10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 10-Q

QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2018

Commission file number 0-23695

Brookline Bancorp, Inc.

(Exact name of registrant as specified in its charter)

Delaware	04-3402944
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
131 Clarendon Street, Boston, MA	02116
(Address of principal executive offices)	(Zip Code)

(617) 425-4600

(Registrant’s telephone number, including area code)

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  x  NO  o

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

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

Large accelerated filer	x	Accelerated filer	o
Non-accelerated filer	o (Do not check if a smaller reporting company)	Smaller Reporting Company	o
		Emerging growth company	o

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. o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).  YES  o  NO  x

At May 8, 2018, the number of shares of common stock, par value $0.01 per share, outstanding was 80,316,597.

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

FORM 10-Q

Table of Contents

		Page
Part I	Financial Information
Item 1.	Unaudited Consolidated Financial Statements
	Unaudited Consolidated Balance Sheets at March 31, 2018 and December 31, 2017	1
	Unaudited Consolidated Statements of Income for the Three Months Ended March 31, 2018 and 2017	2
	Unaudited Consolidated Statements of Comprehensive Income for the Three Months Ended March 31, 2018 and 2017	3
	Unaudited Consolidated Statements of Changes in Equity for the Three Months Ended March 31, 2018 and 2017	4
	Unaudited Consolidated Statements of Cash Flows for the Three Months Ended March 31, 2018 and 2017	5
	Notes to Unaudited Consolidated Financial Statements	7
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	53
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	88
Item 4.	Controls and Procedures	91
Part II	Other Information
Item 1.	Legal Proceedings	92
Item 1A.	Risk Factors	92
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	92
Item 3.	Defaults Upon Senior Securities	92
Item 4.	Mine Safety Disclosures	92
Item 5.	Other Information	92
Item 6.	Exhibits	92
	Signatures	93

PART I — FINANCIAL INFORMATION

Item 1. Unaudited Consolidated Financial Statements

BROOKLINE BANCORP, INC. AND SUBSIDIARIES Unaudited Consolidated Balance Sheets
	At March 31, 2018			At December 31, 2017
	(In Thousands Except Share Data)
ASSETS
Cash and due from banks	$	34,713		$	25,622
Short-term investments	49,743			35,383
Total cash and cash equivalents	84,456			61,005
Investment securities available-for-sale	558,357			540,124
Investment securities held-to-maturity (fair value of $114,810 and $108,523, respectively)	117,352			109,730
Total investment securities	675,709			649,854
Loans held-for-sale	756			2,628
Loans and leases:
Commercial real estate loans	3,240,258			3,075,777
Commercial loans and leases	1,707,002			1,624,111
Consumer loans	1,167,201			1,030,791
Total loans and leases	6,114,461			5,730,679
Allowance for loan and lease losses	(58,714		)	(58,592		)
Net loans and leases	6,055,747			5,672,087
Restricted equity securities	66,164			59,369
Premises and equipment, net of accumulated depreciation of $65,150 and $63,423, respectively	80,268			80,283
Deferred tax asset	19,198			15,061
Goodwill	160,896			137,890
Identified intangible assets, net of accumulated amortization of $34,205 and $33,738, respectively	7,697			6,044
Other real estate owned ("OREO") and repossessed assets, net	3,963			4,419
Other assets	93,260			91,609
Total assets	$	7,248,114		$	6,780,249
LIABILITIES AND STOCKHOLDERS' EQUITY
Deposits:
Demand checking accounts	$	987,153		$	942,583
Interest-bearing deposits:
NOW accounts	342,374			350,568
Savings accounts	637,920			646,359
Money market accounts	1,862,351			1,724,363
Certificate of deposit accounts	1,361,722			1,207,470
Total interest-bearing deposits	4,204,367			3,928,760
Total deposits	5,191,520			4,871,343
Borrowed funds:
Advances from the Federal Home Loan Bank of Boston ("FHLBB")	982,533			889,909
Subordinated debentures and notes	83,311			83,271
Other borrowed funds	33,585			47,639
Total borrowed funds	1,099,429			1,020,819
Mortgagors' escrow accounts	8,395			7,686
Accrued expenses and other liabilities	74,024			67,818
Total liabilities	6,373,368			5,967,666
Commitments and contingencies (Note 12)
Stockholders' Equity:
Brookline Bancorp, Inc. stockholders' equity:
Common stock, $0.01 par value; 200,000,000 shares authorized; 85,177,172 shares issued and 81,695,695 shares issued, respectively	852			817
Additional paid-in capital	755,843			699,976
Retained earnings, partially restricted	172,934			161,217
Accumulated other comprehensive loss	(11,666		)	(5,950		)
Treasury stock, at cost; 4,401,333 shares and 4,440,665 shares, respectively	(51,454		)	(51,454		)
Unallocated common stock held by Employee Stock Ownership Plan ("ESOP"); 134,238 shares and 142,332 shares, respectively	(732		)	(776		)
Total Brookline Bancorp, Inc. stockholders' equity	865,777			803,830
Noncontrolling interest in subsidiary	8,969			8,753
Total stockholders' equity	874,746			812,583
Total liabilities and stockholders' equity	$	7,248,114		$	6,780,249

See accompanying notes to unaudited consolidated financial statements.

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BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Unaudited Consolidated Statements of Income

	Three Months Ended March 31,
	2018		2017
	(In Thousands Except Share Data)
Interest and dividend income:
Loans and leases	$	67,272	$	58,558
Debt securities	3,323		3,000
Marketable and restricted equity securities	924		726
Short-term investments	120		67
Total interest and dividend income	71,639		62,351
Interest expense:
Deposits	7,099		5,080
Borrowed funds	5,049		4,173
Total interest expense	12,148		9,253
Net interest income	59,491		53,098
Provision for credit losses	641		13,402
Net interest income after provision for credit losses	58,850		39,696
Non-interest income:
Deposit fees	2,463		2,252
Loan fees	290		261
Loan level derivative income, net	866		402
Gain on sales of investment securities, net	1,162		11,393
Gain on sales of loans and leases held-for-sale	299		353
Other	1,088		1,247
Total non-interest income	6,168		15,908
Non-interest expense:
Compensation and employee benefits	22,314		19,784
Occupancy	3,959		3,645
Equipment and data processing	4,618		4,063
Professional services	1,144		1,106
FDIC insurance	635		855
Advertising and marketing	1,057		817
Amortization of identified intangible assets	467		532
Merger and acquisition expense	2,905		—
Other	2,839		2,954
Total non-interest expense	39,938		33,756
Income before provision for income taxes	25,080		21,848
Provision for income taxes	5,652		7,835
Net income before noncontrolling interest in subsidiary	19,428		14,013
Less net income attributable to noncontrolling interest in subsidiary	795		568
Net income attributable to Brookline Bancorp, Inc.	$	18,633	$	13,445
Earnings per common share:
Basic	$	0.24	$	0.19
Diluted	0.24		0.19
Weighted average common shares outstanding during the year:
Basic	77,879,593		70,386,766
Diluted	78,167,800		70,844,096
Dividends declared per common share	$	0.10	$	0.09

See accompanying notes to unaudited consolidated financial statements.

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BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Unaudited Consolidated Statements of Comprehensive Income

	Three Months Ended March 31,
	2018			2017
	(In Thousands)
Net income before noncontrolling interest in subsidiary	$	19,428		$	14,013
Investment securities available-for-sale:
Unrealized securities holding (losses) gains	(7,401		)	870
Income tax expense (benefit)	1,632			(313		)
Net unrealized securities holding (losses) gains before reclassification adjustments, net of taxes	(5,769		)	557
Less reclassification adjustments for securities gains included in net income:
Loss on sales of securities, net	(68		)	—
Income tax expense	15			—
Net reclassification adjustments for securities gains included in net income	(53		)	—
Net unrealized securities holding (losses) gains	(5,716		)	557
Postretirement benefits:
Adjustment of accumulated obligation for postretirement benefits	—			—
Income tax expense	—			—
Net adjustment of accumulated obligation for postretirement benefits	—			—
Other comprehensive (loss) income, net of taxes	(5,716		)	557
Comprehensive income	13,712			14,570
Net income attributable to noncontrolling interest in subsidiary	795			568
Comprehensive income attributable to Brookline Bancorp, Inc.	$	12,917		$	14,002

See accompanying notes to unaudited consolidated financial statements.

3

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Unaudited Consolidated Statements of Changes in Stockholders' Equity

Three Months Ended March 31, 2018 and 2017

	Common Stock		Additional Paid-in Capital		Retained Earnings			Accumulated Other Comprehensive Loss			Treasury Stock			Unallocated Common Stock Held by ESOP			Total Brookline Bancorp, Inc. Stockholders' Equity			Noncontrolling Interest in Subsidiary			Total Stockholders' Equity
	(In Thousands)
Balance at December 31, 2017	$	817	$	699,976	$	161,217		$	(5,950	)	$	(51,454	)	$	(776	)	$	803,830		$	8,753		$	812,583
Net income attributable to Brookline Bancorp, Inc.	—		—		18,633			—			—			—			18,633			—			18,633
Net income attributable to noncontrolling interest in subsidiary	—		—		—			—			—			—			—			795			795
Common stock issued for acquisition	35		55,146		—			—			—			—			55,181			—			55,181
Issuance of noncontrolling units	—		—		—			—			—			—			—			129			129
Other comprehensive income	—		—					(5,716		)	—			—			(5,716		)	—			(5,716		)
Common stock dividends of $0.09 per share	—		—		(6,916		)	—			—			—			(6,916		)	—			(6,916		)
Dividend distribution to owners of noncontrolling interest in subsidiary	—		—		—			—			—			—			—			(708		)	(708		)
Compensation under recognition and retention plan	—		633		—			—			—			—			633			—			633
Common stock held by ESOP committed to be released (8,094 shares)	—		88		—			—			—			44			132			—			132
Balance at March 31, 2018	$	852	$	755,843	$	172,934		$	(11,666	)	$	(51,454	)	$	(732	)	$	865,777		$	8,969		$	874,746

	Common Stock		Additional Paid-in Capital		Retained Earnings			Accumulated Other Comprehensive (Loss) Income			Treasury Stock			Unallocated Common Stock Held by ESOP			Total Brookline Bancorp, Inc. Stockholders' Equity			Noncontrolling Interest in Subsidiary			Total Stockholders' Equity
	(In Thousands)
Balance at December 31, 2016	$	757	$	616,734	$	136,671		$	(3,818	)	$	(53,837	)	$	(963	)	$	695,544		$	7,205		$	702,749
Net income attributable to Brookline Bancorp, Inc.	—		—		13,445			—			—			—			13,445			—			13,445
Net income attributable to noncontrolling interest in subsidiary	—		—		—			—			—			—			—			568			568
Issuance of noncontrolling interest	—		—		—			—			—			—			—			118			118
Other comprehensive income	—		—					557			—			—			557			—			557
Common stock dividends of $0.09 per share	—		—		—			—			—			—			—			—			—
Dividend distribution to owners of noncontrolling interest in subsidiary	—		—		(6,350		)	—			—			—			(6,350		)	(515		)	(6,865		)
Compensation under recognition and retention plans	—		559		—			—			—			—			559			—			559
Common stock held by ESOP committed to be released (8,589 shares)	—		71		—			—			—			47			118			—			118
Balance at March 31, 2017	$	757	$	617,364	$	143,766		$	(3,261	)	$	(53,837	)	$	(916	)	$	703,873		$	7,376		$	711,249

See accompanying notes to unaudited consolidated financial statements.

4

BROOKLINE BANCORP, INC. AND SUBSIDIARIES Unaudited Consolidated Statements of Cash Flows
	Three Months Ended March 31,
	2018			2017
	(In Thousands)
Cash flows from operating activities:
Net income attributable to Brookline Bancorp, Inc.	$	18,633		$	13,445
Adjustments to reconcile net income to net cash provided from operating activities:
Net income attributable to noncontrolling interest in subsidiary	795			568
Provision for credit losses	641			13,402
Origination of loans and leases held-for-sale	(7,198		)	(8,493		)
Proceeds from sales of loans and leases held-for-sale, net	9,362			13,246
Deferred income tax benefit	(2,520		)	(4,925		)
Depreciation of premises and equipment	1,801			1,795
Amortization of investment securities premiums and discounts, net	507			416
Amortization of deferred loan and lease origination costs, net	1,625			1,626
Amortization of identified intangible assets	467			532
Amortization of debt issuance costs	25			25
Amortization (accretion) of acquisition fair value adjustments, net	1,185			(617		)
Gain on sales of investment securities, net	(1,162		)	(11,393		)
Gain on sales of loans and leases held-for-sale	(299		)	(353		)
Gain on sales of OREO and other repossessed assets, net	—			(10		)
Write-down of OREO and other repossessed assets	197			56
Compensation under recognition and retention plans	682			579
ESOP shares committed to be released	132			118
Net change in:
Cash surrender value of bank-owned life insurance	(254		)	(256		)
Other assets	(1,397		)	1,986
Accrued expenses and other liabilities	6,143			(2,781		)
Net cash provided from operating activities	29,365			18,966
Cash flows from investing activities:
Proceeds from sales of investment securities available-for-sale	1,470			11,515
Proceeds from maturities, calls, and principal repayments of investment securities available-for-sale	21,632			19,592
Purchases of investment securities available-for-sale	(49,108		)	(23,935		)
Proceeds from maturities, calls, and principal repayments of investment securities held to maturity	1,158			1,300
Purchases of investment securities held-to-maturity	(8,915		)	(14,873		)
Proceeds from redemption/sales of restricted equity securities	1,230			—
Purchase of restricted equity securities	(6,795		)	(3,676		)
Proceeds from sales of loans and leases held-for-investment, net	285			698
Net increase in loans and leases	(386,752		)	(59,893		)
Acquisitions, net of cash and cash equivalents acquired	(25,126		)	—
Purchase of premises and equipment, net	(1,827		)	(2,659		)
				(Continued)

See accompanying notes to unaudited consolidated financial statements.

5

BROOKLINE BANCORP, INC. AND SUBSIDIARIES Unaudited Consolidated Statements of Cash Flows (Continued)
	Three Months Ended March 31,
	2018			2017
	(In Thousands)
Proceeds from sales of OREO and other repossessed assets	853			413
Net cash used for investing activities	(451,895		)	(71,518		)
Cash flows from financing activities:
Increase (decrease) in demand checking, NOW, savings and money market accounts	165,925			(8,798		)
Increase in certificates of deposit	153,091			49,625
Proceeds from FHLBB advances	3,250,390			1,294,000
Repayment of FHLBB advances	(3,157,766		)	(1,274,259		)
Decrease in other borrowed funds, net	(14,054		)	(6,570		)
Increase in mortgagors' escrow accounts, net	709			387
Common stock issued for acquisition	55,181			—
Payment of dividends on common stock	(6,916		)	(6,350		)
Proceeds from issuance of noncontrolling units	129			118
Payment of dividends to owners of noncontrolling interest in subsidiary	(708		)	(515		)
Net cash provided from financing activities	445,981			47,638
Net increase (decrease) in cash and cash equivalents	23,451			(4,914		)
Cash and cash equivalents at beginning of period	61,005			67,657
Cash and cash equivalents at end of period	$	84,456		$	62,743
Supplemental disclosure of cash flow information:
Cash paid during the period for:
Interest on deposits, borrowed funds and subordinated debt	$	12,880		$	10,789
Income taxes	928			4,861
Non-cash investing activities:
Transfer from loans and leases held-for-sale to loans and leases	$	—		$	7,500
Transfer from loans to other real estate owned	594			1,346
Acquisition of First Commons Bank, N.A.:
Fair value of assets acquired, net of cash and cash equivalents acquired	$	292,025		$	—
Fair value of liabilities assumed	278,988			—

See accompanying notes to unaudited consolidated financial statements.

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BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

At and for the Three Months Ended March 31, 2018 and 2017

(1) Basis of Presentation

Overview

Brookline Bancorp, Inc. (the "Company") is a bank holding company (within the meaning of the Bank Holding Company Act of 1956, as amended) and the parent of Brookline Bank, a Massachusetts-chartered savings bank; Bank Rhode Island ("BankRI"), a Rhode Island-chartered financial institution; and First Ipswich Bank ("First Ipswich"), a Massachusetts-chartered trust company (collectively referred to as the "Banks"). The Banks are all members of the Federal Reserve System. The Company is also the parent of Brookline Securities Corp. ("BSC"). The Company's primary business is to provide commercial, business and retail banking services to its corporate, municipal and retail customers through the Banks and its non-bank subsidiaries.

On March 1, 2018, the Company completed the acquisition of First Commons Bank, N.A. ("First Commons Bank"). First Commons Bank was merged with and into Brookline Bank. Brookline Bank, which includes its wholly-owned subsidiaries BBS Investment Corp., Longwood Securities Corp. ("LSC") and its 84.1%-owned subsidiary, Eastern Funding LLC ("Eastern Funding"), operates 27 full-service banking offices in the greater Boston metropolitan area, including two additional branches from the First Commons Bank acquisition. BankRI, which includes its wholly-owned subsidiaries, Acorn Insurance Agency, BRI Realty Corp., Macrolease Corporation ("Macrolease"), BRI Investment Corp. and its wholly-owned subsidiary, BRI MSC Corp., operates 20 full-service banking offices in the greater Providence, Rhode Island area. First Ipswich, which includes its wholly-owned subsidiaries First Ipswich Insurance Agency and First Ipswich Securities II Corp., operates six full-service banking offices on the north shore of eastern Massachusetts.

The Company's activities include acceptance of commercial, municipal and retail deposits, origination of mortgage loans on commercial and residential real estate located principally in all New England states, origination of commercial loans and leases to small- and mid-sized businesses, investment in debt and equity securities, and the offering of cash management and investment advisory services. The Company also provides specialty equipment financing through its subsidiaries Eastern Funding, which is based in New York City, New York, and Macrolease, which is based in Plainview, New York.

The Company and the Banks are supervised, examined and regulated by the Board of Governors of the Federal Reserve System ("FRB"). As a Massachusetts-chartered savings bank and trust company respectively, Brookline Bank and First Ipswich are also subject to regulation under the laws of the Commonwealth of Massachusetts and the jurisdiction of the Massachusetts Division of Banks. As a Rhode Island-chartered financial institution, BankRI is subject to regulation under the laws of the State of Rhode Island and the jurisdiction of the Banking Division of the Rhode Island Department of Business Regulation.

The Federal Deposit Insurance Corporation ("FDIC") offers insurance coverage on all deposits up to $250,000 per depositor at each of the Banks. As FDIC-insured depository institutions, the Banks are also secondarily subject to supervision, examination and regulation by the FDIC. Additionally, as a Massachusetts-chartered savings bank, the deposits of Brookline Bank are insured by the Depositors Insurance Fund ("DIF"), a private industry-sponsored insurance company. The DIF insures savings bank deposits in excess of the FDIC insurance limits. As such, Brookline Bank offers 100% insurance on all deposits as a result of a combination of insurance from the FDIC and the DIF. Brookline Bank is required to file reports with the DIF.

Basis of Financial Statement Presentation

The unaudited consolidated financial statements of the Company presented herein have been prepared pursuant to the rules of the Securities and Exchange Commission (“SEC”) for quarterly reports on Form 10-Q and do not include all of the information and note disclosures required by U.S. generally accepted accounting principles (“GAAP”). In the opinion of Management, all adjustments (consisting of normal recurring adjustments) and disclosures considered necessary for the fair presentation of the accompanying consolidated financial statements have been included. Interim results are not necessarily reflective of the results of the entire year. The accompanying unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Annual Report on Form 10-K for the fiscal year ended December 31, 2017. 

The unaudited consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All significant intercompany transactions and balances are eliminated in consolidation.

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BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

In preparing these consolidated financial statements, Management is required to make significant estimates and assumptions that affect the reported amounts of assets, liabilities, income, expenses and disclosure of contingent assets and liabilities. Actual results could differ from those estimates based upon changing conditions, including economic conditions and future events. Material estimates that are particularly susceptible to significant change in the near-term include the determination of the allowance for loan and lease losses, the determination of fair market values of assets and liabilities, including acquired loans and leases, the review of goodwill and intangibles for impairment and the review of deferred tax assets for valuation allowances.

The judgments used by Management in applying these critical accounting policies may be affected by a further and prolonged deterioration in the economic environment, which may result in changes to future financial results. For example, subsequent evaluations of the loan and lease portfolio, in light of the factors then prevailing, may result in significant changes in the allowance for loan and lease losses in future periods, and the inability to collect outstanding principal may result in increased loan and lease losses.

Reclassification

Certain previously reported amounts have been reclassified to conform to the current year's presentation.

Recent Accounting Pronouncements

In February 2018, FASB issued ASU 2018-03, Technical Corrections and Improvements to Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. This ASU was issued to add improvements to update ASU 2016-01 to increase stakeholders’ awareness of the amendments and to expedite the improvements. This ASU is effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years beginning after June 15, 2018. Public business entities with fiscal years beginning between December 15, 2017 and June 15, 2018, are not required to adopt these amendments until the interim period beginning after June 15, 2018, and public business entities with fiscal years beginning between June 15, 2018, and December 15, 2018, are not required to adopt these amendments before adopting the amendments in Update 2016-01. Management has determined that ASU 2018-03 does apply, but has not determined the impact, if any, as of March 31, 2018.

In February 2018, the FASB issued Accounting Standards Update (ASU) No. 2018-02, "Income Statement-Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income" was issued to address a narrow-scope financial reporting issue that arose as a consequence of the change in the tax law. On December 22, 2017, the U.S. federal government enacted a tax bill, H.R.1, An Act to Provide for Reconciliation Pursuant to Titles II and V of the Concurrent Resolution on the Budget for Fiscal Year 2018 (the “Tax Reform Act”). The ASU No. 2018-02 requires a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the newly enacted federal corporate income tax rate. The amount of the reclassification would be the difference between the historical corporate income tax rate of 35 percent and the newly enacted 21 percent corporate income tax rate. The ASU No. 2018-02 is effective for all entities for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years with early adoption permitted, including adoption in any interim period, for (i) public business entities for reporting periods for which financial statements have not yet been issued and (ii) all other entities for reporting periods for which financial statements have not yet been made available for issuance. The changes are required to be applied retrospectively to each period (or periods) in which the effect of the change in the U.S. federal corporate income tax rate in the Tax Cuts and Jobs Act of 2017 is recognized. Management early adopted this ASU as of December 31, 2017, which resulted in the reclassification from accumulated other comprehensive loss to retained earnings totaling $1.1 million, reflected in the Consolidated Statements of Changes in Stockholders' Equity.

