2017, 2016 and 2015, respectively, are nondirect response in nature and expensed as incurred.

Bank Owned Life Insurance

Bank Owned Life Insurance

The Company owns life insurance policies on certain current and former employees and directors where the Bank is the beneficiary.  Bank owned life insurance is recorded at the amount that can be realized under the insurance contract at the balance sheet date, which is the cash surrender value (“CSV”) adjusted for other charges or other amounts due that are probable at settlement.  Increases in the CSV of the policies, as well as the death benefits received, net of any CSV, are recorded in noninterest income, and are not subject to income taxes.

Earnings Per Share

Earnings Per Share

Using the two-class method, basic earnings per common share is computed based upon net income available to common shareholders divided by the weighted average number of common shares outstanding during each period, which excludes the outstanding unvested restricted stock.  Diluted earnings per share is computed using the weighted average number of common shares determined for the basic earnings per common share computation plus the dilutive effect of stock options using the treasury stock method.  Stock options where the exercise price is greater than the average market price of common shares were not included in the computation of earnings per diluted share as they would have been anti-dilutive. Shares held in rabbi trusts related to deferred compensation plans are considered outstanding for purposes of computing earnings per share.

Stock-based Compensation

Stock-based Compensation

Companies are required to measure and record compensation expense for stock options and other share-based payments on the instruments’ fair value on the date of grant.  Stock-based compensation expense is recognized ratably over the requisite service period for all awards (see Note L).

Fair Values of Financial Instruments

Fair Values of Financial Instruments

The Company determines fair values based on quoted market values where available or on estimates using present values or other valuation techniques.  Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows.  In that regard, the derived fair value estimates cannot be substantiated by comparison to independent markets and, in many cases, could not be realized in immediate settlement of the instrument.  Certain financial instruments and all nonfinancial instruments are excluded from this disclosure requirement.  Accordingly, the aggregate fair value amounts presented do not represent the underlying value of the Company.  The fair values of investment securities, loans, deposits, and borrowings have been disclosed in Note R.

Reclassifications

Reclassifications

Certain reclassifications have been made to prior years’ balances to conform to the current year presentation.

Recently Adopted Accounting Pronouncements

Recently Adopted Accounting Pronouncements

In March 2016, the FASB issued ASU 2016-09, Compensation – Stock Compensation (Topic 718).  The amendments simplify several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, accounting for award forfeitures, and classification on the statement of cash flows.  The amendments were effective for public business entities for the first interim and annual reporting periods beginning after December 15, 2016 and the Company adopted the amendments as of January 1, 2017.  The new guidance requires entities to prospectively recognize all excess tax benefits and tax deficiencies related to share-based payment awards as income tax benefit or expense in the statement of income when the awards vest or are settled.  Previously, income tax benefits (or deficiencies) were reported as increases (or decreases) to additional paid-in capital to the extent that those benefits were greater than (or less than) the income tax benefits recognized in earnings during the awards’ vesting periods.  In addition, excess tax benefits and deficiencies are to be classified as an operating activity in the statement of cash flows, rather than a financing activity as required under prior accounting guidance.  The new guidance also requires employee taxes paid when an employer withholds shares for withholding tax purposes to be classified as a financing activity in the statement of cash flows.  The Company has elected to apply the changes in presentation on the consolidated statement of cash flows for excess tax benefits and deficiencies and employee taxes paid when an employer withholds shares on a retrospective basis.  The Company has also elected to continue to incorporate estimated forfeitures in the accrual of compensation expense, and this election had no impact on the Company’s consolidated financial statements.  For the year ended December 31, 2017, the effect on net income from excess tax benefits was $3.1 million, or approximately $0.06 per diluted common share.

In February 2018, the FASB issued ASU 2018-02, Income Statement – Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income.  The ASU required a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the reduction in the corporate income tax rate to 21% with the newly enacted Tax Cuts and Jobs Act.  This guidance is effective for fiscal years beginning after December 15, 2018; however, the Company chose to early adopt the new standard for the year ended December 31, 2017, as allowed under the new standard.  The amount of the reclassification for the Company was $0.6 million, as shown in the Consolidated Statement of Changes in Stockholder's Equity.

New Accounting Pronouncements

New Accounting Pronouncements

In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606).  This new guidance supersedes the revenue recognition requirements in ASC 605, Revenue Recognition, and is based on the principle that revenue is recognized to depict the transfer of goods or services to customers in an amount that reflects consideration to which the entity expects to be entitled in exchange for those goods and services. The ASU also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments and assets recognized from costs incurred to obtain or fulfill a contract.  This guidance is effective for the Company for annual and interim periods beginning after December 15, 2017.  The Company has finalized its in-depth assessment and identified the revenue line items within the scope of this new guidance.  Neither the new standard, nor any of the amendments, resulted in a material change from the Company’s current accounting for revenues because no changes in accounting were required for those financial instruments that were within scope of Topic 606.  The Company adopted this guidance on January 1, 2018 and has elected to implement using the modified retrospective application, with the cumulative effect recorded as an adjustment to opening retained earnings at January 1, 2018.  Due to immateriality, the Company will have no cumulative effect to record.  The Company is still finalizing the changes to the related disclosures.

In January 2016, the FASB issued ASU 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. This guidance addresses certain aspects of recognition, measurement, presentation and disclosure of financial instruments. The primary focus of this guidance is to supersede the guidance to classify equity securities with readily determinable fair values into different categories (trading or available-for-sale) and requires equity securities to be measured at fair value with changes in the fair value recognized through net income. This guidance requires adoption through a cumulative-effect adjustment to the balance sheet as of the beginning of the fiscal year of adoption.  This ASU is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years.  Early adoption is permitted for all companies in any interim or annual period. The Company has completed its evaluation of adoption of the new guidance on the Company’s consolidated financial statements and the impact was considered immaterial.

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). This new guidance supersedes the lease requirements in Topic 840, Leases and is based on the principle that a lessee should recognize in the statement of financial position a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term.  The accounting applied by a lessor is largely unchanged from that applied under the previous guidance.  In addition, the guidance requires an entity to separate the lease components from the nonlease components in a contract.  The ASU requires disclosures about the amount, timing, and judgments related to a reporting entity’s accounting for leases and related cash flows.  The standard is required to be applied to all leases in existence as of the date of adoption using a modified retrospective transition approach.  This guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted for all companies in any interim or annual period.  The Company occupies certain offices and uses certain equipment under non-cancelable operating lease agreements, which currently are not reflected in its consolidated statement of condition.  The Company expects to recognize lease liabilities and right of use assets associated with these lease agreements; however, the extent of the impact on the Company’s consolidated financial statements is currently under evaluation.

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments – Credit Losses (Topic 326).  This new guidance significantly changes how entities will measure credit losses for most financial assets and certain other instruments that are not measured at fair value through net income.  This ASU will replace the “incurred loss” model under existing guidance with an “expected loss” model for instruments measured at amortized cost, and require entities to record allowances for available-for-sale debt securities rather than reduce the carrying amount, as they do today under the other-than-temporary impairment model.  This ASU also simplifies the accounting model for purchased credit-impaired debt securities and loans.  This guidance requires adoption through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is adopted.  This ASU is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years.  Early adoption is permitted for all companies as of fiscal years beginning after December 15, 2018, including interim periods within those fiscal years.  The Company is currently evaluating the impact the guidance will have on the Company’s consolidated financial statements, and expects a change in the allowance for loan losses resulting from the change to expected losses for the estimated life of the financial asset, including an allowance for debt securities. The amount of the change in the allowance for loan losses resulting from the new guidance will be impacted by the portfolio composition and asset quality at the adoption date, as well as economic conditions and forecasts at the time of adoption.

In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230). The amendments provide guidance on the following eight specific cash flow issues: 1) debt prepayment or debt extinguishment costs; 2) settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effective interest rate of the borrowing; 3) contingent consideration payments made after a business combination; 4) proceeds from the settlement of insurance claims; 5) proceeds from the settlement of corporate-owned life insurance policies, including bank-owned life insurance policies; 6) distributions received from equity method investees; 7) beneficial interests in securitization transactions; and 8) separately identifiable cash flows and application of the predominance principle. This ASU is effective for fiscal years beginning after December 31, 2017, including interim periods within those fiscal years.  The Company adopted this guidance on January 1, 2018.  As this guidance only affects the classification within the statement of cash flows, this ASU will not have a material impact on the Company’s consolidated financial statements.

In January 2017, the FASB issued ASU No. 2017-04, Intangibles-Goodwill and Other (Topic 350). The amendments simplify how an entity is required to test goodwill for impairment by eliminating the requirement to measure a goodwill impairment loss by comparing the implied fair value of a reporting unit’s goodwill with the carrying amount of that goodwill.  Instead, an entity will perform its goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount, and recognize an impairment charge for the amount by which the carrying amount of the reporting unit exceeds its fair value.  Impairment loss recognized under this new guidance will be limited to the goodwill allocated to the reporting unit.  This ASU is effective prospectively for the Company for annual or interim goodwill impairment tests in fiscal years beginning after December 15, 2019.  Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017.  This ASU did not have a material impact on the Company’s consolidated financial statements.

In March 2017, the FASB issued ASU No. 2017-07, Compensation – Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost.  This new guidance requires the service cost component of net periodic pension and postretirement benefit costs to be presented separately from other components of net benefit cost in the statement of income.  This ASU is effective for the Company for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years.  The Company adopted this guidance on January 1, 2018.  This ASU will not have a material impact on the Company’s consolidated financial statements.

In August 2017, the FASB issued ASU No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities.  This new guidance amends current guidance to better align hedge accounting with risk management activities and reduce the complexity involved in applying hedge accounting.  Under this new guidance, the concept of hedge ineffectiveness will be eliminated.  Ineffective income generated by cash flow and net investment hedges will be recognized in the same financial reporting period and income statement line item as effective income, so as to reflect the full cost of hedging at one time and in one place. Ineffective income generated by fair value hedges will continue to be reflected in current period earnings; however, it will be recognized in the same income statement line item as effective income. The guidance will also allow any contractually specified variable rate to be designated as the hedged risk in a cash flow hedge.  With respect to fair value hedges of interest rate risk, the guidance will allow changes in the fair value of the hedged item to be calculated solely using changes in the benchmark interest rate component of the instrument’s total contractual coupon cash flows. This ASU is effective for the Company for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years.  Early adoption is permitted, including adoption in an interim period.  This ASU is not expected to have a material impact on the Company’s consolidated financial statements.

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ACQUISITIONS (Tables)

12 Months Ended

Dec. 31, 2017

ACQUISITIONS [Abstract]

Estimated Fair Value of Assets Acquired and Liabilities Assumed

The following table summarizes the estimated fair value of the assets acquired and liabilities assumed after considering the measurement period adjustments described above:

	2017												2016		2015
(000s omitted)	NRS			Merchants			Other (1)			Total			WJL		Oneida
Consideration paid :
Cash (2)	$	70,073		$	82,898		$	6,775		$	159,746		$	575	$	56,266
Community Bank System, Inc. common stock		78,483			262,254			2,395			343,132			0		102,202
Total net consideration paid		148,556			345,152			9,170			502,878			575		158,468
Recognized amounts of identifiable assets acquired and liabilities assumed:
Cash and cash equivalents		11,063			40,730			339			52,132			0		81,772
Investment securities		20,294			370,648			0			390,942			0		225,729
Loans		0			1,488,157			0			1,488,157			0		399,422
Premises and equipment		411			16,608			27			17,046			0		22,212
Accrued interest receivable		72			4,773			0			4,845			0		1,133
Other assets		8,088			51,585			583			60,256			0		26,529
Core deposit intangibles		0			23,214			0			23,214			0		2,570
Other intangibles		60,200			2,857			5,626			68,683			288		9,994
Deposits		0			(1,448,406	)		0			(1,448,406	)		0		(699,241	)
Other liabilities		(28,002	)		(11,750	)		(1,217	)		(40,969	)		0		(1,333	)
Short-term advances		0			(80,000	)		0			(80,000	)		0		0
Securities sold under agreement to repurchase, short-term		0			(278,076	)		0			(278,076	)		0		0
Long-term debt		0			(3,615	)		0			(3,615	)		0		0
Subordinated debt held by unconsolidated subsidiary trusts		0			(20,619	)		0			(20,619	)		0		0
Total identifiable assets, net		72,126			156,106			5,358			233,590			288		68,787
Goodwill	$	76,430		$	189,046		$	3,812		$	269,288		$	287	$	89,681

⁽¹⁾ Includes amounts related to the BAS, Dryfoos, NECM and GBR acquisitions.

⁽²⁾ Includes NECM $0.2 million contingent cash payment consideration.

Summary of Loans Acquired

The following is a summary of the loans acquired from Merchants at the date of acquisition:

(000s omitted)	Acquired Impaired Loans			Acquired Non-impaired Loans			Total Acquired Loans
Contractually required principal and interest at acquisition	$	15,454		$	1,872,574		$	1,888,028
Contractual cash flows not expected to be collected		(5,385	)		(14,753	)		(20,138	)
Expected cash flows at acquisition		10,069			1,857,821			1,867,890
Interest component of expected cash flows		(793	)		(378,940	)		(379,733	)
Fair value of acquired loans	$	9,276		$	1,478,881		$	1,488,157

Pro Forma Financial Information

The pro forma information set forth below reflects the historical results of Merchants and NRS combined with the Company’s consolidated statement of income with adjustments related to (a) certain purchase accounting fair value adjustments and (b) amortization of customer lists and core deposit intangibles.  Acquisition expenses related to the Merchants and NRS transactions totaling $25.7 million for the year ended December 31, 2017 were included in the pro forma information as if they were incurred in 2016.

	Pro Forma (Unaudited) Year Ended December 31,
(000’s omitted)	2017		2016
Total revenue, net of interest expense	$	546,977	$	536,183
Net income		176,257		109,186

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INVESTMENT SECURITIES (Tables)

12 Months Ended

Dec. 31, 2017

INVESTMENT SECURITIES [Abstract]

Amortized Cost and Estimated Fair Value of Investment Securities

The amortized cost and estimated fair value of investment securities as of December 31 are as follows:

	2017								2016
(000's omitted)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value		Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Available-for-Sale Portfolio:
U.S. Treasury and agency securities	$	2,043,023	$	15,886	$	4,838	$	2,054,071	$	1,876,358	$	28,522	$	2,118	$	1,902,762
Obligations of state and political subdivisions		514,949		14,064		57		528,956		582,655		13,389		1,054		594,990
Government agency mortgage-backed securities		358,180		3,121		3,763		357,538		232,657		5,040		2,467		235,230
Corporate debt securities		2,648		0		25		2,623		5,716		2		31		5,687
Government agency collateralized mortgage obligations		88,097		155		878		87,374		9,225		310		0		9,535
Marketable equity securities		251		275		0		526		252		200		0		452
Total available-for-sale portfolio	$	3,007,148	$	33,501	$	9,561	$	3,031,088	$	2,706,863	$	47,463	$	5,670	$	2,748,656
Other Securities:
Federal Home Loan Bank common stock	$	9,896					$	9,896	$	12,191					$	12,191
Federal Reserve Bank common stock		30,690						30,690		19,781						19,781
Certificates of deposit		3,865						3,865		0						0
Other equity securities		5,840						5,840		3,764						3,764
Total other securities	$	50,291					$	50,291	$	35,736					$	35,736

Summary of Investment Securities That Have Been in a Continuous Unrealized Loss Position for Less Than or Greater Than Twelve Months

A summary of investment securities that have been in a continuous unrealized loss position for less than or greater than twelve months is as follows:

As of December 31, 2017

		Less than 12 Months					12 Months or Longer					Total
(000's omitted)	#	Fair Value		Gross Unrealized Losses		#	Fair Value		Gross Unrealized Losses		#	Fair Value		Gross Unrealized Losses
Available-for-Sale Portfolio:
U.S. Treasury and agency securities	44	$	699,709	$	4,838	0	$	0	$	0	44	$	699,709	$	4,838
Obligations of state and political subdivisions	45		23,432		57	0		0		0	45		23,432		57
Government agency mortgage-backed securities	120		185,716		1,433	55		75,712		2,330	175		261,428		3,763
Corporate debt securities	1		2,623		25	0		0		0	1		2,623		25
Government agency collateralized mortgage obligations	39		80,041		878	1		1		0	40		80,042		878
Total available-for-sale investment portfolio	249	$	991,521	$	7,231	56	$	75,713	$	2,330	305	$	1,067,234	$	9,561

As of December 31, 2016

		Less than 12 Months					12 Months or Longer					Total
(000's omitted)	#	Fair Value		Gross Unrealized Losses		#	Fair Value		Gross Unrealized Losses		#	Fair Value		Gross Unrealized Losses
Available-for-Sale Portfolio:
U.S. Treasury and agency securities	13	$	449,242	$	2,118	0	$	0	$	0	13	$	449,242	$	2,118
Obligations of state and political subdivisions	197		102,106		1,054	0		0		0	197		102,106		1,054
Government agency mortgage-backed securities	57		83,862		1,637	15		21,788		830	72		105,650		2,467
Corporate debt securities	1		2,677		31	0		0		0	1		2,677		31
Government agency collateralized mortgage obligations	0		0		0	2		2		0	2		2		0
Total available-for-sale investment portfolio	268	$	637,887	$	4,840	17	$	21,790	$	830	285	$	659,677	$	5,670

Amortized Cost and Estimated Fair Value of Debt Securities by Contractual Maturity

The amortized cost and estimated fair value of debt securities at December 31, 2017, by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.  Securities not due at a single maturity date are shown separately.

	Available-for-Sale
(000's omitted)	Amortized Cost		Fair Value
Due in one year or less	$	45,966	$	46,042
Due after one through five years		1,565,423		1,572,634
Due after five years through ten years		758,742		769,828
Due after ten years		190,489		197,146
Subtotal		2,560,620		2,585,650
Government agency mortgage-backed securities		358,180		357,538
Government agency collateralized mortgage obligations		88,097		87,374
Total	$	3,006,897	$	3,030,562

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LOANS (Tables)

12 Months Ended

Dec. 31, 2017

Accounts, Notes, Loans and Financing Receivable [Line Items]

Schedule of Loans Receivable, Net

The balances of these classes at December 31 are summarized as follows:

(000's omitted)	2017			2016
Consumer mortgage	$	2,220,298		$	1,819,701
Business lending		2,424,223			1,490,076
Consumer indirect		1,011,978			1,044,972
Consumer direct		179,929			191,815
Home equity		420,329			401,998
Gross loans, including deferred origination costs		6,256,757			4,948,562
Allowance for loan losses		(47,583	)		(47,233	)
Loans, net of allowance for loan losses	$	6,209,174		$	4,901,329

Summary of Aggregate Amounts Loaned to Related Parties

Following is a summary of the aggregate amount of such loans during 2017 and 2016.

(000's omitted)	2017			2016
Balance at beginning of year	$	10,950		$	11,337
New loans		16,617			4,959
Payments		(5,223	)		(5,346	)
Balance at end of year	$	22,344		$	10,950

Outstanding Principal Balance and Related Carrying Amount of Acquired Loans

The outstanding principal balance and the related carrying amount of acquired loans included in the Consolidated Statement of Condition at December 31 are as follows:

(000's omitted)	2017		2016
Credit impaired acquired loans:
Outstanding principal balance	$	13,242	$	6,354
Carrying amount		10,115		5,553
Non-impaired acquired loans:
Outstanding principal balance		1,658,780		497,308
Carrying amount		1,626,979		489,807
Total acquired loans:
Outstanding principal balance		1,672,022		503,662
Carrying amount		1,637,094		495,360

Schedule of Accretable Discount Related to Credit Impaired Acquired Loans

The changes in the accretable discount related to the credit impaired acquired loans are as follows:

(000's omitted)	2017			2016
Balance at beginning of year	$	498		$	810
Merchants acquisition		793			0
Accretion recognized		(905	)		(455	)
Net reclassification to accretable from nonaccretable		590			143
Balance at end of year	$	976		$	498

Aged Analysis of Past Due Loans by Class

The following is an aged analysis of the Company’s past due loans by class as of December 31, 2017:

Legacy Loans (excludes loans acquired after January 1, 2009)

(000’s omitted)	Past Due 30 - 89 days		90+ Days Past Due and Still Accruing		Nonaccrual		Total Past Due		Current		Total Loans
Consumer mortgage	$	13,564	$	1,500	$	10,722	$	25,786	$	1,728,823	$	1,754,609
Business lending		2,283		571		3,944		6,798		1,369,801		1,376,599
Consumer indirect		14,197		295		0		14,492		977,344		991,836
Consumer direct		1,875		48		0		1,923		172,556		174,479
Home equity		1,116		94		1,354		2,564		319,576		322,140
Total	$	33,035	$	2,508	$	16,020	$	51,563	$	4,568,100	$	4,619,663

Acquired Loans (includes loans acquired after January 1, 2009)

(000’s omitted)	Past Due 30 - 89 days		90+ Days Past Due and Still Accruing		Nonaccrual		Total Past Due		Acquired Impaired(1)		Current		Total Loans
Consumer mortgage	$	2,603	$	26	$	3,066	$	5,695	$	0	$	459,994	$	465,689
Business lending		4,661		0		4,328		8,989		10,115		1,028,520		1,047,624
Consumer indirect		245		8		0		253		0		19,889		20,142
Consumer direct		100		0		0		100		0		5,350		5,450
Home equity		634		170		1,326		2,130		0		96,059		98,189
Total	$	8,243	$	204	$	8,720	$	17,167	$	10,115	$	1,609,812	$	1,637,094

⁽¹⁾ Acquired impaired loans were not classified as nonperforming assets as the loans are considered to be performing under ASC 310-30.  As a result interest income, through the accretion of the difference between the carrying amount of the loans and the expected cashflows, is being recognized on all acquired impaired loans.

