10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 10-Q

(Mark One)

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2018

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from                      to                     

Commission File Number 000-08467

WESBANCO, INC.

(Exact name of Registrant as specified in its charter)

WEST VIRGINIA	55-0571723
(State of incorporation)	(IRS Employer Identification No.)
1 Bank Plaza, Wheeling, WV	26003
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code: 304-234-9000

NOT APPLICABLE

(Former name, former address and former fiscal year, if changed since last report)

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 (section 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 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 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	☐  (Do not check if a smaller reporting company)	Smaller reporting company	☐
		Emerging growth 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 by Rule 12b-2 of the Exchange Act).

    Yes   ☐     No   ☑

As of April 23, 2018, there were 46,568,911 shares of WesBanco, Inc. common stock, $2.0833 par value, outstanding.

WESBANCO, INC.

TABLE OF CONTENTS

Item No.	ITEM	Page No.
	PART I – FINANCIAL INFORMATION
1	Financial Statements
	Consolidated Balance Sheets at March 31, 2018 (unaudited) and December 31, 2017		3
	Consolidated Statements of Comprehensive Income for the three months ended March 31, 2018 and 2017 (unaudited)		4
	Consolidated Statements of Changes in Shareholders’ Equity for the three months ended March 31, 2018 and 2017 (unaudited)		5
	Consolidated Statements of Cash Flows for the three months ended March 31, 2018 and 2017 (unaudited)		6
	Notes to Consolidated Financial Statements (unaudited)		7
2	Management’s Discussion and Analysis of Financial Condition and Results of Operations		29
3	Quantitative and Qualitative Disclosures About Market Risk		48
4	Controls and Procedures		51
	PART II – OTHER INFORMATION
1	Legal Proceedings		52
2	Unregistered Sales of Equity Securities and Use of Proceeds		52
6	Exhibits		53
	Signatures		54

PART I — FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS

WESBANCO, INC. CONSOLIDATED BALANCE SHEETS

(unaudited, in thousands, except shares)	March 31, 2018			December 31, 2017
ASSETS
Cash and due from banks, including interest bearing amounts of $9,484 and $19,826, respectively	$	100,845		$	117,572
Securities:
Equity securities, at fair value		13,986			13,457
Available-for-sale debt securities, at fair value		1,728,377			1,261,865
Held-to-maturity debt securities (fair values of $1,005,502 and $1,023,784, respectively)		1,006,042			1,009,500
Total securities		2,748,405			2,284,822
Loans held for sale		12,962			20,320
Portfolio loans, net of unearned income		6,322,538			6,341,441
Allowance for loan losses		(46,334	)		(45,284	)
Net portfolio loans		6,276,204			6,296,157
Premises and equipment, net		128,583			130,722
Accrued interest receivable		31,963			29,728
Goodwill and other intangible assets, net		588,339			589,264
Bank-owned life insurance		191,839			192,589
Other assets		166,279			155,004
Total Assets	$	10,245,419		$	9,816,178
LIABILITIES
Deposits:
Non-interest bearing demand	$	1,950,619		$	1,846,748
Interest bearing demand		1,768,977			1,625,015
Money market		984,429			1,024,856
Savings deposits		1,314,632			1,269,912
Certificates of deposit		1,207,669			1,277,057
Total deposits		7,226,326			7,043,588
Federal Home Loan Bank borrowings		1,166,939			948,203
Other short-term borrowings		207,653			184,805
Subordinated debt and junior subordinated debt		164,379			164,327
Total borrowings		1,538,971			1,297,335
Accrued interest payable		4,033			3,178
Other liabilities		73,063			76,756
Total Liabilities		8,842,393			8,420,857
SHAREHOLDERS’ EQUITY
Preferred stock, no par value; 1,000,000 shares authorized; none outstanding		—			—
Common stock, $2.0833 par value; 100,000,000 shares authorized in 2018 and 2017, respectively; 44,060,957 and 44,043,244 shares issued, respectively; 44,060,957 and 44,043,244 shares outstanding, respectively		91,793			91,756
Capital surplus		686,169			684,730
Retained earnings		673,174			651,357
Treasury stock (0 shares in 2018 and 2017, respectively, at cost)		—			—
Accumulated other comprehensive loss		(47,076	)		(31,495	)
Deferred benefits for directors		(1,034	)		(1,027	)
Total Shareholders’ Equity		1,403,026			1,395,321
Total Liabilities and Shareholders’ Equity	$	10,245,419		$	9,816,178

See Notes to Consolidated Financial Statements.

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WESBANCO, INC. CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

	For the Three Months Ended March 31,
(unaudited, in thousands, except shares and per share amounts)	2018			2017
INTEREST AND DIVIDEND INCOME
Loans, including fees	$	69,237		$	64,898
Interest and dividends on securities:
Taxable		11,543			9,596
Tax-exempt		4,834			4,891
Total interest and dividends on securities		16,377			14,487
Other interest income		803			539
Total interest and dividend income		86,417			79,924
INTEREST EXPENSE
Interest bearing demand deposits		2,524			1,093
Money market deposits		878			574
Savings deposits		189			181
Certificates of deposit		2,536			2,411
Total interest expense on deposits		6,127			4,259
Federal Home Loan Bank borrowings		4,498			2,836
Other short-term borrowings		558			297
Subordinated debt and junior subordinated debt		1,942			1,813
Total interest expense		13,125			9,205
NET INTEREST INCOME		73,292			70,719
Provision for credit losses		2,168			2,711
Net interest income after provision for credit losses		71,124			68,008
NON-INTEREST INCOME
Trust fees		6,503			6,143
Service charges on deposits		4,822			4,853
Electronic banking fees		4,829			4,528
Net securities brokerage revenue		1,670			1,762
Bank-owned life insurance		2,756			1,140
Mortgage banking income		1,004			1,440
Net securities (losses) gains		(39	)		12
Net gain (loss) on other real estate owned and other assets		262			(76	)
Other income		2,173			3,082
Total non-interest income		23,980			22,884
NON-INTEREST EXPENSE
Salaries and wages		25,006			23,002
Employee benefits		6,912			8,210
Net occupancy		4,656			4,327
Equipment		3,949			4,042
Marketing		1,116			824
FDIC insurance		658			827
Amortization of intangible assets		1,086			1,273
Restructuring and merger-related expense		245			491
Other operating expenses		10,943			11,388
Total non-interest expense		54,571			54,384
Income before provision for income taxes		40,533			36,508
Provision for income taxes		7,004			10,622
NET INCOME	$	33,529		$	25,886
EARNINGS PER COMMON SHARE
Basic	$	0.76		$	0.59
Diluted	$	0.76		$	0.59
AVERAGE COMMON SHARES OUTSTANDING
Basic		44,050,701			43,947,563
Diluted		44,168,242			44,020,765
DIVIDENDS DECLARED PER COMMON SHARE	$	0.29		$	0.26
COMPREHENSIVE INCOME	$	19,011		$	28,171

See Notes to Consolidated Financial Statements.

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WESBANCO, INC. CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS’ EQUITY

For the Three Months Ended March 31, 2018 and 2017

	Common Stock				Capital Surplus			Retained Earnings			Treasury Stock		Accumulated Other Comprehensive (Loss) Income			Deferred Benefits for Directors			Total
(unaudited, in thousands, except shares and per share amounts)	Shares Outstanding		Amount
December 31, 2017		44,043,244	$	91,756	$	684,730		$	651,357		$	—	$	(31,495	)	$	(1,027	)	$	1,395,321
Net income		—		—		—			33,529			—		—			—			33,529
Other comprehensive income		—		—		—			—			—		(14,518	)		—			(14,518	)
Comprehensive income		—		—		—			—			—		—			—			19,011
Common dividends declared ($0.29 per share)		—		—		—			(12,775	)		—		—			—			(12,775	)
Adoption of accounting standard ASU 2016-01		—		—		—			1,063			—		(1,063	)		—			—
Stock options exercised		17,713		37		523			—			—		—			—			560
Stock compensation expense		—		—		909			—			—		—			—			909
Deferred benefits for directors- net		—		—		7			—			—		—			(7	)		—
March 31, 2018		44,060,957	$	91,793	$	686,169		$	673,174		$	—	$	(47,076	)	$	(1,034	)	$	1,403,026
December 31, 2016		43,931,715	$	91,524	$	680,507		$	597,071		$	—	$	(27,126	)	$	(568	)	$	1,341,408
Net income		—		—		—			25,886			—		—			—			25,886
Other comprehensive income		—		—		—			—			—		2,285			—			2,285
Comprehensive income		—		—		—			—			—		—			—			28,171
Common dividends declared ($0.26 per share)		—		—		—			(11,429	)		—		—			—			(11,429	)
Stock options exercised		17,634		36		490			—			—		—			—			526
Restricted stock granted		3,702		8		(8	)		—			—		—			—			—
Stock compensation expense		—		—		477			—			—		—			—			477
Deferred benefits for directors- net		—		—		5			—			—		—			(5	)		—
March 31, 2017		43,953,051	$	91,568	$	681,471		$	611,528		$	—	$	(24,841	)	$	(573	)	$	1,359,153

See Notes to Consolidated Financial Statements.

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WESBANCO, INC. CONSOLIDATED STATEMENTS OF CASH FLOWS

	For the Three Months Ended March 31,
(unaudited, in thousands)	2018			2017
NET CASH PROVIDED BY OPERATING ACTIVITIES	$	32,371		$	47,508
INVESTING ACTIVITIES
Net decrease (increase) in loans held for investment		19,923			(63,701	)
Debt securities available-for-sale:
Proceeds from maturities, prepayments and calls		53,496			59,043
Purchases of securities		(540,624	)		(41,742	)
Debt securities held-to-maturity:
Proceeds from maturities, prepayments and calls		17,121			24,367
Purchases of securities		(15,343	)		(16,023	)
Equity securities:
Purchases of securities		(558	)		—
Proceeds from bank-owned life insurance		3,506			—
Purchases of premises and equipment – net		(328	)		(2,311	)
Net cash used in investing activities		(462,807	)		(40,367	)
FINANCING ACTIVITIES
Increase in deposits		183,012			105,344
Proceeds from Federal Home Loan Bank borrowings		375,000			170,000
Repayment of Federal Home Loan Bank borrowings		(156,261	)		(201,825	)
Increase (decrease) in other short-term borrowings		27,848			(25,733	)
Decrease in federal funds purchased		(5,000	)		(58,000	)
Dividends paid to common shareholders		(11,450	)		(10,539	)
Issuance of common stock		560			526
Net cash provided by (used in) financing activities		413,709			(20,227	)
Net decrease in cash and cash equivalents		(16,727	)		(13,086	)
Cash and cash equivalents at beginning of the period		117,572			128,170
Cash and cash equivalents at end of the period	$	100,845		$	115,084
SUPPLEMENTAL DISCLOSURES
Interest paid on deposits and other borrowings	$	12,496		$	9,441
Income taxes paid		—			250
Transfers of loans to other real estate owned		—			77

See Notes to Consolidated Financial Statements.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of presentation — The accompanying unaudited interim financial statements of WesBanco, Inc. and its consolidated subsidiaries (“WesBanco”) have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements and should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2017.

WesBanco’s interim financial statements have been prepared following the significant accounting policies disclosed in Note 1 of the Notes to the Consolidated Financial Statements of its 2017 Annual Report on Form 10-K filed with the Securities and Exchange Commission. In the opinion of management, the accompanying interim financial information reflects all adjustments, including normal recurring adjustments, necessary to present fairly WesBanco’s financial position and results of operations for each of the interim periods presented. Certain prior period amounts have been reclassified to conform to the current period presentation. Such reclassifications had no impact on WesBanco’s net income and stockholders’ equity. Results of operations for interim periods are not necessarily indicative of the results of operations that may be expected for a full year.

Recent accounting pronouncements — In August 2017, the FASB issued ASU No. 2017-12, “Targeted Improvements to Accounting for Hedging Activities.” The new guidance will make more financial and nonfinancial hedging strategies eligible for hedge accounting. It also amends the presentation and disclosure requirements and changes how companies assess effectiveness. It is intended to more closely align hedge accounting with companies’ risk management strategies, simplify the application of hedge accounting, and increase transparency as to the scope and results of hedging programs. The guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. Early adoption is permitted, including adoption in an interim period. WesBanco is assessing the impact of ASU 2017-12 on WesBanco’s Consolidated Financial Statements.

In March 2017, the FASB issued ASU 2017-07 that changes how an employer presents the net periodic benefit cost in the income statement for an employer-sponsored defined benefit pension and/or other postretirement benefit plans. Employers will present the service cost component of net periodic benefit cost in the same income statement line item as other employee compensation costs arising from services rendered during the period. Only the service cost component will be eligible for capitalization in assets. Employers will present the other components of the net periodic benefit cost separately from the line items that includes the service cost outside of any subtotal of operating income, if one is presented. These components will not be eligible for capitalization in assets. For public business entities, the amendments in this update are effective for annual reporting periods beginning after December 15, 2017, including interim reporting periods within those annual reporting periods. Early adoption is permitted as of the beginning of an annual period (i.e., only in the first interim period). For WesBanco, this update was effective for the fiscal year beginning January 1, 2018. Upon adoption, WesBanco reclassified the service cost component from employee benefits to salaries and wages, which are both components of non-interest expense. The service cost component for the three months ended March 31, 2018 was $0.7 million.

In January 2017, the FASB issued ASU No. 2017-01, which clarifies the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. ASU 2017-01 will be effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017, which for WesBanco was effective for the fiscal year beginning January 1, 2018. The adoption of this pronouncement did not have a material impact on WesBanco’s Consolidated Financial Statements.

In October 2016, the FASB issued ASU 2016-16 that provides the recognition of income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. Current guidance prohibits the recognition of current and deferred income taxes for an intra-entity asset transfer until the asset has been sold to an outside party. This prohibition on recognition is an exception to the principle of comprehensive recognition of current and deferred income taxes in generally accepted accounting principles. The exception has led to diversity in practice and is a source of complexity in financial reporting. FASB decided that an entity should recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. Consequently, the amendments in this update eliminate the exception for an intra-entity transfer of an asset other than inventory. The amendments in this update do not include new disclosure requirements; however, existing disclosure requirements might be applicable when accounting for the current and deferred income taxes for an intra-entity transfer of an asset other than inventory. For public business entities, the amendments in this update are effective for annual reporting periods beginning after December 15, 2017, including interim reporting periods within those annual reporting periods, which for WesBanco was effective for the fiscal year beginning January 1, 2018. The amendments in this update should be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The adoption of this pronouncement did not have a material impact on WesBanco’s Consolidated Financial Statements.

In August 2016, the FASB issued ASU 2016-15 that provides guidance for the classification of cash flows related to (1) debt prepayment or extinguishment costs, (2) settlement of zero-coupon debt instruments or other debt instruments with coupon rates that are insignificant in relation to the effective interest rate on 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, (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. Public business entities must apply the new requirements for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years, which for WesBanco was effective for the fiscal year beginning January 1, 2018. Early adoption is permitted. The adoption of this pronouncement did not have a material impact on WesBanco’s Consolidated Financial Statements.

In June 2016, the FASB issued ASU 2016-13 that will require entities to use a new forward-looking “expected loss” model on trade and other receivables, held-to-maturity debt securities, loans and other instruments that generally will result in the earlier recognition of allowances for credit losses. For available-for-sale debt securities with unrealized losses, entities will measure credit losses in a manner similar to what they do today, except that the losses will be recognized as allowances rather than reductions in the amortized cost of the securities. Entities will have to disclose

7

significantly more information, including information they use to track credit quality by year of origination for most financing receivables. Public business entities must apply the new requirements for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years, which for WesBanco will be effective for the fiscal year beginning January 1, 2020. Early adoption is permitted for fiscal years beginning after December 15, 2018. WesBanco is currently evaluating the impact of the adoption of this pronouncement on WesBanco’s Consolidated Financial Statements.

In February 2016, the FASB issued ASU 2016-02 that will require entities to recognize lease assets and lease liabilities on the balance sheet and disclose key information about leasing arrangements. The principal difference from previous guidance is that the lease assets and lease liabilities arising from operating leases were not previously recognized in the balance sheet. Public business entities must apply the new requirements for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. In January 2018, the FASB issued ASU 2018-01, which allows entities the option to apply the provisions of the new lease guidance at the effective date without adjusting the comparative periods presented. While we are currently assessing the impact of the adoption of this pronouncement, we expect the primary impact to our consolidated financial position upon adoption will be the recognition, on a discounted basis, of our minimum commitments under non-cancellable operating leases on our consolidated Balance Sheets resulting in the recording of right of use assets and lease obligations.

In January 2016, the FASB issued ASU 2016-01 that will require entities to measure equity investments that do not result in consolidation and are not accounted for under the equity method at fair value and recognize any changes in fair value in net income unless the investments qualify for the new practicability exception. The standard does not change the guidance for classifying and measuring investments in debt securities and loans. Entities will have to record changes in instrument-specific credit risk for financial liabilities measured under the fair value option in other comprehensive income. Public business entities must apply the new requirements for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. In February 2018, the FASB issued ASU 2018-03, which clarifies certain aspects of the guidance issued in ASU 2016-01. WesBanco adopted these pronouncements as of January 1, 2018 and recognized a $1.1 million adjustment to retained earnings upon adoption of this pronouncement. In addition, WesBanco reclassified investment securities on the Consolidated Financial Statements into the following – equity securities, available-for-sale debt securities and held-to-maturity debt securities.

In May 2014, the FASB issued ASU 2014-09 related to the recognition of revenue from contracts with customers. The new revenue pronouncement creates a single source of revenue guidance for all companies in all industries and is more principles-based than current revenue guidance. The pronouncement provides a five-step model for a company to recognize revenue when it transfers control of goods or services to customers at an amount that reflects the consideration to which it expects to be entitled in exchange for those goods or services. The five steps are, (1) identify the contract with the customer, (2) identify the separate performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price to the separate performance obligations and (5) recognize revenue when each performance obligation is satisfied. On July 9, 2015, the FASB approved a one-year deferral of the effective date of the update. The update is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017. In March 2016, the FASB issued ASU 2016-08, which amends the principle versus agent guidance in the revenue standard. In April 2016, the FASB issued ASU 2016-10, which clarifies when promised goods or services are separately identifiable in the revenue standard. In May 2016, FASB issued ASU 2016-12, which provides narrow-scope improvements and practical expedients to the revenue standard. WesBanco adopted these pronouncements as of January 1, 2018 using the modified retrospective approach. WesBanco noted no material change to the timing of revenue recognition and there was no material impact on WesBanco’s Consolidated Financial Statements. See Note 8, Revenue Recognition for further discussion on revenue within the scope of ASC 606.

8

NOTE 2. EARNINGS PER COMMON SHARE

Earnings per common share are calculated as follows:

	For the Three Months Ended March 31,
(unaudited, in thousands, except shares and per share amounts)	2018		2017
Numerator for both basic and diluted earnings per common share:
Net income	$	33,529	$	25,886
Denominator:
Total average basic common shares outstanding		44,050,701		43,947,563
Effect of dilutive stock options and other stock compensation		117,541		73,202
Total diluted average common shares outstanding		44,168,242		44,020,765
Earnings per common share – basic	$	0.76	$	0.59
Earnings per common share – diluted	$	0.76	$	0.59

All options to purchase shares were included in the diluted shares computation for the three months ended March 31, 2018 and March 31, 2017.

As of March 31, 2018, contingently issuable shares, totaling 39,216, were estimated to be awarded under the 2018, 2017 and 2016 total shareholder return plans as stock performance targets were met and are included in the diluted calculation. As of March 31, 2017, the shares related to the 2017 and 2016 total shareholder return plans were not included in the calculation because the effect would be antidilutive. Performance based restricted stock compensation totaling 9,000 shares were estimated to be awarded as of March 31, 2018 and are included in the diluted calculation. No performance base restricted stock had been granted as of March 31, 2017.

NOTE 3. SECURITIES

The following table presents the fair value and amortized cost of available-for-sale and held-to-maturity debt securities:

	March 31, 2018									December 31, 2017
(unaudited, in thousands)	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 debt securities
U.S. Treasury	$	9,900	$	—	$	(6	)	$	9,894	$	—	$	—	$	—		$	—
U.S. Government sponsored entities and agencies		98,166		1		(1,709	)		96,458		72,425		24		(606	)		71,843
Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies		1,377,904		214		(33,708	)		1,344,410		954,115		214		(19,407	)		934,922
Commerical mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies		144,568		19		(3,661	)		140,926		116,448		4		(1,585	)		114,867
Obligations of states and political subdivisions		100,531		2,093		(1,193	)		101,431		102,363		2,927		(460	)		104,830
Corporate debt securities		35,219		170		(131	)		35,258		35,234		228		(59	)		35,403
Total available-for-sale debt securities	$	1,766,288	$	2,497	$	(40,408	)	$	1,728,377	$	1,280,585	$	3,397	$	(22,117	)	$	1,261,865
Held-to-maturity debt securities
U.S. Government sponsored entities and agencies	$	11,263	$	—	$	(373	)	$	10,890	$	11,465	$	—	$	(325	)	$	11,140
Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies		162,904		301		(4,987	)		158,218		170,025		544		(2,609	)		167,960
Obligations of states and political subdivisions		798,536		10,510		(5,838	)		803,208		794,655		17,364		(1,609	)		810,410
Corporate debt securities		33,339		82		(235	)		33,186		33,355		919		—			34,274
Total held-to-maturity debt securities	$	1,006,042	$	10,893	$	(11,433	)	$	1,005,502	$	1,009,500	$	18,827	$	(4,543	)	$	1,023,784
Total debt securities	$	2,772,330	$	13,390	$	(51,841	)	$	2,733,879	$	2,290,085	$	22,224	$	(26,660	)	$	2,285,649

At March 31, 2018, and December 31, 2017, there were no holdings of any one issuer, other than U.S. government sponsored entities and its agencies, in an amount greater than 10% of WesBanco’s shareholders’ equity.

Equity securities, of which some consist of investments in various mutual funds held in grantor trusts formed in connection with the Company’s deferred compensation plan, are recorded at fair value and totaled $14.0 million and $13.5 million, at March 31, 2018 and December 31, 2017, respectively.

9

The following table presents the fair value of available-for-sale and held-to-maturity debt securities by contractual maturity at March 31, 2018. In some instances, the issuers may have the right to call or prepay obligations without penalty prior to the contractual maturity date.

	March 31, 2018
(unaudited, in thousands)	One Year or less		One to Five Years		Five to Ten Years		After Ten Years		Mortgage-backed securities		Total
Available-for-sale debt securities
U.S. Treasury	$	9,894	$	—	$	—	$	—	$	—	$	9,894
U.S. Government sponsored entities and agencies		9,945		1,961		16,671		6,864		61,017		96,458
Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies (1)		—		—		—		—		1,344,410		1,344,410
Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies (1)		—		—		—		—		140,926		140,926
Obligations of states and political subdivisions		3,686		17,368		40,161		40,216		—		101,431
Corporate debt securities		3,991		26,299		4,968		—		—		35,258
Total available-for-sale debt securities	$	27,516	$	45,628	$	61,800	$	47,080	$	1,546,353	$	1,728,377
Held-to-maturity debt securities (2)
U.S. Government sponsored entities and agencies	$	—	$	—	$	—	$	—	$	10,890	$	10,890
Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies (1)				—		—		—		158,218		158,218
Obligations of states and political subdivisions		6,872		114,768		398,845		282,723		—		803,208
Corporate debt securities		—		7,504		25,682		—		—		33,186
Total held-to-maturity debt securities	$	6,872	$	122,272	$	424,527	$	282,723	$	169,108	$	1,005,502
Total debt securities	$	34,388	$	167,900	$	486,327	$	329,803	$	1,715,461	$	2,733,879

⁽¹⁾ Mortgage-backed and collateralized mortgage securities, which have prepayment provisions, are not assigned to maturity categories due to fluctuations in their prepayment speeds.

⁽²⁾  The held-to-maturity debt securities portfolio is carried at an amortized cost of $1.0 billion.

Securities with aggregate fair values of $1.5 billion and $1.4 billion at March 31, 2018 and December 31, 2017, respectively, were pledged as security for public and trust funds, and securities sold under agreements to repurchase. There were no sales of available-for-sale debt securities for the three months ended March 31, 2018 and 2017, respectively. Net unrealized losses on available-for-sale debt securities included in accumulated other comprehensive income net of tax, as of March 31, 2018 and December 31, 2017 were $29.2 million and $13.3 million, respectively.

The following table presents the gross realized gains and losses on sales and calls of available-for-sale and held-to-maturity debt securities, as well as gains and losses on equity securities for the three months ended March 31, 2018 and 2017, respectively.

	For the Three Months Ended March 31,
(unaudited, in thousands)	2018			2017
Debt securities:
Gross realized gains	$	7		$	12
Gross realized losses		(18	)		—
Net (losses) gains on debt securities	$	(11	)	$	12
Equity securities:
Unrealized (losses) gains recognized on securities still held	$	(28	)	$	—
Net realized (losses) gains recognized on securities sold		—			—
Net (losses) gains on equity securities	$	(28	)	$	—
Net securities (losses) gains	$	(39	)	$	12

10

The following tables provide information on unrealized losses on debt securities that have been in an unrealized loss position for less than twelve months and twelve months or more as of March 31, 2018 and December 31, 2017:

	March 31, 2018
	Less than 12 months							12 months or more							Total
	Fair		Unrealized			# of		Fair		Unrealized			# of		Fair		Unrealized			# of
(unaudited, dollars in thousands)	Value		Losses			Securities		Value		Losses			Securities		Value		Losses			Securities
U.S. Treasury	$	9,894	$	(6	)		1	$	—	$	—			—	$	9,894	$	(6	)		1
U.S. Government sponsored entities and agencies		59,280		(1,129	)		8		41,203		(953	)		8		100,483		(2,082	)		16
Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies		785,806		(13,021	)		128		602,202		(25,674	)		195		1,388,008		(38,695	)		323
Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies		101,309		(2,780	)		12		23,376		(881	)		4		124,685		(3,661	)		16
Obligations of states and political subdivisions		335,762		(4,776	)		527		72,751		(2,255	)		152		408,513		(7,031	)		679
Corporate debt securities		35,405		(352	)		12		1,974		(14	)		1		37,379		(366	)		13
Total temporarily impaired securities	$	1,327,456	$	(22,064	)		688	$	741,506	$	(29,777	)		360	$	2,068,962	$	(51,841	)		1,048
	December 31, 2017
	Less than 12 months							12 months or more							Total
	Fair		Unrealized			# of		Fair		Unrealized			# of		Fair		Unrealized			# of
(unaudited, dollars in thousands)	Value		Losses			Securities		Value		Losses			Securities		Value		Losses			Securities
U.S. Government sponsored entities and agencies	$	24,776	$	(160	)		4	$	42,248	$	(771	)		8	$	67,024	$	(931	)		12
Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies		423,794		(5,039	)		87		637,461		(16,977	)		193		1,061,255		(22,016	)		280
Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies		79,061		(1,089	)		10		27,852		(496	)		6		106,913		(1,585	)		16
Obligations of states and political subdivisions		132,831		(852	)		210		77,554		(1,217	)		160		210,385		(2,069	)		370
Corporate debt securities		4,015		(19	)		1		1,948		(40	)		1		5,963		(59	)		2
Total temporarily impaired securities	$	664,477	$	(7,159	)		312	$	787,063	$	(19,501	)		368	$	1,451,540	$	(26,660	)		680

Unrealized losses on debt securities in the tables represent temporary fluctuations resulting from changes in market rates in relation to fixed yields. Unrealized losses in the available-for-sale portfolio are accounted for as an adjustment, net of taxes, to other comprehensive income in shareholders’ equity.

WesBanco does not believe the securities presented above are impaired due to reasons of credit quality, as substantially all debt securities are rated above investment grade and all are paying principal and interest according to their contractual terms. WesBanco does not intend to sell, nor is it more likely than not that it will be required to sell, loss position securities prior to recovery of their cost, and therefore, management believes the unrealized losses detailed above are temporary and no impairment loss relating to these securities has been recognized.

Securities that do not have readily determinable fair values and for which WesBanco does not exercise significant influence are carried at cost. Cost method investments consist primarily of FHLB of Pittsburgh, Cincinnati and Indianapolis stock totaling $55.6 million and $45.9 million at March 31, 2018 and December 31, 2017, respectively, and are included in other assets in the Consolidated Balance Sheets. Cost method investments are evaluated for impairment whenever events or circumstances suggest that their carrying value may not be recoverable.

11

NOTE 4. LOANS AND THE ALLOWANCE FOR CREDIT LOSSES

The recorded investment in loans is presented in the Consolidated Balance Sheets net of deferred loan fees and costs, and discounts on purchased loans. The net deferred loan costs were $1.9 million and $1.6 million at March 31, 2018 and December 31, 2017, respectively. The unamortized discount on purchased loans from acquisitions was $20.8 million, including $10.0 million related to YCB, and $21.9 million at March 31, 2018 and December 31, 2017, respectively.

(unaudited, in thousands)	March 31, 2018		December 31, 2017
Commercial real estate:
Land and construction	$	440,896	$	392,597
Improved property		2,574,330		2,601,851
Total commercial real estate		3,015,226		2,994,448
Commercial and industrial		1,118,333		1,125,327
Residential real estate		1,345,993		1,353,301
Home equity		523,425		529,196
Consumer		319,561		339,169
Total portfolio loans		6,322,538		6,341,441
Loans held for sale		12,962		20,320
Total loans	$	6,335,500	$	6,361,761

The following tables summarize changes in the allowance for credit losses applicable to each category of the loan portfolio:

	Allowance for Credit Losses By Category
	For the Three Months Ended March 31, 2018 and 2017
	Commercial			Commercial
	Real Estate-			Real Estate-
	Land and			Improved			Commercial			Residential			Home						Deposit
(unaudited, in thousands)	Construction			Property			& Industrial			Real Estate			Equity			Consumer			Overdraft			Total
Balance at December 31, 2017:
Allowance for loan losses	$	3,117		$	21,166		$	9,414		$	3,206		$	4,497		$	3,063		$	821		$	45,284
Allowance for loan commitments		119			26			173			7			212			37			—			574
Total beginning allowance for credit losses		3,236			21,192			9,587			3,213			4,709			3,100			821			45,858
Provision for credit losses:
Provision for loan losses		1,090			(895	)		919			202			262			583			(48	)		2,113
Provision for loan commitments		57			(5	)		3			—			(4	)		4			—			55
Total provision for credit losses		1,147			(900	)		922			202			258			587			(48	)		2,168
Charge-offs		—			(279	)		(109	)		(287	)		(576	)		(1,125	)		(267	)		(2,643	)
Recoveries		117			287			270			131			120			546			109			1,580
Net charge-offs		117			8			161			(156	)		(456	)		(579	)		(158	)		(1,063	)
Balance at March 31, 2018:
Allowance for loan losses		4,324			20,279			10,494			3,252			4,303			3,067			615			46,334
Allowance for loan commitments		176			21			176			7			208			41			—			629
Total ending allowance for credit losses	$	4,500		$	20,300		$	10,670		$	3,259		$	4,511		$	3,108		$	615		$	46,963
Balance at December 31, 2016:
Allowance for loan losses	$	4,348		$	18,628		$	8,412		$	4,106		$	3,422		$	3,998		$	760		$	43,674
Allowance for loan commitments		151			17			188			9			162			44			—			571
Total beginning allowance for credit losses		4,499			18,645			8,600			4,115			3,584			4,042			760			44,245
Provision for credit losses:
Provision for loan losses		(425	)		983			832			330			365			583			66			2,734
Provision for loan commitments		(8	)		—			(31	)		1			17			(2	)		—			(23	)
Total provision for credit losses		(433	)		983			801			331			382			581			66			2,711
Charge-offs		—			(602	)		(880	)		(404	)		(108	)		(1,287	)		(338	)		(3,619	)
Recoveries		52			251			376			78			48			369			98			1,272
Net charge-offs		52			(351	)		(504	)		(326	)		(60	)		(918	)		(240	)		(2,347	)
Balance at March 31, 2017:
Allowance for loan losses		3,975			19,260			8,740			4,110			3,727			3,663			586			44,061
Allowance for loan commitments		143			17			157			10			179			42			—			548
Total ending allowance for credit losses	$	4,118		$	19,277		$	8,897		$	4,120		$	3,906		$	3,705		$	586		$	44,609

12

The following tables present the allowance for credit losses and recorded investments in loans by category:

	Allowance for Credit Losses and Recorded Investment in Loans
	Commercial		Commercial
	Real Estate-		Real Estate-		Commercial		Residential						Deposit
	Land and		Improved		and		Real		Home				Over-
(unaudited, in thousands)	Construction		Property		Industrial		Estate		Equity		Consumer		draft		Total
March 31, 2018
Allowance for credit losses:
Allowance for loans individually evaluated for impairment	$	—	$	387	$	—	$	—	$	—	$	—	$	—	$	387
Allowance for loans collectively evaluated for impairment		4,324		19,892		10,494		3,252		4,303		3,067		615		45,947
Allowance for loan commitments		176		21		176		7		208		41		—		629
Total allowance for credit losses	$	4,500	$	20,300	$	10,670	$	3,259	$	4,511	$	3,108	$	615	$	46,963
Portfolio loans:
Individually evaluated for impairment (1)	$	—	$	2,104	$	—	$	—	$	—	$	—	$	—	$	2,104
Collectively evaluated for impairment		439,480		2,567,367		1,117,607		1,345,290		523,425		319,561		—		6,312,730
Acquired with deteriorated credit quality		1,416		4,859		726		703		—		—		—		7,704
Total portfolio loans	$	440,896	$	2,574,330	$	1,118,333	$	1,345,993	$	523,425	$	319,561	$	—	$	6,322,538
December 31, 2017
Allowance for credit losses:
Allowance for loans individually evaluated for impairment	$	—	$	388	$	—	$	—	$	—	$	—	$	—	$	388
Allowance for loans collectively evaluated for impairment		3,117		20,778		9,414		3,206		4,497		3,063		821		44,896
Allowance for loan commitments		119		26		173		7		212		37		—		574
Total allowance for credit losses	$	3,236	$	21,192	$	9,587	$	3,213	$	4,709	$	3,100	$	821	$	45,858
Portfolio loans:
Individually evaluated for impairment (1)	$	—	$	3,344	$	—	$	—	$	—	$	—	$	—	$	3,344
Collectively evaluated for impairment		391,140		2,593,393		1,124,544		1,352,587		529,196		339,163		—		6,330,023
Acquired with deteriorated credit quality		1,457		5,114		783		714		—		6		—		8,074
Total portfolio loans	$	392,597	$	2,601,851	$	1,125,327	$	1,353,301	$	529,196	$	339,169	$	—	$	6,341,441

⁽¹⁾  Commercial loans greater than $1 million that are reported as non-accrual or as a TDR are individually evaluated for impairment.

WesBanco maintains an internal loan grading system to reflect the credit quality of commercial loans. Commercial loan risk grades are determined based on an evaluation of the relevant characteristics of each loan, assigned at the inception of each loan and adjusted thereafter at any time to reflect changes in the risk profile throughout the life of each loan. The primary factors used to determine the risk grade are the reliability and sustainability of the primary source of repayment and overall financial strength of the borrower. This includes an analysis of cash flow available to repay debt, profitability, liquidity, leverage, and overall financial trends. Other factors include management, industry or property type risks, an assessment of secondary sources of repayment such as collateral or guarantees, other terms and conditions of the loan that may increase or reduce its risk, and economic conditions and other external factors that may influence repayment capacity and financial condition.

Commercial real estate – land and construction consists of loans to finance investments in vacant land, land development, construction of residential housing, and construction of commercial buildings. Commercial real estate – improved property consists of loans for the purchase or refinance of all types of improved owner-occupied and investment properties. Factors that are considered in assigning the risk grade vary depending on the type of property financed. The risk grade assigned to construction and development loans is based on the overall viability of the project, the experience and financial capacity of the developer or builder to successfully complete the project, project specific and market absorption rates and comparable property values, and the amount of pre-sales for residential housing construction or pre-leases for commercial investment property. The risk grade assigned to commercial investment property loans is based primarily on the adequacy of net rental income generated by the property to service the debt, the type, quality, industry and mix of tenants, and the terms of leases, but also considers the overall financial capacity of the investors and their experience in owning and managing investment property. The risk grade assigned to owner-occupied commercial real estate and commercial and industrial loans is based primarily on historical and projected earnings, the adequacy of operating cash flow to service all of the business’ debt, and the capital resources, liquidity and leverage of the business, but also considers the industry in which the business operates, the business’ specific competitive advantages or disadvantages, the quality and experience of management, and external influences on the business such as economic conditions.

Commercial and industrial loans consist of revolving lines of credit to finance accounts receivable, inventory and other general business purposes; term loans to finance fixed assets other than real estate, and letters of credit to support trade, insurance or governmental requirements for a variety of businesses. Most C&I borrowers are privately-held companies with annual sales up to $100 million. Factors that are considered for commercial and industrial loans include the type, quality and marketability of non-real estate collateral and whether the structure of the loan increases or reduces its risk. The type, age, condition, location and any environmental risks associated with a property are also considered for all types of commercial real estate. The overall financial condition and repayment capacity of any guarantors is also evaluated to determine the extent to which they mitigate other risks of the loan. The following paragraphs provide descriptions of risk grades that are applicable to commercial real estate and commercial and industrial loans.

Pass loans are those that exhibit a history of positive financial results that are at least comparable to the average for their industry or type of real estate. The primary source of repayment is acceptable and these loans are expected to perform satisfactorily during most economic cycles. Pass loans typically have no significant external factors that are expected to adversely affect these borrowers more than others in the same industry or property type. Any minor unfavorable characteristics of these loans are outweighed or mitigated by other positive factors including but not limited to adequate secondary or tertiary sources of repayment.

13

Criticized or compromised loans are currently protected but have weaknesses, which, if not corrected, may be inadequately protected at some future date. These loans represent an unwarranted credit risk and would generally not be extended in the normal course of lending. Specific issues which may warrant this grade include declining financial results, increased reliance on secondary sources of repayment or guarantor support and adverse external influences that may negatively impact the business or property.

Substandard and doubtful loans are equivalent to the classifications used by banking regulators. Substandard loans are inadequately protected by the current repayment capacity and equity of the borrower or collateral pledged, if any. Substandard loans have one or more well-defined weaknesses that jeopardize their repayment or collection in full. These loans may or may not be reported as non-accrual. Doubtful loans have all the weaknesses inherent to a substandard loan with the added characteristic that full repayment is highly questionable or improbable on the basis of currently existing facts, conditions and collateral values. However, recognition of loss may be deferred if there are reasonably specific pending factors that will reduce the risk if they occur.

The following tables summarize commercial loans by their assigned risk grade:

	Commerical Loans by Internally Assigned Risk Grade
(unaudited, in thousands)	Commercial Real Estate- Land and Construction		Commercial Real Estate- Improved Property		Commercial & Industrial		Total Commercial Loans
As of March 31, 2018
Pass	$	434,665	$	2,526,334	$	1,104,209	$	4,065,208
Criticized - compromised		3,384		24,807		5,594		33,785
Classified - substandard		2,847		23,189		8,530		34,566
Classified - doubtful		—		—		—		—
Total	$	440,896	$	2,574,330	$	1,118,333	$	4,133,559
As of December 31, 2017
Pass	$	386,753	$	2,548,805	$	1,110,267	$	4,045,825
Criticized - compromised		2,984		25,673		7,435		36,092
Classified - substandard		2,860		27,373		7,625		37,858
Classified - doubtful		—		—		—		—
Total	$	392,597	$	2,601,851	$	1,125,327	$	4,119,775

Residential real estate, home equity and consumer loans are not assigned internal risk grades other than as required by regulatory guidelines that are based primarily on the age of past due loans. WesBanco primarily evaluates the credit quality of residential real estate, home equity and consumer loans based on repayment performance and historical loss rates. The aggregate amount of residential real estate, home equity and consumer loans classified as substandard in accordance with regulatory guidelines was $19.4 million at March 31, 2018 and $22.8 million at December 31, 2017, of which $1.0 and $2.5 million were accruing, for each period, respectively. The aggregate amount of residential real estate, home equity and consumer loans classified as substandard are not included in the tables above.

Acquired YCB Loans — The carrying amount of loans acquired from YCB with deteriorated credit quality at March 31, 2018 and December 31, 2017 was $4.2 million and $4.3 million, respectively, of which $0.7 million and $0.8 million, respectively, were accounted for under the cost recovery method in accordance with ASC 310-30 as cash flows cannot be reasonably estimated, and therefore are categorized as non-accrual. At March 31, 2018, the accretable yield was $1.3 million. At March 31, 2018 and December 31, 2017, an allowance for loan loss of $0.2 million and $0, respectively, has been recognized related to the YCB acquired impaired loans, as the estimates for future cash flows on these loans have been negatively impacted.

Acquired ESB Loans — The carrying amount of loans acquired from ESB with deteriorated credit quality at March 31, 2018 and December 31, 2017 was $3.5 million and $3.7 million, respectively, of which $3.5 million for both periods was accounted for under the cost recovery method in accordance with ASC 310-30 as cash flows cannot be reasonably estimated, and therefore were categorized as non-accrual. At March 31, 2018, the accretable yield was $2.9 million. At March 31, 2018 and December 31, 2017 an allowance for loan loss of $2.0 million has been recognized related to the ESB acquired impaired loans, as the estimates for future cash flows on these loans have been negatively impacted.

14

The following table provides changes in accretable yield for loans acquired with deteriorated credit quality:

	For the Three Months Ended
(unaudited, in thousands)	March 31, 2018			March 31, 2017
Balance at beginning of period	$	1,724		$	1,717
Acquisitions		—			—
Reduction due to change in projected cash flows		(86	)		(200	)
Reclass from non-accretable difference		2,841			174
Transfers out		—			—
Accretion		(268	)		(151	)
Balance at end of period	$	4,211		$	1,540

The following tables summarize the age analysis of all categories of loans:

	Age Analysis of Loans
(unaudited, in thousands)	Current		30-59 Days Past Due		60-89 Days Past Due		90 Days or More Past Due		Total Past Due		Total Loans		90 Days or More Past Due and Accruing (1)
As of March 31, 2018
Commercial real estate:
Land and construction	$	439,926	$	—	$	—	$	970	$	970	$	440,896	$	172
Improved property		2,559,491		4,431		528		9,880		14,839		2,574,330		364
Total commercial real estate		2,999,417		4,431		528		10,850		15,809		3,015,226		536
Commercial and industrial		1,115,453		667		201		2,012		2,880		1,118,333		21
Residential real estate		1,333,175		3,860		1,618		7,340		12,818		1,345,993		561
Home equity		517,172		2,654		682		2,917		6,253		523,425		251
Consumer		316,517		1,950		432		662		3,044		319,561		210
Total portfolio loans		6,281,734		13,562		3,461		23,781		40,804		6,322,538		1,579
Loans held for sale		12,962		—		—		—		—		12,962		—
Total loans	$	6,294,696	$	13,562	$	3,461	$	23,781	$	40,804	$	6,335,500	$	1,579
Impaired loans included above are as follows:
Non-accrual loans	$	8,120	$	1,310	$	754	$	22,202	$	24,266	$	32,386
TDRs accruing interest (1)		6,435		230		193		—		423		6,858
Total impaired	$	14,555	$	1,540	$	947	$	22,202	$	24,689	$	39,244
As of December 31, 2017
Commercial real estate:
Land and construction	$	392,189	$	—	$	172	$	236	$	408	$	392,597	$	—
Improved property		2,589,704		374		1,200		10,573		12,147		2,601,851		243
Total commercial real estate		2,981,893		374		1,372		10,809		12,555		2,994,448		243
Commercial and industrial		1,121,957		572		196		2,602		3,370		1,125,327		20
Residential real estate		1,338,240		4,487		2,376		8,198		15,061		1,353,301		1,113
Home equity		522,584		2,135		683		3,794		6,612		529,196		742
Consumer		334,723		2,466		842		1,138		4,446		339,169		608
Total portfolio loans		6,299,397		10,034		5,469		26,541		42,044		6,341,441		2,726
Loans held for sale		20,320		—		—		—		—		20,320		—
Total loans	$	6,319,717	$	10,034	$	5,469	$	26,541	$	42,044	$	6,361,761	$	2,726
Impaired loans included above are as follows:
Non-accrual loans	$	9,195	$	1,782	$	2,033	$	23,815	$	27,630	$	36,825
TDRs accruing interest (1)		6,055		348		168		—		516		6,571
Total impaired	$	15,250	$	2,130	$	2,201	$	23,815	$	28,146	$	43,396

⁽¹⁾ Loans 90 days or more past due and accruing interest exclude TDRs 90 days or more past due and accruing interest.