In November 2017, the FASB issued ASU 2017-14, Income Statement-Reporting Comprehensive Income (Topic 220), Revenue Recognition (Topic 605), and Revenue from Contracts with Customers (Topic 606): Amendments to SEC Paragraphs Pursuant to Staff Accounting Bulletin No. 116 and SEC Release No. 33-10403. This ASU was issued to amend certain SEC paragraphs pursuant to the SEC Staff Accounting Bulletin No.116 and SEC Release No. 33-10403, which bring existing guidance into conformity with Topic 606, Revenue from Contract with Customers. The ASU was effective for annual periods beginning after December 15, 2017. Management has determined that this ASU does apply as of January 1, 2018 and has determined the impact to be immaterial as of March 31, 2018.

8

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

In May 2017, the FASB issued ASU 2017-09, Compensation-Stock Compensation (Topic 718): Scope of Modification Accounting. FASB issued this Update to address the diversity in practice as well as the cost and complexity when applying the guidance in Topic 718, Compensation - Stock Compensation, to a change to the terms or conditions of a share-based payment award. For public entities, this ASU is effective for annual reporting periods beginning after December 15, 2017. Management has determined that this ASU does apply as of January 1, 2018 and has determined the impact to be immaterial as of March 31, 2018.

In March 2017, the FASB issued Accounting Standards Update ASU 2017-07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost (Topic 715). This ASU was issued primarily to improve the presentation of net periodic pension cost and net periodic postretirement benefit cost. This ASU is effective for annual reporting periods beginning after December 15, 2017. Management has determined that this ASU does apply as of January 1, 2018 and has determined the impact to be immaterial as of March 31, 2018.

In January 2017, the FASB issued ASU 2017-04, Intangibles - Goodwill and Other (Topic 350). This ASU was issued to simplify the subsequent measurement of goodwill by eliminating Step 2 from the goodwill impairment test. For public entities, this ASU is effective for the fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted and application should be on a prospective basis. Management has evaluated this ASU and as of December 31, 2017, the Company has adopted the ASU and determined the impact to be immaterial as of March 31, 2018.

In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230). This ASU was issued to provide clarification and uniformity on the presentation and classification of certain cash receipts and cash payments in the statement of cash flows under Topic 230. Early adoption is permitted as of the fiscal years beginning after December 15, 2017, for public entities that file with the SEC. The Company adopted ASU 2016-15 effective January 1, 2017 and the adoption did not have a material impact on the Company’s consolidated financial statements.

In June 2016, the FASB issued ASU 2016-13, Financial instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. The intent of this ASU is to replace the current GAAP method of calculating credit losses. Current GAAP uses a higher threshold at which likely losses can be calculated and recorded. The new process will require institutions to account for likely losses that originally would not have been part of the calculation. The calculation will incorporate future forecasting in addition to historical and current measures. For public entities that file with the SEC, this ASU is effective for the fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. This ASU must be applied prospectively to debt securities marked as other than temporarily impaired. A retrospective approach will be applied cumulatively to retained earnings. Early adoption is permitted as of the fiscal years beginning after December 15, 2018. Management has determined that ASU 2016-13 does apply, but has not determined the impact, if any, as of March 31, 2018. In preparation for the adoption in 2020 of this ASU, management formed a steering committee to oversee the adoption of ASU 2016-13. The steering committee along with a project team has developed an approach for implementation and has selected a third party software service provider. The project team is in the testing phase of the third party software.

In March 2016, the FASB issued ASU 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. This ASU was issued as part of the FASB Simplification Initiative which intends to reduce the complexity of GAAP while improving usefulness to users. The ASU was effective for annual periods beginning after December 15, 2016, and interim periods within those annual reporting periods with early adoption available. The Company adopted ASU 2016-09 effective January 1, 2017 and the adoption did not have a material impact on the Company’s consolidated financial statements.

In February 2016, FASB issued ASU 2016-02, Leases. This ASU requires lessees to record most leases on their balance sheet but recognize expenses on their income statements in a manner similar to current accounting. This ASU also eliminates current real estate-specific provisions for all companies. For lessors, this ASU modifies the classification criteria and the accounting for sales-type and direct financing leases. This ASU is effective for fiscal years beginning after December 15, 2018, including interim periods therein. Early adoption is permitted. Management believes that this ASU applies and has not determined the impact, if any, as of March 31, 2018. Management has met to discuss the impact and will assemble a project team to assess steps required for adoption. The steps will include a review of third party lease software service providers.

9

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

In January 2016, the FASB issued ASU 2016-01, Financial Instruments. This ASU significantly revises an entity’s accounting related to (1) the classification and measurement of investments in equity securities and (2) the presentation of certain fair value changes for financial liabilities measured at fair value. It also amends certain disclosure requirements associated with the fair value of financial instruments. This ASU is effective for fiscal years beginning after December 15, 2017, including interim periods therein. Management has determined that ASU 2016-01 does apply as of January 1, 2018 and management has determined the impact to be immaterial as of March 31, 2018.

Accounting Standards Update No. 2014-09, “Revenue from Contracts with Customers” (“ASU 2014-09”), was issued in May 2014 and provides a revenue recognition framework for any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of non-financial assets unless those contracts are within the scope of other accounting standards. As issued, ASU 2014-09 was effective for annual periods beginning after December 15, 2016, including interim periods within that reporting period with early adoption not permitted. The standard permits the use of either the retrospective or cumulative effect transition method. In August 2015, Accounting Standards Update No. 2015-14, “Deferral of the Effective Date” (“ASU 2015-14”) was issued and delayed the effective date of ASU 2014-09 to annual and interim periods in fiscal years beginning after December 15, 2017. In 2016, Accounting Standards Update No. 2016-08, “Principal versus Agent Considerations” (“ASU 2016-08”), Accounting Standards Update No. 2016-10, “Identifying Performance Obligations and Licensing” (“ASU 2016-10”) and Accounting Standards Update No. 2016-12, “Narrow-Scope Improvements and Practical Expedients” (“ASU 2016-12”) were issued. These ASUs did not change the core principle for revenue recognition in Topic 606; instead, the amendments provided more detailed guidance in a few areas and additional implementation guidance and examples to reduce the degree of judgment necessary to comply with Topic 606. The effective date and transition requirements for ASU 2016-08, ASU 2016-10 and ASU 2016-12 were the same as those provided by ASU 2015-14. Management assembled a project team to address the changes pursuant to Topic 606. The project team completed a scope assessment and contract review for in-scope revenue streams. Topic 606 did not apply to several income generating streams. Management excluded from their analysis, income associated with financial instruments, gains on sale of investment securities and loans, gains on Low Income Housing Tax Credits ("LIHTC") and loan level derivative income. Revenue streams that were included were service charges on deposit accounts, loan fees, and income received through a third party relationship. Management adopted the provisions of ASU 2014-09 effective January 1, 2018, using the modified retrospective transition method. The adoption did not have a material impact on the Company's consolidated financial statements. See Note 13, "Revenue from Contracts with Customers," for further details.

(2) Acquisitions

First Commons Bank, N.A.

On March 1, 2018, the Company completed the acquisition (the “Transaction”) of First Commons Bank. First Commons Bank was merged with and into the Company’s subsidiary bank, Brookline Bank. First Commons Bank has two branch locations in Newton Centre and Wellesley, Massachusetts. These branch locations are expected to be closed on June 1, 2018 and consolidated into Brookline Bank’s existing branch locations in Newton Centre and Wellesley, Massachusetts.

The Transaction qualified as a tax-free reorganization for federal income tax purposes. The total Transaction consideration was $56.0 million. First Commons Bank stockholders received, for each share of First Commons Bank common stock, the right to receive 1.089 shares of the Company’s common stock with cash in lieu of fractional shares, options, and warrants, resulting in a total cash consideration payment of $851 thousand and an increase to the Company’s outstanding shares of 3,481,477 shares.

The Company accounted for the Transaction using the estimated fair value of assets and liabilities assumed as of the acquisition date. The excess of consideration paid over the fair value of identifiable net assets was recorded as goodwill in the consolidated financial statements. Accordingly, the Company recorded merger and acquisition expenses of $2.9 million for the three months ended March 31, 2018.

10

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

The following table summarizes the estimated fair value of the assets acquired and liabilities assumed as of the date of the acquisition:

	Net Assets Acquired at Fair Value
	(In Thousands)
ASSETS
Cash	$	42,995
Restricted stock	1,884
Loans	262,095
Premises and equipment	583
Goodwill	23,005
Core deposit and other intangibles	2,122
Other assets	2,336
Total assets acquired	335,020
LIABILITIES
Deposits	273,701
Borrowings	5,000
Other liabilities	287
Total liabilities assumed	278,988
Purchase price	$	56,032

Fair values of the major categories of assets acquired and liabilities assumed were determined as follows:

Cash and Cash Equivalents

The fair values of cash and cash equivalents approximate the respective carrying amounts because the instruments are payable on demand or have short-term maturities.

Restricted Stock

The fair value of restricted stock approximate the respective carrying amount. The stock is comprised of $880 thousand of FHLBB stock and $1.0 million of FRB stock. These amounts were transferred to the Brookline Bank name at each respective institution.

Loans

The loans acquired were recorded at fair value without a carryover of the allowance for loan losses. There were no credit related issues with the acquired portfolio. For the loan purchase accounting, management used the following assumptions: no specific credit mark valuations as determined by the Company's Credit Risk Management; segregation of portfolio into certain loan categories; loan level valuations versus a pooled approach; prepayment rate assumptions and market discount rates.

The Company recorded a $1.6 million discount from the results of the loan accounting valuation. There was $27 thousand of accretion recorded as of March 31, 2018.

Deposits - Core Deposit Intangible ("CDI")

Accounts included in the CDI include demand deposits, NOW accounts, money market accounts and savings accounts. The fair value of the core deposit intangible was derived from using the following assumptions: account retention rates, alternative cost of funds, effective cost of funds, cost savings, present value of annual net cost savings and market discount rate.

The Company recorded a $2.1 million CDI from the results of the deposit valuation. There was $41 thousand of amortization recorded as of March 31, 2018.

11

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

Certificate of Deposits

The certificates of deposits were recorded at fair value. The determination of the fair value was calculated using a discounted cash flow analysis, which involved present valuing the contractual payments over the remaining life of the certificate of deposit at market based-rates.

The Company recorded a $1.2 million discount from the results of the certificate of deposit valuation. There was $82 thousand of accretion recorded as of March 31, 2018.

Borrowings

The borrowings at acquisition typically require a fair market valuation performed as of the acquisition date. The difference between the current recorded balance and the fair market value will be reflected as a fair value mark. The Company’s Treasury team performed two valuations to review the fair value mark. After reviewing the results, the fair value mark was immaterial and management decided not to record any fair market value adjustment on the acquired borrowings.

12

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

(3) Investment Securities

The following tables set forth investment securities available-for-sale and held-to-maturity at the dates indicated:

	At March 31, 2018
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(In Thousands)
Investment securities available-for-sale:
GSE debentures	$	184,760	$	71	$	3,863	$	180,968
GSE CMOs	125,061		18		5,382		119,697
GSE MBSs	197,083		231		5,129		192,185
SBA commercial loan asset-backed securities	70		—		1		69
Corporate debt obligations	56,784		5		917		55,872
U.S. Treasury bonds	8,794		—		197		8,597
Trust preferred securities	—		—		—		—
Marketable equity securities	980		6		17		969
Total investment securities available-for-sale	$	573,532	$	331	$	15,506	$	558,357
Investment securities held-to-maturity:
GSE debentures	$	50,529	$	4	$	1,358	$	49,175
GSEs MBSs	13,344		—		340		13,004
Municipal obligations	52,979		11		856		52,134
Foreign government obligations	500		—		3		497
Total investment securities held-to-maturity	$	117,352	$	15	$	2,557	$	114,810

	December 31, 2017
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(In Thousands)
Investment securities available-for-sale:
GSE debentures	$	151,483	$	70	$	1,629	$	149,924
GSE CMOs	131,082		27		4,087		127,022
GSE MBSs	191,281		354		2,322		189,313
SBA commercial loan asset-backed securities	73		—		1		72
Corporate debt obligations	62,811		110		238		62,683
U.S. Treasury bonds	8,785		7		62		8,730
Trust preferred securities	1,471		—		73		1,398
Marketable equity securities	978		13		9		982
Total investment securities available-for-sale	$	547,964	$	581	$	8,421	$	540,124
Investment securities held-to-maturity:
GSE debentures	$	41,612	$	—	$	811	$	40,801
GSEs MBSs	13,923		—		218		13,705
Municipal obligations	53,695		159		337		53,517
Foreign government obligations	500		—		—		500
Total investment securities held-to-maturity	$	109,730	$	159	$	1,366	$	108,523

As of March 31, 2018, the fair value of all investment securities available-for-sale was $558.4 million, with net unrealized losses of $15.2 million, compared to a fair value of $540.1 million and net unrealized losses of $7.8 million as of December 31, 2017. As of March 31, 2018, $512.1 million, or 91.7% of the portfolio, had gross unrealized losses of $15.5 million, compared to $469.2 million, or 86.9% of the portfolio, with gross unrealized losses of $8.4 million as of December 31, 2017.

13

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

As of March 31, 2018, the fair value of all investment securities held-to-maturity was $114.8 million, with net unrealized losses of $2.5 million, compared to a fair value of $108.5 million with net unrealized losses of $1.2 million as of December 31, 2017. As of March 31, 2018, $109.0 million, or 95.0% of the portfolio, had gross unrealized losses of $2.6 million. There were $92.9 million, or 85.6% of the portfolio, with gross unrealized losses of $1.4 million as of December 31, 2017.

Investment Securities as Collateral

As of March 31, 2018 and December 31, 2017, respectively, $463.1 million and $431.2 million of investment securities were pledged as collateral for repurchase agreements; municipal deposits; treasury, tax and loan deposits; swap agreements; FRB borrowings; and FHLBB borrowings. The Banks did not have any outstanding FRB borrowings as of March 31, 2018 and December 31, 2017.

Other-Than-Temporary Impairment ("OTTI")

Investment securities as of March 31, 2018 and December 31, 2017 that have been in a continuous unrealized loss position for less than twelve months or twelve months or longer are as follows:

	At March 31, 2018
	Less than Twelve Months				Twelve Months or Longer				Total
	Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses
	(In Thousands)
Investment securities available-for-sale:
GSE debentures	$	143,716	$	3,284	$	12,256	$	579	$	155,972	$	3,863
GSE CMOs	2,614		64		116,505		5,318		119,119		5,382
GSE MBSs	109,406		2,250		70,625		2,879		180,031		5,129
SBA commercial loan asset-backed securities	32		—		31		1		63		1
Corporate debt obligations	45,522		761		2,350		156		47,872		917
U.S. Treasury bonds	8,597		197		—		—		8,597		197
Trust preferred securities	—		—		—		—		—		—
Marketable equity securities	—		—		495		17		495		17
Temporarily impaired investment securities available-for-sale	309,887		6,556		202,262		8,950		512,149		15,506
Investment securities held-to-maturity:
GSE debentures	32,196		628		14,007		730		46,203		1,358
GSEs MBSs	1,872		34		11,081		306		12,953		340
Municipal obligations	42,717		591		6,644		265		49,361		856
Foreign government obligations	—		—		497		3		497		3
Temporarily impaired investment securities held-to-maturity	76,785		1,253		32,229		1,304		109,014		2,557
Total temporarily impaired investment securities	$	386,672	$	7,809	$	234,491	$	10,254	$	621,163	$	18,063

14

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

	December 31, 2017
	Less than Twelve Months				Twelve Months or Longer				Total
	Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses
	(In Thousands)
Investment securities available-for-sale:
GSE debentures	$	120,409	$	1,263	$	12,481	$	366	$	132,890	$	1,629
GSE CMOs	2,862		34		123,548		4,053		126,410		4,087
GSE MBSs	94,985		753		74,782		1,569		169,767		2,322
SBA commercial loan asset-backed securities	34		—		33		1		67		1
Corporate debt obligations	30,978		154		2,423		84		33,401		238
U.S. Treasury bonds	4,767		62		—		—		4,767		62
Trust preferred securities	—		—		1,398		73		1,398		73
Marketable equity securities	—		—		503		9		503		9
Temporarily impaired investment securities available-for-sale	254,035		2,266		215,168		6,155		469,203		8,421
Investment securities held-to-maturity:
GSE debentures	26,594		281		14,208		530		40,802		811
GSEs MBSs	1,996		15		11,674		203		13,670		218
Municipal obligations	30,542		235		7,408		102		37,950		337
Foreign government obligations	—		—		500		—		500		—
Temporarily impaired investment securities held-to-maturity	59,132		531		33,790		835		92,922		1,366
Total temporarily impaired investment securities	$	313,167	$	2,797	$	248,958	$	6,990	$	562,125	$	9,787

The Company performs regular analysis of the investment securities available-for-sale portfolio to determine whether a decline in fair value indicates that an investment security is OTTI. In making these OTTI determinations, management considers, among other factors, the length of time and extent to which the fair value has been less than amortized cost; projected future cash flows; credit subordination and the creditworthiness; capital adequacy and near-term prospects of the issuers.

Management also considers the Company's capital adequacy, interest-rate risk, liquidity and business plans in assessing whether it is more likely than not that the Company will sell or be required to sell the investment securities before recovery. If the Company determines that a decline in fair value is OTTI and that it is more likely than not that the Company will not sell or be required to sell the investment security before recovery of its amortized cost, the credit portion of the impairment loss is recognized in the Company's unaudited consolidated statement of income and the noncredit portion is recognized in accumulated other comprehensive income. The credit portion of the OTTI impairment represents the difference between the amortized cost and the present value of the expected future cash flows of the investment security. If the Company determines that a decline in fair value is OTTI and it is more likely than not that it will sell or be required to sell the investment security before recovery of its amortized cost, the entire difference between the amortized cost and the fair value of the security will be recognized in the Company's unaudited consolidated statement of income.

Investment Securities Available-For-Sale Impairment Analysis

The following discussion summarizes, by investment security type, the basis for evaluating if the applicable investment securities within the Company’s available-for-sale portfolio were OTTI as of March 31, 2018. Based on the analysis below and the determination that, it is more likely than not that the Company will not sell or be required to sell the investment securities before recovery of its amortized cost. The Company's ability and intent to hold these investment securities until recovery is supported by the Company's strong capital and liquidity positions as well as its historically low portfolio turnover. As such, management has determined that the investment securities are not OTTI as of March 31, 2018. If market conditions for

15

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

investment securities worsen or the creditworthiness of the underlying issuers deteriorates, it is possible that the Company may recognize additional OTTI in future periods.

U.S. Government-Sponsored Enterprises

The Company invests in securities issued by U.S. Government-sponsored enterprises ("GSEs"), including GSE debentures, mortgage-backed securities ("MBSs"), and collateralized mortgage obligations ("CMOs"). GSE securities include obligations issued by the Federal National Mortgage Association ("FNMA"), the Federal Home Loan Mortgage Corporation ("FHLMC"), the Government National Mortgage Association ("GNMA"), the FHLBB and the Federal Farm Credit Bank. As of March 31, 2018, only GNMA MBSs and CMOs, and Small Business Administration ("SBA") commercial loan asset-backed securities in our available-for-sale portfolio with an estimated fair value of $23.1 million were backed explicitly by the full faith and credit of the U.S. Government, compared to $23.7 million as of December 31, 2017.

As of March 31, 2018, the Company owned 60 GSE debentures with a total fair value of $181.0 million, and a net unrealized loss of $3.8 million. As of December 31, 2017, the Company held 48 GSE debentures with a total fair value of $149.9 million, with a net unrealized loss of $1.6 million. As of March 31, 2018, 51 of the 60 securities in this portfolio were in an unrealized loss position. As of December 31, 2017, 43 of the 48 securities in this portfolio were in an unrealized loss position. All securities are performing and backed by the implicit (FHLB/FNMA/FHLMC) or explicit (GNMA/SBA) guarantee of the U.S Government. During the three months endedMarch 31, 2018, the Company purchased a total of $33.9 million GSE debentures. This compares to $23.9 million purchased during the same period in 2017.

As of March 31, 2018, the Company owned 62 GSE CMOs with a total fair value of $119.7 million and a net unrealized loss of $5.4 million. As of December 31, 2017, the Company held 62 GSE CMOs with a total fair value of $127.0 million with a net unrealized loss of $4.1 million. As of March 31, 2018, 47 of the 62 securities in this portfolio were in an unrealized loss position. As of December 31, 2017, 47 of the 62 securities in this portfolio were in an unrealized loss position. All securities are performing and backed by the implicit (FHLB/FNMA/FHLMC) or explicit (GNMA) guarantee of the U.S Government. During the three months endedMarch 31, 2018 and 2017, the Company did not purchase any GSE CMOs.

As of March 31, 2018, the Company owned 195 GSE MBSs with a total fair value of $192.2 million and a net unrealized loss of $4.9 million. As of December 31, 2017, the Company held 194 GSE MBSs with a total fair value of $189.3 million with a net unrealized loss of $2.0 million. As of March 31, 2018, 94 of the 195 securities in this portfolio were in an unrealized loss position. As of December 31, 2017, 82 of the 194 securities in this portfolio were in an unrealized loss position. All securities are performing and backed by the implicit (FHLB/FNMA/FHLMC) or explicit (GNMA) guarantee of the U.S Government. During the three months endedMarch 31, 2018, the Company purchased a total of $15.2 million GSE MBSs, as compared to the same period in 2017, when the Company did not purchased any GSE MBSs.