The following is an aged analysis of the Company’s past due loans by class as of December 31, 2016:

Legacy Loans (excludes loans acquired after January 1, 2009)

(000’s omitted)	Past Due 30 - 89 days		90+ Days Past Due and Still Accruing		Nonaccrual		Total Past Due		Current		Total Loans
Consumer mortgage	$	11,379	$	1,180	$	11,352	$	23,911	$	1,635,849	$	1,659,760
Business lending		3,921		145		3,811		7,877		1,269,789		1,277,666
Consumer indirect		13,883		166		0		14,049		1,000,776		1,014,825
Consumer direct		1,549		58		0		1,607		180,315		181,922
Home equity		1,250		414		1,437		3,101		315,928		319,029
Total	$	31,982	$	1,963	$	16,600	$	50,545	$	4,402,657	$	4,453,202

Acquired Loans (includes loans acquired after January 1, 2009)

(000’s omitted)	Past Due 30 - 89 days		90+ Days Past Due and Still Accruing		Nonaccrual		Total Past Due		Acquired Impaired(1)		Current		Total Loans
Consumer mortgage	$	1,539	$	205	$	2,332	$	4,076	$	0	$	155,865	$	159,941
Business lending		528		0		1,252		1,780		5,553		205,077		212,410
Consumer indirect		231		3		0		234		0		29,913		30,147
Consumer direct		231		0		0		231		0		9,662		9,893
Home equity		778		905		435		2,118		0		80,851		82,969
Total	$	3,307	$	1,113	$	4,019	$	8,439	$	5,553	$	481,368	$	495,360

⁽¹⁾ Acquired impaired loans were not classified as nonperforming assets as the loans are considered to be performing under ASC 310-30.  As a result interest income, through the accretion of the difference between the carrying amount of the loans and the expected cashflows, is being recognized on all acquired impaired loans.

Summary of Non-Business Impaired Loans

A summary of individually evaluated impaired loans as of December 31, 2017 and 2016 is as follows:

(000’s omitted)	2017		2016
Loans with allowance allocation	$	5,125	$	1,109
Loans without allowance allocation		884		556
Carrying balance		6,009		1,665
Contractual balance		9,165		3,340
Specifically allocated allowance		804		477
Average impaired loans		9,517		4,683
Interest income recognized		0		0

Troubled Debt Restructurings on Financing Receivables

Information regarding TDRs as of December 31, 2017 and December 31, 2016 is as follows

	December 31, 2017												December 31, 2016
(000’s omitted)	Nonaccrual				Accruing				Total				Nonaccrual				Accruing				Total
		#	Amount			#	Amount			#	Amount			#	Amount			#	Amount			#	Amount
Consumer mortgage		51	$	2,265		44	$	1,750		95	$	4,015		36	$	1,520		45	$	1,956		81	$	3,476
Business lending		8		218		7		501		15		719		6		91		5		690		11		781
Consumer indirect		0		0		71		883		71		883		0		0		78		771		78		771
Consumer direct		0		0		25		69		25		69		0		0		23		65		23		65
Home equity		13		245		7		204		20		449		14		221		7		216		21		437
Total		72	$	2,728		154	$	3,407		226	$	6,135		56	$	1,832		158	$	3,698		214	$	5,530

The following table presents information related to loans modified in a TDR during the years ended December 31, 2017 and 2016.  Of the loans noted in the table below, all loans for the years ended December 31, 2017 and December 31, 2016, were modified due to a Chapter 7 bankruptcy as described previously.  The financial effects of these restructurings were immaterial.

	December 31, 2017				December 31, 2016
(000’s omitted)		#	Amount			#	Amount
Consumer mortgage		23	$	1,254		9	$	597
Business lending		8		412		0		0
Consumer indirect		33		490		33		459
Consumer direct		6		17		3		51
Home equity		4		95		3		50
Total		74	$	2,268		48	$	1,157

Schedule of Allowance for Loan Losses by Class

The following presents by class the activity in the allowance for loan losses:

(000’s omitted)	Consumer Mortgage			Business Lending			Consumer Indirect			Consumer Direct			Home Equity			Unallocated			Acquired Impaired			Total
Balance at December 31, 2014	$	10,286		$	15,787		$	11,544		$	3,083		$	2,701		$	1,767		$	173		$	45,341
Charge-offs		(1,374	)		(2,146	)		(6,714	)		(1,490	)		(244	)		0			(103	)		(12,071	)
Recoveries		80			877			3,943			722			62			0			0			5,684
Provision		1,206			1,231			3,649			682			147			(566	)		98			6,447
Balance at December 31, 2015		10,198			15,749			12,422			2,997			2,666			1,201			168			45,401
Charge-offs		(647	)		(1,872	)		(7,643	)		(1,706	)		(218	)		0			(97	)		(12,183	)
Recoveries		115			616			4,168			901			139			0			0			5,939
Provision		428			2,727			4,835			787			(188	)		(550	)		37			8,076
Balance at December 31, 2016		10,094			17,220			13,782			2,979			2,399			651			108			47,233
Charge-offs		(707	)		(4,959	)		(8,456	)		(2,081	)		(284	)		0			(270	)		(16,757	)
Recoveries		50			656			4,516			849			52			0			0			6,123
Provision		1,028			4,340			3,626			1,292			(60	)		449			309			10,984
Balance at December 31, 2017	$	10,465		$	17,257		$	13,468		$	3,039		$	2,107		$	1,100		$	147		$	47,583

Business Lending [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Schedule of Loans by Credit Quality Indicator

The following table shows the amount of business lending loans by credit quality category:

	December 31, 2017						December 31, 2016
(000’s omitted)	Legacy		Acquired		Total		Legacy		Acquired		Total
Pass	$	1,170,156	$	963,981	$	2,134,137	$	1,051,005	$	162,165	$	1,213,170
Special mention		129,076		37,321		166,397		135,602		29,690		165,292
Classified		77,367		34,628		111,995		90,585		15,002		105,587
Doubtful		0		1,579		1,579		474		0		474
Acquired impaired		0		10,115		10,115		0		5,553		5,553
Total	$	1,376,599	$	1,047,624	$	2,424,223	$	1,277,666	$	212,410	$	1,490,076

All Other Loans [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Schedule of Loans by Credit Quality Indicator

The following tables detail the balances in all loan categories except for business lending at December 31, 2017:

Legacy loans (excludes loans acquired after January 1, 2009)

(000’s omitted)	Consumer Mortgage		Consumer Indirect		Consumer Direct		Home Equity		Total
Performing	$	1,742,387	$	991,541	$	174,431	$	320,692	$	3,229,051
Nonperforming		12,222		295		48		1,448		14,013
Total	$	1,754,609	$	991,836	$	174,479	$	322,140	$	3,243,064

Acquired loans (includes loans acquired after January 1, 2009)

(000’s omitted)	Consumer Mortgage		Consumer Indirect		Consumer Direct		Home Equity		Total
Performing	$	462,597	$	20,134	$	5,450	$	96,693	$	584,874
Nonperforming		3,092		8		0		1,496		4,596
Total	$	465,689	$	20,142	$	5,450	$	98,189	$	589,470

The following table details the balances in all other loan categories at December 31, 2016:

Legacy loans (excludes loans acquired after January 1, 2009)

(000’s omitted)	Consumer Mortgage		Consumer Indirect		Consumer Direct		Home Equity		Total
Performing	$	1,647,228	$	1,014,659	$	181,864	$	317,178	$	3,160,929
Nonperforming		12,532		166		58		1,851		14,607
Total	$	1,659,760	$	1,014,825	$	181,922	$	319,029	$	3,175,536

Acquired loans (includes loans acquired after January 1, 2009)

(000’s omitted)	Consumer Mortgage		Consumer Indirect		Consumer Direct		Home Equity		Total
Performing	$	157,404	$	30,144	$	9,893	$	81,629	$	279,070
Nonperforming		2,537		3		0		1,340		3,880
Total	$	159,941	$	30,147	$	9,893	$	82,969	$	282,950

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PREMISES AND EQUIPMENT (Tables)

12 Months Ended

Dec. 31, 2017

PREMISES AND EQUIPMENT [Abstract]

Components of Premises and Equipment

Premises and equipment consist of the following at December 31:

(000's omitted)	2017			2016
Land and land improvements	$	23,869		$	22,585
Bank premises		131,647			116,663
Equipment and construction in progress		86,059			80,527
Premises and equipment, gross		241,575			219,775
Accumulated depreciation		(118,182	)		(107,457	)
Premises and equipment, net	$	123,393		$	112,318

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GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS (Tables)

12 Months Ended

Dec. 31, 2017

GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS [Abstract]

Gross Carrying Amount and Accumulated Amortization for Each Type of Identifiable Intangible Asset

The gross carrying amount and accumulated amortization for each type of identifiable intangible asset are as follows:

	December 31, 2017							December 31, 2016
(000's omitted)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Amortizing intangible assets:
Core deposit intangibles	$	62,902	$	(37,877	)	$	25,025	$	39,688	$	(32,581	)	$	7,107
Other intangibles		86,535		(20,902	)		65,633		17,853		(9,258	)		8,595
Total amortizing intangibles	$	149,437	$	(58,779	)	$	90,658	$	57,541	$	(41,839	)	$	15,702

Estimated Aggregate Amortization Expense

The estimated aggregate amortization expense for each of the five succeeding fiscal years ended December 31 is as follows:

2018	$	17,872
2019		15,033
2020		12,497
2021		10,665
2022		9,165
Thereafter		25,426
Total	$	90,658

Components of Goodwill

Shown below are the components of the Company’s goodwill at December 31, 2017 and 2016:

(000’s omitted)	Year Ended December 31, 2015			Activity		Year Ended December 31, 2016			Activity		Year Ended December 31, 2017
Goodwill	$	468,076		$	1,890	$	469,966		$	269,288	$	739,254
Accumulated impairment		(4,824	)		0		(4,824	)		0		(4,824	)
Goodwill, net	$	463,252		$	1,890	$	465,142		$	269,288	$	734,430

Changes in Carrying Value of MSRs and Associated Valuation Allowance

The following table summarizes the changes in carrying value of MSRs and the associated valuation allowance:

(000’s omitted)	2017			2016
Carrying value before valuation allowance at beginning of period	$	1,435		$	1,472
Additions		358			481
Merchants acquisition		64			0
Amortization		(499	)		(518	)
Carrying value before valuation allowance at end of period		1,358			1,435
Valuation allowance balance at beginning of period		0			0
Impairment charges		0			(226	)
Impairment recoveries		0			226
Valuation allowance balance at end of period		0			0
Net carrying value at end of period	$	1,358		$	1,435
Fair value of MSRs at end of period	$	2,473		$	1,928
Principal balance of loans sold during the year	$	32,937		$	45,852
Principal balance of loans serviced for others	$	358,518		$	365,374
Custodial escrow balances maintained in connection with loans serviced for others	$	5,363		$	5,603

Summary of Key Economic Assumptions Used to Estimate Value of MSRs

The following table summarizes the key economic assumptions used to estimate the value of the MSRs at December 31:

	2017			2016
Weighted-average contractual life (in years)		21.3			20.8
Weighted-average constant prepayment rate (CPR)		11.1	%		15.1	%
Weighted-average discount rate		3.3	%		3.5	%

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DEPOSITS (Tables)

12 Months Ended

Dec. 31, 2017

DEPOSITS [Abstract]

Components of Deposits

Deposits consist of the following at December 31:

(000's omitted)	2017		2016
Noninterest checking	$	2,293,057	$	1,646,039
Interest checking		1,830,914		1,644,029
Savings		1,421,512		1,303,851
Money market		2,124,633		1,778,907
Time		774,304		703,128
Total deposits	$	8,444,420	$	7,075,954

Maturities of Time Deposits

The approximate maturities of time deposits at December 31, 2017 are as follows:

(000's omitted)	All Accounts		Accounts $250,000 or Greater
2018	$	545,389	$	51,875
2019		100,833		5,958
2020		59,849		7,445
2021		34,582		1,807
2022		33,400		601
Thereafter		251		0
Total	$	774,304	$	67,686

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BORROWINGS (Tables)

12 Months Ended

Dec. 31, 2017

BORROWINGS [Abstract]

Outstanding Borrowings

Outstanding borrowings at December 31 are as follows:

(000's omitted)	2017		2016
FHLB overnight advance	$	24,000	$	146,200
Subordinated debt held by unconsolidated subsidiary trusts,
net of discount of $332 and $357, respectively		122,814		102,170
Securities sold under agreement to repurchase, short term		337,011		0
FHLB Long term advances		2,071		0
Total borrowings	$	485,896	$	248,370

Borrowings by Contractual Maturity Dates

Borrowings at December 31, 2017 have contractual maturity dates as follows:

(000's omitted, except rate)	Carrying Value		Weighted-average Rate at December 31, 2017
January 2, 2018	$	361,011		0.54	%
July 3, 2023		601		2.25	%
October 23, 2023		515		1.50	%
October 1, 2025		329		1.50	%
March 1, 2029		626		2.50	%
July 31, 2031		24,875		4.96	%
December 15, 2034		20,619		3.54	%
December 15, 2036		77,320		3.24	%
Total	$	485,896		1.34	%

Terms of Preferred Securities

The terms of the preferred securities of each trust are as follows:

Trust	Issuance Date	Par Amount	Interest Rate	Maturity Date	Call Price
CST III	7/31/2001	$24.5 million	3 month LIBOR plus 3.58% (4.96%)	7/31/2031	Par
CCT IV	12/8/2006	$75.0 million	3 month LIBOR plus 1.65% (3.24%)	12/15/2036	Par
MBVT I	12/15/2004	$20.6 million	3 month LIBOR plus 1.95% (3.54%)	12/15/2034	Par

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INCOME TAXES (Tables)

12 Months Ended

Dec. 31, 2017

INCOME TAXES [Abstract]

Provision for Income Taxes

The provision for income taxes for the years ended December 31 is as follows:

(000's omitted)	2017			2016		2015
Current:
Federal	$	31,152		$	32,829	$	27,663
State and other		6,788			4,890		2,608
Deferred:
Federal		(28,146	)		11,444		9,604
State and other		(546	)		1,622		1,112
Provision for income taxes	$	9,248		$	50,785	$	40,987

Components of Net Deferred Tax Liability

Components of the net deferred tax liability, included in other liabilities, as of December 31 are as follows:

(000's omitted)	2017			2016
Allowance for loan losses	$	11,675		$	18,366
Employee benefits		4,216			6,311
Debt extinguishment		0			299
Other, net		0			5,202
Deferred tax asset		15,891			30,178
Investment securities		22,690			32,839
Tax-deductible goodwill		39,154			43,504
Loan origination costs		6,109			8,228
Depreciation		2,372			71
Mortgage servicing rights		330			548
Pension		13,228			18,194
Other, net		542			0
Deferred tax liability		84,425			103,384
Net deferred tax liability	$	(68,534	)	$	(73,206	)

Reconciliation of Differences between Federal Statutory Income Tax Rate and Effective Tax Rate

A reconciliation of the differences between the federal statutory income tax rate and the effective tax rate for the years ended December 31 is shown in the following table:

	2017			2016			2015
Federal statutory income tax rate		35.0	%		35.0	%		35.0	%
Increase (reduction) in taxes resulting from:
Tax-exempt interest		(3.8	)		(4.0	)		(5.0	)
State income taxes, net of federal benefit		2.5			2.7			1.8
Stock-based compensation		(2.0	)		0			0
Federal deferred tax revaluation adjustment		(23.7	)		0			0
Other, net		(2.2	)		(0.9	)		(0.8	)
Effective income tax rate		5.8	%		32.8	%		31.0	%

Reconciliation of Unrecognized Tax Benefits

A reconciliation of the unrecognized tax benefits for the years ended December 31 is shown in the following table:

(000’s omitted)	2017			2016			2015
Unrecognized tax benefits at beginning of year	$	92		$	127		$	162
Changes related to:
Lapse of statutes of limitations		(68	)		(35	)		(35	)
Unrecognized tax benefits at end of year	$	24		$	92		$	127

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BENEFIT PLANS (Tables)

12 Months Ended

Dec. 31, 2017

BENEFIT PLANS [Abstract]

Funded Status of Plans Reconciled with Amounts Reported in Consolidated Statements of Condition

Using a measurement date of December 31, the following table shows the funded status of the Company's plans reconciled with amounts reported in the Company's consolidated statements of condition:

	Pension Benefits						Post-retirement Benefits
(000's omitted)	2017			2016			2017			2016
Change in benefit obligation:
Benefit obligation at the beginning of year	$	127,084		$	127,134		$	1,806		$	1,918
Service cost		4,181			4,106			0			0
Interest cost		5,717			5,624			76			82
Plan amendment / acquisition		11,646			22			0			0
Participant contributions		0			0			467			516
Deferred actuarial loss/(gain)		8,978			(1,628	)		245			174
Benefits paid		(10,156	)		(8,174	)		(809	)		(884	)
Benefit obligation at end of year		147,450			127,084			1,785			1,806
Change in plan assets:
Fair value of plan assets at beginning of year		180,400			172,026			0			0
Actual return of plan assets		22,954			14,402			0			0
Participant contributions		0			0			467			516
Employer contributions		9,839			2,146			342			368
Plan acquisition		14,070			0			0			0
Benefits paid		(10,156	)		(8,174	)		(809	)		(884	)
Fair value of plan assets at end of year		217,107			180,400			0			0
Over/(Under) funded status at year end	$	69,657		$	53,316		$	(1,785	)	$	(1,806	)
Amounts recognized in the consolidated statement of condition were:
Other assets	$	81,000		$	64,709		$	0		$	0
Other liabilities		(11,343	)		(11,393	)		(1,785	)		(1,806	)
Amounts recognized in accumulated other comprehensive income (loss) (“AOCI”) were:
Net loss	$	26,935		$	28,323		$	420		$	183
Net prior service cost (credit)		2,944			2,264			(1,622	)		(1,801	)
Pre-tax AOCI		29,879			30,587			(1,202	)		(1,618	)
Taxes		(7,340	)		(11,622	)		296			614
AOCI at year end	$	22,539		$	18,965		$	(906	)	$	(1,004	)

Amounts Recognized in Accumulated Other Comprehensive Income, Net of Tax

Amounts recognized in accumulated other comprehensive income, net of tax, for the year ended December 31, are as follows:

	Pension Benefits						Post-retirement Benefits
(000's omitted)	2017			2016			2017		2016
Prior service cost/(credit)	$	424		$	(26	)	$	111	$	110
Net (gain) loss		(851	)		(3,517	)		148		111
Total	$	(427	)	$	(3,543	)	$	259	$	221

Estimated Costs, Net of Tax, That Will Be Amortized from Accumulated Other Comprehensive (Income) Loss into Net Periodic (Income) Cost over Next Fiscal Year

The estimated costs, net of tax, that will be amortized from accumulated other comprehensive (income) loss into net periodic (income) cost over the next fiscal year are as follows:

(000's omitted)	Pension Benefits			Post-retirement Benefits
Prior service credit	$	(330	)	$	(179	)
Net loss		1,054			18
Total	$	724		$	(161	)

Weighted Average Assumptions Used To Determine Benefit Obligations

The weighted-average assumptions used to determine the benefit obligations as of December 31 are as follows:

	Pension Benefits						Post-retirement Benefits
	2017			2016			2017			2016
Discount rate		4.00	%		4.50	%		4.00	%		4.40	%
Expected return on plan assets		7.00	%		7.00	%		N/A			N/A
Rate of compensation increase		3.50	%		3.50	%		N/A			N/A

Net Periodic Benefit Cost

The net periodic benefit cost as of December 31 is as follows:

	Pension Benefits									Post-retirement Benefits
(000's omitted)	2017			2016			2015			2017			2016			2015
Service cost	$	4,181		$	4,106		$	3,324		$	0		$	0		$	0
Interest cost		5,717			5,624			5,506			76			82			87
Expected return on plan assets		(13,354	)		(11,842	)		(12,169	)		0			0			0
Plan amendment		0			20			0			0			0			0
Amortization of unrecognized net loss/(gain)		767			1,508			1,466			8			(5	)		(13	)
Amortization of prior service cost		55			43			8			(179	)		(179	)		(179	)
Net periodic (benefit)	$	(2,634	)	$	(541	)	$	(1,865	)	$	(95	)	$	(102	)	$	(105	)

Weighted-Average Assumptions Used to Determine Benefit Obligations and Net Periodic Pension Cost

The weighted-average assumptions used to determine the net periodic pension cost for the years ended December 31 are as follows:

	Pension Benefits									Post-retirement Benefits
	2017			2016			2015			2017			2016			2015
Discount rate		4.40	%		4.70	%		4.50	%		4.40	%		4.70	%		4.50	%
Expected return on plan assets		7.00	%		7.00	%		7.00	%		N/A			N/A			N/A
Rate of compensation increase		3.50	%		3.50	%		3.50	%		N/A			N/A			N/A

Amount of Expected Benefit Payments

The amount of benefit payments that are expected to be paid over the next ten years are as follows:

(000's omitted)	Pension Benefits		Post-retirement Benefits
2018	$	8,702	$	145
2019		9,163		142
2020		9,404		139
2021		9,943		136
2022		10,378		133
2023-2027		56,064		618

Fair Value of Defined Benefit Plan Assets by Asset Category

The fair values of the Company’s defined benefit pension plan assets at December 31, 2017 by asset category are as follows:

Asset category (000’s omitted)	Quoted Prices in Active Markets for Identical Assets Level 1		Significant Observable Inputs Level 2		Significant Unobservable Inputs Level 3		Total
Money Market Accounts	$	0	$	10,381	$	0	$	10,381
Equity securities:
U.S. large-cap		53,154		0		0		53,154
U.S mid/small cap		26,309		0		0		26,309
CBU stock		8,344		0		0		8,344
International		47,723		0		0		47,723
		135,530		0		0		135,530
Fixed income securities:
Government securities		13,929		9,686		0		23,615
Investment grade bonds		19,278		0		0		19,278
High yield(a)		16,297		0		0		16,297
		49,504		9,686		0		59,190
Other investments (b)		11,302		73		0		11,375
Total (c)	$	196,336	$	20,140	$	0	$	216,476

The fair values of the Company’s defined benefit pension plan assets at December 31, 2016 by asset category are as follows:

Asset category (000’s omitted)	Quoted Prices in Active Markets for Identical Assets Level 1		Significant Observable Inputs Level 2		Significant Unobservable Inputs Level 3		Total
Money Market Accounts	$	103	$	8,048	$	0	$	8,151
Equity securities:
U.S. large-cap		43,235		0		0		43,235
U.S mid/small cap		19,032		0		0		19,032
CBU stock		7,417		0		0		7,417
International		27,064		0		0		27,064
		96,748		0		0		96,748
Fixed income securities:
Government securities		25,375		5,863		0		31,238
Investment grade bonds		15,253		0		0		15,253
High yield(a)		16,615		0		0		16,615
		57,243		5,863		0		63,106
Other investments (b)		12,023		58		0		12,081
Total (c)	$	166,117	$	13,969	$	0	$	180,086

(a)	This category is exchange-traded funds representing a diversified index of high yield corporate bonds.
(b)	This category is comprised of exchange-traded funds and mutual funds holding non-traditional investment classes including private equity funds and alternative exchange funds.
(c)	Excludes dividends and interest receivable totaling $0.6 million and $0.3 million at December 31, 2017 and 2016, respectively.