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The following tables summarize impaired loans:

	Impaired Loans
	March 31, 2018						December 31, 2017
	Unpaid Principal Balance (1)		Recorded Investment		Related Allowance		Unpaid Principal Balance (1)		Recorded Investment		Related Allowance
(unaudited, in thousands)
With no related specific allowance recorded:
Commercial real estate:
Land and construction	$	873	$	800	$	—	$	412	$	239	$	—
Improved property		14,554		10,319		—		18,229		12,863		—
Commercial and industrial		3,045		2,496		—		3,745		3,086		—
Residential real estate		19,601		17,751		—		20,821		18,982		—
Home equity		5,771		4,971		—		5,833		5,169		—
Consumer		918		803		—		1,084		952		—
Total impaired loans without a specific allowance		44,762		37,140		—		50,124		41,291		—
With a specific allowance recorded:
Commercial real estate:
Land and construction		—		—		—		—		—		—
Improved property		2,104		2,104		387		2,105		2,105		388
Commercial and industrial		—		—		—		—		—		—
Total impaired loans with a specific allowance		2,104		2,104		387		2,105		2,105		388
Total impaired loans	$	46,866	$	39,244	$	387	$	52,229	$	43,396	$	388

⁽¹⁾ The difference between the unpaid principal balance and the recorded investment generally reflects amounts that have been previously charged-off and fair market value adjustments on acquired impaired loans.

	Impaired Loans
	For the Three Months Ended March 31, 2018				For the Three Months Ended March 31, 2017
	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
(unaudited, in thousands)
With no related specific allowance recorded:
Commercial real estate:
Land and construction	$	520	$	—	$	588	$	—
Improved property		11,591		345		9,620		346
Commercial and industrial		2,791		2		3,812		2
Residential real estate		18,367		66		18,448		69
Home equity		5,070		5		4,186		5
Consumer		878		3		761		2
Total impaired loans without a specific allowance		39,217		421		37,415		424
With a specific allowance recorded:
Commercial real estate:
Land and construction		—		—		—		—
Improved property		2,105		—		4,927		—
Commercial and industrial		—		—		635		—
Total impaired loans with a specific allowance		2,105		—		5,562		—
Total impaired loans	$	41,322	$	421	$	42,977	$	424

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The following tables present the recorded investment in non-accrual loans and TDRs:

	Non-accrual Loans (1)
(unaudited, in thousands)	March 31, 2018		December 31, 2017
Commercial real estate:
Land and construction	$	800	$	239
Improved property		10,821		13,318
Total commercial real estate		11,621		13,557
Commercial and industrial		2,373		2,958
Residential real estate		13,149		14,661
Home equity		4,540		4,762
Consumer		703		887
Total	$	32,386	$	36,825

⁽¹⁾  At March 31, 2018, there were 2 borrowers with loans greater than $1.0 million totaling $5.6 million, as compared to three borrowers with loans greater than $1.0 million totaling $6.8 million at December 31, 2017. Total non-accrual loans include loans that are also restructured. Such loans are also set forth in the following table as non-accrual TDRs.

	TDRs
	March 31, 2018						December 31, 2017
(unaudited, in thousands)	Accruing		Non-Accrual		Total		Accruing		Non-Accrual		Total
Commercial real estate:
Land and construction	$	—	$	2	$	2	$	—	$	3	$	3
Improved property		1,602		490		2,092		1,650		428		2,078
Total commercial real estate		1,602		492		2,094		1,650		431		2,081
Commercial and industrial		123		94		217		128		97		225
Residential real estate		4,602		1,525		6,127		4,321		1,880		6,201
Home equity		431		220		651		407		337		744
Consumer		100		66		166		65		120		185
Total	$	6,858	$	2,397	$	9,255	$	6,571	$	2,865	$	9,436

As of March 31, 2018 and December 31, 2017 there were no TDRs greater than $1.0 million. The concessions granted in the majority of loans reported as accruing and non-accrual TDRs are extensions of the maturity date or the amortization period, reductions in the interest rate below the prevailing market rate for loans with comparable characteristics, and/or permitting interest-only payments for longer than three months. WesBanco had unfunded commitments to debtors whose loans were classified as impaired of $0.1 million as of March 31, 2018 and December 31, 2017.

The following tables present details related to loans identified as TDRs during the three months ended March 31, 2018 and 2017, respectively:

	New TDRs (1) For the Three Months Ended
	March 31, 2018						March 31, 2017
			Pre-		Post-				Pre-		Post-
			Modification		Modification				Modification		Modification
			Outstanding		Outstanding				Outstanding		Outstanding
	Number of		Recorded		Recorded		Number of		Recorded		Recorded
(unaudited, dollars in thousands)	Modifications		Investment		Investment		Modifications		Investment		Investment
Commercial real estate:
Land and construction		—	$	—	$	—		—	$	—	$	—
Improved Property		—		—		—		—		—		—
Total commercial real estate		—		—		—		—		—		—
Commercial and industrial		—		—		—		2		126		122
Residential real estate		5		203		195		1		10		9
Home equity		—		—		—		1		44		43
Consumer		2		4		3		2		84		21
Total		7	$	207	$	198		6	$	264	$	195

⁽¹⁾  Excludes loans that were either paid off or charged-off by period end. The pre-modification balance represents the balance outstanding at the beginning of the period. The post-modification balance represents the outstanding balance at period end.

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The following table summarizes TDRs which defaulted (defined as past due 90 days) during the three months ended March 31, 2018 and 2017, respectively, that were restructured within the last twelve months prior to March 31, 2018 and 2017, respectively:

	Defaulted TDRs (1)				Defaulted TDRs (1)
	For the Three Months Ended				For the Three Months Ended
	March 31, 2018				March 31, 2017
(unaudited, dollars in thousands)	Number of Defaults		Recorded Investment		Number of Defaults		Recorded Investment
Commercial real estate:
Land and construction		—	$	—		—	$	—
Improved property		—		—		—		—
Total commercial real estate		—		—		—		—
Commercial and industrial		—		—		—		—
Residential real estate		1		122		—		—
Home equity		1		7		—		—
Consumer		—		—		1		9
Total		2	$	129		1	$	9

⁽¹⁾ Excludes loans that were either charged-off or cured by period end. The recorded investment is as of March 31, 2018 and 2017, respectively.

TDRs that default are placed on non-accrual status unless they are both well-secured and in the process of collection. The loans in the table above were not accruing interest.

The following table summarizes other real estate owned and repossessed assets included in other assets:

(unaudited, in thousands)	March 31, 2018		December 31, 2017
Other real estate owned	$	3,991	$	5,195
Repossessed assets		76		102
Total other real estate owned and repossessed assets	$	4,067	$	5,297

Residential real estate included in other real estate owned at March 31, 2018 and December 31, 2017 was $0.9 million and $1.5 million, respectively. At March 31, 2018 and December 31, 2017, formal foreclosure proceedings were in process on residential real estate loans totaling $4.3 million and $3.5 million, respectively.

NOTE 5. DERIVATIVES AND HEDGING ACTIVITIES

Risk Management Objective of Using Derivatives

WesBanco is exposed to certain risks arising from both its business operations and economic conditions. WesBanco principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. WesBanco manages economic risks, including interest rate, liquidity, and credit risk, primarily by managing the amount, sources, and duration of its assets and liabilities. WesBanco’s existing interest rate derivatives result from a service provided to certain qualifying customers and, therefore, are not used to manage interest rate risk in WesBanco’s assets or liabilities. WesBanco manages a matched book with respect to its derivative instruments in order to minimize its net risk exposure resulting from such transactions. A matched book is when the Bank’s assets and liabilities are equally distributed but also have similar maturities.

Loan Swaps

WesBanco executes interest rate swaps with commercial banking customers to facilitate their respective risk management strategies. Those interest rate swaps are simultaneously hedged by offsetting interest rate swaps that WesBanco executes with a third party, such that WesBanco minimizes its net risk exposure resulting from such transactions. As the interest rate swaps associated with this program do not meet the strict hedge accounting requirements of FASB ASC 815, changes in the fair value of both the customer swaps and the offsetting third-party swaps are recognized directly in earnings. As of March 31, 2018 and December 31, 2017, WesBanco had 43 and 39, respectively, interest rate swaps with an aggregate notional amount of $309.2 million and $298.2 million, respectively, related to this program. During the three months ended March 31, 2018 and 2017, WesBanco recognized net gains (net losses) of $0.2 million and $(0.2) million, respectively, related to the changes in fair value of these swaps. Additionally, WesBanco recognized $0.4 million and $1.0 million of income for the related swap fees for the three months ended March 31, 2018 and 2017, respectively.

Mortgage Loans Held for Sale and Loan Commitments

Certain residential mortgage loans are originated for sale in the secondary mortgage loan market. These loans are classified as held for sale and carried at fair value as WesBanco has elected the fair value option. Fair value is determined based on rates obtained from the secondary market for loans with similar characteristics. WesBanco sells loans to the secondary market on a mandatory or best efforts basis. The loans sold on a mandatory basis are not committed to an investor until the loan is closed with the borrower. WesBanco enters into forward TBA contracts to manage the interest rate risk between the loan commitment and the closing of the loan. The loans sold on a best efforts basis are committed to an investor simultaneous to the interest rate commitment with the borrower.

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Fair Values of Derivative Instruments on the Balance Sheet

All derivatives are carried on the consolidated balance sheet at fair value. Derivative assets are classified in the consolidated balance sheet under other assets, and derivative liabilities are classified in the consolidated balance sheet under other liabilities. Changes in fair value are recognized in earnings. None of WesBanco’s derivatives are designated in qualifying hedging relationships under ASC 815.

The table below presents the fair value of WesBanco’s derivative financial instruments as well as their classification on the Balance Sheet as of March 31, 2018 and December 31, 2017:

	March 31, 2018						December 31, 2017
(unaudited, in thousands)	Notional or Contractual Amount		Asset Derivatives		Liability Derivatives		Notional or Contractual Amount		Asset Derivatives		Liability Derivatives
Derivatives
Loan Swaps:
Interest rate swaps	$	309,242	$	9,257	$	9,083	$	298,223	$	7,351	$	7,345
Other contracts:
Interest rate loan commitments		24,730		147		—		20,319		49		—
Best efforts forward delivery commitments		3,941		—		11		2,905		—		6
Forward TBA contracts		36,500		—		3		31,750		—		23
Total derivatives			$	9,404	$	9,097			$	7,400	$	7,374

Effect of Derivative Instruments on the Income Statement

The table below presents the change in the fair value of the Company’s derivative financial instruments reflected within the other non-interest income line item of the consolidated income statement for the three months ended March 31, 2018 and 2017, respectively.

		For the Three Months Ended
	Location of Gain/(Loss)	March 31,
(unaudited, in thousands)		2018			2017
Interest rate swaps	Other income	$	(167	)	$	195
Interest rate loan commitments	Mortgage banking income		98			—
Best efforts forward sales contracts	Mortgage banking income		(5	)		—
Forward TBA contracts	Mortgage banking income		410			—
Total		$	336		$	195

Credit-risk-related Contingent Features

WesBanco has agreements with its derivative counterparties that contain a provision where if WesBanco defaults on any of its indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then WesBanco could also be declared in default on its derivative obligations.

WesBanco also has agreements with certain of its derivative counterparties that contain a provision where if WesBanco fails to maintain its status as either a well or adequately capitalized institution, then the counterparty could terminate the derivative positions and WesBanco would be required to settle its obligations under the agreements.

WesBanco has minimum collateral posting thresholds with certain of its derivative counterparties and has posted collateral with a market value of $2.9 million as of March 31, 2018. If WesBanco had breached any of these provisions at March 31, 2018, it could have been required to settle its obligations under the agreements at the termination value and would have been required to pay any additional amounts due in excess of amounts previously posted as collateral with the respective counterparty.

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NOTE 6. PENSION PLAN

The following table presents the net periodic pension cost for WesBanco’s Defined Benefit Pension Plan (the “Plan”) and the related components:

	For the Three Months Ended March 31,
(unaudited, in thousands)	2018			2017
Service cost – benefits earned during year	$	699		$	636
Interest cost on projected benefit obligation		1,114			1,084
Expected return on plan assets		(2,204	)		(1,886	)
Amortization of prior service cost		6			6
Amortization of net loss		753			794
Net periodic pension cost	$	368		$	634

The Plan covers all employees of WesBanco and its subsidiaries who were hired on or before August 1, 2007 who satisfy minimum age and length of service requirements, and is not available to employees hired after such date.

A minimum required contribution of $5.1 million is due for 2018, which could be all or partially offset by the Plan’s $56.9 million available credit balance. WesBanco currently expects to make a voluntary contribution of $5.0 million to the Plan in 2018.

WesBanco assumed YCB’s obligation for a predecessor bank’s participation in the Pentegra Defined Benefit Plan for Financial Institutions (“Pentegra Plan”). The participating employer plan has been frozen to new participants since 2002. WesBanco spun off the assets from the Pentegra Plan, contributing approximately $2.8 million to satisfy the estimated final costs to do so. This spin off had no impact on earnings as the liability was included in YCB’s balance sheet as of the acquisition date. The distributed assets from the Pentegra Plan were transferred to a plan providing substantially the same benefits to the participants. The net periodic pension income for this plan for the three months ended March 31, 2018 was $62 thousand, which was comprised of a $0.2 million expected return on plan assets and a $3 thousand recognized net actuarial gain partially offset by a $0.1 million interest cost on projected benefit obligation.

No minimum contribution is due for this plan for fiscal year 2018; however, WesBanco expects to make a voluntary contribution of $0.2 million.

NOTE 7. FAIR VALUE MEASUREMENT

Fair value estimates are based on quoted market prices, if available, quoted market prices of similar assets or liabilities, or the present value of expected future cash flows and other valuation techniques. These valuations are significantly affected by discount rates, cash flow assumptions, and risk assumptions used. Therefore, fair value estimates may not be substantiated by comparison to independent markets and are not intended to reflect the proceeds that may be realizable in an immediate settlement of the instruments.

Fair value is determined at one point in time and is not representative of future value. These amounts do not reflect the total value of a going concern organization. Management does not have the intention to dispose of a significant portion of its assets and liabilities, and therefore the unrealized gains or losses should not be interpreted as a forecast of future earnings and cash flows.

The following is a discussion of assets and liabilities measured at fair value on a recurring basis and valuation techniques applied:

Investment securities: The fair value of investment securities which are measured on a recurring basis are determined primarily by obtaining quoted prices on nationally recognized securities exchanges or matrix pricing, which is a mathematical technique used widely in the industry to value debt securities without relying exclusively on quoted prices for the specific securities but rather by relying on the securities’ relationship to other similar securities. These securities are classified within level 1 or 2 in the fair value hierarchy. Positions that are not traded in active markets for which valuations are generated using assumptions not observable in the market or management’s best estimate are classified within level 3 of the fair value hierarchy. This includes certain specific municipal debt issues for which the credit quality and discount rate must be estimated.

Derivatives: WesBanco enters into interest rate swap agreements with qualifying commercial customers to meet their financing, interest rate and other risk management needs. These agreements provide the customer the ability to convert from variable to fixed interest rates. The credit risk associated with derivatives executed with customers is essentially the same as that involved in extending loans and is subject to normal credit policies and monitoring. Those interest rate swaps are economically hedged by offsetting interest rate swaps that WesBanco executes with derivative counterparties in order to offset its exposure on the fixed components of the customer interest rate swap agreements. The interest rate swap agreement with the loan customer and with the counterparty is reported at fair value in other assets and other liabilities on the consolidated balance sheet with any resulting gain or loss recorded in current period earnings as other income and other expense.

WesBanco enters into forward TBA contracts to manage the interest rate risk between the loan commitments to the customer and the closing of the loan for loans that will be sold on a mandatory basis to secondary market investors. The forward TBA contract is reported at fair value in other assets and other liabilities on the consolidated balance sheet with any resulting gain or loss recorded in current period’s earnings as mortgage banking income.

WesBanco determines the fair value for derivatives using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects contractual terms of the derivative, including the period to maturity, and uses

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observable market-based inputs, including interest rate curves and implied volatilities. WesBanco incorporates credit valuation adjustments to appropriately reflect both its own non-performance risk and the respective counterparty’s non-performance risk in the fair value measurements.

We may be required from time to time to measure certain assets and liabilities at fair value on a nonrecurring basis in accordance with GAAP. These adjustments to fair value usually result from the application of lower of cost or market accounting or write-downs of individual assets and liabilities.

Impaired loans: Impaired loans are carried at the lower of cost or the fair value of the collateral for collateral-dependent loans. Collateral may be in the form of real estate or business assets including equipment, inventory and accounts receivable. The use of independent appraisals, discounted cash flow models and management’s best judgment are significant inputs in arriving at the fair value measure of the underlying collateral and impaired loans are therefore classified within level 3 of the fair value hierarchy.

Other real estate owned and repossessed assets: Other real estate owned and repossessed assets are carried at the lower of the investment in the assets or the fair value of the assets less estimated selling costs. The use of independent appraisals and management’s best judgment are significant inputs in arriving at the fair value measure of the underlying collateral, and therefore other real estate owned and repossessed assets are classified within level 3 of the fair value hierarchy.

Loans held for sale: Loans held for sale are carried, in aggregate, at fair value as WesBanco has elected the fair value option as of October 1, 2017. The use of a valuation model using quoted prices of similar instruments are significant inputs in arriving at the fair value and therefore loans held for sale are classified within level 2 of the fair value hierarchy.

Certain investments that are measured at fair value using the net asset value per share (or its equivalent) practical expedient have not been categorized in the fair value hierarchy. The fair value amounts presented in the table below are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the statement of financial position. The following tables set forth WesBanco’s financial assets and liabilities that were accounted for at fair value on a recurring and nonrecurring basis by level within the fair value hierarchy as of March 31, 2018 and December 31, 2017:

			March 31, 2018
			Fair Value Measurements Using:
	March 31, 2018		Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs		Investments Measured at Net Asset
(unaudited, in thousands)			(level 1)		(level 2)		(level 3)		Value
Recurring fair value measurements
Equity securities	$	13,986	$	11,568	$	—	$	—	$	2,418
Debt securities - available-for-sale
U.S. Treasury		9,894		—		9,894		—		—
U.S. Government sponsored entities and agencies		96,458		—		96,458		—		—
Residential mortgage-backed securities and collateralized mortgage obligations of government agencies		1,344,410		—		1,344,410		—		—
Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies		140,926		—		140,926		—		—
Obligations of state and political subdivisions		101,431		—		101,431		—		—
Corporate debt securities		35,258		—		35,258		—		—
Total debt securities - available-for-sale	$	1,728,377	$	—	$	1,728,377	$	—	$	—
Loans held for sale		12,962		—		12,962		—		—
Other assets - interest rate derivatives agreements		9,257		—		9,257		—		—
Total assets recurring fair value measurements	$	1,764,582	$	11,568	$	1,750,596	$	—	$	2,418
Other liabilities - interest rate derivatives agreements	$	9,083	$	—	$	9,083	$	—	$	—
Total liabilities recurring fair value measurements	$	9,083	$	—	$	9,083	$	—	$	—
Nonrecurring fair value measurements
Impaired loans	$	1,717	$	—	$	—	$	1,717	$	—
Other real estate owned and repossessed assets		4,067		—		—		4,067		—
Total nonrecurring fair value measurements	$	5,784	$	—	$	—	$	5,784	$	—

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			December 31, 2017
			Fair Value Measurements Using:
	December 31,		Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs		Investments Measured at Net Asset
(unaudited, in thousands)	2017		(level 1)		(level 2)		(level 3)		Value
Recurring fair value measurements
Equity securities	$	13,457	$	11,391	$	—	$	—	$	2,066
Debt securities - available-for-sale
U.S. Government sponsored entities and agencies		71,843		—		71,843		—		—
Residential mortgage-backed securities and collateralized mortgage obligations of government agencies		934,922		—		934,922		—		—
Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies		114,867		—		114,867		—		—
Obligations of state and political subdivisions		104,830		—		104,830		—		—
Corporate debt securities		35,403		—		35,403		—		—
Total debt securities - available-for-sale	$	1,261,865	$	—	$	1,261,865	$	—	$	—
Loans held for sale		20,320		—		20,320		—		—
Other assets - interest rate derivatives agreements		7,351		—		7,351		—		—
Total assets recurring fair value measurements	$	1,302,993	$	11,391	$	1,289,536	$	—	$	2,066
Other liabilities - interest rate derivatives agreements	$	7,345	$	—	$	7,345	$	—	$	—
Total liabilities recurring fair value measurements	$	7,345	$	—	$	7,345	$	—	$	—
Nonrecurring fair value measurements
Impaired loans	$	1,717	$	—	$	—	$	1,717	$	—
Other real estate owned and repossessed assets		5,297		—		—		5,297		—
Total nonrecurring fair value measurements	$	7,014	$	—	$	—	$	7,014	$	—

WesBanco’s policy is to recognize transfers between levels as of the actual date of the event or change in circumstances that caused the transfer. There were no significant transfers between level 1, 2 or 3 for the three months ended March 31, 2018 or for the year ended December 31, 2017.

The following table presents additional quantitative information about assets measured at fair value on a nonrecurring basis and for which WesBanco has utilized level 3 inputs to determine fair value:

	Quantitative Information about Level 3 Fair Value Measurements
	Fair Value		Valuation	Unobservable	Range (Weighted
(unaudited, in thousands)	Estimate		Techniques	Input	Average)
March 31, 2018
Impaired loans	$	1,717	Appraisal of collateral (1)	Appraisal adjustments (2)	(4.8%) / (4.8%)
				Liquidation expenses (2)	(7.6%) / (7.6%)
Other real estate owned and repossessed assets		4,067	Appraisal of collateral (1), (3)
December 31, 2017:
Impaired loans	$	1,717	Appraisal of collateral (1)	Appraisal adjustments (2)	(4.8%) / (4.8%)
				Liquidation expenses (2)	(7.6%) / (7.6%)
Other real estate owned and repossessed assets		5,297	Appraisal of collateral (1), (3)

⁽¹⁾ Fair value is generally determined through independent appraisals of the underlying collateral, which generally include various level 3 inputs which are not identifiable.

⁽²⁾  Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses. The range and weighted average of appraisal adjustments and liquidation expenses are presented as a percent of the appraisal.

⁽³⁾  Includes estimated liquidation expenses and numerous dissimilar qualitative adjustments by management which are not identifiable.

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The estimated fair values of WesBanco’s financial instruments are summarized below:

					Fair Value Measurements at March 31, 2018
(unaudited, in thousands)	Carrying Amount		Fair Value Estimate		Quoted Prices in Active Markets for Identical Assets (level 1)		Significant Other Observable Inputs (level 2)		Significant Unobservable Inputs (level 3)		Investments Measured at Net Asset Value
Financial Assets
Cash and due from banks	$	100,845	$	100,845	$	100,845	$	—	$	—	$	—
Equity securities		13,986		13,986		11,568		—		—		2,418
Debt securities available-for-sale		1,728,377		1,728,377		—		1,728,377		—		—
Debt securities held-to-maturity		1,006,042		1,005,502		—		1,004,912		590		—
Net loans		6,276,204		6,158,399		—		—		6,158,399		—
Loans held for sale		12,962		12,962		—		12,962		—		—
Other assets - interest rate derivatives		9,257		9,257		—		9,257		—		—
Accrued interest receivable		31,963		31,963		31,963		—		—		—
Financial Liabilities
Deposits		7,226,326		7,230,335		6,018,657		1,211,678		—		—
Federal Home Loan Bank borrowings		1,166,939		1,161,442		—		1,161,442		—		—
Other borrowings		207,653		207,627		205,651		1,976		—		—
Subordinated debt and junior subordinated debt		164,379		149,887		—		149,887		—		—
Other liabilities - interest rate derivatives		9,083		9,083		—		9,083		—		—
Accrued interest payable		4,033		4,033		4,033		—		—		—

					Fair Value Measurements at December 31, 2017
(unaudited, in thousands)	Carrying Amount		Fair Value Estimate		Quoted Prices in Active Markets for Identical Assets (level 1)		Significant Other Observable Inputs (level 2)		Significant Unobservable Inputs (level 3)		Investments Measured at Net Asset Value
Financial Assets
Cash and due from banks	$	117,572	$	117,572	$	117,572	$	—	$	—	$	—
Equity securities		13,457		13,457		11,391		—		—		2,066
Debt securities available-for-sale		1,261,865		1,261,865		—		1,261,865		—		—
Debt securities held-to-maturity		1,009,500		1,023,784		—		1,023,191		593		—
Net loans		6,296,157		6,212,823		—		—		6,212,823		—
Loans held for sale		20,320		20,320		—		20,320		—		—
Other assets - interest rate derivatives		7,351		7,351		—		7,351		—		—
Accrued interest receivable		29,728		29,728		29,728		—		—		—
Financial Liabilities
Deposits		7,043,588		7,053,536		5,766,531		1,287,005		—		—
Federal Home Loan Bank borrowings		948,203		944,706		—		944,706		—		—
Other borrowings		184,805		184,814		182,785		2,029		—		—
Subordinated debt and junior subordinated debt		164,327		146,484		—		146,484		—		—
Other liabilities - interest rate derivatives		7,345		7,345		—		7,345		—		—
Accrued interest payable		3,178		3,178		3,178		—		—		—

The following methods and assumptions were used to measure the fair value of financial instruments recorded at cost on WesBanco’s consolidated balance sheets:

Cash and due from banks: The carrying amount for cash and due from banks is a reasonable estimate of fair value.

Debt securities held-to-maturity: Fair values for debt securities held-to-maturity are determined in the same manner as the investment securities which are described above.

Net loans: Fair values for loans are estimated using a discounted cash flow methodology. The discount rates take into account interest rates currently being offered to customers for loans with similar terms, the credit risk associated with the loan and other market factors, including liquidity.

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WesBanco believes the discount rates are consistent with transactions occurring in the marketplace for both performing and distressed loan types. The carrying value is net of the allowance for loan losses and other associated premiums and discounts. Due to the significant judgment involved in evaluating credit quality, loans are classified within level 3 of the fair value hierarchy.

Accrued interest receivable: The carrying amount of accrued interest receivable approximates its fair value.

Deposits: The carrying amount is considered a reasonable estimate of fair value for demand, savings and other variable rate deposit accounts. The fair value of fixed maturity certificates of deposit is estimated by a discounted cash flow method using rates currently offered for deposits of similar remaining maturities.

Federal Home Loan Bank borrowings: The fair value of FHLB borrowings is based on rates currently available to WesBanco for borrowings with similar terms and remaining maturities.

Other borrowings: The carrying amount of federal funds purchased and overnight sweep accounts generally approximate fair value. Other repurchase agreements are based on quoted market prices if available. If market prices are not available, for certain fixed and adjustable rate repurchase agreements, then quoted market prices of similar instruments are used.

Subordinated debt and junior subordinated debt: The fair value of subordinated debt is estimated using discounted cash flow analyses based on the current borrowing rates for similar types of borrowing arrangements. Due to the pooled nature of junior subordinated debt owed to unconsolidated subsidiary trusts, which are not actively traded, estimated fair value is based on recent similar transactions of single-issuer trust preferred securities.

Accrued interest payable: The carrying amount of accrued interest payable approximates its fair value.

Off-balance sheet financial instruments: Off-balance sheet financial instruments consist of commitments to extend credit, including letters of credit. Fair values for commitments to extend credit are estimated using the fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements and the present credit standing of the counterparties. The estimated fair value of the commitments to extend credit and letters of credit are insignificant and therefore are not presented in the above tables.

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NOTE 8. REVENUE RECOGNITION

WesBanco adopted ASU 2014-09 as of January 1, 2018 under the modified retrospective approach and there was no material impact on WesBanco’s Consolidated Financial statements. Interest income, net securities (losses) gains and bank-owned life insurance are not in scope of ASC 606, Revenue from Contracts with Customers. For the revenue streams in scope of ASC 606 - trust fees, service charges on deposits, electronic banking fees, net securities brokerage revenue, mortgage banking income and net gain or loss on sale of other real estate owned – there are no significant judgements related to the amount and timing of revenue recognition.

Trust fees: Fees are earned over a period of time between monthly and annually, per the related fee schedule. The fees are earned ratably over the period for investment, safekeeping and other services performance by WesBanco. The fees are accrued when earned based on the daily asset value on the last day of the quarter. In most cases, the fees are directly debited from the customer account.

Service charges on deposits: There are monthly service charges for both commercial and personal banking customers, which are earned over the month per the related fee schedule based on the customers’ deposits. There are also transaction-based fees, which are earned based on specific transactions or customer activity within the customers’ deposit accounts. These are earned at the time the transaction or customer activity occurs. The fees are debited from the customer account.

Electronic banking fees: Interchange and ATM fees are earned based on customer and ATM transactions. Revenue is recognized when the transaction is settled.

Net securities brokerage revenue: Commission income is earned based on customer transactions and management of investments. The commission income from customers’ transactions is recognized when the transaction is complete. The commission income from the management of investments is earned continuously over a quarterly period.

Mortgage banking income: Income is earned when WesBanco-originated loans are sold to an investor on the secondary market. The investor bids on the loans. If the price is accepted, WesBanco delivers the loan documents to the investor. Once received and approved by the investor, revenue is recognized and the loans are derecognized from the Consolidated Balance Sheet. Prior to the loans being sold, they are classified as loans held for sale. Additionally, the changes in the fair value of the loans held for sale, loan commitments and related derivatives are included in mortgage banking income.

Net gain or loss on sale of other real estate owned: Net gain or loss is recorded when other real estate is sold to a third party and the Bank collects substantially all of the consideration to which WesBanco is entitled in exchange for the transfer of the property.

The following table summarizes the point of revenue recognition and the income recognized for each of the revenue streams for the three months ended March 31, 2018:

(unaudited, in thousands)	Point of Revenue Recognition		For the Three Months Ended March 31, 2018
Revenue Streams
Trust Fees
Trust account fees		Over time	$	4,292
WesMark fees		Over time		2,211
Total trust fees				6,503
Service charges on deposits
Commercial banking fees		Over time		407
Personal service charges		At a point in time & Over time		4,415
Total service charges on deposits				4,822
Net securities brokerage revenue
Annuity commissions		At a point in time		1,200
Equity and debt security trades		At a point in time		102
Managed money		Over time		141
Trail commissions		Over time		227
Total net securities brokerage revenue				1,670
Electronic banking fees		At a point in time		4,829
Mortgage banking income		At a point in time		1,004
Gain/loss on sale of OREO/other assets		At a point in time		262

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NOTE 9. COMPREHENSIVE INCOME/(LOSS)

The activity in accumulated other comprehensive income for the three months ended March 31, 2018 and 2017 is as follows:

	Accumulated Other Comprehensive Income/(Loss) (1)
(unaudited, in thousands)	Defined Benefit Pension Plan			Unrealized Gains (Losses) on Debt Securities Available-for-Sale			Unrealized Gains on Debt Securities Transferred from Available-for-Sale to Held-to-Maturity			Total
Balance at December 31, 2017	$	(18,626	)	$	(13,250	)	$	381		$	(31,495	)
Other comprehensive income before reclassifications		—			(14,905	)		—			(14,905	)
Amounts reclassified from accumulated other comprehensive income		437			—			(50	)		387
Period change		437			(14,905	)		(50	)		(14,518	)
Adoption of Accounting Standard ASU 2016-01 (2)		—			(1,063	)		—			(1,063	)
Balance at March 31, 2018	$	(18,189	)	$	(29,218	)	$	331		$	(47,076	)
Balance at December 31, 2016	$	(17,758	)	$	(9,890	)	$	522		$	(27,126	)
Other comprehensive income before reclassifications		—			1,680			—			1,680
Amounts reclassified from accumulated other comprehensive income		655			—			(50	)		605
Period change		655			1,680			(50	)		2,285
Balance at March 31, 2017	$	(17,103	)	$	(8,210	)	$	472		$	(24,841	)

⁽¹⁾  All amounts are net of tax. Related income tax expense or benefit is calculated using a combined Federal and State income tax rate approximating 23% in 2018 and 37% in all prior periods.

⁽²⁾  See Note 1, Summary of Significant Accounting Policies for additional information about WesBanco’s adoption of ASU 2016-01.

The following table provides details about amounts reclassified from accumulated other comprehensive income for the three months ended March 31, 2018 and 2017:

Details about Accumulated Other Comprehensive Income/(Loss) Components	Amounts Reclassified from Accumulated Other Comprehensive Income/(Loss) For the Three Months Ended March 31,						Affected Line Item in the Statement of Net Income
(unaudited, in thousands)	2018			2017
Debt securities available-for-sale (1):
Net securities gains reclassified into earnings	$	—		$	—		Net securities gains (Non-interest income)
Related income tax expense		—			—		Provision for income taxes
Net effect on accumulated other comprehensive income for the period		—			—
Debt securities held-to-maturity (1):
Amortization of unrealized gain transferred from available-for-sale		(66	)		(72	)	Interest and dividends on securities (Interest and dividend income)
Related income tax expense		16			22		Provision for income taxes
Net effect on accumulated other comprehensive income for the period		(50	)		(50	)
Defined benefit pension plan (2):
Amortization of net loss and prior service costs		756			801		Employee benefits (Non-interest expense)
Related income tax benefit		(319	)		(146	)	Provision for income taxes
Net effect on accumulated other comprehensive income for the period		437			655
Total reclassifications for the period	$	387		$	605

⁽¹⁾ For additional detail related to unrealized gains on securities and related amounts reclassified from accumulated other comprehensive income, see Note 3, “Securities.”

⁽²⁾ Included in the computation of net periodic pension cost. See Note 6, “Pension Plan” for additional detail.

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NOTE 10. COMMITMENTS AND CONTINGENT LIABILITIES

Commitments — In the normal course of business, WesBanco offers off-balance sheet credit arrangements to enable its customers to meet their financing objectives. Those instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the financial statements. WesBanco’s exposure to credit losses in the event of non-performance by the other parties to the financial instruments for commitments to extend credit and standby letters of credit is limited to the contractual amount of those instruments. WesBanco uses the same credit policies in making commitments and conditional obligations as for all other lending. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The allowance for credit losses associated with commitments was ($0.6) million as of both March 31, 2018 and December 31, 2017, and is included in other liabilities on the Consolidated Balance Sheets.

Letters of credit are conditional commitments issued by banks to guarantee the performance of a customer to a third party. Those guarantees are primarily issued to support public and private borrowing arrangements, including normal business activities, bond financing and similar transactions. Letters of credit are considered guarantees. The liability associated with letters of credit was $0.2 million as of both March 31, 2018 and December 31, 2017.

Contingent obligations and other guarantees include affordable housing plan guarantees, credit card guarantees and obligations under the FHLB’s loan purchasing program. Affordable housing plan guarantees are performance guarantees for various building project loans. The guarantee amortizes as the loan balances decrease. Credit card guarantees are credit card balances not owned by WesBanco, whereby the Bank guarantees the performance of the cardholder. The mortgages sold to FHLB obligate WesBanco to reimburse the FHLB for a portion of the loan balances that default.

The following table presents total commitments to extend credit, guarantees and various letters of credit outstanding:

	March 31,		December 31,
(unaudited, in thousands)	2018		2017
Lines of credit	$	1,464,970	$	1,452,697
Loans approved but not closed		358,367		245,644
Overdraft limits		124,752		126,671
Letters of credit		31,947		31,951
Contingent obligations and other guarantees		6,796		6,700

Contingent Liabilities — WesBanco is a party to various legal and administrative proceedings and claims. While any litigation contains an element of uncertainty, management does not believe that a material loss related to such proceedings or claims pending or known to be threatened is reasonably possible.

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NOTE 11. BUSINESS SEGMENTS

WesBanco operates two reportable segments: community banking and trust and investment services. WesBanco’s community banking segment offers services traditionally offered by full-service commercial banks, including commercial demand, individual demand and time deposit accounts, as well as commercial, mortgage and individual installment loans, and certain non-traditional offerings, such as insurance and securities brokerage services. The trust and investment services segment offers trust services as well as various alternative investment products including mutual funds. The market value of assets managed or held in custody by the trust and investment services segment was approximately $4.0 billion and $3.8 billion at March 31, 2018 and 2017, respectively. These assets are held by WesBanco in fiduciary or agency capacities for their customers and therefore are not included as assets on WesBanco’s Consolidated Balance Sheets.

Condensed financial information by business segment is presented below:

			Trust and
	Community		Investment
(unaudited, in thousands)	Banking		Services		Consolidated
For the Three Months ended March 31, 2018:
Interest and dividend income	$	86,417	$	—	$	86,417
Interest expense		13,125		—		13,125
Net interest income		73,292		—		73,292
Provision for credit losses		2,168		—		2,168
Net interest income after provision for credit losses		71,124		—		71,124
Non-interest income		17,477		6,503		23,980
Non-interest expense		50,894		3,677		54,571
Income before provision for income taxes		37,707		2,826		40,533
Provision for income taxes		6,411		593		7,004
Net income	$	31,296	$	2,233	$	33,529
For the Three Months ended March 31, 2017:
Interest and dividend income	$	79,924	$	—	$	79,924
Interest expense		9,205		—		9,205
Net interest income		70,719		—		70,719
Provision for credit losses		2,711		—		2,711
Net interest income after provision for credit losses		68,008		—		68,008
Non-interest income		16,741		6,143		22,884
Non-interest expense		50,992		3,392		54,384
Income before provision for income taxes		33,757		2,751		36,508
Provision for income taxes		9,522		1,100		10,622
Net income	$	24,235	$	1,651	$	25,886

Total non-fiduciary assets of the trust and investment services segment were $1.8 million and $3.8 million at March 31, 2018 and 2017, respectively. All other assets, including goodwill and other intangible assets, were allocated to the community banking segment.

NOTE 12. SUBSEQUENT EVENTS

On April 5, 2018, WesBanco completed its acquisition of First Sentry Bancshares, Inc. (“FTSB”), a bank holding company headquartered in Huntington, West Virginia. As of March 31, 2018, FTSB had approximately $705.1 million in assets excluding goodwill, $577.4 million in total deposits, $459.5 million in total loans and 5 branches in West Virginia. The acquisition was valued at approximately $107.5 million and resulted in WesBanco issuing approximately 2.5 million shares of its common stock and $1.0 million in cash in exchange for FTSB common stock. The assets and liabilities of FTSB will be recorded on WesBanco’s balance sheet at their preliminary estimated fair values as of April 5, 2018, the acquisition date, and FTSB’s results of operations will be included in WesBanco’s Consolidated Statements of Income from that date. For the three months ended March 31, 2018, WesBanco recorded merger-related expenses of $0.2 million associated with the FTSB acquisition. WesBanco accounts for business combinations using the acquisition method of accounting. The initial accounting and determination of the fair values of the assets and liabilities resulting from the acquisition was incomplete at the time of this filing due to the timing of the closing of the acquisition in relation to WesBanco’s required Form 10-Q filing deadline. A more complete disclosure of the business combination is expected to be reported in WesBanco’s Form 10-Q as of June 30, 2018.

On April 19, 2018, WesBanco and Farmers Capital Bank Corporation (“Farmers”), a bank holding company headquartered in Frankfort, Kentucky with approximately $1.7 billion in assets, $1.4 billion in deposits, $1.0 billion in loans and 34 branches, jointly announced that a definitive Agreement and Plan of Merger was executed providing for the merger of Farmers with and into WesBanco. On the date of the announcement, the transaction was valued at approximately $378.2 million. Under the terms of the Agreement and Plan of Merger, which has been approved by that board of directors of both companies, WesBanco will exchange a combination of its common stock and cash for Farmers common stock. Farmers shareholders will be entitled to receive 1.053 shares of WesBanco common stock and cash in the amount of $5.00 per share for each share of Farmers’common stock for a total value of approximately $50.31 per share at the date of announcement. The receipt by Farmers’ shareholders of shares of WesBanco common stock in exchange for their shares of Farmers common stock is anticipated to qualify as a tax-free exchange. The acquisition is subject to the approvals of the appropriate banking regulatory authorities and the shareholders of Farmers. It is expected that the transaction will be completed in the third or fourth quarter of 2018.

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Management’s Discussion and Analysis (“MD&A”) represents an overview of the results of operations and financial condition of WesBanco for the three months ended March 31, 2018. This discussion and analysis should be read in conjunction with the Consolidated Financial Statements and Notes thereto.

FORWARD-LOOKING STATEMENTS

Forward-looking statements in this report relating to WesBanco’s plans, strategies, objectives, expectations, intentions and adequacy of resources, are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. The information contained in this report should be read in conjunction with WesBanco’s Form 10-K for the year ended December 31, 2017 and documents subsequently filed by WesBanco with the Securities and Exchange Commission (“SEC”), which are available at the SEC’s website, www.sec.gov or at WesBanco’s website, www.wesbanco.com. Investors are cautioned that forward-looking statements, which are not historical fact, involve risks and uncertainties, including those detailed in WesBanco’s most recent Annual Report on Form 10-K filed with the SEC under “Risk Factors” in Part I, Item 1A. Such statements are subject to important factors that could cause actual results to differ materially from those contemplated by such statements, including, without limitation, that the businesses of WesBanco, FTSB and Farmers may not integrated successfully or such integration may take longer to accomplish than expected; the expected cost savings and any revenue synergies from the merger of WesBanco, FTSB and Farmers may not be fully realized within the expected timeframes; disruption from the merger of WesBanco, FTSB and Farmers may make it more difficult to maintain relationships with clients, associates, or suppliers; the effects of changing regional and national economic conditions; changes in interest rates, spreads on earning assets and interest-bearing liabilities, and associated interest rate sensitivity; sources of liquidity available to WesBanco and its related subsidiary operations; potential future credit losses and the credit risk of commercial, real estate, and consumer loan customers and their borrowing activities; actions of the Federal Reserve Board, the FDIC, the SEC, FINRA, the Municipal Securities Rulemaking Board, the Securities Investors Protection Corporation, and other regulatory bodies; potential legislative and federal and state regulatory actions and reform, including, without limitation, the impact of the implementation of the Dodd-Frank Act; adverse decisions of federal and state courts; fraud, scams and schemes of third parties; internet hacking; competitive conditions in the financial services industry; rapidly changing technology affecting financial services; marketability of debt instruments and corresponding impact on fair value adjustments; and/or other external developments materially impacting WesBanco’s operational and financial performance. WesBanco does not assume any duty to update forward-looking statements.

OVERVIEW

WesBanco is a multi-state bank holding company operating through 177 branches and 168 ATM machines in West Virginia, Ohio, western Pennsylvania, Kentucky, and southern Indiana, offering retail banking, corporate banking, personal and corporate trust services, brokerage services, mortgage banking and insurance. WesBanco’s businesses are significantly impacted by economic factors such as market interest rates, federal monetary and regulatory policies, local and regional economic conditions and the competitive environment’s effect upon WesBanco’s business volumes. WesBanco’s deposit levels are affected by numerous factors including personal savings rates, personal income, and competitive rates on alternative investments, as well as competition from other financial institutions within the markets we serve and liquidity needs of WesBanco. Loan levels are also subject to various factors including construction demand, business financing needs, consumer spending and interest rates, as well as loan terms offered by competing lenders.

APPLICATION OF CRITICAL ACCOUNTING POLICIES AND ESTIMATES

WesBanco’s critical accounting policies involving the significant judgments and assumptions used in the preparation of the Consolidated Financial Statements as of March 31, 2018 have remained unchanged from the disclosures presented in WesBanco’s Annual Report on Form 10-K for the year ended December 31, 2017 within the section “Management’s Discussion and Analysis of Financial Condition and Results of Operations.”

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RESULTS OF OPERATIONS

EARNINGS SUMMARY

Net income for the three months ended March 31, 2018 was $33.5 million, with diluted earnings per share of $0.76, compared to $25.9 million and $0.59 per diluted share, respectively, for the first quarter of 2017. Excluding after-tax merger-related expenses (non-GAAP measure) in both periods, net income and diluted earnings per share would have increased 28.7% to $33.7 million, or $0.76 per diluted share for the three months ended March 31, 2018, as compared to the prior year quarter.