SBA Commercial Loan Asset-Backed

As of March 31, 2018, the Company owned five SBA securities with a total fair value of $0.1 million, which approximated amortized cost. As of December 31, 2017, the Company owned five SBA securities with a total fair value of $0.1 million, which approximated amortized cost. As of March 31, 2018, four of the five securities in this portfolio were in an unrealized loss position. As of December 31, 2017, four of the five securities in this portfolio were in an unrealized loss position. All securities are performing and backed by the explicit guarantee of the U.S Government. During the three months endedMarch 31, 2018 and 2017, the Company did not purchase any SBA securities.

Corporate Obligations

The Company may invest in high-quality corporate obligations to provide portfolio diversification and improve the overall yield on the portfolio. As of March 31, 2018, the Company held 17 corporate obligation securities with a total fair value of $55.9 million and a net unrealized loss of $0.9 million. As of December 31, 2017, the Company held 19 corporate obligation securities with a total fair value of $62.7 million and a net unrealized loss of $0.1 million. As of March 31, 2018, 14 of the 17 securities in this portfolio were in an unrealized loss position. As of December 31, 2017, nine of the nineteen securities in this portfolio were in an unrealized loss position. Full collection of the obligations is expected because the financial condition of the issuers is sound, they have not defaulted on scheduled payments, the obligations are rated investment grade, and the Company has the ability and intent to hold the obligations for a period of time to recover the amortized cost. During the three months endedMarch 31, 2018 and 2017, the Company did not purchase any corporate obligations.

16

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

U.S. Treasury Bonds

The Company invests in securities issued by the U.S. government. As of March 31, 2018, the Company owned two U.S. Treasury bonds with a total fair value of $8.6 million and an unrealized loss of $0.2 million. This compares to two U.S. Treasury bonds with a total fair value of $8.7 million and an unrealized loss of $0.1 million as of December 31, 2017. During the three months endedMarch 31, 2018 and 2017, the Company did not purchase any U.S. Treasury bonds.

Trust Preferred Securities

Trust preferred securities represent subordinated debt issued by financial institutions. As of March 31, 2018, the Company sold the remaining two trust preferred securities with a total fair value of $1.4 million and a realized loss of $0.1 million. This compares to two trust preferred securities with a total fair value of $1.4 million and an unrealized loss of $0.1 million as of December 31, 2017.

Marketable Equity Securities

From time to time, the Company will invest in mutual funds for community reinvestment purposes. As of March 31, 2018 and December 31, 2017, the Company owned two marketable equity securities with a fair value of $1.0 million, which approximated amortized cost. As of March 31, 2018 and December 31, 2017, one of the two securities in this portfolio was in an unrealized loss position. During the three months endedMarch 31, 2018 and 2017, the Company did not purchase any marketable equity securities.

Investment Securities Held-to-Maturity Impairment Analysis

The following discussion summarizes by investment security type, the basis for evaluating if the applicable investment securities within the Company's held-to-maturity portfolio were OTTI at March 31, 2018. Management has the ability and the intent to hold the securities until maturity.

U.S. Government-Sponsored Enterprises

As of March 31, 2018, the Company owned 17 GSE debentures with a total fair value of $49.2 million and a net unrealized loss of $1.4 million. As of December 31, 2017, the Company owned 14 GSE debentures with a total fair value of $40.8 million and an unrealized loss of $0.8 million. As of March 31, 2018, 16 of the 17 securities in this portfolio were in an unrealized loss position. At December 31, 2017, all 14 of the securities in this portfolio were in unrealized loss positions. All securities are performing and backed by the implicit (FHLB/FNMA/FHLMC) or explicit (GNMA) guarantee of the U.S Government. During the three months endedMarch 31, 2018 and 2017, the Company purchased a total of $8.9 million and $14.9 million in GSE debentures, respectively.

As of March 31, 2018, the Company owned 11 GSE MBSs with a total fair value of $13.0 million and an unrealized loss of $0.3 million. As of December 31, 2017, the Company owned 11 GSE MBSs with a total fair value of $13.7 million and an unrealized loss of $0.2 million. As of March 31, 2018 and December 31, 2017, eight of the eleven securities in this portfolio were in an unrealized loss position. All securities are performing and backed by the implicit (FHLB/FNMA/FHLMC) or explicit (GNMA) guarantee of the U.S Government. During the three months endedMarch 31, 2018 and 2017, the Company did not purchase any GSE MBSs.

Municipal Obligations

The Company invests in certain state and municipal securities with high credit ratings for portfolio diversification and tax planning purposes. As of March 31, 2018, the Company owned 100 municipal obligation securities with a total fair value of $52.1 million and and a net unrealized loss of $0.8 million. As of December 31, 2017, the Company owned 100 municipal obligation securities with a total fair value of $53.5 million and an unrealized loss of $0.2 million. As of March 31, 2018, 93 of the 100 securities in this portfolio were in an unrealized loss position as compared to December 31, 2017, when 69 of the 100 securities were in an unrealized loss position. During the three months endedMarch 31, 2018 and 2017, the Company did not purchase any municipal obligations.

17

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

Foreign Government Obligations

As of March 31, 2018 and December 31, 2017, the Company owned one foreign government obligation security with a fair value of $0.5 million, which approximated cost. As of March 31, 2018 and December 31, 2017 respectively, the security was in an unrealized loss position. During the three months endedMarch 31, 2018 and 2017, the Company did not purchase any foreign government obligations.

Portfolio Maturities

The final stated maturities of the debt securities are as follows for the periods indicated:

	At March 31, 2018						At December 31, 2017
	Amortized Cost		Estimated Fair Value		Weighted Average Rate		Amortized Cost		Estimated Fair Value		Weighted Average Rate
	(Dollars in Thousands)
Investment securities available-for-sale:
Within 1 year	$	25,290	$	25,250	2.23	%	$	23,612	$	23,652	2.27	%
After 1 year through 5 years	162,284		159,464		2.13	%	142,772		142,029		2.05	%
After 5 years through 10 years	146,756		142,749		2.15	%	136,746		134,978		2.06	%
Over 10 years	238,222		229,925		2.15	%	243,856		238,483		2.06	%
	$	572,552	$	557,388	2.15	%	$	546,986	$	539,142	2.07	%
Investment securities held-to-maturity:
Within 1 year	$	1,470	$	1,463	1.00	%	$	918	$	916	0.78	%
After 1 year through 5 years	60,727		59,838		1.80	%	58,335		57,939		1.74	%
After 5 years through 10 years	41,863		40,556		1.98	%	36,589		35,998		1.79	%
Over 10 years	13,292		12,953		2.23	%	13,888		13,670		1.98	%
	$	117,352	$	114,810	1.90	%	$	109,730	$	108,523	1.78	%

Actual maturities of debt securities will differ from those presented above since certain obligations amortize and may also provide the issuer the right to call or prepay the obligation prior to scheduled maturity without penalty. MBSs and CMOs are included above based on their final stated maturities; the actual maturities, however, may occur earlier due to anticipated prepayments and stated amortization of cash flows.

As of March 31, 2018, issuers of debt securities with an estimated fair value of $30.8 million had the right to call or prepay the obligations. Of the $30.8 million, approximately $17.7 million matures in 1 - 5 years, $13.1 million matures in 6 - 10 years, and none mature after ten years. As of December 31, 2017, issuers of debt securities with an estimated fair value of approximately $58.8 million had the right to call or prepay the obligations. Of the $58.8 million, $32.7 million matures in 1-5 years, $25.2 million matures in 6-10 years, and $0.9 million matures after ten years.

Security Sales

On February 3, 2017, the Company, through BSC, received $319 in cash and 14.876 shares of Community Bank Systems, Inc. (“CBU”) common stock in exchange for each of the 9,721 shares of Northeast Retirement Services, Inc. (“NRS”) stock held by BSC. The exchange was completed in accordance with the merger agreement entered into between NRS and CBU. As part of the merger agreement, the Company was restricted to selling 5,071 shares of CBU per day in the open market. During the quarter ended March 31, 2017, the Company completed the sale of all the CBU shares required in the merger. When securities are sold, the adjusted cost of the specific security sold is used to compute the gain or loss on the sale. The table below includes the activity with respect to the sale of the CBU shares.

On March 6, 2018, the Company, through its wholly owned subsidiary, BSC, received $0.6 million in cash and 11,303 shares of CBU common stock as settlement for the indemnification escrow on the 12 month anniversary date of the merger between NRS and CBU. The Company subsequently sold all 11,303 shares of theCBU stock and recognized again on the sale of $0.6 million.

18

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

During the month of March, 2018, the Company, through Brookline Bank’s wholly owned subsidiary, LSC, sold two trust preferred securities with a book value of $1.5 million for a loss of $0.1 million. The table below includes the activity with respect to the sale of the trust preferred securities.

Sales of investment and restricted equity securities are summarized as follows:

	Three Months Ended March 31, 2018			Three Months Ended March 31, 2017
	(In Thousands)
Sales of marketable and restricted equity securities	$	2,700		$	11,393
Gross gains from sales	1,230			11,612
Gross losses from sales	(68		)	(219		)
Gain on sales of securities, net	$	1,162		$	11,393

(4) Loans and Leases

The following tables present loan and lease balances and weighted average coupon rates for the originated and acquired loan and lease portfolios at the dates indicated:

	At March 31, 2018
	Originated				Acquired				Total
	Balance		Weighted Average Coupon		Balance		Weighted Average Coupon		Balance		Weighted Average Coupon
	(Dollars In Thousands)
Commercial real estate loans:
Commercial real estate	$	2,129,110	4.28	%	$	148,918	4.44	%	$	2,278,028	4.29	%
Multi-family mortgage	740,603		4.21	%	52,987		4.56	%	793,590		4.23	%
Construction	136,784		4.80	%	31,856		—	%	168,640		3.89	%
Total commercial real estate loans	3,006,497		4.29	%	233,761		3.86	%	3,240,258		4.26	%
Commercial loans and leases:
Commercial	726,852		4.49	%	35,070		5.89	%	761,922		4.55	%
Equipment financing	888,494		7.35	%	3,847		5.94	%	892,341		7.34	%
Condominium association	52,739		4.52	%	—		—	%	52,739		4.52	%
Total commercial loans and leases	1,668,085		6.01	%	38,917		5.89	%	1,707,002		6.01	%
Consumer loans:
Residential mortgage	613,370		3.90	%	159,633		4.38	%	773,003		4.00	%
Home equity	315,085		4.42	%	49,785		4.75	%	364,870		4.47	%
Other consumer	29,187		4.92	%	141		18.00	%	29,328		4.98	%
Total consumer loans	957,642		4.10	%	209,559		4.48	%	1,167,201		4.17	%
Total loans and leases	$	5,632,224	4.77	%	$	482,237	4.29	%	$	6,114,461	4.73	%

19

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

	At December 31, 2017
	Originated				Acquired				Total
	Balance		Weighted Average Coupon		Balance		Weighted Average Coupon		Balance		Weighted Average Coupon
	(Dollars In Thousands)
Commercial real estate loans:
Commercial real estate	$	2,069,392	4.17	%	$	105,577	4.37	%	$	2,174,969	4.18	%
Multi-family mortgage	735,921		4.09	%	24,749		4.48	%	760,670		4.10	%
Construction	140,138		4.58	%	—		—	%	140,138		4.58	%
Total commercial real estate loans	2,945,451		4.17	%	130,326		4.39	%	3,075,777		4.18	%
Commercial loans and leases:
Commercial	696,825		4.35	%	8,179		5.77	%	705,004		4.37	%
Equipment financing	861,974		7.28	%	4,514		5.92	%	866,488		7.27	%
Condominium association	52,619		4.49	%	—		—	%	52,619		4.49	%
Total commercial loans and leases	1,611,418		5.92	%	12,693		5.82	%	1,624,111		5.92	%
Consumer loans:
Residential mortgage	604,897		3.81	%	55,168		4.28	%	660,065		3.85	%
Home equity	314,189		4.16	%	41,765		4.62	%	355,954		4.21	%
Other consumer	14,667		5.51	%	105		18.00	%	14,772		5.60	%
Total consumer loans	933,753		3.95	%	97,038		4.44	%	1,030,791		4.00	%
Total loans and leases	$	5,490,622	4.65	%	$	240,057	4.49	%	$	5,730,679	4.64	%

The net unamortized deferred loan origination fees and costs included in total loans and leases were $15.8 million and $15.5 million as of March 31, 2018 and December 31, 2017, respectively.

The Banks and subsidiaries lend primarily in all New England states, with the exception of equipment financing, 15.3% of which is in the greater New York and New Jersey metropolitan area and 84.7% of which is in other areas in the United States of America as of March 31, 2018.

Accretable Yield for the Acquired Loan Portfolio

The following table summarizes activity in the accretable yield for the acquired loan portfolio for the periods indicated:

	Three Months Ended March 31,
	2018			2017
	(In Thousands)
Balance at beginning of period	$	10,522		$	14,353
Accretion	(1,185		)	(1,407		)
Reclassification from (to) nonaccretable difference as a result of changes in expected cash flows	316			126
Balance at end of period	$	9,653		$	13,072

On a quarterly basis, subsequent to acquisition, management reforecasts the expected cash flows for acquired ASC 310-30 loans, taking into account prepayment speeds, probability of default and loss given defaults. Management compares cash flow projections per the reforecast to the original cash flow projections and determines whether any reduction in cash flow expectations are due to deterioration, or if the change in cash flow expectation is related to noncredit events. This cash flow analysis is used to evaluate the need for a provision for loan and lease losses and/or prospective yield adjustments. During the three months ended March 31, 2018 and 2017, accretable yield adjustments totaling $0.3 million and $0.1 million, respectively, were made for certain loan pools. These accretable yield adjustments, which are subject to continued re-assessment, will be recognized over the remaining lives of those pools.

20

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

Loans and Leases Pledged as Collateral

As of March 31, 2018 and December 31, 2017, there were $2.2 billion and $2.3 billion, respectively, of loans and leases pledged as collateral for repurchase agreements; municipal deposits; treasury, tax and loan deposits; swap agreements; FRB borrowings; and FHLBB borrowings. The Banks did not have any outstanding FRB borrowings as of March 31, 2018 and December 31, 2017.

(5) Allowance for Loan and Lease Losses

The following tables present the changes in the allowance for loan and lease losses and the recorded investment in loans and leases by portfolio segment for the periods indicated:

	Three Months Ended March 31, 2018
	Commercial Real Estate			Commercial			Consumer			Total
	(In Thousands)
Balance at December 31, 2017	$	27,112		$	26,333		$	5,147		$	58,592
Charge-offs	(3		)	(733		)	(56		)	(792		)
Recoveries	—			201			86			287
Provision (credit) for loan and lease losses	252			451			(76		)	627
Balance at March 31, 2018	$	27,361		$	26,252		$	5,101		$	58,714

	Three Months Ended March 31, 2017
	Commercial Real Estate			Commercial			Consumer			Total
	(In Thousands)
Balance at December 31, 2016	$	27,645		$	20,906		$	5,115		$	53,666
Charge-offs	(24		)	(1,207		)	(151		)	(1,382		)
Recoveries	140			142			105			387
Provision (credit) for loan and lease losses	227			13,442			(207		)	13,462
Balance at March 31, 2017	$	27,988		$	33,283		$	4,862		$	66,133

The liability for unfunded credit commitments, which is included in other liabilities, was $1.7 million at both March 31, 2018 and December 31, 2017. The changes in the liability for unfunded credit commitments reflect changes in the estimate of loss exposure associated with certain unfunded credit commitments. No credit commitments were charged off against the liability account in the three-month periods ended March 31, 2018 and 2017.

Provision for Credit Losses

The provisions for credit losses are set forth below for the periods indicated:

	Three Months Ended March 31,
	2018			2017
	(In Thousands)
Provision (credit) for loan and lease losses:
Commercial real estate	$	252		$	227
Commercial	451			13,442
Consumer	(76		)	(207		)
Total provision for loan and lease losses	627			13,462
Unfunded credit commitments	14			(60		)
Total provision for credit losses	$	641		$	13,402

21

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

Allowance for Loan and Lease Losses Methodology

Management has established a methodology to determine the adequacy of the allowance for loan and lease losses that assesses the risks and losses inherent in the loan and lease portfolio. Additions to the allowance for loan and lease losses are made by charges to the provision for credit losses. Losses on loans and leases are charged off against the allowance when all or a portion of a loan or lease is considered uncollectible. Subsequent recoveries on loans previously charged off, if any, are credited to the allowance when realized.

Management uses a consistent and systematic process and methodology to evaluate the adequacy of the allowance for loan and lease losses on a quarterly basis. For purposes of determining the allowance for loan and lease losses, the Company has segmented certain loans and leases in the portfolio by product type into the following segments: (1) commercial real estate loans, (2) commercial loans and leases, and (3) consumer loans. Portfolio segments are further disaggregated into classes based on the associated risks within the segments. Commercial real estate loans are divided into three classes: commercial real estate loans, multi-family mortgage loans, and construction loans. Commercial loans and leases are divided into three classes: commercial loans which include taxi medallion loans, equipment financing, and loans to condominium associations. Consumer loans are divided into three classes: residential mortgage loans, home equity loans, and other consumer loans. A formula-based credit evaluation approach is applied to each group, coupled with an analysis of certain loans for impairment. For each class of loan, management makes significant judgments in selecting the estimation method that fits the credit characteristics of its class and portfolio segment as set forth below.

The general allowance related to loans collectively evaluated for impairment is determined using a formula-based approach utilizing the risk ratings of individual credits and loss factors derived from historic portfolio loss rates, which include estimates of incurred losses over an estimated loss emergence period (“LEP”). The LEP was generated utilizing a charge-off look-back analysis which studied the time from the first indication of elevated risk of repayment (or other early event indicating a problem) to eventual charge-off to support the LEP considered in the allowance calculation. This reserving methodology established the approximate number of months of LEP that represents incurred losses for each portfolio. In addition to quantitative measures, relevant qualitative factors include, but are not limited to: (1) levels and trends in past due and impaired loans, (2) levels and trends in charge-offs, (3) changes in underwriting standards, policy exceptions, and credit policy, (4) experience of lending management and staff, (5) economic trends, (6) industry conditions, (7) effects of changes in credit concentrations, (8) interest rate environment, and (9) regulatory and other changes. The general allowance related to the acquired loans collectively evaluated for impairment is determined based upon the degree, if any, of deterioration in the pooled loans subsequent to acquisition. The qualitative factors used in the determination are the same as those used for originated loans.

Specific valuation allowances are established for impaired originated loans with book values greater than the discounted present value of expected future cash flows or, in the case of collateral-dependent impaired loans, for any excess of a loan's book balance over the fair value of its underlying collateral. Specific valuation allowances are established for acquired loans with deterioration in the discounted present value of expected future cash flows since acquisitions or, in the case of collateral dependent impaired loans, for any increase in the excess of a loan's book balance greater than the fair value of its underlying collateral. A specific valuation allowance for losses on troubled debt restructured ("TDR") loans is determined by comparing the net carrying amount of the troubled debt restructured loan with the restructured loan's cash flows discounted at the original effective rate. Impaired loans are reviewed quarterly with adjustments made to the calculated reserve as necessary.

As of March 31, 2018, management believes that the methodology for calculating the allowance is sound and that the allowance provides a reasonable basis for determining and reporting on probable losses incurred in the Company’s loan portfolios.

22

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

As of March 31, 2018, the Company had a portfolio of approximately $18.5 million in loans secured by taxi medallions issued by the cities of Boston and Cambridge. As of December 31, 2017, this portfolio was approximately $19.7 million. Application-based mobile ride services, such as Uber and Lyft, have generated increased competition in the transportation sector, resulting in a reduction in taxi utilization and, as a result, a reduction in the collateral value and credit quality of taxi medallion loans. This has increased the likelihood that loans secured by taxi medallions may default, or that the borrowers may be unable to repay these loans at maturity, potentially resulting in an increase in past due loans, TDRs, and charge-offs. The Company’s allowance calculation included a further segmentation of the commercial loans and leases to reflect the increased risk in the Company’s taxi medallion portfolio. This allowance calculation segmentation represents management’s estimations of the current risks associated with the portfolio.

As of March 31, 2018, the Company had an allowance for loan and lease losses associated with taxi medallion loans of $2.9 million of which $2.1 million were specific reserves and $0.8 million was a general reserve. The general reserve includes coverage for one taxi medallion relationship of $0.2 million which is treated as a commercial loan for allowance purposes due to the strength of personal guarantees supported by commercial real estate and other assets. As of December 31, 2017, the Company had an allowance for loan and lease losses associated with taxi medallion loans of $3.8 million of which $2.7 million were specific reserves and $1.1 million was a general reserve. The decrease in the allowance for loan and leases associated with taxi medallion loans was primarily driven by the decrease in specific reserves due to changes in the underlying collateral value of taxi medallions. The total TDRs secured by taxi medallions increased by $0.2 million from $3.7 million at December 31, 2017 to $3.9 million at March 31, 2018 due to one taxi medallion relationship which was restructured during the first quarter of 2018. The total loans and leases secured by taxi medallions that were placed on nonaccrual decreased to $7.6 million at March 31, 2018 from $7.8 million at December 31, 2017 due to the charge-off of three taxi medallion relationships which were placed on nonaccrual status. In addition, further declines in demand for taxi services or further deterioration in the value of taxi medallions may result in higher delinquencies and losses beyond that provided for in the allowance for loan and lease losses.

The general allowance for loan and lease losses was $56.2 million as of March 31, 2018, compared to $55.5 million as of December 31, 2017. The general allowance for loan and lease losses increased by $0.7 million during the three months endedMarch 31, 2018, as a result of the continued growth in the Company's loan portfolios.

The specific allowance for loan and lease losses was $2.5 million as of March 31, 2018, compared to $3.1 million as of December 31, 2017. The specific allowance decreased by $0.7 million during the three months endedMarch 31, 2018, primarily due to changes in the underlying collateral value of taxi medallions and charge-offs taken during the three months endedMarch 31, 2018.

Credit Quality Assessment

At the time of loan origination, a rating is assigned based on the capacity to pay and general financial strength of the borrower, the value of assets pledged as collateral, and the evaluation of third party support such as a guarantor. The Company continually monitors the quality of the loan portfolio using all available information. The officer responsible for handling each loan is required to initiate changes to risk ratings when changes in facts and circumstances occur that warrant an upgrade or downgrade in a loan rating. Based on this information, loans demonstrating certain payment issues or other weaknesses may be categorized as delinquent, impaired, nonperforming and/or put on nonaccrual status. Additionally, in the course of resolving such loans, the Company may choose to restructure the contractual terms of certain loans to match the borrower's ability to repay the loan based on their current financial condition. If a restructured loan meets certain criteria, it may be categorized as a TDR loan.