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STOCK-BASED COMPENSATION PLANS (Tables)

12 Months Ended

Dec. 31, 2017

STOCK-BASED COMPENSATION PLANS [Abstract]

Activity in Long-Term Incentive Program

Activity in this long-term incentive program is as follows:

	Stock Options
	Outstanding			Weighted- average Exercise Price of Shares
Outstanding at December 31, 2015		1,969,301		$	28.15
Granted		330,383			38.02
Exercised		(525,298	)		25.12
Forfeited		(18,394	)		34.47
Outstanding at December 31, 2016		1,755,992			30.85
Granted		197,943			57.02
Exercised		(238,499	)		25.72
Forfeited		(7,140	)		37.47
Outstanding at December 31, 2017		1,708,296			34.57
Exercisable at December 31, 2017		1,015,823		$	29.57

Summary of Information about Stock Options Outstanding under Stock Option Plan

The following table summarizes the information about stock options outstanding under the Company’s stock option plan at December 31, 2017:

		Options outstanding						Options exercisable
Range of Exercise Price		Shares		Weighted- average Exercise Price		Weighted- average Remaining Life (years)		Shares		Weighted average Exercise Price
$	0.00 – $18.00		24,736	$	17.82		1.31		24,736	$	17.82
$	18.001 – $28.00		314,511		22.23		2.93		314,511		22.23
$	28.001 – $29.00		171,083		28.78		4.22		171,083		28.78
$	29.001 – $30.00		228,668		29.79		5.20		176,843		29.79
$	30.001 – $40.00		771,781		37.09		7.28		317,005		37.06
$	40.001 – $60.00		197,517		57.02		9.14		11,645		57.12
TOTAL			1,708,296	$	34.57		6.02		1,015,823	$	29.57

Summary of Valuation Assumptions Used to Estimate Value of Stock Options

The Black-Scholes model requires several assumptions, which management developed based on historical trends and current market observations.

	2017			2016			2015
Weighted-average Fair Value of Options Granted	$	12.78		$	7.90		$	7.48
Assumptions:
Weighted-average expected life (in years)		6.50			6.50			6.50
Future dividend yield		3.19	%		3.43	%		3.40	%
Share price volatility		29.71	%		30.00	%		30.34	%
Weighted-average risk-free interest rate		2.31	%		1.72	%		1.73	%

Activity of Unvested Restricted Stock Awards

A summary of the status of the Company’s unvested restricted stock awards as of December 31, 2017, and changes during the twelve months ended December 31, 2017 and 2016, is presented below:

	Restricted Shares			Weighted-average grant date fair value
Unvested at December 31, 2015		246,311		$	27.85
Awards		148,240			27.04
Forfeitures		(42,394	)		17.49
Vestings		(98,327	)		25.64
Unvested at December 31, 2016		253,830			29.98
Awards		46,428			57.02
Forfeitures		(4,863	)		24.78
Vestings		(64,522	)		33.69
Unvested at December 31, 2017		230,873		$	34.06

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EARNINGS PER SHARE (Tables)

12 Months Ended

Dec. 31, 2017

EARNINGS PER SHARE [Abstract]

Reconciliation of Basic to Diluted Earnings per Share

The following is a reconciliation of basic to diluted earnings per share for the years ended December 31, 2017, 2016 and 2015.

(000's omitted, except per share data)	2017			2016			2015
Net income	$	150,717		$	103,812		$	91,230
Income attributable to unvested stock-based compensation awards		(597	)		(550	)		(453	)
Income available to common shareholders	$	150,120		$	103,262		$	90,777
Weighted-average common shares outstanding - basic		48,843			44,091			40,996
Basic earnings per share	$	3.07		$	2.34		$	2.21
Net income	$	150,717		$	103,812		$	91,230
Income attributable to unvested stock-based compensation awards		(597	)		(550	)		(453	)
Income available to common shareholders	$	150,120		$	103,262		$	90,777
Weighted-average common shares outstanding		48,843			44,091			40,996
Assumed exercise of stock options		627			394			405
Weighted-average common shares outstanding – diluted		49,470			44,485			41,401
Diluted earnings per share	$	3.03		$	2.32		$	2.19
Cash dividends declared per share	$	1.32		$	1.26		$	1.22

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COMMITMENTS, CONTINGENT LIABILITIES AND RESTRICTIONS (Tables)

12 Months Ended

Dec. 31, 2017

COMMITMENTS, CONTINGENT LIABILITIES AND RESTRICTIONS [Abstract]

Off Balance Sheet Financial Instruments Contract Amounts

The contract amounts of commitments and contingencies are as follows at December 31:

(000's omitted)	2017		2016
Commitments to extend credit	$	1,080,004	$	773,442
Standby letters of credit		23,782		22,656
Total	$	1,103,786	$	796,098

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LEASES (Tables)

12 Months Ended

Dec. 31, 2017

LEASES [Abstract]

Future Minimum Rental Commitments

The future minimum rental commitments as of December 31, 2017 for all non-cancelable operating leases are as follows:

2018	$	9,189
2019		8,194
2020		6,603
2021		5,164
2022		4,101
Thereafter		8,623
Total	$	41,874

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REGULATORY MATTERS (Tables)

12 Months Ended

Dec. 31, 2017

REGULATORY MATTERS [Abstract]

Capital Ratios and Amounts

As of December 31, 2017, the OCC categorized the Company and Bank as “well capitalized” under the regulatory framework for prompt corrective action.

	Actual					For capital adequacy purposes					For capital adequacy purposes plus Capital Conservation Buffer					To be well-capitalized under prompt corrective action
(000’s omitted)	Amount		Ratio			Amount		Ratio			Amount		Ratio			Amount		Ratio
Community Bank System, Inc.:
2017
Tier 1 Leverage ratio	$	995,860		10.00	%	$	398,183		4.00	%						$	497,729		5.00	%
Tier 1 risk-based capital		995,860		16.64	%		358,988		6.00	%	$	433,777		7.25	%		478,651		8.00	%
Total risk-based capital		1,043,910		17.45	%		478,651		8.00	%		553,440		9.25	%		598,314		10.00	%
Common equity tier 1 capital		876,685		14.65	%		269,241		4.50	%		344,030		5.75	%		388,904		6.50	%

2016
Tier 1 Leverage ratio	$	858,347	10.55	%	$	325,438	4.00	%					$	406,798	5.00	%
Tier 1 risk-based capital		858,347	18.10	%		284,583	6.00	%	$	314,228	6.625	%		379,445	8.00	%
Total risk-based capital		905,996	19.10	%		379,445	8.00	%		409,089	8.625	%		474,306	10.00	%
Common equity tier 1 capital		759,199	16.01	%		213,438	4.50	%		243,082	5.125	%		308,299	6.50	%

Community Bank, N.A.:
2017
Tier 1 Leverage ratio	$	859,538	8.71	%	$	394,981	4.00	%					$	493,726	5.00	%
Tier 1 risk-based capital		859,538	14.50	%		355,641	6.00	%	$	429,733	7.25	%		474,188	8.00	%
Total risk-based capital		907,588	15.31	%		474,188	8.00	%		548,280	9.25	%		592,736	10.00	%
Common equity tier 1 capital		859,483	14.50	%		266,731	4.50	%		340,823	5.75	%		385,278	6.50	%

2016
Tier 1 Leverage ratio	$	672,633	8.30	%	$	324,080	4.00	%					$	405,099	5.00	%
Tier 1 risk-based capital		672,633	14.28	%		282,662	6.00	%	$	312,106	6.625	%		376,883	8.00	%
Total risk-based capital		720,282	15.29	%		376,883	8.00	%		406,327	8.625	%		471,104	10.00	%
Common equity tier 1 capital		672,578	14.28	%		211,997	4.50	%		241,441	5.125	%		306,217	6.50	%

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PARENT COMPANY STATEMENTS (Tables)

12 Months Ended

Dec. 31, 2017

PARENT COMPANY STATEMENTS [Abstract]

Condensed Statements of Condition of Parent Company

The condensed statements of condition of the parent company at December 31 are as follows:

(000's omitted)	2017		2016
Assets:
Cash and cash equivalents	$	84,460	$	151,127
Investment securities		4,322		3,628
Investment in and advances to:
Bank subsidiary		1,511,780		1,116,554
Non-bank subsidiaries		169,341		35,566
Other assets		9,150		10,345
Total assets	$	1,779,053	$	1,317,220
Liabilities and shareholders' equity:
Accrued interest and other liabilities	$	20,924	$	16,950
Borrowings		122,814		102,170
Shareholders' equity		1,635,315		1,198,100
Total liabilities and shareholders' equity	$	1,779,053	$	1,317,220

Condensed Statements of Income of Parent Company

The condensed statements of income of the parent company for the years ended December 31 is as follows:

(000's omitted)	2017			2016			2015
Revenues:
Dividends from subsidiaries:
Bank subsidiary	$	91,000		$	89,000		$	70,000
Non-bank subsidiaries		35,500			1,750			6,000
Interest and dividends on investments		133			102			94
Total revenues		126,633			90,852			76,094
Expenses:
Interest on borrowings		3,904			2,949			2,537
Acquisition expenses		91			429			0
Other expenses		26			11			19
Total expenses		4,021			3,389			2,556
Income before tax benefit and equity in undistributed net income of subsidiaries		122,612			87,463			73,538
Income tax benefit/(expense)		1,930			866			(572	)
Income before equity in undistributed net income of subsidiaries		124,542			88,329			72,966
Equity in undistributed net income of subsidiaries		26,175			15,483			18,264
Net income	$	150,717		$	103,812		$	91,230
Other comprehensive (loss), net of tax:
Changes in other comprehensive income/(loss) related to pension and other post retirement obligations		168			3,322			(4,567	)
Changes in other comprehensive loss related to unrealized losses on available-for-sale securities		(11,065	)		(14,714	)		(6,918	)
Other comprehensive loss		(10,897	)		(11,392	)		(11,485	)
Comprehensive income	$	139,820		$	92,420		$	79,745

Statements of Cash Flows of Parent Company

The statements of cash flows of the parent company for the years ended December 31 is as follows:

(000's omitted)	2017			2016			2015
Operating activities:
Net income	$	150,717		$	103,812		$	91,230
Adjustments to reconcile net income to net cash provided by operating activities
Equity in undistributed net income of subsidiaries		(26,175	)		(15,483	)		(18,264	)
Net change in other assets and other liabilities		1,870			(215	)		(27	)
Net cash provided by operating activities		126,412			88,114			72,939
Investing activities:
Proceeds from sale of investment securities		0			0			0
Cash (paid)/received for acquisitions, net of cash acquired of $150,534, $0, and $81,772, respectively		(139,471	)		0			25,505
Capital contributions to subsidiaries		(11,063	)		0			(80,231	)
Net cash used in investing activities		(150,534	)		0			(54,726	)
Financing activities:
Issuance of common stock		9,700			15,326			13,975
Purchase of treasury stock		(3,306	)		(3,470	)		(9,126	)
Sale of treasury stock		10,060			8,888			16,571
Increase in deferred compensation arrangements		3,306			0			0
Cash dividends paid		(62,305	)		(55,048	)		(49,273	)
Net cash used in financing activities		(42,545	)		(34,304	)		(27,853	)
Change in cash and cash equivalents		(66,667	)		53,810			(9,640	)
Cash and cash equivalents at beginning of year		151,127			97,317			106,957
Cash and cash equivalents at end of year	$	84,460		$	151,127		$	97,317
Supplemental disclosures of cash flow information:
Cash paid for interest	$	3,826		$	2,909		$	2,523
Supplemental disclosures of noncash financing activities
Dividends declared and unpaid	$	17,460		$	14,268		$	13,605
Capital contributions to subsidiaries		513,769			0			76,461
Common stock issued for acquisition		343,132			0			102,202

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FAIR VALUE (Tables)

12 Months Ended

Dec. 31, 2017

FAIR VALUE [Abstract]

Summary of Fair Value Measured on a Recurring Basis

The following tables set forth the Company’s financial assets and liabilities that were accounted for at fair value on a recurring basis.  There were no transfers between any of the levels for the periods presented.

	December 31, 2017
(000's omitted)	Level 1		Level 2			Level 3		Total Fair Value
Available-for-sale investment securities:
U.S. Treasury and agency securities	$	1,909,290	$	144,781		$	0	$	2,054,071
Obligations of state and political subdivisions		0		528,956			0		528,956
Government agency mortgage-backed securities		0		357,538			0		357,538
Corporate debt securities		0		2,623			0		2,623
Government agency collateralized mortgage obligations		0		87,374			0		87,374
Marketable equity securities		526		0			0		526
Total available-for-sale investment securities		1,909,816		1,121,272			0		3,031,088
Mortgage loans held for sale		0		461			0		461
Commitments to originate real estate loans for sale		0		0			89		89
Forward sales commitments		0		4			0		4
Interest rate swap agreements asset		0		1,064			0		1,064
Interest rate swap agreements liability		0		(904	)		0		(904	)
Total	$	1,909,816	$	1,121,897		$	89	$	3,031,802

	December 31, 2016
(000's omitted)	Level 1		Level 2		Level 3		Total Fair Value
Available-for-sale investment securities:
U.S. Treasury and agency securities	$	1,902,762	$	0	$	0	$	1,902,762
Obligations of state and political subdivisions		0		594,990		0		594,990
Government agency mortgage-backed securities		0		235,230		0		235,230
Corporate debt securities		0		5,687		0		5,687
Government agency collateralized mortgage obligations		0		9,535		0		9,535
Marketable equity securities		452		0		0		452
Total available-for-sale investment securities		1,903,214		845,442		0		2,748,656
Mortgage loans held for sale		0		2,416		0		2,416
Commitments to originate real estate loans for sale		0		0		54		54
Forward sales commitments		0		3		0		3
Total	$	1,903,214	$	847,861	$	54	$	2,751,129

Assets and Liabilities Measured on a Non-Recurring Basis

Assets and liabilities measured on a non-recurring basis:

	December 31, 2017								December 31, 2016
(000's omitted)	Level 1		Level 2		Level 3		Total Fair Value		Level 1		Level 2		Level 3		Total Fair Value
Impaired loans	$	0	$	0	$	0	$	0	$	0	$	0	$	633	$	633
Other real estate owned		0		0		1,915		1,915		0		0		1,966		1,966
Total	$	0	$	0	$	1,915	$	1,915	$	0	$	0	$	2,599	$	2,599

Significant Unobservable Inputs, Fair Value Valuation Techniques

The significant unobservable inputs used in the determination of fair value of assets classified as Level 3 on a recurring or non-recurring basis as of December 31, 2017 are as follows:

(000's omitted)	Fair Value		Valuation Technique	Significant Unobservable Inputs	Significant Unobservable Input Range (Weighted Average)
Other real estate owned	$	1,915	Fair value of collateral	Estimated cost of disposal/market adjustment		9.0% - 99.0% (38.5	%)
Commitments to originate real estate loans for sale		89	Discounted cash flow	Embedded servicing value		1	%

The significant unobservable inputs used in the determination of fair value of assets classified as Level 3 on a recurring or non-recurring basis as of December 31, 2016 are as follows:

(000's omitted)	Fair Value		Valuation Technique	Significant Unobservable Inputs	Significant Unobservable Input Range (Weighted Average)
Other real estate owned	$	1,966	Fair value of collateral	Estimated cost of disposal/market adjustment		9.0% - 97.0% (29.6	%)
Impaired loans		633	Fair value of collateral	Estimated cost of disposal/market adjustment		15.0% - 50.0% (36.5	%)
Commitments to originate real estate loans for sale		54	Discounted cash flow	Embedded servicing value		1	%

Carrying Amounts and Estimated Fair Values of Other Financial Instruments

The carrying amounts and estimated fair values of the Company’s other financial instruments that are not accounted for at fair value at December 31, 2017 and 2016 are as follows:

	December 31, 2017				December 31, 2016
(000's omitted)	Carrying Value		Fair Value		Carrying Value		Fair Value
Financial assets:
Net loans	$	6,209,174	$	6,244,941	$	4,901,329		4,935,140
Financial liabilities:
Deposits		8,444,420		8,431,481		7,075,954		7,071,191
Short-term borrowings		24,000		24,000		146,200		146,200
Securities sold under agreement to repurchase, short-term		337,011		337,011		0		0
Other long-term debt		2,071		2,021		0		0
Subordinated debt held by unconsolidated subsidiary trusts		122,814		122,814		102,170		90,144

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VARIABLE INTEREST ENTITIES (Tables)

12 Months Ended

Dec. 31, 2017

VARIABLE INTEREST ENTITIES [Abstract]

Carrying Amount and Classification of Assets and Liabilities of 706 North Clinton

The carrying amount of the assets and liabilities of 706 North Clinton and the classification of these assets and liabilities in the Company’s consolidated statements of condition at December 31 is as follows:

(000's omitted)	2017		2016
Cash and cash equivalents	$	74	$	30
Premises and equipment, net		6,266		6,429
Other assets		5		0
Total assets	$	6,345	$	6,459
Accrued interest and other liabilities / Total liabilities	$	0	$	1

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SEGMENT INFORMATION (Tables)

12 Months Ended

Dec. 31, 2017

SEGMENT INFORMATION [Abstract]

Schedule of Segment Reporting Information by Segment

Information about reportable segments and reconciliation of the information to the consolidated financial statements follows:

(000's omitted)	Banking		Employee Benefit Services		All Other		Eliminations			Consolidated Total
2017
Net interest income	$	315,025	$	396	$	254	$	0		$	315,675
Provision for loan losses		10,984		0		0		0			10,984
Noninterest income		73,337		82,743		49,201		(2,858	)		202,423
Amortization of intangible assets		5,296		8,578		3,067		0			16,941
Acquisition expenses		24,549		1,194		243		0			25,986
Other operating expenses		218,608		51,138		37,334		(2,858	)		304,222
Income before income taxes	$	128,925	$	22,229	$	8,811	$	0		$	159,965
Assets	$	10,505,919	$	203,369	$	66,548	$	(29,638	)	$	10,746,198
Goodwill	$	629,916	$	84,449	$	20,065	$	0		$	734,430
2016
Net interest income	$	273,542	$	162	$	192	$	0		$	273,896
Provision for loan losses		8,076		0		0		0			8,076
Noninterest income		66,059		48,261		43,747		(2,442	)		155,625
Amortization of intangible assets		2,682		420		2,377		0			5,479
Acquisition expenses		1,005		445		256		0			1,706
Other operating expenses		190,263		36,892		34,950		(2,442	)		259,663
Income before income taxes	$	137,575	$	10,666	$	6,356	$	0		$	154,597
Assets	$	8,598,057	$	38,742	$	71,428	$	(41,790	)	$	8,666,437
Goodwill	$	440,870	$	8,019	$	16,253	$	0		$	465,142
2015
Net interest income	$	248,167	$	132	$	121	$	0		$	248,420
Provision for loan losses		6,447		0		0		0			6,447
Noninterest income		57,704		46,784		20,967		(2,156	)		123,299
Amortization of intangible assets		2,803		515		345		0			3,663
Acquisition expenses		6,947		21		69		0			7,037
Other operating expenses		174,918		35,197		14,396		(2,156	)		222,355
Income before income taxes	$	114,756	$	11,183	$	6,278	$	0		$	132,217
Assets	$	8,513,228	$	35,011	$	70,067	$	(65,637	)	$	8,552,669
Goodwill	$	439,052	$	8,019	$	16,181	$	0		$	463,252