	For the Three Months Ended March 31,
	2018					2017
(unaudited, dollars in thousands, except per share amounts)	Net Income			Diluted Earnings Per Share		Net Income			Diluted Earnings Per Share
Net income (Non-GAAP)(1)	$	33,722		$	0.76	$	26,205		$	0.60
Less: After tax merger-related expenses		(193	)		—		(319	)		(0.01	)
Net income (GAAP)	$	33,529		$	0.76	$	25,886		$	0.59

⁽¹⁾ Non-GAAP net income excludes after-tax merger-related expenses. The above non-GAAP financial measures used by WesBanco provide information useful to investors in understanding WesBanco’s operating performance and trends, and facilitate comparisons with the performance of WesBanco’s peers.

Net interest income increased $2.6 million or 3.6% in the first quarter of 2018 compared to the same quarter of 2017 due to a 2.7% increase in average earning assets. In addition, the yield on earning assets has increased a total of 13 basis points since the first quarter of 2017. However, the net interest margin decreased by 4 basis points to 3.38% in the first quarter of 2018 compared to 3.42% in the first quarter of 2017 due primarily due to a 6 basis point reduction in the tax-equivalency of the income from state and local municipal tax-exempt securities portfolio resulting from the “Tax Cuts and Jobs Act” signed into law in December 2017. The net interest margin has somewhat benefited from increases in the Federal Reserve Board’s target federal funds rate over the past year, partially offset by higher funding costs as well as a flattening of the yield curve. The increase in the cost of interest bearing liabilities is primarily due to higher rates for interest bearing public funds, and certain Federal Home Loan Bank and other borrowings. Accretion from prior acquisitions benefited the first quarter net interest margin by approximately six basis points, as compared to eight basis points in the prior year period.

The provision for credit losses decreased to $2.2 million in the first quarter of 2018, compared to $2.7 million in the first quarter of 2017, due to continued strength in the loan credit quality and minimal overall loan growth. Net charge-offs, as a percentage of average portfolio loans of 0.07% in the first quarter of 2018 were lower than the 0.15% in the first quarter of 2017.

For the first quarter of 2018, non-interest income increased $1.1 million, or 4.8%, compared to the first quarter of 2017. Bank owned-life insurance increased $1.6 million or 141.8%, due to higher death benefits received during the quarter compared to the first quarter of 2017. Trust fees increased $0.3 million or 5.9%, as equity markets improved and trust assets increased 5.0% since the first quarter of 2017. Electronic banking fees increased $0.3 million or 6.6% based on increased debit card volume. Net gain (loss) on other real estate owned and other assets increased $0.3 million or 444.7% as result of an increase in a venture capital fund established for qualifying Community Reinvestment Act investment purposes in 2009.

The following comments on non-interest expense exclude merger-related expenses in both years. Non-interest expense in the first quarter of 2018 grew slightly by $0.4 million or 0.8%, compared to the 2017 first quarter. Salaries and wages increased $2.0 million or 8.7% compared to last year’s first quarter. However, employee benefit expenses decreased $1.3 million or 15.8% as compared to the first quarter of 2017. These fluctuations are primarily due to the adoption of an accounting standard, which requires the service component of pension expense to be included in salaries and wages as opposed to employee benefit expenses. The pronouncement was adopted January 1, 2018.

The effective income tax rate and associated provision for income taxes for the first quarter of 2018 are reflective of the recently enacted “Tax Cuts and Jobs Act”, which lowered the Federal income tax rate for corporations to 21%. During the first quarter, the effective tax rate was 17.28% as compared to 29.09% last year, while the provision for income taxes decreased $3.6 million to $7.0 million, despite higher year-over-year pre-tax income.

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NET INTEREST INCOME

TABLE 1. NET INTEREST INCOME

	For the Three Months Ended
	March 31,
(unaudited, dollars in thousands)	2018			2017
Net interest income	$	73,292		$	70,719
Taxable equivalent adjustment to net interest income		1,285			2,634
Net interest income, fully taxable equivalent	$	74,577		$	73,353
Net interest spread, non-taxable equivalent		3.12	%		3.16	%
Benefit of net non-interest bearing liabilities		0.20	%		0.14	%
Net interest margin		3.32	%		3.30	%
Taxable equivalent adjustment		0.06	%		0.12	%
Net interest margin, fully taxable equivalent		3.38	%		3.42	%

Net interest income, which is WesBanco’s largest source of revenue, is the difference between interest income on earning assets, primarily loans and securities, and interest expense on liabilities (deposits and short and long-term borrowings). Net interest income is affected by the general level and changes in interest rates, the steepness and shape of the yield curve, changes in the amount and composition of interest earning assets and interest bearing liabilities, as well as the frequency of repricing of existing assets and liabilities. Net interest income increased $2.6 million or 3.6% in the first quarter of 2018 compared to 2017, due to a 2.7% increase in average earning asset balances, primarily from an 11.6% increase in average taxable securities balances. Average loan balances increased by 1.0% in the first quarter of 2018 compared to the first quarter of 2017, and were driven by growth in total commercial loans and home equity loans, both strategic focus categories of WesBanco, which more than offset the targeted reductions in the consumer portfolio to reduce the overall loan portfolio’s risk profile. Total average deposits increased in the first quarter of 2018 by $64.1 million or 0.9% compared to the first quarter of 2017, while certificates of deposit, which have the highest overall interest cost among deposits, decreased by $213.0 million or 14.6% over the same time period. The effect of multiple increases in the Federal Reserve’s target federal funds rate over the past year on the net interest margin were offset by lower tax equivalent yields on tax-exempt securities resulting from the decrease in the corporate tax rate to 21% for 2018. Due to this adjustment in tax-equivalency, the net interest margin decreased to 3.38% for the first quarter of 2018 compared to 3.42% in the first quarter of 2017. Yields increased for all earning asset categories in 2018 except for tax-exempt securities. The cost of interest bearing liabilities increased by 23 basis points from the first quarter of 2017. The increase in the cost of interest bearing liabilities is primarily due to rate increases for larger balance customers in interest bearing demand deposits, which include public funds, and higher rates for certain short term and Federal Home Loan Bank borrowings. Approximately 6 basis points of accretion from prior acquisitions was included in the 2018 first quarter net interest margin compared to 8 basis points in the 2017 first quarter net interest margin.

Interest income increased $6.5 million or 8.1% in the first quarter of 2018 compared to the first quarter of 2017 due to higher average loan and securities balances and higher yields in almost every earning asset category. Earning asset yields were influenced positively in the first quarter of 2018 compared to the first quarter of 2017 due to three federal funds rate increases occurring during the past twelve months. Average loan balances increased by $60.8 million or 1.0% in the first quarter of 2018 compared to the same period of 2017, primarily due to increases in commercial and home equity loans. Loan yields increased by 24 basis points during this same period to 4.43% from the previously mentioned federal funds rate increases. In the first quarter of 2018, average loans represented 71.2% of average earning assets, a decrease from 72.4% in the first quarter of 2017, primarily due to purchases of taxable securities exceeding the average loan growth. Average taxable securities balances increased by $186.0 million or 11.6% from the first quarter of 2017, consistent with management’s strategy of growing total assets above $10 billion in the first quarter of 2018 to improve profitability. Total securities yields decreased by 12 basis points in 2018 from the first quarter of 2017 due a lower tax-equivalency benefit on tax-exempt securities, resulting from the “Tax Cuts and Jobs Act”, which decreased the corporate tax rate from 35% to 21%. This yield decrease had no effect on net interest income, as the tax effect is included in the provision for income taxes. The average balance of tax-exempt securities decreased slightly from the first quarter of 2017, and was 28.6% of total average securities in 2018 compared to 31.2% in the first quarter of 2017. Taxable securities yields increased by 19 basis points in the first quarter of 2018 as compared to the first quarter of 2017 due to purchases in the first quarter of 2018 at higher market rates.

Total portfolio loans increased $10.4 million or 0.2% over the last twelve months, while total commercial loans increased $74.2 million or 1.8%. Loan growth was achieved through $1.8 billion in total loan originations, led by $1.2 billion in business loan originations for the past twelve months. Loan growth was driven by expanded market areas and additional commercial personnel in our core markets, partially offset by significant loan paydowns or payoffs as some loans moved into the secondary lending market by customers who refinanced their mortgages, and targeted reductions of the consumer portfolio to reduce the risk profile of the loan portfolio.

Interest expense increased $3.9 million or 42.6% in the first quarter of 2018 compared to the first quarter of 2017, due primarily to increases in the rates paid on most interest bearing liability categories. The cost of interest bearing liabilities increased by 23 basis points from the first quarter of 2017 to 0.80% in the first quarter of 2018. Average interest bearing deposits decreased by $24.0 million or 0.5% from the first quarter of 2017, due primarily to a decrease in the average balance of CDs of $213.0 million or 14.6%. This decrease was partially due to a $42.5 million reduction in CDARS^® balances from $116.7 million at March 31, 2017 to $74.2 million at March 31, 2018. The rate on interest bearing deposits increased by 14 basis points from the first quarter of 2017, primarily from increases in rates on interest bearing public funds. Average non-interest bearing demand deposits increased from the first quarter of 2017 to the first quarter of 2018 by $88.1 million or 4.9% and are now 26.3% of total average deposits, compared to 25.3% in 2017, reflecting customers’ preferences and marketing strategies. The increase in non-interest bearing deposits reflect positively in the net interest margin, as the benefit of non-interest bearing liabilities increased by 6 basis points from the first quarter of 2017

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to the first quarter of 2018. Average other borrowings and subordinated debt balances remained virtually unchanged from the first quarter of 2017, but their average rates paid increased by 49 and 30 basis points, respectively, over this time period due to increases in LIBOR, the index upon which most of this variable-rate type of borrowing is priced. The average balance of FHLB borrowings increased by $88.4 million from the first quarter of 2017, and their average rate paid increased by 55 basis points to 1.76% over this same time period due to higher interest rates and the replacement of some maturing shorter-term borrowings with those of a medium-term length throughout 2017 and the first quarter of 2018 to improve asset sensitivity and liquidity measures.

TABLE 2. AVERAGE BALANCE SHEETS AND NET INTEREST MARGIN ANALYSIS

	For the Three Months Ended March 31,
	2018					2017
	Average		Average			Average		Average
(unaudited, dollars in thousands)	Balance		Rate			Balance		Rate
ASSETS
Due from banks – interest bearing	$	8,727		2.06	%	$	13,926		0.52	%
Loans, net of unearned income (1)		6,339,550		4.43	%		6,278,718		4.19	%
Securities: (2)
Taxable		1,789,336		2.58	%		1,603,337		2.39	%
Tax-exempt (3)		717,624		3.41	%		726,658		4.14	%
Total securities		2,506,960		2.82	%		2,329,995		2.94	%
Other earning assets		50,388		6.02	%		47,025		4.43	%
Total earning assets (3)		8,905,625		3.98	%		8,669,664		3.85	%
Other assets		1,087,739					1,111,813
Total Assets	$	9,993,364				$	9,781,477
LIABILITIES AND SHAREHOLDERS’ EQUITY
Interest bearing demand deposits	$	1,697,755		0.60	%	$	1,536,282		0.29	%
Money market accounts		1,005,236		0.35	%		1,038,584		0.22	%
Savings deposits		1,288,120		0.06	%		1,227,190		0.06	%
Certificates of deposit		1,241,228		0.83	%		1,454,245		0.67	%
Total interest bearing deposits		5,232,339		0.47	%		5,256,301		0.33	%
Federal Home Loan Bank borrowings		1,037,441		1.76	%		949,001		1.21	%
Other borrowings		204,833		1.10	%		197,358		0.61	%
Subordinated debt and junior subordinated debt		164,334		4.79	%		163,913		4.49	%
Total interest bearing liabilities (1)		6,638,947		0.80	%		6,566,573		0.57	%
Non-interest bearing demand deposits		1,869,624					1,781,513
Other liabilities		83,522					75,789
Shareholders’ equity		1,401,271					1,357,602
Total Liabilities and Shareholders’ Equity	$	9,993,364				$	9,781,477
Taxable equivalent net interest spread				3.18	%				3.28	%
Taxable equivalent net interest margin				3.38	%				3.42	%

(1) Gross of allowance for loan losses and net of unearned income. Includes non-accrual and loans held for sale. Loan fees included in interest income on loans totaled $0.7 million and $0.6 million for the three months ended March 31, 2018 and 2017, respectively. Additionally, loan accretion included in net interest income on loans acquired from prior acquisitions was $1.2 million and $1.3 million for the three months ended March 31, 2018 and 2017, respectively, while accretion on interest bearing liabilities from prior acquisitions was $0.2 million and $0.5 million for the three months ended March 31, 2018 and 2017, respectively.

(2) Average yields on available-for-sale debt securities are calculated based on amortized cost.

(3) Taxable equivalent basis is calculated on tax-exempt securities using a rate of 21% for 2018 and 35% for 2017.

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TABLE 3. RATE/VOLUME ANALYSIS OF CHANGES IN INTEREST INCOME AND INTEREST EXPENSE

	Three Months Ended March 31, 2018
	Compared to March 31, 2017
(unaudited, in thousands)	Volume			Rate			Net Increase (Decrease)
Increase (decrease) in interest income:
Due from banks—interest bearing	$	(9	)	$	36		$	27
Loans, net of unearned income		634			3,705			4,339
Taxable securities		1,165			782			1,947
Tax-exempt securities (1)		(92	)		(1,314	)		(1,406	)
Other earning assets		39			198			237
Total interest income change (1)		1,737			3,407			5,144
Increase (decrease) in interest expense:
Interest bearing demand deposits		126			1,305			1,431
Money market accounts		(19	)		323			304
Savings deposits		8			—			8
Certificates of deposit		(385	)		510			125
Federal Home Loan Bank borrowings		285			1,377			1,662
Other borrowings		12			249			261
Subordinated debt and junior subordinated debt		5			124			129
Total interest expense change		32			3,888			3,920
Net interest income increase (decrease) (1)	$	1,705		$	(481	)	$	1,224

(1) Taxable equivalent basis is calculated on tax-exempt securities using a tax rate of 21% for 2018 and 35% for 2017.

PROVISION FOR CREDIT LOSSES

The provision for credit losses is the amount to be added to the allowance for credit losses after net charge-offs have been deducted to bring the allowance to a level considered appropriate to absorb probable losses in the loan portfolio. The provision for credit losses also includes the amount to be added to the reserve for loan commitments to bring that reserve to a level considered appropriate to absorb probable losses on unfunded commitments. The provision for credit losses decreased to $2.2 million in the first quarter of 2018 compared to $2.7 million in the first quarter of 2017 due primarily to the consistent high quality of the loan portfolio. Overall, most credit ratios continued to improve on a percentage basis, year-over-year. Non-performing loans (including TDRs), and criticized and classified loans all improved as a percentage of total portfolio loans from March 31, 2017. Total non-performing loans were 0.62% of total loans at March 31, 2018, decreasing from 0.74% of total loans at the end of the first quarter of 2017. Criticized and classified loans were 1.08% of total loans, improving from 1.35% at March 31, 2017. Past due loans at March 31, 2018 were 0.25% of total loans, compared to 0.22% at March 31, 2017. Annualized net loan charge-offs also decreased from 0.15% at March 31, 2017 to 0.07% at March 31, 2018. (Please see the Allowance for Credit Losses section of this MD&A for additional discussion).

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NON-INTEREST INCOME

TABLE 4. NON-INTEREST INCOME

	For the Three Months Ended March 31,
(unaudited, dollars in thousands)	2018			2017			$ Change			% Change
Trust fees	$	6,503		$	6,143		$	360			5.9
Service charges on deposits		4,822			4,853			(31	)		(0.6	)
Electronic banking fees		4,829			4,528			301			6.6
Net securities brokerage revenue		1,670			1,762			(92	)		(5.2	)
Bank-owned life insurance		2,756			1,140			1,616			141.8
Mortgage banking income		1,004			1,440			(436	)		(30.3	)
Net securities (losses) gains		(39	)		12			(51	)		(425.0	)
Net gain (loss) on other real estate owned and other assets		262			(76	)		338			444.7
Net insurance services revenue		892			916			(24	)		(2.6	)
Swap fee and valuation income		517			757			(240	)		(31.7	)
Other		764			1,409			(645	)		(45.8	)
Total non-interest income	$	23,980		$	22,884		$	1,096			4.8

Non-interest income is a significant source of revenue and an important part of WesBanco’s results of operations. WesBanco offers its customers a wide range of retail, commercial, investment and electronic banking services, which are viewed as a vital component of WesBanco’s ability to attract and maintain customers, as well as providing additional fee income beyond normal spread-related income to WesBanco. For the first quarter of 2018, non-interest income increased $1.1 million or 4.8% compared to the first quarter of 2017. The increase is driven by a $1.6 million increase in bank-owned life insurance, a $0.4 million increase in trust fees, a $0.3 million increase in electronic banking fees and a $0.3 million increase in net gain (loss) on other real estate owned and other assets, partially offset by decreases in other income, swap fee and valuation income, and mortgage banking income compared to the first quarter of 2017.

Trust fees increased $0.4 million or 5.9% compared to the first quarter of 2017 due to market improvements and customer and revenue development initiatives. Total trust assets have increased $0.2 billion from $3.8 billion at March 31, 2017 to $4.0 billion at March 31, 2018. At March 31, 2018, trust assets include managed assets of $3.3 billion and non-managed (custodial) assets of $0.7 billion. Assets managed for the WesMark Funds, a proprietary group of mutual funds that is advised by WesBanco Trust and Investment Services, were $933.6 million as of March 31, 2018 and $906.2 million at March 31, 2017 and are included in trust-managed assets.

Service charges on deposits remained consistent quarter over quarter, decreasing by 0.6%. Deposits increased $80.6 million to $7.2 billion as of March 31, 2018 as compared to $7.1 billion as of March 31, 2017.

Electronic banking fees, which include debit card interchange fees, continued to grow, increasing $0.3 million or 6.6% compared to the first three months of 2017, due to a higher volume of debit card transactions from WesBanco’s customer base. The volume increase is due to a higher percentage of customers using these products as well as marketing initiatives.

Bank-owned life insurance increased $1.6 million or 141.8% compared to first quarter of 2017 due to higher death benefits received during the period. The total cash surrender value of bank-owned life insurance increased $2.6 million to $191.8 million as of March 31, 2018 as compared to March 31, 2017.

Mortgage banking income decreased $0.4 million or 30.3% as compared to first quarter of 2017 primarily due to a $0.5 million favorable market adjustment recognized during the first quarter of 2017. Mortgage production was $73.3 million, which decreased 10.9% from the comparable 2017 quarter. Mortgages sold into the secondary market represented $38.6 million or 52.7% of overall mortgage loan production in the first three months of 2018 compared to $36.1 million or 43.9% in the first three months of 2017.

Net gain (loss) on other real estate owned and other assets increased $0.4 million or 444.7% as compared to the first quarter of 2017 primarily due to an increase in value of $0.2 million of a venture capital investment.

Swap fee and valuation income decreased $0.2 million compared to the first three months of 2017 primarily due to the change in the valuation of the interest rate swaps and lower new swap volume.

Other income decreased $0.6 million or 45.8% compared to the first three months of 2017 primarily due to a $0.4 million gain on the sale of certain real estate-related joint venture assets acquired from ESB recognized in the first quarter of 2017. WesBanco is currently in the process of winding up and dissolving its business activities of these acquired joint ventures.

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NON-INTEREST EXPENSE

TABLE 5. NON-INTEREST EXPENSE

	For the Three Months Ended March 31,
(unaudited, dollars in thousands)	2018		2017		$ Change			% Change
Salaries and wages	$	25,006	$	23,002	$	2,004			8.7
Employee benefits		6,912		8,210		(1,298	)		(15.8	)
Net occupancy		4,656		4,327		329			7.6
Equipment		3,949		4,042		(93	)		(2.3	)
Marketing		1,116		824		292			35.4
FDIC insurance		658		827		(169	)		(20.4	)
Amortization of intangible assets		1,086		1,273		(187	)		(14.7	)
Restructuring and merger-related expenses		245		491		(246	)		(50.1	)
Franchise and other miscellaneous taxes		2,235		2,084		151			7.2
Consulting, regulatory, accounting and advisory fees		1,532		1,673		(141	)		(8.4	)
ATM and electronic banking interchange expenses		1,216		1,088		128			11.8
Postage and courier expenses		959		1,021		(62	)		(6.1	)
Legal fees		713		761		(48	)		(6.3	)
Communications		488		747		(259	)		(34.7	)
Supplies		687		828		(141	)		(17.0	)
Other real estate owned and foreclosure expenses		199		328		(129	)		(39.3	)
Other		2,914		2,858		56			2.0
Total non-interest expense	$	54,571	$	54,384	$	187			0.3

Non-interest expense in the first quarter of 2018 grew marginally by $0.2 million or 0.3% compared to the same quarter in 2017 in an effort to control operating expenses. Excluding merger-related expenses, non-interest expense increased $0.4 million or 0.8%. For the first quarter, salaries and wages increased $2.0 million, net occupancy increased $0.3 million, and marketing expense increased $0.3 million, offset by a $1.3 million decrease in employee benefits, a $0.3 million decrease in communications, coupled with decreases in various other expense categories.

Salaries and wages increased $2.0 million or 8.7% from the first quarter of 2017 due to the adoption of a new accounting standard, which requires the service component portion of pension expense to be classified to salaries and wages from employee benefits. The remaining increase is due to routine annual compensation adjustments and stock based compensation. Employee benefits expense decreased $1.3 million compared to the first quarter of 2017, primarily from the $0.7 reclassification of the service component portion of pension cost to salaries and wages. Pension costs excluding the service component decreased $0.3 million compared to the first quarter 2017. The fair value of certain executive deferred compensation benefits decreased $0.3 million as compared to the same period in 2017.

Net occupancy costs increased $0.3 million or 7.6% compared to the first three months of 2017, primarily due to increased building-related costs including utilities, lease expense, depreciation, repairs and other seasonal maintenance costs, such as snow removal.

Marketing expenses increased $0.3 million or 35.4% compared to the first three months of 2017. The increase is primarily due to advertising expense as new marketing campaigns began in 2018.

Merger-related expenses in 2018 relate to the FTSB acquisition that closed on April 5, 2018. The costs consist of primarily legal and other professional fees. The merger-related costs in 2017 related to the YCB acquisition, which closed on September 9, 2016.

Communications expense decreased $0.3 million or 34.7% compared to the first three months of 2017. WesBanco improved the technology and communications infrastructure at the former YCB-acquired branches, which further allowed for future cost savings as noted in the current period.

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INCOME TAXES

The provision for income taxes decreased $3.6 million or 34.1% in the first quarter of 2018 compared to the first quarter of 2017, due to the enacted Federal tax reform legislation that reduced the corporate federal income tax rate from 35% to 21% effective January 1, 2018. Partially offsetting this decrease in income tax expense, first quarter 2018 pre-tax income was 11.0% higher. As a result of these changes, the effective tax rate decreased to 17.28% compared to 29.09% in the first quarter of 2017.

FINANCIAL CONDITION

Total assets increased 4.4%, while deposits and shareholders’ equity increased 2.6% and 0.6%, respectively, compared to December 31, 2017. Total securities increased by $463.6 million or 20.3% from December 31, 2017 to March 31, 2018, and was driven by management’s strategy to exceed the $10 billion threshold in total assets during the first quarter of 2018 by purchasing taxable securities. These purchases had an average yield of approximately 3.06%. Total portfolio loans decreased $18.9 million or 0.3% as a result of targeted reductions in the consumer portfolio offsetting growth in strategic focus categories, coupled with increased secondary market residential mortgage loan sales. Deposits increased $182.7 million from year-end resulting from a 7.1% increase in demand deposits and a 3.5% increase in savings deposits, which more than offset the 3.9% decrease in money market deposits and the 5.4% decrease in certificates of deposit. The decrease in certificates of deposit is a result of periodically offering lower than median competitive rates for maturing certificates of deposit and customer preferences for other deposit types, coupled with a $30.8 million decrease in CDARS^® balances. The increase in demand deposits and savings deposits were attributable to marketing, incentives paid to customers, focused retail and business strategies to obtain more account relationships, and customers’ preference for short-term maturities, coupled with deposits from bonus and royalty payments for Marcellus and Utica shale gas payments from energy companies in WesBanco’s southwestern Pennsylvania, eastern Ohio and northern West Virginia markets. Total borrowings increased 18.6% during the first three months of 2018 as short-term borrowings increased $22.8 million and new FHLB borrowings exceeded maturities by $219.2 million. Proceeds from borrowings were utilized to purchase investment securities during the three months ended March 31, 2018. Total shareholders’ equity increased by approximately $8.0 million or 0.6%, compared to December 31, 2017, primarily due to net income exceeding dividends for the period by $20.8 million, which was partially offset by a $14.5 million other comprehensive loss.

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TABLE 6. COMPOSITION OF SECURITIES (1)

(unaudited, dollars in thousands)	March 31, 2018			December 31, 2017			$ Change			% Change
Equity securities (at fair value)	$	13,986		$	13,457		$	529			3.9
Available-for-sale debt securities (at fair value)
U.S. Treasury		9,894			—			9,894			100.0
U.S. Government sponsored entities and agencies		96,458			71,843			24,615			34.3
Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies		1,344,410			934,922			409,488			43.8
Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies		140,926			114,867			26,059			22.7
Obligations of states and political subdivisions		101,431			104,830			(3,399	)		(3.2	)
Corporate debt securities		35,258			35,403			(145	)		(0.4	)
Total available-for-sale debt securities	$	1,728,377		$	1,261,865		$	466,512			37.0
Held-to-maturity debt securities (at amortized cost)
U.S. Government sponsored entities and agencies	$	11,263		$	11,465		$	(202	)		(1.8	)
Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies		162,904			170,025			(7,121	)		(4.2	)
Obligations of states and political subdivisions		798,536			794,655			3,881			0.5
Corporate debt securities		33,339			33,355			(16	)		(0.0	)
Total held-to-maturity debt securities		1,006,042			1,009,500			(3,458	)		(0.3	)
Total securities	$	2,748,405		$	2,284,822		$	463,583			20.3
Available-for-sale and equity securities:
Weighted average yield at the respective period end (2)		2.57	%		2.35	%
As a % of total securities		63.4	%		55.8	%
Weighted average life (in years)		4.8			4.2
Held-to-maturity securities:
Weighted average yield at the respective period end (2)		3.42	%		3.85	%
As a % of total securities		36.6	%		44.2	%
Weighted average life (in years)		4.8			4.2
Total securities:
Weighted average yield at the respective period end (2)		2.88	%		3.01	%
As a % of total securities		100.0	%		100.0	%
Weighted average life (in years)		4.8			4.2

(1) At March 31, 2018 and December 31, 2017, there were no holdings of any one issuer, other than U.S. government sponsored entities and its agencies, in an amount greater than 10% of WesBanco’s shareholders’ equity.

(2) Weighted average yields have been calculated on a taxable-equivalent basis using the federal statutory tax rate of 21% in 2018 and 35% in 2017.

Total investment securities, which are a source of liquidity for WesBanco as well as a contributor to interest income, increased by $463.6 million or 20.3% from December 31, 2017 to March 31, 2018. Through the first three months of 2018, the available-for-sale portfolio increased by $466.5 million or 37.0%, while the held-to-maturity portfolio remained relatively unchanged. The increase in the overall portfolio from December 31, 2017 was driven by management’s strategy to exceed the $10 billion threshold in total assets during the first quarter of 2018 by purchasing mortgage-backed securities and collateralized mortgage obligations, with an average yield of approximately 3.06%. The weighted average yield of the portfolio decreased by 13 basis points from 3.01% at December 31, 2017 to 2.88% at March 31, 2018. Though market rates increased in the first quarter of 2018 on all securities purchased, the decrease in the corporate federal tax rate from 35% to 21% reduced the tax-equivalent yield by approximately 73 basis points on the tax-exempt municipal bond portfolio, and 16 basis points on the entire portfolio from year-end, as the tax benefit was reduced. This decrease in the tax-equivalent yield on tax-exempt municipals more than offset the general market rate increases, as tax-exempt municipals comprise approximately 25% of WesBanco’s investment portfolio. The higher-yielding first quarter purchases helped to mitigate the impact of the tax-equivalent yield reduction on the municipal bonds.

Net unrealized losses on available-for-sale securities included in accumulated other comprehensive income, net of tax, as of March 31, 2018 and December 31, 2017 were $29.2 million and $13.3 million, respectively. With approximately 37% of the investment portfolio in the held-to-maturity category, the recent volatility in interest rates does not have as much impact on other comprehensive income as if the entire portfolio were included in the category available-for-sale.

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Equity securities, of which a portion consist of investments in various mutual funds held in grantor trusts formed in connection with a key officer and director deferred compensation plan, are recorded at fair value. Gains and losses due to fair value fluctuations on equity securities are included in net securities gains or losses. For those equity securities relating to the key officer and director deferred compensation plan, the corresponding change in the obligation to the employee is recognized in employee benefits expense.

WesBanco’s municipal portfolio comprises 32.7% of the overall securities portfolio as of March 31, 2018 as compared to 39.4% as of December 31, 2017, and it carries different risks that are not as prevalent in other security types contained in the portfolio. The following table presents the allocation of the municipal bond portfolio based on the combined S&P and Moody’s ratings of the individual bonds (at fair value):

TABLE 7. MUNICIPAL BOND RATINGS

	March 31, 2018				December 31, 2017
(unaudited, dollars in thousands)	Amount		% of Total		Amount		% of Total
Municipal bonds (at fair value) (1):
Moody’s: Aaa / S&P: AAA	$	99,976		11.1	$	96,253		10.5
Moody’s: Aa1 ; Aa2 ; Aa3 / S&P: AA+ ; AA ; AA-		673,666		74.4		685,446		74.9
Moody’s: A1 ; A2 ; A3 / S&P: A+ ; A ; A-		122,043		13.5		125,032		13.7
Moody’s: Baa1 ; Baa2 ; Baa3 / S&P: BBB+ ; BBB ; BBB- (2)		1,035		0.1		745		0.1
Not rated by either agency		7,919		0.9		7,764		0.8
Total municipal bond portfolio	$	904,639		100.0	$	915,240		100.0

(1) The highest available rating was used when placing the bond into a category in the table.

(2) As of March 31, 2018 and December 31, 2017, there are no securities in the municipal portfolio rated below investment grade.

WesBanco’s municipal bond portfolio consists of both taxable (primarily Build America Bonds) and tax-exempt general obligation and revenue bonds. The following table presents additional information regarding the municipal bond type and issuer (at fair value):

TABLE 8. COMPOSITION OF MUNICIPAL SECURITIES

	March 31, 2018				December 31, 2017
(unaudited, dollars in thousands)	Amount		% of Total		Amount		% of Total
Municipal bond type:
General Obligation	$	622,511		68.8	$	630,824		68.9
Revenue		282,128		31.2		284,416		31.1
Total municipal bond portfolio	$	904,639		100.0	$	915,240		100.0
Municipal bond issuer:
State Issued	$	93,002		10.3	$	95,160		10.4
Local Issued		811,637		89.7		820,080		89.6
Total municipal bond portfolio	$	904,639		100.0	$	915,240		100.0

WesBanco’s municipal bond portfolio is broadly spread across the United States. The following table presents the top five states of municipal bond concentration based on total fair value at March 31, 2018:

TABLE 9. CONCENTRATION OF MUNICIPAL SECURITIES

	March 31, 2018
(unaudited, dollars in thousands)	Fair Value		% of Total
Pennsylvania	$	192,508		21.3
Texas		103,670		11.5
Ohio		101,493		11.2
Illinois		46,457		5.1
West Virginia		34,379		3.8
All other states		426,132		47.1
Total municipal bond portfolio	$	904,639		100.0

WesBanco uses prices from independent pricing services and, to a lesser extent, indicative (non-binding) quotes from independent brokers, to measure the fair value of its securities. WesBanco validates prices received from pricing services or brokers using a variety of methods, including, but not limited to, comparison to secondary pricing services, corroboration of pricing by reference to other independent market data such as

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secondary broker quotes and relevant benchmark indices, review of pricing by personnel familiar with market liquidity and other market-related conditions, review of pricing service methodologies, review of independent auditor reports received from the pricing service regarding its internal controls, and through review of inputs and assumptions used in pricing certain securities thinly traded or with limited observable data points. The procedures in place provide management with a sufficient understanding of the valuation models, assumptions, inputs and pricing to reasonably measure the fair value of WesBanco’s securities. For additional disclosure relating to fair value measurements, refer to Note 7, “Fair Value Measurement” in the Consolidated Financial Statements.

LOANS AND CREDIT RISK

Loans represent WesBanco’s single largest balance sheet asset classification and the largest source of interest income. Business purpose loans consist of commercial real estate (“CRE”) loans and other commercial and industrial (“C&I”) loans that are not secured by real estate. CRE loans are further segmented into land and construction loans, and loans for improved property. Consumer purpose loans consist of residential real estate loans, home equity lines of credit and other consumer loans. Loans held for sale generally consist of residential real estate loans originated for sale in the secondary market, but at times may also include other types of loans. The outstanding balance of each major category of the loan portfolio is summarized in Table 10.

The risk that borrowers will be unable or unwilling to repay their obligations and default on loans is inherent in all lending activities. Credit risk arises from many sources including general economic conditions, external events that impact businesses or industries, isolated events that impact a major employer, individual loss of employment or other personal hardships as well as changes in interest rates or the value of collateral. Credit risk is also impacted by a concentration of exposure within a geographic market or to one or more borrowers, industries or collateral types. The primary goal in managing credit risk is to minimize the impact of default by an individual borrower or group of borrowers. Credit risk is managed through the initial underwriting process as well as through ongoing monitoring and administration of the portfolio that varies by the type of loan. The Bank’s credit policies establish standard underwriting guidelines for each type of loan and require an appropriate evaluation of the credit characteristics of each borrower. This evaluation includes the borrower’s primary source of repayment capacity; the adequacy of collateral, if any, to secure the loan; the potential value of personal guarantees as secondary sources of repayment; and other factors unique to each loan that may increase or mitigate its risk. Credit bureau scores are also considered when evaluating consumer purpose loans as well as guarantors of business purpose loans. However, the Bank does not periodically update credit bureau scores subsequent to when loans are made to determine changes in credit history.

Credit risk is mitigated for all types of loans by continuously monitoring delinquency levels and pursuing collection efforts at the earliest stage of delinquency. The Bank also monitors general economic conditions, including employment, housing activity and real estate values in its market. The Bank also periodically evaluates and changes its underwriting standards when warranted based on market conditions, the historical performance of a category of the portfolio, or other external factors. Credit risk is also regularly evaluated for the impact of adverse economic and other events that increase the risk of default and the potential loss in the event of default to understand their impact on the Bank’s earnings and capital.

TABLE 10. COMPOSITION OF LOANS (1)

	March 31, 2018				December 31, 2017
(unaudited, dollars in thousands)	Amount		% of Loans		Amount		% of Loans
Commercial real estate:
Land and construction	$	440,896		7.0	$	392,597		6.2
Improved property		2,574,330		40.6		2,601,851		40.9
Total commercial real estate		3,015,226		47.6		2,994,448		47.1
Commercial and industrial		1,118,333		17.7		1,125,327		17.7
Residential real estate		1,345,993		21.2		1,353,301		21.3
Home equity		523,425		8.3		529,196		8.3
Consumer		319,561		5.0		339,169		5.3
Total portfolio loans		6,322,538		99.8		6,341,441		99.7
Loans held for sale		12,962		0.2		20,320		0.3
Total loans	$	6,335,500		100.0	$	6,361,761		100.0

(1) Loans are presented gross of the allowance for loan losses and net of unearned income, credit valuation adjustments, and unamortized net deferred loan fee income and loan origination costs.

Total loans decreased $26.3 million or 0.4% from December 31, 2017 while portfolio loans increased $10.4 million or 0.2% over the last twelve months. Total loan growth over the last twelve months was driven by strategic focus categories with 1.8% growth in total commercial loans and 3.0% growth in home equity loans, from expanded market areas and additional commercial personnel in our core markets. Secondary market loan sales of residential mortgages continued to increase resulting in an increase in the gain on sale of mortgages and a reduction in residential mortgages retained in the portfolio. In addition, the consumer portfolio declined due to a reduced focus and pricing adjustments for indirect installment loans.

Total loan commitments of $2.0 billion, including loans approved but not closed, increased $123.2 million or 6.6% from December 31, 2017 due primarily to loans approved but not closed. The line utilization percentage for the commercial portfolio was 47.7% at March 31, 2018 and 48.0% at December 31, 2017.

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The commercial portfolio is monitored for potential concentrations of credit risk by market, type of lending, CRE property type, C&I and owner-occupied CRE by industry, investment CRE dependence on common tenants and industries or property types that are similarly impacted by external factors.

At March 31, 2018 total exposure to core energy industries such as drilling, extraction, pipeline construction, mining equipment, investment real estate with energy-related tenants and other related support activities approximated $50.0 million or 0.63% of the total loan portfolio as compared to $55.2 million or 0.69% of the total loan portfolio at December 31, 2017. Exposure to ancillary industries such as utility distribution and transportation, engineering services, manufacturers and retailers of other heavy equipment used in core energy industries, approximates an additional $60.9 million in exposure or 0.76% of the total loan portfolio as compared to $65.3 million or 0.82% of the total loan portfolio at December 31, 2017. The largest exposure to any one borrower in either core energy or ancillary industries was $21.0 million to a company that operates as a natural gas distribution utility.

NON-PERFORMING ASSETS, IMPAIRED LOANS AND LOANS PAST DUE 90 DAYS OR MORE

Non-performing assets consist of non-accrual loans and TDRs, other real estate acquired through or in lieu of foreclosure, bank premises held for sale, and repossessed automobiles acquired to satisfy defaulted consumer loans.

TABLE 11. NON-PERFORMING ASSETS

(unaudited, dollars in thousands)	March 31, 2018			December 31, 2017
Non-accrual loans:
Commercial real estate - land and construction	$	800		$	239
Commercial real estate - improved property		10,821			13,318
Commercial and industrial		2,373			2,958
Residential real estate		13,149			14,661
Home equity		4,540			4,762
Consumer		703			887
Total non-accrual loans (1)		32,386			36,825
TDRs accruing interest:
Commercial real estate - land and construction		—			—
Commercial real estate - improved property		1,602			1,650
Commercial and industrial		123			128
Residential real estate		4,602			4,321
Home equity		431			407
Consumer		100			65
Total TDRs accruing interest (1)		6,858			6,571
Total non-performing loans	$	39,244		$	43,396
Other real estate owned and repossessed assets		4,067			5,297
Total non-performing assets	$	43,311		$	48,693
Non-performing loans/total portfolio loans		0.62	%		0.68	%
Non-performing assets/total assets		0.42	%		0.50	%
Non-performing assets/total portfolio loans, other real estate and repossessed assets		0.68	%		0.77	%

(1) TDRs on nonaccrual of $2.4 million and $2.9 million at March 31, 2018 and December 31, 2017, respectively, are included in total nonaccrual loans.

Non-performing loans, which consist of non-accrual loans and TDRs, decreased $4.2 million or 9.6%, from December 31, 2017, primarily due to the paydown of one large CRE loan in the first quarter. TDRs increased slightly by $0.3 million due to additions to the category being slightly higher than normal repayments. (Please see the Notes to the Consolidated Financial Statements for additional discussion.)

Other real estate owned and repossessed assets decreased $1.2 million from December 31, 2017 primarily due to continued efforts to liquidate properties.

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The following table presents past due and accruing loans excluding non-accrual and TDRs:

TABLE 12. PAST DUE AND ACCRUING LOANS EXCLUDING NON-ACCRUAL AND TDRs

(unaudited, dollars in thousands)	March 31, 2018			December 31, 2017
Loans past due 90 days or more:
Commercial real estate - land and construction	$	172		$	—
Commercial real estate - improved property		364			243
Commercial and industrial		21			20
Residential real estate		561			1,113
Home equity		251			742
Consumer		210			608
Total loans past due 90 days or more		1,579			2,726
Loans past due 30 to 89 days:
Commercial real estate - land and construction		—			172
Commercial real estate - improved property		4,727			316
Commercial and industrial		684			721
Residential real estate		3,987			4,392
Home equity		2,765			2,281
Consumer		2,373			3,290
Total loans past due 30 to 89 days		14,536			11,172
Total 30 days or more	$	16,115		$	13,898
Loans past due 90 days or more and accruing to total portfolio loans		0.02	%		0.04	%
Loans past due 30-89 days and accruing to total portfolio loans		0.23	%		0.18	%

Loans past due 30 days or more and accruing interest excluding non-accruals and TDRs increased $2.2 million or 16.0% from December 31, 2017. These loans continue to accrue interest because they are both well-secured and in the process of collection. The increase in the 30 to 89 days past due status was primarily due to a $4.4 million increase in the commercial real estate category and represented 0.23% of total loans at March 31, 2018 and 0.18% at December 31, 2017. Loans past due 90 days or more decreased $1.1 million compared to December 31, 2017 and represented 0.02% of total loans at March 31, 2018 compared to 0.04% at December 31, 2017. The continued low levels of delinquency are the result of management’s continued focus on sound initial underwriting, timely collection of loans at their earliest stage of delinquency, stable unemployment and generally improved economic conditions.

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ALLOWANCE FOR CREDIT LOSSES

The allowance for loan losses of $46.3 million represented 0.73% of total portfolio loans at March 31, 2018 compared to 0.71% as of December 31, 2017 and 0.70% as of March 31, 2017. Included in the ratio are acquired YCB and ESB loans (recorded at fair value at the date of acquisition of $1.7 billion) and the related allowance on YCB and ESB acquired loans of $3.2 million at March 31, 2018. Excluding these acquired loans and the related allowance results in a more comparable coverage ratio to prior periods.

The allowance for loans individually-evaluated remained unchanged from December 31, 2017 to March 31, 2018 at $0.4 million. The allowance for loans collectively-evaluated increased from December 31, 2017 to March 31, 2018 by $1.1 million.

The allowance for loan commitments of $0.6 million at March 31, 2018 was unchanged compared to December 31, 2017, and is included in other liabilities on the Consolidated Balance Sheets.

The allowance for credit losses by loan category, presented in Note 4 “Loans and the Allowance for Credit Losses” to the Consolidated Financial Statements, summarizes the impact of changes in various factors that affect the allowance for loan losses in each segment of the portfolio. The allowance for all segments is impacted by changes in loan balances, as well as changes in historical loss rates adjusted for qualitative factors such as economic conditions. The CRE and C&I segments of the portfolio are also impacted by changes in the risk grading distribution of the portfolio as well as the migration of CRE loans from land and construction to improved property upon the completion of construction.

The loss migration rate by internal risk grade is the primary factor for establishing the allowance for all commercial loans, and the portfolio segment loss history is the primary factor for establishing the allowance for residential real estate, home equity and consumer loans. The categorization of loans as non-performing is not as significant a factor as the loss migration rate by risk grade or the segment loss history, although certain non-performing loans that carry specific reserves are also typically considered classified under the internal risk grading system. Criticized and classified loans were 1.08% of total loans, improving from 1.35% at March 31, 2017. Criticized and classified loans as a percent of total loans improved as overall credit quality continued to improve, enabling certain loans to be upgraded while others have paid down. Criticized and classified loans decreased $5.6 million from December 31, 2017 to $68.4 million at March 31, 2018, with the paydown and/or upgrade of several large CRE loans.

Table 13 summarizes the allocation of the allowance for credit losses to each category of the loan portfolio. The increase in the allowance for commercial loans from December 31, 2017 is primarily due to loan growth in the CRE—land and construction category, while the overall allowance for retail loan categories was relatively unchanged.

TABLE 13. ALLOCATION OF THE ALLOWANCE FOR CREDIT LOSSES

(unaudited, dollars in thousands)	March 31, 2018		Percent of Total		December 31, 2017		Percent of Total
Allowance for loan losses:
Commercial real estate - land and construction	$	4,324		9.2	$	3,117		6.8
Commercial real estate - improved property		20,279		43.2		21,166		46.2
Commercial and industrial		10,494		22.4		9,414		20.5
Residential real estate		3,252		6.9		3,206		7.0
Home equity		4,303		9.2		4,497		9.8
Consumer		3,067		6.5		3,063		6.7
Deposit account overdrafts		615		1.3		821		1.6
Total allowance for loan losses	$	46,334		98.7	$	45,284		98.6
Allowance for loan commitments:
Commercial real estate - land and construction	$	176		0.4	$	119		0.3
Commercial real estate - improved property		21		0.0		26		0.1
Commercial and industrial		176		0.4		173		0.4
Residential real estate		7		0.0		7		0.0
Home equity		208		0.4		212		0.5
Consumer		41		0.1		37		0.1
Total allowance for loan commitments		629		1.3		574		1.4
Total allowance for credit losses	$	46,963		100.0	$	45,858		100.0

Although the allowance for credit losses is allocated as described in Table 13, the total allowance is available to absorb actual losses in any category of the loan portfolio. However, differences between management’s estimation of probable losses and actual incurred losses in subsequent periods for any category may necessitate future adjustments to the provision for loan losses applicable to the category. Management believes the allowance for credit losses is appropriate to absorb probable losses at March 31, 2018.