The Company reviews numerous credit quality indicators when assessing the risk in its loan portfolio. For all loans, the Company utilizes an eight-grade loan rating system, which assigns a risk rating to each borrower based on a number of quantitative and qualitative factors associated with a loan transaction. Factors considered include industry and market conditions; position within the industry; earnings trends; operating cash flow; asset/liability values; debt capacity; guarantor strength; management and controls; financial reporting; collateral; and other considerations. In addition, the Company'sindependent loan review group evaluates the credit quality and related risk ratings in all loan portfolios. The results of these reviews are reported to the Risk Committee of the Board of Directors on a periodic basis and annually to the Board of Directors. For the consumer loans, the Company heavily relies on payment status for calibrating credit risk.

23

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

The ratings categories used for assessing credit risk in the commercial real estate, multi-family mortgage, construction, commercial, equipment financing, condominium association and other consumer loan and lease classes are defined as follows:

1 -4 Rating—Pass

Loan rating grades "1" through "4" are classified as "Pass," which indicates borrowers are performing in accordance with the terms of the loan and are less likely to result in loss due to the capacity of the borrower to pay and the adequacy of the value of assets pledged as collateral.

5 Rating—Other Assets Especially Mentioned ("OAEM")

Borrowers exhibit potential credit weaknesses or downward trends deserving management's attention. If not checked or corrected, these trends will weaken the Company's asset and position. While potentially weak, currently these borrowers are marginally acceptable; no loss of principal or interest is envisioned.

6 Rating—Substandard

Borrowers exhibit well defined weaknesses that jeopardize the orderly liquidation of debt. Substandard loans may be inadequately protected by the current net worth and paying capacity of the obligors or by the collateral pledged, if any. Normal repayment from the borrower is in jeopardy. Although no loss of principal is envisioned, there is a distinct possibility that a partial loss of interest and/or principal will occur if the deficiencies are not corrected. Collateral coverage may be inadequate to cover the principal obligation.

7 Rating—Doubtful

Borrowers exhibit well-defined weaknesses that jeopardize the orderly liquidation of debt with the added provision that the weaknesses make collection of the debt in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable. Serious problems exist to the point where partial loss of principal is likely.

8 Rating—Definite Loss

Borrowers deemed incapable of repayment. Loans to such borrowers are considered uncollectible and of such little value that continuation as active assets of the Company is not warranted.

Assets rated as "OAEM," "substandard" or "doubtful" based on criteria established under banking regulations are collectively referred to as "criticized" assets.

24

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

Credit Quality Information

The following tables present the recorded investment in loans in each class as of March 31, 2018, by credit quality indicator.

	At March 31, 2018
	Commercial Real Estate		Multi- Family Mortgage		Construction		Commercial		Equipment Financing		Condominium Association		Other Consumer		Total
	(In Thousands)
Originated:
Loan rating:
Pass	$	2,118,831	$	740,015	$	135,924	$	692,888	$	878,539	$	52,739	$	29,134	$	4,648,070
OAEM	5,684		—		—		13,762		1,833		—		—		21,279
Substandard	4,394		588		860		19,271		5,357		—		53		30,523
Doubtful	201		—		—		931		2,765		—		—		3,897
Total originated	2,129,110		740,603		136,784		726,852		888,494		52,739		29,187		4,703,769
Acquired:
Loan rating:
Pass	136,685		52,706		31,856		33,452		3,836		—		140		258,675
OAEM	1,930		—		—		275		—		—		1		2,206
Substandard	10,303		281		—		1,343		11		—		—		11,938
Doubtful	—		—		—		—		—		—		—		—
Total acquired	148,918		52,987		31,856		35,070		3,847		—		141		272,819
Total loans	$	2,278,028	$	793,590	$	168,640	$	761,922	$	892,341	$	52,739	$	29,328	$	4,976,588

As of March 31, 2018, there were no loans categorized as definite loss.

25

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

	At March 31, 2018
	Residential Mortgage				Home Equity
	(Dollars In Thousands)
Originated:
Loan-to-value ratio:
Less than 50%	$	155,121	20.1	%	$	144,513	39.6	%
50% - 69%	270,273		35.0	%	75,826		20.8	%
70% - 79%	166,304		21.5	%	66,491		18.2	%
80% and over	19,988		2.6	%	28,212		7.7	%
Data not available*	1,684		0.2	%	43		—	%
Total originated	613,370		79.4	%	315,085		86.3	%
Acquired:
Loan-to-value ratio:
Less than 50%	32,140		4.0	%	29,519		8.3	%
50%—69%	45,905		5.9	%	13,150		3.5	%
70%—79%	40,067		5.2	%	985		0.3	%
80% and over	29,930		3.9	%	886		0.2	%
Data not available*	11,591		1.6	%	5,245		1.4	%
Total acquired	159,633		20.6	%	49,785		13.7	%
Total loans	$	773,003	100.0	%	$	364,870	100.0	%

_______________________________________________________________________________

* Represents in process general ledger accounts for which data are not available.

26

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

The following tables present the recorded investment in loans in each class as of December 31, 2017, by credit quality indicator.

	At December 31, 2017
	Commercial Real Estate		Multi- Family Mortgage		Construction		Commercial		Equipment Financing		Condominium Association		Other Consumer		Total
	(In Thousands)
Originated:
Loan rating:
Pass	$	2,054,376	$	735,313	$	139,278	$	670,265	$	850,006	$	52,619	$	14,628	$	4,516,485
OAEM	8,889		—		—		7,691		3,630		—		—		20,210
Substandard	5,926		608		860		17,681		5,012		—		39		30,126
Doubtful	201		—		—		1,188		3,326		—		—		4,715
Total originated	2,069,392		735,921		140,138		696,825		861,974		52,619		14,667		4,571,536
Acquired:
Loan rating:
Pass	94,244		24,459		—		6,643		4,501		—		104		129,951
OAEM	9,839		—		—		265		—		—		1		10,105
Substandard	1,494		290		—		1,271		13		—		—		3,068
Doubtful	—		—		—		—		—		—		—		—
Total acquired	105,577		24,749		—		8,179		4,514		—		105		143,124
Total loans	$	2,174,969	$	760,670	$	140,138	$	705,004	$	866,488	$	52,619	$	14,772	$	4,714,660

As of December 31, 2017, there were no loans categorized as definite loss.

27

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

	At December 31, 2017
	Residential Mortgage				Home Equity
	(Dollars In Thousands)
Originated:
Loan-to-value ratio:
Less than 50%	$	153,373	23.2	%	$	148,137	41.6	%
50%—69%	265,328		40.2	%	75,099		21.1	%
70%—79%	168,272		25.5	%	63,742		17.9	%
80% and over	16,547		2.5	%	27,122		7.6	%
Data not available*	1,377		0.2	%	89		—	%
Total originated	604,897		91.6	%	314,189		88.2	%
Acquired:
Loan-to-value ratio:
Less than 50%	16,521		2.5	%	25,312		7.1	%
50%—69%	19,182		2.9	%	13,883		3.9	%
70%—79%	10,507		1.6	%	943		0.3	%
80% and over	7,893		1.2	%	582		0.2	%
Data not available*	1,065		0.2	%	1,045		0.3	%
Total acquired	55,168		8.4	%	41,765		11.8	%
Total loans	$	660,065	100.0	%	$	355,954	100.0	%

_______________________________________________________________________________

* Represents in process general ledger accounts for which data are not available.

The following table presents information regarding foreclosed residential real estate property for the periods indicated:

	At March 31, 2018	At December 31, 2017
	(In Thousands)
Recorded investment in mortgage loans collateralized by residential real estate property that are in the process of foreclosure	—	633

There were no foreclosed residential real estate property held by the creditor at March 31, 2018 or December 31, 2017.

28

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

Age Analysis of Past Due Loans and Leases

The following tables present an age analysis of the recorded investment in total loans and leases as of March 31, 2018 and December 31, 2017.

	At March 31, 2018
	Past Due												Loans and Leases Past Due Greater Than 90 Days and Accruing
	31-60 Days		61-90 Days		Greater Than 90 Days		Total		Current		Total Loans and Leases				Nonaccrual Loans and Leases
	(In Thousands)
Originated:
Commercial real estate loans:
Commercial real estate	$	8,466	$	633	$	2,645	$	11,744	$	2,117,366	$	2,129,110	$	—	$	3,954
Multi-family mortgage	1,032		—		—		1,032		739,571		740,603		—		588
Construction	297		—		860		1,157		135,627		136,784		—		860
Total commercial real estate loans	9,795		633		3,505		13,933		2,992,564		3,006,497		—		5,402
Commercial loans and leases:
Commercial	1,453		1,642		6,133		9,228		717,624		726,852		—		9,927
Equipment financing	4,207		778		4,241		9,226		879,268		888,494		—		6,661
Condominium association	855		161		—		1,016		51,723		52,739		—		—
Total commercial loans and leases	6,515		2,581		10,374		19,470		1,648,615		1,668,085		—		16,588
Consumer loans:
Residential mortgage	1,553		—		580		2,133		611,237		613,370		—		1,962
Home equity	285		1		51		337		314,748		315,085		1		130
Other consumer	113		13		34		160		29,027		29,187		—		53
Total consumer loans	1,951		14		665		2,630		955,012		957,642		1		2,145
Total originated loans and leases	$	18,261	$	3,228	$	14,544	$	36,033	$	5,596,191	$	5,632,224	$	1	$	24,135

29

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

	At March 31, 2018
	Past Due												Loans and Leases Past Due Greater Than 90 Days and Accruing
	31-60 Days		61-90 Days		Greater Than 90 Days		Total		Current		Total Loans and Leases				Nonaccrual Loans and Leases
	(In Thousands)
Acquired:
Commercial real estate loans:
Commercial real estate	$	8,680	$	55	$	1,604	$	10,339	$	138,579	$	148,918	$	1,534	$	126
Multi-family mortgage	—		—		—		—		52,987		52,987		—		—
Construction	—		—		—		—		31,856		31,856		—		—
Total commercial real estate loans	8,680		55		1,604		10,339		223,422		233,761		1,534		126
Commercial loans and leases:
Commercial	93		38		836		967		34,103		35,070		1		1,223
Equipment financing	—		—		11		11		3,836		3,847		5		—
Total commercial loans and leases	93		38		847		978		37,939		38,917		6		1,223
Consumer loans:
Residential mortgage	431		767		2,201		3,399		156,234		159,633		2,201		—
Home equity	260		88		265		613		49,172		49,785		140		795
Other consumer	—		—		—		—		141		141		—		—
Total consumer loans	691		855		2,466		4,012		205,547		209,559		2,341		795
Total acquired loans and leases	$	9,464	$	948	$	4,917	$	15,329	$	466,908	$	482,237	$	3,881	$	2,144
Total loans and leases	$	27,725	$	4,176	$	19,461	$	51,362	$	6,063,099	$	6,114,461	$	3,882	$	26,279

30

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

	At December 31, 2017
	Past Due												Loans and Leases Past Due Greater Than 90 Days and Accruing
	31-60 Days		61-90 Days		Greater Than 90 Days		Total		Current		Total Loans and Leases				Nonaccrual Loans and Leases
	(In Thousands)
Originated:
Commercial real estate loans:
Commercial real estate	$	3,294	$	391	$	1,843	$	5,528	$	2,063,864	$	2,069,392	$	—	$	3,182
Multi-family mortgage	6,141		2,590		—		8,731		727,190		735,921		—		608
Construction	6,537		330		860		7,727		132,411		140,138		—		860
Total commercial real estate loans	15,972		3,311		2,703		21,986		2,923,465		2,945,451		—		4,650
Commercial loans and leases:
Commercial	1,344		597		7,724		9,665		687,160		696,825		—		10,365
Equipment financing	3,214		2,494		3,203		8,911		853,063		861,974		224		8,106
Condominium association	857		262		—		1,119		51,500		52,619		—		—
Total commercial loans and leases	5,415		3,353		10,927		19,695		1,591,723		1,611,418		224		18,471
Consumer loans:
Residential mortgage	1,256		166		728		2,150		602,747		604,897		—		1,979
Home equity	643		19		32		694		313,495		314,189		1		132
Other consumer	238		20		28		286		14,381		14,667		—		43
Total consumer loans	2,137		205		788		3,130		930,623		933,753		1		2,154
Total originated loans and leases	$	23,524	$	6,869	$	14,418	$	44,811	$	5,445,811	$	5,490,622	$	225	$	25,275

31

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

	At December 31, 2017
	Past Due												Loans and Leases Past Due Greater Than 90 Days and Accruing
	31-60 Days		61-90 Days		Greater Than 90 Days		Total		Current		Total Loans and Leases				Nonaccrual Loans and Leases
	(In Thousands)
Acquired:
Commercial real estate loans:
Commercial real estate	$	1,008	$	—	$	656	$	1,664	$	103,913	$	105,577	$	586	$	131
Multi-family mortgage	—		—		3		3		24,746		24,749		3		—
Construction	—		—		—		—		—		—		—		—
Total commercial real estate loans	1,008		—		659		1,667		128,659		130,326		589		131
Commercial loans and leases:
Commercial	—		44		1,022		1,066		7,113		8,179		17		1,254
Equipment financing	—		—		13		13		4,501		4,514		13		—
Total commercial loans and leases	—		44		1,035		1,079		11,614		12,693		30		1,254
Consumer loans:
Residential mortgage	—		463		1,990		2,453		52,715		55,168		1,990		—
Home equity	508		—		186		694		41,071		41,765		186		612
Other consumer	—		—		—		—		105		105		—		—
Total consumer loans	508		463		2,176		3,147		93,891		97,038		2,176		612
Total acquired loans and leases	$	1,516	$	507	$	3,870	$	5,893	$	234,164	$	240,057	$	2,795	$	1,997
Total loans and leases	$	25,040	$	7,376	$	18,288	$	50,704	$	5,679,975	$	5,730,679	$	3,020	$	27,272

32

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

Commercial Real Estate Loans—As of March 31, 2018, loans outstanding in the three classes within this segment expressed as a percentage of total loans and leases outstanding were as follows: commercial real estate loans -- 37.1%; multi-family mortgage loans -- 13.0%; and construction loans -- 2.8%.

Loans in this portfolio that are on nonaccrual status and/or risk-rated "substandard" or worse are evaluated on an individual loan basis for impairment. For non-impaired commercial real estate loans, loss factors are applied to outstanding loans by risk rating for each of the three classes in the portfolio. The factors applied are based primarily on historic loan loss experience and an assessment of internal and external factors and other relevant information.

Commercial Loans and Leases—As of March 31, 2018, loans and leases outstanding in the three classes within this segment expressed as a percent of total loans and leases outstanding were as follows: commercial loans and leases -- 12.5%; equipment financing loans -- 14.6%; and loans to condominium associations -- 0.9%.

Loans and leases in this portfolio that are on nonaccrual status and/or risk-rated "substandard" or worse are evaluated on an individual basis for impairment. For non-impaired commercial loans and leases, loss factors are applied to outstanding loans by risk rating for each of the three classes in the portfolio.

Consumer Loans—As of March 31, 2018, loans outstanding within the three classes within this segment expressed as a percent of total loans and leases outstanding were as follows: residential mortgage loans -- 12.6%, home equity loans -- 6.0%, and other consumer loans -- 0.5%.

Significant risk characteristics related to the residential mortgage and home equity loan portfolios are the geographic concentration of the properties financed within selected communities in the greater Boston and Providence metropolitan areas. The payment status and loan-to-value ratio are the primary credit quality indicators used for residential mortgage loans and home equity loans. Generally, loans are not made when the loan-to-value ratio exceeds 80% unless private mortgage insurance is obtained and/or there is a financially strong guarantor. Consumer loans that become 90 days or more past due, or are placed on nonaccrual.

Impaired Loans and Leases

A loan is considered to be impaired when, based on current information and events, it is probable that the Company will be unable to collect all amounts due (both interest and principal) according to the contractual terms of the loan agreement. The Company has defined the population of impaired loans to include nonaccrual loans and troubled debt restructured ("TDR") loans.

When the ultimate collectability of the total principal of an impaired loan or lease is in doubt and the loan is on nonaccrual status, all payments are applied to principal, under the cost recovery method. When the ultimate collectability of the total principal of an impaired loan or lease is not in doubt and the loan or lease is on nonaccrual status, contractual interest is credited to interest income when received, under the cash basis method.

The following tables include the recorded investment and unpaid principal balances of impaired loans and leases with the related allowance amount, if applicable, for the originated and acquired loan and lease portfolios at the dates indicated. Also presented are the average recorded investments in the impaired loans and leases and the related amount of interest recognized during the period that the impaired loans were impaired.

33

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

	At March 31, 2018						At December 31, 2017
	Recorded Investment (1)		Unpaid Principal Balance		Related Allowance		Recorded Investment (2)		Unpaid Principal Balance		Related Allowance
	(In Thousands)
Originated:
With no related allowance recorded:
Commercial real estate	$	7,962	$	7,946	$	—	$	9,978	$	9,962	$	—
Commercial	27,032		27,027		—		24,906		25,040		—
Consumer	3,338		3,330		—		3,508		3,500		—
Total originated with no related allowance recorded	38,332		38,303		—		38,392		38,502		—
With an allowance recorded:
Commercial real estate	—		—		—		3,056		3,056		—
Commercial	7,953		7,942		2,509		8,912		8,862		3,105
Consumer	134		134		18		—		—		—
Total originated with an allowance recorded	8,087		8,076		2,527		11,968		11,918		3,105
Total originated impaired loans and leases	46,419		46,379		2,527		50,360		50,420		3,105
Acquired:
With no related allowance recorded:
Commercial real estate	10,676		10,676		—		1,880		1,880		—
Commercial	1,607		1,607		—		1,594		1,594		—
Consumer	4,839		4,839		—		4,736		4,736		—
Total acquired with no related allowance recorded	17,122		17,122		—		8,210		8,210		—
With an allowance recorded:
Consumer	114		114		22		115		115		22
Total acquired with an allowance recorded	114		114		22		115		115		22
Total acquired impaired loans and leases	17,236		17,236		22		8,325		8,325		22
Total impaired loans and leases	$	63,655	$	63,615	$	2,549	$	58,685	$	58,745	$	3,127

___________________________________________________________________________

(1) Includes originated and acquired nonaccrual loans of $23.8 million and $2.1 million, respectively as of March 31, 2018.

(2) Includes originated and acquired nonaccrual loans of $24.9 million and $2.0 million, respectively as of December 31, 2017.

34

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

	Three Months Ended
	March 31, 2018				March 31, 2017
	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
	(In Thousands)
Originated:
With no related allowance recorded:
Commercial real estate	$	7,985	$	30	$	9,363	$	32
Commercial	27,761		272		21,058		164
Consumer	3,353		13		5,306		16
Total originated with no related allowance recorded	39,099		315		35,727		212
With an allowance recorded:
Commercial real estate	—		—		4,000		48
Commercial	7,993		16		22,322		1
Consumer	134		1		—		—
Total originated with an allowance recorded	8,127		17		26,322		49
Total originated impaired loans and leases	47,226		332		62,049		261
Acquired:
With no related allowance recorded:
Commercial real estate	10,681		1		9,419		19
Commercial	1,624		4		2,934		10
Consumer	4,860		15		6,133		16
Total acquired with no related allowance recorded	17,165		20		18,486		45
With an allowance recorded:
Commercial real estate	—		—		—		—
Commercial	—		—		—		—
Consumer	114		1		168		1
Total acquired with an allowance recorded	114		1		168		1
Total acquired impaired loans and leases	17,279		21		18,654		46
Total impaired loans and leases	$	64,505	$	353	$	80,703	$	307

35

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

The following tables present information regarding impaired and non-impaired loans and leases at the dates indicated:

	At March 31, 2018
	Commercial Real Estate		Commercial		Consumer		Total
	(In Thousands)
Allowance for Loan and Lease Losses:
Originated:
Individually evaluated for impairment	$	—	$	2,509	$	18	$	2,527
Collectively evaluated for impairment	26,674		23,613		4,990		55,277
Total originated loans and leases	26,674		26,122		5,008		57,804
Acquired:
Individually evaluated for impairment	—		—		22		22
Collectively evaluated for impairment	104		12		15		131
Acquired with deteriorated credit quality	583		118		56		757
Total acquired loans and leases	687		130		93		910
Total allowance for loan and lease losses	$	27,361	$	26,252	$	5,101	$	58,714
Loans and Leases:
Originated:
Individually evaluated for impairment	$	7,959	$	30,561	$	3,406	$	41,926
Collectively evaluated for impairment	2,998,538		1,637,524		954,236		5,590,298
Total originated loans and leases	3,006,497		1,668,085		957,642		5,632,224
Acquired:
Individually evaluated for impairment	—		1,447		1,964		3,411
Collectively evaluated for impairment	139,761		33,145		169,453		342,359
Acquired with deteriorated credit quality	94,000		4,325		38,142		136,467
Total acquired loans and leases	233,761		38,917		209,559		482,237
Total loans and leases	$	3,240,258	$	1,707,002	$	1,167,201	$	6,114,461

36

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

	At December 31, 2017
	Commercial Real Estate		Commercial		Consumer		Total
	(In Thousands)
Allowance for Loan and Lease Losses:
Originated:
Individually evaluated for impairment	$	—	$	3,105	$	—	$	3,105
Collectively evaluated for impairment	26,366		23,078		5,003		54,447
Total originated loans and leases	26,366		26,183		5,003		57,552
Acquired:
Individually evaluated for impairment	—		—		22		22
Collectively evaluated for impairment	145		13		17		175
Acquired with deteriorated credit quality	601		137		105		843
Total acquired loans and leases	746		150		144		1,040
Total allowance for loan and lease losses	$	27,112	$	26,333	$	5,147	$	58,592
Loans and Leases:
Originated:
Individually evaluated for impairment	$	13,031	$	29,386	$	3,070	$	45,487
Collectively evaluated for impairment	2,932,420		1,582,032		930,683		5,445,135
Total originated loans and leases	2,945,451		1,611,418		933,753		5,490,622
Acquired:
Individually evaluated for impairment	—		1,487		1,867		3,354
Collectively evaluated for impairment	34,244		6,399		55,921		96,564
Acquired with deteriorated credit quality	96,082		4,807		39,250		140,139
Total acquired loans and leases	130,326		12,693		97,038		240,057
Total loans and leases	$	3,075,777	$	1,624,111	$	1,030,791	$	5,730,679

37

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

Troubled Debt Restructured Loans and Leases

A specific valuation allowance for losses on TDR loans is determined by comparing the net carrying amount of the TDR loan with the restructured loan's cash flows discounted at the original effective rate.