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017 USD ($) Subsidiary Trust Branch County Component Calculation Segment Factor Type $ / shares	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Subsidiary, Sale of Stock [Line Items]
Number of significant consolidated subsidiaries owned | Subsidiary		2
Number of unconsolidated subsidiary business trusts owned | Trust		3
Number of bank branches | Branch		225
Risks and Uncertainties [Abstract]
Number of main components of economic risk | Component		3
Financing Receivable, Recorded Investment, Past Due [Line Items]
Period for which a nonaccrual TDR loan remains on nonaccrual status		12 months
Number of days past due for loans to be placed on nonaccrual status		90 days
Allowance for Loan Losses [Abstract]
Number of broad components used in allowance methodology | Component		2
Number of calculations used for general loan loss allocations | Calculation		2
Number of main loan segments | Segment		5
Period of historical net charge-off data for each loan class used in determining allowance level		36 months
Number of qualitative environmental factors used in qualitative calculation for general loan loss allocations | Factor		8
Other Real Estate [Abstract]
Other real estate		$ 1,900	$ 2,000
Derivative Financial Instruments and Hedging Activities [Abstract]
Number of types of derivative financial instruments | Type		3
Advertising [Abstract]
Advertising costs		$ 5,700	$ 3,900	$ 3,600
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Corporate income tax rate		35.00%	35.00%	35.00%
Reclassification related to tax effect of Tax Cuts and Jobs Act		$ 0
Minimum [Member]
Investments in Real Estate Limited Partnerships [Abstract]
Company's ownership interest in limited partnerships		5.00%
Maximum [Member]
Investments in Real Estate Limited Partnerships [Abstract]
Company's ownership interest in limited partnerships		99.99%
Retained Earnings [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification related to tax effect of Tax Cuts and Jobs Act		$ 645
Accumulated Other Comprehensive Income/(Loss) [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification related to tax effect of Tax Cuts and Jobs Act		(645)
ASU 2014-01 [Member]
Investments in Real Estate Limited Partnerships [Abstract]
Unfunded commitments		3,200
Impairment losses related to real estate partnerships		0
ASU 2016-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Effect of change on net income from excess tax benefits		$ 3,100
Effect of change on net income from excess tax benefits per diluted common share (in dollars per share) | $ / shares		$ 0.06
ASU 2018-02 [Member] | Retained Earnings [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification related to tax effect of Tax Cuts and Jobs Act		$ 645
ASU 2018-02 [Member] | Accumulated Other Comprehensive Income/(Loss) [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification related to tax effect of Tax Cuts and Jobs Act		$ (645)
Plan [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Corporate income tax rate	21.00%
Plan [Member] | ASU 2018-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Corporate income tax rate	21.00%
Upstate New York [Member]
Subsidiary, Sale of Stock [Line Items]
Number of counties where the bank has facilities | County		35
Northeastern Pennsylvania [Member]
Subsidiary, Sale of Stock [Line Items]
Number of counties where the bank has facilities | County		6
Vermont [Member]
Subsidiary, Sale of Stock [Line Items]
Number of counties where the bank has facilities | County		12
Western Massachusetts [Member]
Subsidiary, Sale of Stock [Line Items]
Number of counties where the bank has facilities | County		1
Consumer Installment Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Number of days past due after which loans are charged off to the extent outstanding principal balance exceeds fair value of collateral/property		90 days
Consumer Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Number of days past due after which loans are charged off to the extent outstanding principal balance exceeds fair value of collateral/property		180 days
Home Equity Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Number of days past due after which loans are charged off to the extent outstanding principal balance exceeds fair value of collateral/property		180 days
Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life		3 years
Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life		10 years
Software [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life		3 years
Software [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life		7 years
Hardware [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life		3 years
Hardware [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life		7 years
Building and Building Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life		10 years
Building and Building Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life		40 years
Land Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life		20 years
BPAS [Member]
Subsidiary, Sale of Stock [Line Items]
Number of significant consolidated subsidiaries owned | Subsidiary		5
Hand Benefits & Trust [Member]
Subsidiary, Sale of Stock [Line Items]
Number of significant consolidated subsidiaries owned | Subsidiary		1
NRS [Member]
Subsidiary, Sale of Stock [Line Items]
Number of significant consolidated subsidiaries owned | Subsidiary		1
Core Deposits [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible asset useful life (amortization period)		7 years
Core Deposits [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible asset useful life (amortization period)		20 years
Customer Relationships [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible asset useful life (amortization period)		7 years
Customer Relationships [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible asset useful life (amortization period)		20 years
Commercial Portfolio Segment [Member] | Minimum [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Threshold balance of loans individually evaluated for impairment		$ 500

XML

ACQUISITIONS (Details) shares in Thousands, $ in Thousands									3 Months Ended			12 Months Ended
		Dec. 04, 2017 USD ($) shares	Nov. 17, 2017 USD ($)	May 12, 2017 USD ($) Branch shares	Mar. 01, 2017 USD ($)	Feb. 03, 2017 USD ($)	Jan. 02, 2017 USD ($)	Dec. 04, 2015 USD ($) Branch shares	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Business Acquisition [Line Items]
Cash												$ 107,414	$ 575	$ (25,505)
Goodwill									$ 734,430			734,430	$ 465,142	$ 463,252
Increase (decrease) in other assets as a result of reclassification and adjustment									(300)	$ 5,500	$ (2,700)
Increase (decrease) in other liabilities as a result of reclassification and adjustment									(20)	6,600	(2,400)
Increase in investments as a result of updated information not available at the time of acquisition										200
Decrease in loans as a result of an adjustment to the valuation of acquired impaired loans									(500)	(600)
Increase in premises and equipment as a result of updated appraisal information not available at the time of acquisition										3,600
Gordon B. Roberts Agency, Inc [Member]
Business Acquisition [Line Items]
Cash		$ 1,350
Purchase price of acquisition		$ 3,700
Issuance of common shares (in shares) | shares		40
Assets acquired		$ 600
Other liabilities		700
Goodwill		2,200
Gordon B. Roberts Agency, Inc [Member] | Other Intangibles [Member]
Business Acquisition [Line Items]
Intangibles		$ 1,600
Northeast Capital Management, Inc [Member]
Business Acquisition [Line Items]
Cash			$ 1,200
Contingent payment			200
Northeast Capital Management, Inc [Member] | Other Intangibles [Member]
Business Acquisition [Line Items]
Intangibles			$ 1,200
Dryfoos [Member]
Business Acquisition [Line Items]
Cash					$ 3,000
Goodwill					1,700
Dryfoos [Member] | Other Intangibles [Member]
Business Acquisition [Line Items]
Intangibles					$ 1,700
BAS [Member]
Business Acquisition [Line Items]
Cash							$ 1,200
BAS [Member] | Other Intangibles [Member]
Business Acquisition [Line Items]
Intangibles							$ 1,200
Merchants Bancshares, Inc. [Member]
Business Acquisition [Line Items]
Cash	[1]			$ 82,898
Purchase price of acquisition				$ 345,152
Issuance of common shares (in shares) | shares				4,680
Assets acquired				$ 2,000,000
Other liabilities				11,750
Goodwill				189,046
Revenue earned												42,600
Expenses incurred												$ 19,900
Increase (decrease) in goodwill as a result of fair value adjustment									$ 800	(2,000)
Merchants Bancshares, Inc. [Member] | Other Intangibles [Member]
Business Acquisition [Line Items]
Intangibles				$ 2,857
Merchants Bancshares, Inc. [Member] | Vermont [Member]
Business Acquisition [Line Items]
Number of branch locations added upon merger | Branch				31
Merchants Bancshares, Inc. [Member] | Massachusetts [Member]
Business Acquisition [Line Items]
Number of branch locations added upon merger | Branch				1
Oneida Financial Corp [Member]
Business Acquisition [Line Items]
Cash	[1]							$ 56,266
Purchase price of acquisition								$ 158,468
Issuance of common shares (in shares) | shares								2,380
Number of new branch locations included in acquisition or purchase agreement | Branch								12
Assets acquired								$ 769,400
Other liabilities								1,333
Goodwill								89,681
Oneida Financial Corp [Member] | Other Intangibles [Member]
Business Acquisition [Line Items]
Intangibles								$ 9,994
Northeast Retirement Services, Inc. [Member]
Business Acquisition [Line Items]
Cash	[1]					$ 70,073
Purchase price of acquisition						148,556
Tangible assets, net						$ 36,100
Factor of straight-line rate of depreciation used in declining balance depreciation method						150.00%
Period of amortization												10 years
Deferred tax liability						$ 24,200
Other liabilities						28,002
Goodwill						76,430
Revenue earned												$ 31,500
Expenses incurred												$ 21,500
Increase (decrease) in goodwill as a result of fair value adjustment										$ (100)	$ 300
Northeast Retirement Services, Inc. [Member] | Other Intangibles [Member]
Business Acquisition [Line Items]
Intangibles						$ 60,200

[1] Includes NECM $0.2 million contingent cash payment consideration.

XML

ACQUISITIONS, Estimated Fair Value of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands						12 Months Ended
		May 12, 2017	Feb. 03, 2017	Jan. 04, 2016	Dec. 04, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Consideration paid [Abstract]
Cash						$ 107,414	$ 575	$ (25,505)
Recognized amounts of identifiable assets acquired and liabilities assumed [Abstract]
Goodwill						734,430	$ 465,142	$ 463,252
NRS [Member]
Consideration paid [Abstract]
Cash	[1]		$ 70,073
Community Bank System, Inc. common stock			78,483
Total net consideration paid			148,556
Recognized amounts of identifiable assets acquired and liabilities assumed [Abstract]
Cash and cash equivalents			11,063
Investment securities			20,294
Loans			0
Premises and equipment			411
Accrued interest receivable			72
Other assets			8,088
Deposits			0
Other liabilities			(28,002)
Short-term advances			0
Securities sold under agreement to repurchase, short-term			0
Long-term debt			0
Subordinated debt held by unconsolidated subsidiary trusts			0
Total identifiable assets, net			72,126
Goodwill			76,430
NRS [Member] | Core Deposits [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed [Abstract]
Intangibles			0
NRS [Member] | Other Intangibles [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed [Abstract]
Intangibles			$ 60,200
Merchants Bancshares, Inc. [Member]
Consideration paid [Abstract]
Cash	[1]	$ 82,898
Community Bank System, Inc. common stock		262,254
Total net consideration paid		345,152
Recognized amounts of identifiable assets acquired and liabilities assumed [Abstract]
Cash and cash equivalents		40,730
Investment securities		370,648
Loans		1,488,157
Premises and equipment		16,608
Accrued interest receivable		4,773
Other assets		51,585
Deposits		(1,448,406)
Other liabilities		(11,750)
Short-term advances		(80,000)
Securities sold under agreement to repurchase, short-term		(278,076)
Long-term debt		(3,615)
Subordinated debt held by unconsolidated subsidiary trusts		(20,619)
Total identifiable assets, net		156,106
Goodwill		189,046
Merchants Bancshares, Inc. [Member] | Core Deposits [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed [Abstract]
Intangibles		23,214
Merchants Bancshares, Inc. [Member] | Other Intangibles [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed [Abstract]
Intangibles		$ 2,857
WJL Agencies Inc [Member]
Consideration paid [Abstract]
Cash	[1]			$ 575
Community Bank System, Inc. common stock				0
Total net consideration paid				575
Recognized amounts of identifiable assets acquired and liabilities assumed [Abstract]
Cash and cash equivalents				0
Investment securities				0
Loans				0
Premises and equipment				0
Accrued interest receivable				0
Other assets				0
Deposits				0
Other liabilities				0
Short-term advances				0
Securities sold under agreement to repurchase, short-term				0
Long-term debt				0
Subordinated debt held by unconsolidated subsidiary trusts				0
Total identifiable assets, net				288
Goodwill				287
WJL Agencies Inc [Member] | Core Deposits [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed [Abstract]
Intangibles				0
WJL Agencies Inc [Member] | Other Intangibles [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed [Abstract]
Intangibles				$ 288
Other [Member]
Consideration paid [Abstract]
Cash	[1],[2]					6,775
Community Bank System, Inc. common stock	[2]					2,395
Total net consideration paid	[2]					9,170
Recognized amounts of identifiable assets acquired and liabilities assumed [Abstract]
Cash and cash equivalents	[2]					339
Investment securities	[2]					0
Loans	[2]					0
Premises and equipment	[2]					27
Accrued interest receivable	[2]					0
Other assets	[2]					583
Deposits	[2]					0
Other liabilities	[2]					(1,217)
Short-term advances	[2]					0
Securities sold under agreement to repurchase, short-term	[2]					0
Long-term debt	[2]					0
Subordinated debt held by unconsolidated subsidiary trusts	[2]					0
Total identifiable assets, net	[2]					5,358
Goodwill	[2]					3,812
Other [Member] | Core Deposits [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed [Abstract]
Intangibles	[2]					0
Other [Member] | Other Intangibles [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed [Abstract]
Intangibles	[2]					5,626
Total [Member]
Consideration paid [Abstract]
Cash	[1]					159,746
Community Bank System, Inc. common stock						343,132
Total net consideration paid						502,878
Recognized amounts of identifiable assets acquired and liabilities assumed [Abstract]
Cash and cash equivalents						52,132
Investment securities						390,942
Loans						1,488,157
Premises and equipment						17,046
Accrued interest receivable						4,845
Other assets						60,256
Deposits						(1,448,406)
Other liabilities						(40,969)
Short-term advances						(80,000)
Securities sold under agreement to repurchase, short-term						(278,076)
Long-term debt						(3,615)
Subordinated debt held by unconsolidated subsidiary trusts						(20,619)
Total identifiable assets, net						233,590
Goodwill						269,288
Total [Member] | Core Deposits [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed [Abstract]
Intangibles						23,214
Total [Member] | Other Intangibles [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed [Abstract]
Intangibles						$ 68,683
Oneida Financial Corp [Member]
Consideration paid [Abstract]
Cash	[1]				$ 56,266
Community Bank System, Inc. common stock					102,202
Total net consideration paid					158,468
Recognized amounts of identifiable assets acquired and liabilities assumed [Abstract]
Cash and cash equivalents					81,772
Investment securities					225,729
Loans					399,422
Premises and equipment					22,212
Accrued interest receivable					1,133
Other assets					26,529
Deposits					(699,241)
Other liabilities					(1,333)
Short-term advances					0
Securities sold under agreement to repurchase, short-term					0
Long-term debt					0
Subordinated debt held by unconsolidated subsidiary trusts					0
Total identifiable assets, net					68,787
Goodwill					89,681
Oneida Financial Corp [Member] | Core Deposits [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed [Abstract]
Intangibles					2,570
Oneida Financial Corp [Member] | Other Intangibles [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed [Abstract]
Intangibles					$ 9,994

[1] Includes NECM $0.2 million contingent cash payment consideration.

[2] Includes amounts related to the BAS, Dryfoos, NECM and GBR acquisitions.

XML

ACQUISITIONS, Summary of Loans Acquired (Details) - Merchants Bancshares, Inc. [Member] $ in Thousands	May 12, 2017 USD ($)
Summary of loans acquired [Abstract]
Contractually required principal and interest at acquisition	$ 1,888,028
Contractual cash flows not expected to be collected	(20,138)
Expected cash flows at acquisition	1,867,890
Interest component of expected cash flows	(379,733)
Fair value of acquired loans	1,488,157
Acquired Impaired Loans [Member]
Summary of loans acquired [Abstract]
Contractually required principal and interest at acquisition	15,454
Contractual cash flows not expected to be collected	(5,385)
Expected cash flows at acquisition	10,069
Interest component of expected cash flows	(793)
Fair value of acquired loans	9,276
Acquired Non Impaired Loans [Member]
Summary of loans acquired [Abstract]
Contractually required principal and interest at acquisition	1,872,574
Contractual cash flows not expected to be collected	(14,753)
Expected cash flows at acquisition	1,857,821
Interest component of expected cash flows	(378,940)
Fair value of acquired loans	$ 1,478,881

XML

ACQUISITIONS, Intangible Asset, Goodwill and Acquisition-related Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Summary of loans acquired [Abstract]
Merger and acquisition integration-related expenses	$ 25,986	$ 1,706	$ 7,037
Merchants Bancshares, Inc. [Member] | Core Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	8 years
Merchants Bancshares, Inc. [Member] | Other Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	8 years
Dryfoos [Member] | Core Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	8 years
Dryfoos [Member] | Other Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	8 years
BAS [Member] | Core Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	8 years
BAS [Member] | Other Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	8 years
WJL Agencies Inc [Member] | Core Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	8 years
WJL Agencies Inc [Member] | Other Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	8 years
Oneida Financial Corp [Member] | Core Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	8 years
Oneida Financial Corp [Member] | Other Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	8 years

XML

ACQUISITIONS, Supplemental Pro Forma Financial Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Supplemental Pro Forma Financial Information [Abstract]
Acquisitions-related expenses	$ 25,700
Total revenue, net of interest expense, pro forma	546,977	$ 536,183
Net income, pro forma	$ 176,257	$ 109,186

XML

INVESTMENT SECURITIES (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Available-for-Sale Portfolio [Abstract]
Amortized cost	$ 3,007,148	$ 2,706,863
Gross unrealized gains	33,501	47,463
Gross unrealized losses	9,561	5,670
Fair value	3,031,088	2,748,656
Available For Sale Debt Securities Amortized Cost Basis [Abstract]
Amortized cost	3,006,897
Estimated fair value	3,030,562
Other Securities [Abstract]
Amortized cost	50,291	35,736
Estimated fair value	50,291	35,736
U.S. Treasury and Agency Securities [Member]
Available For Sale Debt Securities Amortized Cost Basis [Abstract]
Amortized cost	2,043,023	1,876,358
Gross unrealized gains	15,886	28,522
Gross unrealized losses	4,838	2,118
Estimated fair value	2,054,071	1,902,762
Obligations of State and Political Subdivisions [Member]
Available For Sale Debt Securities Amortized Cost Basis [Abstract]
Amortized cost	514,949	582,655
Gross unrealized gains	14,064	13,389
Gross unrealized losses	57	1,054
Estimated fair value	528,956	594,990
Government Agency Mortgage-Backed Securities [Member]
Available For Sale Debt Securities Amortized Cost Basis [Abstract]
Amortized cost	358,180	232,657
Gross unrealized gains	3,121	5,040
Gross unrealized losses	3,763	2,467
Estimated fair value	357,538	235,230
Corporate Debt Securities [Member]
Available For Sale Debt Securities Amortized Cost Basis [Abstract]
Amortized cost	2,648	5,716
Gross unrealized gains	0	2
Gross unrealized losses	25	31
Estimated fair value	2,623	5,687
Government Agency Collateralized Mortgage Obligations [Member]
Available For Sale Debt Securities Amortized Cost Basis [Abstract]
Amortized cost	88,097	9,225
Gross unrealized gains	155	310
Gross unrealized losses	878	0
Estimated fair value	87,374	9,535
Marketable Equity Security [Member]
Available For Sale Equity Securities Amortized Cost Basis [Abstract]
Amortized cost	251	252
Gross unrealized gains	275	200
Gross unrealized losses	0	0
Estimated fair value	526	452
Federal Home Loan Bank Common Stock [Member]
Other Securities [Abstract]
Amortized cost	9,896	12,191
Estimated fair value	9,896	12,191
Federal Reserve Bank Common Stock [Member]
Other Securities [Abstract]
Amortized cost	30,690	19,781
Estimated fair value	30,690	19,781
Certificates of Deposit [Member]
Other Securities [Abstract]
Amortized cost	3,865	0
Estimated fair value	3,865	0
Other Equity Securities [Member]
Other Securities [Abstract]
Amortized cost	5,840	3,764
Estimated fair value	$ 5,840	$ 3,764

XML

INVESTMENT SECURITIES, Investment Securities in a Continuous Unrealized Loss Position (Details) $ in Thousands	Dec. 31, 2017 USD ($) Position	Dec. 31, 2016 USD ($) Position
Available-for-Sale Securities in Unrealized Loss Positions, Number of Positions [Abstract]
Less than 12 months | Position	249	268
12 months or longer | Position	56	17
Total | Position	305	285
Available-for-Sale Securities, in Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	$ 991,521	$ 637,887
12 months or longer	75,713	21,790
Total	1,067,234	659,677
Available-for-Sale Securities, in Unrealized Loss Position, Gross Unrealized Losses [Abstract]
Less than 12 months	7,231	4,840
12 months or longer	2,330	830
Total	$ 9,561	$ 5,670
U.S. Treasury and Agency Securities [Member]
Available-for-Sale Securities in Unrealized Loss Positions, Number of Positions [Abstract]
Less than 12 months | Position	44	13
12 months or longer | Position	0	0
Total | Position	44	13
Available-for-Sale Securities, in Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	$ 699,709	$ 449,242
12 months or longer	0	0
Total	699,709	449,242
Available-for-Sale Securities, in Unrealized Loss Position, Gross Unrealized Losses [Abstract]
Less than 12 months	4,838	2,118
12 months or longer	0	0
Total	$ 4,838	$ 2,118
Obligations of State and Political Subdivisions [Member]
Available-for-Sale Securities in Unrealized Loss Positions, Number of Positions [Abstract]
Less than 12 months | Position	45	197
12 months or longer | Position	0	0
Total | Position	45	197
Available-for-Sale Securities, in Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	$ 23,432	$ 102,106
12 months or longer	0	0
Total	23,432	102,106
Available-for-Sale Securities, in Unrealized Loss Position, Gross Unrealized Losses [Abstract]
Less than 12 months	57	1,054
12 months or longer	0	0
Total	$ 57	$ 1,054
Government Agency Mortgage-Backed Securities [Member]
Available-for-Sale Securities in Unrealized Loss Positions, Number of Positions [Abstract]
Less than 12 months | Position	120	57
12 months or longer | Position	55	15
Total | Position	175	72
Available-for-Sale Securities, in Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	$ 185,716	$ 83,862
12 months or longer	75,712	21,788
Total	261,428	105,650
Available-for-Sale Securities, in Unrealized Loss Position, Gross Unrealized Losses [Abstract]
Less than 12 months	1,433	1,637
12 months or longer	2,330	830
Total	$ 3,763	$ 2,467
Corporate Debt Securities [Member]
Available-for-Sale Securities in Unrealized Loss Positions, Number of Positions [Abstract]
Less than 12 months | Position	1	1
12 months or longer | Position	0	0
Total | Position	1	1
Available-for-Sale Securities, in Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	$ 2,623	$ 2,677
12 months or longer	0	0
Total	2,623	2,677
Available-for-Sale Securities, in Unrealized Loss Position, Gross Unrealized Losses [Abstract]
Less than 12 months	25	31
12 months or longer	0	0
Total	$ 25	$ 31
Government Agency Collateralized Mortgage Obligations [Member]
Available-for-Sale Securities in Unrealized Loss Positions, Number of Positions [Abstract]
Less than 12 months | Position	39	0
12 months or longer | Position	1	2
Total | Position	40	2
Available-for-Sale Securities, in Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	$ 80,041	$ 0
12 months or longer	1	2
Total	80,042	2
Available-for-Sale Securities, in Unrealized Loss Position, Gross Unrealized Losses [Abstract]
Less than 12 months	878	0
12 months or longer	0	0
Total	$ 878	$ 0