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DEPOSITS

TABLE 14. DEPOSITS

(unaudited, dollars in thousands)	March 31, 2018		December 31, 2017		$ Change			% Change
Deposits
Non-interest bearing demand	$	1,950,619	$	1,846,748	$	103,871			5.6
Interest bearing demand		1,768,977		1,625,015		143,962			8.9
Money market		984,429		1,024,856		(40,427	)		(3.9	)
Savings deposits		1,314,632		1,269,912		44,720			3.5
Certificates of deposit		1,207,669		1,277,057		(69,388	)		(5.4	)
Total deposits	$	7,226,326	$	7,043,588	$	182,738			2.6

Deposits, which represent WesBanco’s primary source of funds, are offered in various account forms at various rates through WesBanco’s 172 financial centers. The FDIC insures deposits up to $250,000 per account.

Total deposits increased by $182.7 million or 2.6% during the first three months of 2018. Interest bearing demand, non-interest bearing demand, and savings deposits increased 8.9%, 5.6%, and 3.5%, respectively, which more than offset the 3.9% decrease in money market deposits. This net growth is primarily attributable to marketing, customer incentives, focused retail and business strategies to obtain more account relationships and customers’ preferences for shorter-term maturities, coupled with deposits from bonus and royalty payments for Marcellus and Utica shale gas payments from energy companies in WesBanco’s southwestern Pennsylvania, eastern Ohio and northern West Virginia markets. Money market deposits were influenced through WesBanco’s participation in the Insured Cash Sweep (ICS^®) money market deposit program. ICS^® reciprocal balances totaled $63.1 million at March 31, 2018 compared to $65.9 million at December 31, 2017.

Certificates of deposit decreased $69.4 million due primarily to the effects of an overall corporate strategy designed to increase and remix retail deposit relationships with a focus on overall products that can be offered at a lower cost to WesBanco. The decline was also impacted by lower offered rates on maturing certificates of deposit and customer preferences for other non-maturity deposit types. WesBanco does not generally solicit brokered or other deposits out-of-market or over the internet, but does participate in the Certificate of Deposit Account Registry Services (CDARS^®) program and the Insured Cash Sweep (ICS^®) money market deposit program. CDARS^® balances totaled $74.2 million in outstanding balances at March 31, 2018, of which $54.3 million represented one-way buys, compared to $105.0 million in total outstanding balances at December 31, 2017, of which $72.7 million represented one-way buys. Certificates of deposit greater than $250,000 were approximately $208.0 million at March 31, 2018 compared to $216.4 million at December 31, 2017. Certificates of deposit of $100,000 or more were approximately $532.8 million at March 31, 2018 compared to $581.6 million at December 31, 2017. Certificates of deposit totaling approximately $694.4 million at March 31, 2018 with a cost of 0.76% are scheduled to mature within the next 12 months. WesBanco intends to continue to focus on its core deposit strategies and improving its overall mix of transaction accounts to total deposits. From time to time, the Bank may offer special promotions or match competitor rates on certain certificates of deposit maturities and savings products based on competition, sales strategies, liquidity needs and wholesale borrowing costs.

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BORROWINGS

TABLE 15. BORROWINGS

(unaudited, dollars in thousands)	March 31, 2018		December 31, 2017		$ Change		% Change
Federal Home Loan Bank Borrowings	$	1,166,939	$	948,203	$	218,736		23.1
Other short-term borrowings		207,653		184,805		22,848		12.4
Subordinated debt and junior subordinated debt		164,379		164,327		52		0.0
Total	$	1,538,971	$	1,297,335	$	241,636		18.6

While borrowings are a significant source of funding for WesBanco, they are less significant as compared to total deposits. During the first quarter of 2018, FHLB borrowings increased $218.7 million, as $375.0 million advances offset $155.8 million in maturities. In addition, WesBanco extended the maturities of approximately $155.0 million of maturing FHLB borrowings in the first quarter with a prior cost of approximately 1.29%, at current short-term FHLB rates approximating 2.43% - 2.75%.

Other short-term borrowings, which consist of securities sold under agreements to repurchase and federal funds purchased at March 31, 2018, but may also include notes payable, were $207.7 million at March 31, 2018 compared to $184.8 million at December 31, 2017. The increase is primarily due to a $27.8 million increase in securities sold under agreements to repurchase, which was partially offset by the repayments of $5.0 million in federal funds purchased outstanding at December 31, 2017. WesBanco has a revolving line of credit, which is a senior obligation of the parent company, with another financial institution. This line of credit, which accrues interest at an adjusted LIBOR rate, provides for aggregate unsecured borrowings of up to $25.0 million. There was no outstanding balance at March 31, 2018 or December 31, 2017. Rates have generally increased over the past year on all borrowing types due to the federal funds and LIBOR rate increases that have occurred since early 2017.

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OFF-BALANCE SHEET ARRANGEMENTS

WesBanco enters into financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit, letters of credit, loans approved but not closed, overdraft limits and contingent obligations to purchase loans funded by other entities. Since many of these commitments expire unused or partially used, these commitments may not reflect future cash requirements. Please refer to Note 10, “Commitments and Contingent Liabilities,” of the Consolidated Financial Statements and the “Loans and Credit Risk” section of this MD&A for additional information.

CAPITAL RESOURCES

Shareholders’ equity increased $7.7 million or 0.6% from $1.4 billion at December 31, 2017. The increase resulted primarily from net income during the current three-month period of $33.5 million, which was partially offset by $14.5 million other comprehensive loss and the declaration of common shareholder dividends totaling $12.8 million for the three months ended March 31, 2018. WesBanco also increased its quarterly dividend rate to $0.29 per share in February, representing an 11.5% increase over the prior quarterly rate and a cumulative 107% increase since 2010.

WesBanco did not purchase any shares during the three-month period ended March 31, 2018 under the current share repurchase plans. At March 31, 2018, the remaining shares authorized to be purchased under the current repurchase plans totaled 1,107,297 shares.

On February 22, 2018, WesBanco granted 12,000 Total Shareholder Return Plan (“TSR”) shares for the performance period beginning January 1, 2018 and ending December 31, 2020 to certain executives. The award is determined at the end of the three-year period if the TSR of WesBanco common stock is equal to or greater than the 50^th percentile of the TSR of the peer group. The number of shares to be earned by the participant shall be 200% of the grant-date award if the TSR of WesBanco common stock is equal to or greater than the 75^th percentile of the TSR of the peer group. Upon achieving the market-based metric, shares determined to be earned by the participant become time-based and vest in three equal annual installments.

Regulatory guidelines require bank holding companies and commercial banks to maintain certain minimum capital ratios and define companies as “well capitalized” that sufficiently exceed the minimum ratios. At March 31, 2018, regulatory capital levels for both the Bank and WesBanco were substantially greater than the minimum amounts needed to be considered “well capitalized” under the regulations. There are various legal limitations under federal and state laws that limit the payment of dividends from the Bank to WesBanco. As of March 31, 2018, under FDIC regulations, WesBanco could receive, without prior regulatory approval, a dividend of approximately $51.9 million from the Bank. WesBanco intends to continue to improve its consolidated and Bank capital ratios as necessary over time, primarily from retaining a majority of its increasing earnings.

The following table summarizes risk-based capital amounts and ratios for WesBanco and the Bank for the periods indicated:

							March 31, 2018							December 31, 2017
(unaudited, dollars in thousands)	Minimum Value (1)			Well Capitalized (2)			Amount		Ratio			Minimum Amount (1)		Amount		Ratio			Minimum Amount (1)
WesBanco, Inc.
Tier 1 leverage		4.00	%		5.00	%	$	997,327		10.56	%	$	377,827	$	970,425		10.39	%	$	373,566
Common equity Tier 1		4.50	%		6.50	%		859,327		12.33	%		313,611		834,554		12.14	%		309,298
Tier 1 capital to risk-weighted assets		6.00	%		8.00	%		997,327		14.31	%		418,148		970,425		14.12	%		412,397
Total capital to risk-weighted assets		8.00	%		10.00	%		1,069,510		15.35	%		557,530		1,042,124		15.16	%		549,863
WesBanco Bank, Inc.
Tier 1 leverage		4.00	%		5.00	%	$	887,798		9.42	%	$	377,142	$	869,227		9.32	%	$	372,900
Common equity Tier 1		4.50	%		6.50	%		887,798		12.75	%		313,273		869,227		12.66	%		308,900
Tier 1 capital to risk-weighted assets		6.00	%		8.00	%		887,798		12.75	%		417,698		869,227		12.66	%		411,866
Total capital to risk-weighted assets		8.00	%		10.00	%		959,981		13.79	%		556,930		940,303		13.70	%		549,155

(1) Minimum requirements to remain adequately capitalized.

(2) Well-capitalized under prompt corrective action regulations.

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LIQUIDITY RISK

Liquidity is defined as a financial institution’s capacity to meet its cash and collateral obligations at a reasonable cost. Liquidity risk is the risk that an institution’s financial condition or overall safety and soundness is adversely affected by an inability, or perceived inability, to meet its obligations. An institution’s obligations, and the funding sources to meet them, depend significantly on its business mix, balance sheet structure and the cash flows of its on- and off-balance sheet obligations. Institutions confront various internal and external situations that can give rise to increased liquidity risk including funding mismatches, market constraints on funding sources, contingent liquidity events, changes in economic conditions, and exposure to credit, market, operation, legal and reputation risk. WesBanco actively manages liquidity risk through its ability to provide adequate funds to meet changes in loan demand, unexpected outflows in deposits and other borrowings as well as to take advantage of market opportunities and meet operating cash needs. This is accomplished by maintaining liquid assets in the form of securities, sufficient borrowing capacity and a stable core deposit base. Liquidity is centrally monitored by WesBanco’s Asset/Liability Committee (“ALCO”).

WesBanco determines the degree of required liquidity by the relationship of total holdings of liquid assets to the possible need for funds to meet unexpected deposit losses and/or loan demands. The ability to quickly convert assets to cash at a minimal loss is a primary function of WesBanco’s investment portfolio management. WesBanco believes its cash flow from the loan portfolio, the investment portfolio and other sources adequately meet its liquidity requirements. WesBanco’s net loans to assets ratio was 61.3% at March 31, 2018 and deposit balances funded 70.5% of assets.

The following table lists the sources of liquidity from assets at March 31, 2018 expected within the next year:

(unaudited, in thousands)
Cash and cash equivalents	$	100,845
Securities with a maturity date within the next year and callable securities		199,244
Projected payments and prepayments on mortgage-backed securities and collateralized mortgage obligations (1)		208,799
Loans held for sale		12,962
Accruing loans scheduled to mature		914,959
Normal loan repayments		1,041,516
Total sources of liquidity expected within the next year	$	2,478,325

(1) Projected prepayments are based on current prepayment speeds.

Deposit flows are another principal factor affecting overall WesBanco liquidity. Deposits totaled $7.2 billion at March 31, 2018. Deposit flows are impacted by current interest rates, products and rates offered by WesBanco versus various forms of competition, as well as customer behavior. Certificates of deposit scheduled to mature within one year totaled $694.4 million at March 31, 2018, which includes jumbo regular certificates of deposit totaling $292.5 million with a weighted-average cost of 1.06%, and jumbo CDARS^® deposits of $48.3 million with a weighted-average cost of 1.20%.

WesBanco maintains a line of credit with the FHLB as an additional funding source. Available credit with the FHLB at March 31, 2018 and December 31, 2017 approximated $1.6 billion and $1.8 billion, respectively. The FHLB requires securities to be specifically pledged to the FHLB and maintained in a FHLB-approved custodial arrangement if the member wishes to include such securities in the maximum borrowing capacity calculation. WesBanco has elected not to specifically pledge to the FHLB otherwise unpledged securities. At March 31, 2018, the Bank had unpledged available-for-sale securities with an amortized cost of $516.9 million. A portion of these securities could be sold for additional liquidity, or such securities could be pledged to secure additional FHLB borrowings. Available liquidity through the sale of available-for-sale investment securities is limited to approximately 30.1% of the portfolio which is unpledged, due to the pledging agreements that WesBanco has with their public deposit customers. Public deposit balances have increased significantly through the ESB and YCB acquisitions in the past three years. WesBanco’s held-to-maturity portfolio currently contains $654.5 million of unpledged securities. However, most of the balance represents municipal bonds, which can only be pledged in limited circumstances. Unless in compliance with certain criteria, these securities cannot be sold without tainting the remainder of the held-to-maturity portfolio. If tainting occurs, all remaining securities with the held-to-maturity designation would be required to move to available-for-sale, and the held-to-maturity designation would not be available to WesBanco for some time.

WesBanco participates in the Federal Reserve Bank’s Borrower-in-Custody Program (“BIC”) whereby WesBanco pledges certain consumer loans as collateral for borrowings. At March 31, 2018, WesBanco had a BIC line of credit totaling $187.6 million, none of which was outstanding. Alternative funding sources may include the utilization of existing overnight lines of credit with third party banks totaling $285.0 million, of which $20.0 million was outstanding at March 31, 2018, along with seeking other lines of credit, borrowings under repurchase agreement lines, increasing deposit rates to attract additional funds, accessing brokered deposits, or selling securities available-for-sale or certain types of loans.

Other short-term borrowings of $207.7 million at March 31, 2018 consisted of callable repurchase agreements, overnight sweep checking accounts for large commercial customers, and federal funds purchased. There has not been a significant fluctuation in the average deposit balances of the overnight sweep checking accounts during 2018. The overnight sweep checking accounts require U.S. Government securities to be pledged equal to or greater than the average deposit balance in the related customer accounts.

The principal sources of parent company liquidity are dividends from the Bank, $84.7 million in cash and investments on hand, and a $25.0 million revolving line of credit with another bank, which did not have an outstanding balance at March 31, 2018. WesBanco is in compliance with all loan covenants. There are various legal limitations under federal and state laws that limit the payment of dividends from the Bank to the parent company. As of March 31, 2018, under FDIC and State of West Virginia regulations, WesBanco could receive, without prior regulatory approval, dividends of approximately $51.9 million from the Bank. Management believes these are appropriate levels of cash for WesBanco given the current environment. Management continuously monitors the adequacy of parent company cash levels and sources of liquidity through the use of metrics that relate current cash levels to historical and forecasted cash inflows and outflows.

46

WesBanco had outstanding commitments to extend credit in the ordinary course of business approximating $1.9 billion and $1.8 billion at March 31, 2018 and December 31, 2017, respectively. On a historical basis, only a small portion of these commitments will result in an outflow of funds. Please refer to Note 10, “Commitments and Contingent Liabilities,” of the Consolidated Financial Statements and the “Loans and Loan Commitments” section of this MD&A for additional information.

Federal financial regulatory agencies previously have issued guidance to provide for sound practices for managing funding and liquidity risk and strengthening liquidity risk management practices. WesBanco maintains a comprehensive management process for identifying, measuring, monitoring, and controlling liquidity risk, which is fully integrated into its risk management process. Management believes WesBanco has sufficient current liquidity to meet current obligations to borrowers, depositors and others as of March 31, 2018 and that WesBanco’s current liquidity risk management policies and procedures adequately address this guidance.

47

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

The disclosures set forth in this item are qualified by the section captioned “Forward-Looking Statements” included in Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations of this report.

MARKET RISK

The primary objective of WesBanco’s ALCO is to maximize net interest income within established policy parameters. This objective is accomplished through the management of balance sheet composition, market risk exposures arising from changing economic conditions and liquidity risk.

Market risk is defined as the risk of loss due to adverse changes in the fair value of financial instruments resulting from fluctuations in interest rates and equity prices. Management considers interest rate risk to be WesBanco’s most significant market risk. Interest rate risk is the exposure to adverse changes in net interest income due to changes in interest rates. The relative consistency of WesBanco’s net interest income is largely dependent on effective management of interest rate risk. As interest rates change in the market, rates earned on interest rate sensitive assets and rates paid on interest rate sensitive liabilities do not necessarily move concurrently. Differing rate sensitivities may arise because fixed rate assets and liabilities may not have the same maturities, or because variable rate assets and liabilities differ in the timing and/or the percentage of rate changes.

WesBanco’s ALCO is a Board-level committee with Board and executive management representation, including the Chief Executive Officer, Chief Financial Officer, Chief Risk Management Officer and Senior Treasury Officer. It is responsible for monitoring and managing interest rate risk within Board-approved policy limits. Interest rate risk is monitored through the use of an earnings sensitivity simulation model and an economic value-at-risk model, measuring the fair value of net equity. These models are highly dependent on various assumptions, which change regularly as the balance sheet and market interest rates change. The key assumptions and strategies employed are analyzed and reviewed quarterly by the ALCO, while appropriate documentation is maintained.

The earnings sensitivity simulation model projects changes in net interest income resulting from the effect of changes in interest rates. Forecasting changes in net interest income requires management to make certain assumptions regarding loan and security prepayment rates, security call dates, changes to various non-maturity deposit product betas, and non-maturity deposit decay rates, which may not necessarily reflect the manner in which actual cash flows, yields, and costs respond to changes in market interest rates. Assumptions used are based on historical experience, current market rates and economic forecasts, and are periodically back-tested and reviewed by third-party consultants. The net interest income sensitivity results presented in Table 1, “Net Interest Income Sensitivity,” assumes that the balance sheet composition of interest sensitive assets and liabilities existing at the end of the period remains constant over the period being measured, and also assumes that a particular change in interest rates is reflected uniformly across the yield curve, regardless of the duration of the maturity or re-pricing of specific assets and liabilities. Since the assumptions used in the model relative to changes in interest rates are uncertain, the simulation analysis may not be indicative of actual results. In addition, this analysis does not consider all actions that management might employ in response to changes in interest rates as well as earning asset and costing liability balances.

Management is aware of the significant effect inflation or deflation has upon interest rates and ultimately upon financial performance. WesBanco’s ability to cope with inflation or deflation is best determined by analyzing its capability to respond to changing market interest rates, as well as its ability to manage the various elements of non-interest income and expense during periods of increasing or decreasing inflation or deflation. WesBanco monitors the level and mix of interest-rate sensitive assets and liabilities through ALCO in order to reduce the impact of inflation or deflation on net interest income. Management also controls the effects of inflation or deflation by conducting periodic reviews of the prices and terms of its various products and services, both in terms of the costs to offer the services as well as outside market influences upon such pricing, by introducing new products and services or reducing the availability of existing products and services, and by controlling overhead expenses.

Interest rate risk policy limits are determined by measuring the anticipated change in net interest income over a twelve-month period, assuming immediate and sustained market interest rate increases and decreases of 100 - 400 basis points across the entire yield curve, compared to a stable rate environment or base model. WesBanco’s current policy limits this exposure for the noted interest rate changes to a reduction of between 10% - 20% or less of net interest income from the stable rate base model over a twelve-month period. The table below shows WesBanco’s interest rate sensitivity at March 31, 2018 and December 31, 2017, assuming the above-noted interest rate increases as compared to a base model. In the current lower interest rate environment, particularly for short-term rates, the 200 and 300 basis point decreasing change are not shown due to the unrealistic nature of results associated with short-term negative rates.

48

TABLE 1. NET INTEREST INCOME SENSITIVITY

Immediate Change in Interest Rates         (basis points)	Percentage Change in Net Interest Income from Base over One Year		ALCO Guidelines
	March 31, 2018	December 31, 2017
+400	9.0%	8.3%	(20.0%)
+300	7.0%	6.2%	(15.0%)
+200	4.5%	4.0%	(12.5%)
+100	2.4%	2.4%	(10.0%)
-100	(2.7%)	(3.0%)	(10.0%)

As per the table above, the earnings sensitivity simulation model at March 31, 2018 currently projects that net interest income for the next twelve-month period would decrease by 2.7% if interest rates were to fall immediately by 100 basis points, compared to a decrease of 3.0% for the same scenario as of December 31, 2017.

For rising rate scenarios, net interest income would increase by between 2.4% - 9.0% if rates were to increase by between 100 - 400 basis points as of March 31, 2018, compared to increases of between 2.4% - 8.3% in a 100 - 400 basis point increasing rate environment as of December 31, 2017. If rates were to increase over a one-year period instead of an instantaneous shock, which management feels is a more practical scenario, than for a 200 basis point increasing rate ramp analysis, the model projects that net interest income would increase 2.1% over the next twelve months, as compared to a 2.2% increase at the end of 2017.

Management also utilizes a “Most Likely” forecast scenario to project net interest income over a rolling two-year time frame. This forecast is updated and reviewed quarterly, incorporating updated assumptions into the model such as estimated loan and deposit growth, balance sheet re-mixing strategies, changes in base forecasted rates for various maturities, competitive market spreads for various products and other assumptions. Such modeling helps to predict changes in forecasted outcomes and necessary adjustments to the plan to achieve management’s earnings goals.

The balance sheet shows slightly higher asset sensitivity as of March 31, 2018, as compared to December 31, 2017, with differences resulting from changes in the mix of, and growth in various earning assets and costing liabilities, as well as adjustments for various modeling assumptions such as deposit beta rates, decay rates for non-maturity deposits and loan prepayment speeds. Generally, deposit betas have increased over time in the model, while loan prepayment speeds have also increased to reflect various loan classifications’ propensity to prepay over time. Management believes that overall asset sensitivity in non-parallel rising rate scenarios may be somewhat neutralized due to slower prepayment speeds, rate floors, lower than forecasted increases to loan yields, extension risk associated with residential mortgages and mortgage-related securities, and other earning asset and costing liability differences versus currently modeled assumptions. Commercial loan floors currently average 4.10% on approximately $1.2 billion, or 29% of total commercial loans at March 31, 2018, as compared to $1.2 billion or 30% of commercial loans at December 31, 2017. Approximately 43% or $525.4 million of these loans are currently priced at their floor, as compared to 45% or $552.6 million at December 31, 2017. In a less than 100 basis point rising rate environment, these loans may not adjust as rapidly from their current floor level as compared to loans without floors.

The net interest margin has decreased by 4 basis points for the three month period ended March 31, 2018 compared to last year, as the tax-exempt securities portfolio tax-equivalent rate adjustment from 35% to 21% caused a reduction in the overall net interest margin by 6 basis points. New securities purchased at current rates helped to offset this reduction. In addition, higher non-interest bearing demand deposits and limited increases in other deposit categories resulted in margin improvement that limited the decrease from the tax equivalency calculation. The opportunity for margin expansion is dependent on additional federal funds increases and the shape of the yield curve, in addition to continued execution of our business strategy to grow certain loan categories and remixing higher cost borrowings and CDs into lower cost transaction accounts, while controlling transaction account betas as rates rise. In addition, net purchase accounting accretion is expected to decrease slightly throughout 2018, requiring loan growth and/or rate increases to offset such impact. Management currently anticipates that two to three additional short-term federal funds rate increases may occur by the end of 2018, relatively consistent with market and consensus economist expectations. Delays in implementing further rate increases, or increases to deposit betas beyond our current modeling assumptions for existing accounts, typically would have a negative impact on management’s estimates of the future direction and level of the net interest margin.

Customers over the past few years have moved maturing CD balances to lower-costing transaction accounts as well as into non-deposit products. A portion of these lower-cost transaction account balances may migrate to higher-costing CDs or money market accounts as short-term rates continue to increase. Runoff of CDs from prior acquisitions, many of which were customers with single service relationships have been replaced with FHLB and other short-term borrowings. Certificates of deposit totaling approximately $694.4 million mature within the next year at an average cost of 0.76%. Maturing borrowings in 2018 may be lengthened at a higher cost than the maturing borrowings’ average rate. In addition, with the pending First Sentry Bancshares acquisition, management is no longer intent on controlling the total size of the balance sheet in order to remain under $10 billion in total assets, and increased investment purchases in the first quarter resulted in an increased period-end total asset amount of $10.2 billion.

The Bank has significant additional borrowing capacity with the FHLB of Pittsburgh, the Federal Reserve Bank of Cleveland, and correspondent banks, and may utilize these funding sources or interest rate swap strategies as necessary to lengthen liabilities, to help offset mismatches in various asset maturities, and manage liquidity. CDARS^® and ICS^® deposits also may be used for similar purposes as well as for certain customers seeking higher-yielding instruments or maintaining deposit levels below individual FDIC insurance limits.

49

Current balance sheet strategies to manage the net interest margin in the expected rate environment include:

• increasing total loans, particularly commercial and home equity loans that have variable or adjustable features;

• selling a greater portion of residential mortgage loan production into the secondary market;

• growing demand deposit account types to increase the relative portion of these account types to total deposits;

• employing back-to-back loan swaps for certain commercial loan customers desiring a term fixed rate loan with the Bank receiving a variable rate;

• extending FHLB term borrowings to balance asset/liability mismatches;

• using the CDARS^® and ICS^® deposit programs to manage overall liability mix, and

• managing the overall size of the investment portfolio as part of overall liquidity and balance sheet management strategies.

WesBanco also periodically measures the economic value of equity, which is defined as the market value of tangible equity in various rate scenarios. At March 31, 2018, the market value of tangible equity as a percent of base in a 200 basis point rising rate environment indicates a decrease of 7.0%, compared to a decrease of 1.8% at December 31, 2017. In a 100 basis point falling rate environment at March 31, 2018, the model indicates an increase of 0.1%, compared to a decrease of 3.1% as of December 31, 2017. WesBanco’s policy is to limit such change to minus 10% increments for each 100 basis point change in interest rates. Generally, changes in the economic value of equity relate to changes in various assets and liabilities, as well as changes in loan prepayment speeds and deposit decay rates.

50

ITEM 4. CONTROLS AND PROCEDURES

EVALUATION OF DISCLOSURE CONTROLS AND PROCEDURES—WesBanco’s Chief Executive Officer (“CEO”) and Chief Financial Officer (“CFO”) have concluded that WesBanco’s disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended), based on their evaluation of these controls and procedures as of the end of the period covered by this Form 10-Q, are effective to ensure that information required to be disclosed by WesBanco in the reports it files under the Securities Exchange Act of 1934, as amended, is recorded, processed, summarized and reported within the time periods specified in the rules and forms of the SEC and that such information is accumulated and communicated to WesBanco’s management, including its principal executive officer and principal financial officer, as appropriate to allow timely decisions regarding required disclosure.

LIMITATIONS ON THE EFFECTIVENESS OF CONTROLS—WesBanco’s management, including the CEO and CFO, does not expect that WesBanco’s disclosure controls and internal controls will prevent all errors and all fraud. While WesBanco’s disclosure controls and procedures are designed to provide reasonable assurance of achieving their objective, no control system, no matter how well conceived and operated, can provide absolute assurance that the objectives of the control system are met. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, within the Company have been detected. These inherent limitations include the realities that judgments in decision-making can be faulty, and that breakdowns can occur because of simple error or mistake. Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people, or by management override of the controls.

CHANGES IN INTERNAL CONTROLS—There were no changes in WesBanco’s internal control over financial reporting that occurred during our fiscal quarter ended March 31, 2018 as required to be reported by paragraph (d) of Rules 13a-15 and 15d-15 under the Securities Exchange Act of 1934, that materially affected, or are reasonably likely to materially affect, WesBanco’s internal control over financial reporting.

51

PART II – OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

WesBanco is involved in various lawsuits, claims, investigations and proceedings which arise in the ordinary course of business. While any litigation contains an element of uncertainty, WesBanco does not believe that a material loss related to such proceedings or claims pending or known to be threatened is reasonably possible.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

As of March 31, 2018, WesBanco had two active one million share stock repurchase plans. The first plan was originally approved by the Board of Directors on March 21, 2007 and the second, which is incremental to the first, was approved October 22, 2015. Each provides for shares to be repurchased for general corporate purposes, which may include a subsequent resource for potential acquisitions, shareholder dividend reinvestment and employee benefit plans. The timing, price and quantity of purchases are at the discretion of WesBanco, and the plan may be discontinued or suspended at any time.

The following table presents the monthly share purchase activity during the quarter ended March 31, 2018:

Period	Total Number of Shares Purchased		Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans		Maximum Number of Shares that May Yet Be Purchased Under the Plans
Balance at December 31, 2017								1,107,297
January 1, 2018 to January 31, 2018
Open market repurchases		—		—		—		1,107,297
Other transactions (1)		16,669	$	41.31		N/A		N/A
February 1, 2018 to February 28, 2018
Open market repurchases		—		—		—		1,107,297
Other transactions (1)		1,628	$	41.81		N/A		N/A
March 1, 2018 to March 31, 2018
Open market repurchases		—		—		—		1,107,297
Other transactions (1)		1,374	$	43.26		N/A		N/A
First Quarter 2018
Open market repurchases		—		—		—		1,107,297
Other transactions (1)		19,671	$	41.49		N/A		N/A
Total		19,671	$	41.49		—		1,107,297

(1) Consists of open market purchases transacted for employee benefit and dividend reinvestment plans.

N/A – Not applicable

52

ITEM 6. EXHIBITS

2.1	Agreement and Plan of Merger by and between WesBanco, Inc., WesBanco Bank, Inc., Farmers Capital Bank Corporation and United Bank & Capital Trust Company. (Incorporated by reference to Form 8-K filed by the Registrant with the Securities and Exchange Commission on April 20, 2018.)
10.1	Form of Change in Control Agreement by and between WesBanco, Inc., WesBanco Bank, Inc. and Ivan Burdine (incorporated by reference to Form 8-K filed by the Registrant with the Securities and Exchange Commission on June 5, 2013)*.
31.1	Certification of Chief Executive Officer of Periodic Report Pursuant to Rule 13a-15(e) or Rule 15d-15(e).
31.2	Certification of Chief Financial Officer of Periodic Report Pursuant to Rule 13a-15(e) or Rule 15d-15(e).
32.1	Certification Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101	The following materials from WesBanco’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2018, formatted in XBRL (Extensible Business Reporting Language): (i) the Consolidated Balance Sheets at March 31, 2018 and December 31, 2017, (ii) the Consolidated Statements of Comprehensive Income for the three months ended March 31, 2018 and 2017, (iii) the Consolidated Statements of Changes in Stockholders’ Equity for the three months ended March 31, 2018 and 2017, (iv) the Consolidated Statements of Cash Flows for the three months ended March 31, 2018 and 2017, and (v) the Notes to Consolidated Financial Statements.

* Indicates management contract or compensatory plan or agreement.

53

SIGNATURES

Pursuant to the requirements 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.

	WESBANCO, INC.
Date: April 30, 2018	/s/ Todd F. Clossin
	Todd F. Clossin
	President and Chief Executive Officer (Principal Executive Officer)
Date: April 30, 2018	/s/ Robert H. Young
	Robert H. Young
	Executive Vice President and Chief Financial Officer (Principal Financial and Accounting Officer)

54

EX-31.1

EXHIBIT 31.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

OF PERIODIC REPORT PURSUANT TO RULE 13a-15(e) or RULE 15d-15(e)

I, Todd F. Clossin, certify that:

1. I have reviewed this Report on Form 10-Q of WesBanco, 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 similar 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: April 30, 2018	/s/ Todd F. Clossin
	Todd F. Clossin
	President and Chief Executive Officer

EX-31.2

EXHIBIT 31.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER

OF PERIODIC REPORT PURSUANT TO RULE 13a-15(e) or RULE 15d-15(e)

I, Robert H. Young, certify that:

1. I have reviewed this Report on Form 10-Q of WesBanco, 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 similar 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: April 30, 2018	/s/ Robert H. Young
	Robert H. Young
	Executive Vice President 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 Quarterly Report of WesBanco, Inc. on Form 10-Q as filed with the Securities and Exchange Commission on the date hereof (the “Report”), each of the undersigned, in the capacity and on the date indicated below, hereby certifies pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to his 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 operation of WesBanco, Inc.

Date: April 30, 2018	/s/ Todd F. Clossin
	Todd F. Clossin
	President and Chief Executive Officer
Date: April 30, 2018	/s/ Robert H. Young
	Robert H. Young
	Executive Vice President and Chief Financial Officer

The forgoing certifications are being furnished solely pursuant to Subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code in accordance with Section 906 of the Sarbanes-Oxley Act of 2002 and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, or otherwise subject to the liability of that section, and shall not be deemed to be incorporated by reference into any filing under the Securities Act of 1933 or the Securities Exchange Act of 1934.

A signed original of this written statement required by Section 906 of the Sarbanes-Oxley Act of 2002, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

XML

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2018	Apr. 23, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q1
Trading Symbol	WSBC
Entity Registrant Name	WESBANCO INC
Entity Central Index Key	0000203596
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		46,568,911

XML

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
ASSETS
Cash and due from banks, including interest bearing amounts of $9,484 and $19,826, respectively	$ 100,845	$ 117,572
Securities:
Equity securities, at fair value	13,986	13,457
Available-for-sale debt securities, at fair value	1,728,377	1,261,865
Held-to-maturity debt securities (fair values of $1,005,502 and $1,023,784, respectively)	1,006,042	1,009,500
Total securities	2,748,405	2,284,822
Loans held for sale	12,962	20,320
Portfolio loans, net of unearned income	6,322,538	6,341,441
Allowance for loan losses	(46,334)	(45,284)
Net portfolio loans	6,276,204	6,296,157
Premises and equipment, net	128,583	130,722
Accrued interest receivable	31,963	29,728
Goodwill and other intangible assets, net	588,339	589,264
Bank-owned life insurance	191,839	192,589
Other assets	166,279	155,004
Total Assets	10,245,419	9,816,178
Deposits:
Non-interest bearing demand	1,950,619	1,846,748
Interest bearing demand	1,768,977	1,625,015
Money market	984,429	1,024,856
Savings deposits	1,314,632	1,269,912
Certificates of deposit	1,207,669	1,277,057
Total deposits	7,226,326	7,043,588
Federal Home Loan Bank borrowings	1,166,939	948,203
Other short-term borrowings	207,653	184,805
Subordinated debt and junior subordinated debt	164,379	164,327
Total borrowings	1,538,971	1,297,335
Accrued interest payable	4,033	3,178
Other liabilities	73,063	76,756
Total Liabilities	8,842,393	8,420,857
SHAREHOLDERS' EQUITY
Preferred stock, no par value; 1,000,000 shares authorized; none outstanding
Common stock, $2.0833 par value; 100,000,000 shares authorized in 2018 and 2017, respectively; 44,060,957 and 44,043,244 shares issued, respectively; 44,060,957 and 44,043,244 shares outstanding, respectively	91,793	91,756
Capital surplus	686,169	684,730
Retained earnings	673,174	651,357
Treasury stock (0 shares in 2018 and 2017, respectively, at cost)	0	0
Accumulated other comprehensive loss	(47,076)	(31,495)
Deferred benefits for directors	(1,034)	(1,027)
Total Shareholders' Equity	1,403,026	1,395,321
Total Liabilities and Shareholders' Equity	$ 10,245,419	$ 9,816,178

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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Interest bearing deposits, banks	$ 9,484	$ 19,826
Held-to-maturity securities, fair values	$ 1,005,502	$ 1,023,784
Preferred stock, no par value
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 2.0833	$ 2.0833
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	44,060,957	44,043,244
Common stock, shares outstanding	44,060,957	44,043,244
Treasury stock, shares	0	0

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Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
INTEREST AND DIVIDEND INCOME
Loans, including fees	$ 69,237	$ 64,898
Interest and dividends on securities:
Taxable	11,543	9,596
Tax-exempt	4,834	4,891
Total interest and dividends on securities	16,377	14,487
Other interest income	803	539
Total interest and dividend income	86,417	79,924
INTEREST EXPENSE
Interest bearing demand deposits	2,524	1,093
Money market deposits	878	574
Savings deposits	189	181
Certificates of deposit	2,536	2,411
Total interest expense on deposits	6,127	4,259
Federal Home Loan Bank borrowings	4,498	2,836
Other short-term borrowings	558	297
Subordinated debt and junior subordinated debt	1,942	1,813
Total interest expense	13,125	9,205
NET INTEREST INCOME	73,292	70,719
Provision for credit losses	2,168	2,711
Net interest income after provision for credit losses	71,124	68,008
NON-INTEREST INCOME
Trust fees	6,503	6,143
Service charges on deposits	4,822	4,853
Electronic banking fees	4,829	4,528
Net securities brokerage revenue	1,670	1,762
Bank-owned life insurance	2,756	1,140
Mortgage banking income	1,004	1,440
Net securities (losses) gains	(39)	12
Net gain (loss) on other real estate owned and other assets	262	(76)
Other income	2,173	3,082
Total non-interest income	23,980	22,884
NON-INTEREST EXPENSE
Salaries and wages	25,006	23,002
Employee benefits	6,912	8,210
Net occupancy	4,656	4,327
Equipment	3,949	4,042
Marketing	1,116	824
FDIC insurance	658	827
Amortization of intangible assets	1,086	1,273
Restructuring and merger-related expense	245	491
Other operating expenses	10,943	11,388
Total non-interest expense	54,571	54,384
Income before provision for income taxes	40,533	36,508
Provision for income taxes	7,004	10,622
NET INCOME	$ 33,529	$ 25,886
EARNINGS PER COMMON SHARE
Basic	$ 0.76	$ 0.59
Diluted	$ 0.76	$ 0.59
AVERAGE COMMON SHARES OUTSTANDING
Basic	44,050,701	43,947,563
Diluted	44,168,242	44,020,765
DIVIDENDS DECLARED PER COMMON SHARE	$ 0.29	$ 0.26
COMPREHENSIVE INCOME	$ 19,011	$ 28,171

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Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Capital Surplus [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Deferred Benefits for Directors [Member]
Beginning Balance at Dec. 31, 2016	$ 1,341,408	$ 91,524	$ 680,507	$ 597,071	$ (27,126)	$ (568)
Beginning Balance, shares at Dec. 31, 2016		43,931,715
Net income	25,886			25,886
Other comprehensive income	2,285				2,285
Comprehensive income	28,171
Common dividends declared ($0.26 per share)	(11,429)			(11,429)
Stock options exercised	526	$ 36	490
Stock options exercised, shares		17,634
Restricted stock granted		$ 8	(8)
Restricted stock granted, shares		3,702
Stock compensation expense	477		477
Deferred benefits for directors - net			5			(5)
Ending Balance at Mar. 31, 2017	1,359,153	$ 91,568	681,471	611,528	(24,841)	(573)
Ending Balance, shares at Mar. 31, 2017		43,953,051
Beginning Balance at Dec. 31, 2017	1,395,321	$ 91,756	684,730	651,357	(31,495)	(1,027)
Beginning Balance, shares at Dec. 31, 2017		44,043,244
Net income	33,529			33,529
Other comprehensive income	(14,518)				(14,518)
Comprehensive income	19,011
Common dividends declared ($0.26 per share)	(12,775)			(12,775)
Adoption of accounting standard ASU 2016-01				1,063	(1,063)
Stock options exercised	560	$ 37	523
Stock options exercised, shares		17,713
Stock compensation expense	909		909
Deferred benefits for directors - net			7			(7)
Ending Balance at Mar. 31, 2018	$ 1,403,026	$ 91,793	$ 686,169	$ 673,174	$ (47,076)	$ (1,034)
Ending Balance, shares at Mar. 31, 2018		44,060,957

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Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Stockholders' Equity [Abstract]
Common dividends declared, per share	$ 0.29	$ 0.26

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Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Cash Flows [Abstract]
NET CASH PROVIDED BY OPERATING ACTIVITIES	$ 32,371	$ 47,508
INVESTING ACTIVITIES
Net decrease (increase) in loans held for investment	19,923	(63,701)
Debt securities available-for-sale:
Proceeds from maturities, prepayments and calls	53,496	59,043
Purchases of securities	(540,624)	(41,742)
Debt securities held-to-maturity:
Proceeds from maturities, prepayments and calls	17,121	24,367
Purchases of securities	(15,343)	(16,023)
Equity securities:
Purchases of securities	(558)
Proceeds from bank-owned life insurance	3,506
Purchases of premises and equipment-net	(328)	(2,311)
Net cash used in investing activities	(462,807)	(40,367)
FINANCING ACTIVITIES
Increase in deposits	183,012	105,344
Proceeds from Federal Home Loan Bank borrowings	375,000	170,000
Repayment of Federal Home Loan Bank borrowings	(156,261)	(201,825)
Increase (decrease) in other short-term borrowings	27,848	(25,733)
Decrease in federal funds purchased	(5,000)	(58,000)
Dividends paid to common shareholders	(11,450)	(10,539)
Issuance of common stock	560	526
Net cash provided by (used in) financing activities	413,709	(20,227)
Net decrease in cash and cash equivalents	(16,727)	(13,086)
Cash and cash equivalents at beginning of the period	117,572	128,170
Cash and cash equivalents at end of the period	100,845	115,084
SUPPLEMENTAL DISCLOSURES
Interest paid on deposits and other borrowings	$ 12,496	9,441
Income taxes paid		250
Transfers of loans to other real estate owned		$ 77

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Summary of Significant Accounting Policies

3 Months Ended

Mar. 31, 2018

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of presentation — The accompanying unaudited interim financial statements of WesBanco, Inc. and its consolidated subsidiaries (“WesBanco”) have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements and should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2017.

WesBanco’s interim financial statements have been prepared following the significant accounting policies disclosed in Note 1 of the Notes to the Consolidated Financial Statements of its 2017 Annual Report on Form 10-K filed with the Securities and Exchange Commission. In the opinion of management, the accompanying interim financial information reflects all adjustments, including normal recurring adjustments, necessary to present fairly WesBanco’s financial position and results of operations for each of the interim periods presented. Certain prior period amounts have been reclassified to conform to the current period presentation. Such reclassifications had no impact on WesBanco’s net income and stockholders’ equity. Results of operations for interim periods are not necessarily indicative of the results of operations that may be expected for a full year.

Recent accounting pronouncements — In August 2017, the FASB issued ASU No. 2017-12, “Targeted Improvements to Accounting for Hedging Activities.” The new guidance will make more financial and nonfinancial hedging strategies eligible for hedge accounting. It also amends the presentation and disclosure requirements and changes how companies assess effectiveness. It is intended to more closely align hedge accounting with companies’ risk management strategies, simplify the application of hedge accounting, and increase transparency as to the scope and results of hedging programs. The guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. Early adoption is permitted, including adoption in an interim period. WesBanco is assessing the impact of ASU 2017-12 on WesBanco’s Consolidated Financial Statements.

In March 2017, the FASB issued ASU 2017-07 that changes how an employer presents the net periodic benefit cost in the income statement for an employer-sponsored defined benefit pension and/or other postretirement benefit plans. Employers will present the service cost component of net periodic benefit cost in the same income statement line item as other employee compensation costs arising from services rendered during the period. Only the service cost component will be eligible for capitalization in assets. Employers will present the other components of the net periodic benefit cost separately from the line items that includes the service cost outside of any subtotal of operating income, if one is presented. These components will not be eligible for capitalization in assets. For public business entities, the amendments in this update are effective for annual reporting periods beginning after December 15, 2017, including interim reporting periods within those annual reporting periods. Early adoption is permitted as of the beginning of an annual period (i.e., only in the first interim period). For WesBanco, this update was effective for the fiscal year beginning January 1, 2018. Upon adoption, WesBanco reclassified the service cost component from employee benefits to salaries and wages, which are both components of non-interest expense. The service cost component for the three months ended March 31, 2018 was $0.7 million.

In January 2017, the FASB issued ASU No. 2017-01, which clarifies the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. ASU 2017-01 will be effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017, which for WesBanco was effective for the fiscal year beginning January 1, 2018. The adoption of this pronouncement did not have a material impact on WesBanco’s Consolidated Financial Statements.

In October 2016, the FASB issued ASU 2016-16 that provides the recognition of income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. Current guidance prohibits the recognition of current and deferred income taxes for an intra-entity asset transfer until the asset has been sold to an outside party. This prohibition on recognition is an exception to the principle of comprehensive recognition of current and deferred income taxes in generally accepted accounting principles. The exception has led to diversity in practice and is a source of complexity in financial reporting. FASB decided that an entity should recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. Consequently, the amendments in this update eliminate the exception for an intra-entity transfer of an asset other than inventory. The amendments in this update do not include new disclosure requirements; however, existing disclosure requirements might be applicable when accounting for the current and deferred income taxes for an intra-entity transfer of an asset other than inventory. For public business entities, the amendments in this update are effective for annual reporting periods beginning after December 15, 2017, including interim reporting periods within those annual reporting periods, which for WesBanco was effective for the fiscal year beginning January 1, 2018. The amendments in this update should be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The adoption of this pronouncement did not have a material impact on WesBanco’s Consolidated Financial Statements.