The following table sets forth information regarding TDR loans and leases at the dates indicated:

	At March 31, 2018		At December 31, 2017
	(In Thousands)
Troubled debt restructurings:
On accrual	$	14,294	$	16,241
On nonaccrual	8,610		9,770
Total troubled debt restructurings	$	22,904	$	26,011

Total TDR loans and leases decreased by $3.1 million to $22.9 million at March 31, 2018 from

$26.0 million at December 31, 2017, primarily driven by the payoff of a commercial real estate relationship.

The recorded investment in TDR loans and the associated specific allowances for loan and lease losses, in the originated and acquired loan and lease portfolios, that were modified during the periods indicated, are as follows.

	At and for the Three Months Ended March 31, 2018
		Recorded Investment				Specific Allowance for Loan and Lease Losses						Defaulted (1)
	Number of Loans/ Leases	At Modification		At End of Period				Nonaccrual Loans and Leases		Additional Commitment		Number of Loans/ Leases	Recorded Investment
	(Dollars in Thousands)
Originated:
Commercial	6	$	635	$	635	$	41	$	635	$	—	1	$	929
Equipment financing	6	1,555		1,555		—		—		—		—	—
Total originated	12	$	2,190	$	2,190	$	41	$	635	$	—	1	$	929

______________________________________________________________________

(1) Includes loans and leases that have been modified within the past twelve months and subsequently had payment defaults during the period indicated.

There were no acquired loans and leases that met the definition of a TDR during the three months ended March 31, 2018.

	At and for the Three Months Ended March 31, 2017
		Recorded Investment				Specific Allowance for Loan and Lease Losses						Defaulted (1)
	Number of Loans/ Leases	At Modification		At End of Period				Nonaccrual Loans and Leases		Additional Commitment		Number of Loans/ Leases	Recorded Investment
	(Dollars in Thousands)
Originated:
Commercial	3	$	765	$	765	$	364	$	741	$	—	3	$	800
Total originated	3	$	765	$	765	$	364	$	741	—		3	$	800

______________________________________________________________________

(1) Includes loans and leases that have been modified within the past twelve months and subsequently had payment defaults during the period indicated.

There were no acquired loans and leases that met the definition of a TDR during the three months ended March 31, 2017.

38

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

The following table sets forth the Company's end-of-period balances for TDRs that were modified during the periods indicated, by type of modification.

	Three Months Ended March 31,
	2018		2017
	(In Thousands)
Loans with one modification:
Adjusted principal	$	—	$	375
Combination maturity, principal, interest rate	2,190		390
Total loans with one modification	$	2,190	$	765

The TDR loans and leases that were modified for the three months endedMarch 31, 2018 and 2017 were $2.2 million and $0.8 million, respectively. The increase in TDR loans and leases that were modified for the three months endedMarch 31, 2018 was primarily due to the modification of loans and leases secured by taxi medallions and one equipment financing relationship.

There were no TDR loans and leases with more than one modification during the three months endedMarch 31, 2018 and 2017.

The net charge-offs of the performing and nonperforming TDR loans and leases for the three months endedMarch 31, 2018 were $103 thousand driven by the charge-off of two commercial loans secured by taxi medallions. The net recoveries for performing and nonperforming TDR loans and leases for the three months endedMarch 31, 2017 were $7 thousand.

As of March 31, 2018 and 2017, there were no commitments to lend funds to debtors owing receivables whose terms had been modified in TDRs.

(6) Goodwill and Other Intangible Assets

The following table sets forth the carrying value of goodwill and other intangible assets at the dates indicated:

	At March 31, 2018		At December 31, 2017
	(In Thousands)
Goodwill	$	137,890	$	137,890
Additions	23,006		—
Balance at end of period	160,896		137,890
Other intangible assets:
Core deposits	6,608		4,955
Trade name	1,089		1,089
Total other intangible assets	7,697		6,044
Total goodwill and other intangible assets	$	168,593	$	143,934

The addition of goodwill and the increase in core deposit intangibles, at March 31, 2018 are due to the excess of the purchase paid over the fair value of the net assets acquired from the First Commons Bank acquisition.

At December 31, 2013, the Company concluded that the BankRI name would continue to be utilized in its marketing strategies; therefore, the trade name with carrying value of $1.1 million, has an indefinite life and ceased to amortize.

The weighted-average amortization period for the CDI is 8.5 years.

39

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

The estimated aggregate future amortization expense (in thousands) for other intangible assets for each of the next five years and thereafter is as follows:

Remainder of 2018	$	1,691
Year ending:
2019	1,682
2020	1,247
2021	839
2022	486
2023	256
Thereafter	407
Total	$	6,608

(7) Accumulated Other Comprehensive Income (Loss)

For the three months endedMarch 31, 2018 and 2017, the Company’s accumulated other comprehensive income (loss) includes the following two components: (i) unrealized holding gains (losses) on investment securities available-for-sale; and (ii) adjustment of accumulated obligation for postretirement benefits.

Changes in accumulated other comprehensive income (loss) by component, net of tax, were as follows for the periods indicated:

	Three Months Ended March 31, 2018
	Investment Securities Available-for-Sale			Postretirement Benefits		Accumulated Other Comprehensive Loss
	(In Thousands)
Balance at December 31, 2017	$	(6,113	)	$	163	$	(5,950	)
Other comprehensive income	(5,716		)	—		(5,716		)
Balance at March 31, 2018	$	(11,829	)	$	163	$	(11,666	)

	Three Months Ended March 31, 2017
	Investment Securities Available-for-Sale			Postretirement Benefits		Accumulated Other Comprehensive Loss
	(In Thousands)
Balance at December 31, 2016	$	(4,213	)	$	395	$	(3,818	)
Other comprehensive income	557			—		557
Balance at March 31, 2017	$	(3,656	)	$	395	$	(3,261	)

The Company did not reclassify any amounts out of accumulated other comprehensive income (loss) for the three months endedMarch 31, 2018 and 2017.

(8) Derivatives and Hedging Activities

The Company utilizes loan level derivatives which consist of interest-rate contracts (swaps, caps and floors), and risk participation agreements as part of the Company's interest-rate risk management strategy for certain assets and liabilities and not for speculative purposes. Based on the Company's intended use for the loan level derivatives at inception, the Company designates the derivative as either an economic hedge of an asset or liability, or a hedging instrument subject to the hedge accounting provisions of FASB ASC Topic 815, "Derivatives and Hedging".

Interest-rate swap, cap and floor agreements are entered into as hedges against future interest-rate fluctuations on specifically identified assets or liabilities. The Company did not have derivative fair value hedges or derivative cash flow hedges as of March 31, 2018 or December 31, 2017.

40

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

Derivatives not designated as hedges are not speculative but rather result from a service the Company provides to certain customers for a fee. The Company executes loan level derivative products such as interest-rate swap agreements with commercial banking customers to aid them in managing their interest-rate risk. The interest-rate swap contracts allow the commercial banking customers to convert floating-rate loan payments to fixed-rate loan payments. The Company concurrently enters into offsetting swaps with a third party financial institution, effectively minimizing its net risk exposure resulting from such transactions. The third-party financial institution exchanges the customer's fixed-rate loan payments for floating-rate loan payments. As the interest-rate swap agreements associated with this program do not meet hedge accounting requirements, changes in the fair value are recognized directly in earnings.

The Company utilizes risk participation agreements with other banks participating in commercial loan arrangements. Participating banks guarantee the performance on borrower-related interest rate swap contracts. Risk participation agreements are derivative financial instruments and are recorded at fair value. These derivatives are not designated as hedges and therefore, changes in fair value are recorded directly through earnings at each reporting period.

Under a risk participation-out agreement, a derivative asset, the Company participates out a portion of the credit risk associated with the interest rate swap position executed with the commercial borrower, for a fee paid to the participating bank. Under a risk participation-in agreement, a derivative liability, the Company assumes, or participates in, a portion of the credit risk associated with the interest rate swap position with the commercial borrower, for a fee received from the other bank.

The Company offers foreign exchange contracts to commercial borrowers to accommodate their business needs. These foreign exchange contracts do not qualify as hedges for accounting purposes. To mitigate the market and liquidity risk associated with these foreign exchange contracts, the Company enters into similar offsetting positions.

Asset derivatives and liability derivatives are included in other assets and accrued expenses and other liabilities on the unaudited consolidated balance sheets.

The following tables presents the Company's customer related derivative positions for the periods indicated below for those derivatives not designated as hedging.

	Notional Amount Maturing
	Number of Positions	Less than 1 year		Less than 2 years		Less than 3 years		Less than 4 years		Thereafter		Total		Fair Value
	March 31, 2018
	(Dollars In Thousands)
Loan level derivatives
Receive fixed, pay variable	66	$	3,872	$	2,010	$	27,607	$	—	$	504,205	$	537,694	$	13,594
Pay fixed, receive variable	66	3,872		2,010		27,607		—		504,205		537,694		13,594
Risk participation-out agreements	8	—		—		8,495		—		28,667		37,162		43
Risk participation-in agreements	1	—		—		—		—		3,825		3,825		7
Foreign exchange contracts
Buys foreign currency, sells U.S. currency	18	$	1,330	$	—	$	—	$	—	$	—	$	1,330	$	65
Sells foreign currency, buys U.S. currency	36	1,335		—		—		—		—		1,335		60

41

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

	Notional Amount Maturing
	Number of Positions	Less than 1 year		Less than 2 years		Less than 3 years		Less than 4 years		Thereafter		Total		Fair Value
	December 31, 2017
	(Dollars In Thousands)
Loan level derivatives
Receive fixed, pay variable	66	$	3,903	$	2,036	$	27,992	$	—	$	460,728	$	494,659	$	8,865
Pay fixed, receive variable	66	3,903		2,036		27,992		—		460,728		494,659		8,865
Risk participation-out agreements	8	—		—		8,613		—		28,014		36,627		65
Risk participation-in agreements	1	—		—		—		—		3,825		3,825		10
Foreign exchange contracts
Buys foreign currency, sells U.S. currency	22	$	1,495	$	—	$	—	$	—	$	—	$	1,495	$	65
Sells foreign currency, buys U.S. currency	44	1,502		—		—		—		—		1,502		72

Certain derivative agreements contain provisions that require the Company to post collateral if the derivative exposure exceeds a threshold amount. The Company posted collateral to dealer counterparties of $25.5 million and $26.7 million in the normal course of business as of March 31, 2018 and December 31, 2017, respectively. Dealer counterparties posted $0.5 million to the Company in the normal course of business as of March 31, 2018 compared to no collateral as of December 31, 2017.

The tables below present the offsetting of derivatives and amounts subject to master netting agreements not offset in the unaudited consolidated balance sheet at the dates indicated.

	At March 31, 2018
	Gross Amounts Recognized		Gross Amounts Offset in the Statement of Financial Position		Net Amounts  Presented in the Statement of Financial Position		Gross Amounts Not Offset in the Statement of Financial Position				Net Amount
							Financial Instruments Pledged		Cash Collateral Pledged
	(In Thousands)
Asset derivatives
Loan level derivatives	$	13,594	$	—	$	13,594	$	—	$	530	$	13,064
Risk participation-out agreements	43		—		43		—		—		43
Foreign exchange contracts	65		—		65		—		—		65
Total	$	13,702	$	—	$	13,702	$	—	$	530	$	13,172
Liability derivatives
Loan level derivatives	$	13,594	$	—	$	13,594	$	24,017	$	1,510	$	—
Risk participation-in agreements	7		—		7		—		—		7
Foreign exchange contracts	60		—		60		—		—		60
Total	$	13,661	$	—	$	13,661	$	24,017	$	1,510	$	67

42

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

	At December 31, 2017
	Gross Amounts Recognized		Gross Amounts Offset in the Statement of Financial Position		Net Amounts  Presented in the Statement of Financial Position		Gross Amounts Not Offset in the Statement of Financial Position				Net Amount
							Financial Instruments Pledged		Cash Collateral Pledged
	(In Thousands)
Asset derivatives
Loan level derivatives	$	8,865	$	—	$	8,865	$	—	$	—	$	8,865
Risk participation-out agreements	65		—		65		—		—		65
Foreign exchange contracts	72		—		72		—		—		72
Total	$	9,002	$	—	$	9,002	$	—	$	—	$	9,002
Liability derivatives
Loan level derivatives	$	8,865	$	—	$	8,865	$	25,159	$	1,510	$	—
Risk participation-in agreements	10		—		10		—		—		—
Foreign exchange contracts	65		—		65		—		—		—
Total	$	8,940	$	—	$	8,940	$	25,159	$	1,510	$	—

The Company has agreements with certain of its derivative counterparties that contain credit-risk-related contingent provisions. These provisions provide the counterparty with the right to terminate its derivative positions and require the Company to settle its obligations under the agreements if the Company defaults on certain of its indebtedness or if the Company fails to maintain its status as a well-capitalized institution.

(9) Stock Based Compensation

As of March 31, 2018, the Company had three active recognition and retention plans: the 2003 Recognition and Retention Plan (the "2003 RRP") with 1,250,000 authorized shares, the 2011 Restricted Stock Award Plan ("2011 RSA") with 500,000 authorized shares and the 2014 Equity Incentive Plan ("2014 Plan") with 1,750,000 authorized shares. The 2003 RRP, the 2011 RSA and the 2014 Plan are collectively referred to as the "Plans". The purpose of the Plans is to promote the long-term financial success of the Company and its subsidiaries by providing a means to attract, retain and reward individuals who contribute to such success and to further align their interests with those of the Company's stockholders.

Of the awarded shares, generally 50% vest ratably over three years with one-third of such shares vesting at each of the first, second and third anniversary dates of the awards. These are referred to as "time-based shares". The remaining 50% of each award has a cliff vesting schedule and will vest three years after the award date based on the level of the Company's achievement of identified performance targets in comparison to the level of achievement of such identified performance targets by a defined peer group comprised of 17 financial institutions. These are referred to as "performance-based shares". If a participant leaves the Company prior to the third anniversary date of an award, any unvested shares are forfeited. Dividends declared with respect to shares awarded will be held by the Company and paid to the participant only when the shares vest.

Under all the Plans, shares of the Company's common stock were reserved for issuance as restricted stock awards to officers, employees, and non-employee directors of the Company. Shares issued upon vesting may be either authorized but unissued shares or reacquired shares held by the Company as treasury shares. Any shares not issued because vesting requirements are not met will be retired back to treasury and be made available again for issuance under the Plans.

During the three months endedMarch 31, 2018, and 2017, no shares were issued upon satisfaction of required conditions of the Plans.

Total expense for the Plans was $0.7 million and $0.6 million for the three months ended March 31, 2018 and 2017, respectively.

43

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

(10) Earnings per Share ("EPS")

The following table is a reconciliation of basic EPS and diluted EPS:

	Three Months Ended
	March 31, 2018				March 31, 2017
	Basic		Fully Diluted		Basic		Fully Diluted
	(Dollars in Thousands, Except Per Share Amounts)
Numerator:
Net income	$	18,633	$	18,633	$	13,445	$	13,445
Denominator:
Weighted average shares outstanding	77,879,593		77,879,593		70,386,766		70,386,766
Effect of dilutive securities	—		288,207		—		457,330
Adjusted weighted average shares outstanding	77,879,593		78,167,800		70,386,766		70,844,096
EPS	$	0.24	$	0.24	$	0.19	$	0.19

(11) Fair Value of Financial Instruments

A description of the valuation methodologies used for assets and liabilities measured at fair value on a recurring and non-recurring basis, as well as the general classification of such instruments pursuant to the valuation hierarchy, is set forth below. There were no changes in the valuation techniques used during the three months endedMarch 31, 2018 and 2017.

44

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

Assets and Liabilities Recorded at Fair Value on a Recurring Basis

The following tables set forth the carrying value of assets and liabilities measured at fair value on a recurring basis at the dates indicated:

	Carrying Value as of March 31, 2018
	Level 1		Level 2		Level 3		Total
	(In Thousands)
Assets:
Investment securities available-for-sale:
GSE debentures	$	—	$	180,968	$	—	$	180,968
GSE CMOs	—		119,697		—		119,697
GSE MBSs	—		192,185		—		192,185
SBA commercial loan asset-backed securities	—		69		—		69
Corporate debt obligations	—		55,872		—		55,872
U.S. Treasury bonds	—		8,597		—		8,597
Trust preferred securities	—		—		—		—
Marketable equity securities	969		—		—		969
Total investment securities available-for-sale	$	969	$	557,388	$	—	$	558,357
Loan level derivatives	$	—	$	13,594	$	—	$	13,594
Risk participation-out agreements	—		43		—		43
Foreign exchange contracts	—		65		—		65
Liabilities:
Loan level derivatives	$	—	$	13,594	$	—	$	13,594
Risk participation-in agreements	—		7		—		7
Foreign exchange contracts	—		60		—		60

45

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

	Carrying Value as of December 31, 2017
	Level 1		Level 2		Level 3		Total
	(In Thousands)
Assets:
Investment securities available-for-sale:
GSE debentures	$	—	$	149,924	$	—	$	149,924
GSE CMOs	—		127,022		—		127,022
GSE MBSs	—		189,313		—		189,313
SBA commercial loan asset-backed securities	—		72		—		72
Corporate debt obligations	—		62,683		—		62,683
U.S. Treasury bonds	—		8,730		—		8,730
Trust preferred securities	—		1,398		—		1,398
Marketable equity securities	982		—		—		982
Total investment securities available-for-sale	$	982	$	539,142	$	—	$	540,124
Loan level derivatives	$	—	$	8,865	$	—	$	8,865
Risk participation-out agreements	—		65		—		65
Foreign exchange contracts	—		72		—		72
Liabilities:
Loan level derivatives	$	—	$	8,865	$	—	$	8,865
Risk participation-in agreements	—		10		—		10
Foreign exchange contracts	—		65		—		65

Investment Securities Available-for-Sale

The fair value of investment securities is based principally on market prices and dealer quotes received from third-party and nationally-recognized pricing services for identical investment securities such as U.S. Treasury and agency securities. The Company's marketable equity securities are priced this way and are included in Level 1. These prices are validated by comparing the primary pricing source with an alternative pricing source when available. When quoted market prices for identical securities are unavailable, the Company uses market prices provided by independent pricing services based on recent trading activity and other observable information, including but not limited to market interest-rate curves, referenced credit spreads and estimated prepayment speeds where applicable. These investments include GSE debentures, GSE mortgage-related securities, SBA commercial loan asset backed securities, corporate debt securities, and trust preferred securities, all of which are included in Level 2. As of March 31, 2018 and December 31, 2017, no investment securities were valued using pricing models included in Level 3.

Additionally, management reviews changes in fair value from period to period and performs testing to ensure that prices received from the third parties are consistent with management's expectation of the market. Changes in the prices obtained from the pricing service are analyzed from month to month, taking into consideration changes in market conditions including changes in mortgage spreads, changes in U.S. Treasury security yields and changes in generic pricing of 15-year and 30-year securities. Additional analysis may include a review of prices provided by other independent parties, a yield analysis, a review of average life changes using Bloomberg analytics and a review of historical pricing for a particular security.

Derivatives and Hedging Instruments

The fair values for the interest-rate swap assets and liabilities, risk participation agreements (RPA in/out), and foreign exchange derivatives represent a Level 2 valuation and are based on settlement values adjusted for credit risks associated with the counterparties and the Company and observable market interest rate curves and foreign exchange rates where applicable. Credit risk adjustments consider factors such as the likelihood of default by the Company and its counterparties, its netexposures and remaining contractual life. To date, the Company has not realized any losses due to a counterparty's inability to pay any net uncollateralized position. Refer also to Note 8, "Derivatives and Hedging Activities."

46

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

There were no transfers between levels for assets and liabilities recorded at fair value on a recurring basis during the three months endedMarch 31, 2018 and 2017, respectively.

Assets and Liabilities Recorded at Fair Value on a Non-Recurring Basis

Assets and liabilities measured at fair value on a non-recurring basis are summarized below at the dated indicated:

	Carrying Value as of March 31, 2018
	Level 1		Level 2		Level 3		Total
	(In Thousands)
Assets measured at fair value on a non-recurring basis:
Collateral-dependent impaired loans and leases	$	—	$	—	$	17,284	$	17,284
OREO	—		—		3,235		3,235
Repossessed assets	—		728		—		728
Total assets measured at fair value on a non-recurring basis	$	—	$	728	$	20,519	$	21,247

	Carrying Value as of December 31, 2017
	Level 1		Level 2		Level 3		Total
	(In Thousands)
Assets measured at fair value on a non-recurring basis:
Collateral-dependent impaired loans and leases	$	—	$	—	$	21,195	$	21,195
OREO	—		—		3,235		3,235
Repossessed assets	—		1,184		—		1,184
Total assets measured at fair value on a non-recurring basis	$	—	$	1,184	$	24,430	$	25,614

Collateral-Dependent Impaired Loans and Leases

For nonperforming loans and leases where the credit quality of the borrower has deteriorated significantly, fair values of the underlying collateral were estimated using purchase and sales agreements (Level 2), or comparable sales or recent appraisals (Level 3), adjusted for selling costs and other expenses.

Other Real Estate Owned

The Company records OREO at the lower of cost or fair value. In estimating fair value, the Company utilizes purchase and sales agreements (Level 2) or comparable sales, recent appraisals or cash flows discounted at an interest rate commensurate with the risk associated with these cash flows (Level 3), adjusted for selling costs and other expenses.

Repossessed Assets

Repossessed assets are carried at estimated fair value less costs to sell based on auction pricing (Level 2).