XML

INVESTMENT SECURITIES, Amortized Cost and Estimated Fair Value of Debt Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Available-for-Sale, Debt Maturities, Amortized Cost [Abstract]
Due in one year or less	$ 45,966
Due after one through five years	1,565,423
Due after five years through ten years	758,742
Due after ten years	190,489
Subtotal	2,560,620
Amortized cost	3,006,897
Available-for-Sale, Debt Maturities, Fair Value [Abstract]
Due in one year or less	46,042
Due after one through five years	1,572,634
Due after five years through ten years	769,828
Due after ten years	197,146
Subtotal	2,585,650
Fair value	3,030,562
Government Agency Mortgage-Backed Securities [Member]
Available-for-Sale, Debt Maturities, Amortized Cost [Abstract]
Without single maturity date	358,180
Amortized cost	358,180	$ 232,657
Available-for-Sale, Debt Maturities, Fair Value [Abstract]
Without single maturity date	357,538
Fair value	357,538	235,230
Government Agency Collateralized Mortgage Obligations [Member]
Available-for-Sale, Debt Maturities, Amortized Cost [Abstract]
Without single maturity date	88,097
Amortized cost	88,097	9,225
Available-for-Sale, Debt Maturities, Fair Value [Abstract]
Without single maturity date	87,374
Fair value	87,374	9,535
U.S. Treasury Securities [Member]
Available-for-Sale, Debt Maturities, Amortized Cost [Abstract]
Amortized cost	2,043,023	1,876,358
Available-for-Sale, Debt Maturities, Fair Value [Abstract]
Fair value	$ 2,054,071	$ 1,902,762

XML

INVESTMENT SECURITIES, Investment Securities Pledged as Collateral (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Investment securities pledged to collateralize certain deposits and borrowings	$ 1,530.0	$ 1,865.0
U.S. Treasury Securities [Member] | Securities Sold under Agreements to Repurchase [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities pledged to collateralize certain deposits and borrowings	$ 473.2

XML

LOANS, Loan Summary (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Loans receivable, net [Abstract]
Gross loans, including deferred origination costs	$ 6,256,757	$ 4,948,562
Allowance for loan losses	(47,583)	(47,233)	$ (45,401)	$ (45,341)
Net loans	6,209,174	4,901,329
Net deferred loan origination costs	25,300	22,800
Loans receivable, related parties [Roll Forward]
Balance at beginning of year	10,950	11,337
New loans	16,617	4,959
Payments	(5,223)	(5,346)
Balance at end of year	$ 22,344	10,950
Consumer Mortgage [Member] | Minimum [Member]
Loans receivable, net [Abstract]
Typical contract term	10 years
Consumer Mortgage [Member] | Maximum [Member]
Loans receivable, net [Abstract]
Typical contract term	30 years
Business Lending [Member]
Loans receivable, net [Abstract]
Gross loans, including deferred origination costs	$ 2,424,223	1,490,076
Home Equity [Member] | Maximum [Member]
Loans receivable, net [Abstract]
Typical contract term	30 years
Residential Portfolio Segment [Member] | Consumer Mortgage [Member]
Loans receivable, net [Abstract]
Gross loans, including deferred origination costs	$ 2,220,298	1,819,701
Allowance for loan losses	(10,465)	(10,094)	(10,198)	(10,286)
Commercial Portfolio Segment [Member] | Business Lending [Member]
Loans receivable, net [Abstract]
Gross loans, including deferred origination costs	2,424,223	1,490,076
Allowance for loan losses	(17,257)	(17,220)	(15,749)	(15,787)
Consumer Portfolio Segment [Member] | Consumer Indirect [Member]
Loans receivable, net [Abstract]
Gross loans, including deferred origination costs	1,011,978	1,044,972
Allowance for loan losses	(13,468)	(13,782)	(12,422)	(11,544)
Consumer Portfolio Segment [Member] | Consumer Direct [Member]
Loans receivable, net [Abstract]
Gross loans, including deferred origination costs	179,929	191,815
Allowance for loan losses	(3,039)	(2,979)	(2,997)	(3,083)
Consumer Portfolio Segment [Member] | Home Equity [Member]
Loans receivable, net [Abstract]
Gross loans, including deferred origination costs	420,329	401,998
Allowance for loan losses	$ (2,107)	$ (2,399)	$ (2,666)	$ (2,701)

XML

LOANS, Acquired Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Credit impaired acquired loans [Abstract]
Outstanding principal balance	$ 13,242	$ 6,354
Carrying amount	10,115	5,553
Credit impaired acquired loans, total balance due	13,400	6,600
Non-impaired acquired loans [Abstract]
Outstanding principal balance	1,658,780	497,308
Carrying amount	1,626,979	489,807
Total acquired loans [Abstract]
Outstanding principal balance	1,672,022	503,662
Carrying amount	1,637,094	495,360
Accretable discount related to acquired loans [Roll forward]
Balance at beginning of year	498	810
Merchants acquisition	793	0
Accretion recognized	(905)	(455)
Net reclassification to accretable from nonaccretable	590	143
Balance at end of year	$ 976	$ 498

XML

LOANS, Credit Quality By Past Due Status (Details) - USD ($) $ in Thousands		Dec. 31, 2017	Dec. 31, 2016
Aged analysis of the company's loans [Abstract]
Total loans		$ 6,256,757	$ 4,948,562
Legacy Loan [Member]
Aged analysis of the company's loans [Abstract]
90 + days past due and still accruing		2,508	1,963
Nonaccrual		16,020	16,600
Total past due		51,563	50,545
Current		4,568,100	4,402,657
Total loans		4,619,663	4,453,202
Legacy Loan [Member] | Past Due 30 - 89 Days [Member]
Aged analysis of the company's loans [Abstract]
Total past due		33,035	31,982
Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
90 + days past due and still accruing		204	1,113
Nonaccrual		8,720	4,019
Total past due		17,167	8,439
Acquired impaired	[1]	10,115	5,553
Current		1,609,812	481,368
Total loans		1,637,094	495,360
Acquired Loans [Member] | Past Due 30 - 89 Days [Member]
Aged analysis of the company's loans [Abstract]
Total past due		8,243	3,307
Consumer Mortgage [Member] | Legacy Loan [Member]
Aged analysis of the company's loans [Abstract]
Total loans		1,754,609	1,659,760
Consumer Mortgage [Member] | Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
Total loans		465,689	159,941
Business Lending [Member]
Aged analysis of the company's loans [Abstract]
Total loans		2,424,223	1,490,076
Business Lending [Member] | Legacy Loan [Member]
Aged analysis of the company's loans [Abstract]
Total loans		1,376,599	1,277,666
Business Lending [Member] | Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
Total loans		1,047,624	212,410
Consumer Indirect [Member] | Legacy Loan [Member]
Aged analysis of the company's loans [Abstract]
Total loans		991,836	1,014,825
Consumer Indirect [Member] | Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
Total loans		20,142	30,147
Consumer Direct [Member] | Legacy Loan [Member]
Aged analysis of the company's loans [Abstract]
Total loans		174,479	181,922
Consumer Direct [Member] | Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
Total loans		5,450	9,893
Home Equity [Member] | Legacy Loan [Member]
Aged analysis of the company's loans [Abstract]
Total loans		322,140	319,029
Home Equity [Member] | Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
Total loans		98,189	82,969
Residential Portfolio Segment [Member] | Consumer Mortgage [Member]
Aged analysis of the company's loans [Abstract]
Total loans		2,220,298	1,819,701
Residential Portfolio Segment [Member] | Consumer Mortgage [Member] | Legacy Loan [Member]
Aged analysis of the company's loans [Abstract]
90 + days past due and still accruing		1,500	1,180
Nonaccrual		10,722	11,352
Total past due		25,786	23,911
Current		1,728,823	1,635,849
Total loans		1,754,609	1,659,760
Residential Portfolio Segment [Member] | Consumer Mortgage [Member] | Legacy Loan [Member] | Past Due 30 - 89 Days [Member]
Aged analysis of the company's loans [Abstract]
Total past due		13,564	11,379
Residential Portfolio Segment [Member] | Consumer Mortgage [Member] | Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
90 + days past due and still accruing		26	205
Nonaccrual		3,066	2,332
Total past due		5,695	4,076
Acquired impaired	[1]	0	0
Current		459,994	155,865
Total loans		465,689	159,941
Residential Portfolio Segment [Member] | Consumer Mortgage [Member] | Acquired Loans [Member] | Past Due 30 - 89 Days [Member]
Aged analysis of the company's loans [Abstract]
Total past due		2,603	1,539
Commercial Portfolio Segment [Member] | Business Lending [Member]
Aged analysis of the company's loans [Abstract]
Total loans		2,424,223	1,490,076
Commercial Portfolio Segment [Member] | Business Lending [Member] | Legacy Loan [Member]
Aged analysis of the company's loans [Abstract]
90 + days past due and still accruing		571	145
Nonaccrual		3,944	3,811
Total past due		6,798	7,877
Current		1,369,801	1,269,789
Total loans		1,376,599	1,277,666
Commercial Portfolio Segment [Member] | Business Lending [Member] | Legacy Loan [Member] | Past Due 30 - 89 Days [Member]
Aged analysis of the company's loans [Abstract]
Total past due		2,283	3,921
Commercial Portfolio Segment [Member] | Business Lending [Member] | Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
90 + days past due and still accruing		0	0
Nonaccrual		4,328	1,252
Total past due		8,989	1,780
Acquired impaired	[1]	10,115	5,553
Current		1,028,520	205,077
Total loans		1,047,624	212,410
Commercial Portfolio Segment [Member] | Business Lending [Member] | Acquired Loans [Member] | Past Due 30 - 89 Days [Member]
Aged analysis of the company's loans [Abstract]
Total past due		4,661	528
Consumer Portfolio Segment [Member] | Consumer Indirect [Member]
Aged analysis of the company's loans [Abstract]
Total loans		1,011,978	1,044,972
Consumer Portfolio Segment [Member] | Consumer Indirect [Member] | Legacy Loan [Member]
Aged analysis of the company's loans [Abstract]
90 + days past due and still accruing		295	166
Nonaccrual		0	0
Total past due		14,492	14,049
Current		977,344	1,000,776
Total loans		991,836	1,014,825
Consumer Portfolio Segment [Member] | Consumer Indirect [Member] | Legacy Loan [Member] | Past Due 30 - 89 Days [Member]
Aged analysis of the company's loans [Abstract]
Total past due		14,197	13,883
Consumer Portfolio Segment [Member] | Consumer Indirect [Member] | Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
90 + days past due and still accruing		8	3
Nonaccrual		0	0
Total past due		253	234
Acquired impaired	[1]	0	0
Current		19,889	29,913
Total loans		20,142	30,147
Consumer Portfolio Segment [Member] | Consumer Indirect [Member] | Acquired Loans [Member] | Past Due 30 - 89 Days [Member]
Aged analysis of the company's loans [Abstract]
Total past due		245	231
Consumer Portfolio Segment [Member] | Consumer Direct [Member]
Aged analysis of the company's loans [Abstract]
Total loans		179,929	191,815
Consumer Portfolio Segment [Member] | Consumer Direct [Member] | Legacy Loan [Member]
Aged analysis of the company's loans [Abstract]
90 + days past due and still accruing		48	58
Nonaccrual		0	0
Total past due		1,923	1,607
Current		172,556	180,315
Total loans		174,479	181,922
Consumer Portfolio Segment [Member] | Consumer Direct [Member] | Legacy Loan [Member] | Past Due 30 - 89 Days [Member]
Aged analysis of the company's loans [Abstract]
Total past due		1,875	1,549
Consumer Portfolio Segment [Member] | Consumer Direct [Member] | Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
90 + days past due and still accruing		0	0
Nonaccrual		0	0
Total past due		100	231
Acquired impaired	[1]	0	0
Current		5,350	9,662
Total loans		5,450	9,893
Consumer Portfolio Segment [Member] | Consumer Direct [Member] | Acquired Loans [Member] | Past Due 30 - 89 Days [Member]
Aged analysis of the company's loans [Abstract]
Total past due		100	231
Consumer Portfolio Segment [Member] | Home Equity [Member]
Aged analysis of the company's loans [Abstract]
Total loans		420,329	401,998
Consumer Portfolio Segment [Member] | Home Equity [Member] | Legacy Loan [Member]
Aged analysis of the company's loans [Abstract]
90 + days past due and still accruing		94	414
Nonaccrual		1,354	1,437
Total past due		2,564	3,101
Current		319,576	315,928
Total loans		322,140	319,029
Consumer Portfolio Segment [Member] | Home Equity [Member] | Legacy Loan [Member] | Past Due 30 - 89 Days [Member]
Aged analysis of the company's loans [Abstract]
Total past due		1,116	1,250
Consumer Portfolio Segment [Member] | Home Equity [Member] | Acquired Loans [Member]
Aged analysis of the company's loans [Abstract]
90 + days past due and still accruing		170	905
Nonaccrual		1,326	435
Total past due		2,130	2,118
Acquired impaired	[1]	0	0
Current		96,059	80,851
Total loans		98,189	82,969
Consumer Portfolio Segment [Member] | Home Equity [Member] | Acquired Loans [Member] | Past Due 30 - 89 Days [Member]
Aged analysis of the company's loans [Abstract]
Total past due		$ 634	$ 778

[1] Acquired impaired loans were not classified as nonperforming assets as the loans are considered to be performing under ASC 310-30. As a result interest income, through the accretion of the difference between the carrying amount of the loans and the expected cashflows, is being recognized on all acquired impaired loans.

XML

LOANS, Amount of Business Lending Loans by Credit Quality Category (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 6,256,757	$ 4,948,562
Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	4,619,663	4,453,202
Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,637,094	495,360
Business Lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	2,424,223	1,490,076
Business Lending [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,376,599	1,277,666
Business Lending [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,047,624	212,410
Business Lending [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	2,134,137	1,213,170
Business Lending [Member] | Pass [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,170,156	1,051,005
Business Lending [Member] | Pass [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	963,981	162,165
Business Lending [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	166,397	165,292
Business Lending [Member] | Special Mention [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	129,076	135,602
Business Lending [Member] | Special Mention [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	37,321	29,690
Business Lending [Member] | Classified [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	111,995	105,587
Business Lending [Member] | Classified [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	77,367	90,585
Business Lending [Member] | Classified [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	34,628	15,002
Business Lending [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,579	474
Business Lending [Member] | Doubtful [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	0	474
Business Lending [Member] | Doubtful [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,579	0
Business Lending [Member] | Acquired Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	10,115	5,553
Business Lending [Member] | Acquired Impaired [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Business Lending [Member] | Acquired Impaired [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	10,115	5,553
All Other Loans [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	3,243,064	3,175,536
All Other Loans [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	589,470	282,950
All Other Loans [Member] | Performing [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	3,229,051	3,160,929
All Other Loans [Member] | Performing [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	584,874	279,070
All Other Loans [Member] | Nonperforming [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	14,013	14,607
All Other Loans [Member] | Nonperforming [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	4,596	3,880
Consumer Mortgage [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,754,609	1,659,760
Consumer Mortgage [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	465,689	159,941
Consumer Mortgage [Member] | Performing [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,742,387	1,647,228
Consumer Mortgage [Member] | Performing [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	462,597	157,404
Consumer Mortgage [Member] | Nonperforming [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	12,222	12,532
Consumer Mortgage [Member] | Nonperforming [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	3,092	2,537
Consumer Indirect [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	991,836	1,014,825
Consumer Indirect [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	20,142	30,147
Consumer Indirect [Member] | Performing [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	991,541	1,014,659
Consumer Indirect [Member] | Performing [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	20,134	30,144
Consumer Indirect [Member] | Nonperforming [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	295	166
Consumer Indirect [Member] | Nonperforming [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	8	3
Consumer Direct [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	174,479	181,922
Consumer Direct [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	5,450	9,893
Consumer Direct [Member] | Performing [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	174,431	181,864
Consumer Direct [Member] | Performing [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	5,450	9,893
Consumer Direct [Member] | Nonperforming [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	48	58
Consumer Direct [Member] | Nonperforming [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Home Equity [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	322,140	319,029
Home Equity [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	98,189	82,969
Home Equity [Member] | Performing [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	320,692	317,178
Home Equity [Member] | Performing [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	96,693	81,629
Home Equity [Member] | Nonperforming [Member] | Legacy Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,448	1,851
Home Equity [Member] | Nonperforming [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 1,496	$ 1,340

XML

LOANS, Summary of Impaired Loans, Excluding Purchased Impaired (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Impaired loans [Abstract]
Loans with allowance allocation	$ 5,125	$ 1,109
Loans without allowance allocation	884	556
Carrying balance	6,009	1,665
Contractual balance	9,165	3,340
Specifically allocated allowance	804	477
Average impaired loans	9,517	4,683
Interest income recognized	$ 0	$ 0

XML

LOANS, Troubled Debt Restructuring (TDR) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($) Loan	Dec. 31, 2016 USD ($) Loan
Financing Receivable, Modifications [Line Items]
TDRs, number | Loan	226	214
TDRs, amount	$ 6,135	$ 5,530
Loans modified in TDR during the year, number | Loan	74	48
Loans modified in TDR during the year, amount	$ 2,268	$ 1,157
Maximum [Member]
Financing Receivable, Modifications [Line Items]
Threshold balance of TDR loans collectively included in general loan loss allocation and qualitative review	$ 500
Nonaccrual [Member]
Financing Receivable, Modifications [Line Items]
TDRs, number | Loan	72	56
TDRs, amount	$ 2,728	$ 1,832
Accruing [Member]
Financing Receivable, Modifications [Line Items]
TDRs, number | Loan	154	158
TDRs, amount	$ 3,407	$ 3,698
Residential Portfolio Segment [Member] | Consumer Mortgage [Member]
Financing Receivable, Modifications [Line Items]
TDRs, number | Loan	95	81
TDRs, amount	$ 4,015	$ 3,476
Loans modified in TDR during the year, number | Loan	23	9
Loans modified in TDR during the year, amount	$ 1,254	$ 597
Residential Portfolio Segment [Member] | Consumer Mortgage [Member] | Nonaccrual [Member]
Financing Receivable, Modifications [Line Items]
TDRs, number | Loan	51	36
TDRs, amount	$ 2,265	$ 1,520
Residential Portfolio Segment [Member] | Consumer Mortgage [Member] | Accruing [Member]
Financing Receivable, Modifications [Line Items]
TDRs, number | Loan	44	45
TDRs, amount	$ 1,750	$ 1,956
Commercial Portfolio Segment [Member] | Minimum [Member]
Financing Receivable, Modifications [Line Items]
Threshold balance of loan individually evaluated for impairment	$ 500
Commercial Portfolio Segment [Member] | Business Lending [Member]
Financing Receivable, Modifications [Line Items]
TDRs, number | Loan	15	11
TDRs, amount	$ 719	$ 781
Loans modified in TDR during the year, number | Loan	8	0
Loans modified in TDR during the year, amount	$ 412	$ 0
Commercial Portfolio Segment [Member] | Business Lending [Member] | Nonaccrual [Member]
Financing Receivable, Modifications [Line Items]
TDRs, number | Loan	8	6
TDRs, amount	$ 218	$ 91
Commercial Portfolio Segment [Member] | Business Lending [Member] | Accruing [Member]
Financing Receivable, Modifications [Line Items]
TDRs, number | Loan	7	5
TDRs, amount	$ 501	$ 690
Consumer Portfolio Segment [Member] | Consumer Indirect [Member]
Financing Receivable, Modifications [Line Items]
TDRs, number | Loan	71	78
TDRs, amount	$ 883	$ 771
Loans modified in TDR during the year, number | Loan	33	33
Loans modified in TDR during the year, amount	$ 490	$ 459
Consumer Portfolio Segment [Member] | Consumer Indirect [Member] | Nonaccrual [Member]
Financing Receivable, Modifications [Line Items]
TDRs, number | Loan	0	0
TDRs, amount	$ 0	$ 0
Consumer Portfolio Segment [Member] | Consumer Indirect [Member] | Accruing [Member]
Financing Receivable, Modifications [Line Items]
TDRs, number | Loan	71	78
TDRs, amount	$ 883	$ 771
Consumer Portfolio Segment [Member] | Consumer Direct [Member]
Financing Receivable, Modifications [Line Items]
TDRs, number | Loan	25	23
TDRs, amount	$ 69	$ 65
Loans modified in TDR during the year, number | Loan	6	3
Loans modified in TDR during the year, amount	$ 17	$ 51
Consumer Portfolio Segment [Member] | Consumer Direct [Member] | Nonaccrual [Member]
Financing Receivable, Modifications [Line Items]
TDRs, number | Loan	0	0
TDRs, amount	$ 0	$ 0
Consumer Portfolio Segment [Member] | Consumer Direct [Member] | Accruing [Member]
Financing Receivable, Modifications [Line Items]
TDRs, number | Loan	25	23
TDRs, amount	$ 69	$ 65
Consumer Portfolio Segment [Member] | Home Equity [Member]
Financing Receivable, Modifications [Line Items]
TDRs, number | Loan	20	21
TDRs, amount	$ 449	$ 437
Loans modified in TDR during the year, number | Loan	4	3
Loans modified in TDR during the year, amount	$ 95	$ 50
Consumer Portfolio Segment [Member] | Home Equity [Member] | Nonaccrual [Member]
Financing Receivable, Modifications [Line Items]
TDRs, number | Loan	13	14
TDRs, amount	$ 245	$ 221
Consumer Portfolio Segment [Member] | Home Equity [Member] | Accruing [Member]
Financing Receivable, Modifications [Line Items]
TDRs, number | Loan	7	7
TDRs, amount	$ 204	$ 216