In August 2016, the FASB issued ASU 2016-15 that provides guidance for the classification of cash flows related to (1) debt prepayment or extinguishment costs, (2) settlement of zero-coupon debt instruments or other debt instruments with coupon rates that are insignificant in relation to the effective interest rate on 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, (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. Public business entities must apply the new requirements for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years, which for WesBanco was effective for the fiscal year beginning January 1, 2018. Early adoption is permitted. The adoption of this pronouncement did not have a material impact on WesBanco’s Consolidated Financial Statements.

In June 2016, the FASB issued ASU 2016-13 that will require entities to use a new forward-looking “expected loss” model on trade and other receivables, held-to-maturity debt securities, loans and other instruments that generally will result in the earlier recognition of allowances for credit losses. For available-for-sale debt securities with unrealized losses, entities will measure credit losses in a manner similar to what they do today, except that the losses will be recognized as allowances rather than reductions in the amortized cost of the securities. Entities will have to disclose significantly more information, including information they use to track credit quality by year of origination for most financing receivables. Public business entities must apply the new requirements for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years, which for WesBanco will be effective for the fiscal year beginning January 1, 2020. Early adoption is permitted for fiscal years beginning after December 15, 2018. WesBanco is currently evaluating the impact of the adoption of this pronouncement on WesBanco’s Consolidated Financial Statements.

In February 2016, the FASB issued ASU 2016-02 that will require entities to recognize lease assets and lease liabilities on the balance sheet and disclose key information about leasing arrangements. The principal difference from previous guidance is that the lease assets and lease liabilities arising from operating leases were not previously recognized in the balance sheet. Public business entities must apply the new requirements for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. In January 2018, the FASB issued ASU 2018-01, which allows entities the option to apply the provisions of the new lease guidance at the effective date without adjusting the comparative periods presented. While we are currently assessing the impact of the adoption of this pronouncement, we expect the primary impact to our consolidated financial position upon adoption will be the recognition, on a discounted basis, of our minimum commitments under non-cancellable operating leases on our consolidated Balance Sheets resulting in the recording of right of use assets and lease obligations.

In January 2016, the FASB issued ASU 2016-01 that will require entities to measure equity investments that do not result in consolidation and are not accounted for under the equity method at fair value and recognize any changes in fair value in net income unless the investments qualify for the new practicability exception. The standard does not change the guidance for classifying and measuring investments in debt securities and loans. Entities will have to record changes in instrument-specific credit risk for financial liabilities measured under the fair value option in other comprehensive income. Public business entities must apply the new requirements for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. In February 2018, the FASB issued ASU 2018-03, which clarifies certain aspects of the guidance issued in ASU 2016-01. WesBanco adopted these pronouncements as of January 1, 2018 and recognized a $1.1 million adjustment to retained earnings upon adoption of this pronouncement. In addition, WesBanco reclassified investment securities on the Consolidated Financial Statements into the following – equity securities, available-for-sale debt securities and held-to-maturity debt securities.

In May 2014, the FASB issued ASU 2014-09 related to the recognition of revenue from contracts with customers. The new revenue pronouncement creates a single source of revenue guidance for all companies in all industries and is more principles-based than current revenue guidance. The pronouncement provides a five-step model for a company to recognize revenue when it transfers control of goods or services to customers at an amount that reflects the consideration to which it expects to be entitled in exchange for those goods or services. The five steps are, (1) identify the contract with the customer, (2) identify the separate performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price to the separate performance obligations and (5) recognize revenue when each performance obligation is satisfied. On July 9, 2015, the FASB approved a one-year deferral of the effective date of the update. The update is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017. In March 2016, the FASB issued ASU 2016-08, which amends the principle versus agent guidance in the revenue standard. In April 2016, the FASB issued ASU 2016-10, which clarifies when promised goods or services are separately identifiable in the revenue standard. In May 2016, FASB issued ASU 2016-12, which provides narrow-scope improvements and practical expedients to the revenue standard. WesBanco adopted these pronouncements as of January 1, 2018 using the modified retrospective approach. WesBanco noted no material change to the timing of revenue recognition and there was no material impact on WesBanco’s Consolidated Financial Statements. See Note 8, Revenue Recognition for further discussion on revenue within the scope of ASC 606.

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Earnings Per Common Share

3 Months Ended

Mar. 31, 2018

Earnings Per Share [Abstract]

Earnings Per Common Share

NOTE 2. EARNINGS PER COMMON SHARE

Earnings per common share are calculated as follows:

	For the Three Months Ended March 31,
(unaudited, in thousands, except shares and per share amounts)	2018		2017
Numerator for both basic and diluted earnings per common share:
Net income	$	33,529	$	25,886
Denominator:
Total average basic common shares outstanding		44,050,701		43,947,563
Effect of dilutive stock options and other stock compensation		117,541		73,202
Total diluted average common shares outstanding		44,168,242		44,020,765
Earnings per common share – basic	$	0.76	$	0.59
Earnings per common share – diluted	$	0.76	$	0.59

All options to purchase shares were included in the diluted shares computation for the three months ended March 31, 2018 and March 31, 2017.

As of March 31, 2018, contingently issuable shares, totaling 39,216, were estimated to be awarded under the 2018, 2017 and 2016 total shareholder return plans as stock performance targets were met and are included in the diluted calculation. As of March 31, 2017, the shares related to the 2017 and 2016 total shareholder return plans were not included in the calculation because the effect would be antidilutive. Performance based restricted stock compensation totaling 9,000 shares were estimated to be awarded as of March 31, 2018 and are included in the diluted calculation. No performance base restricted stock had been granted as of March 31, 2017.

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Securities

3 Months Ended

Mar. 31, 2018

Investments, Debt and Equity Securities [Abstract]

Securities

NOTE 3. SECURITIES

The following table presents the fair value and amortized cost of available-for-sale and held-to-maturity debt securities:

	March 31, 2018									December 31, 2017
(unaudited, in thousands)	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 debt securities
U.S. Treasury	$	9,900	$	—	$	(6	)	$	9,894	$	—	$	—	$	—		$	—
U.S. Government sponsored entities and agencies		98,166		1		(1,709	)		96,458		72,425		24		(606	)		71,843
Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies		1,377,904		214		(33,708	)		1,344,410		954,115		214		(19,407	)		934,922
Commerical mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies		144,568		19		(3,661	)		140,926		116,448		4		(1,585	)		114,867
Obligations of states and political subdivisions		100,531		2,093		(1,193	)		101,431		102,363		2,927		(460	)		104,830
Corporate debt securities		35,219		170		(131	)		35,258		35,234		228		(59	)		35,403
Total available-for-sale debt securities	$	1,766,288	$	2,497	$	(40,408	)	$	1,728,377	$	1,280,585	$	3,397	$	(22,117	)	$	1,261,865
Held-to-maturity debt securities
U.S. Government sponsored entities and agencies	$	11,263	$	—	$	(373	)	$	10,890	$	11,465	$	—	$	(325	)	$	11,140
Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies		162,904		301		(4,987	)		158,218		170,025		544		(2,609	)		167,960
Obligations of states and political subdivisions		798,536		10,510		(5,838	)		803,208		794,655		17,364		(1,609	)		810,410
Corporate debt securities		33,339		82		(235	)		33,186		33,355		919		—			34,274
Total held-to-maturity debt securities	$	1,006,042	$	10,893	$	(11,433	)	$	1,005,502	$	1,009,500	$	18,827	$	(4,543	)	$	1,023,784
Total debt securities	$	2,772,330	$	13,390	$	(51,841	)	$	2,733,879	$	2,290,085	$	22,224	$	(26,660	)	$	2,285,649

At March 31, 2018, and December 31, 2017, there were no holdings of any one issuer, other than U.S. government sponsored entities and its agencies, in an amount greater than 10% of WesBanco’s shareholders’ equity.

Equity securities, of which some consist of investments in various mutual funds held in grantor trusts formed in connection with the Company’s deferred compensation plan, are recorded at fair value and totaled $14.0 million and $13.5 million, at March 31, 2018 and December 31, 2017, respectively.

The following table presents the fair value of available-for-sale and held-to-maturity debt securities by contractual maturity at March 31, 2018. In some instances, the issuers may have the right to call or prepay obligations without penalty prior to the contractual maturity date.

	March 31, 2018
(unaudited, in thousands)	One Year or less		One to Five Years		Five to Ten Years		After Ten Years		Mortgage-backed securities		Total
Available-for-sale debt securities
U.S. Treasury	$	9,894	$	—	$	—	$	—	$	—	$	9,894
U.S. Government sponsored entities and agencies		9,945		1,961		16,671		6,864		61,017		96,458
Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies (1)		—		—		—		—		1,344,410		1,344,410
Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies (1)		—		—		—		—		140,926		140,926
Obligations of states and political subdivisions		3,686		17,368		40,161		40,216		—		101,431
Corporate debt securities		3,991		26,299		4,968		—		—		35,258
Total available-for-sale debt securities	$	27,516	$	45,628	$	61,800	$	47,080	$	1,546,353	$	1,728,377
Held-to-maturity debt securities (2)
U.S. Government sponsored entities and agencies	$	—	$	—	$	—	$	—	$	10,890	$	10,890
Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies (1)				—		—		—		158,218		158,218
Obligations of states and political subdivisions		6,872		114,768		398,845		282,723		—		803,208
Corporate debt securities		—		7,504		25,682		—		—		33,186
Total held-to-maturity debt securities	$	6,872	$	122,272	$	424,527	$	282,723	$	169,108	$	1,005,502
Total debt securities	$	34,388	$	167,900	$	486,327	$	329,803	$	1,715,461	$	2,733,879

⁽¹⁾ Mortgage-backed and collateralized mortgage securities, which have prepayment provisions, are not assigned to maturity categories due to fluctuations in their prepayment speeds.

⁽²⁾  The held-to-maturity debt securities portfolio is carried at an amortized cost of $1.0 billion.

Securities with aggregate fair values of $1.5 billion and $1.4 billion at March 31, 2018 and December 31, 2017, respectively, were pledged as security for public and trust funds, and securities sold under agreements to repurchase. There were no sales of available-for-sale debt securities for the three months ended March 31, 2018 and 2017, respectively. Net unrealized losses on available-for-sale debt securities included in accumulated other comprehensive income net of tax, as of March 31, 2018 and December 31, 2017 were $29.2 million and $13.3 million, respectively.

The following table presents the gross realized gains and losses on sales and calls of available-for-sale and held-to-maturity debt securities, as well as gains and losses on equity securities for the three months ended March 31, 2018 and 2017, respectively.

	For the Three Months Ended March 31,
(unaudited, in thousands)	2018			2017
Debt securities:
Gross realized gains	$	7		$	12
Gross realized losses		(18	)		—
Net (losses) gains on debt securities	$	(11	)	$	12
Equity securities:
Unrealized (losses) gains recognized on securities still held	$	(28	)	$	—
Net realized (losses) gains recognized on securities sold		—			—
Net (losses) gains on equity securities	$	(28	)	$	—
Net securities (losses) gains	$	(39	)	$	12

The following tables provide information on unrealized losses on debt securities that have been in an unrealized loss position for less than twelve months and twelve months or more as of March 31, 2018 and December 31, 2017:

	March 31, 2018
	Less than 12 months							12 months or more							Total
	Fair		Unrealized			# of		Fair		Unrealized			# of		Fair		Unrealized			# of
(unaudited, dollars in thousands)	Value		Losses			Securities		Value		Losses			Securities		Value		Losses			Securities
U.S. Treasury	$	9,894	$	(6	)		1	$	—	$	—			—	$	9,894	$	(6	)		1
U.S. Government sponsored entities and agencies		59,280		(1,129	)		8		41,203		(953	)		8		100,483		(2,082	)		16
Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies		785,806		(13,021	)		128		602,202		(25,674	)		195		1,388,008		(38,695	)		323
Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies		101,309		(2,780	)		12		23,376		(881	)		4		124,685		(3,661	)		16
Obligations of states and political subdivisions		335,762		(4,776	)		527		72,751		(2,255	)		152		408,513		(7,031	)		679
Corporate debt securities		35,405		(352	)		12		1,974		(14	)		1		37,379		(366	)		13
Total temporarily impaired securities	$	1,327,456	$	(22,064	)		688	$	741,506	$	(29,777	)		360	$	2,068,962	$	(51,841	)		1,048
	December 31, 2017
	Less than 12 months							12 months or more							Total
	Fair		Unrealized			# of		Fair		Unrealized			# of		Fair		Unrealized			# of
(unaudited, dollars in thousands)	Value		Losses			Securities		Value		Losses			Securities		Value		Losses			Securities
U.S. Government sponsored entities and agencies	$	24,776	$	(160	)		4	$	42,248	$	(771	)		8	$	67,024	$	(931	)		12
Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies		423,794		(5,039	)		87		637,461		(16,977	)		193		1,061,255		(22,016	)		280
Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies		79,061		(1,089	)		10		27,852		(496	)		6		106,913		(1,585	)		16
Obligations of states and political subdivisions		132,831		(852	)		210		77,554		(1,217	)		160		210,385		(2,069	)		370
Corporate debt securities		4,015		(19	)		1		1,948		(40	)		1		5,963		(59	)		2
Total temporarily impaired securities	$	664,477	$	(7,159	)		312	$	787,063	$	(19,501	)		368	$	1,451,540	$	(26,660	)		680

Unrealized losses on debt securities in the tables represent temporary fluctuations resulting from changes in market rates in relation to fixed yields. Unrealized losses in the available-for-sale portfolio are accounted for as an adjustment, net of taxes, to other comprehensive income in shareholders’ equity.

WesBanco does not believe the securities presented above are impaired due to reasons of credit quality, as substantially all debt securities are rated above investment grade and all are paying principal and interest according to their contractual terms. WesBanco does not intend to sell, nor is it more likely than not that it will be required to sell, loss position securities prior to recovery of their cost, and therefore, management believes the unrealized losses detailed above are temporary and no impairment loss relating to these securities has been recognized.

Securities that do not have readily determinable fair values and for which WesBanco does not exercise significant influence are carried at cost. Cost method investments consist primarily of FHLB of Pittsburgh, Cincinnati and Indianapolis stock totaling $55.6 million and $45.9 million at March 31, 2018 and December 31, 2017, respectively, and are included in other assets in the Consolidated Balance Sheets. Cost method investments are evaluated for impairment whenever events or circumstances suggest that their carrying value may not be recoverable.

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Loans and the Allowance for Credit Losses

3 Months Ended

Mar. 31, 2018

Receivables [Abstract]

Loans and the Allowance for Credit Losses

NOTE 4. LOANS AND THE ALLOWANCE FOR CREDIT LOSSES

The recorded investment in loans is presented in the Consolidated Balance Sheets net of deferred loan fees and costs, and discounts on purchased loans. The net deferred loan costs were $1.9 million and $1.6 million at March 31, 2018 and December 31, 2017, respectively. The unamortized discount on purchased loans from acquisitions was $20.8 million, including $10.0 million related to YCB, and $21.9 million at March 31, 2018 and December 31, 2017, respectively.

(unaudited, in thousands)	March 31, 2018		December 31, 2017
Commercial real estate:
Land and construction	$	440,896	$	392,597
Improved property		2,574,330		2,601,851
Total commercial real estate		3,015,226		2,994,448
Commercial and industrial		1,118,333		1,125,327
Residential real estate		1,345,993		1,353,301
Home equity		523,425		529,196
Consumer		319,561		339,169
Total portfolio loans		6,322,538		6,341,441
Loans held for sale		12,962		20,320
Total loans	$	6,335,500	$	6,361,761

The following tables summarize changes in the allowance for credit losses applicable to each category of the loan portfolio:

	Allowance for Credit Losses By Category
	For the Three Months Ended March 31, 2018 and 2017
	Commercial			Commercial
	Real Estate-			Real Estate-
	Land and			Improved			Commercial			Residential			Home						Deposit
(unaudited, in thousands)	Construction			Property			& Industrial			Real Estate			Equity			Consumer			Overdraft			Total
Balance at December 31, 2017:
Allowance for loan losses	$	3,117		$	21,166		$	9,414		$	3,206		$	4,497		$	3,063		$	821		$	45,284
Allowance for loan commitments		119			26			173			7			212			37			—			574
Total beginning allowance for credit losses		3,236			21,192			9,587			3,213			4,709			3,100			821			45,858
Provision for credit losses:
Provision for loan losses		1,090			(895	)		919			202			262			583			(48	)		2,113
Provision for loan commitments		57			(5	)		3			—			(4	)		4			—			55
Total provision for credit losses		1,147			(900	)		922			202			258			587			(48	)		2,168
Charge-offs		—			(279	)		(109	)		(287	)		(576	)		(1,125	)		(267	)		(2,643	)
Recoveries		117			287			270			131			120			546			109			1,580
Net charge-offs		117			8			161			(156	)		(456	)		(579	)		(158	)		(1,063	)
Balance at March 31, 2018:
Allowance for loan losses		4,324			20,279			10,494			3,252			4,303			3,067			615			46,334
Allowance for loan commitments		176			21			176			7			208			41			—			629
Total ending allowance for credit losses	$	4,500		$	20,300		$	10,670		$	3,259		$	4,511		$	3,108		$	615		$	46,963
Balance at December 31, 2016:
Allowance for loan losses	$	4,348		$	18,628		$	8,412		$	4,106		$	3,422		$	3,998		$	760		$	43,674
Allowance for loan commitments		151			17			188			9			162			44			—			571
Total beginning allowance for credit losses		4,499			18,645			8,600			4,115			3,584			4,042			760			44,245
Provision for credit losses:
Provision for loan losses		(425	)		983			832			330			365			583			66			2,734
Provision for loan commitments		(8	)		—			(31	)		1			17			(2	)		—			(23	)
Total provision for credit losses		(433	)		983			801			331			382			581			66			2,711
Charge-offs		—			(602	)		(880	)		(404	)		(108	)		(1,287	)		(338	)		(3,619	)
Recoveries		52			251			376			78			48			369			98			1,272
Net charge-offs		52			(351	)		(504	)		(326	)		(60	)		(918	)		(240	)		(2,347	)
Balance at March 31, 2017:
Allowance for loan losses		3,975			19,260			8,740			4,110			3,727			3,663			586			44,061
Allowance for loan commitments		143			17			157			10			179			42			—			548
Total ending allowance for credit losses	$	4,118		$	19,277		$	8,897		$	4,120		$	3,906		$	3,705		$	586		$	44,609

The following tables present the allowance for credit losses and recorded investments in loans by category:

	Allowance for Credit Losses and Recorded Investment in Loans
	Commercial		Commercial
	Real Estate-		Real Estate-		Commercial		Residential						Deposit
	Land and		Improved		and		Real		Home				Over-
(unaudited, in thousands)	Construction		Property		Industrial		Estate		Equity		Consumer		draft		Total
March 31, 2018
Allowance for credit losses:
Allowance for loans individually evaluated for impairment	$	—	$	387	$	—	$	—	$	—	$	—	$	—	$	387
Allowance for loans collectively evaluated for impairment		4,324		19,892		10,494		3,252		4,303		3,067		615		45,947
Allowance for loan commitments		176		21		176		7		208		41		—		629
Total allowance for credit losses	$	4,500	$	20,300	$	10,670	$	3,259	$	4,511	$	3,108	$	615	$	46,963
Portfolio loans:
Individually evaluated for impairment (1)	$	—	$	2,104	$	—	$	—	$	—	$	—	$	—	$	2,104
Collectively evaluated for impairment		439,480		2,567,367		1,117,607		1,345,290		523,425		319,561		—		6,312,730
Acquired with deteriorated credit quality		1,416		4,859		726		703		—		—		—		7,704
Total portfolio loans	$	440,896	$	2,574,330	$	1,118,333	$	1,345,993	$	523,425	$	319,561	$	—	$	6,322,538
December 31, 2017
Allowance for credit losses:
Allowance for loans individually evaluated for impairment	$	—	$	388	$	—	$	—	$	—	$	—	$	—	$	388
Allowance for loans collectively evaluated for impairment		3,117		20,778		9,414		3,206		4,497		3,063		821		44,896
Allowance for loan commitments		119		26		173		7		212		37		—		574
Total allowance for credit losses	$	3,236	$	21,192	$	9,587	$	3,213	$	4,709	$	3,100	$	821	$	45,858
Portfolio loans:
Individually evaluated for impairment (1)	$	—	$	3,344	$	—	$	—	$	—	$	—	$	—	$	3,344
Collectively evaluated for impairment		391,140		2,593,393		1,124,544		1,352,587		529,196		339,163		—		6,330,023
Acquired with deteriorated credit quality		1,457		5,114		783		714		—		6		—		8,074
Total portfolio loans	$	392,597	$	2,601,851	$	1,125,327	$	1,353,301	$	529,196	$	339,169	$	—	$	6,341,441

⁽¹⁾  Commercial loans greater than $1 million that are reported as non-accrual or as a TDR are individually evaluated for impairment.

WesBanco maintains an internal loan grading system to reflect the credit quality of commercial loans. Commercial loan risk grades are determined based on an evaluation of the relevant characteristics of each loan, assigned at the inception of each loan and adjusted thereafter at any time to reflect changes in the risk profile throughout the life of each loan. The primary factors used to determine the risk grade are the reliability and sustainability of the primary source of repayment and overall financial strength of the borrower. This includes an analysis of cash flow available to repay debt, profitability, liquidity, leverage, and overall financial trends. Other factors include management, industry or property type risks, an assessment of secondary sources of repayment such as collateral or guarantees, other terms and conditions of the loan that may increase or reduce its risk, and economic conditions and other external factors that may influence repayment capacity and financial condition.

Commercial real estate – land and construction consists of loans to finance investments in vacant land, land development, construction of residential housing, and construction of commercial buildings. Commercial real estate – improved property consists of loans for the purchase or refinance of all types of improved owner-occupied and investment properties. Factors that are considered in assigning the risk grade vary depending on the type of property financed. The risk grade assigned to construction and development loans is based on the overall viability of the project, the experience and financial capacity of the developer or builder to successfully complete the project, project specific and market absorption rates and comparable property values, and the amount of pre-sales for residential housing construction or pre-leases for commercial investment property. The risk grade assigned to commercial investment property loans is based primarily on the adequacy of net rental income generated by the property to service the debt, the type, quality, industry and mix of tenants, and the terms of leases, but also considers the overall financial capacity of the investors and their experience in owning and managing investment property. The risk grade assigned to owner-occupied commercial real estate and commercial and industrial loans is based primarily on historical and projected earnings, the adequacy of operating cash flow to service all of the business’ debt, and the capital resources, liquidity and leverage of the business, but also considers the industry in which the business operates, the business’ specific competitive advantages or disadvantages, the quality and experience of management, and external influences on the business such as economic conditions.

Commercial and industrial loans consist of revolving lines of credit to finance accounts receivable, inventory and other general business purposes; term loans to finance fixed assets other than real estate, and letters of credit to support trade, insurance or governmental requirements for a variety of businesses. Most C&I borrowers are privately-held companies with annual sales up to $100 million. Factors that are considered for commercial and industrial loans include the type, quality and marketability of non-real estate collateral and whether the structure of the loan increases or reduces its risk. The type, age, condition, location and any environmental risks associated with a property are also considered for all types of commercial real estate. The overall financial condition and repayment capacity of any guarantors is also evaluated to determine the extent to which they mitigate other risks of the loan. The following paragraphs provide descriptions of risk grades that are applicable to commercial real estate and commercial and industrial loans.

Pass loans are those that exhibit a history of positive financial results that are at least comparable to the average for their industry or type of real estate. The primary source of repayment is acceptable and these loans are expected to perform satisfactorily during most economic cycles. Pass loans typically have no significant external factors that are expected to adversely affect these borrowers more than others in the same industry or property type. Any minor unfavorable characteristics of these loans are outweighed or mitigated by other positive factors including but not limited to adequate secondary or tertiary sources of repayment.

Criticized or compromised loans are currently protected but have weaknesses, which, if not corrected, may be inadequately protected at some future date. These loans represent an unwarranted credit risk and would generally not be extended in the normal course of lending. Specific issues which may warrant this grade include declining financial results, increased reliance on secondary sources of repayment or guarantor support and adverse external influences that may negatively impact the business or property.

Substandard and doubtful loans are equivalent to the classifications used by banking regulators. Substandard loans are inadequately protected by the current repayment capacity and equity of the borrower or collateral pledged, if any. Substandard loans have one or more well-defined weaknesses that jeopardize their repayment or collection in full. These loans may or may not be reported as non-accrual. Doubtful loans have all the weaknesses inherent to a substandard loan with the added characteristic that full repayment is highly questionable or improbable on the basis of currently existing facts, conditions and collateral values. However, recognition of loss may be deferred if there are reasonably specific pending factors that will reduce the risk if they occur.

The following tables summarize commercial loans by their assigned risk grade:

	Commerical Loans by Internally Assigned Risk Grade
(unaudited, in thousands)	Commercial Real Estate- Land and Construction		Commercial Real Estate- Improved Property		Commercial & Industrial		Total Commercial Loans
As of March 31, 2018
Pass	$	434,665	$	2,526,334	$	1,104,209	$	4,065,208
Criticized - compromised		3,384		24,807		5,594		33,785
Classified - substandard		2,847		23,189		8,530		34,566
Classified - doubtful		—		—		—		—
Total	$	440,896	$	2,574,330	$	1,118,333	$	4,133,559
As of December 31, 2017
Pass	$	386,753	$	2,548,805	$	1,110,267	$	4,045,825
Criticized - compromised		2,984		25,673		7,435		36,092
Classified - substandard		2,860		27,373		7,625		37,858
Classified - doubtful		—		—		—		—
Total	$	392,597	$	2,601,851	$	1,125,327	$	4,119,775

Residential real estate, home equity and consumer loans are not assigned internal risk grades other than as required by regulatory guidelines that are based primarily on the age of past due loans. WesBanco primarily evaluates the credit quality of residential real estate, home equity and consumer loans based on repayment performance and historical loss rates. The aggregate amount of residential real estate, home equity and consumer loans classified as substandard in accordance with regulatory guidelines was $19.4 million at March 31, 2018 and $22.8 million at December 31, 2017, of which $1.0 and $2.5 million were accruing, for each period, respectively. The aggregate amount of residential real estate, home equity and consumer loans classified as substandard are not included in the tables above.

Acquired YCB Loans — The carrying amount of loans acquired from YCB with deteriorated credit quality at March 31, 2018 and December 31, 2017 was $4.2 million and $4.3 million, respectively, of which $0.7 million and $0.8 million, respectively, were accounted for under the cost recovery method in accordance with ASC 310-30 as cash flows cannot be reasonably estimated, and therefore are categorized as non-accrual. At March 31, 2018, the accretable yield was $1.3 million. At March 31, 2018 and December 31, 2017, an allowance for loan loss of $0.2 million and $0, respectively, has been recognized related to the YCB acquired impaired loans, as the estimates for future cash flows on these loans have been negatively impacted.

Acquired ESB Loans — The carrying amount of loans acquired from ESB with deteriorated credit quality at March 31, 2018 and December 31, 2017 was $3.5 million and $3.7 million, respectively, of which $3.5 million for both periods was accounted for under the cost recovery method in accordance with ASC 310-30 as cash flows cannot be reasonably estimated, and therefore were categorized as non-accrual. At March 31, 2018, the accretable yield was $2.9 million. At March 31, 2018 and December 31, 2017 an allowance for loan loss of $2.0 million has been recognized related to the ESB acquired impaired loans, as the estimates for future cash flows on these loans have been negatively impacted.

The following table provides changes in accretable yield for loans acquired with deteriorated credit quality:

	For the Three Months Ended
(unaudited, in thousands)	March 31, 2018			March 31, 2017
Balance at beginning of period	$	1,724		$	1,717
Acquisitions		—			—
Reduction due to change in projected cash flows		(86	)		(200	)
Reclass from non-accretable difference		2,841			174
Transfers out		—			—
Accretion		(268	)		(151	)
Balance at end of period	$	4,211		$	1,540

The following tables summarize the age analysis of all categories of loans:

	Age Analysis of Loans
(unaudited, in thousands)	Current		30-59 Days Past Due		60-89 Days Past Due		90 Days or More Past Due		Total Past Due		Total Loans		90 Days or More Past Due and Accruing (1)
As of March 31, 2018
Commercial real estate:
Land and construction	$	439,926	$	—	$	—	$	970	$	970	$	440,896	$	172
Improved property		2,559,491		4,431		528		9,880		14,839		2,574,330		364
Total commercial real estate		2,999,417		4,431		528		10,850		15,809		3,015,226		536
Commercial and industrial		1,115,453		667		201		2,012		2,880		1,118,333		21
Residential real estate		1,333,175		3,860		1,618		7,340		12,818		1,345,993		561
Home equity		517,172		2,654		682		2,917		6,253		523,425		251
Consumer		316,517		1,950		432		662		3,044		319,561		210
Total portfolio loans		6,281,734		13,562		3,461		23,781		40,804		6,322,538		1,579
Loans held for sale		12,962		—		—		—		—		12,962		—
Total loans	$	6,294,696	$	13,562	$	3,461	$	23,781	$	40,804	$	6,335,500	$	1,579
Impaired loans included above are as follows:
Non-accrual loans	$	8,120	$	1,310	$	754	$	22,202	$	24,266	$	32,386
TDRs accruing interest (1)		6,435		230		193		—		423		6,858
Total impaired	$	14,555	$	1,540	$	947	$	22,202	$	24,689	$	39,244
As of December 31, 2017
Commercial real estate:
Land and construction	$	392,189	$	—	$	172	$	236	$	408	$	392,597	$	—
Improved property		2,589,704		374		1,200		10,573		12,147		2,601,851		243
Total commercial real estate		2,981,893		374		1,372		10,809		12,555		2,994,448		243
Commercial and industrial		1,121,957		572		196		2,602		3,370		1,125,327		20
Residential real estate		1,338,240		4,487		2,376		8,198		15,061		1,353,301		1,113
Home equity		522,584		2,135		683		3,794		6,612		529,196		742
Consumer		334,723		2,466		842		1,138		4,446		339,169		608
Total portfolio loans		6,299,397		10,034		5,469		26,541		42,044		6,341,441		2,726
Loans held for sale		20,320		—		—		—		—		20,320		—
Total loans	$	6,319,717	$	10,034	$	5,469	$	26,541	$	42,044	$	6,361,761	$	2,726
Impaired loans included above are as follows:
Non-accrual loans	$	9,195	$	1,782	$	2,033	$	23,815	$	27,630	$	36,825
TDRs accruing interest (1)		6,055		348		168		—		516		6,571
Total impaired	$	15,250	$	2,130	$	2,201	$	23,815	$	28,146	$	43,396

⁽¹⁾ Loans 90 days or more past due and accruing interest exclude TDRs 90 days or more past due and accruing interest.

The following tables summarize impaired loans:

	Impaired Loans
	March 31, 2018						December 31, 2017
	Unpaid Principal Balance (1)		Recorded Investment		Related Allowance		Unpaid Principal Balance (1)		Recorded Investment		Related Allowance
(unaudited, in thousands)
With no related specific allowance recorded:
Commercial real estate:
Land and construction	$	873	$	800	$	—	$	412	$	239	$	—
Improved property		14,554		10,319		—		18,229		12,863		—
Commercial and industrial		3,045		2,496		—		3,745		3,086		—
Residential real estate		19,601		17,751		—		20,821		18,982		—
Home equity		5,771		4,971		—		5,833		5,169		—
Consumer		918		803		—		1,084		952		—
Total impaired loans without a specific allowance		44,762		37,140		—		50,124		41,291		—
With a specific allowance recorded:
Commercial real estate:
Land and construction		—		—		—		—		—		—
Improved property		2,104		2,104		387		2,105		2,105		388
Commercial and industrial		—		—		—		—		—		—
Total impaired loans with a specific allowance		2,104		2,104		387		2,105		2,105		388
Total impaired loans	$	46,866	$	39,244	$	387	$	52,229	$	43,396	$	388

⁽¹⁾ The difference between the unpaid principal balance and the recorded investment generally reflects amounts that have been previously charged-off and fair market value adjustments on acquired impaired loans.

	Impaired Loans
	For the Three Months Ended March 31, 2018				For the Three Months Ended March 31, 2017
	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
(unaudited, in thousands)
With no related specific allowance recorded:
Commercial real estate:
Land and construction	$	520	$	—	$	588	$	—
Improved property		11,591		345		9,620		346
Commercial and industrial		2,791		2		3,812		2
Residential real estate		18,367		66		18,448		69
Home equity		5,070		5		4,186		5
Consumer		878		3		761		2
Total impaired loans without a specific allowance		39,217		421		37,415		424
With a specific allowance recorded:
Commercial real estate:
Land and construction		—		—		—		—
Improved property		2,105		—		4,927		—
Commercial and industrial		—		—		635		—
Total impaired loans with a specific allowance		2,105		—		5,562		—
Total impaired loans	$	41,322	$	421	$	42,977	$	424

The following tables present the recorded investment in non-accrual loans and TDRs:

	Non-accrual Loans (1)
(unaudited, in thousands)	March 31, 2018		December 31, 2017
Commercial real estate:
Land and construction	$	800	$	239
Improved property		10,821		13,318
Total commercial real estate		11,621		13,557
Commercial and industrial		2,373		2,958
Residential real estate		13,149		14,661
Home equity		4,540		4,762
Consumer		703		887
Total	$	32,386	$	36,825

⁽¹⁾  At March 31, 2018, there were 2 borrowers with loans greater than $1.0 million totaling $5.6 million, as compared to three borrowers with loans greater than $1.0 million totaling $6.8 million at December 31, 2017. Total non-accrual loans include loans that are also restructured. Such loans are also set forth in the following table as non-accrual TDRs.

	TDRs
	March 31, 2018						December 31, 2017
(unaudited, in thousands)	Accruing		Non-Accrual		Total		Accruing		Non-Accrual		Total
Commercial real estate:
Land and construction	$	—	$	2	$	2	$	—	$	3	$	3
Improved property		1,602		490		2,092		1,650		428		2,078
Total commercial real estate		1,602		492		2,094		1,650		431		2,081
Commercial and industrial		123		94		217		128		97		225
Residential real estate		4,602		1,525		6,127		4,321		1,880		6,201
Home equity		431		220		651		407		337		744
Consumer		100		66		166		65		120		185
Total	$	6,858	$	2,397	$	9,255	$	6,571	$	2,865	$	9,436

As of March 31, 2018 and December 31, 2017 there were no TDRs greater than $1.0 million. The concessions granted in the majority of loans reported as accruing and non-accrual TDRs are extensions of the maturity date or the amortization period, reductions in the interest rate below the prevailing market rate for loans with comparable characteristics, and/or permitting interest-only payments for longer than three months. WesBanco had unfunded commitments to debtors whose loans were classified as impaired of $0.1 million as of March 31, 2018 and December 31, 2017.

The following tables present details related to loans identified as TDRs during the three months ended March 31, 2018 and 2017, respectively:

	New TDRs (1) For the Three Months Ended
	March 31, 2018						March 31, 2017
			Pre-		Post-				Pre-		Post-
			Modification		Modification				Modification		Modification
			Outstanding		Outstanding				Outstanding		Outstanding
	Number of		Recorded		Recorded		Number of		Recorded		Recorded
(unaudited, dollars in thousands)	Modifications		Investment		Investment		Modifications		Investment		Investment
Commercial real estate:
Land and construction		—	$	—	$	—		—	$	—	$	—
Improved Property		—		—		—		—		—		—
Total commercial real estate		—		—		—		—		—		—
Commercial and industrial		—		—		—		2		126		122
Residential real estate		5		203		195		1		10		9
Home equity		—		—		—		1		44		43
Consumer		2		4		3		2		84		21
Total		7	$	207	$	198		6	$	264	$	195

⁽¹⁾  Excludes loans that were either paid off or charged-off by period end. The pre-modification balance represents the balance outstanding at the beginning of the period. The post-modification balance represents the outstanding balance at period end.

The following table summarizes TDRs which defaulted (defined as past due 90 days) during the three months ended March 31, 2018 and 2017, respectively, that were restructured within the last twelve months prior to March 31, 2018 and 2017, respectively:

	Defaulted TDRs (1)				Defaulted TDRs (1)
	For the Three Months Ended				For the Three Months Ended
	March 31, 2018				March 31, 2017
(unaudited, dollars in thousands)	Number of Defaults		Recorded Investment		Number of Defaults		Recorded Investment
Commercial real estate:
Land and construction		—	$	—		—	$	—
Improved property		—		—		—		—
Total commercial real estate		—		—		—		—
Commercial and industrial		—		—		—		—
Residential real estate		1		122		—		—
Home equity		1		7		—		—
Consumer		—		—		1		9
Total		2	$	129		1	$	9

⁽¹⁾ Excludes loans that were either charged-off or cured by period end. The recorded investment is as of March 31, 2018 and 2017, respectively.

TDRs that default are placed on non-accrual status unless they are both well-secured and in the process of collection. The loans in the table above were not accruing interest.

The following table summarizes other real estate owned and repossessed assets included in other assets:

(unaudited, in thousands)	March 31, 2018		December 31, 2017
Other real estate owned	$	3,991	$	5,195
Repossessed assets		76		102
Total other real estate owned and repossessed assets	$	4,067	$	5,297

Residential real estate included in other real estate owned at March 31, 2018 and December 31, 2017 was $0.9 million and $1.5 million, respectively. At March 31, 2018 and December 31, 2017, formal foreclosure proceedings were in process on residential real estate loans totaling $4.3 million and $3.5 million, respectively.

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Derivatives and Hedging Activities

3 Months Ended

Mar. 31, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivatives and Hedging Activities

NOTE 5. DERIVATIVES AND HEDGING ACTIVITIES

Risk Management Objective of Using Derivatives

WesBanco is exposed to certain risks arising from both its business operations and economic conditions. WesBanco principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. WesBanco manages economic risks, including interest rate, liquidity, and credit risk, primarily by managing the amount, sources, and duration of its assets and liabilities. WesBanco’s existing interest rate derivatives result from a service provided to certain qualifying customers and, therefore, are not used to manage interest rate risk in WesBanco’s assets or liabilities. WesBanco manages a matched book with respect to its derivative instruments in order to minimize its net risk exposure resulting from such transactions. A matched book is when the Bank’s assets and liabilities are equally distributed but also have similar maturities.

Loan Swaps

WesBanco executes interest rate swaps with commercial banking customers to facilitate their respective risk management strategies. Those interest rate swaps are simultaneously hedged by offsetting interest rate swaps that WesBanco executes with a third party, such that WesBanco minimizes its net risk exposure resulting from such transactions. As the interest rate swaps associated with this program do not meet the strict hedge accounting requirements of FASB ASC 815, changes in the fair value of both the customer swaps and the offsetting third-party swaps are recognized directly in earnings. As of March 31, 2018 and December 31, 2017, WesBanco had 43 and 39, respectively, interest rate swaps with an aggregate notional amount of $309.2 million and $298.2 million, respectively, related to this program. During the three months ended March 31, 2018 and 2017, WesBanco recognized net gains (net losses) of $0.2 million and $(0.2) million, respectively, related to the changes in fair value of these swaps. Additionally, WesBanco recognized $0.4 million and $1.0 million of income for the related swap fees for the three months ended March 31, 2018 and 2017, respectively.

Mortgage Loans Held for Sale and Loan Commitments

Certain residential mortgage loans are originated for sale in the secondary mortgage loan market. These loans are classified as held for sale and carried at fair value as WesBanco has elected the fair value option. Fair value is determined based on rates obtained from the secondary market for loans with similar characteristics. WesBanco sells loans to the secondary market on a mandatory or best efforts basis. The loans sold on a mandatory basis are not committed to an investor until the loan is closed with the borrower. WesBanco enters into forward TBA contracts to manage the interest rate risk between the loan commitment and the closing of the loan. The loans sold on a best efforts basis are committed to an investor simultaneous to the interest rate commitment with the borrower.

Fair Values of Derivative Instruments on the Balance Sheet

All derivatives are carried on the consolidated balance sheet at fair value. Derivative assets are classified in the consolidated balance sheet under other assets, and derivative liabilities are classified in the consolidated balance sheet under other liabilities. Changes in fair value are recognized in earnings. None of WesBanco’s derivatives are designated in qualifying hedging relationships under ASC 815.

The table below presents the fair value of WesBanco’s derivative financial instruments as well as their classification on the Balance Sheet as of March 31, 2018 and December 31, 2017:

	March 31, 2018						December 31, 2017
(unaudited, in thousands)	Notional or Contractual Amount		Asset Derivatives		Liability Derivatives		Notional or Contractual Amount		Asset Derivatives		Liability Derivatives
Derivatives
Loan Swaps:
Interest rate swaps	$	309,242	$	9,257	$	9,083	$	298,223	$	7,351	$	7,345
Other contracts:
Interest rate loan commitments		24,730		147		—		20,319		49		—
Best efforts forward delivery commitments		3,941		—		11		2,905		—		6
Forward TBA contracts		36,500		—		3		31,750		—		23
Total derivatives			$	9,404	$	9,097			$	7,400	$	7,374

Effect of Derivative Instruments on the Income Statement

The table below presents the change in the fair value of the Company’s derivative financial instruments reflected within the other non-interest income line item of the consolidated income statement for the three months ended March 31, 2018 and 2017, respectively.

		For the Three Months Ended
	Location of Gain/(Loss)	March 31,
(unaudited, in thousands)		2018			2017
Interest rate swaps	Other income	$	(167	)	$	195
Interest rate loan commitments	Mortgage banking income		98			—
Best efforts forward sales contracts	Mortgage banking income		(5	)		—
Forward TBA contracts	Mortgage banking income		410			—
Total		$	336		$	195

Credit-risk-related Contingent Features

WesBanco has agreements with its derivative counterparties that contain a provision where if WesBanco defaults on any of its indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then WesBanco could also be declared in default on its derivative obligations.

WesBanco also has agreements with certain of its derivative counterparties that contain a provision where if WesBanco fails to maintain its status as either a well or adequately capitalized institution, then the counterparty could terminate the derivative positions and WesBanco would be required to settle its obligations under the agreements.

WesBanco has minimum collateral posting thresholds with certain of its derivative counterparties and has posted collateral with a market value of $2.9 million as of March 31, 2018. If WesBanco had breached any of these provisions at March 31, 2018, it could have been required to settle its obligations under the agreements at the termination value and would have been required to pay any additional amounts due in excess of amounts previously posted as collateral with the respective counterparty.

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Pension Plan

3 Months Ended

Mar. 31, 2018

Retirement Benefits [Abstract]

Pension Plan

NOTE 6. PENSION PLAN

The following table presents the net periodic pension cost for WesBanco’s Defined Benefit Pension Plan (the “Plan”) and the related components:

	For the Three Months Ended March 31,
(unaudited, in thousands)	2018			2017
Service cost – benefits earned during year	$	699		$	636
Interest cost on projected benefit obligation		1,114			1,084
Expected return on plan assets		(2,204	)		(1,886	)
Amortization of prior service cost		6			6
Amortization of net loss		753			794
Net periodic pension cost	$	368		$	634

The Plan covers all employees of WesBanco and its subsidiaries who were hired on or before August 1, 2007 who satisfy minimum age and length of service requirements, and is not available to employees hired after such date.

A minimum required contribution of $5.1 million is due for 2018, which could be all or partially offset by the Plan’s $56.9 million available credit balance. WesBanco currently expects to make a voluntary contribution of $5.0 million to the Plan in 2018.

WesBanco assumed YCB’s obligation for a predecessor bank’s participation in the Pentegra Defined Benefit Plan for Financial Institutions (“Pentegra Plan”). The participating employer plan has been frozen to new participants since 2002. WesBanco spun off the assets from the Pentegra Plan, contributing approximately $2.8 million to satisfy the estimated final costs to do so. This spin off had no impact on earnings as the liability was included in YCB’s balance sheet as of the acquisition date. The distributed assets from the Pentegra Plan were transferred to a plan providing substantially the same benefits to the participants. The net periodic pension income for this plan for the three months ended March 31, 2018 was $62 thousand, which was comprised of a $0.2 million expected return on plan assets and a $3 thousand recognized net actuarial gain partially offset by a $0.1 million interest cost on projected benefit obligation.

No minimum contribution is due for this plan for fiscal year 2018; however, WesBanco expects to make a voluntary contribution of $0.2 million.