47

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

The table below presents quantitative information about significant unobservable inputs (Level 3) for assets measured at fair value on a recurring basis at the dates indicated.

	Fair Value				Valuation Technique
	At March 31, 2018		At December 31, 2017
	(Dollars in Thousands)
Collateral-dependent impaired loans and leases	$	17,284	$	21,195	Appraisal of collateral (1)
Other real estate owned	3,235		3,235		Appraisal of collateral (1)

_______________________________________________________________________________

⁽¹⁾ Fair value is generally determined through independent appraisals of the underlying collateral. The Company may also use another available source of collateral assessment to determine a reasonable estimate of the fair value of the collateral. Appraisals may be adjusted by management for qualitative factors such as economic factors and estimated liquidation expenses. The range of the unobservable inputs used may vary but is generally 0% - 10% on the discount for costs to sell and 0% - 15% on appraisal adjustments.

Summary of Estimated Fair Values of Financial Instruments

The following table presents the carrying amount, estimated fair value, and placement in the fair value hierarchy of the Company's financial instruments at the dates indicated. This table excludes financial instruments for which the carrying amount approximates fair value. Financial assets for which the fair value approximates carrying value include cash and cash equivalents, restricted equity securities, and accrued interest receivable. Financial liabilities for which the fair value approximates carrying value include non-maturity deposits, short-term borrowings, and accrued interest payable.

					Fair Value Measurements
	Carrying Value		Estimated Fair Value		Level 1 Inputs		Level 2 Inputs		Level 3 Inputs
	(In Thousands)
At March 31, 2018
Financial assets:
Investment securities held-to-maturity:
GSE debentures	$	50,529	$	49,175	$	—	$	49,175	$	—
GSE MBSs	13,344		13,004		—		13,004		—
Municipal obligations	52,979		52,134		—		52,134		—
Foreign government obligations	500		497		—		—		497
Loans held-for-sale	756		756		—		756		—
Loans and leases, net	6,055,747		5,947,840		—		—		5,947,840
Restricted equity securities	66,164		66,164		—		—		66,164
Financial liabilities:
Certificates of deposit	1,361,722		1,346,500		—		1,346,500		—
Borrowed funds	1,099,429		1,075,857		—		1,075,857		—

48

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

					Fair Value Measurements
	Carrying Value		Estimated Fair Value		Level 1 Inputs		Level 2 Inputs		Level 3 Inputs
	(In Thousands)
At December 31, 2017
Financial assets:
Investment securities held-to-maturity:
GSE debentures	$	41,612	$	40,801	$	—	$	40,801	$	—
GSE MBSs	13,923		13,705		—		13,705		—
Municipal obligations	53,695		53,517		—		53,517		—
Foreign government obligations	500		500		—		—		500
Loans held-for-sale	2,628		2,628		—		2,628		—
Loans and leases, net	5,672,087		5,594,543		—		—		5,594,543
Restricted equity securities	59,369		59,369		—		—		59,369
Financial liabilities:
Certificates of deposit	1,207,470		1,198,201		—		1,198,201		—
Borrowed funds	1,020,819		995,335		—		995,335		—

Investment Securities Held-to-Maturity

The fair values of certain investment securities held-to-maturity are estimated using market prices provided by independent pricing services based on recent trading activity and other observable information, including but not limited to market interest-rate curves, referenced credit spreads and estimated prepayment speeds where applicable. These investments include GSE debentures, GSE MBSs, and municipal obligations, all of which are included in Level 2. Additionally, fair values of foreign government obligations are estimated using pricing models and are considered to be Level 3.

Loans Held-for-Sale

Fair value is measured using quoted market prices when available. These assets are typically categorized as Level 1. If quoted market prices are not available, comparable market values may be utilized. These assets are typically categorized as Level 2.

Loans and Leases

The fair values of performing loans and leases was estimated by segregating the portfolio into its primary loan and lease categories—commercial real estate mortgage, multi-family mortgage, construction, commercial, equipment financing, condominium association, residential mortgage, home equity and other consumer. These categories were further disaggregated based upon significant financial characteristics such as type of interest rate (fixed / variable) and payment status (current / past-due). The Company discounts the contractual cash flows for each loan category using interest rates currently being offered for loans with similar terms to borrowers of similar quality and incorporates estimates of future loan prepayments.

Restricted Equity Securities

The fair values of certain restricted equity securities are estimated using observable inputs adjusted for other unobservable information, including but not limited to probability assumptions and similar discounts where applicable. These restricted equity securities are considered to be Level 3.

Deposits

The fair values of deposit liabilities with no stated maturity (demand, NOW, savings and money market savings accounts) are equal to the carrying amounts payable on demand. The fair value of certificates of deposit represents contractual cash flows discounted using interest rates currently offered on deposits with similar characteristics and remaining maturities. The fair value estimates for deposits do not include the benefit that results from the low-cost funding provided by the Company's core deposit relationships (deposit-based intangibles).

49

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

Borrowed Funds

The fair value of federal funds purchased is equal to the amount borrowed. The fair value of FHLBB advances and repurchase agreements represents contractual repayments discounted using interest rates currently available for borrowings with similar characteristics and remaining maturities. The fair values reported for retail repurchase agreements are based on the discounted value of contractual cash flows. The discount rates used are representative of approximate rates currently offered on borrowings with similar characteristics and maturities. The fair values reported for subordinated deferrable interest debentures are based on the discounted value of contractual cash flows. The discount rates used are representative of approximate rates currently offered on instruments with similar terms and maturities.

(12) Commitments and Contingencies

Off-Balance Sheet Financial Instruments

The Company is party to off-balance sheet financial instruments in the normal course of business to meet the financing needs of its customers and to reduce its own exposure to fluctuations in interest rates. These financial instruments include loan commitments, standby and commercial letters of credits, and loan level derivatives. According to GAAP, these financial instruments are not recorded in the financial statements until they are funded or related fees are incurred or received.

The contract amounts reflect the extent of the involvement the Company has in particular classes of these instruments. Such commitments involve, to varying degrees, elements of credit risk and interest-rate risk in excess of the amount recognized in the consolidated balance sheets. The Company's exposure to credit loss in the event of non-performance by the counterparty is represented by the fair value of the instruments. The Company uses the same policies in making commitments and conditional obligations as it does for on-balance sheet instruments.

Financial instruments with off-balance-sheet risk at the dates indicated follow:

	At March 31, 2018		At December 31, 2017
	(In Thousands)
Financial instruments whose contract amounts represent credit risk:
Commitments to originate loans and leases:
Commercial real estate	$	34,112	$	76,653
Commercial	106,956		83,032
Residential mortgage	24,162		28,745
Unadvanced portion of loans and leases	608,440		571,668
Unused lines of credit:
Home equity	435,594		407,552
Other consumer	29,730		34,191
Other commercial	336		323
Unused letters of credit:
Financial standby letters of credit	9,972		12,422
Performance standby letters of credit	736		736
Commercial and similar letters of credit	184		184
Loan level derivatives (Notional principal amounts):
Receive fixed, pay variable	537,694		494,659
Pay fixed, receive variable	537,694		494,659
Risk participation-out agreements	37,162		36,627
Risk participation-in agreements	3,825		3,825
Foreign exchange contracts (Notional amounts):
Buys foreign currency, sells U.S. currency	1,330		1,495
Sells foreign currency, buys U.S. currency	1,335		1,502

50

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require the payment of a fee by the customer. Since some of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Company evaluates each customer's creditworthiness on a case-by-case basis. The amount of collateral obtained, if any, is based on management's credit evaluation of the borrower.

Standby and commercial letters of credits are conditional commitments issued by the Company to guarantee performance of a customer to a third party. These standby and commercial letters of credit are primarily issued to support the financing needs of the Company's commercial customers. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loans to customers.

From time to time, the Company enters into loan level derivatives, risk participation agreements or foreign exchange contracts with commercial customers and third-party financial institutions. These derivatives allow the Company to offer long-term fixed-rate commercial loans while mitigating the interest-rate or foreign exchange risk of holding those loans. In a loan level derivative transaction, the Company lends to a commercial customer on a floating-rate basis and then enters into an loan level derivative with that customer. Concurrently, the Company enters into offsetting swaps with a third-party financial institution, effectively minimizing its net interest-rate risk exposure resulting from such transactions.

The fair value of derivative assets and liabilities was $13.7 million and $13.7 million, respectively, as of March 31, 2018. The fair value of derivative assets and liabilities was $9.1 million and $8.9 million, respectively, as of December 31, 2017.

The fair value of foreign exchange assets and liabilities was $65.0 thousand and $60.0 thousand, respectively, as of March 31, 2018. The fair value of foreign exchange assets and liabilities was $72.0 thousand and $65.0 thousand as of December 31, 2017.

Lease Commitments

The Company leases certain office space under various noncancellable operating leases. These leases have original terms ranging from 5 years to over 25 years. Certain leases contain renewal options and escalation clauses which can increase rental expenses based principally on the consumer price index and fair market rental value provisions.

Total lease commitments increased from $29,665 thousand as of December 31, 2017 to $31,004 thousand as of March 31, 2018. The increase is due to the addition of the leases of 2 former First Commons Bank branches and an ATM location, the opening of 2 new C&I lending offices in Braintree and Wakefield and the execution of a lease extension made for Eastern Funding. A summary of future minimum rental payments under such leases at the dates indicated follows:

	Minimum Rental Payments
	(In Thousands)
Remainder of 2018	$	4,323
Year ending:
2019	5,366
2020	4,691
2021	3,635
2022	2,807
2023	2,225
Thereafter	7,957
Total	$	31,004

Certain leases contain escalation clauses for real estate taxes and other expenditures, which are not included above. Total rental expense was $1.4 million and $1.4 million for the three months ended March 31, 2018 and 2017, respectively.

51

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

Legal Proceedings

In the normal course of business, there are various outstanding legal proceedings. In the opinion of management, after consulting with legal counsel, the consolidated financial position and results of operations of the Company are not expected to be affected materially by the outcome of such proceedings.

(13) Revenue from Contracts with Customers

Overview

Revenue from contracts with customers in the scope of Accounting Standards Codification (“ASC”) Topic 606 is measured based on the consideration specified in the contract with a customer and excludes amounts collected on behalf of third parties. The Company recognizes revenue from contracts with customers when it satisfies its performance obligations.

The Company’s performance obligations are generally satisfied as services are rendered and can either be satisfied at a point in time or over time. Unsatisfied performance obligations at the report date are not material to our consolidated financial statements.

In certain cases, other parties are involved with providing services to our customers. If the Company is a principal in the transaction (providing services itself or through a third party on its behalf), revenues are reported based on the gross consideration received from the customer and any related expenses are reported gross in noninterest expense. If the Company is an agent in the transaction (referring to another party to provide services), the Company reports its net fee or commission retained as revenue.

Accounting Policy Updates

The Company adopted Topic 606 “Revenue from Contracts with Customers” effective January 1, 2018 and has applied the guidance to all contracts within the scope of Topic 606 as of that date. As a result, the Company has modified its accounting policy for revenue recognition as detailed in this footnote.

As discussed in Note 1, the Company applied Topic 606 using the modified retrospective method, therefore, the prior period comparative information has not been adjusted and continues to be reported under Topic 605. There was no cumulative effect adjustment as of January 1, 2018, and there were no material changes to our consolidated financial statements at or for the three months ended March 31, 2018, as a result of adopting Topic 606.

The Company applied the practical expedient pertaining to contracts with original expected duration of one year or less and does not disclose information about remaining performance obligations on such contracts.

The Company also applied the practical expedient pertaining to contracts for which, at contract inception, the period between when the entity transfers the services and when the customer pays for those services will be one year or less. As such, the Company does not adjust the consideration from customers for the effects of a significant financing component.

A substantial portion of the Company’s revenue is specifically excluded from the scope of Topic 606. This exclusion is associated with financial instruments, including interest income on loans and investment securities, in addition to loan derivative income and gains on loan and investment sales. For the revenue that is in-scope of Topic 606, the following is a description of principal activities from which the Company generates its revenue from contracts with customers, separated by the timing of revenue recognition.

Revenue Recognized at a Point in Time

The Company recognizes revenue that is transactional in nature and such revenue is earned at a point in time. Revenue that is recognized at a point in time includes card interchange fees (fee income related to debit card transactions), ATM fees, wire transfer fees, overdraft charge fees, and stop-payment and returned check fees. Additionally, revenue is collected from loan fees, such as letters of credit, line renewal fees and application fees. Such revenue is derived from transactional information and is recognized as revenue immediately as the transactions occur or upon providing the service to complete the customer’s transaction.

52

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements (Continued)

At and for the Three Months Ended March 31, 2018 and 2017

Revenue Recognized Over Time

The Company recognizes revenue over a period of time, generally monthly, as services are performed and performance obligations are satisfied. Such revenue includes commissions on investments, insurance sales and service charges on deposit accounts. Fee revenue from service charges on deposit accounts represent the service charges assessed to customers who hold deposit accounts at the Bank.

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

Forward-Looking Statements

Certain statements contained in this Quarterly Report on Form 10-Q that are not historical facts may constitute forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, and are intended to be covered by the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Forward-looking statements involve risks and uncertainties. These statements, which are based on certain assumptions and describe Brookline Bancorp, Inc.’s (the “Company’s”) future plans, strategies and expectations, can generally be identified by the use of the words “may,” “will,” “should,” “could,” “would,” “plan,” “potential,” “estimate,” “project,” “believe,” “intend,” “anticipate,” “expect,” “target” and similar expressions. These statements include, among others, statements regarding the Company’s intent, belief or expectations with respect to economic conditions, trends affecting the Company’s financial condition or results of operations, and the Company’s exposure to market, liquidity, interest-rate and credit risk.

Forward-looking statements are based on the current assumptions underlying the statements and other information with respect to the beliefs, plans, objectives, goals, expectations, anticipations, estimates and intentions of management and the financial condition, results of operations, future performance and business are only expectations of future results. Although the Company believes that the expectations reflected in the Company’s forward-looking statements are reasonable, the Company’s actual results could differ materially from those projected in the forward-looking statements as a result of, among other factors,the inability to achieve the synergies and value creation contemplated by the acquisition of First Commons Bank; the inability to successfully integrate operations of First Commons Bank into Brookline Bank; the inability to maintain relationships with First Commons Bank key partners, customers and employees, and on its operating results and business generally; adverse conditions in the capital and debt markets; changes in interest rates; competitive pressures from other financial institutions; the effects of weakness in general economic conditions on a national basis or in the local markets in which the Company operates, including changes which adversely affect borrowers’ ability to service and repay their loans and leases; changes in the value of securities and other assets in the Company’s investment portfolio; changes in loan and lease default and charge-off rates; the adequacy of allowances for loan and lease losses; decreases in deposit levels that necessitate increases in borrowing to fund loans and investments; operational risks including, but not limited to, cybersecurity and natural disaster; changes in government regulation; the risk that goodwill and intangibles recorded in the Company’s financial statements will become impaired; and changes in assumptions used in making such forward-looking statements, as well as the other risks and uncertainties detailed in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2017 and other filings submitted to the Securities and Exchange Commission. Forward-looking statements speak only as of the date on which they are made. The Company does not undertake any obligation to update any forward-looking statement to reflect circumstances or events that occur after the date the forward-looking statements are made.

Introduction

Brookline Bancorp, Inc., a Delaware corporation, operates as a multi-bank holding company for Brookline Bank and its subsidiaries; Bank Rhode Island and its subsidiaries ("BankRI"); First Ipswich Bank and its subsidiaries ("First Ipswich"); and Brookline Securities Corp.

As a commercially-focused financial institution with 53 full-service banking offices throughout greater Boston, the north shore of Massachusetts and Rhode Island, the Company, through Brookline Bank, BankRI and First Ipswich (the “Banks”), offers a wide range of commercial, business and retail banking services, including a full complement of cash management products, on-line and mobile banking services, consumer and residential loans and investment advisory services, designed to meet the financial needs of small- to mid-sized businesses and individuals throughout central New England. Specialty lending activities include equipment financing primarily in the New York and New Jersey metropolitan area.

The Company focuses its business efforts on profitably growing its commercial lending businesses, both organically and through acquisitions. The Company’s customer focus, multi-bank structure, and risk management are integral to its organic

53

growth strategy and serve to differentiate the Company from its competitors. As full-service financial institutions, the Banks and their subsidiaries focus their efforts on developing and deepening long-term banking relationships with qualified customers through a full complement of products and excellent customer service, and strong risk management.

The Company manages the Banks under uniform strategic objectives, with one set of uniform policies consistently applied by one executive management team. Within this environment, the Company believes that the ability to make customer decisions locally enhances management's motivation, service levels and, as a consequence, the Company's financial results. As such, while most back-office functions are consolidated at the holding company level, branding and decision-making, including credit decisions and pricing, remain largely local in order to better meet the needs of bank customers and further motivate the Banks’ commercial, business and retail bankers.

The competition for loans and leases and deposits remains intense. While the economy has improved in 2018, the Company expects the operating environment to remain challenging. The volume of loan and lease originations and loan and lease losses will depend, to a large extent, on how the economy performs. Loan and lease growth and deposit growth are also greatly influenced by the rate-setting actions of the Board of Governors of the Federal Reserve System (“FRB”). A sustained, low interest rate environment with a flat interest rate curve may negatively impact the Company's yields and net interest margin. While the Company is slightly asset sensitive and should benefit from rising rates, these rate increases could precipitate a change in the mix and volume of the Company's deposits and loans. The future operating results of the Company will depend on its ability to maintain the net interest margin, while minimizing exposure to credit risk, along with increasing sources of non-interest income, while controlling the growth of non-interest expenses.

The Company and the Banks are supervised, examined and regulated by the FRB. As a Massachusetts-chartered savings bank and trust company, respectively, Brookline Bank and First Ipswich are also subject to regulation under the laws of the Commonwealth of Massachusetts and the jurisdiction of the Massachusetts Division of Banks. As a Rhode Island-chartered financial institution, BankRI is also subject to regulation under the laws of the State of Rhode Island and the jurisdiction of the Banking Division of the Rhode Island Department of Business Regulation. The FDIC continues to insure each of the Banks’ deposits up to $250,000 per depositor. As a Massachusetts-chartered savings bank, Brookline Bank is also insured by the Depositors Insurance Fund (“DIF”), a private industry-sponsored company. The DIF insures savings bank deposits in excess of the FDIC insurance limits. As such, Brookline Bank offers 100% insurance on all deposits as a result of a combination of insurance from the FDIC and the DIF.

The Company’s common stock is traded on the Nasdaq Global Select Market^SM under the symbol “BRKL.”

54

Selected Financial Data

The following is based in part on, and should be read in conjunction with, the consolidated financial statements and accompanying notes, and other information appearing elsewhere in this Form 10-Q.

	At and for the Three Months Ended
	March 31,			December 31,			September 30,			June 30,			March 31,
	2018			2017			2017			2017			2017
	(Dollars in Thousands, Except Per Share Data)
PER COMMON SHARE DATA
Earnings per share - Basic	$	0.24		$	0.09		$	0.20		$	0.20		$	0.19
Earnings per share - Diluted	0.24			0.09			0.20			0.20			0.19
Book value per share (end of period)	10.80			10.49			10.52			10.42			10.00
Tangible book value per share (end of period) (1)	8.69			8.61			8.63			8.52			7.93
Dividends paid per common share	0.09			0.09			0.09			0.09			0.09
Stock price (end of period)	16.20			15.70			15.50			14.60			15.65
PERFORMANCE RATIOS
Net interest margin (taxable equivalent basis)	3.66		%	3.59		%	3.57		%	3.59		%	3.53		%
Return on average assets	1.08		%	0.41		%	0.92		%	0.91		%	0.83		%
Return on average tangible assets (1)	1.10		%	0.41		%	0.94		%	0.93		%	0.85		%
Return on average stockholders' equity	8.98		%	3.37		%	7.64		%	7.76		%	7.58		%
Return on average tangible stockholders' equity (1)	11.01		%	4.09		%	9.31		%	9.58		%	9.55		%
Dividend payout ratio (1)	37.11		%	101.05		%	44.90		%	46.28		%	47.23		%
Efficiency ratio (3)	60.83		%	55.38		%	56.37		%	57.93		%	48.92		%
ASSET QUALITY RATIOS
Net loan and lease charge-offs as a percentage of average loans and leases (annualized)	0.03		%	0.60		%	0.14		%	0.17		%	0.07		%
Nonperforming loans and leases as a percentage of total loans and leases	0.43		%	0.48		%	0.71		%	0.76		%	0.83		%
Nonperforming assets as a percentage of total assets	0.42		%	0.47		%	0.66		%	0.71		%	0.73		%
Total allowance for loan and lease losses as a percentage of total loans and leases	0.96		%	1.02		%	1.16		%	1.17		%	1.21		%
Allowance for loan and lease losses related to originated loans and leases as a percentage of originated loans and leases (1)	1.03		%	1.05		%	1.20		%	1.20		%	1.25		%
CAPITAL RATIOS
Stockholders' equity to total assets	11.94		%	11.86		%	12.04		%	11.95		%	10.83		%
Tangible equity ratio (1)	9.85		%	9.94		%	10.09		%	9.99		%	8.79		%
FINANCIAL CONDITION DATA
Total assets	$	7,248,114		$	6,780,249		$	6,686,284		$	6,658,067		$	6,497,721
Total loans and leases	6,114,461			5,730,679			5,639,440			5,537,406			5,461,779
Allowance for loan and lease losses	58,714			58,592			65,413			64,521			66,133
Investment securities available-for-sale	558,357			540,124			522,910			540,976			528,433
Investment securities held-to-maturity	117,352			109,730			107,738			108,963			100,691
Goodwill and identified intangible assets	168,593			143,934			144,453			144,972			145,491
Total deposits	5,191,520			4,871,343			4,805,683			4,709,419			4,651,903
													(Continued)

55

	At and for the Three Months Ended
	March 31,		December 31,		September 30,		June 30,		March 31,
	2018		2017		2017		2017		2017
	(Dollars in Thousands, Except Per Share Data)
Total borrowed funds	1,099,429		1,020,819		985,895		1,066,643		1,056,785
Stockholders' equity	865,777		803,830		804,762		795,618		703,873
EARNINGS DATA
Net interest income	$	59,491	$	57,657	$	56,843	$	55,583	$	53,098
Provision for credit losses	641		1,802		2,911		873		13,402
Non-interest income	6,168		5,815		5,973		4,477		15,908
Non-interest expense	39,938		35,152		35,408		34,795		33,756
Net income	18,633		6,827		15,366		14,880		13,445

_______________________________________________________________________________

(1) Refer to "Non-GAAP Financial Measures and Reconciliations to GAAP".