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LOANS, Allowance for Loan Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Allowance for loan losses [Roll Forward]
Balance, beginning of period	$ 47,233	$ 45,401	$ 45,341
Charge-offs	(16,757)	(12,183)	(12,071)
Recoveries	6,123	5,939	5,684
Provision	10,984	8,076	6,447
Balance, end of period	47,583	47,233	45,401
Acquired Impaired [Member]
Allowance for loan losses [Roll Forward]
Balance, beginning of period	108	168	173
Charge-offs	(270)	(97)	(103)
Recoveries	0	0	0
Provision	309	37	98
Balance, end of period	147	108	168
Residential Portfolio Segment [Member] | Consumer Mortgage [Member]
Allowance for loan losses [Roll Forward]
Balance, beginning of period	10,094	10,198	10,286
Charge-offs	(707)	(647)	(1,374)
Recoveries	50	115	80
Provision	1,028	428	1,206
Balance, end of period	10,465	10,094	10,198
Commercial Portfolio Segment [Member] | Business Lending [Member]
Allowance for loan losses [Roll Forward]
Balance, beginning of period	17,220	15,749	15,787
Charge-offs	(4,959)	(1,872)	(2,146)
Recoveries	656	616	877
Provision	4,340	2,727	1,231
Balance, end of period	17,257	17,220	15,749
Consumer Portfolio Segment [Member] | Consumer Indirect [Member]
Allowance for loan losses [Roll Forward]
Balance, beginning of period	13,782	12,422	11,544
Charge-offs	(8,456)	(7,643)	(6,714)
Recoveries	4,516	4,168	3,943
Provision	3,626	4,835	3,649
Balance, end of period	13,468	13,782	12,422
Consumer Portfolio Segment [Member] | Consumer Direct [Member]
Allowance for loan losses [Roll Forward]
Balance, beginning of period	2,979	2,997	3,083
Charge-offs	(2,081)	(1,706)	(1,490)
Recoveries	849	901	722
Provision	1,292	787	682
Balance, end of period	3,039	2,979	2,997
Consumer Portfolio Segment [Member] | Home Equity [Member]
Allowance for loan losses [Roll Forward]
Balance, beginning of period	2,399	2,666	2,701
Charge-offs	(284)	(218)	(244)
Recoveries	52	139	62
Provision	(60)	(188)	147
Balance, end of period	2,107	2,399	2,666
Unallocated Financing Receivables [Member]
Allowance for loan losses [Roll Forward]
Balance, beginning of period	651	1,201	1,767
Charge-offs	0	0	0
Recoveries	0	0	0
Provision	449	(550)	(566)
Balance, end of period	$ 1,100	$ 651	$ 1,201

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PREMISES AND EQUIPMENT (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 241,575	$ 219,775
Accumulated depreciation	(118,182)	(107,457)
Premises and equipment, net	123,393	112,318
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	23,869	22,585
Bank Premises [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	131,647	116,663
Equipment and Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 86,059	$ 80,527

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GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 149,437	$ 57,541
Accumulated amortization	(58,779)	(41,839)
Net carrying amount	90,658	15,702
Finite-lived intangible assets, future amortization expense [Abstract]
2018	17,872
2019	15,033
2020	12,497
2021	10,665
2022	9,165
Thereafter	25,426
Net carrying amount	90,658	15,702
Components of goodwill [Abstract]
Goodwill	739,254	469,966	$ 468,076
Goodwill, activity	269,288	1,890
Accumulated impairment	(4,824)	(4,824)	(4,824)
Accumulated impairment, activity	0	0
Goodwill, net	734,430	465,142	$ 463,252
Goodwill, net, activity	269,288	1,890
Servicing Asset at Fair Value, Amount [Roll Forward]
Carrying value before valuation allowance at beginning of period	1,435	1,472
Additions	358	481
Merchants acquisition	64	0
Amortization	(499)	(518)
Carrying value before valuation allowance at end of period	1,358	1,435
Valuation allowance balance at beginning of period	0	0
Impairment charges	0	(226)
Impairment recoveries	0	226
Valuation allowance balance at end of period	0	0
Net carrying value at end of period	1,358	1,435
Fair value of MSRs at end of period	2,473	1,928
Principal balance of loans sold during the year	32,937	45,852
Principal balance of loans serviced for others	358,518	365,374
Custodial escrow balances maintained in connection with loans serviced for others	$ 5,363	$ 5,603
Key economic assumptions used to estimate the value of the MSRs [Abstract]
Weighted-average contractual life	21 years 3 months 18 days	20 years 9 months 18 days
Weighted-average constant prepayment rate (CPR)	11.10%	15.10%
Weighted-average discount rate	3.30%	3.50%
Core Deposit Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 62,902	$ 39,688
Accumulated amortization	(37,877)	(32,581)
Net carrying amount	25,025	7,107
Finite-lived intangible assets, future amortization expense [Abstract]
Net carrying amount	25,025	7,107
Other Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	86,535	17,853
Accumulated amortization	(20,902)	(9,258)
Net carrying amount	65,633	8,595
Finite-lived intangible assets, future amortization expense [Abstract]
Net carrying amount	$ 65,633	$ 8,595

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DEPOSITS (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
DEPOSITS [Abstract]
Noninterest checking	$ 2,293,057	$ 1,646,039
Interest checking	1,830,914	1,644,029
Savings	1,421,512	1,303,851
Money market	2,124,633	1,778,907
Time	774,304	703,128
Total deposits	8,444,420	7,075,954
Maturities of time deposits [Abstract]
2018	545,389
2019	100,833
2020	59,849
2021	34,582
2022	33,400
Thereafter	251
Total	774,304	$ 703,128
Maturities of time deposits, accounts $250,000 or greater [Abstract]
2018	51,875
2019	5,958
2020	7,445
2021	1,807
2022	601
Thereafter	0
Total	$ 67,686

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BORROWINGS, Outstanding Borrowings (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
BORROWINGS [Abstract]
FHLB overnight advance	$ 24,000	$ 146,200
Subordinated debt held by unconsolidated subsidiary trusts, net of discount of $332 and $357, respectively	122,814	102,170
Securities sold under agreement to repurchase, short term	337,011	0
FHLB Long term advances	2,071	0
Total borrowings	485,896	248,370
Subordinated debt held by unconsolidated subsidiary trust, discount	$ 332	$ 357

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BORROWINGS, Contractual Maturity on Borrowings (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Carrying value	$ 485,896	$ 248,370
Weighted-average rate at period end	1.34%
Weighted-average interest rate on borrowings during period	1.51%	1.46%
January 2, 2018 [Member]
Debt Instrument [Line Items]
Carrying value	$ 361,011
Weighted-average rate at period end	0.54%
July 3, 2023 [Member]
Debt Instrument [Line Items]
Carrying value	$ 601
Weighted-average rate at period end	2.25%
October 23, 2023 [Member]
Debt Instrument [Line Items]
Carrying value	$ 515
Weighted-average rate at period end	1.50%
October 1, 2025 [Member]
Debt Instrument [Line Items]
Carrying value	$ 329
Weighted-average rate at period end	1.50%
March 1, 2029 [Member]
Debt Instrument [Line Items]
Carrying value	$ 626
Weighted-average rate at period end	2.50%
July 31, 2031 [Member]
Debt Instrument [Line Items]
Carrying value	$ 24,875
Weighted-average rate at period end	4.96%
December 15, 2034 [Member]
Debt Instrument [Line Items]
Carrying value	$ 20,619
Weighted-average rate at period end	3.54%
December 15, 2036 [Member]
Debt Instrument [Line Items]
Carrying value	$ 77,320
Weighted-average rate at period end	3.24%

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BORROWINGS, Preferred Securities (Details) $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($) Trust
Debt Instrument [Line Items]
Number of unconsolidated subsidiary business trusts owned | Trust	3
Percent ownership of unconsolidated subsidiary trusts	100.00%
Preferred Debt [Member] | Community Statutory Trust III [Member]
Terms of preferred securities for each trust [Abstract]
Issuance date	Jul. 31, 2001
Par amount	$ 24.5
Variable interest rate basis	3 month LIBOR
Effective interest rate	4.96%
Maturity date	Jul. 31, 2031
Call price	Par
Preferred Debt [Member] | Community Statutory Trust III [Member] | LIBOR [Member]
Terms of preferred securities for each trust [Abstract]
Term of variable rate	3 months
Variable interest rate, basis spread	3.58%
Preferred Debt [Member] | Community Capital Trust IV [Member]
Terms of preferred securities for each trust [Abstract]
Issuance date	Dec. 08, 2006
Par amount	$ 75.0
Variable interest rate basis	3 month LIBOR
Effective interest rate	3.24%
Maturity date	Dec. 15, 2036
Call price	Par
Preferred Debt [Member] | Community Capital Trust IV [Member] | LIBOR [Member]
Terms of preferred securities for each trust [Abstract]
Term of variable rate	3 months
Variable interest rate, basis spread	1.65%
Preferred Debt [Member] | MBVT Statutory Trust I [Member]
Terms of preferred securities for each trust [Abstract]
Issuance date	Dec. 15, 2004
Par amount	$ 20.6
Variable interest rate basis	3 month LIBOR
Effective interest rate	3.54%
Maturity date	Dec. 15, 2034
Call price	Par
Preferred Debt [Member] | MBVT Statutory Trust I [Member] | LIBOR [Member]
Terms of preferred securities for each trust [Abstract]
Term of variable rate	3 months
Variable interest rate, basis spread	1.95%

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INCOME TAXES, Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current [Abstract]
Federal	$ 31,152	$ 32,829	$ 27,663
State and other	6,788	4,890	2,608
Deferred [Abstract]
Federal	(28,146)	11,444	9,604
State and other	(546)	1,622	1,112
Provision for income taxes	$ 9,248	$ 50,785	$ 40,987

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INCOME TAXES, Components of Net Deferred Tax Liability (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Components of net deferred tax liability [Abstract]
Allowance for loan losses	$ 11,675	$ 18,366
Employee benefits	4,216	6,311
Debt extinguishment	0	299
Other, net	0	5,202
Deferred tax asset	15,891	30,178
Investment securities	22,690	32,839
Tax-deductible goodwill	39,154	43,504
Loan origination costs	6,109	8,228
Depreciation	2,372	71
Mortgage servicing rights	330	548
Pension	13,228	18,194
Other, net	542	0
Deferred tax liability	84,425	103,384
Net deferred tax liability	$ (68,534)	$ (73,206)

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INCOME TAXES, Effective Tax Rate Reconciliation (Details)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Effective tax rate reconciliation [Abstract]
Federal statutory income tax rate	35.00%	35.00%	35.00%
Increase (reduction) in taxes resulting from [Abstract]
Tax-exempt interest	(3.80%)	(4.00%)	(5.00%)
State income taxes, net of federal benefit	2.50%	2.70%	1.80%
Stock-based compensation	(2.00%)	0.00%	0.00%
Federal deferred tax revaluation adjustment	(23.70%)	0.00%	0.00%
Other, net	(2.20%)	(0.90%)	(0.80%)
Effective income tax rate	5.80%	32.80%	31.00%

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INCOME TAXES, Unrecognized Tax Benefits and Tax Cuts and Jobs Act (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Unrecognized tax benefits [Roll forward]
Unrecognized tax benefits at beginning of year	$ 24	$ 92	$ 127	$ 162
Changes related to [Abstract]
Lapse of statutes of limitation		(68)	(35)	(35)
Unrecognized tax benefits at end of year		24	$ 92	$ 127
Unrecognized tax benefits that would impact effective tax rate, if recognized		$ 20
Income Tax Disclosure [Line Items]
Federal corporate tax rate		35.00%	35.00%	35.00%
Marginal tax rate		37.70%
Deferred tax benefit from write-down of net deferred tax liabilities		$ (38,000)
Plan [Member]
Income Tax Disclosure [Line Items]
Federal corporate tax rate	21.00%
Marginal tax rate	24.29%

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LIMITS ON DIVIDENDS AND OTHER REVENUE SOURCES (Details) $ in Millions	Dec. 31, 2017 USD ($)
LIMITS ON DIVIDENDS AND OTHER REVENUE SOURCES [Abstract]
Undivided profits legally available for the payments of dividends	$ 69.0
Percentage of Bank's capital and surplus that can be transferred to Company, maximum	10.00%
Aggregate percentage of Bank's capital and surplus that can be transferred to Company, maximum	20.00%

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BENEFIT PLANS, Funded Status and Amounts Recognized in Balance Sheets and AOCI (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2009	May 12, 2017
Change in plan assets [Roll Forward]
Fair value of plan assets at beginning of year	[1]	$ 180,086
Fair value of plan assets at end of year	[1]	216,476	$ 180,086
Amounts recognized in accumulated other comprehensive income (loss) ("AOCI") [Abstract]
AOCI at year end		$ 21,633	17,961	$ 21,283
Accumulated other comprehensive income (loss), negative postretirement medical plan amendment, arising during period, net of tax					$ 3,500
Stock Balance Plan [Member] | Nonemployee Directors [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Funding Status [Extensible List]		us-gaap:UnfundedPlanMember
Change in benefit obligation [Roll Forward]
Benefit obligation at the beginning of year		$ 100
Benefit obligation at end of year		100	100
Pension Benefits [Member]
Change in benefit obligation [Roll Forward]
Benefit obligation at the beginning of year		127,084	127,134
Service cost		4,181	4,106	3,324
Interest cost		5,717	5,624	5,506
Plan amendment / acquisition		11,646	22
Participant contributions		0	0
Deferred actuarial loss/(gain)		8,978	(1,628)
Benefits paid		(10,156)	(8,174)
Benefit obligation at end of year		147,450	127,084	127,134
Change in plan assets [Roll Forward]
Fair value of plan assets at beginning of year		180,400	172,026
Actual return of plan assets		22,954	14,402
Participant contributions		0	0
Employer contributions		9,839	2,146
Plan acquisition		14,070	0
Benefits paid		(10,156)	(8,174)
Fair value of plan assets at end of year		217,107	180,400	172,026
Over/(Under) funded status at year end		69,657	53,316
Amounts recognized in the consolidated statement of condition [Abstract]
Other assets		81,000	64,709
Other liabilities		(11,343)	(11,393)
Amounts recognized in accumulated other comprehensive income (loss) ("AOCI") [Abstract]
Net loss		26,935	28,323
Net prior service cost (credit)		2,944	2,264
Pre-tax AOCI		29,879	30,587
Taxes		(7,340)	(11,622)
AOCI at year end		$ 22,539	$ 18,965
Unamortized actuarial gain						$ 1,900
Discount rate		4.00%	4.50%			4.40%
Post-retirement Benefits [Member]
Change in benefit obligation [Roll Forward]
Benefit obligation at the beginning of year		$ 1,806	$ 1,918
Service cost		0	0	0
Interest cost		76	82	87
Plan amendment / acquisition		0	0
Participant contributions		467	516
Deferred actuarial loss/(gain)		245	174
Benefits paid		(809)	(884)
Benefit obligation at end of year		1,785	1,806	1,918
Change in plan assets [Roll Forward]
Fair value of plan assets at beginning of year		0	0
Actual return of plan assets		0	0
Participant contributions		467	516
Employer contributions		342	368
Plan acquisition		0	0
Benefits paid		(809)	(884)
Fair value of plan assets at end of year		0	0	$ 0
Over/(Under) funded status at year end		(1,785)	(1,806)
Amounts recognized in the consolidated statement of condition [Abstract]
Other assets		0	0
Other liabilities		(1,785)	(1,806)
Amounts recognized in accumulated other comprehensive income (loss) ("AOCI") [Abstract]
Net loss		420	183
Net prior service cost (credit)		(1,622)	(1,801)
Pre-tax AOCI		(1,202)	(1,618)
Taxes		296	614
AOCI at year end		$ (906)	$ (1,004)
Discount rate		4.00%	4.40%
Supplemental Pension Plans [Member] | Key Executives [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Funding Status [Extensible List]		us-gaap:UnfundedPlanMember
Change in benefit obligation [Roll Forward]
Benefit obligation at the beginning of year		$ 11,300
Benefit obligation at end of year		11,300	$ 11,300
Amounts recognized in accumulated other comprehensive income (loss) ("AOCI") [Abstract]
Benefit obligation for defined benefit pension plan prior to plan revaluation		$ 136,100	$ 115,700

[1] Excludes dividends and interest receivable totaling $0.6 million and $0.3 million at December 31, 2017 and 2016, respectively.

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BENEFIT PLANS, Amounts Recognized in AOCI, Net of Tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Amounts recognized in AOCI, net of tax [Abstract]
Net (gain) loss	$ (1,147)	$ 0	$ 0
Total	(168)	(3,322)	$ 4,567
Pension Benefits [Member]
Amounts recognized in AOCI, net of tax [Abstract]
Prior service cost/(credit)	424	(26)
Net (gain) loss	(851)	(3,517)
Total	(427)	(3,543)
Post-retirement Benefits [Member]
Amounts recognized in AOCI, net of tax [Abstract]
Prior service cost/(credit)	111	110
Net (gain) loss	148	111
Total	$ 259	$ 221

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BENEFIT PLANS, Costs That Will Be Amortized from AOCI in Next Fiscal Year (Details) $ in Thousands	Dec. 31, 2017 USD ($)
Pension Benefits [Member]
Costs that will be amortized from accumulated other comprehensive (income) loss in net periodic (income) cost in next fiscal year [Abstract]
Prior service credit	$ (330)
Net loss	1,054
Total	724
Post-retirement Benefits [Member]
Costs that will be amortized from accumulated other comprehensive (income) loss in net periodic (income) cost in next fiscal year [Abstract]
Prior service credit	(179)
Net loss	18
Total	$ (161)

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BENEFIT PLANS, Weighted-average Assumptions Used to Determine Benefit Obligations (Details)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	May 12, 2017
Pension Benefits [Member]
Weighed average assumption used in calculating benefit obligations [Abstract]
Discount rate	4.00%	4.50%	4.40%
Expected return on plan assets	7.00%	7.00%
Rate of compensation increase	3.50%	3.50%
Post-retirement Benefits [Member]
Weighed average assumption used in calculating benefit obligations [Abstract]
Discount rate	4.00%	4.40%

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BENEFIT PLANS, Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Prior service costs [Abstract]
Maximum percentage of net gain or loss over the greater of the projected benefit obligation or the market-related value of assets without requiring amortization	10.00%
Pension Benefits [Member]
Net periodic benefit cost [Abstract]
Service cost	$ 4,181	$ 4,106	$ 3,324
Interest cost	5,717	5,624	5,506
Expected return on plan assets	(13,354)	(11,842)	(12,169)
Plan amendment	0	20	0
Amortization of unrecognized net loss/(gain)	767	1,508	1,466
Amortization of prior service cost	55	43	8
Net periodic (benefit)	(2,634)	(541)	(1,865)
Post-retirement Benefits [Member]
Net periodic benefit cost [Abstract]
Service cost	0	0	0
Interest cost	76	82	87
Expected return on plan assets	0	0	0
Plan amendment	0	0	0
Amortization of unrecognized net loss/(gain)	8	(5)	(13)
Amortization of prior service cost	(179)	(179)	(179)
Net periodic (benefit)	$ (95)	$ (102)	$ (105)

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BENEFIT PLANS, Weighted-average Assumptions Used to Determine Net Periodic Benefit Cost (Details)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Pension Benefits [Member]
Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	4.40%	4.70%	4.50%
Expected return on plan assets	7.00%	7.00%	7.00%
Rate of compensation increase	3.50%	3.50%	3.50%
Post-retirement Benefits [Member]
Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	4.40%	4.70%	4.50%

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BENEFIT PLANS, Estimated Future Benefit Payments (Details) $ in Thousands	Dec. 31, 2017 USD ($)
Pension Benefits [Member]
Estimated Future Benefit Payments [Abstract]
2018	$ 8,702
2019	9,163
2020	9,404
2021	9,943
2022	10,378
2023-2027	56,064
Post-retirement Benefits [Member]
Estimated Future Benefit Payments [Abstract]
2018	145
2019	142
2020	139
2021	136
2022	133
2023-2027	$ 618

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BENEFIT PLANS, Target Plan Assets Allocation (Details)	Dec. 31, 2017
Equity Securities [Member]
Plan Assets [Abstract]
Target allocation percentage of assets	60.00%
Fixed Income Securities [Member]
Plan Assets [Abstract]
Target allocation percentage of assets	40.00%

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BENEFIT PLANS, Fair Value of Plan Assets by Assets Category (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	$ 216,476	$ 180,086
Total dividends and interest receivable excluded from plan assets		600	300
Quoted Prices in Active Markets For Identical Assets, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	196,336	166,117
Significant Observable Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	20,140	13,969
Significant Unobservable Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	0	0
Money Market Accounts [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		10,381	8,151
Money Market Accounts [Member] | Quoted Prices in Active Markets For Identical Assets, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	103
Money Market Accounts [Member] | Significant Observable Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		10,381	8,048
Money Market Accounts [Member] | Significant Unobservable Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		135,530	96,748
Equity Securities [Member] | Quoted Prices in Active Markets For Identical Assets, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		135,530	96,748
Equity Securities [Member] | Significant Observable Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
Equity Securities [Member] | Significant Unobservable Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
U.S. Large-Cap [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		53,154	43,235
U.S. Large-Cap [Member] | Quoted Prices in Active Markets For Identical Assets, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		53,154	43,235
U.S. Large-Cap [Member] | Significant Observable Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
U.S. Large-Cap [Member] | Significant Unobservable Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
U.S Mid/Small Cap [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		26,309	19,032
U.S Mid/Small Cap [Member] | Quoted Prices in Active Markets For Identical Assets, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		26,309	19,032
U.S Mid/Small Cap [Member] | Significant Observable Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
U.S Mid/Small Cap [Member] | Significant Unobservable Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
CBU Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		8,344	7,417
CBU Stock [Member] | Quoted Prices in Active Markets For Identical Assets, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		8,344	7,417
CBU Stock [Member] | Significant Observable Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
CBU Stock [Member] | Significant Unobservable Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
International [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		47,723	27,064
International [Member] | Quoted Prices in Active Markets For Identical Assets, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		47,723	27,064
International [Member] | Significant Observable Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
International [Member] | Significant Unobservable Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		59,190	63,106
Fixed Income Securities [Member] | Quoted Prices in Active Markets For Identical Assets, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		49,504	57,243
Fixed Income Securities [Member] | Significant Observable Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		9,686	5,863
Fixed Income Securities [Member] | Significant Unobservable Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
Government Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		23,615	31,238
Government Securities [Member] | Quoted Prices in Active Markets For Identical Assets, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		13,929	25,375
Government Securities [Member] | Significant Observable Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		9,686	5,863
Government Securities [Member] | Significant Unobservable Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
Investment Grade Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		19,278	15,253
Investment Grade Bonds [Member] | Quoted Prices in Active Markets For Identical Assets, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		19,278	15,253
Investment Grade Bonds [Member] | Significant Observable Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
Investment Grade Bonds [Member] | Significant Unobservable Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
High Yield [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[2]	16,297	16,615
High Yield [Member] | Quoted Prices in Active Markets For Identical Assets, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[2]	16,297	16,615
High Yield [Member] | Significant Observable Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[2]	0	0
High Yield [Member] | Significant Unobservable Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[2]	0	0
Other Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[3]	11,375	12,081
Other Investments [Member] | Quoted Prices in Active Markets For Identical Assets, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[3]	11,302	12,023
Other Investments [Member] | Significant Observable Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[3]	73	58
Other Investments [Member] | Significant Unobservable Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[3]	0	0
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		217,107	180,400	$ 172,026
Employer contributions		9,839	$ 2,146
Pension Benefits [Member] | Merchants Bank Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer contributions		2,000
Pension Benefits [Member] | Defined Benefit Pension Plan Excluding Merchant Bank Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer contributions		$ 7,200

[1] Excludes dividends and interest receivable totaling $0.6 million and $0.3 million at December 31, 2017 and 2016, respectively.