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Fair Value Measurement

3 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

Fair Value Measurement

NOTE 7. FAIR VALUE MEASUREMENT

Fair value estimates are based on quoted market prices, if available, quoted market prices of similar assets or liabilities, or the present value of expected future cash flows and other valuation techniques. These valuations are significantly affected by discount rates, cash flow assumptions, and risk assumptions used. Therefore, fair value estimates may not be substantiated by comparison to independent markets and are not intended to reflect the proceeds that may be realizable in an immediate settlement of the instruments.

Fair value is determined at one point in time and is not representative of future value. These amounts do not reflect the total value of a going concern organization. Management does not have the intention to dispose of a significant portion of its assets and liabilities, and therefore the unrealized gains or losses should not be interpreted as a forecast of future earnings and cash flows.

The following is a discussion of assets and liabilities measured at fair value on a recurring basis and valuation techniques applied:

Investment securities: The fair value of investment securities which are measured on a recurring basis are determined primarily by obtaining quoted prices on nationally recognized securities exchanges or matrix pricing, which is a mathematical technique used widely in the industry to value debt securities without relying exclusively on quoted prices for the specific securities but rather by relying on the securities’ relationship to other similar securities. These securities are classified within level 1 or 2 in the fair value hierarchy. Positions that are not traded in active markets for which valuations are generated using assumptions not observable in the market or management’s best estimate are classified within level 3 of the fair value hierarchy. This includes certain specific municipal debt issues for which the credit quality and discount rate must be estimated.

Derivatives: WesBanco enters into interest rate swap agreements with qualifying commercial customers to meet their financing, interest rate and other risk management needs. These agreements provide the customer the ability to convert from variable to fixed interest rates. The credit risk associated with derivatives executed with customers is essentially the same as that involved in extending loans and is subject to normal credit policies and monitoring. Those interest rate swaps are economically hedged by offsetting interest rate swaps that WesBanco executes with derivative counterparties in order to offset its exposure on the fixed components of the customer interest rate swap agreements. The interest rate swap agreement with the loan customer and with the counterparty is reported at fair value in other assets and other liabilities on the consolidated balance sheet with any resulting gain or loss recorded in current period earnings as other income and other expense.

WesBanco enters into forward TBA contracts to manage the interest rate risk between the loan commitments to the customer and the closing of the loan for loans that will be sold on a mandatory basis to secondary market investors. The forward TBA contract is reported at fair value in other assets and other liabilities on the consolidated balance sheet with any resulting gain or loss recorded in current period’s earnings as mortgage banking income.

WesBanco determines the fair value for derivatives using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects contractual terms of the derivative, including the period to maturity, and uses observable market-based inputs, including interest rate curves and implied volatilities. WesBanco incorporates credit valuation adjustments to appropriately reflect both its own non-performance risk and the respective counterparty’s non-performance risk in the fair value measurements.

We may be required from time to time to measure certain assets and liabilities at fair value on a nonrecurring basis in accordance with GAAP. These adjustments to fair value usually result from the application of lower of cost or market accounting or write-downs of individual assets and liabilities.

Impaired loans: Impaired loans are carried at the lower of cost or the fair value of the collateral for collateral-dependent loans. Collateral may be in the form of real estate or business assets including equipment, inventory and accounts receivable. The use of independent appraisals, discounted cash flow models and management’s best judgment are significant inputs in arriving at the fair value measure of the underlying collateral and impaired loans are therefore classified within level 3 of the fair value hierarchy.

Other real estate owned and repossessed assets: Other real estate owned and repossessed assets are carried at the lower of the investment in the assets or the fair value of the assets less estimated selling costs. The use of independent appraisals and management’s best judgment are significant inputs in arriving at the fair value measure of the underlying collateral, and therefore other real estate owned and repossessed assets are classified within level 3 of the fair value hierarchy.

Loans held for sale: Loans held for sale are carried, in aggregate, at fair value as WesBanco has elected the fair value option as of October 1, 2017. The use of a valuation model using quoted prices of similar instruments are significant inputs in arriving at the fair value and therefore loans held for sale are classified within level 2 of the fair value hierarchy.

Certain investments that are measured at fair value using the net asset value per share (or its equivalent) practical expedient have not been categorized in the fair value hierarchy. The fair value amounts presented in the table below are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the statement of financial position. The following tables set forth WesBanco’s financial assets and liabilities that were accounted for at fair value on a recurring and nonrecurring basis by level within the fair value hierarchy as of March 31, 2018 and December 31, 2017:

			March 31, 2018
			Fair Value Measurements Using:
	March 31, 2018		Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs		Investments Measured at Net Asset
(unaudited, in thousands)			(level 1)		(level 2)		(level 3)		Value
Recurring fair value measurements
Equity securities	$	13,986	$	11,568	$	—	$	—	$	2,418
Debt securities - available-for-sale
U.S. Treasury		9,894		—		9,894		—		—
U.S. Government sponsored entities and agencies		96,458		—		96,458		—		—
Residential mortgage-backed securities and collateralized mortgage obligations of government agencies		1,344,410		—		1,344,410		—		—
Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies		140,926		—		140,926		—		—
Obligations of state and political subdivisions		101,431		—		101,431		—		—
Corporate debt securities		35,258		—		35,258		—		—
Total debt securities - available-for-sale	$	1,728,377	$	—	$	1,728,377	$	—	$	—
Loans held for sale		12,962		—		12,962		—		—
Other assets - interest rate derivatives agreements		9,257		—		9,257		—		—
Total assets recurring fair value measurements	$	1,764,582	$	11,568	$	1,750,596	$	—	$	2,418
Other liabilities - interest rate derivatives agreements	$	9,083	$	—	$	9,083	$	—	$	—
Total liabilities recurring fair value measurements	$	9,083	$	—	$	9,083	$	—	$	—
Nonrecurring fair value measurements
Impaired loans	$	1,717	$	—	$	—	$	1,717	$	—
Other real estate owned and repossessed assets		4,067		—		—		4,067		—
Total nonrecurring fair value measurements	$	5,784	$	—	$	—	$	5,784	$	—

			December 31, 2017
			Fair Value Measurements Using:
	December 31,		Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs		Investments Measured at Net Asset
(unaudited, in thousands)	2017		(level 1)		(level 2)		(level 3)		Value
Recurring fair value measurements
Equity securities	$	13,457	$	11,391	$	—	$	—	$	2,066
Debt securities - available-for-sale
U.S. Government sponsored entities and agencies		71,843		—		71,843		—		—
Residential mortgage-backed securities and collateralized mortgage obligations of government agencies		934,922		—		934,922		—		—
Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies		114,867		—		114,867		—		—
Obligations of state and political subdivisions		104,830		—		104,830		—		—
Corporate debt securities		35,403		—		35,403		—		—
Total debt securities - available-for-sale	$	1,261,865	$	—	$	1,261,865	$	—	$	—
Loans held for sale		20,320		—		20,320		—		—
Other assets - interest rate derivatives agreements		7,351		—		7,351		—		—
Total assets recurring fair value measurements	$	1,302,993	$	11,391	$	1,289,536	$	—	$	2,066
Other liabilities - interest rate derivatives agreements	$	7,345	$	—	$	7,345	$	—	$	—
Total liabilities recurring fair value measurements	$	7,345	$	—	$	7,345	$	—	$	—
Nonrecurring fair value measurements
Impaired loans	$	1,717	$	—	$	—	$	1,717	$	—
Other real estate owned and repossessed assets		5,297		—		—		5,297		—
Total nonrecurring fair value measurements	$	7,014	$	—	$	—	$	7,014	$	—

WesBanco’s policy is to recognize transfers between levels as of the actual date of the event or change in circumstances that caused the transfer. There were no significant transfers between level 1, 2 or 3 for the three months ended March 31, 2018 or for the year ended December 31, 2017.

The following table presents additional quantitative information about assets measured at fair value on a nonrecurring basis and for which WesBanco has utilized level 3 inputs to determine fair value:

	Quantitative Information about Level 3 Fair Value Measurements
	Fair Value		Valuation	Unobservable	Range (Weighted
(unaudited, in thousands)	Estimate		Techniques	Input	Average)
March 31, 2018
Impaired loans	$	1,717	Appraisal of collateral (1)	Appraisal adjustments (2)	(4.8%) / (4.8%)
				Liquidation expenses (2)	(7.6%) / (7.6%)
Other real estate owned and repossessed assets		4,067	Appraisal of collateral (1), (3)
December 31, 2017:
Impaired loans	$	1,717	Appraisal of collateral (1)	Appraisal adjustments (2)	(4.8%) / (4.8%)
				Liquidation expenses (2)	(7.6%) / (7.6%)
Other real estate owned and repossessed assets		5,297	Appraisal of collateral (1), (3)

⁽¹⁾ Fair value is generally determined through independent appraisals of the underlying collateral, which generally include various level 3 inputs which are not identifiable.

⁽²⁾  Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses. The range and weighted average of appraisal adjustments and liquidation expenses are presented as a percent of the appraisal.

⁽³⁾  Includes estimated liquidation expenses and numerous dissimilar qualitative adjustments by management which are not identifiable.

The estimated fair values of WesBanco’s financial instruments are summarized below:

					Fair Value Measurements at March 31, 2018
(unaudited, in thousands)	Carrying Amount		Fair Value Estimate		Quoted Prices in Active Markets for Identical Assets (level 1)		Significant Other Observable Inputs (level 2)		Significant Unobservable Inputs (level 3)		Investments Measured at Net Asset Value
Financial Assets
Cash and due from banks	$	100,845	$	100,845	$	100,845	$	—	$	—	$	—
Equity securities		13,986		13,986		11,568		—		—		2,418
Debt securities available-for-sale		1,728,377		1,728,377		—		1,728,377		—		—
Debt securities held-to-maturity		1,006,042		1,005,502		—		1,004,912		590		—
Net loans		6,276,204		6,158,399		—		—		6,158,399		—
Loans held for sale		12,962		12,962		—		12,962		—		—
Other assets - interest rate derivatives		9,257		9,257		—		9,257		—		—
Accrued interest receivable		31,963		31,963		31,963		—		—		—
Financial Liabilities
Deposits		7,226,326		7,230,335		6,018,657		1,211,678		—		—
Federal Home Loan Bank borrowings		1,166,939		1,161,442		—		1,161,442		—		—
Other borrowings		207,653		207,627		205,651		1,976		—		—
Subordinated debt and junior subordinated debt		164,379		149,887		—		149,887		—		—
Other liabilities - interest rate derivatives		9,083		9,083		—		9,083		—		—
Accrued interest payable		4,033		4,033		4,033		—		—		—

					Fair Value Measurements at December 31, 2017
(unaudited, in thousands)	Carrying Amount		Fair Value Estimate		Quoted Prices in Active Markets for Identical Assets (level 1)		Significant Other Observable Inputs (level 2)		Significant Unobservable Inputs (level 3)		Investments Measured at Net Asset Value
Financial Assets
Cash and due from banks	$	117,572	$	117,572	$	117,572	$	—	$	—	$	—
Equity securities		13,457		13,457		11,391		—		—		2,066
Debt securities available-for-sale		1,261,865		1,261,865		—		1,261,865		—		—
Debt securities held-to-maturity		1,009,500		1,023,784		—		1,023,191		593		—
Net loans		6,296,157		6,212,823		—		—		6,212,823		—
Loans held for sale		20,320		20,320		—		20,320		—		—
Other assets - interest rate derivatives		7,351		7,351		—		7,351		—		—
Accrued interest receivable		29,728		29,728		29,728		—		—		—
Financial Liabilities
Deposits		7,043,588		7,053,536		5,766,531		1,287,005		—		—
Federal Home Loan Bank borrowings		948,203		944,706		—		944,706		—		—
Other borrowings		184,805		184,814		182,785		2,029		—		—
Subordinated debt and junior subordinated debt		164,327		146,484		—		146,484		—		—
Other liabilities - interest rate derivatives		7,345		7,345		—		7,345		—		—
Accrued interest payable		3,178		3,178		3,178		—		—		—

The following methods and assumptions were used to measure the fair value of financial instruments recorded at cost on WesBanco’s consolidated balance sheets:

Cash and due from banks: The carrying amount for cash and due from banks is a reasonable estimate of fair value.

Debt securities held-to-maturity: Fair values for debt securities held-to-maturity are determined in the same manner as the investment securities which are described above.

Net loans: Fair values for loans are estimated using a discounted cash flow methodology. The discount rates take into account interest rates currently being offered to customers for loans with similar terms, the credit risk associated with the loan and other market factors, including liquidity. WesBanco believes the discount rates are consistent with transactions occurring in the marketplace for both performing and distressed loan types. The carrying value is net of the allowance for loan losses and other associated premiums and discounts. Due to the significant judgment involved in evaluating credit quality, loans are classified within level 3 of the fair value hierarchy.

Accrued interest receivable: The carrying amount of accrued interest receivable approximates its fair value.

Deposits: The carrying amount is considered a reasonable estimate of fair value for demand, savings and other variable rate deposit accounts. The fair value of fixed maturity certificates of deposit is estimated by a discounted cash flow method using rates currently offered for deposits of similar remaining maturities.

Federal Home Loan Bank borrowings: The fair value of FHLB borrowings is based on rates currently available to WesBanco for borrowings with similar terms and remaining maturities.

Other borrowings: The carrying amount of federal funds purchased and overnight sweep accounts generally approximate fair value. Other repurchase agreements are based on quoted market prices if available. If market prices are not available, for certain fixed and adjustable rate repurchase agreements, then quoted market prices of similar instruments are used.

Subordinated debt and junior subordinated debt: The fair value of subordinated debt is estimated using discounted cash flow analyses based on the current borrowing rates for similar types of borrowing arrangements. Due to the pooled nature of junior subordinated debt owed to unconsolidated subsidiary trusts, which are not actively traded, estimated fair value is based on recent similar transactions of single-issuer trust preferred securities.

Accrued interest payable: The carrying amount of accrued interest payable approximates its fair value.

Off-balance sheet financial instruments:Off-balance sheet financial instruments consist of commitments to extend credit, including letters of credit. Fair values for commitments to extend credit are estimated using the fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements and the present credit standing of the counterparties. The estimated fair value of the commitments to extend credit and letters of credit are insignificant and therefore are not presented in the above tables.

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Revenue Recognition

3 Months Ended

Mar. 31, 2018

Text Block [Abstract]

Revenue Recognition

NOTE 8. REVENUE RECOGNITION

WesBanco adopted ASU 2014-09 as of January 1, 2018 under the modified retrospective approach and there was no material impact on WesBanco’s Consolidated Financial statements. Interest income, net securities (losses) gains and bank-owned life insurance are not in scope of ASC 606, Revenue from Contracts with Customers. For the revenue streams in scope of ASC 606 - trust fees, service charges on deposits, electronic banking fees, net securities brokerage revenue, mortgage banking income and net gain or loss on sale of other real estate owned – there are no significant judgements related to the amount and timing of revenue recognition.

Trust fees: Fees are earned over a period of time between monthly and annually, per the related fee schedule. The fees are earned ratably over the period for investment, safekeeping and other services performance by WesBanco. The fees are accrued when earned based on the daily asset value on the last day of the quarter. In most cases, the fees are directly debited from the customer account.

Service charges on deposits: There are monthly service charges for both commercial and personal banking customers, which are earned over the month per the related fee schedule based on the customers’ deposits. There are also transaction-based fees, which are earned based on specific transactions or customer activity within the customers’ deposit accounts. These are earned at the time the transaction or customer activity occurs. The fees are debited from the customer account.

Electronic banking fees: Interchange and ATM fees are earned based on customer and ATM transactions. Revenue is recognized when the transaction is settled.

Net securities brokerage revenue: Commission income is earned based on customer transactions and management of investments. The commission income from customers’ transactions is recognized when the transaction is complete. The commission income from the management of investments is earned continuously over a quarterly period.

Mortgage banking income: Income is earned when WesBanco-originated loans are sold to an investor on the secondary market. The investor bids on the loans. If the price is accepted, WesBanco delivers the loan documents to the investor. Once received and approved by the investor, revenue is recognized and the loans are derecognized from the Consolidated Balance Sheet. Prior to the loans being sold, they are classified as loans held for sale. Additionally, the changes in the fair value of the loans held for sale, loan commitments and related derivatives are included in mortgage banking income.

Net gain or loss on sale of other real estate owned: Net gain or loss is recorded when other real estate is sold to a third party and the Bank collects substantially all of the consideration to which WesBanco is entitled in exchange for the transfer of the property.

The following table summarizes the point of revenue recognition and the income recognized for each of the revenue streams for the three months ended March 31, 2018:

(unaudited, in thousands)	Point of Revenue Recognition		For the Three Months Ended March 31, 2018
Revenue Streams
Trust Fees
Trust account fees		Over time	$	4,292
WesMark fees		Over time		2,211
Total trust fees				6,503
Service charges on deposits
Commercial banking fees		Over time		407
Personal service charges		At a point in time & Over time		4,415
Total service charges on deposits				4,822
Net securities brokerage revenue
Annuity commissions		At a point in time		1,200
Equity and debt security trades		At a point in time		102
Managed money		Over time		141
Trail commissions		Over time		227
Total net securities brokerage revenue				1,670
Electronic banking fees		At a point in time		4,829
Mortgage banking income		At a point in time		1,004
Gain/loss on sale of OREO/other assets		At a point in time		262

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Comprehensive Income/(Loss)

3 Months Ended

Mar. 31, 2018

Equity [Abstract]

Comprehensive Income/(Loss)

NOTE 9. COMPREHENSIVE INCOME/(LOSS)

The activity in accumulated other comprehensive income for the three months ended March 31, 2018 and 2017 is as follows:

	Accumulated Other Comprehensive Income/(Loss) (1)
(unaudited, in thousands)	Defined Benefit Pension Plan			Unrealized Gains (Losses) on Debt Securities Available-for-Sale			Unrealized Gains on Debt Securities Transferred from Available-for-Sale to Held-to-Maturity			Total
Balance at December 31, 2017	$	(18,626	)	$	(13,250	)	$	381		$	(31,495	)
Other comprehensive income before reclassifications		—			(14,905	)		—			(14,905	)
Amounts reclassified from accumulated other comprehensive income		437			—			(50	)		387
Period change		437			(14,905	)		(50	)		(14,518	)
Adoption of Accounting Standard ASU 2016-01 (2)		—			(1,063	)		—			(1,063	)
Balance at March 31, 2018	$	(18,189	)	$	(29,218	)	$	331		$	(47,076	)
Balance at December 31, 2016	$	(17,758	)	$	(9,890	)	$	522		$	(27,126	)
Other comprehensive income before reclassifications		—			1,680			—			1,680
Amounts reclassified from accumulated other comprehensive income		655			—			(50	)		605
Period change		655			1,680			(50	)		2,285
Balance at March 31, 2017	$	(17,103	)	$	(8,210	)	$	472		$	(24,841	)

⁽¹⁾  All amounts are net of tax. Related income tax expense or benefit is calculated using a combined Federal and State income tax rate approximating 23% in 2018 and 37% in all prior periods.

⁽²⁾  See Note 1, Summary of Significant Accounting Policies for additional information about WesBanco’s adoption of ASU 2016-01.

The following table provides details about amounts reclassified from accumulated other comprehensive income for the three months ended March 31, 2018 and 2017:

Details about Accumulated Other Comprehensive Income/(Loss) Components	Amounts Reclassified from Accumulated Other Comprehensive Income/(Loss) For the Three Months Ended March 31,						Affected Line Item in the Statement of Net Income
(unaudited, in thousands)	2018			2017
Debt securities available-for-sale (1):
Net securities gains reclassified into earnings	$	—		$	—		Net securities gains (Non-interest income)
Related income tax expense		—			—		Provision for income taxes
Net effect on accumulated other comprehensive income for the period		—			—
Debt securities held-to-maturity (1):
Amortization of unrealized gain transferred from available-for-sale		(66	)		(72	)	Interest and dividends on securities (Interest and dividend income)
Related income tax expense		16			22		Provision for income taxes
Net effect on accumulated other comprehensive income for the period		(50	)		(50	)
Defined benefit pension plan (2):
Amortization of net loss and prior service costs		756			801		Employee benefits (Non-interest expense)
Related income tax benefit		(319	)		(146	)	Provision for income taxes
Net effect on accumulated other comprehensive income for the period		437			655
Total reclassifications for the period	$	387		$	605

⁽¹⁾ For additional detail related to unrealized gains on securities and related amounts reclassified from accumulated other comprehensive income, see Note 3, “Securities.”

⁽²⁾ Included in the computation of net periodic pension cost. See Note 6, “Pension Plan” for additional detail.

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Commitments and Contingent Liabilities

3 Months Ended

Mar. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingent Liabilities

NOTE 10. COMMITMENTS AND CONTINGENT LIABILITIES

Commitments — In the normal course of business, WesBanco offers off-balance sheet credit arrangements to enable its customers to meet their financing objectives. Those instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the financial statements. WesBanco’s exposure to credit losses in the event of non-performance by the other parties to the financial instruments for commitments to extend credit and standby letters of credit is limited to the contractual amount of those instruments. WesBanco uses the same credit policies in making commitments and conditional obligations as for all other lending. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The allowance for credit losses associated with commitments was ($0.6) million as of both March 31, 2018 and December 31, 2017, and is included in other liabilities on the Consolidated Balance Sheets.

Letters of credit are conditional commitments issued by banks to guarantee the performance of a customer to a third party. Those guarantees are primarily issued to support public and private borrowing arrangements, including normal business activities, bond financing and similar transactions. Letters of credit are considered guarantees. The liability associated with letters of credit was $0.2 million as of both March 31, 2018 and December 31, 2017.

Contingent obligations and other guarantees include affordable housing plan guarantees, credit card guarantees and obligations under the FHLB’s loan purchasing program. Affordable housing plan guarantees are performance guarantees for various building project loans. The guarantee amortizes as the loan balances decrease. Credit card guarantees are credit card balances not owned by WesBanco, whereby the Bank guarantees the performance of the cardholder. The mortgages sold to FHLB obligate WesBanco to reimburse the FHLB for a portion of the loan balances that default.

The following table presents total commitments to extend credit, guarantees and various letters of credit outstanding:

	March 31,		December 31,
(unaudited, in thousands)	2018		2017
Lines of credit	$	1,464,970	$	1,452,697
Loans approved but not closed		358,367		245,644
Overdraft limits		124,752		126,671
Letters of credit		31,947		31,951
Contingent obligations and other guarantees		6,796		6,700

Contingent Liabilities — WesBanco is a party to various legal and administrative proceedings and claims. While any litigation contains an element of uncertainty, management does not believe that a material loss related to such proceedings or claims pending or known to be threatened is reasonably possible.

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Business Segments

3 Months Ended

Mar. 31, 2018

Segment Reporting [Abstract]

Business Segments

NOTE 11. BUSINESS SEGMENTS

WesBanco operates two reportable segments: community banking and trust and investment services. WesBanco’s community banking segment offers services traditionally offered by full-service commercial banks, including commercial demand, individual demand and time deposit accounts, as well as commercial, mortgage and individual installment loans, and certain non-traditional offerings, such as insurance and securities brokerage services. The trust and investment services segment offers trust services as well as various alternative investment products including mutual funds. The market value of assets managed or held in custody by the trust and investment services segment was approximately $4.0 billion and $3.8 billion at March 31, 2018 and 2017, respectively. These assets are held by WesBanco in fiduciary or agency capacities for their customers and therefore are not included as assets on WesBanco’s Consolidated Balance Sheets.

Condensed financial information by business segment is presented below:

			Trust and
	Community		Investment
(unaudited, in thousands)	Banking		Services		Consolidated
For the Three Months ended March 31, 2018:
Interest and dividend income	$	86,417	$	—	$	86,417
Interest expense		13,125		—		13,125
Net interest income		73,292		—		73,292
Provision for credit losses		2,168		—		2,168
Net interest income after provision for credit losses		71,124		—		71,124
Non-interest income		17,477		6,503		23,980
Non-interest expense		50,894		3,677		54,571
Income before provision for income taxes		37,707		2,826		40,533
Provision for income taxes		6,411		593		7,004
Net income	$	31,296	$	2,233	$	33,529
For the Three Months ended March 31, 2017:
Interest and dividend income	$	79,924	$	—	$	79,924
Interest expense		9,205		—		9,205
Net interest income		70,719		—		70,719
Provision for credit losses		2,711		—		2,711
Net interest income after provision for credit losses		68,008		—		68,008
Non-interest income		16,741		6,143		22,884
Non-interest expense		50,992		3,392		54,384
Income before provision for income taxes		33,757		2,751		36,508
Provision for income taxes		9,522		1,100		10,622
Net income	$	24,235	$	1,651	$	25,886

Total non-fiduciary assets of the trust and investment services segment were $1.8 million and $3.8 million at March 31, 2018 and 2017, respectively. All other assets, including goodwill and other intangible assets, were allocated to the community banking segment.

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Subsequent Events

3 Months Ended

Mar. 31, 2018

Subsequent Events [Abstract]

Subsequent Events

NOTE 12. SUBSEQUENT EVENTS

On April 5, 2018, WesBanco completed its acquisition of First Sentry Bancshares, Inc. (“FTSB”), a bank holding company headquartered in Huntington, West Virginia. As of March 31, 2018, FTSB had approximately $705.1 million in assets excluding goodwill, $577.4 million in total deposits, $459.5 million in total loans and 5 branches in West Virginia. The acquisition was valued at approximately $107.5 million and resulted in WesBanco issuing approximately 2.5 million shares of its common stock and $1.0 million in cash in exchange for FTSB common stock. The assets and liabilities of FTSB will be recorded on WesBanco’s balance sheet at their preliminary estimated fair values as of April 5, 2018, the acquisition date, and FTSB’s results of operations will be included in WesBanco’s Consolidated Statements of Income from that date. For the three months ended March 31, 2018, WesBanco recorded merger-related expenses of $0.2 million associated with the FTSB acquisition. WesBanco accounts for business combinations using the acquisition method of accounting. The initial accounting and determination of the fair values of the assets and liabilities resulting from the acquisition was incomplete at the time of this filing due to the timing of the closing of the acquisition in relation to WesBanco’s required Form 10-Q filing deadline. A more complete disclosure of the business combination is expected to be reported in WesBanco’s Form 10-Q as of June 30, 2018.

On April 19, 2018, WesBanco and Farmers Capital Bank Corporation (“Farmers”), a bank holding company headquartered in Frankfort, Kentucky with approximately $1.7 billion in assets, $1.4 billion in deposits, $1.0 billion in loans and 34 branches, jointly announced that a definitive Agreement and Plan of Merger was executed providing for the merger of Farmers with and into WesBanco. On the date of the announcement, the transaction was valued at approximately $378.2 million. Under the terms of the Agreement and Plan of Merger, which has been approved by that board of directors of both companies, WesBanco will exchange a combination of its common stock and cash for Farmers common stock. Farmers shareholders will be entitled to receive 1.053 shares of WesBanco common stock and cash in the amount of $5.00 per share for each share of Farmers’common stock for a total value of approximately $50.31 per share at the date of announcement. The receipt by Farmers’ shareholders of shares of WesBanco common stock in exchange for their shares of Farmers common stock is anticipated to qualify as a tax-free exchange. The acquisition is subject to the approvals of the appropriate banking regulatory authorities and the shareholders of Farmers. It is expected that the transaction will be completed in the third or fourth quarter of 2018.

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Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2018

Accounting Policies [Abstract]

Basis of presentation

Basis of presentation — The accompanying unaudited interim financial statements of WesBanco, Inc. and its consolidated subsidiaries (“WesBanco”) have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements and should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2017.

WesBanco’s interim financial statements have been prepared following the significant accounting policies disclosed in Note 1 of the Notes to the Consolidated Financial Statements of its 2017 Annual Report on Form 10-K filed with the Securities and Exchange Commission. In the opinion of management, the accompanying interim financial information reflects all adjustments, including normal recurring adjustments, necessary to present fairly WesBanco’s financial position and results of operations for each of the interim periods presented. Certain prior period amounts have been reclassified to conform to the current period presentation. Such reclassifications had no impact on WesBanco’s net income and stockholders’ equity. Results of operations for interim periods are not necessarily indicative of the results of operations that may be expected for a full year.

Recent accounting pronouncements

Recent accounting pronouncements — In August 2017, the FASB issued ASU No. 2017-12, “Targeted Improvements to Accounting for Hedging Activities.” The new guidance will make more financial and nonfinancial hedging strategies eligible for hedge accounting. It also amends the presentation and disclosure requirements and changes how companies assess effectiveness. It is intended to more closely align hedge accounting with companies’ risk management strategies, simplify the application of hedge accounting, and increase transparency as to the scope and results of hedging programs. The guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. Early adoption is permitted, including adoption in an interim period. WesBanco is assessing the impact of ASU 2017-12 on WesBanco’s Consolidated Financial Statements.

In March 2017, the FASB issued ASU 2017-07 that changes how an employer presents the net periodic benefit cost in the income statement for an employer-sponsored defined benefit pension and/or other postretirement benefit plans. Employers will present the service cost component of net periodic benefit cost in the same income statement line item as other employee compensation costs arising from services rendered during the period. Only the service cost component will be eligible for capitalization in assets. Employers will present the other components of the net periodic benefit cost separately from the line items that includes the service cost outside of any subtotal of operating income, if one is presented. These components will not be eligible for capitalization in assets. For public business entities, the amendments in this update are effective for annual reporting periods beginning after December 15, 2017, including interim reporting periods within those annual reporting periods. Early adoption is permitted as of the beginning of an annual period (i.e., only in the first interim period). For WesBanco, this update was effective for the fiscal year beginning January 1, 2018. Upon adoption, WesBanco reclassified the service cost component from employee benefits to salaries and wages, which are both components of non-interest expense. The service cost component for the three months ended March 31, 2018 was $0.7 million.

In January 2017, the FASB issued ASU No. 2017-01, which clarifies the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. ASU 2017-01 will be effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017, which for WesBanco was effective for the fiscal year beginning January 1, 2018. The adoption of this pronouncement did not have a material impact on WesBanco’s Consolidated Financial Statements.

In October 2016, the FASB issued ASU 2016-16 that provides the recognition of income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. Current guidance prohibits the recognition of current and deferred income taxes for an intra-entity asset transfer until the asset has been sold to an outside party. This prohibition on recognition is an exception to the principle of comprehensive recognition of current and deferred income taxes in generally accepted accounting principles. The exception has led to diversity in practice and is a source of complexity in financial reporting. FASB decided that an entity should recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. Consequently, the amendments in this update eliminate the exception for an intra-entity transfer of an asset other than inventory. The amendments in this update do not include new disclosure requirements; however, existing disclosure requirements might be applicable when accounting for the current and deferred income taxes for an intra-entity transfer of an asset other than inventory. For public business entities, the amendments in this update are effective for annual reporting periods beginning after December 15, 2017, including interim reporting periods within those annual reporting periods, which for WesBanco was effective for the fiscal year beginning January 1, 2018. The amendments in this update should be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The adoption of this pronouncement did not have a material impact on WesBanco’s Consolidated Financial Statements.

In August 2016, the FASB issued ASU 2016-15 that provides guidance for the classification of cash flows related to (1) debt prepayment or extinguishment costs, (2) settlement of zero-coupon debt instruments or other debt instruments with coupon rates that are insignificant in relation to the effective interest rate on 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, (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. Public business entities must apply the new requirements for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years, which for WesBanco was effective for the fiscal year beginning January 1, 2018. Early adoption is permitted. The adoption of this pronouncement did not have a material impact on WesBanco’s Consolidated Financial Statements.

In June 2016, the FASB issued ASU 2016-13 that will require entities to use a new forward-looking “expected loss” model on trade and other receivables, held-to-maturity debt securities, loans and other instruments that generally will result in the earlier recognition of allowances for credit losses. For available-for-sale debt securities with unrealized losses, entities will measure credit losses in a manner similar to what they do today, except that the losses will be recognized as allowances rather than reductions in the amortized cost of the securities. Entities will have to disclose significantly more information, including information they use to track credit quality by year of origination for most financing receivables. Public business entities must apply the new requirements for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years, which for WesBanco will be effective for the fiscal year beginning January 1, 2020. Early adoption is permitted for fiscal years beginning after December 15, 2018. WesBanco is currently evaluating the impact of the adoption of this pronouncement on WesBanco’s Consolidated Financial Statements.

In February 2016, the FASB issued ASU 2016-02 that will require entities to recognize lease assets and lease liabilities on the balance sheet and disclose key information about leasing arrangements. The principal difference from previous guidance is that the lease assets and lease liabilities arising from operating leases were not previously recognized in the balance sheet. Public business entities must apply the new requirements for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. In January 2018, the FASB issued ASU 2018-01, which allows entities the option to apply the provisions of the new lease guidance at the effective date without adjusting the comparative periods presented. While we are currently assessing the impact of the adoption of this pronouncement, we expect the primary impact to our consolidated financial position upon adoption will be the recognition, on a discounted basis, of our minimum commitments under non-cancellable operating leases on our consolidated Balance Sheets resulting in the recording of right of use assets and lease obligations.

In January 2016, the FASB issued ASU 2016-01 that will require entities to measure equity investments that do not result in consolidation and are not accounted for under the equity method at fair value and recognize any changes in fair value in net income unless the investments qualify for the new practicability exception. The standard does not change the guidance for classifying and measuring investments in debt securities and loans. Entities will have to record changes in instrument-specific credit risk for financial liabilities measured under the fair value option in other comprehensive income. Public business entities must apply the new requirements for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. In February 2018, the FASB issued ASU 2018-03, which clarifies certain aspects of the guidance issued in ASU 2016-01. WesBanco adopted these pronouncements as of January 1, 2018 and recognized a $1.1 million adjustment to retained earnings upon adoption of this pronouncement. In addition, WesBanco reclassified investment securities on the Consolidated Financial Statements into the following – equity securities, available-for-sale debt securities and held-to-maturity debt securities.

In May 2014, the FASB issued ASU 2014-09 related to the recognition of revenue from contracts with customers. The new revenue pronouncement creates a single source of revenue guidance for all companies in all industries and is more principles-based than current revenue guidance. The pronouncement provides a five-step model for a company to recognize revenue when it transfers control of goods or services to customers at an amount that reflects the consideration to which it expects to be entitled in exchange for those goods or services. The five steps are, (1) identify the contract with the customer, (2) identify the separate performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price to the separate performance obligations and (5) recognize revenue when each performance obligation is satisfied. On July 9, 2015, the FASB approved a one-year deferral of the effective date of the update. The update is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017. In March 2016, the FASB issued ASU 2016-08, which amends the principle versus agent guidance in the revenue standard. In April 2016, the FASB issued ASU 2016-10, which clarifies when promised goods or services are separately identifiable in the revenue standard. In May 2016, FASB issued ASU 2016-12, which provides narrow-scope improvements and practical expedients to the revenue standard. WesBanco adopted these pronouncements as of January 1, 2018 using the modified retrospective approach. WesBanco noted no material change to the timing of revenue recognition and there was no material impact on WesBanco’s Consolidated Financial Statements. See Note 8, Revenue Recognition for further discussion on revenue within the scope of ASC 606.

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Earnings Per Common Share (Tables)

3 Months Ended

Mar. 31, 2018

Earnings Per Share [Abstract]

Summary of Earnings Per Common Share

Earnings per common share are calculated as follows:

	For the Three Months Ended March 31,
(unaudited, in thousands, except shares and per share amounts)	2018		2017
Numerator for both basic and diluted earnings per common share:
Net income	$	33,529	$	25,886
Denominator:
Total average basic common shares outstanding		44,050,701		43,947,563
Effect of dilutive stock options and other stock compensation		117,541		73,202
Total diluted average common shares outstanding		44,168,242		44,020,765
Earnings per common share – basic	$	0.76	$	0.59
Earnings per common share – diluted	$	0.76	$	0.59

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Securities (Tables)

3 Months Ended

Mar. 31, 2018

Investments, Debt and Equity Securities [Abstract]

Schedule of Fair Value and Amortized Cost of Available-for-sale and Held-to-maturity Debt Securities

The following table presents the fair value and amortized cost of available-for-sale and held-to-maturity debt securities:

	March 31, 2018									December 31, 2017
(unaudited, in thousands)	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 debt securities
U.S. Treasury	$	9,900	$	—	$	(6	)	$	9,894	$	—	$	—	$	—		$	—
U.S. Government sponsored entities and agencies		98,166		1		(1,709	)		96,458		72,425		24		(606	)		71,843
Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies		1,377,904		214		(33,708	)		1,344,410		954,115		214		(19,407	)		934,922
Commerical mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies		144,568		19		(3,661	)		140,926		116,448		4		(1,585	)		114,867
Obligations of states and political subdivisions		100,531		2,093		(1,193	)		101,431		102,363		2,927		(460	)		104,830
Corporate debt securities		35,219		170		(131	)		35,258		35,234		228		(59	)		35,403
Total available-for-sale debt securities	$	1,766,288	$	2,497	$	(40,408	)	$	1,728,377	$	1,280,585	$	3,397	$	(22,117	)	$	1,261,865
Held-to-maturity debt securities
U.S. Government sponsored entities and agencies	$	11,263	$	—	$	(373	)	$	10,890	$	11,465	$	—	$	(325	)	$	11,140
Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies		162,904		301		(4,987	)		158,218		170,025		544		(2,609	)		167,960
Obligations of states and political subdivisions		798,536		10,510		(5,838	)		803,208		794,655		17,364		(1,609	)		810,410
Corporate debt securities		33,339		82		(235	)		33,186		33,355		919		—			34,274
Total held-to-maturity debt securities	$	1,006,042	$	10,893	$	(11,433	)	$	1,005,502	$	1,009,500	$	18,827	$	(4,543	)	$	1,023,784
Total debt securities	$	2,772,330	$	13,390	$	(51,841	)	$	2,733,879	$	2,290,085	$	22,224	$	(26,660	)	$	2,285,649

Schedule of Fair Value of Available-for-sale and Held-to-maturity Debt Securities by Contractual Maturity

The following table presents the fair value of available-for-sale and held-to-maturity debt securities by contractual maturity at March 31, 2018. In some instances, the issuers may have the right to call or prepay obligations without penalty prior to the contractual maturity date.

	March 31, 2018
(unaudited, in thousands)	One Year or less		One to Five Years		Five to Ten Years		After Ten Years		Mortgage-backed securities		Total
Available-for-sale debt securities
U.S. Treasury	$	9,894	$	—	$	—	$	—	$	—	$	9,894
U.S. Government sponsored entities and agencies		9,945		1,961		16,671		6,864		61,017		96,458
Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies (1)		—		—		—		—		1,344,410		1,344,410
Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies (1)		—		—		—		—		140,926		140,926
Obligations of states and political subdivisions		3,686		17,368		40,161		40,216		—		101,431
Corporate debt securities		3,991		26,299		4,968		—		—		35,258
Total available-for-sale debt securities	$	27,516	$	45,628	$	61,800	$	47,080	$	1,546,353	$	1,728,377
Held-to-maturity debt securities (2)
U.S. Government sponsored entities and agencies	$	—	$	—	$	—	$	—	$	10,890	$	10,890
Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies (1)				—		—		—		158,218		158,218
Obligations of states and political subdivisions		6,872		114,768		398,845		282,723		—		803,208
Corporate debt securities		—		7,504		25,682		—		—		33,186
Total held-to-maturity debt securities	$	6,872	$	122,272	$	424,527	$	282,723	$	169,108	$	1,005,502
Total debt securities	$	34,388	$	167,900	$	486,327	$	329,803	$	1,715,461	$	2,733,879

⁽¹⁾ Mortgage-backed and collateralized mortgage securities, which have prepayment provisions, are not assigned to maturity categories due to fluctuations in their prepayment speeds.

⁽²⁾  The held-to-maturity debt securities portfolio is carried at an amortized cost of $1.0 billion.

Schedule of Gross Realized Gains and Losses on the Sales and Calls of Securities as well as Gains and Losses on Equity Securities

The following table presents the gross realized gains and losses on sales and calls of available-for-sale and held-to-maturity debt securities, as well as gains and losses on equity securities for the three months ended March 31, 2018 and 2017, respectively.

	For the Three Months Ended March 31,
(unaudited, in thousands)	2018			2017
Debt securities:
Gross realized gains	$	7		$	12
Gross realized losses		(18	)		—
Net (losses) gains on debt securities	$	(11	)	$	12
Equity securities:
Unrealized (losses) gains recognized on securities still held	$	(28	)	$	—
Net realized (losses) gains recognized on securities sold		—			—
Net (losses) gains on equity securities	$	(28	)	$	—
Net securities (losses) gains	$	(39	)	$	12

Schedule of Unrealized Losses on Debt Securities

The following tables provide information on unrealized losses on debt securities that have been in an unrealized loss position for less than twelve months and twelve months or more as of March 31, 2018 and December 31, 2017:

	March 31, 2018
	Less than 12 months							12 months or more							Total
	Fair		Unrealized			# of		Fair		Unrealized			# of		Fair		Unrealized			# of
(unaudited, dollars in thousands)	Value		Losses			Securities		Value		Losses			Securities		Value		Losses			Securities
U.S. Treasury	$	9,894	$	(6	)		1	$	—	$	—			—	$	9,894	$	(6	)		1
U.S. Government sponsored entities and agencies		59,280		(1,129	)		8		41,203		(953	)		8		100,483		(2,082	)		16
Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies		785,806		(13,021	)		128		602,202		(25,674	)		195		1,388,008		(38,695	)		323
Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies		101,309		(2,780	)		12		23,376		(881	)		4		124,685		(3,661	)		16
Obligations of states and political subdivisions		335,762		(4,776	)		527		72,751		(2,255	)		152		408,513		(7,031	)		679
Corporate debt securities		35,405		(352	)		12		1,974		(14	)		1		37,379		(366	)		13
Total temporarily impaired securities	$	1,327,456	$	(22,064	)		688	$	741,506	$	(29,777	)		360	$	2,068,962	$	(51,841	)		1,048
	December 31, 2017
	Less than 12 months							12 months or more							Total
	Fair		Unrealized			# of		Fair		Unrealized			# of		Fair		Unrealized			# of
(unaudited, dollars in thousands)	Value		Losses			Securities		Value		Losses			Securities		Value		Losses			Securities
U.S. Government sponsored entities and agencies	$	24,776	$	(160	)		4	$	42,248	$	(771	)		8	$	67,024	$	(931	)		12
Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies		423,794		(5,039	)		87		637,461		(16,977	)		193		1,061,255		(22,016	)		280
Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies		79,061		(1,089	)		10		27,852		(496	)		6		106,913		(1,585	)		16
Obligations of states and political subdivisions		132,831		(852	)		210		77,554		(1,217	)		160		210,385		(2,069	)		370
Corporate debt securities		4,015		(19	)		1		1,948		(40	)		1		5,963		(59	)		2
Total temporarily impaired securities	$	664,477	$	(7,159	)		312	$	787,063	$	(19,501	)		368	$	1,451,540	$	(26,660	)		680

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Loans and the Allowance for Credit Losses (Tables)

3 Months Ended

Mar. 31, 2018

Receivables [Abstract]

Schedule of Recorded Investment in Loans by Category

The recorded investment in loans is presented in the Consolidated Balance Sheets net of deferred loan fees and costs, and discounts on purchased loans. The net deferred loan costs were $1.9 million and $1.6 million at March 31, 2018 and December 31, 2017, respectively. The unamortized discount on purchased loans from acquisitions was $20.8 million, including $10.0 million related to YCB, and $21.9 million at March 31, 2018 and December 31, 2017, respectively.