(2) All performance ratios are annualized and are based on average balance sheet amounts, where applicable.

(3) Efficiency ratio is calculated by dividing non-interest expense by the sum of non-interest income and net interest income.

Executive Overview

On March 1, 2018, the Company completed the acquisition of First Commons Bank.  First Commons Bank was merged with and into Brookline Bank. Refer also to Note 2, "Acquisitions."

Growth

Total assets of $7.2 billion as of March 31, 2018increased$467.9 million, from December 31, 2017. The increase was primarily driven by increases in loans and leases.

Total loans and leases of $6.1 billion as of March 31, 2018increased$383.8 million, from December 31, 2017. Excluding the First Commons Bank acquired loans at fair value, loans increased $121.7 million during the quarter or 8.5% on an annualized basis. The Company's commercial loan portfolios, which are comprised of commercial real estate loans and commercial loans and leases, totaled $4.9 billion, or 80.9% of total loans and leases, as of March 31, 2018, an increase of $247.4 million, or 21.1% on an annualized basis, from $4.7 billion, or 82.0% of total loans and leases, as of December 31, 2017.

Total deposits of $5.2 billion as of March 31, 2018increased$320.2 million, from $4.9 billion as of December 31, 2017. Excluding the First Commons Bank acquired deposits at fair value, deposits increased $46.5 million during the quarter or 3.8% on an annualized basis. Core deposits, which include demand checking, NOW, money market and savings accounts, totaled $3.8 billion, or 73.8% of total deposits as of March 31, 2018, an increase of $165.9 million, from $3.7 billion, or 75.2% of total deposits, as of December 31, 2017.

Asset Quality

Nonperforming assets as of March 31, 2018 totaled $30.2 million, or 0.42% of total assets, compared to $31.7 million, or0.47% of total assets, as of December 31, 2017. Net charge-offs for the three months ended March 31, 2018 were $0.5 million, or 0.03% of average loans and leases on an annualized basis, compared to $1.0 million, or 0.07% of average loans and leases on an annualized basis, for the three months ended March 31, 2017. The decrease in nonperforming assets was primarily driven by several equipment financing loans and leases which returned to accrual status during the first three months of 2018.

The ratio of the allowance for loan and lease losses to total loans and leases was 0.96% as of March 31, 2018, compared to 1.02% as of December 31, 2017. The decrease in the allowance for loan and lease losses as a percentage of total loans and leases is largely a result of the addition of First Commons Bank loans and leases to the total amount of the Company loans and leases, without a simultaneous addition of historical, pre-acquisition allowance for loan and lease losses. Excluding the loans acquired from BankRI and First Ipswich, the allowance for loan and lease losses related to originated loans and leases as a percentage of the total originated loan and lease portfolio was 1.03% as of March 31, 2018, compared to 1.05% as of December 31, 2017. The Company continued to employ its historical underwriting methodology throughout the three month period ended March 31, 2018. Refer also to Note 5, "Allowance for Loan and Lease Losses."

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Capital Strength

The Company is a "well-capitalized" bank holding company as defined in the FRB's Regulation Y. The Company's common equity Tier 1 Capital Ratio was 12.03% as of March 31, 2018, compared to 12.02% as of December 31, 2017. The Company's Tier 1 Leverage Ratio was 10.50% as of March 31, 2018, compared to 10.43% as of December 31, 2017. As of March 31, 2018, the Company's Tier 1 Risk-Based Capital Ratio was 12.34%, compared to 12.34% as of December 31, 2017. The Company's Total Risk-Based Capital Ratio was 14.62% as of March 31, 2018, compared to 14.75% as of December 31, 2017.

The Company's ratio of stockholders' equity to total assets was 11.94% and 11.86% as of March 31, 2018 and December 31, 2017, respectively. The Company's tangible equity ratio was 9.85% and 9.94% as of March 31, 2018 and December 31, 2017, respectively.

Net Income

For the three months ended March 31, 2018, the Company reported net income of $18.6 million, or $0.24 per basic and diluted share, an increase of $5.2 million, or 154.4% on an annualized basis, from $13.4 million, or $0.19 per basic and diluted share for the three months ended March 31, 2017. This increase in net income is primarily the result of an increase in net interest income of $6.4 million, a decrease in the provision for credit losses of $12.8 million and decrease in the provision for income taxes of $2.2 million, partially offset by the deccrease in non-interest income of $9.7 million and an increase in non-interest expense of $6.2 million. Refer to “Results of Operations" below for further discussion.

The annualized return on average assets was 1.08% for the three months ended March 31, 2018, compared to 0.83% for the three months ended March 31, 2017. The annualized return on average stockholders' equity was 8.98% for the three months ended March 31, 2018, compared to 7.58% for the three months ended March 31, 2017.

The net interest margin was 3.66% for the three months ended March 31, 2018, up from 3.53% for the three months ended March 31, 2017. The increase in the net interest margin is a result of an increase in the yield on interest-earning assets by27basis points to 4.35% for the three months ended March 31, 2018 from 4.08% for the three months ended March 31, 2017,partially offset by an increase of 15basis points in the Company's overall cost of funds to 0.81% for the three months ended March 31, 2018 from 0.66% for the three months ended March 31, 2017.

The Company's net interest margin and net interest income have shown improvement from the most recent low interest rate environment. As interest rates continue to rise, the Company's net interest margin and net interest income may continue to be under pressure due to competitive pricing in all loan categories and the Company’s ability to contain its cost of funds.

Critical Accounting Policies

The SEC defines “critical accounting policies” as those involving significant judgments and difficult or complex assumptions by management, often as a result of the need to make estimates about matters that are inherently uncertain or variable, which have, or could have, a material impact on the carrying value of certain assets or net income. The preparation of financial statements in accordance with U.S. generally accepted accounting principles (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, income and expenses, and disclosure of contingent assets and liabilities. Actual results could differ from those estimates. As discussed in the Company’s 2017 Annual Report on Form 10-K, management has identified the valuation of available-for-sale securities, accounting for assets and liabilities acquired, the determination of the allowance for loan and lease losses, the review of goodwill and intangibles for impairment, income tax accounting, and valuation of deferred tax assets as the Company’s most critical accounting policies.

Non-GAAP Financial Measures and Reconciliation to GAAP

In addition to evaluating the Company’s results of operations in accordance with GAAP, management periodically supplements this evaluation with an analysis of certain non-GAAP financial measures, such as operating earnings metrics, the return on average tangible assets, return on average tangible equity, the tangible equity ratio, tangible book value per share, dividend payout ratio, and the ratio of the allowance for loan and lease losses related to originated loans and leases as a percentage of originated loans and leases. Management believes that these non-GAAP financial measures provide information useful to investors in understanding the Company’s underlying operating performance and trends, and facilitates comparisons with the performance assessment of financial performance, including non-interest expense control, while the tangible equity ratio and tangible book value per share are used to analyze the relative strength of the Company’s capital position.

57

The following table summarizes the Company’s operating earnings, operating return on average assets and operating return on average stockholders’ equity for the periods indicated:

	At and for the Three Months Ended   March 31,
	2018		2017
Net income, as reported	$	18,633	$	13,445
Less:
Security gains (after-tax of 24.0% for 2018 and 35.9% for 2017) (1)	883		7,303
Add:
Merger and acquisition-related expenses (after-tax of 24.0% for 2018 and 35.9% for 2017) (1) (2)	2,208		—
Operating earnings	$	19,958	$	6,142
Basic earnings per share, as reported	$	0.24	$	0.19
Less:
Security gains	0.01		0.10
Add:
Merger and acquisition-related expenses (2)	0.03		—
Basic operating earnings per share	$	0.26	$	0.09

___________________________________________________________________

(1) Based on current expected effective tax rate of 24% for the remainder of 2018.

(2) Merger and acquisition expense related to the acquisition of First Commons Bank in the first quarter of 2018.

The following table summarizes the Company’s return on average tangible assets and return on average tangible stockholders’ equity for the periods indicated:

	Three Months Ended
	March 31, 2018			December 31, 2017			September 30, 2017			June 30, 2017			March 31, 2017
	(Dollars in Thousands)
Operating earnings	$	19,958		$	15,922		$	15,501		$	14,880		$	6,142
Average total assets	$	6,927,309		$	6,725,730		$	6,681,042		$	6,556,665		$	6,461,183
Less: Average goodwill and average identified intangible assets, net	152,377			144,226			144,747			145,269			145,778
Average tangible assets	$	6,774,932		$	6,581,504		$	6,536,295		$	6,411,396		$	6,315,405
Return on average assets (annualized)	1.08		%	0.41		%	0.92		%	0.91		%	0.83		%
Less:
Security gains	0.05		%	—		%	—		%	—		%	0.45		%
Add:
Merger and acquisition-related expenses	0.12		%	0.01		%	0.01		%	—		%	—		%
Impact of Tax Reform Act	—		%	0.53		%	—		%	—		%	—		%
Operating return on average assets (annualized)	1.15		%	0.95		%	0.93		%	0.91		%	0.38		%
													(Continued)

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	Three Months Ended
	March 31, 2018			December 31, 2017			September 30, 2017			June 30, 2017			March 31, 2017
	(Dollars in Thousands)
Return on average tangible assets (annualized)	1.10		%	0.41		%	0.94		%	0.93		%	0.85		%
Less:
Security gains	0.05		%	—		%	—		%	—		%	0.46		%
Add:
Merger and acquisition-related expenses	0.13		%	0.01		%	0.01		%	—		%	—		%
Impact of Tax Reform Act	—		%	0.55		%	—		%	—		%	—		%
Operating return on average tangible assets (annualized)	1.18		%	0.97		%	0.95		%	0.93		%	0.39		%
Average total stockholders' equity	$	829,598		$	811,219		$	804,666		$	766,529		$	709,095
Less: Average goodwill and average identified intangible assets, net	152,377			144,226			144,747			145,269			145,778
Average tangible stockholders' equity	$	677,221		$	666,993		$	659,919		$	621,260		$	563,317
Return on average stockholders' equity (annualized)	8.98		%	3.37		%	7.64		%	7.76		%	7.58		%
Less:
Security gains	0.43		%	—		%	—		%	—		%	4.12		%
Add:
Merger and acquisition-related expenses	1.07		%	0.06		%	0.07		%	—		%	—		%
Impact of Tax Reform Act	—		%	4.42		%	—		%	—		%	—		%
Operating return on average stockholders' equity (annualized)	9.62		%	7.85		%	7.71		%	7.76		%	3.46		%
Return on average tangible stockholders' equity (annualized)	11.01		%	4.09		%	9.31		%	9.58		%	9.55		%
Less:
Security gains	0.52		%	—		%	—		%	—		%	5.19		%
Add:
Merger and acquisition-related expenses	1.30		%	0.08		%	0.09		%	—		%	—		%
Impact of Tax Reform Act	—		%	5.38		%	—		%	—		%	—		%
Operating return on average tangible stockholders' equity (annualized)	11.79		%	9.55		%	9.40		%	9.58		%	4.36		%

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	Three Months Ended
	March 31, 2018			December 31, 2017			September 30, 2017			June 30, 2017			March 31, 2017
	(Dollars in Thousands)
Net income, as reported	$	18,633		$	6,827		$	15,366		$	14,880		$	13,445
Average total assets	$	6,927,309		$	6,725,730		$	6,681,042		$	6,556,665		$	6,461,183
Less: Average goodwill and average identified intangible assets, net	152,377			144,226			144,747			145,269			145,778
Average tangible assets	$	6,774,932		$	6,581,504		$	6,536,295		$	6,411,396		$	6,315,405
Return on average tangible assets (annualized)	1.10		%	0.41		%	0.94		%	0.93		%	0.85		%
Average total stockholders' equity	$	829,598		$	811,219		$	804,666		$	766,529		$	709,095
Less: Average goodwill and average identified intangible assets, net	152,377			144,226			144,747			145,269			145,778
Average tangible stockholders' equity	$	677,221		$	666,993		$	659,919		$	621,260		$	563,317
Return on average tangible stockholders' equity (annualized)	11.01		%	4.09		%	9.31		%	9.58		%	9.55		%

The following tables summarize the Company's tangible equity ratio for the periods indicated:

	Three Months Ended
	March 31, 2018			December 31, 2017			September 30, 2017			June 30, 2017			March 31, 2017
	(Dollars in Thousands)
Total stockholders' equity	$	865,777		$	803,830		$	804,762		$	795,618		$	703,873
Less: Goodwill and identified intangible assets, net	168,593			143,934			144,453			144,972			145,491
Tangible stockholders' equity	$	697,184		$	659,896		$	660,309		$	650,646		$	558,382
Total assets	$	7,248,114		$	6,780,249		$	6,686,284		$	6,658,067		$	6,497,721
Less: Goodwill and identified intangible assets, net	168,593			143,934			144,453			144,972			145,491
Tangible assets	$	7,079,521		$	6,636,315		$	6,541,831		$	6,513,095		$	6,352,230
Tangible equity ratio	9.85		%	9.94		%	10.09		%	9.99		%	8.79		%

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The following tables summarize the Company's tangible book value per share for the periods indicated:

	Three Months Ended
	March 31, 2018		December 31, 2017		September 30, 2017		June 30, 2017		March 31, 2017
	(Dollars in Thousands)
Tangible stockholders' equity	$	697,184	$	659,896	$	660,309	$	650,646	$	558,382
Common shares issued	85,177,172		81,695,695		81,695,695		81,695,695		75,744,445
Less:
Treasury shares	4,401,333		4,440,665		4,572,954		4,717,775		4,707,096
Unallocated ESOP	134,238		142,332		150,921		159,510		168,099
Unvested restricted stock	455,283		455,283		471,702		457,966		476,854
Common shares outstanding	80,186,318		76,657,415		76,500,118		76,360,444		70,392,396
Tangible book value per share	$	8.69	$	8.61	$	8.63	$	8.52	$	7.93

The following table summarizes the Company's dividend payout ratio for the periods indicated:

	Three Months Ended
	March 31, 2018			December 31, 2017			September 30, 2017			June 30, 2017			March 31, 2017
	(Dollars in Thousands)
Dividends paid	$	6,914		$	6,899		$	6,899		$	6,887		$	6,350
Net income, as reported	$	18,633		$	6,827		$	15,366		$	14,880		$	13,445
Dividend payout ratio	37.11		%	101.05		%	44.90		%	46.28		%	47.23		%

The following table summarizes the Company’s allowance for loan and lease losses related to originated loans and leases as a percentage of total originated loans and leases for the periods indicated:

	Three Months Ended
	March 31, 2018			December 31, 2017			September 30, 2017			June 30, 2017			March 31, 2017
Allowance for loan and lease losses	$	58,714		$	58,592		$	65,413		$	64,521		$	66,133
Less: Allowance for acquired loan and lease losses	910			1,040			1,003			1,188			1,304
Allowance for originated loan and lease losses	$	57,804		$	57,552		$	64,410		$	63,333		$	64,829
Total loans and leases	$	6,114,461		$	5,730,679		$	5,639,440		$	5,537,406		$	5,461,779
Less: Total acquired loans and leases	482,237			240,057			260,196			271,157			295,055
Total originated loan and leases	$	5,632,224		$	5,490,622		$	5,379,244		$	5,266,249		$	5,166,724
Allowance for loan and lease losses related to originated loans and leases as a percentage of originated loan and leases	1.03		%	1.05		%	1.20		%	1.20		%	1.25		%

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Financial Condition

Loans and Leases

The following table summarizes the Company's portfolio of loans and leases receivables as of the dates indicated:

	At March 31, 2018					At December 31, 2017
	Balance			Percent of Total		Balance			Percent of Total
	(Dollars in Thousands)
Commercial real estate loans:
Commercial real estate	$	2,278,028		37.1	%	$	2,174,969		38.0	%
Multi-family mortgage	793,590			13.0	%	760,670			13.3	%
Construction	168,640			2.8	%	140,138			2.4	%
Total commercial real estate loans	3,240,258			52.9	%	3,075,777			53.7	%
Commercial loans and leases:
Commercial	761,922			12.5	%	705,004			12.3	%
Equipment financing	892,341			14.6	%	866,488			15.1	%
Condominium association	52,739			0.9	%	52,619			0.9	%
Total commercial loans and leases	1,707,002			28.0	%	1,624,111			28.3	%
Consumer loans:
Residential mortgage	773,003			12.6	%	660,065			11.5	%
Home equity	364,870			6.0	%	355,954			6.2	%
Other consumer	29,328			0.5	%	14,772			0.3	%
Total consumer loans	1,167,201			19.1	%	1,030,791			18.0	%
Total loans and leases	6,114,461			100.0	%	5,730,679			100.0	%
Allowance for loan and lease losses	(58,714		)			(58,592		)
Net loans and leases	$	6,055,747				$	5,672,087

The following table sets forth the growth in the Company’s loan and lease portfolios during the three months endedMarch 31, 2018:

	At March 31, 2018		At December 31, 2017		Dollar Change		Percent Change (Annualized)
	(Dollars in Thousands)
Commercial real estate	$	3,240,258	$	3,075,777	$	164,481	21.4	%
Commercial	1,707,002		1,624,111		82,891		20.4	%
Consumer	1,167,201		1,030,791		136,410		52.9	%
Total loans and leases	$	6,114,461	$	5,730,679	$	383,782	26.8	%

The Company's loan portfolio consists primarily of first mortgage loans secured by commercial, multi-family and residential real estate properties located in the Company's primary lending area, loans to business entities, including commercial lines of credit, loans to condominium associations and loans and leases used to finance equipment used by small businesses. The Company also provides financing for construction and development projects, home equity and other consumer loans.

The Company employs seasoned commercial lenders and retail bankers who rely on community and business contacts as well as referrals from customers, attorneys and other professionals to generate loans and deposits. Existing borrowers are also an important source of business since many of them have more than one loan outstanding with the Company. The Company's ability to originate loans depends on the strength of the economy, trends in interest rates, and levels of customer demand and market competition.

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The Company's current policy is that the aggregate amount of loans outstanding to any one borrower or related entities may not exceed $35.0 million unless approved by the Board Credit Committee, a committee of the Company's Board of Directors.

As of March 31, 2018, there were twelve borrowers with loans and commitments over $35.0 million. The total of those loans and commitments were $540.7 million, or 7.8% of total loans and commitments, as of March 31, 2018.

The Company has written underwriting policies to control the inherent risks in loan origination. The policies address approval limits, loan-to-value ratios, appraisal requirements, debt service coverage ratios, loan concentration limits and other matters relevant to loan underwriting.

Commercial Real Estate Loans

The commercial real estate portfolio is comprised of commercial real estate loans, multi-family mortgage loans, and construction loans and is the largest component of the Company's overall loan portfolio, representing 52.9% of total loans and leases outstanding as of March 31, 2018.

Typically, commercial real estate loans are larger in size and involve a greater degree of risk than owner-occupied residential mortgage loans. Loan repayment is usually dependent on the successful operation and management of the properties and the value of the properties securing the loans. Economic conditions can greatly affect cash flows and property values.

A number of factors are considered in originating commercial real estate and multi-family mortgage loans. The qualifications and financial condition of the borrower (including credit history), as well as the potential income generation and the value and condition of the underlying property, are evaluated. When evaluating the qualifications of the borrower, the Company considers the financial resources of the borrower, the borrower's experience in owning or managing similar property and the borrower's payment history with the Company and other financial institutions. Factors considered in evaluating the underlying property include the net operating income of the mortgaged premises before debt service and depreciation, the debt service coverage ratio (the ratio of cash flow before debt service to debt service), the use of conservative capitalization rates, and the ratio of the loan amount to the appraised value. Generally, personal guarantees are obtained from commercial real estate loan borrowers.

Commercial real estate and multi-family mortgage loans are typically originated for terms of five to fifteen years with amortization periods of 20 to 30 years. Many of the loans are priced at inception on a fixed-rate basis generally for periods ranging from two to five years with repricing periods for longer-term loans. When possible, prepayment penalties are included in loan covenants on these loans. For commercial customers who are interested in loans with terms longer than five years, the Company offers loan level derivatives to accommodate customer need.

The Company's urban and suburban market area is characterized by a large number of apartment buildings, condominiums and office buildings. As a result, commercial real estate and multi-family mortgage lending has been a significant part of the Company's activities for many years. These types of loans typically generate higher yields, but also involve greater credit risk. Many of the Company's borrowers have more than one multi-family or commercial real estate loan outstanding with the Company.

The commercial real estate portfolio is composed primarily of loans secured by apartment buildings ($756.1 million), office buildings ($674.5 million), retail stores ($506.8 million), industrial properties ($366.3 million), mixed-use properties ($207.0 million), lodging services ($114.3 million) and to food services ($54.2 million) as of March 31, 2018. At that date, over 93.9% of the commercial real estate loans outstanding were secured by properties located in New England.

Construction and development financing is generally considered to involve a higher degree of risk than long-term financing on improved, occupied real estate and thus has lower concentration limits than do other commercial credit classes. Risk of loss on a construction loan is largely dependent upon the accuracy of the initial estimate of construction costs, the estimated time to sell or rent the completed property at an adequate price or rate of occupancy, and market conditions. If the estimates and projections prove to be inaccurate, the Company may be confronted with a project which, upon completion, has a value that is insufficient to assure full loan repayment.

Criteria applied in underwriting construction loans for which the primary source of repayment is the sale of the property are different from the criteria applied in underwriting construction loans for which the primary source of repayment is the stabilized cash flow from the completed project. For those loans where the primary source of repayment is from resale of the property, in addition to the normal credit analysis performed for other loans, the Company also analyzes project costs, the attractiveness of the property in relation to the market in which it is located and demand within the market area. For those construction loans where the source of repayment is the stabilized cash flow from the completed project, the Company analyzes

63

not only project costs but also how long it might take to achieve satisfactory occupancy and the reasonableness of projected rental rates in relation to market rental rates.