[2] This category is exchange-traded funds representing a diversified index of high yield corporate bonds.

[3] This category is comprised of exchange-traded funds and mutual funds holding non-traditional investment classes including private equity funds and alternative exchange funds.

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BENEFIT PLANS, Multi-employer Defined Benefit Plan (Details) - Multiemployer Plans, Pension [Member] - Pentegra DB Plan [Member] - Tupper Lake National Bank [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Jun. 30, 2016
Multiemployer Plans [Line Items]
Identification number	135645888
Plan number	333
Fair value of plan assets				$ 3,300,000
Projected benefit obligation				$ 4,800,000
Funded status	At least 80 percent
Period contributions	$ 100	$ 50	$ 30
Significance of employer contributions	false

XML

BENEFIT PLANS, Assumed Health Care Cost Trend Rate (Details)	12 Months Ended
	Dec. 31, 2017
Assumed Health Care Cost Trend Rates [Abstract]
Assumed health care cost trend rate for medical costs for participants younger than 65	7.25%
Assumed health care cost trend rate for medical cost for participants older than 65	5.00%
Assumed health care cost trend rate for prescription drugs	10.50%
Ultimate health care cost trend rate	3.89%
Year that rate reaches ultimate trend rate	2075

XML

BENEFIT PLANS, 401(K) Employee Stock Ownership Plan (Details) - 401(k) Employee Stock Ownership Plan [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Contribution Plan Disclosure [Line Items]
Percentage of first eligible compensation fully matched by employer	3.00%
Percentage of matching contribution in the form of common stock	100.00%
Percentage of the next eligible compensation matched at 50% by employer	3.00%
Percentage of matching contributions for the next eligible compensation in the form of company stock	50.00%
(Income)/expense recognized under plan	$ 5.3	$ 4.3	$ 3.6
Interest credit contribution expense recognized for 401(k) plan	$ 0.8	$ 0.7	$ 1.1
Minimum [Member]
Defined Contribution Plan Disclosure [Line Items]
Contribution from eligible compensation	1.00%
Maximum [Member]
Defined Contribution Plan Disclosure [Line Items]
Contribution from eligible compensation	90.00%

XML

BENEFIT PLANS, Other Deferred Compensation Arrangements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Liability recorded for compensation plan	$ 13,328	$ 0
Other Deferred Compensation Arrangements [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Liability recorded for compensation plan	3,100	3,200
Expense recognized under plan	$ 300	$ 30	$ 100

XML

BENEFIT PLANS, Deferred Compensation Plans for Directors (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Liability accrued for compensation plan	$ 13,328	$ 0
Deferred Compensation Plans for Directors [Member] | Directors [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Deferred compensation arrangement with individual, shares credited (in shares)	150,110	154,013
Liability accrued for compensation plan	$ 4,200	$ 4,000
Expense recognized under plan	$ 200	$ 200	$ 200

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STOCK-BASED COMPENSATION PLANS, Long-Term Incentive Program (Details) - shares				12 Months Ended
	May 17, 2017	May 14, 2014	May 25, 2011	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock authorized for stock-based compensation plan (in shares)				4,000,000
Additional shares of common stock authorized for stock-based compensation plan (in shares)	1,000,000	1,000,000	900,000
Number of shares available for grant (in shares)				1,700,000
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of options				10 years
Award vesting period				5 years

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STOCK-BASED COMPENSATION PLANS, Activity in Long-Term Incentive Program (Details) - Stock Options [Member] - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Options, Outstanding [Roll Forward]
Outstanding, beginning of period (in shares)	1,755,992	1,969,301
Granted (in shares)	197,943	330,383
Exercised (in shares)	(238,499)	(525,298)
Forfeited (in shares)	(7,140)	(18,394)
Outstanding, end of period (in shares)	1,708,296	1,755,992
Exercisable, end of period (in shares)	1,015,823
Weighted-average exercise price of shares [Abstract]
Outstanding, beginning of period (in dollars per share)	$ 30.85	$ 28.15
Granted (in dollars per share)	57.02	38.02
Exercised (in dollars per share)	25.72	25.12
Forfeited (in dollars per share)	37.47	34.47
Outstanding, end of period (in dollars per share)	34.57	$ 30.85
Exercisable, end of period (in dollars per share)	$ 29.57

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STOCK-BASED COMPENSATION PLANS, Summary of Stock Options Outstanding (Details) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($) $ / shares shares
Options [Abstract]
Options outstanding, shares (in shares) | shares	1,708,296
Options outstanding, weighted-average exercise price (in dollars per share)	$ 34.57
Options outstanding, weighted-average remaining life	6 years 7 days
Options exercisable, shares (in shares) | shares	1,015,823
Options exercisable, weighted-average exercise price (in dollars per share)	$ 29.57
Weighted-average remaining contractual term of outstanding stock options	6 years 7 days
Weighted-average remaining contractual term of outstanding and exercisable stock options	4 years 10 months 6 days
Aggregate intrinsic value of outstanding stock options | $	$ 33.4
Aggregate intrinsic value of exercisable stock options | $	$ 24.6
$0.00 - $18.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit (in dollars per share)	$ 0
Exercise price range, upper range limit (in dollars per share)	$ 18.00
Options [Abstract]
Options outstanding, shares (in shares) | shares	24,736
Options outstanding, weighted-average exercise price (in dollars per share)	$ 17.82
Options outstanding, weighted-average remaining life	1 year 3 months 22 days
Options exercisable, shares (in shares) | shares	24,736
Options exercisable, weighted-average exercise price (in dollars per share)	$ 17.82
$18.001 - $28.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit (in dollars per share)	18.001
Exercise price range, upper range limit (in dollars per share)	$ 28.00
Options [Abstract]
Options outstanding, shares (in shares) | shares	314,511
Options outstanding, weighted-average exercise price (in dollars per share)	$ 22.23
Options outstanding, weighted-average remaining life	2 years 11 months 5 days
Options exercisable, shares (in shares) | shares	314,511
Options exercisable, weighted-average exercise price (in dollars per share)	$ 22.23
$28.001 - $29.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit (in dollars per share)	28.001
Exercise price range, upper range limit (in dollars per share)	$ 29.00
Options [Abstract]
Options outstanding, shares (in shares) | shares	171,083
Options outstanding, weighted-average exercise price (in dollars per share)	$ 28.78
Options outstanding, weighted-average remaining life	4 years 2 months 19 days
Options exercisable, shares (in shares) | shares	171,083
Options exercisable, weighted-average exercise price (in dollars per share)	$ 28.78
$29.001 - $30.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit (in dollars per share)	29.001
Exercise price range, upper range limit (in dollars per share)	$ 30.00
Options [Abstract]
Options outstanding, shares (in shares) | shares	228,668
Options outstanding, weighted-average exercise price (in dollars per share)	$ 29.79
Options outstanding, weighted-average remaining life	5 years 2 months 12 days
Options exercisable, shares (in shares) | shares	176,843
Options exercisable, weighted-average exercise price (in dollars per share)	$ 29.79
$30.001 - $40.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit (in dollars per share)	30.001
Exercise price range, upper range limit (in dollars per share)	$ 40.00
Options [Abstract]
Options outstanding, shares (in shares) | shares	771,781
Options outstanding, weighted-average exercise price (in dollars per share)	$ 37.09
Options outstanding, weighted-average remaining life	7 years 3 months 11 days
Options exercisable, shares (in shares) | shares	317,005
Options exercisable, weighted-average exercise price (in dollars per share)	$ 37.06
$40.001 - $60.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit (in dollars per share)	40.001
Exercise price range, upper range limit (in dollars per share)	$ 60.00
Options [Abstract]
Options outstanding, shares (in shares) | shares	197,517
Options outstanding, weighted-average exercise price (in dollars per share)	$ 57.02
Options outstanding, weighted-average remaining life	9 years 1 month 20 days
Options exercisable, shares (in shares) | shares	11,645
Options exercisable, weighted-average exercise price (in dollars per share)	$ 57.12

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STOCK-BASED COMPENSATION PLANS, Stock-Based Compensation Expense Recognized (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense related to incentive and non-qualified stock options recognized	$ 2.2	$ 2.2	$ 1.8
Income tax benefit recognized	0.8	0.8	0.7
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense related to incentive and non-qualified stock options recognized	$ 2.7	$ 2.4	$ 2.2

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STOCK-BASED COMPENSATION PLANS, Assumptions Used to Estimate Value of Stock Options (Details) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
STOCK-BASED COMPENSATION PLANS [Abstract]
Fair value assumptions, method used	Black-Scholes model	Black-Scholes model	Black-Scholes model
Weighted-average Fair Value of Options Granted (in dollars per share)	$ 12.78	$ 7.90	$ 7.48
Assumptions [Abstract]
Weighted-average expected life	6 years 6 months	6 years 6 months	6 years 6 months
Future dividend yield	3.19%	3.43%	3.40%
Share price volatility	29.71%	30.00%	30.34%
Weighted-average risk-free interest rate	2.31%	1.72%	1.73%

XML

STOCK-BASED COMPENSATION PLANS, Unrecognized Stock-Based Compensation Expense and Stock Option Exercises (Details) - Stock Options [Member] - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock-based compensation expense related to non-vested stock options	$ 4.6
Weighted average period for recognition of unrecognized compensation cost	3 years 2 months 12 days
Total fair value of stock options vested	$ 2.2	$ 2.1	$ 1.9
Proceeds from stock option exercises	7.7	12.0
Related tax benefits from stock option exercises	$ 2.3	$ 2.7
Shares issued in connection with stock option exercise (in shares)	0.2	0.4
Total intrinsic value of options exercised	$ 7.6	$ 10.3	$ 7.6

XML

STOCK-BASED COMPENSATION PLANS, Activity of Unvested Restricted Stock Awards (Details) - Restricted Stock [Member] - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Restricted Shares [Roll Forward]
Unvested, beginning of period (in shares)	253,830	246,311
Awards (in shares)	46,428	148,240
Forfeitures (in shares)	(4,863)	(42,394)
Vestings (in shares)	(64,522)	(98,327)
Unvested, end of period (in shares)	230,873	253,830	246,311
Weighted-average grant date fair value [Abstract]
Unvested, beginning of period (in dollars per share)	$ 29.98	$ 27.85
Awards (in dollars per share)	57.02	27.04
Forfeitures (in dollars per share)	24.78	17.49
Vestings (in dollars per share)	33.69	25.64
Unvested, end of period (in dollars per share)	$ 34.06	$ 29.98	$ 27.85
Unrecognized stock-based compensation expense	$ 5.7
Award vesting period	5 years
Weighted-average period for recognition of unrecognized compensation cost	4 years 3 months 18 days
Total fair value of restricted stock vested	$ 2.2	$ 2.5	$ 1.7

XML

EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
EARNINGS PER SHARE [Abstract]
Weighted-average anti-dilutive stock options outstanding (in shares)	200	300	300
Basic earnings per share [Abstract]
Net income	$ 150,717	$ 103,812	$ 91,230
Income attributable to unvested stock-based compensation awards	(597)	(550)	(453)
Income available to common shareholders	$ 150,120	$ 103,262	$ 90,777
Weighted-average common shares outstanding - basic (in shares)	48,843	44,091	40,996
Basic earnings per share (in dollars per share)	$ 3.07	$ 2.34	$ 2.21
Diluted earnings per share [Abstract]
Net income	$ 150,717	$ 103,812	$ 91,230
Income attributable to unvested stock-based compensation awards	(597)	(550)	(453)
Income available to common shareholders	$ 150,120	$ 103,262	$ 90,777
Weighted-average common shares outstanding (in shares)	48,843	44,091	40,996
Assumed exercise of stock options (in shares)	627	394	405
Weighted-average common shares outstanding - diluted (in shares)	49,470	44,485	41,401
Diluted earnings per share (in dollars per share)	$ 3.03	$ 2.32	$ 2.19
Cash dividends declared per share (in dollars per share)	$ 1.32	$ 1.26	$ 1.22
Stock Repurchase Program [Abstract]
Number of common shares authorized to be repurchased (in shares)	2,500	2,200
Number of common shares repurchased (in shares)	0	0	300

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COMMITMENTS, CONTINGENT LIABILITIES AND RESTRICTIONS (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract amount of commitments and contingencies	$ 1,103,786	$ 796,098
Unused lines of credit	25,000
Federal Home Loan Bank unused borrowing capacity	1,680,000
Federal Reserve unused borrowing capacity	22,900
Federal Reserve required average total reserve	84,800
Federal Reserve requirement represented by cash on hand	73,200
Required deposit with Federal Reserve	11,600
Minimum [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Range of reasonably possible losses for such matters in the aggregate, beyond the existing recorded liability	0
Maximum [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Range of reasonably possible losses for such matters in the aggregate, beyond the existing recorded liability	1,000
Commitments to Extend Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract amount of commitments and contingencies	1,080,004	773,442
Standby Letters of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract amount of commitments and contingencies	$ 23,782	$ 22,656

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LEASES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
LEASES [Abstract]
Rental expense	$ 7,300	$ 5,800	$ 5,400
Future minimum rental commitments [Abstract]
2018	9,189
2019	8,194
2020	6,603
2021	5,164
2022	4,101
Thereafter	8,623
Total	$ 41,874

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REGULATORY MATTERS (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Tier 1 Leverage ratio [Abstract]
Tier 1 Leverage ratio, actual amount	$ 995,860	$ 858,347
Tier 1 Leverage ratio, actual ratio	10.00%	10.55%
Tier 1 leverage ratio for capital adequacy purposes, amount	$ 398,183	$ 325,438
Tier 1 leverage ratio for capital adequacy purposes, ratio	4.00%	4.00%
Tier 1 leverage capital to be well-capitalized under prompt corrective action, amount	$ 497,729	$ 406,798
Tier 1 leverage capital to be well-capitalized under prompt corrective action, ratio	5.00%	5.00%
Tier 1 risk-based capital [Abstract]
Tier 1 risk-based capital, actual amount	$ 995,860	$ 858,347
Tier 1 risk-based capital, actual ratio	16.64%	18.10%
Tier 1 risk-based capital for capital adequacy purposes, amount	$ 358,988	$ 284,583
Tier 1 risk-based capital for capital adequacy purposes, ratio	6.00%	6.00%
Tier 1 risk-based capital for capital adequacy purposes plus capital conservation buffer, amount	$ 433,777	$ 314,228
Tier 1 risk-based capital for capital adequacy purposes plus capital conservation buffer, ratio	7.25%	6.625%
Tier 1 risk based capital to be well-capitalized under prompt corrective action, amount	$ 478,651	$ 379,445
Tier 1 risk-based capital to be well-capitalized under prompt corrective action, ratio	8.00%	8.00%
Total risk-based capital [Abstract]
Total risk-based capital, actual amount	$ 1,043,910	$ 905,996
Total risk-based capital, actual ratio	17.45%	19.10%
Total risk-based capital for capital adequacy purposes, amount	$ 478,651	$ 379,445
Total risk-based capita for capital adequacy purposes, ratio	8.00%	8.00%
Total risk-based capital for capital adequacy purposes plus capital conservation buffer, amount	$ 553,440	$ 409,089
Total risk-based capita for capital adequacy purposes plus capital conservation buffer, ratio	9.25%	8.625%
Total risk based capital to be well-capitalized under prompt corrective action, amount	$ 598,314	$ 474,306
Total risk based capital to be well-capitalized under prompt corrective action, ratio	10.00%	10.00%
Common equity Tier 1 capital [Abstract]
Common equity Tier 1 capital, actual amount	$ 876,685	$ 759,199
Common equity Tier 1 capital, actual ratio	14.65%	16.01%
Common equity Tier 1 capital for capital adequacy purposes, amount	$ 269,241	$ 213,438
Common equity Tier 1 capital for capital adequacy purposes, ratio	4.50%	4.50%
Common equity Tier 1 capital for capital adequacy purposes plus capital conservation buffer, amount	$ 344,030	$ 243,082
Common equity Tier 1 capital for capital adequacy purposes plus capital conservation buffer, ratio	5.75%	5.125%
Common equity Tier 1 capital to be well-capitalized under prompt corrective action, amount	$ 388,904	$ 308,299
Common equity Tier 1 capital to be well-capitalized under prompt corrective action, ratio	6.50%	6.50%
Community Bank, N.A. [Member]
Tier 1 Leverage ratio [Abstract]
Tier 1 Leverage ratio, actual amount	$ 859,538	$ 672,633
Tier 1 Leverage ratio, actual ratio	8.71%	8.30%
Tier 1 leverage ratio for capital adequacy purposes, amount	$ 394,981	$ 324,080
Tier 1 leverage ratio for capital adequacy purposes, ratio	4.00%	4.00%
Tier 1 leverage capital to be well-capitalized under prompt corrective action, amount	$ 493,726	$ 405,099
Tier 1 leverage capital to be well-capitalized under prompt corrective action, ratio	5.00%	5.00%
Tier 1 risk-based capital [Abstract]
Tier 1 risk-based capital, actual amount	$ 859,538	$ 672,633
Tier 1 risk-based capital, actual ratio	14.50%	14.28%
Tier 1 risk-based capital for capital adequacy purposes, amount	$ 355,641	$ 282,662
Tier 1 risk-based capital for capital adequacy purposes, ratio	6.00%	6.00%
Tier 1 risk-based capital for capital adequacy purposes plus capital conservation buffer, amount	$ 429,733	$ 312,106
Tier 1 risk-based capital for capital adequacy purposes plus capital conservation buffer, ratio	7.25%	6.625%
Tier 1 risk based capital to be well-capitalized under prompt corrective action, amount	$ 474,188	$ 376,883
Tier 1 risk-based capital to be well-capitalized under prompt corrective action, ratio	8.00%	8.00%
Total risk-based capital [Abstract]
Total risk-based capital, actual amount	$ 907,588	$ 720,282
Total risk-based capital, actual ratio	15.31%	15.29%
Total risk-based capital for capital adequacy purposes, amount	$ 474,188	$ 376,883
Total risk-based capita for capital adequacy purposes, ratio	8.00%	8.00%
Total risk-based capital for capital adequacy purposes plus capital conservation buffer, amount	$ 548,280	$ 406,327
Total risk-based capita for capital adequacy purposes plus capital conservation buffer, ratio	9.25%	8.625%
Total risk based capital to be well-capitalized under prompt corrective action, amount	$ 592,736	$ 471,104
Total risk based capital to be well-capitalized under prompt corrective action, ratio	10.00%	10.00%
Common equity Tier 1 capital [Abstract]
Common equity Tier 1 capital, actual amount	$ 859,483	$ 672,578
Common equity Tier 1 capital, actual ratio	14.50%	14.28%
Common equity Tier 1 capital for capital adequacy purposes, amount	$ 266,731	$ 211,997
Common equity Tier 1 capital for capital adequacy purposes, ratio	4.50%	4.50%
Common equity Tier 1 capital for capital adequacy purposes plus capital conservation buffer, amount	$ 340,823	$ 241,441
Common equity Tier 1 capital for capital adequacy purposes plus capital conservation buffer, ratio	5.75%	5.125%
Common equity Tier 1 capital to be well-capitalized under prompt corrective action, amount	$ 385,278	$ 306,217
Common equity Tier 1 capital to be well-capitalized under prompt corrective action, ratio	6.50%	6.50%