(unaudited, in thousands)	March 31, 2018		December 31, 2017
Commercial real estate:
Land and construction	$	440,896	$	392,597
Improved property		2,574,330		2,601,851
Total commercial real estate		3,015,226		2,994,448
Commercial and industrial		1,118,333		1,125,327
Residential real estate		1,345,993		1,353,301
Home equity		523,425		529,196
Consumer		319,561		339,169
Total portfolio loans		6,322,538		6,341,441
Loans held for sale		12,962		20,320
Total loans	$	6,335,500	$	6,361,761

Summary of Changes in Allowance for Credit Losses

The following tables summarize changes in the allowance for credit losses applicable to each category of the loan portfolio:

	Allowance for Credit Losses By Category
	For the Three Months Ended March 31, 2018 and 2017
	Commercial			Commercial
	Real Estate-			Real Estate-
	Land and			Improved			Commercial			Residential			Home						Deposit
(unaudited, in thousands)	Construction			Property			& Industrial			Real Estate			Equity			Consumer			Overdraft			Total
Balance at December 31, 2017:
Allowance for loan losses	$	3,117		$	21,166		$	9,414		$	3,206		$	4,497		$	3,063		$	821		$	45,284
Allowance for loan commitments		119			26			173			7			212			37			—			574
Total beginning allowance for credit losses		3,236			21,192			9,587			3,213			4,709			3,100			821			45,858
Provision for credit losses:
Provision for loan losses		1,090			(895	)		919			202			262			583			(48	)		2,113
Provision for loan commitments		57			(5	)		3			—			(4	)		4			—			55
Total provision for credit losses		1,147			(900	)		922			202			258			587			(48	)		2,168
Charge-offs		—			(279	)		(109	)		(287	)		(576	)		(1,125	)		(267	)		(2,643	)
Recoveries		117			287			270			131			120			546			109			1,580
Net charge-offs		117			8			161			(156	)		(456	)		(579	)		(158	)		(1,063	)
Balance at March 31, 2018:
Allowance for loan losses		4,324			20,279			10,494			3,252			4,303			3,067			615			46,334
Allowance for loan commitments		176			21			176			7			208			41			—			629
Total ending allowance for credit losses	$	4,500		$	20,300		$	10,670		$	3,259		$	4,511		$	3,108		$	615		$	46,963
Balance at December 31, 2016:
Allowance for loan losses	$	4,348		$	18,628		$	8,412		$	4,106		$	3,422		$	3,998		$	760		$	43,674
Allowance for loan commitments		151			17			188			9			162			44			—			571
Total beginning allowance for credit losses		4,499			18,645			8,600			4,115			3,584			4,042			760			44,245
Provision for credit losses:
Provision for loan losses		(425	)		983			832			330			365			583			66			2,734
Provision for loan commitments		(8	)		—			(31	)		1			17			(2	)		—			(23	)
Total provision for credit losses		(433	)		983			801			331			382			581			66			2,711
Charge-offs		—			(602	)		(880	)		(404	)		(108	)		(1,287	)		(338	)		(3,619	)
Recoveries		52			251			376			78			48			369			98			1,272
Net charge-offs		52			(351	)		(504	)		(326	)		(60	)		(918	)		(240	)		(2,347	)
Balance at March 31, 2017:
Allowance for loan losses		3,975			19,260			8,740			4,110			3,727			3,663			586			44,061
Allowance for loan commitments		143			17			157			10			179			42			—			548
Total ending allowance for credit losses	$	4,118		$	19,277		$	8,897		$	4,120		$	3,906		$	3,705		$	586		$	44,609

Allowance for Credit Losses and Recorded Investments in Loans

The following tables present the allowance for credit losses and recorded investments in loans by category:

	Allowance for Credit Losses and Recorded Investment in Loans
	Commercial		Commercial
	Real Estate-		Real Estate-		Commercial		Residential						Deposit
	Land and		Improved		and		Real		Home				Over-
(unaudited, in thousands)	Construction		Property		Industrial		Estate		Equity		Consumer		draft		Total
March 31, 2018
Allowance for credit losses:
Allowance for loans individually evaluated for impairment	$	—	$	387	$	—	$	—	$	—	$	—	$	—	$	387
Allowance for loans collectively evaluated for impairment		4,324		19,892		10,494		3,252		4,303		3,067		615		45,947
Allowance for loan commitments		176		21		176		7		208		41		—		629
Total allowance for credit losses	$	4,500	$	20,300	$	10,670	$	3,259	$	4,511	$	3,108	$	615	$	46,963
Portfolio loans:
Individually evaluated for impairment(1)	$	—	$	2,104	$	—	$	—	$	—	$	—	$	—	$	2,104
Collectively evaluated for impairment		439,480		2,567,367		1,117,607		1,345,290		523,425		319,561		—		6,312,730
Acquired with deteriorated credit quality		1,416		4,859		726		703		—		—		—		7,704
Total portfolio loans	$	440,896	$	2,574,330	$	1,118,333	$	1,345,993	$	523,425	$	319,561	$	—	$	6,322,538
December 31, 2017
Allowance for credit losses:
Allowance for loans individually evaluated for impairment	$	—	$	388	$	—	$	—	$	—	$	—	$	—	$	388
Allowance for loans collectively evaluated for impairment		3,117		20,778		9,414		3,206		4,497		3,063		821		44,896
Allowance for loan commitments		119		26		173		7		212		37		—		574
Total allowance for credit losses	$	3,236	$	21,192	$	9,587	$	3,213	$	4,709	$	3,100	$	821	$	45,858
Portfolio loans:
Individually evaluated for impairment(1)	$	—	$	3,344	$	—	$	—	$	—	$	—	$	—	$	3,344
Collectively evaluated for impairment		391,140		2,593,393		1,124,544		1,352,587		529,196		339,163		—		6,330,023
Acquired with deteriorated credit quality		1,457		5,114		783		714		—		6		—		8,074
Total portfolio loans	$	392,597	$	2,601,851	$	1,125,327	$	1,353,301	$	529,196	$	339,169	$	—	$	6,341,441

⁽¹⁾  Commercial loans greater than $1 million that are reported as non-accrual or as a TDR are individually evaluated for impairment.

Summary of Commercial Loans by Risk Grade

The following tables summarize commercial loans by their assigned risk grade:

	Commerical Loans by Internally Assigned Risk Grade
(unaudited, in thousands)	Commercial Real Estate- Land and Construction		Commercial Real Estate- Improved Property		Commercial & Industrial		Total Commercial Loans
As of March 31, 2018
Pass	$	434,665	$	2,526,334	$	1,104,209	$	4,065,208
Criticized - compromised		3,384		24,807		5,594		33,785
Classified - substandard		2,847		23,189		8,530		34,566
Classified - doubtful		—		—		—		—
Total	$	440,896	$	2,574,330	$	1,118,333	$	4,133,559
As of December 31, 2017
Pass	$	386,753	$	2,548,805	$	1,110,267	$	4,045,825
Criticized - compromised		2,984		25,673		7,435		36,092
Classified - substandard		2,860		27,373		7,625		37,858
Classified - doubtful		—		—		—		—
Total	$	392,597	$	2,601,851	$	1,125,327	$	4,119,775

Summary of Changes in Accretable Yield for Loans Acquired with Deteriorated Credit Quality

The following table provides changes in accretable yield for loans acquired with deteriorated credit quality:

	For the Three Months Ended
(unaudited, in thousands)	March 31, 2018			March 31, 2017
Balance at beginning of period	$	1,724		$	1,717
Acquisitions		—			—
Reduction due to change in projected cash flows		(86	)		(200	)
Reclass from non-accretable difference		2,841			174
Transfers out		—			—
Accretion		(268	)		(151	)
Balance at end of period	$	4,211		$	1,540

Summary of Age Analysis of Loan Categories

The following tables summarize the age analysis of all categories of loans:

	Age Analysis of Loans
(unaudited, in thousands)	Current		30-59 Days Past Due		60-89 Days Past Due		90 Days or More Past Due		Total Past Due		Total Loans		90 Days or More Past Due and Accruing (1)
As of March 31, 2018
Commercial real estate:
Land and construction	$	439,926	$	—	$	—	$	970	$	970	$	440,896	$	172
Improved property		2,559,491		4,431		528		9,880		14,839		2,574,330		364
Total commercial real estate		2,999,417		4,431		528		10,850		15,809		3,015,226		536
Commercial and industrial		1,115,453		667		201		2,012		2,880		1,118,333		21
Residential real estate		1,333,175		3,860		1,618		7,340		12,818		1,345,993		561
Home equity		517,172		2,654		682		2,917		6,253		523,425		251
Consumer		316,517		1,950		432		662		3,044		319,561		210
Total portfolio loans		6,281,734		13,562		3,461		23,781		40,804		6,322,538		1,579
Loans held for sale		12,962		—		—		—		—		12,962		—
Total loans	$	6,294,696	$	13,562	$	3,461	$	23,781	$	40,804	$	6,335,500	$	1,579
Impaired loans included above are as follows:
Non-accrual loans	$	8,120	$	1,310	$	754	$	22,202	$	24,266	$	32,386
TDRs accruing interest (1)		6,435		230		193		—		423		6,858
Total impaired	$	14,555	$	1,540	$	947	$	22,202	$	24,689	$	39,244
As of December 31, 2017
Commercial real estate:
Land and construction	$	392,189	$	—	$	172	$	236	$	408	$	392,597	$	—
Improved property		2,589,704		374		1,200		10,573		12,147		2,601,851		243
Total commercial real estate		2,981,893		374		1,372		10,809		12,555		2,994,448		243
Commercial and industrial		1,121,957		572		196		2,602		3,370		1,125,327		20
Residential real estate		1,338,240		4,487		2,376		8,198		15,061		1,353,301		1,113
Home equity		522,584		2,135		683		3,794		6,612		529,196		742
Consumer		334,723		2,466		842		1,138		4,446		339,169		608
Total portfolio loans		6,299,397		10,034		5,469		26,541		42,044		6,341,441		2,726
Loans held for sale		20,320		—		—		—		—		20,320		—
Total loans	$	6,319,717	$	10,034	$	5,469	$	26,541	$	42,044	$	6,361,761	$	2,726
Impaired loans included above are as follows:
Non-accrual loans	$	9,195	$	1,782	$	2,033	$	23,815	$	27,630	$	36,825
TDRs accruing interest (1)		6,055		348		168		—		516		6,571
Total impaired	$	15,250	$	2,130	$	2,201	$	23,815	$	28,146	$	43,396

⁽¹⁾ Loans 90 days or more past due and accruing interest exclude TDRs 90 days or more past due and accruing interest.

Summary of Impaired Loans

The following tables summarize impaired loans:

	Impaired Loans
	March 31, 2018						December 31, 2017
	Unpaid Principal Balance (1)		Recorded Investment		Related Allowance		Unpaid Principal Balance (1)		Recorded Investment		Related Allowance
(unaudited, in thousands)
With no related specific allowance recorded:
Commercial real estate:
Land and construction	$	873	$	800	$	—	$	412	$	239	$	—
Improved property		14,554		10,319		—		18,229		12,863		—
Commercial and industrial		3,045		2,496		—		3,745		3,086		—
Residential real estate		19,601		17,751		—		20,821		18,982		—
Home equity		5,771		4,971		—		5,833		5,169		—
Consumer		918		803		—		1,084		952		—
Total impaired loans without a specific allowance		44,762		37,140		—		50,124		41,291		—
With a specific allowance recorded:
Commercial real estate:
Land and construction		—		—		—		—		—		—
Improved property		2,104		2,104		387		2,105		2,105		388
Commercial and industrial		—		—		—		—		—		—
Total impaired loans with a specific allowance		2,104		2,104		387		2,105		2,105		388
Total impaired loans	$	46,866	$	39,244	$	387	$	52,229	$	43,396	$	388

⁽¹⁾ The difference between the unpaid principal balance and the recorded investment generally reflects amounts that have been previously charged-off and fair market value adjustments on acquired impaired loans.

	Impaired Loans
	For the Three Months Ended March 31, 2018				For the Three Months Ended March 31, 2017
	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
(unaudited, in thousands)
With no related specific allowance recorded:
Commercial real estate:
Land and construction	$	520	$	—	$	588	$	—
Improved property		11,591		345		9,620		346
Commercial and industrial		2,791		2		3,812		2
Residential real estate		18,367		66		18,448		69
Home equity		5,070		5		4,186		5
Consumer		878		3		761		2
Total impaired loans without a specific allowance		39,217		421		37,415		424
With a specific allowance recorded:
Commercial real estate:
Land and construction		—		—		—		—
Improved property		2,105		—		4,927		—
Commercial and industrial		—		—		635		—
Total impaired loans with a specific allowance		2,105		—		5,562		—
Total impaired loans	$	41,322	$	421	$	42,977	$	424

Recorded Investment in Non-Accrual Loans and TDRs

The following tables present the recorded investment in non-accrual loans and TDRs:

	Non-accrual Loans (1)
(unaudited, in thousands)	March 31, 2018		December 31, 2017
Commercial real estate:
Land and construction	$	800	$	239
Improved property		10,821		13,318
Total commercial real estate		11,621		13,557
Commercial and industrial		2,373		2,958
Residential real estate		13,149		14,661
Home equity		4,540		4,762
Consumer		703		887
Total	$	32,386	$	36,825

⁽¹⁾  At March 31, 2018, there were 2 borrowers with loans greater than $1.0 million totaling $5.6 million, as compared to three borrowers with loans greater than $1.0 million totaling $6.8 million at December 31, 2017. Total non-accrual loans include loans that are also restructured. Such loans are also set forth in the following table as non-accrual TDRs.

	TDRs
	March 31, 2018						December 31, 2017
(unaudited, in thousands)	Accruing		Non-Accrual		Total		Accruing		Non-Accrual		Total
Commercial real estate:
Land and construction	$	—	$	2	$	2	$	—	$	3	$	3
Improved property		1,602		490		2,092		1,650		428		2,078
Total commercial real estate		1,602		492		2,094		1,650		431		2,081
Commercial and industrial		123		94		217		128		97		225
Residential real estate		4,602		1,525		6,127		4,321		1,880		6,201
Home equity		431		220		651		407		337		744
Consumer		100		66		166		65		120		185
Total	$	6,858	$	2,397	$	9,255	$	6,571	$	2,865	$	9,436

As of March 31, 2018 and December 31, 2017 there were no TDRs greater than $1.0 million. The concessions granted in the majority of loans reported as accruing and non-accrual TDRs are extensions of the maturity date or the amortization period, reductions in the interest rate below the prevailing market rate for loans with comparable characteristics, and/or permitting interest-only payments for longer than three months. WesBanco had unfunded commitments to debtors whose loans were classified as impaired of $0.1 million as of March 31, 2018 and December 31, 2017.

Loans Identified as TDRs

The following tables present details related to loans identified as TDRs during the three months ended March 31, 2018 and 2017, respectively:

	New TDRs (1) For the Three Months Ended
	March 31, 2018						March 31, 2017
			Pre-		Post-				Pre-		Post-
			Modification		Modification				Modification		Modification
			Outstanding		Outstanding				Outstanding		Outstanding
	Number of		Recorded		Recorded		Number of		Recorded		Recorded
(unaudited, dollars in thousands)	Modifications		Investment		Investment		Modifications		Investment		Investment
Commercial real estate:
Land and construction		—	$	—	$	—		—	$	—	$	—
Improved Property		—		—		—		—		—		—
Total commercial real estate		—		—		—		—		—		—
Commercial and industrial		—		—		—		2		126		122
Residential real estate		5		203		195		1		10		9
Home equity		—		—		—		1		44		43
Consumer		2		4		3		2		84		21
Total		7	$	207	$	198		6	$	264	$	195

⁽¹⁾  Excludes loans that were either paid off or charged-off by period end. The pre-modification balance represents the balance outstanding at the beginning of the period. The post-modification balance represents the outstanding balance at period end.

The following table summarizes TDRs which defaulted (defined as past due 90 days) during the three months ended March 31, 2018 and 2017, respectively, that were restructured within the last twelve months prior to March 31, 2018 and 2017, respectively:

	Defaulted TDRs (1)				Defaulted TDRs (1)
	For the Three Months Ended				For the Three Months Ended
	March 31, 2018				March 31, 2017
(unaudited, dollars in thousands)	Number of Defaults		Recorded Investment		Number of Defaults		Recorded Investment
Commercial real estate:
Land and construction		—	$	—		—	$	—
Improved property		—		—		—		—
Total commercial real estate		—		—		—		—
Commercial and industrial		—		—		—		—
Residential real estate		1		122		—		—
Home equity		1		7		—		—
Consumer		—		—		1		9
Total		2	$	129		1	$	9

⁽¹⁾ Excludes loans that were either charged-off or cured by period end. The recorded investment is as of March 31, 2018 and 2017, respectively.

Summary of Other Real Estate Owned and Repossessed Assets

The following table summarizes other real estate owned and repossessed assets included in other assets:

(unaudited, in thousands)	March 31, 2018		December 31, 2017
Other real estate owned	$	3,991	$	5,195
Repossessed assets		76		102
Total other real estate owned and repossessed assets	$	4,067	$	5,297

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Derivatives and Hedging Activities (Tables)

3 Months Ended

Mar. 31, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Summary of Fair Values of Derivative Instruments on Balance Sheets

The table below presents the fair value of WesBanco’s derivative financial instruments as well as their classification on the Balance Sheet as of March 31, 2018 and December 31, 2017:

	March 31, 2018						December 31, 2017
(unaudited, in thousands)	Notional or Contractual Amount		Asset Derivatives		Liability Derivatives		Notional or Contractual Amount		Asset Derivatives		Liability Derivatives
Derivatives
Loan Swaps:
Interest rate swaps	$	309,242	$	9,257	$	9,083	$	298,223	$	7,351	$	7,345
Other contracts:
Interest rate loan commitments		24,730		147		—		20,319		49		—
Best efforts forward delivery commitments		3,941		—		11		2,905		—		6
Forward TBA contracts		36,500		—		3		31,750		—		23
Total derivatives			$	9,404	$	9,097			$	7,400	$	7,374

Summary of Effect of Derivative Instruments on Income Statement

The table below presents the change in the fair value of the Company’s derivative financial instruments reflected within the other non-interest income line item of the consolidated income statement for the three months ended March 31, 2018 and 2017, respectively.

		For the Three Months Ended
	Location of Gain/(Loss)	March 31,
(unaudited, in thousands)		2018			2017
Interest rate swaps	Other income	$	(167	)	$	195
Interest rate loan commitments	Mortgage banking income		98			—
Best efforts forward sales contracts	Mortgage banking income		(5	)		—
Forward TBA contracts	Mortgage banking income		410			—
Total		$	336		$	195

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Pension Plan (Tables)

3 Months Ended

Mar. 31, 2018

Retirement Benefits [Abstract]

Components of Net Periodic Pension Cost

The following table presents the net periodic pension cost for WesBanco’s Defined Benefit Pension Plan (the “Plan”) and the related components:

	For the Three Months Ended March 31,
(unaudited, in thousands)	2018			2017
Service cost – benefits earned during year	$	699		$	636
Interest cost on projected benefit obligation		1,114			1,084
Expected return on plan assets		(2,204	)		(1,886	)
Amortization of prior service cost		6			6
Amortization of net loss		753			794
Net periodic pension cost	$	368		$	634

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Fair Value Measurement (Tables)

3 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

Schedule of Fair Value of Assets and Liabilities Measured on Recurring and Nonrecurring Basis

The following tables set forth WesBanco’s financial assets and liabilities that were accounted for at fair value on a recurring and nonrecurring basis by level within the fair value hierarchy as of March 31, 2018 and December 31, 2017:

			March 31, 2018
			Fair Value Measurements Using:
	March 31, 2018		Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs		Investments Measured at Net Asset
(unaudited, in thousands)			(level 1)		(level 2)		(level 3)		Value
Recurring fair value measurements
Equity securities	$	13,986	$	11,568	$	—	$	—	$	2,418
Debt securities - available-for-sale
U.S. Treasury		9,894		—		9,894		—		—
U.S. Government sponsored entities and agencies		96,458		—		96,458		—		—
Residential mortgage-backed securities and collateralized mortgage obligations of government agencies		1,344,410		—		1,344,410		—		—
Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies		140,926		—		140,926		—		—
Obligations of state and political subdivisions		101,431		—		101,431		—		—
Corporate debt securities		35,258		—		35,258		—		—
Total debt securities - available-for-sale	$	1,728,377	$	—	$	1,728,377	$	—	$	—
Loans held for sale		12,962		—		12,962		—		—
Other assets - interest rate derivatives agreements		9,257		—		9,257		—		—
Total assets recurring fair value measurements	$	1,764,582	$	11,568	$	1,750,596	$	—	$	2,418
Other liabilities - interest rate derivatives agreements	$	9,083	$	—	$	9,083	$	—	$	—
Total liabilities recurring fair value measurements	$	9,083	$	—	$	9,083	$	—	$	—
Nonrecurring fair value measurements
Impaired loans	$	1,717	$	—	$	—	$	1,717	$	—
Other real estate owned and repossessed assets		4,067		—		—		4,067		—
Total nonrecurring fair value measurements	$	5,784	$	—	$	—	$	5,784	$	—

			December 31, 2017
			Fair Value Measurements Using:
	December 31,		Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs		Investments Measured at Net Asset
(unaudited, in thousands)	2017		(level 1)		(level 2)		(level 3)		Value
Recurring fair value measurements
Equity securities	$	13,457	$	11,391	$	—	$	—	$	2,066
Debt securities - available-for-sale
U.S. Government sponsored entities and agencies		71,843		—		71,843		—		—
Residential mortgage-backed securities and collateralized mortgage obligations of government agencies		934,922		—		934,922		—		—
Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies		114,867		—		114,867		—		—
Obligations of state and political subdivisions		104,830		—		104,830		—		—
Corporate debt securities		35,403		—		35,403		—		—
Total debt securities - available-for-sale	$	1,261,865	$	—	$	1,261,865	$	—	$	—
Loans held for sale		20,320		—		20,320		—		—
Other assets - interest rate derivatives agreements		7,351		—		7,351		—		—
Total assets recurring fair value measurements	$	1,302,993	$	11,391	$	1,289,536	$	—	$	2,066
Other liabilities - interest rate derivatives agreements	$	7,345	$	—	$	7,345	$	—	$	—
Total liabilities recurring fair value measurements	$	7,345	$	—	$	7,345	$	—	$	—
Nonrecurring fair value measurements
Impaired loans	$	1,717	$	—	$	—	$	1,717	$	—
Other real estate owned and repossessed assets		5,297		—		—		5,297		—
Total nonrecurring fair value measurements	$	7,014	$	—	$	—	$	7,014	$	—

Schedule of Assets Measured at Fair Value on Nonrecurring Basis

The following table presents additional quantitative information about assets measured at fair value on a nonrecurring basis and for which WesBanco has utilized level 3 inputs to determine fair value:

	Quantitative Information about Level 3 Fair Value Measurements
	Fair Value		Valuation	Unobservable	Range (Weighted
(unaudited, in thousands)	Estimate		Techniques	Input	Average)
March 31, 2018
Impaired loans	$	1,717	Appraisal of collateral (1)	Appraisal adjustments (2)	(4.8%) / (4.8%)
				Liquidation expenses (2)	(7.6%) / (7.6%)
Other real estate owned and repossessed assets		4,067	Appraisal of collateral (1), (3)
December 31, 2017:
Impaired loans	$	1,717	Appraisal of collateral (1)	Appraisal adjustments (2)	(4.8%) / (4.8%)
				Liquidation expenses (2)	(7.6%) / (7.6%)
Other real estate owned and repossessed assets		5,297	Appraisal of collateral (1), (3)

⁽¹⁾ Fair value is generally determined through independent appraisals of the underlying collateral, which generally include various level 3 inputs which are not identifiable.

⁽²⁾  Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses. The range and weighted average of appraisal adjustments and liquidation expenses are presented as a percent of the appraisal.

⁽³⁾  Includes estimated liquidation expenses and numerous dissimilar qualitative adjustments by management which are not identifiable.

Estimates Fair Values of Financial Instruments

The estimated fair values of WesBanco’s financial instruments are summarized below:

					Fair Value Measurements at March 31, 2018
(unaudited, in thousands)	Carrying Amount		Fair Value Estimate		Quoted Prices in Active Markets for Identical Assets (level 1)		Significant Other Observable Inputs (level 2)		Significant Unobservable Inputs (level 3)		Investments Measured at Net Asset Value
Financial Assets
Cash and due from banks	$	100,845	$	100,845	$	100,845	$	—	$	—	$	—
Equity securities		13,986		13,986		11,568		—		—		2,418
Debt securities available-for-sale		1,728,377		1,728,377		—		1,728,377		—		—
Debt securities held-to-maturity		1,006,042		1,005,502		—		1,004,912		590		—
Net loans		6,276,204		6,158,399		—		—		6,158,399		—
Loans held for sale		12,962		12,962		—		12,962		—		—
Other assets - interest rate derivatives		9,257		9,257		—		9,257		—		—
Accrued interest receivable		31,963		31,963		31,963		—		—		—
Financial Liabilities
Deposits		7,226,326		7,230,335		6,018,657		1,211,678		—		—
Federal Home Loan Bank borrowings		1,166,939		1,161,442		—		1,161,442		—		—
Other borrowings		207,653		207,627		205,651		1,976		—		—
Subordinated debt and junior subordinated debt		164,379		149,887		—		149,887		—		—
Other liabilities - interest rate derivatives		9,083		9,083		—		9,083		—		—
Accrued interest payable		4,033		4,033		4,033		—		—		—

					Fair Value Measurements at December 31, 2017
(unaudited, in thousands)	Carrying Amount		Fair Value Estimate		Quoted Prices in Active Markets for Identical Assets (level 1)		Significant Other Observable Inputs (level 2)		Significant Unobservable Inputs (level 3)		Investments Measured at Net Asset Value
Financial Assets
Cash and due from banks	$	117,572	$	117,572	$	117,572	$	—	$	—	$	—
Equity securities		13,457		13,457		11,391		—		—		2,066
Debt securities available-for-sale		1,261,865		1,261,865		—		1,261,865		—		—
Debt securities held-to-maturity		1,009,500		1,023,784		—		1,023,191		593		—
Net loans		6,296,157		6,212,823		—		—		6,212,823		—
Loans held for sale		20,320		20,320		—		20,320		—		—
Other assets - interest rate derivatives		7,351		7,351		—		7,351		—		—
Accrued interest receivable		29,728		29,728		29,728		—		—		—
Financial Liabilities
Deposits		7,043,588		7,053,536		5,766,531		1,287,005		—		—
Federal Home Loan Bank borrowings		948,203		944,706		—		944,706		—		—
Other borrowings		184,805		184,814		182,785		2,029		—		—
Subordinated debt and junior subordinated debt		164,327		146,484		—		146,484		—		—
Other liabilities - interest rate derivatives		7,345		7,345		—		7,345		—		—
Accrued interest payable		3,178		3,178		3,178		—		—		—

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Revenue Recognition (Tables)

3 Months Ended

Mar. 31, 2018

Text Block [Abstract]

Summary of Revenue Recognition

The following table summarizes the point of revenue recognition and the income recognized for each of the revenue streams for the three months ended March 31, 2018:

(unaudited, in thousands)	Point of Revenue Recognition		For the Three Months Ended March 31, 2018
Revenue Streams
Trust Fees
Trust account fees		Over time	$	4,292
WesMark fees		Over time		2,211
Total trust fees				6,503
Service charges on deposits
Commercial banking fees		Over time		407
Personal service charges		At a point in time & Over time		4,415
Total service charges on deposits				4,822
Net securities brokerage revenue
Annuity commissions		At a point in time		1,200
Equity and debt security trades		At a point in time		102
Managed money		Over time		141
Trail commissions		Over time		227
Total net securities brokerage revenue				1,670
Electronic banking fees		At a point in time		4,829
Mortgage banking income		At a point in time		1,004
Gain/loss on sale of OREO/other assets		At a point in time		262

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Comprehensive Income/(Loss) (Tables)

3 Months Ended

Mar. 31, 2018

Equity [Abstract]

Components of Accumulated Other Comprehensive Income

The activity in accumulated other comprehensive income for the three months ended March 31, 2018 and 2017 is as follows:

	Accumulated Other Comprehensive Income/(Loss) (1)
(unaudited, in thousands)	Defined Benefit Pension Plan			Unrealized Gains (Losses) on Debt Securities Available-for-Sale			Unrealized Gains on Debt Securities Transferred from Available-for-Sale to Held-to-Maturity			Total
Balance at December 31, 2017	$	(18,626	)	$	(13,250	)	$	381		$	(31,495	)
Other comprehensive income before reclassifications		—			(14,905	)		—			(14,905	)
Amounts reclassified from accumulated other comprehensive income		437			—			(50	)		387
Period change		437			(14,905	)		(50	)		(14,518	)
Adoption of Accounting Standard ASU 2016-01 (2)		—			(1,063	)		—			(1,063	)
Balance at March 31, 2018	$	(18,189	)	$	(29,218	)	$	331		$	(47,076	)
Balance at December 31, 2016	$	(17,758	)	$	(9,890	)	$	522		$	(27,126	)
Other comprehensive income before reclassifications		—			1,680			—			1,680
Amounts reclassified from accumulated other comprehensive income		655			—			(50	)		605
Period change		655			1,680			(50	)		2,285
Balance at March 31, 2017	$	(17,103	)	$	(8,210	)	$	472		$	(24,841	)

⁽¹⁾  All amounts are net of tax. Related income tax expense or benefit is calculated using a combined Federal and State income tax rate approximating 23% in 2018 and 37% in all prior periods.

⁽²⁾  See Note 1, Summary of Significant Accounting Policies for additional information about WesBanco’s adoption of ASU 2016-01.

Schedule of Amounts Reclassified from Accumulated Other Comprehensive Income

The following table provides details about amounts reclassified from accumulated other comprehensive income for the three months ended March 31, 2018 and 2017:

Details about Accumulated Other Comprehensive Income/(Loss) Components	Amounts Reclassified from Accumulated Other Comprehensive Income/(Loss) For the Three Months Ended March 31,						Affected Line Item in the Statement of Net Income
(unaudited, in thousands)	2018			2017
Debt securities available-for-sale (1):
Net securities gains reclassified into earnings	$	—		$	—		Net securities gains (Non-interest income)
Related income tax expense		—			—		Provision for income taxes
Net effect on accumulated other comprehensive income for the period		—			—
Debt securities held-to-maturity (1):
Amortization of unrealized gain transferred from available-for-sale		(66	)		(72	)	Interest and dividends on securities (Interest and dividend income)
Related income tax expense		16			22		Provision for income taxes
Net effect on accumulated other comprehensive income for the period		(50	)		(50	)
Defined benefit pension plan (2):
Amortization of net loss and prior service costs		756			801		Employee benefits (Non-interest expense)
Related income tax benefit		(319	)		(146	)	Provision for income taxes
Net effect on accumulated other comprehensive income for the period		437			655
Total reclassifications for the period	$	387		$	605

⁽¹⁾ For additional detail related to unrealized gains on securities and related amounts reclassified from accumulated other comprehensive income, see Note 3, “Securities.”

⁽²⁾ Included in the computation of net periodic pension cost. See Note 6, “Pension Plan” for additional detail.

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Commitments and Contingent Liabilities (Tables)

3 Months Ended

Mar. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Commitments to Extend Credit, Guarantees and Various Letters of Credit Outstanding

The following table presents total commitments to extend credit, guarantees and various letters of credit outstanding:

	March 31,		December 31,
(unaudited, in thousands)	2018		2017
Lines of credit	$	1,464,970	$	1,452,697
Loans approved but not closed		358,367		245,644
Overdraft limits		124,752		126,671
Letters of credit		31,947		31,951
Contingent obligations and other guarantees		6,796		6,700

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Business Segments (Tables)

3 Months Ended

Mar. 31, 2018

Segment Reporting [Abstract]

Financial Information by Business Segment

Condensed financial information by business segment is presented below:

			Trust and
	Community		Investment
(unaudited, in thousands)	Banking		Services		Consolidated
For the Three Months ended March 31, 2018:
Interest and dividend income	$	86,417	$	—	$	86,417
Interest expense		13,125		—		13,125
Net interest income		73,292		—		73,292
Provision for credit losses		2,168		—		2,168
Net interest income after provision for credit losses		71,124		—		71,124
Non-interest income		17,477		6,503		23,980
Non-interest expense		50,894		3,677		54,571
Income before provision for income taxes		37,707		2,826		40,533
Provision for income taxes		6,411		593		7,004
Net income	$	31,296	$	2,233	$	33,529
For the Three Months ended March 31, 2017:
Interest and dividend income	$	79,924	$	—	$	79,924
Interest expense		9,205		—		9,205
Net interest income		70,719		—		70,719
Provision for credit losses		2,711		—		2,711
Net interest income after provision for credit losses		68,008		—		68,008
Non-interest income		16,741		6,143		22,884
Non-interest expense		50,992		3,392		54,384
Income before provision for income taxes		33,757		2,751		36,508
Provision for income taxes		9,522		1,100		10,622
Net income	$	24,235	$	1,651	$	25,886

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Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended
	Jan. 01, 2018	Mar. 31, 2018	Mar. 31, 2017
Summary Of Significant Accounting Policies [Line Items]
Service cost component of defined benefit plan		$ 699	$ 636
Accounting Standards Update 2016-01 [Member]
Summary Of Significant Accounting Policies [Line Items]
Adjustment to retained earnings	$ 1,100

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Earnings Per Common Share - Summary of Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Numerator for both basic and diluted earnings per common share:
Net income	$ 33,529	$ 25,886
Denominator:
Total average basic common shares outstanding	44,050,701	43,947,563
Effect of dilutive stock options and other stock compensation	117,541	73,202
Total diluted average common shares outstanding	44,168,242	44,020,765
Earnings per common share - basic	$ 0.76	$ 0.59
Earnings per common share - diluted	$ 0.76	$ 0.59

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Earnings Per Common Share - Additional Information (Detail) - shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares contingently issuable under shareholder return plan	39,216	0
Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities excluded from computation of net income per diluted shares	9,000	0

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Securities - Schedule of Fair Value and Amortized Cost of Available-for-sale and Held-to-maturity Debt Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale, Amortized Cost	$ 1,766,288	$ 1,280,585
Available-for-sale, Gross Unrealized Gains	2,497	3,397
Available-for-sale, Gross Unrealized Losses	(40,408)	(22,117)
Available-for-sale, Estimated Fair Value	1,728,377	1,261,865
Held-to-maturity, Amortized Cost	1,006,042	1,009,500
Held-to-maturity, Gross Unrealized Gains	10,893	18,827
Held-to-maturity, Gross Unrealized Losses	(11,433)	(4,543)
Held-to-maturity securities, Fair value	1,005,502	1,023,784
Total securities, Amortized Cost	2,772,330	2,290,085
Total securities, Gross Unrealized Gains	13,390	22,224
Total securities, Gross Unrealized Losses	(51,841)	(26,660)
Total securities, Estimated Fair Value	2,733,879	2,285,649
US Treasury Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale, Amortized Cost	9,900
Available-for-sale, Gross Unrealized Losses	(6)
Available-for-sale, Estimated Fair Value	9,894
U.S. Government Sponsored Entities and Agencies [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale, Amortized Cost	98,166	72,425
Available-for-sale, Gross Unrealized Gains	1	24
Available-for-sale, Gross Unrealized Losses	(1,709)	(606)
Available-for-sale, Estimated Fair Value	96,458	71,843
Held-to-maturity, Amortized Cost	11,263	11,465
Held-to-maturity, Gross Unrealized Losses	(373)	(325)
Held-to-maturity securities, Fair value	10,890	11,140
Residential Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and Agencies [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale, Amortized Cost	1,377,904	954,115
Available-for-sale, Gross Unrealized Gains	214	214
Available-for-sale, Gross Unrealized Losses	(33,708)	(19,407)
Available-for-sale, Estimated Fair Value	1,344,410	934,922
Held-to-maturity, Amortized Cost	162,904	170,025
Held-to-maturity, Gross Unrealized Gains	301	544
Held-to-maturity, Gross Unrealized Losses	(4,987)	(2,609)
Held-to-maturity securities, Fair value	158,218	167,960
Commercial Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and Agencies [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale, Amortized Cost	144,568	116,448
Available-for-sale, Gross Unrealized Gains	19	4
Available-for-sale, Gross Unrealized Losses	(3,661)	(1,585)
Available-for-sale, Estimated Fair Value	140,926	114,867
Obligations of State and Political Subdivisions [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale, Amortized Cost	100,531	102,363
Available-for-sale, Gross Unrealized Gains	2,093	2,927
Available-for-sale, Gross Unrealized Losses	(1,193)	(460)
Available-for-sale, Estimated Fair Value	101,431	104,830
Held-to-maturity, Amortized Cost	798,536	794,655
Held-to-maturity, Gross Unrealized Gains	10,510	17,364
Held-to-maturity, Gross Unrealized Losses	(5,838)	(1,609)
Held-to-maturity securities, Fair value	803,208	810,410
Corporate Debt Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale, Amortized Cost	35,219	35,234
Available-for-sale, Gross Unrealized Gains	170	228
Available-for-sale, Gross Unrealized Losses	(131)	(59)
Available-for-sale, Estimated Fair Value	35,258	35,403
Held-to-maturity, Amortized Cost	33,339	33,355
Held-to-maturity, Gross Unrealized Gains	82	919
Held-to-maturity, Gross Unrealized Losses	(235)
Held-to-maturity securities, Fair value	$ 33,186	$ 34,274

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Securities - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2018 USD ($) Holdings	Mar. 31, 2017 USD ($)	Dec. 31, 2017 USD ($) Holdings
Investments, Debt and Equity Securities [Abstract]
Maximum percentage of equity of one issuer	10.00%
Number of holdings greater than specified percentage of equity | Holdings	0		0
Equities securities	$ 13,986,000		$ 13,457,000
Securities with aggregate fair values	1,500,000,000		1,400,000,000
Net unrealized losses on available-for-sale debt securities included in AOCI	29,200,000		13,300,000
Sales of available-for-sale debt securities	0	$ 0
Impairment loss relating to securities	0
Federal home loan bank stock, Total	$ 55,600,000		$ 45,900,000

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Securities - Schedule of Fair Value of Available-for-Sale and Held-to-Maturity Debt Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Total available-for-sale securities, One Year or less	$ 27,516
Total available-for-sale securities, One to Five Years	45,628
Total available-for-sale securities, Five to Ten Years	61,800
Total available-for-sale securities, After Ten Years	47,080
Total available-for-sale securities, Mortgage-backed	1,546,353
Available-for-sale, Estimated Fair Value	1,728,377	$ 1,261,865
Total held-to-maturity securities, One Year or less	6,872
Total held-to-maturity securities, One to Five Years	122,272
Total held-to-maturity securities, Five to Ten Years	424,527
Total held-to-maturity securities, After Ten Years	282,723
Total held-to-maturity securities, Mortgage-backed	169,108
Held-to-maturity securities, Fair value	1,005,502	1,023,784
Total, One Year or less	34,388
Total, One to Five Years	167,900
Total, Five to Ten Years	486,327
Total, After Ten Years, Fair value	329,803
Total, Mortgage-backed	1,715,461
Total, Fair value	2,733,879	2,285,649
US Treasury Securities [Member]
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Total available-for-sale securities, One Year or less	9,894
Available-for-sale, Estimated Fair Value	9,894
U.S. Government Sponsored Entities and Agencies [Member]
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Total available-for-sale securities, One Year or less	9,945
Total available-for-sale securities, One to Five Years	1,961
Total available-for-sale securities, Five to Ten Years	16,671
Total available-for-sale securities, After Ten Years	6,864
Total available-for-sale securities, Mortgage-backed	61,017
Available-for-sale, Estimated Fair Value	96,458	71,843
Total held-to-maturity securities, Mortgage-backed	10,890
Held-to-maturity securities, Fair value	10,890	11,140
Residential Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and Agencies [Member]
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Total available-for-sale securities, Mortgage-backed	1,344,410
Available-for-sale, Estimated Fair Value	1,344,410	934,922
Total held-to-maturity securities, Mortgage-backed	158,218
Held-to-maturity securities, Fair value	158,218	167,960
Commercial Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and Agencies [Member]
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Total available-for-sale securities, Mortgage-backed	140,926
Available-for-sale, Estimated Fair Value	140,926	114,867
Obligations of State and Political Subdivisions [Member]
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Total available-for-sale securities, One Year or less	3,686
Total available-for-sale securities, One to Five Years	17,368
Total available-for-sale securities, Five to Ten Years	40,161
Total available-for-sale securities, After Ten Years	40,216
Available-for-sale, Estimated Fair Value	101,431	104,830
Total held-to-maturity securities, One Year or less	6,872
Total held-to-maturity securities, One to Five Years	114,768
Total held-to-maturity securities, Five to Ten Years	398,845
Total held-to-maturity securities, After Ten Years	282,723
Held-to-maturity securities, Fair value	803,208	810,410
Corporate Debt Securities [Member]
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Total available-for-sale securities, One Year or less	3,991
Total available-for-sale securities, One to Five Years	26,299
Total available-for-sale securities, Five to Ten Years	4,968
Available-for-sale, Estimated Fair Value	35,258	35,403
Total held-to-maturity securities, One to Five Years	7,504
Total held-to-maturity securities, Five to Ten Years	25,682
Held-to-maturity securities, Fair value	$ 33,186	$ 34,274

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Securities - Schedule of Fair Value of Available-for-Sale and Held-to-Maturity Debt Securities by Contractual Maturity (Parenthetical) (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Amortized Cost and Fair Value Debt Securities [Abstract]
Held-to-maturity, Amortized Cost	$ 1,006,042	$ 1,009,500

XML

Securities - Schedule of Gross Realized Gains and Losses on the Sales and Calls of Securities as well as Gains and Losses on Equity Securities (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Available-for-Sale Securities, Gross Unrealized Gain (Loss) [Line Items]
Net securities (losses) gains	$ (39)	$ 12
Debt Securities [Member]
Available-for-Sale Securities, Gross Unrealized Gain (Loss) [Line Items]
Gross realized gains	7	12
Gross realized losses	(18)
Net (losses) gains on debt securities	(11)	12
Equity Securities [Member]
Available-for-Sale Securities, Gross Unrealized Gain (Loss) [Line Items]
Unrealized (losses) gains recognized on securities still held	(28)
Net realized (losses) gains recognized on securities sold	0	$ 0
Net (losses) gains on equity securities	$ (28)

XML

Securities - Schedule of Unrealized Losses on Debt Securities (Detail) $ in Thousands	Mar. 31, 2018 USD ($) Security	Dec. 31, 2017 USD ($) Security
US Treasury Securities [Member]
Net Unrealized Gains And Losses On Investments [Line Items]
Less than 12 months, Fair Value	$ 9,894
Less than 12 months, Unrealized Losses	$ (6)
Less than 12 months, Number of Securities | Security	1
Fair Value, Total	$ 9,894
Unrealized Losses, Total	$ (6)
Number of Securities Total | Security	1
U.S. Government Sponsored Entities and Agencies [Member]
Net Unrealized Gains And Losses On Investments [Line Items]
Less than 12 months, Fair Value	$ 59,280	$ 24,776
Less than 12 months, Unrealized Losses	$ (1,129)	$ (160)
Less than 12 months, Number of Securities | Security	8	4
12 months or more, Fair Value	$ 41,203	$ 42,248
12 months or more, Unrealized Losses	$ (953)	$ (771)
12 months or more, Number of Securities | Security	8	8
Fair Value, Total	$ 100,483	$ 67,024
Unrealized Losses, Total	$ (2,082)	$ (931)
Number of Securities Total | Security	16	12
Residential Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and Agencies [Member]
Net Unrealized Gains And Losses On Investments [Line Items]
Less than 12 months, Fair Value	$ 785,806	$ 423,794
Less than 12 months, Unrealized Losses	$ (13,021)	$ (5,039)
Less than 12 months, Number of Securities | Security	128	87
12 months or more, Fair Value	$ 602,202	$ 637,461
12 months or more, Unrealized Losses	$ (25,674)	$ (16,977)
12 months or more, Number of Securities | Security	195	193
Fair Value, Total	$ 1,388,008	$ 1,061,255
Unrealized Losses, Total	$ (38,695)	$ (22,016)
Number of Securities Total | Security	323	280
Commercial Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and Agencies [Member]
Net Unrealized Gains And Losses On Investments [Line Items]
Less than 12 months, Fair Value	$ 101,309	$ 79,061
Less than 12 months, Unrealized Losses	$ (2,780)	$ (1,089)
Less than 12 months, Number of Securities | Security	12	10
12 months or more, Fair Value	$ 23,376	$ 27,852
12 months or more, Unrealized Losses	$ (881)	$ (496)
12 months or more, Number of Securities | Security	4	6
Fair Value, Total	$ 124,685	$ 106,913
Unrealized Losses, Total	$ (3,661)	$ (1,585)
Number of Securities Total | Security	16	16
Obligations of State and Political Subdivisions [Member]
Net Unrealized Gains And Losses On Investments [Line Items]
Less than 12 months, Fair Value	$ 335,762	$ 132,831
Less than 12 months, Unrealized Losses	$ (4,776)	$ (852)
Less than 12 months, Number of Securities | Security	527	210
12 months or more, Fair Value	$ 72,751	$ 77,554
12 months or more, Unrealized Losses	$ (2,255)	$ (1,217)
12 months or more, Number of Securities | Security	152	160
Fair Value, Total	$ 408,513	$ 210,385
Unrealized Losses, Total	$ (7,031)	$ (2,069)
Number of Securities Total | Security	679	370
Corporate Debt Securities [Member]
Net Unrealized Gains And Losses On Investments [Line Items]
Less than 12 months, Fair Value	$ 35,405	$ 4,015
Less than 12 months, Unrealized Losses	$ (352)	$ (19)
Less than 12 months, Number of Securities | Security	12	1
12 months or more, Fair Value	$ 1,974	$ 1,948
12 months or more, Unrealized Losses	$ (14)	$ (40)
12 months or more, Number of Securities | Security	1	1
Fair Value, Total	$ 37,379	$ 5,963
Unrealized Losses, Total	$ (366)	$ (59)
Number of Securities Total | Security	13	2
Total Temporarily Impaired Securities [Member]
Net Unrealized Gains And Losses On Investments [Line Items]
Less than 12 months, Fair Value	$ 1,327,456	$ 664,477
Less than 12 months, Unrealized Losses	$ (22,064)	$ (7,159)
Less than 12 months, Number of Securities | Security	688	312
12 months or more, Fair Value	$ 741,506	$ 787,063
12 months or more, Unrealized Losses	$ (29,777)	$ (19,501)
12 months or more, Number of Securities | Security	360	368
Fair Value, Total	$ 2,068,962	$ 1,451,540
Unrealized Losses, Total	$ (51,841)	$ (26,660)
Number of Securities Total | Security	1,048	680