XML

PARENT COMPANY STATEMENTS, Condensed Statements of Condition (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Assets [Abstract]
Cash and cash equivalents	$ 221,038	$ 173,857	$ 153,210	$ 138,396
Investment in and advances to [Abstract]
Other assets	249,488	180,188
Total assets	10,746,198	8,666,437	8,552,669
Liabilities and shareholders' equity [Abstract]
Accrued interest and other liabilities	180,567	144,013
Borrowings	122,814	102,170
Shareholders' equity	1,635,315	1,198,100	1,140,647	987,904
Total liabilities and shareholders' equity	10,746,198	8,666,437
Parent Company [Member]
Assets [Abstract]
Cash and cash equivalents	84,460	151,127	$ 97,317	$ 106,957
Investment securities	4,322	3,628
Investment in and advances to [Abstract]
Bank subsidiary	1,511,780	1,116,554
Non-bank subsidiaries	169,341	35,566
Other assets	9,150	10,345
Total assets	1,779,053	1,317,220
Liabilities and shareholders' equity [Abstract]
Accrued interest and other liabilities	20,924	16,950
Borrowings	122,814	102,170
Shareholders' equity	1,635,315	1,198,100
Total liabilities and shareholders' equity	$ 1,779,053	$ 1,317,220

XML

PARENT COMPANY STATEMENTS, Condensed Statements of Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Expenses [Abstract]
Interest on borrowings	$ 3,904	$ 2,949	$ 2,537
Acquisition expenses	25,986	1,706	7,037
Other expenses	18,540	16,553	13,521
Income before tax benefit and equity in undistributed net income of subsidiaries	159,965	154,597	132,217
Income tax benefit/(expense)	(9,248)	(50,785)	(40,987)
Net income	150,717	103,812	91,230
Other comprehensive (loss), net of tax [Abstract]
Changes in other comprehensive income/(loss) related to pension and other post retirement obligations	168	3,322	(4,567)
Changes in other comprehensive loss related to unrealized losses on available-for-sale securities	(11,065)	(14,714)	(6,918)
Other comprehensive (loss), net of tax	(10,897)	(11,392)	(11,485)
Comprehensive income	139,820	92,420	79,745
Parent Company [Member]
Dividends from subsidiaries [Abstract]
Bank subsidiary	91,000	89,000	70,000
Non-bank subsidiaries	35,500	1,750	6,000
Interest and dividends on investments	133	102	94
Total revenues	126,633	90,852	76,094
Expenses [Abstract]
Interest on borrowings	3,904	2,949	2,537
Acquisition expenses	91	429	0
Other expenses	26	11	19
Total expenses	4,021	3,389	2,556
Income before tax benefit and equity in undistributed net income of subsidiaries	122,612	87,463	73,538
Income tax benefit/(expense)	1,930	866	(572)
Income before equity in undistributed net income of subsidiaries	124,542	88,329	72,966
Equity in undistributed net income of subsidiaries	26,175	15,483	18,264
Net income	150,717	103,812	91,230
Other comprehensive (loss), net of tax [Abstract]
Changes in other comprehensive income/(loss) related to pension and other post retirement obligations	168	3,322	(4,567)
Changes in other comprehensive loss related to unrealized losses on available-for-sale securities	(11,065)	(14,714)	(6,918)
Other comprehensive (loss), net of tax	(10,897)	(11,392)	(11,485)
Comprehensive income	$ 139,820	$ 92,420	$ 79,745

XML

PARENT COMPANY STATEMENTS, Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating activities [Abstract]
Net income	$ 150,717	$ 103,812	$ 91,230
Adjustments to reconcile net income to net cash provided by operating activities [Abstract]
Net change in other assets and other liabilities	26,090	(7,614)	(5,681)
Net cash provided by operating activities	189,674	135,771	119,566
Investing activities [Abstract]
Cash (paid)/received for acquisitions, net of cash acquired of $150,534, $0, and $81,772, respectively	(107,414)	(575)	25,505
Net cash provided by/(used in) investing activities	131,371	(121,998)	(274,161)
Financing activities [Abstract]
Issuance of common stock	4,563	10,543	9,774
Purchase of treasury stock	(3,306)	(3,470)	(9,126)
Sale of treasury stock	10,060	8,888	16,571
Increase in deferred compensation arrangements	3,306	0	0
Net cash (used in)/provided by financing activities	(273,864)	6,874	169,409
Change in cash and cash equivalents	47,181	20,647	14,814
Cash and cash equivalents at beginning of year	173,857	153,210	138,396
Cash and cash equivalents at end of year	221,038	173,857	153,210
Supplemental disclosures of cash flow information [Abstract]
Cash paid for interest	13,705	11,268	11,252
Supplemental disclosures of noncash financing activities [Abstract]
Dividends declared and unpaid	17,460	14,268	13,605
Common stock issued for acquisition	343,132	0	102,202
Cash acquired related to acquisition	52,132	0	81,772
Parent Company [Member]
Operating activities [Abstract]
Net income	150,717	103,812	91,230
Adjustments to reconcile net income to net cash provided by operating activities [Abstract]
Equity in undistributed net income of subsidiaries	(26,175)	(15,483)	(18,264)
Net change in other assets and other liabilities	1,870	(215)	(27)
Net cash provided by operating activities	126,412	88,114	72,939
Investing activities [Abstract]
Proceeds from sale of investment securities	0	0	0
Cash (paid)/received for acquisitions, net of cash acquired of $150,534, $0, and $81,772, respectively	(139,471)	0	25,505
Capital contributions to subsidiaries	(11,063)	0	(80,231)
Net cash provided by/(used in) investing activities	(150,534)	0	(54,726)
Financing activities [Abstract]
Issuance of common stock	9,700	15,326	13,975
Purchase of treasury stock	(3,306)	(3,470)	(9,126)
Sale of treasury stock	10,060	8,888	16,571
Increase in deferred compensation arrangements	3,306	0	0
Cash dividends paid	(62,305)	(55,048)	(49,273)
Net cash (used in)/provided by financing activities	(42,545)	(34,304)	(27,853)
Change in cash and cash equivalents	(66,667)	53,810	(9,640)
Cash and cash equivalents at beginning of year	151,127	97,317	106,957
Cash and cash equivalents at end of year	84,460	151,127	97,317
Supplemental disclosures of cash flow information [Abstract]
Cash paid for interest	3,826	2,909	2,523
Supplemental disclosures of noncash financing activities [Abstract]
Dividends declared and unpaid	17,460	14,268	13,605
Capital contributions to subsidiaries	513,769	0	76,461
Common stock issued for acquisition	343,132	0	102,202
Cash acquired related to acquisition	$ 150,534	$ 0	$ 81,772

XML

FAIR VALUE, Financial Assets and Liabilities Accounted for at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Available-for-sale investment securities [Abstract]
Available-for-sale investment securities	$ 3,031,088	$ 2,748,656
Recurring [Member]
Available-for-sale investment securities [Abstract]
Available-for-sale investment securities	3,031,088	2,748,656
Mortgage loans held for sale	461	2,416
Total	3,031,802	2,751,129
Recurring [Member] | Commitments to Originate Real Estate Loans for Sale [Member]
Available-for-sale investment securities [Abstract]
Derivative asset	89	54
Recurring [Member] | Forward Sales Commitments [Member]
Available-for-sale investment securities [Abstract]
Derivative asset	4	3
Recurring [Member] | Interest Rate Swap Agreements [Member]
Available-for-sale investment securities [Abstract]
Derivative asset	1,064
Derivative liability	(904)
Recurring [Member] | U.S. Treasury and Agency Securities [Member]
Available-for-sale investment securities [Abstract]
Available-for-sale investment securities	2,054,071	1,902,762
Recurring [Member] | Obligations of State and Political Subdivisions [Member]
Available-for-sale investment securities [Abstract]
Available-for-sale investment securities	528,956	594,990
Recurring [Member] | Government Agency Mortgage-Backed Securities [Member]
Available-for-sale investment securities [Abstract]
Available-for-sale investment securities	357,538	235,230
Recurring [Member] | Corporate Debt Securities [Member]
Available-for-sale investment securities [Abstract]
Available-for-sale investment securities	2,623	5,687
Recurring [Member] | Government Agency Collateralized Mortgage Obligations [Member]
Available-for-sale investment securities [Abstract]
Available-for-sale investment securities	87,374	9,535
Recurring [Member] | Marketable Equity Securities [Member]
Available-for-sale investment securities [Abstract]
Available-for-sale investment securities	526	452
Recurring [Member] | Level 1 [Member]
Available-for-sale investment securities [Abstract]
Available-for-sale investment securities	1,909,816	1,903,214
Mortgage loans held for sale	0	0
Total	1,909,816	1,903,214
Recurring [Member] | Level 1 [Member] | Commitments to Originate Real Estate Loans for Sale [Member]
Available-for-sale investment securities [Abstract]
Derivative asset	0	0
Recurring [Member] | Level 1 [Member] | Forward Sales Commitments [Member]
Available-for-sale investment securities [Abstract]
Derivative asset	0	0
Recurring [Member] | Level 1 [Member] | Interest Rate Swap Agreements [Member]
Available-for-sale investment securities [Abstract]
Derivative asset	0
Derivative liability	0
Recurring [Member] | Level 1 [Member] | U.S. Treasury and Agency Securities [Member]
Available-for-sale investment securities [Abstract]
Available-for-sale investment securities	1,909,290	1,902,762
Recurring [Member] | Level 1 [Member] | Obligations of State and Political Subdivisions [Member]
Available-for-sale investment securities [Abstract]
Available-for-sale investment securities	0	0
Recurring [Member] | Level 1 [Member] | Government Agency Mortgage-Backed Securities [Member]
Available-for-sale investment securities [Abstract]
Available-for-sale investment securities	0	0
Recurring [Member] | Level 1 [Member] | Corporate Debt Securities [Member]
Available-for-sale investment securities [Abstract]
Available-for-sale investment securities	0	0
Recurring [Member] | Level 1 [Member] | Government Agency Collateralized Mortgage Obligations [Member]
Available-for-sale investment securities [Abstract]
Available-for-sale investment securities	0	0
Recurring [Member] | Level 1 [Member] | Marketable Equity Securities [Member]
Available-for-sale investment securities [Abstract]
Available-for-sale investment securities	526	452
Recurring [Member] | Level 2 [Member]
Available-for-sale investment securities [Abstract]
Available-for-sale investment securities	1,121,272	845,442
Mortgage loans held for sale	461	2,416
Total	1,121,897	847,861
Mortgage loans held for sale, at principal value	500
Mortgage loans held for sale, gross unrealized gain (Loss)	13
Recurring [Member] | Level 2 [Member] | Commitments to Originate Real Estate Loans for Sale [Member]
Available-for-sale investment securities [Abstract]
Derivative asset	0	0
Recurring [Member] | Level 2 [Member] | Forward Sales Commitments [Member]
Available-for-sale investment securities [Abstract]
Derivative asset	4	3
Recurring [Member] | Level 2 [Member] | Interest Rate Swap Agreements [Member]
Available-for-sale investment securities [Abstract]
Derivative asset	1,064
Derivative liability	(904)
Recurring [Member] | Level 2 [Member] | U.S. Treasury and Agency Securities [Member]
Available-for-sale investment securities [Abstract]
Available-for-sale investment securities	144,781	0
Recurring [Member] | Level 2 [Member] | Obligations of State and Political Subdivisions [Member]
Available-for-sale investment securities [Abstract]
Available-for-sale investment securities	528,956	594,990
Recurring [Member] | Level 2 [Member] | Government Agency Mortgage-Backed Securities [Member]
Available-for-sale investment securities [Abstract]
Available-for-sale investment securities	357,538	235,230
Recurring [Member] | Level 2 [Member] | Corporate Debt Securities [Member]
Available-for-sale investment securities [Abstract]
Available-for-sale investment securities	2,623	5,687
Recurring [Member] | Level 2 [Member] | Government Agency Collateralized Mortgage Obligations [Member]
Available-for-sale investment securities [Abstract]
Available-for-sale investment securities	87,374	9,535
Recurring [Member] | Level 2 [Member] | Marketable Equity Securities [Member]
Available-for-sale investment securities [Abstract]
Available-for-sale investment securities	0	0
Recurring [Member] | Level 3 [Member]
Available-for-sale investment securities [Abstract]
Available-for-sale investment securities	0	0
Mortgage loans held for sale	0	0
Total	89	54
Recurring [Member] | Level 3 [Member] | Commitments to Originate Real Estate Loans for Sale [Member]
Available-for-sale investment securities [Abstract]
Derivative asset	89	54
Recurring [Member] | Level 3 [Member] | Forward Sales Commitments [Member]
Available-for-sale investment securities [Abstract]
Derivative asset	0	0
Recurring [Member] | Level 3 [Member] | Interest Rate Swap Agreements [Member]
Available-for-sale investment securities [Abstract]
Derivative asset	0
Derivative liability	0
Recurring [Member] | Level 3 [Member] | U.S. Treasury and Agency Securities [Member]
Available-for-sale investment securities [Abstract]
Available-for-sale investment securities	0	0
Recurring [Member] | Level 3 [Member] | Obligations of State and Political Subdivisions [Member]
Available-for-sale investment securities [Abstract]
Available-for-sale investment securities	0	0
Recurring [Member] | Level 3 [Member] | Government Agency Mortgage-Backed Securities [Member]
Available-for-sale investment securities [Abstract]
Available-for-sale investment securities	0	0
Recurring [Member] | Level 3 [Member] | Corporate Debt Securities [Member]
Available-for-sale investment securities [Abstract]
Available-for-sale investment securities	0	0
Recurring [Member] | Level 3 [Member] | Government Agency Collateralized Mortgage Obligations [Member]
Available-for-sale investment securities [Abstract]
Available-for-sale investment securities	0	0
Recurring [Member] | Level 3 [Member] | Marketable Equity Securities [Member]
Available-for-sale investment securities [Abstract]
Available-for-sale investment securities	$ 0	$ 0

XML

FAIR VALUE, Assets and Liabilities Measured on Nonrecurring Basis (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of MSRs at end of period	$ 2,473	$ 1,928
Valuation allowance	804	477
Carrying value before valuation allowance at end of period	1,358	1,435	$ 1,472
Mortgage Servicing Rights [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of MSRs at end of period	2,500
Valuation allowance	0
Carrying value before valuation allowance at end of period	1,400
Other Real Estate Owned [Member] | Market Approach Valuation Technique [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total	$ 1,915	$ 1,966
Other Real Estate Owned [Member] | Market Approach Valuation Technique [Member] | Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	9.00%	9.00%
Other Real Estate Owned [Member] | Market Approach Valuation Technique [Member] | Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	99.00%	97.00%
Level 3 [Member] | Other Real Estate Owned [Member] | Market Approach Valuation Technique [Member] | Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	9.00%
Level 3 [Member] | Other Real Estate Owned [Member] | Market Approach Valuation Technique [Member] | Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	99.00%
Non-recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 0	$ 633
Other real estate owned	1,915	1,966
Total	1,915	2,599
Non-recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Other real estate owned	0	0
Total	0	0
Non-recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Other real estate owned	0	0
Total	0	0
Non-recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	633
Other real estate owned	1,915	1,966
Total	$ 1,915	$ 2,599

XML

FAIR VALUE, Significant Unobservable Inputs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Other Real Estate Owned [Member] | Fair Value of Collateral [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value	$ 1,915	$ 1,966
Other Real Estate Owned [Member] | Fair Value of Collateral [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Estimated cost of disposal/market adjustment	9.00%	9.00%
Other Real Estate Owned [Member] | Fair Value of Collateral [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Estimated cost of disposal/market adjustment	99.00%	97.00%
Other Real Estate Owned [Member] | Fair Value of Collateral [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Estimated cost of disposal/market adjustment	38.50%	29.60%
Impaired Loans [Member] | Fair Value of Collateral [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value		$ 633
Impaired Loans [Member] | Fair Value of Collateral [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Estimated cost of disposal/market adjustment		15.00%
Impaired Loans [Member] | Fair Value of Collateral [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Estimated cost of disposal/market adjustment		50.00%
Impaired Loans [Member] | Fair Value of Collateral [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Estimated cost of disposal/market adjustment		36.50%
Commitments to Originate Real Estate Loans for Sale [Member] | Discounted Cash Flow [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value	$ 89	$ 54
Embedded servicing value	1.00%	1.00%

XML

FAIR VALUE, Carrying Amounts and Estimated Fair Values of Other Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Carrying Value [Member]
Financial assets [Abstract]
Net loans	$ 6,209,174	$ 4,901,329
Financial liabilities [Abstract]
Deposits	8,444,420	7,075,954
Short-term borrowings	24,000	146,200
Securities sold under agreement to repurchase, short-term	337,011	0
Other long-term debt	2,071	0
Subordinated debt held by unconsolidated subsidiary trusts	122,814	102,170
Fair Value [Member]
Financial assets [Abstract]
Net loans	6,244,941	4,935,140
Financial liabilities [Abstract]
Deposits	8,431,481	7,071,191
Short-term borrowings	24,000	146,200
Securities sold under agreement to repurchase, short-term	337,011	0
Other long-term debt	2,021	0
Subordinated debt held by unconsolidated subsidiary trusts	$ 122,814	$ 90,144

XML

DERIVATIVE INSTRUMENTS (Details) - Interest Rate Swap [Member] $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($)
Derivative [Line Items]
Derivative, notional amount	$ 38.9
Derivative weighted average receive rate	3.38%
Derivative weighted average pay rate	3.84%
Weighted average maturity period	6 years 6 months
Other Assets [Member]
Derivative [Line Items]
Fair value of derivate assets	$ 0.9
Other Liabilities [Member]
Derivative [Line Items]
Fair value of derivate liability	0.9
Designated as Hedging Instrument [Member] | Fair Value Hedging [Member]
Derivative [Line Items]
Derivative, notional amount	$ 7.0
Derivative weighted average receive rate	2.30%
Derivative weighted average pay rate	3.11%
Weighted average maturity period	15 years 6 months
Designated as Hedging Instrument [Member] | Fair Value Hedging [Member] | Other Assets [Member]
Derivative [Line Items]
Fair value of derivate assets	$ 0.2

XML

VARIABLE INTEREST ENTITIES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Variable Interest Entity [Line Items]
Cash and cash equivalents	$ 221,038	$ 173,857	$ 153,210	$ 138,396
Premises and equipment, net	123,393	112,318
Other assets	249,488	180,188
Variable Interest Entity, Primary Beneficiary [Member] | 706 North Clinton [Member]
Variable Interest Entity [Line Items]
Cash and cash equivalents	74	30
Premises and equipment, net	6,266	6,429
Other assets	5	0
Total assets	6,345	6,459
Accrued interest and other liabilities / Total liabilities	0	$ 1
Minority interest	3,200
Loss of minority interest	4,700
Minority interest loss exposure related to financing agreement	$ 1,500
Variable Interest Entity, Primary Beneficiary [Member] | 706 North Clinton [Member] | Oneida Preferred Funding II LLC [Member]
Variable Interest Entity [Line Items]
Percentage of membership interest	50.00%

XML

SEGMENT INFORMATION (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Information about reportable segments [Abstract]
Net interest income	$ 315,675	$ 273,896	$ 248,420
(Benefit)/provision for loan losses	10,984	8,076	6,447
Noninterest income	202,423	155,625	123,299
Amortization of intangible assets	16,941	5,479	3,663
Acquisition expenses	25,986	1,706	7,037
Other operating expenses	304,222	259,663	222,355
Income before income taxes	159,965	154,597	132,217
Assets	10,746,198	8,666,437	8,552,669
Goodwill	734,430	465,142	463,252
Eliminations [Member]
Information about reportable segments [Abstract]
Net interest income	0	0	0
(Benefit)/provision for loan losses	0	0	0
Noninterest income	(2,858)	(2,442)	(2,156)
Amortization of intangible assets	0	0	0
Acquisition expenses	0	0	0
Other operating expenses	(2,858)	(2,442)	(2,156)
Income before income taxes	0	0	0
Assets	(29,638)	(41,790)	(65,637)
Goodwill	0	0	0
Banking [Member] | Operating Segments [Member]
Information about reportable segments [Abstract]
Net interest income	315,025	273,542	248,167
(Benefit)/provision for loan losses	10,984	8,076	6,447
Noninterest income	73,337	66,059	57,704
Amortization of intangible assets	5,296	2,682	2,803
Acquisition expenses	24,549	1,005	6,947
Other operating expenses	218,608	190,263	174,918
Income before income taxes	128,925	137,575	114,756
Assets	10,505,919	8,598,057	8,513,228
Goodwill	629,916	440,870	439,052
Employee Benefit Services [Member] | Operating Segments [Member]
Information about reportable segments [Abstract]
Net interest income	396	162	132
(Benefit)/provision for loan losses	0	0	0
Noninterest income	82,743	48,261	46,784
Amortization of intangible assets	8,578	420	515
Acquisition expenses	1,194	445	21
Other operating expenses	51,138	36,892	35,197
Income before income taxes	22,229	10,666	11,183
Assets	203,369	38,742	35,011
Goodwill	84,449	8,019	8,019
All Other [Member] | Operating Segments [Member]
Information about reportable segments [Abstract]
Net interest income	254	192	121
(Benefit)/provision for loan losses	0	0	0
Noninterest income	49,201	43,747	20,967
Amortization of intangible assets	3,067	2,377	345
Acquisition expenses	243	256	69
Other operating expenses	37,334	34,950	14,396
Income before income taxes	8,811	6,356	6,278
Assets	66,548	71,428	70,067
Goodwill	$ 20,065	$ 16,253	$ 16,181