XML

Loans and the Allowance for Credit Losses - Additional Information (Detail)	3 Months Ended	12 Months Ended
	Mar. 31, 2018 USD ($) Contract	Dec. 31, 2017 USD ($) Contract	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Financing Receivable, Recorded Investment [Line Items]
Deferred loan (costs) and fees	$ 1,900,000	$ 1,600,000
Unamortized discount on purchased loans from acquisitions	20,800,000	21,900,000
Aggregate amount of residential real estate, home equity and consumer loans classified as substandard	19,400,000	22,800,000
Internally assigned loan grades to residential real estate, home equity and consumer loans	1,000,000	2,500,000
Loans acquired with deteriorated credit quality	7,704,000	8,074,000
Allowance for loan losses	$ 46,334,000	$ 45,284,000	$ 44,061,000	$ 43,674,000
Number of restructured contracts greater than $1 million | Contract	0	0
Threshold for TDR	$ 1,000,000	$ 1,000,000
Accruing and non accrual TDR permitted interest-only payment period	3 months
Unfunded commitments to debtors for impaired loans	$ 100,000	100,000
Other real estate owned	3,991,000	5,195,000
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans acquired with deteriorated credit quality	726,000	783,000
Allowance for loan losses	10,494,000	9,414,000	8,740,000	8,412,000
Commercial and Industrial [Member] | Maximum [Member]
Financing Receivable, Recorded Investment [Line Items]
Annual sales of borrowers	100,000,000
Your Community Bankshares, Inc [Member]
Financing Receivable, Recorded Investment [Line Items]
Unamortized discount on purchased loans from acquisitions	10,000,000
Loans acquired with deteriorated credit quality	4,200,000	4,300,000
Loans acquired accretable	1,300,000
Allowance for loan losses	200,000	0
Your Community Bankshares, Inc [Member] | Cost Recovery Method [Member]
Financing Receivable, Recorded Investment [Line Items]
Fair value of acquired loans	700,000	800,000
ESB Financial Corporation [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans acquired with deteriorated credit quality	3,500,000	3,700,000
Loans acquired accretable	2,900,000
Allowance for loan losses	2,000,000	2,000,000
ESB Financial Corporation [Member] | Cost Recovery Method [Member]
Financing Receivable, Recorded Investment [Line Items]
Fair value of acquired loans	3,500,000	3,500,000
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans acquired with deteriorated credit quality	703,000	714,000
Allowance for loan losses	3,252,000	3,206,000	$ 4,110,000	$ 4,106,000
Other real estate owned	900,000	1,500,000
Foreclosure proceedings in process on residential real estate loans	$ 4,300,000	$ 3,500,000

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Loans and the Allowance for Credit Losses - Schedule of Recorded Investment in Loans by Category (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	$ 6,322,538	$ 6,341,441
Loans held for sale	12,962	20,320
Total loans	6,335,500	6,361,761
Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	440,896	392,597
Commercial Real Estate - Improved Property [Member]
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	2,574,330	2,601,851
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	1,118,333	1,125,327
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	3,015,226	2,994,448
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	1,345,993	1,353,301
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	319,561	339,169
Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	$ 523,425	$ 529,196

XML

Loans and the Allowance for Credit Losses - Summary of Changes in Allowance for Credit Losses (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance	$ 45,284	$ 43,674
Allowance for loan commitments, beginning balance	574	571
Total beginning allowance for credit losses	45,858	44,245
Provision for loan losses	2,113	2,734
Provision for loan commitments	55	(23)
Total provision for credit losses	2,168	2,711
Charge-offs	(2,643)	(3,619)
Recoveries	1,580	1,272
Net charge-offs	(1,063)	(2,347)
Allowance for loan losses, ending balance	46,334	44,061
Allowance for loan commitments, ending balance	629	548
Total ending allowance for credit losses	46,963	44,609
Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance	3,117	4,348
Allowance for loan commitments, beginning balance	119	151
Total beginning allowance for credit losses	3,236	4,499
Provision for loan losses	1,090	(425)
Provision for loan commitments	57	(8)
Total provision for credit losses	1,147	(433)
Recoveries	117	52
Net charge-offs	117	52
Allowance for loan losses, ending balance	4,324	3,975
Allowance for loan commitments, ending balance	176	143
Total ending allowance for credit losses	4,500	4,118
Commercial Real Estate - Improved Property [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance	21,166	18,628
Allowance for loan commitments, beginning balance	26	17
Total beginning allowance for credit losses	21,192	18,645
Provision for loan losses	(895)	983
Provision for loan commitments	(5)
Total provision for credit losses	(900)	983
Charge-offs	(279)	(602)
Recoveries	287	251
Net charge-offs	8	(351)
Allowance for loan losses, ending balance	20,279	19,260
Allowance for loan commitments, ending balance	21	17
Total ending allowance for credit losses	20,300	19,277
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance	9,414	8,412
Allowance for loan commitments, beginning balance	173	188
Total beginning allowance for credit losses	9,587	8,600
Provision for loan losses	919	832
Provision for loan commitments	3	(31)
Total provision for credit losses	922	801
Charge-offs	(109)	(880)
Recoveries	270	376
Net charge-offs	161	(504)
Allowance for loan losses, ending balance	10,494	8,740
Allowance for loan commitments, ending balance	176	157
Total ending allowance for credit losses	10,670	8,897
Deposit Overdraft [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance	821	760
Total beginning allowance for credit losses	821	760
Provision for loan losses	(48)	66
Total provision for credit losses	(48)	66
Charge-offs	(267)	(338)
Recoveries	109	98
Net charge-offs	(158)	(240)
Allowance for loan losses, ending balance	615	586
Total ending allowance for credit losses	615	586
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance	3,206	4,106
Allowance for loan commitments, beginning balance	7	9
Total beginning allowance for credit losses	3,213	4,115
Provision for loan losses	202	330
Provision for loan commitments		1
Total provision for credit losses	202	331
Charge-offs	(287)	(404)
Recoveries	131	78
Net charge-offs	(156)	(326)
Allowance for loan losses, ending balance	3,252	4,110
Allowance for loan commitments, ending balance	7	10
Total ending allowance for credit losses	3,259	4,120
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance	3,063	3,998
Allowance for loan commitments, beginning balance	37	44
Total beginning allowance for credit losses	3,100	4,042
Provision for loan losses	583	583
Provision for loan commitments	4	(2)
Total provision for credit losses	587	581
Charge-offs	(1,125)	(1,287)
Recoveries	546	369
Net charge-offs	(579)	(918)
Allowance for loan losses, ending balance	3,067	3,663
Allowance for loan commitments, ending balance	41	42
Total ending allowance for credit losses	3,108	3,705
Home Equity [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance	4,497	3,422
Allowance for loan commitments, beginning balance	212	162
Total beginning allowance for credit losses	4,709	3,584
Provision for loan losses	262	365
Provision for loan commitments	(4)	17
Total provision for credit losses	258	382
Charge-offs	(576)	(108)
Recoveries	120	48
Net charge-offs	(456)	(60)
Allowance for loan losses, ending balance	4,303	3,727
Allowance for loan commitments, ending balance	208	179
Total ending allowance for credit losses	$ 4,511	$ 3,906

XML

Loans and the Allowance for Credit Losses - Allowance for Credit Losses and Recorded Investments in Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans individually evaluated for impairment	$ 387	$ 388
Allowance for loans collectively evaluated for impairment	45,947	44,896
Allowance for loan commitments	629	574	$ 548	$ 571
Total allowance for credit losses	46,963	45,858	44,609	44,245
Individually evaluated for impairment	2,104	3,344
Collectively evaluated for impairment	6,312,730	6,330,023
Acquired with deteriorated credit quality	7,704	8,074
Total loans	6,322,538	6,341,441
Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans collectively evaluated for impairment	4,324	3,117
Allowance for loan commitments	176	119	143	151
Total allowance for credit losses	4,500	3,236	4,118	4,499
Collectively evaluated for impairment	439,480	391,140
Acquired with deteriorated credit quality	1,416	1,457
Total loans	440,896	392,597
Commercial Real Estate - Improved Property [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans individually evaluated for impairment	387	388
Allowance for loans collectively evaluated for impairment	19,892	20,778
Allowance for loan commitments	21	26	17	17
Total allowance for credit losses	20,300	21,192	19,277	18,645
Individually evaluated for impairment	2,104	3,344
Collectively evaluated for impairment	2,567,367	2,593,393
Acquired with deteriorated credit quality	4,859	5,114
Total loans	2,574,330	2,601,851
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans collectively evaluated for impairment	10,494	9,414
Allowance for loan commitments	176	173	157	188
Total allowance for credit losses	10,670	9,587	8,897	8,600
Collectively evaluated for impairment	1,117,607	1,124,544
Acquired with deteriorated credit quality	726	783
Total loans	1,118,333	1,125,327
Deposit Overdraft [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans collectively evaluated for impairment	615	821
Total allowance for credit losses	615	821	586	760
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans collectively evaluated for impairment	3,252	3,206
Allowance for loan commitments	7	7	10	9
Total allowance for credit losses	3,259	3,213	4,120	4,115
Collectively evaluated for impairment	1,345,290	1,352,587
Acquired with deteriorated credit quality	703	714
Total loans	1,345,993	1,353,301
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans collectively evaluated for impairment	3,067	3,063
Allowance for loan commitments	41	37	42	44
Total allowance for credit losses	3,108	3,100	3,705	4,042
Collectively evaluated for impairment	319,561	339,163
Acquired with deteriorated credit quality		6
Total loans	319,561	339,169
Home Equity [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans collectively evaluated for impairment	4,303	4,497
Allowance for loan commitments	208	212	179	162
Total allowance for credit losses	4,511	4,709	$ 3,906	$ 3,584
Collectively evaluated for impairment	523,425	529,196
Total loans	$ 523,425	$ 529,196

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Loans and the Allowance for Credit Losses - Allowance for Credit Losses and Recorded Investments in Loans (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Receivables [Abstract]
Troubled debt restructuring threshold	$ 1	$ 1

XML

Loans and the Allowance for Credit Losses - Summary of Commercial Loans by Risk Grade (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Summary of commercial loans by risk grade
Commercial loans	$ 6,276,204	$ 6,296,157
Commercial Portfolio Segment [Member]
Summary of commercial loans by risk grade
Commercial loans	4,133,559	4,119,775
Commercial Portfolio Segment [Member] | Pass [Member]
Summary of commercial loans by risk grade
Commercial loans	4,065,208	4,045,825
Commercial Portfolio Segment [Member] | Criticized [Member]
Summary of commercial loans by risk grade
Commercial loans	33,785	36,092
Commercial Portfolio Segment [Member] | Classified - Substandard [Member]
Summary of commercial loans by risk grade
Commercial loans	34,566	37,858
Commercial Portfolio Segment [Member] | Commercial Real Estate - Land and Construction [Member]
Summary of commercial loans by risk grade
Commercial loans	440,896	392,597
Commercial Portfolio Segment [Member] | Commercial Real Estate - Land and Construction [Member] | Pass [Member]
Summary of commercial loans by risk grade
Commercial loans	434,665	386,753
Commercial Portfolio Segment [Member] | Commercial Real Estate - Land and Construction [Member] | Criticized [Member]
Summary of commercial loans by risk grade
Commercial loans	3,384	2,984
Commercial Portfolio Segment [Member] | Commercial Real Estate - Land and Construction [Member] | Classified - Substandard [Member]
Summary of commercial loans by risk grade
Commercial loans	2,847	2,860
Commercial Portfolio Segment [Member] | Commercial Real Estate - Improved Property [Member]
Summary of commercial loans by risk grade
Commercial loans	2,574,330	2,601,851
Commercial Portfolio Segment [Member] | Commercial Real Estate - Improved Property [Member] | Pass [Member]
Summary of commercial loans by risk grade
Commercial loans	2,526,334	2,548,805
Commercial Portfolio Segment [Member] | Commercial Real Estate - Improved Property [Member] | Criticized [Member]
Summary of commercial loans by risk grade
Commercial loans	24,807	25,673
Commercial Portfolio Segment [Member] | Commercial Real Estate - Improved Property [Member] | Classified - Substandard [Member]
Summary of commercial loans by risk grade
Commercial loans	23,189	27,373
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Summary of commercial loans by risk grade
Commercial loans	1,118,333	1,125,327
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Pass [Member]
Summary of commercial loans by risk grade
Commercial loans	1,104,209	1,110,267
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Criticized [Member]
Summary of commercial loans by risk grade
Commercial loans	5,594	7,435
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Classified - Substandard [Member]
Summary of commercial loans by risk grade
Commercial loans	$ 8,530	$ 7,625

XML

Loans and the Allowance for Credit Losses - Summary of Changes in Accretable Yield for Loans Acquired with Deteriorated Credit Quality (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period [Abstract]
Balance at beginning of period	$ 1,724	$ 1,717
Acquisitions	0	0
Reduction due to change in projected cash flows	(86)	(200)
Reclass from non-accretable difference	2,841	174
Transfers out	0	0
Accretion	(268)	(151)
Balance at end of period	$ 4,211	$ 1,540

XML

Loans and the Allowance for Credit Losses - Summary of Age Analysis of Loan Categories (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Current	$ 6,281,734	$ 6,299,397
Total Past Due	40,804	42,044
Total loans	6,322,538	6,341,441
90 Days or More Past Due and Accruing	1,579	2,726
Loans held for sale, current	12,962	20,320
Loans held for sale	12,962	20,320
Total loans, current	6,294,696	6,319,717
Total loans	6,335,500	6,361,761
Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	517,172	522,584
Total Past Due	6,253	6,612
Total loans	523,425	529,196
90 Days or More Past Due and Accruing	251	742
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	2,999,417	2,981,893
Total Past Due	15,809	12,555
Total loans	3,015,226	2,994,448
90 Days or More Past Due and Accruing	536	243
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	1,333,175	1,338,240
Total Past Due	12,818	15,061
Total loans	1,345,993	1,353,301
90 Days or More Past Due and Accruing	561	1,113
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	316,517	334,723
Total Past Due	3,044	4,446
Total loans	319,561	339,169
90 Days or More Past Due and Accruing	210	608
Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	439,926	392,189
Total Past Due	970	408
Total loans	440,896	392,597
90 Days or More Past Due and Accruing	172
Commercial Real Estate - Improved Property [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	2,559,491	2,589,704
Total Past Due	14,839	12,147
Total loans	2,574,330	2,601,851
90 Days or More Past Due and Accruing	364	243
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	1,115,453	1,121,957
Total Past Due	2,880	3,370
Total loans	1,118,333	1,125,327
90 Days or More Past Due and Accruing	21	20
Non-Accrual Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	8,120	9,195
Total Past Due	24,266	27,630
Total loans	32,386	36,825
TDRs Accruing Interest [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	6,435	6,055
Total Past Due	423	516
Total loans	6,858	6,571
Total Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Current	14,555	15,250
Total Past Due	24,689	28,146
Total loans	39,244	43,396
30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	13,562	10,034
30-59 Days Past Due [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	2,654	2,135
30-59 Days Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	4,431	374
30-59 Days Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	3,860	4,487
30-59 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	1,950	2,466
30-59 Days Past Due [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	4,431	374
30-59 Days Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	667	572
30-59 Days Past Due [Member] | Non-Accrual Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	1,310	1,782
30-59 Days Past Due [Member] | TDRs Accruing Interest [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	230	348
30-59 Days Past Due [Member] | Total Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	1,540	2,130
60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	3,461	5,469
60-89 Days Past Due [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	682	683
60-89 Days Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	528	1,372
60-89 Days Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	1,618	2,376
60-89 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	432	842
60-89 Days Past Due [Member] | Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due		172
60-89 Days Past Due [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	528	1,200
60-89 Days Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	201	196
60-89 Days Past Due [Member] | Non-Accrual Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	754	2,033
60-89 Days Past Due [Member] | TDRs Accruing Interest [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	193	168
60-89 Days Past Due [Member] | Total Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	947	2,201
90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	23,781	26,541
90 Days or More Past Due [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	2,917	3,794
90 Days or More Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	10,850	10,809
90 Days or More Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	7,340	8,198
90 Days or More Past Due [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	662	1,138
90 Days or More Past Due [Member] | Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	970	236
90 Days or More Past Due [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	9,880	10,573
90 Days or More Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	2,012	2,602
90 Days or More Past Due [Member] | Non-Accrual Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	22,202	23,815
90 Days or More Past Due [Member] | Total Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Past Due	$ 22,202	$ 23,815

XML

Loans and the Allowance for Credit Losses - Summary of Age Analysis of Loan Categories (Parenthetical) (Detail)	3 Months Ended
	Mar. 31, 2018
Receivables [Abstract]
Past due loans excluded TDRs past due and accruing	90 days

XML

Loans and the Allowance for Credit Losses - Summary of Impaired Loans (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no specific allowance recorded	$ 44,762	$ 50,124
Total impaired loans, Unpaid principal balance	46,866	52,229
Recorded Investment, With no specific allowance recorded	37,140	41,291
Total impaired loans, Recorded investment	39,244	43,396
Unpaid Principal Balance, With a specific allowance recorded	2,104	2,105
Recorded Investment, With a specific allowance recorded	2,104	2,105
Related Allowance, With a specific allowance recorded	387	388
Average recorded investment, with no related specific allowance	39,217	37,415
Interest income recognized, With no related specific allowance	421	424
Average recorded investment, With a specific allowance recorded	2,105	5,562
Interest income recognized, With a specific allowance recorded	0	0
Total impaired loans, Average recorded investment	41,322	42,977
Total impaired loans, Interest income recognized	421	424
Residential Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no specific allowance recorded	19,601	20,821
Recorded Investment, With no specific allowance recorded	17,751	18,982
Average recorded investment, with no related specific allowance	18,367	18,448
Interest income recognized, With no related specific allowance	66	69
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no specific allowance recorded	918	1,084
Recorded Investment, With no specific allowance recorded	803	952
Average recorded investment, with no related specific allowance	878	761
Interest income recognized, With no related specific allowance	3	2
Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no specific allowance recorded	5,771	5,833
Recorded Investment, With no specific allowance recorded	4,971	5,169
Average recorded investment, with no related specific allowance	5,070	4,186
Interest income recognized, With no related specific allowance	5	5
Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no specific allowance recorded	873	412
Recorded Investment, With no specific allowance recorded	800	239
Average recorded investment, with no related specific allowance	520	588
Interest income recognized, With a specific allowance recorded	0	0
Commercial Real Estate - Improved Property [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no specific allowance recorded	14,554	18,229
Recorded Investment, With no specific allowance recorded	10,319	12,863
Unpaid Principal Balance, With a specific allowance recorded	2,104	2,105
Recorded Investment, With a specific allowance recorded	2,104	2,105
Related Allowance, With a specific allowance recorded	387	388
Average recorded investment, with no related specific allowance	11,591	9,620
Interest income recognized, With no related specific allowance	345	346
Average recorded investment, With a specific allowance recorded	2,105	4,927
Interest income recognized, With a specific allowance recorded	0	0
Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no specific allowance recorded	3,045	3,745
Recorded Investment, With no specific allowance recorded	2,496	3,086
Average recorded investment, with no related specific allowance	2,791	3,812
Interest income recognized, With no related specific allowance	2	2
Average recorded investment, With a specific allowance recorded		635
Interest income recognized, With a specific allowance recorded	$ 0	$ 0

XML

Loans and the Allowance for Credit Losses - Recorded Investment in Non-Accrual Loans and TDRs (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Financing Receivable, Impaired [Line Items]
Non-accrual loans	$ 32,386	$ 36,825
TDRs	9,255	9,436
Accruing TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	6,858	6,571
Non-Accrual TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	2,397	2,865
Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	800	239
TDRs	2	3
Commercial Real Estate - Land and Construction [Member] | Non-Accrual TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	2	3
Commercial Real Estate - Improved Property [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	10,821	13,318
TDRs	2,092	2,078
Commercial Real Estate - Improved Property [Member] | Accruing TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	1,602	1,650
Commercial Real Estate - Improved Property [Member] | Non-Accrual TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	490	428
Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	2,373	2,958
TDRs	217	225
Commercial and Industrial [Member] | Accruing TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	123	128
Commercial and Industrial [Member] | Non-Accrual TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	94	97
Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	4,540	4,762
TDRs	651	744
Home Equity [Member] | Accruing TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	431	407
Home Equity [Member] | Non-Accrual TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	220	337
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	11,621	13,557
TDRs	2,094	2,081
Commercial Real Estate [Member] | Accruing TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	1,602	1,650
Commercial Real Estate [Member] | Non-Accrual TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	492	431
Residential Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	13,149	14,661
TDRs	6,127	6,201
Residential Real Estate [Member] | Accruing TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	4,602	4,321
Residential Real Estate [Member] | Non-Accrual TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	1,525	1,880
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	703	887
TDRs	166	185
Consumer [Member] | Accruing TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	100	65
Consumer [Member] | Non-Accrual TDRs [Member]
Financing Receivable, Impaired [Line Items]
TDRs	$ 66	$ 120

XML

Loans and the Allowance for Credit Losses - Recorded Investment in Non-Accrual Loans and TDRs (Parenthetical) (Detail)	Mar. 31, 2018 USD ($) Borrowers	Dec. 31, 2017 USD ($) Borrowers
Receivables [Abstract]
Number of borrowers with loans greater than one million | Borrowers	2	3
Borrowers with large amount of loans outstanding, minimum amount of loans per borrower	$ 1,000,000	$ 1,000,000
Borrowers with large amount of loans outstanding, net	$ 5,600,000	$ 6,800,000

XML

Loans and the Allowance for Credit Losses - Loans Identified as TDRs (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($) Contract	Mar. 31, 2017 USD ($) Contract
Financing Receivable, Modifications [Line Items]
Number of Modifications | Contract	7	6
Pre-Modification Outstanding Recorded Investment	$ 207	$ 264
Post-Modification Outstanding Recorded Investment	$ 198	$ 195
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of Modifications | Contract		2
Pre-Modification Outstanding Recorded Investment		$ 126
Post-Modification Outstanding Recorded Investment		$ 122
Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Modifications | Contract	5	1
Pre-Modification Outstanding Recorded Investment	$ 203	$ 10
Post-Modification Outstanding Recorded Investment	$ 195	$ 9
Consumer [Member]
Financing Receivable, Modifications [Line Items]
Number of Modifications | Contract	2	2
Pre-Modification Outstanding Recorded Investment	$ 4	$ 84
Post-Modification Outstanding Recorded Investment	$ 3	$ 21
Home Equity [Member]
Financing Receivable, Modifications [Line Items]
Number of Modifications | Contract		1
Pre-Modification Outstanding Recorded Investment		$ 44
Post-Modification Outstanding Recorded Investment		$ 43

XML

Loans and the Allowance for Credit Losses - TDRs Defaulted Later Restructured (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($) Defaults	Mar. 31, 2017 USD ($) Defaults
Financing Receivable, Modifications [Line Items]
Number of Defaults | Defaults	2	1
Recorded Investment | $	$ 129	$ 9
Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults | Defaults	1
Recorded Investment | $	$ 122
Consumer [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults | Defaults		1
Recorded Investment | $		$ 9
Home Equity [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults | Defaults	1
Recorded Investment | $	$ 7

XML

Loans and the Allowance for Credit Losses - Summary of Other Real Estate Owned and Repossessed Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Receivables [Abstract]
Other real estate owned	$ 3,991	$ 5,195
Repossessed assets	76	102
Total other real estate owned and repossessed assets	$ 4,067	$ 5,297

XML

Derivatives and Hedging Activities - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2018 USD ($) Derivative	Mar. 31, 2017 USD ($)	Dec. 31, 2017 USD ($) Derivative
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Aggregate notional amount	$ 309,200,000		$ 298,200,000
Net gain (loss) on change in fair value	336,000	$ 195,000
Collateral posted with market value on liability positions with credit risk-related contingent features	$ 2,900,000
Interest Rate Swaps [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of interest rate swaps | Derivative	43		39
Net gain (loss) on change in fair value	$ 200,000	(200,000)
Income (loss) on derivative instrument not designated hedges	$ 400,000	$ 1,000,000

XML

Derivatives and Hedging Activities - Summary of Fair Values of Derivative Instruments on Balance Sheets (Detail) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Derivatives, Fair Value [Line Items]
Notional or Contractual Amount	$ 309,200,000	$ 298,200,000
Asset Derivatives	9,404,000	7,400,000
Liability Derivatives	9,097,000	7,374,000
Interest Rate Swaps [Member] | Loan Swaps [Member]
Derivatives, Fair Value [Line Items]
Notional or Contractual Amount	309,242,000	298,223,000
Asset Derivatives	9,257,000	7,351,000
Liability Derivatives	9,083,000	7,345,000
Interest Rate Loan Commitments [Member] | Other Contract [Member]
Derivatives, Fair Value [Line Items]
Notional or Contractual Amount	24,730,000	20,319,000
Asset Derivatives	147,000	49,000
Best Efforts Forward Delivery Commitments [Member] | Other Contract [Member]
Derivatives, Fair Value [Line Items]
Notional or Contractual Amount	3,941,000	2,905,000
Liability Derivatives	11,000	6,000
Forward TBA Contracts [Member] | Other Contract [Member]
Derivatives, Fair Value [Line Items]
Notional or Contractual Amount	36,500,000	31,750,000
Liability Derivatives	$ 3,000	$ 23,000

XML

Derivatives and Hedging Activities - Summary of Effect of Derivative Instruments on Income Statement (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Derivatives, Fair Value [Line Items]
Total gain (loss) on derivative financial instruments	$ 336	$ 195
Interest Rate Swaps [Member] | Other Income [Member]
Derivatives, Fair Value [Line Items]
Total gain (loss) on derivative financial instruments	(167)	$ 195
Interest Rate Loan Commitments [Member] | Mortgage Banking Income [Member]
Derivatives, Fair Value [Line Items]
Total gain (loss) on derivative financial instruments	98
Best Efforts Forward Delivery Commitments [Member] | Mortgage Banking Income [Member]
Derivatives, Fair Value [Line Items]
Total gain (loss) on derivative financial instruments	(5)
Forward TBA Contracts [Member] | Mortgage Banking Income [Member]
Derivatives, Fair Value [Line Items]
Total gain (loss) on derivative financial instruments	$ 410

XML

Pension Plan - Components of Net Periodic Pension Cost (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost - benefits earned during year	$ 699	$ 636
Interest cost on projected benefit obligation	1,114	1,084
Expected return on plan assets	(2,204)	(1,886)
Amortization of prior service cost	6	6
Amortization of net loss	753	794
Net periodic pension cost	$ 368	$ 634

XML

Pension Plan - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum required pension plan contribution	$ 5,100
Expected voluntary contribution for the year 2018	5,000
Available credit balance	56,900
Net periodic pension income	368	$ 634
Expected return on plan assets	2,204	1,886
Interest cost on projected benefit obligation	1,114	$ 1,084
Pentegra Defined Benefit Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Spinning off of asset cost	2,800
Net periodic pension income	62
Expected return on plan assets	200
Recognized net actuarial gain	3
Interest cost on projected benefit obligation	$ 100

XML

Fair Value Measurement - Schedule of Fair Value of Assets and Liabilities Measured on Recurring and Nonrecurring Basis (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	$ 13,986	$ 13,457
Total debt securities - available-for-sale	1,728,377	1,261,865
Loans held for sale	12,962	20,320
Other real estate owned and repossessed assets	4,067	5,297
Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	13,986	13,457
Total debt securities - available-for-sale	1,728,377	1,261,865
Loans held for sale	12,962	20,320
Other assets - interest rate derivatives agreements	9,257	7,351
Total assets recurring fair value measurements	1,764,582	1,302,993
Nonrecurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other liabilities - interest rate derivatives agreements	9,083	7,345
Total liabilities recurring fair value measurements	9,083	7,345
Impaired loans	1,717	1,717
Other real estate owned and repossessed assets	4,067	5,297
Total assets recurring fair value measurements	5,784	7,014
US Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities - available-for-sale	9,894
US Treasury Securities [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities - available-for-sale	9,894
U.S. Government Sponsored Entities and Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities - available-for-sale	96,458	71,843
U.S. Government Sponsored Entities and Agencies [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities - available-for-sale	96,458	71,843
Residential Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities - available-for-sale	1,344,410	934,922
Residential Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and Agencies [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities - available-for-sale	1,344,410	934,922
Commercial Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities - available-for-sale	140,926	114,867
Commercial Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and Agencies [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities - available-for-sale	140,926	114,867
Obligations of State and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities - available-for-sale	101,431	104,830
Obligations of State and Political Subdivisions [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities - available-for-sale	101,431	104,830
Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities - available-for-sale	35,258	35,403
Corporate Debt Securities [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities - available-for-sale	35,258	35,403
Investments Measured at Net Asset Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	2,418	2,066
Investments Measured at Net Asset Value [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	2,418	2,066
Total assets recurring fair value measurements	2,418	2,066
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	11,568	11,391
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	11,568	11,391
Total assets recurring fair value measurements	11,568	11,391
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other liabilities - interest rate derivatives agreements	9,083	7,345
Total debt securities - available-for-sale	1,728,377	1,261,865
Loans held for sale	12,962	20,320
Other assets - interest rate derivatives agreements	9,257	7,351
Significant Other Observable Inputs (Level 2) [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities - available-for-sale	1,728,377	1,261,865
Loans held for sale	12,962	20,320
Other assets - interest rate derivatives agreements	9,257	7,351
Total assets recurring fair value measurements	1,750,596	1,289,536
Significant Other Observable Inputs (Level 2) [Member] | Nonrecurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other liabilities - interest rate derivatives agreements	9,083	7,345
Total liabilities recurring fair value measurements	9,083	7,345
Significant Other Observable Inputs (Level 2) [Member] | US Treasury Securities [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities - available-for-sale	9,894
Significant Other Observable Inputs (Level 2) [Member] | U.S. Government Sponsored Entities and Agencies [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities - available-for-sale	96,458	71,843
Significant Other Observable Inputs (Level 2) [Member] | Residential Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and Agencies [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities - available-for-sale	1,344,410	934,922
Significant Other Observable Inputs (Level 2) [Member] | Commercial Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and Agencies [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities - available-for-sale	140,926	114,867
Significant Other Observable Inputs (Level 2) [Member] | Obligations of State and Political Subdivisions [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities - available-for-sale	101,431	104,830
Significant Other Observable Inputs (Level 2) [Member] | Corporate Debt Securities [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities - available-for-sale	35,258	35,403
Significant Unobservable Inputs (Level 3) [Member] | Nonrecurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	1,717	1,717
Other real estate owned and repossessed assets	4,067	5,297
Total assets recurring fair value measurements	$ 5,784	$ 7,014

XML

Fair Value Measurement - Additional Information (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Fair value transfer amount	$ 0	$ 0

XML

Fair Value Measurement - Schedule of Assets Measured at Fair Value on Nonrecurring Basis (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Other real estate owned and repossessed assets	$ 4,067	$ 5,297
Impaired loans, Appraisal adjustments	(4.80%)	(4.80%)
Impaired loans, Liquidation expenses	(7.60%)	(7.60%)
Nonrecurring Fair Value Measurements [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans	$ 1,717	$ 1,717
Other real estate owned and repossessed assets	4,067	5,297
Significant Unobservable Inputs (Level 3) [Member] | Nonrecurring Fair Value Measurements [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans	1,717	1,717
Other real estate owned and repossessed assets	$ 4,067	$ 5,297
Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans, Appraisal adjustments	(4.80%)	(4.80%)
Impaired loans, Liquidation expenses	(7.60%)	(7.60%)

XML

Fair Value Measurement - Estimates Fair Value of Financial Instruments (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Financial Assets
Cash and due from banks	$ 100,845	$ 117,572	$ 115,084	$ 128,170
Equity securities	13,986	13,457
Debt securities available-for-sale	1,728,377	1,261,865
Debt securities held-to-maturity	1,006,042	1,009,500
Net loans	6,276,204	6,296,157
Loans held for sale	12,962	20,320
Accrued interest receivable	31,963	29,728
Financial Liabilities
Deposits	7,226,326	7,043,588
Federal Home Loan Bank borrowings	1,166,939	948,203
Other borrowings	207,653	184,805
Subordinated debt and junior subordinated debt	164,379	164,327
Accrued interest payable	4,033	3,178
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Financial Assets
Cash and due from banks	100,845	117,572
Equity securities	11,568	11,391
Accrued interest receivable	31,963	29,728
Financial Liabilities
Deposits	6,018,657	5,766,531
Other borrowings	205,651	182,785
Accrued interest payable	4,033	3,178
Significant Other Observable Inputs (Level 2) [Member]
Financial Assets
Debt securities available-for-sale	1,728,377	1,261,865
Debt securities held-to-maturity	1,004,912	1,023,191
Loans held for sale	12,962	20,320
Other assets - interest rate derivatives	9,257	7,351
Financial Liabilities
Deposits	1,211,678	1,287,005
Federal Home Loan Bank borrowings	1,161,442	944,706
Other borrowings	1,976	2,029
Subordinated debt and junior subordinated debt	149,887	146,484
Other liabilities - interest rate derivatives	9,083	7,345
Significant Unobservable Inputs (Level 3) [Member]
Financial Assets
Debt securities held-to-maturity	590	593
Net loans	6,158,399	6,212,823
Carrying Amount [Member]
Financial Assets
Cash and due from banks	100,845	117,572
Equity securities	13,986	13,457
Debt securities available-for-sale	1,728,377	1,261,865
Debt securities held-to-maturity	1,006,042	1,009,500
Net loans	6,276,204	6,296,157
Loans held for sale	12,962	20,320
Other assets - interest rate derivatives	9,257	7,351
Accrued interest receivable	31,963	29,728
Financial Liabilities
Deposits	7,226,326	7,043,588
Federal Home Loan Bank borrowings	1,166,939	948,203
Other borrowings	207,653	184,805
Subordinated debt and junior subordinated debt	164,379	164,327
Other liabilities - interest rate derivatives	9,083	7,345
Accrued interest payable	4,033	3,178
Fair Value Estimate [Member]
Financial Assets
Cash and due from banks	100,845	117,572
Equity securities	13,986	13,457
Debt securities available-for-sale	1,728,377	1,261,865
Debt securities held-to-maturity	1,005,502	1,023,784
Net loans	6,158,399	6,212,823
Loans held for sale	12,962	20,320
Other assets - interest rate derivatives	9,257	7,351
Accrued interest receivable	31,963	29,728
Financial Liabilities
Deposits	7,230,335	7,053,536
Federal Home Loan Bank borrowings	1,161,442	944,706
Other borrowings	207,627	184,814
Subordinated debt and junior subordinated debt	149,887	146,484
Other liabilities - interest rate derivatives	9,083	7,345
Accrued interest payable	4,033	3,178
Investments Measured at Net Asset Value [Member]
Financial Assets
Equity securities	$ 2,418	$ 2,066

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Revenue Recognition - Summary of Revenue Recognition (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Schedule Of Revenue Recognition [Line Items]
Total trust fees	$ 6,503	$ 6,143
Service charges on deposits	4,822	4,853
Total net securities brokerage revenue	1,670	1,762
Electronic banking fees	4,829	4,528
Mortgage banking income	1,004	1,440
Gain/loss on sale of OREO/other assets	$ 262	$ (76)
Trust Account Fees [Member]
Schedule Of Revenue Recognition [Line Items]
Point of revenue recognition	Over time
Total trust fees	$ 4,292
WesMark Fees [Member]
Schedule Of Revenue Recognition [Line Items]
Point of revenue recognition	Over time
Total trust fees	$ 2,211
Commercial Banking Fees [Member]
Schedule Of Revenue Recognition [Line Items]
Point of revenue recognition	Over time
Service charges on deposits	$ 407
Personal Service Charges [Member]
Schedule Of Revenue Recognition [Line Items]
Point of revenue recognition	At a point in time & Over time
Service charges on deposits	$ 4,415
Annuity Commissions [Member]
Schedule Of Revenue Recognition [Line Items]
Point of revenue recognition	At a point in time
Total net securities brokerage revenue	$ 1,200
Equity and Debt Security Trades [Member]
Schedule Of Revenue Recognition [Line Items]
Point of revenue recognition	At a point in time
Total net securities brokerage revenue	$ 102
Managed Money [Member]
Schedule Of Revenue Recognition [Line Items]
Point of revenue recognition	Over time
Total net securities brokerage revenue	$ 141
Trail Commissions [Member]
Schedule Of Revenue Recognition [Line Items]
Point of revenue recognition	Over time
Total net securities brokerage revenue	$ 227
Electronic Banking Fees [Member]
Schedule Of Revenue Recognition [Line Items]
Point of revenue recognition	At a point in time
Mortgage [Member]
Schedule Of Revenue Recognition [Line Items]
Point of revenue recognition	At a point in time
OREO/other assets [Member]
Schedule Of Revenue Recognition [Line Items]
Point of revenue recognition	At a point in time

XML

Comprehensive Income/(Loss) - Components of Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ 1,395,321	$ 1,341,408
Amounts reclassified from accumulated other comprehensive income	387	605
Total other comprehensive income	(14,518)	2,285
Ending Balance	1,403,026	1,359,153
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(18,626)	(17,758)
Amounts reclassified from accumulated other comprehensive income	437	655
Total other comprehensive income	437	655
Ending Balance	(18,189)	(17,103)
Accumulated Unrealized Gains (Losses) on Debt Securities Available for Sale [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(13,250)	(9,890)
Other comprehensive income before reclassifications	(14,905)	1,680
Total other comprehensive income	(14,905)	1,680
Adoption of Accounting Standard ASU 2016-01	(1,063)
Ending Balance	(29,218)	(8,210)
Accumulated Unrealized Gains on Debt Securities Transferred from Available For Sale to Held to Maturity [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	381	522
Amounts reclassified from accumulated other comprehensive income	(50)	(50)
Total other comprehensive income	(50)	(50)
Ending Balance	331	472
Accumulated Other Comprehensive (Loss) Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(31,495)	(27,126)
Other comprehensive income before reclassifications	(14,905)	1,680
Amounts reclassified from accumulated other comprehensive income	387	605
Total other comprehensive income	(14,518)	2,285
Adoption of Accounting Standard ASU 2016-01	(1,063)
Ending Balance	$ (47,076)	$ (24,841)

XML

Comprehensive Income/(Loss) - Components of Accumulated Other Comprehensive Income (Parenthetical) (Detail)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Percentage of Federal and State income tax rate	23.00%	37.00%

XML

Comprehensive Income/(Loss) - Schedule of Amounts Reclassified from Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net securities gains (Non-interest income)	$ 39	$ (12)
Interest and dividends on securities (Interest and dividend income)	(16,377)	(14,487)
Employee benefits (Non-interest expense)	6,912	8,210
Provision for income taxes	7,004	10,622
Net effect on accumulated other comprehensive income for the period	387	605
Accumulated Unrealized Gains on Debt Securities Transferred from Available For Sale to Held to Maturity [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net effect on accumulated other comprehensive income for the period	(50)	(50)
Accumulated Defined Benefit Plans Adjustment [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net effect on accumulated other comprehensive income for the period	437	655
Amounts Reclassified From Accumulated Other Comprehensive Income/(Loss) [Member] | Accumulated Unrealized Gains (Losses) on Debt Securities Available for Sale [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net securities gains (Non-interest income)	0	0
Amounts Reclassified From Accumulated Other Comprehensive Income/(Loss) [Member] | Accumulated Unrealized Gains on Debt Securities Transferred from Available For Sale to Held to Maturity [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest and dividends on securities (Interest and dividend income)	(66)	(72)
Provision for income taxes	16	22
Amounts Reclassified From Accumulated Other Comprehensive Income/(Loss) [Member] | Accumulated Defined Benefit Plans Adjustment [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Employee benefits (Non-interest expense)	756	801
Provision for income taxes	$ (319)	$ (146)

XML

Commitments and Contingent Liabilities - Additional Information (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Allowance for credit losses associated with loan commitments	$ 629	$ 574	$ 548	$ 571
Liability associated with letters of credit	$ 200	$ 200

XML

Commitments and Contingent Liabilities - Commitments to Extend Credit, Guarantees and Various Letters of Credit Outstanding (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Lines of credit	$ 1,464,970	$ 1,452,697
Loans approved but not closed	358,367	245,644
Overdraft limits	124,752	126,671
Letters of credit	31,947	31,951
Contingent obligations and other guarantees	$ 6,796	$ 6,700

XML

Business Segments - Additional Information (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2018 USD ($) Segment	Mar. 31, 2017 USD ($)
Segment Reporting Information [Line Items]
Operating segments | Segment	2
Trust and Investment Services [Member]
Segment Reporting Information [Line Items]
Market value of assets managed or held in custody by trust and investment services segment	$ 4,000.0	$ 3,800.0
Total non-fiduciary assets of the trust and investment services segment	$ 1.8	$ 3.8

XML

Business Segments - Financial Information by Business Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting Information [Line Items]
Interest and dividend income	$ 86,417	$ 79,924
Interest expense	13,125	9,205
Net interest income	73,292	70,719
Provision for credit losses	2,168	2,711
Net interest income after provision for credit losses	71,124	68,008
Non-interest income	23,980	22,884
Non-interest expense	54,571	54,384
Income before provision for income taxes	40,533	36,508
Provision for income taxes	7,004	10,622
Net income	33,529	25,886
Community Banking [Member]
Segment Reporting Information [Line Items]
Interest and dividend income	86,417	79,924
Interest expense	13,125	9,205
Net interest income	73,292	70,719
Provision for credit losses	2,168	2,711
Net interest income after provision for credit losses	71,124	68,008
Non-interest income	17,477	16,741
Non-interest expense	50,894	50,992
Income before provision for income taxes	37,707	33,757
Provision for income taxes	6,411	9,522
Net income	31,296	24,235
Trust and Investment Services [Member]
Segment Reporting Information [Line Items]
Non-interest income	6,503	6,143
Non-interest expense	3,677	3,392
Income before provision for income taxes	2,826	2,751
Provision for income taxes	593	1,100
Net income	$ 2,233	$ 1,651

XML

Subsequent Events - Additional Information (Detail) $ / shares in Units, $ in Thousands	Apr. 19, 2018 USD ($) Branch $ / shares shares	Apr. 05, 2018 USD ($) shares	Mar. 31, 2018 USD ($) Branches	Dec. 31, 2017 USD ($)
Subsequent Event [Line Items]
Total Assets			$ 10,245,419	$ 9,816,178
Deposits			7,226,326	7,043,588
Portfolio loans, net of unearned income			6,322,538	$ 6,341,441
First Sentry Bancshares, Inc. [Member]
Subsequent Event [Line Items]
Total Assets			705,100
Deposits			577,400
Portfolio loans, net of unearned income			$ 459,500
Number of branches | Branches			5
First Sentry Bancshares, Inc. [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Value of acquisition		$ 107,500
Number of shares issued for acquisition | shares		2,500,000
Cash paid for acquisition		$ 1,000
Merger related expenses		$ 200
Farmers Capital Bank Corporation [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Deposits	$ 1,400,000
Portfolio loans, net of unearned income	1,000,000
Value of acquisition	378,200
Total assets acquired	$ 1,700,000
Number of branches entered into definitive agreement and plan of merger | Branch	34
Number of shares issued for each acquiree share | shares	1.053
Cash paid in excess of shares issued | $ / shares	$ 5.00
Total consideration per share | $ / shares	$ 50.31