Commercial Loans

The commercial loan and lease portfolio is comprised of commercial loans, equipment financing loans and leases and condominium association loans and represented 28.0% of total loans outstanding as of March 31, 2018.

The commercial loan and lease portfolio is composed primarily of loans to small businesses ($527.9 million), transportation services ($350.5 million), recreation services ($154.8 million), food services ($122.5 million), manufacturing ($97.4 million), rental and leasing services ($85.9 million) and retail ($75.2 million) as of March 31, 2018.

The Company provides commercial banking services to companies in its market area. Approximately 46.3% of the commercial loans outstanding as of March 31, 2018 were made to borrowers located in New England. The remaining 53.7% of the commercial loans outstanding were made to borrowers in other areas in the United States of America, primarily by the Company's equipment financing divisions. Product offerings include lines of credit, term loans, letters of credit, deposit services and cash management. These types of credit facilities have as their primary source of repayment cash flows from the operations of a business. Interest rates offered are available on a floating basis tied to the prime rate or a similar index or on a fixed-rate basis referenced on the Federal Home Loan Bank of Boston ("FHLBB") index.

Credit extensions are made to established businesses on the basis of loan purpose and assessment of capacity to repay as determined by an analysis of their financial statements, the nature of collateral to secure the credit extension and, in most instances, the personal guarantee of the owner of the business as well as industry and general economic conditions. The Company also participates in U.S. Government programs such as the Small Business Administration (the "SBA") in both the 7A program and as an SBA preferred lender.

The Company’s equipment financing divisions focus on market niches in which its lenders have deep experience and industry contacts, and on making loans to customers with business experience. An important part of the Company’s equipment financing loan origination volume comes from equipment manufacturers and existing customers as they expand their operations. The equipment financing portfolio is composed primarily of loans to finance laundry, tow trucks, fitness, dry cleaning and convenience store equipment. Approximately 15.3% of the commercial loans outstanding were made to borrowers located primarily in the greater New York and New Jersey metropolitan area. Typically, the loans are priced at a fixed rate of interest and require monthly payments over their three- to seven-year life. The yields earned on equipment financing loans are higher than those earned on the commercial loans made by the Banks because they involve a higher degree of credit risk. Equipment financing customers are typically small-business owners who operate with limited financial resources and who face greater risks when the economy weakens or unforeseen adverse events arise. Because of these characteristics, personal guarantees of borrowers are usually obtained along with liens on available assets. The size of loan is determined by an analysis of cash flow and other characteristics pertaining to the business and the equipment to be financed, based on detailed revenue and profitability data of similar operations.

Loans to condominium associations are for the purpose of funding capital improvements, are made for five- to ten-year terms and are secured by a general assignment of condominium association revenues. Among the factors considered in the underwriting of such loans are the level of owner occupancy, the financial condition and history of the condominium association, the attractiveness of the property in relation to the market in which it is located and the reasonableness of estimates of the cost of capital improvements to be made. Depending on loan size, funds are advanced as capital improvements are made and, in more complex situations, after completion of engineering inspections.

Consumer Loans

The consumer loan portfolio is comprised of residential mortgage loans, home equity loans and lines of credit, and other consumer loans and represented 19.1% of total loans outstanding as of March 31, 2018. The Company focuses its mortgage and home equity lending on existing and new customers within its branch networks in its urban and suburban marketplaces in the greater Boston and Providence metropolitan areas.

The Company originates adjustable- and fixed-rate residential mortgage loans secured by one- to four-family residences. Each residential mortgage loan granted is subject to a satisfactorily completed application, employment verification, credit history and a demonstrated ability to repay the debt. Generally, loans are not made when the loan-to-value ratio exceeds 80% unless private mortgage insurance is obtained and/or there is a financially strong guarantor. Appraisals are performed by outside independent fee appraisers.

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In general, the Company maintains three-, five- and seven-year adjustable-rate mortgage loans and ten-year fixed-rate fully amortizing mortgage loans in its portfolio. Fixed-rate mortgage loans with maturities beyond ten years, such as 15- and 30-year fixed-rate mortgages, are generally sold into the secondary market on a servicing-released basis. The Banks act as correspondent banks in these secondary-market transactions. Loan sales in the secondary market provide funds for additional lending and other banking activities.

Underwriting guidelines for home equity loans and lines of credit are similar to those for residential mortgage loans. Home equity loans and lines of credit are limited to no more than 80% of the appraised value of the property securing the loan including the amount of any existing first mortgage liens.

Other consumer loans have historically been a modest part of the Company's loan originations. As of March 31, 2018, other consumer loans equaled $29.3 million, or 0.5% of total loans outstanding.

Asset Quality

Criticized and Classified Assets

The Company's management rates certain loans and leases as "other assets especially mentioned" ("OAEM"),

"substandard" or "doubtful" based on criteria established under banking regulations.These loans and leases are collectively referred to as "criticized" assets. Loans and leases rated OAEM have potential weaknesses that deserve management's close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects of the loan or lease at some future date. Loans and leases rated as substandard are inadequately protected by the payment capacity of the obligor or of the collateral pledged, if any. Substandard loans and leases have a well-defined weakness or weaknesses that jeopardize the liquidation of debt and are characterized by the distinct possibility that the Company will sustain some loss if existing deficiencies are not corrected. Loans and leases rated as doubtful have well-defined weaknesses that jeopardize the orderly liquidation of debt and partial loss of principal is likely. As of March 31, 2018, the Company had $69.8 million of total assets, including acquired assets, that were designated as criticized. This compares to $68.2 million of assets designated as criticized as of December 31, 2017. The increase in criticized assets was primarily due to the downgrade of several commercial loans, offset by the payoffs of several criticized loans during the first three months of 2018.

Nonperforming Assets

"Nonperforming assets" consist of nonperforming loans and leases, other real estate owned ("OREO") and other repossessed assets. Under certain circumstances, the Company may restructure the terms of a loan or lease as a concession to a borrower, except for acquired loans and leases which are individually evaluated against expected performance on the date of acquisition. These restructured loans and leases are generally considered "nonperforming loans and leases" until a history of collection of at least six months on the restructured terms of the loan or lease has been established. OREO consists of real estate acquired through foreclosure proceedings and real estate acquired through acceptance of a deed in lieu of foreclosure. Other repossessed assets consist of assets that have been acquired through foreclosure that are not real estate and are included in other assets on the Company's unaudited consolidated balance sheets.

Accrual of interest on loans generally is discontinued when contractual payment of principal or interest becomes past due 90 days or, if in management's judgment, reasonable doubt exists as to the full timely collection of interest. Exceptions may be made if the loan has matured and is in the process of renewal or is well-secured and in the process of collection. When a loan is placed on nonaccrual status, interest accruals cease and uncollected accrued interest is reversed and charged against current interest income. Interest payments on nonaccrual loans are generally applied to principal. If collection of the principal is reasonably assured, interest payments are recognized as income on the cash basis. Loans are generally returned to accrual status when principal and interest payments are current, full collectability of principal and interest is reasonably assured and a consistent record of at least six months of performance has been achieved.

In cases where a borrower experiences financial difficulties and the Company makes certain concessionary modifications to contractual terms, the loan is classified as a troubled debt restructured loan. In determining whether a debtor is experiencing financial difficulties, the Company considers, among other factors, if the debtor is in payment default or is likely to be in payment default in the foreseeable future without the modification, the debtor declared or is in the process of declaring bankruptcy, there is substantial doubt that the debtor will continue as a going concern, the debtor's entity-specific projected cash flows will not be sufficient to service its debt, or the debtor cannot obtain funds from sources other than the existing creditors at market terms for debt with similar risk characteristics.

Nonperforming assets are composed of nonaccrual loans and leases, OREO and other repossessed assets. As of March 31, 2018, the Company had nonperforming assets of $30.2 million, representing 0.42% of total assets, compared to nonperforming

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assets of $31.7 million, or 0.47% of total assets, as of December 31, 2017. The decrease in nonperforming assets was primarily driven by several equipment financing loans and leases which returned to accrual status during the first three months of 2018.

The Company evaluates the underlying collateral of each nonperforming loan and lease and continues to pursue the collection of interest and principal. Management believes that the current level of nonperforming assets remains manageable relative to the size of the Company's loan and lease portfolio. If economic conditions were to worsen or if the marketplace were to experience prolonged economic stress, management believes it is likely that the level of nonperforming assets would increase, as would the level of charged-off loans.            

Past Due and Accruing

Accrual of interest on loans generally is discontinued when contractual payment of principal or interest becomes past due 90 days or, if in management's judgment, reasonable doubt exists as to the full timely collection of interest. Exceptions may be made if the loan has matured and is in the process of renewal or is well-secured and in the process of collection. When a loan is placed on nonaccrual status, interest accruals cease and uncollected accrued interest is reversed and charged against current interest income. Interest payments on nonaccrual loans are generally applied to principal. If collection of the principal is reasonably assured, interest payments are recognized as income on the cash basis. Loans are generally returned to accrual status when principal and interest payments are current, full collectability of principal and interest is reasonably assured and a consistent record of at least six consecutive months of performance has been achieved.

As of March 31, 2018, the Company had loans and leases greater than 90 days past due and accruing of $3.9 million, or 0.06% of total loans and leases, compared to $3.0 million, or 0.05% of total loans and leases, as of December 31, 2017, representing an increase of $0.9 million. The increase in past due and accruing loans was primarily due to two commercial real estate loans and leases which became greater than 90 days past due during the first three months of 2018.

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The following table sets forth information regarding nonperforming assets for the periods indicated:

	At March 31, 2018			At December 31, 2017
	(Dollars in Thousands)
Nonperforming loans and leases:
Nonaccrual loans and leases:
Commercial real estate	$	4,080		$	3,313
Multi-family mortgage	588			608
Construction	860			860
Total commercial real estate loans	5,528			4,781
Commercial	11,150			11,619
Equipment financing	6,661			8,106
Total commercial loans and leases	17,811			19,725
Residential mortgage	1,962			1,979
Home equity	925			744
Other consumer	53			43
Total consumer loans	2,940			2,766
Total nonaccrual loans and leases	26,279			27,272
Other real estate owned	3,235			3,235
Other repossessed assets	728			1,184
Total nonperforming assets	$	30,242		$	31,691
Loans and leases past due greater than 90 days and accruing	$	3,882		$	3,020
Total nonperforming loans and leases as a percentage of total loans and leases	0.43		%	0.48		%
Total nonperforming assets as a percentage of total assets	0.42		%	0.47		%

Troubled Debt Restructured Loans and Leases

As of March 31, 2018, restructured loans included $1.5 million of commercial real estate loans, $0.6 million of multi-family mortgage loans, $12.9 million of commercial loans, $5.4 million of equipment financing loans and leases, $1.1 million of residential mortgage loans and $1.4 million of home equity loans. As of December 31, 2017, restructured loans included $5.0 million of commercial real estate loans, $0.6 million of multi-family mortgage loans, $13.9 million of commercial loans, $4.0 million of equipment financing loans and leases, $1.1 million of residential mortgage loans and $1.4 million of home equity loans. A restructured loan is a loan for which the maturity date was extended, the principal was reduced, and/or the interest rate was modified to drop the required monthly payment to a more manageable amount for the borrower.

The following table sets forth information regarding troubled debt restructured loans and leases at the dates indicated:

	At March 31, 2018		At December 31, 2017
	(Dollars in Thousands)
Troubled debt restructurings:
On accrual	$	14,294	$	16,241
On nonaccrual	8,610		9,770
Total troubled debt restructurings	$	22,904	$	26,011

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Changes in troubled debt restructured loans and leases were as follows for the periods indicated:

	Three Months Ended March 31,
	2018			2017
	(Dollars in Thousands)
Balance at beginning of period	$	26,011		$	25,802
Additions	2,190			765
Net charge-offs	(103		)	7
Repayments	(1,949		)	(1,156		)
Other reductions (1)	(3,245		)	—
Balance at end of period	$	22,904		$	25,418

^{__________________________________________________________________________________} 

^{(1) Includes loans and leases that were removed from TDR status.} 

Allowances for Credit Losses

The allowance for loan and lease losses consists of general and specific allowances and reflects management's estimate of probable loan and lease losses inherent in the loan portfolio at the balance sheet date. Management uses a consistent and systematic process and methodology to evaluate the adequacy of the allowance for loan and lease losses on a quarterly basis. The allowance is calculated by loan type: commercial real estate loans, commercial loans and leases, and consumer loans, each category of which is further segregated. A formula-based credit evaluation approach is applied to each group that is evaluated collectively, primarily by loss factors, which includes estimates of incurred losses over an estimated Loss Emergence Period ("LEP"), assigned to each risk rating by type, coupled with an analysis of certain loans individually evaluated for impairment. Management continuously evaluates and challenges inputs and assumptions in the allowance for loan and lease loss.

The process to determine the allowance for loan and lease losses requires management to exercise considerable judgment regarding the risk characteristics of the loan portfolios and the effect of relevant internal and external factors. While management evaluates currently available information in establishing the allowance for loan and lease losses, future adjustments to the allowance for loan and lease losses may be necessary if conditions differ substantially from the assumptions used in making the evaluations. Management performs a comprehensive review of the allowance for loan and lease losses on a quarterly basis. In addition, various regulatory agencies, as an integral part of their examination process, periodically review a financial institution's allowance for loan and lease losses and carrying amounts of other real estate owned. Such agencies may require the financial institution to recognize additions to the allowance based on their judgments about information available to them at the time of their examination.

The Company’s general allowance methodology provides a quantification of probable losses in the portfolio. Under the current methodology, Management combines the historical loss information of the Banks to generate a single set of ratios. Management believes it is appropriate to aggregate the ratios as the Banks share common environmental factors, operate in similar markets, and utilize common underwriting standards in accordance with the Company's Credit Policy.

Management employs a similar analysis for the consolidation of the qualitative factors as it does for the quantitative factors. Again, Management believes the combination of the existing nine qualitative factors used at each of the Banks into a single group of factors for use across the Company is appropriate based on the commonality of environmental factors, markets, and underwriting standards among the Banks.

As of March 31, 2018, the Company had a portfolio of approximately $18.5 million in loans secured by taxi medallions issued by the cities of Boston and Cambridge. As of December 31, 2017, this portfolio was approximately $19.7 million. Application-based mobile ride services, such as Uber and Lyft, have generated increased competition in the transportation sector, resulting in a reduction in taxi utilization and, as a result, a reduction in the collateral value and credit quality of taxi medallion loans. This has increased the likelihood that loans secured by taxi medallions may default, or that the borrowers may be unable to repay these loans at maturity, potentially resulting in an increase in past due loans, troubled debt restructurings, and charge-offs. The Company’s allowance calculation included a further segmentation of the commercial loans and leases to reflect the increased risk in the Company’s taxi medallion portfolio. This allowance calculation segmentation represents management’s estimations of the risks associated with the portfolio.

The following tables present the changes in the allowance for loan and lease losses by portfolio category for the three months endedMarch 31, 2018 and 2017.

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	At and for the Three Months Ended March 31, 2018
	Commercial Real Estate			Commercial			Consumer			Total
	(In Thousands)
Balance at December 31, 2017	$	27,112		$	26,333		$	5,147		$	58,592
Charge-offs	(3		)	(733		)	(56		)	(792		)
Recoveries	—			201			86			287
Provision (credit) for loan and lease losses	252			451			(76		)	627
Balance at March 31, 2018	$	27,361		$	26,252		$	5,101		$	58,714
Total loans and leases	$	3,240,258		$	1,707,002		$	1,167,201		$	6,114,461
Total allowance for loan and lease losses as a percentage of total loans and leases	0.84		%	1.54		%	0.44		%	0.96		%

	At and for the Three Months Ended March 31, 2017
	Commercial Real Estate			Commercial			Consumer			Total
	(In Thousands)
Balance at December 31, 2016	$	27,645		$	20,906		$	5,115		$	53,666
Charge-offs	(24		)	(1,207		)	(151		)	(1,382		)
Recoveries	140			142			105			387
Provision (credit) for loan and lease losses	227			13,442			(207		)	13,462
Balance at March 31, 2017	$	27,988		$	33,283		$	4,862		$	66,133
Total loans and leases	$	2,951,155		$	1,520,389		$	990,235		$	5,461,779
Total allowance for loan and lease losses as a percentage of total loans and leases	0.95		%	2.19		%	0.49		%	1.21		%

The allowance for loan and lease losses was $58.7 million as of March 31, 2018, or 0.96% of total loans and leases outstanding. This compared to an allowance for loan and lease losses of $58.6 million, or 1.02% of total loans and leases outstanding, as of December 31, 2017. The decrease in the allowance for loan and lease losses as a percentage of total loans and leases is largely a result of the addition of First Commons Bank loans and leases to the total amount of the Company loans and leases, without a simultaneous addition of historical, pre-acquisition allowance for loan and lease losses. Excluding the First Commons Bank acquired loans at fair value, loans increased $121.7 million during the quarter or 8.5% on an annualized basis.

Management believes that the allowance for loan and lease losses as of March 31, 2018 is appropriate based on the facts and circumstances discussed further below.

Commercial Real Estate Loans

The allowance for commercial real estate loan losses was $27.4 million, or 0.84% of total commercial real estate loans outstanding, as of March 31, 2018. This compared to an allowance for commercial real estate loan losses of $27.1 million, or 0.88% of total commercial real estate loans outstanding, as of December 31, 2017. There were no specific reserves on commercial real estate loans as of March 31, 2018 and December 31, 2017, respectively. The $0.3 millionincrease in the allowance for commercial real estate loan losses during the first three months of 2018 was primarily driven by originated loan growth of $61.0 million, or 2.1%, from December 31, 2017.

The ratio of total criticized and classified commercial real estate loans to total commercial real estate loans decreased to 0.75% as of March 31, 2018 from 0.91% as of December 31, 2017. The ratio of originated commercial real estate loans on nonaccrual to total originated commercial real estate loans increased to 0.18% as of March 31, 2018 from 0.16% as of December 31, 2017.

Net charge-offs in the commercial real estate loan portfolio totaled $3.0 thousand for the three months ended March 31, 2018 compared to net recoveries of $116.0 thousand for the three month ended March 31, 2017. As a percentage of average commercial real estate loan portfolio, annualized net charge-offs for the three months ended March 31, 2018 was less than a basis point and annualized net recoveries for the three months ended March 31, 2017 was 0.02%.

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Commercial Loans and Leases

The allowance for commercial loan and lease losses was $26.3 million, or 1.54% of total commercial loans and leases outstanding, as of March 31, 2018, compared to $26.3 million, or 1.62% of total commercial loans and leases outstanding, as of December 31, 2017. Specific reserves on commercial loans and leases decreased from $3.1 million as of December 31, 2017 to $2.5 million as of March 31, 2018. The $81.0 thousanddecrease in the allowance for commercial loans and lease losses during 2018 was primarily due to a decrease in the specific reserves for a taxi medallion relationship as a result of a change in its underlying collateral value, and charge-offs taken during the quarter, offset by the originated loan growth of 56.7 million, or 3.5%, from December 31, 2017.  

The ratio of total criticized and classified commercial loans and leases to total commercial loans and leases was 2.67% as of March 31, 2018, compared to 2.47% as of December 31, 2017. The ratio of originated commercial loans and leases on nonaccrual to total originated commercial loans and leases decreased to 0.99% as of March 31, 2018 from 1.15% as of December 31, 2017.

Net charge-offs in the commercial loan and lease portfolio for the three months ended March 31, 2018 and March 31, 2017 were $0.5 million and $1.1 million, respectively. As a percentage of average commercial loans and leases, annualized net charge-offs for the three months ended March 31, 2018 and March 31, 2017 were 0.12% and 0.28%, respectively.

As a component of net charge-offs in the commercial loan and lease portfolio for the three months ended March 31, 2018 and March 31, 2017, there were net charge-offs related to taxi medallion loans of $0.2 million and zero, respectively.

Consumer Loans

The allowance for consumer loan losses, including residential loans and home equity loans and lines of credit, was $5.1 million, or 0.44% of total consumer loans outstanding, as of March 31, 2018, compared to $5.1 million, or 0.50% of consumer loans outstanding, as of December 31, 2017. Specific reserves on consumer loans were $40.0 thousand and $22.0 thousand as of March 31, 2018 and December 31, 2017, respectively. The allowance for consumer loans remained steady during the first three months of 2018 despite of the originated loan growth of $23.9 million, or 2.6%, from December 31, 2017.

The ratio of originated consumer loans on nonaccrual to total originated consumer loans increased to 0.22% as of March 31, 2018 from 0.21% as of December 31, 2017. The risk of loss on a home equity loan is higher since the property securing the loan has often been previously pledged as collateral for a first mortgage loan. The Company gathers and analyzes delinquency data, to the extent that data are available on these first liens, for purposes of assessing the collectability of the second liens held by the Company even if these home equity loans are not delinquent. This data is further analyzed for performance differences between amortizing and non-amortizing home equity loans, the percentage borrowed to total loan commitment and by the amount of payments made by the borrowers. The loss exposure is not considered to be high due to the combination of current property values, the historically low loan-to-value ratios, the low level of losses experienced in the past few years and the low level of loan delinquencies as of March 31, 2018. If the local economy weakens, however, a rise in losses in those loan classes could occur. Historically, losses in these classes have been low.

Net recoveries in the consumer loan portfolio totaled $30.0 thousand for the three months ended March 31, 2018 compared to net charge-offs of $46.0 thousand for the three months ended March 31, 2017. Provisions for consumer loans recorded in these periods more than adequately covered charge-offs during those periods.

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The following table sets forth the Company's percent of allowance for loan and lease losses to the total allowance for loan and lease losses and the percent of loans to total loans for each of the categories listed at the dates indicated.

	At March 31, 2018						At December 31, 2017
	Amount		Percent of Allowance to Total Allowance		Percent of Loans in Each Category to Total Loans		Amount		Percent of Allowance to Total Allowance		Percent of Loans in Each Category to Total Loans
	(Dollars in Thousands)
Commercial real estate	$	20,450	34.7	%	37.1	%	$	20,089	34.3	%	38.0	%
Multi-family mortgage	5,571		9.5	%	13.0	%	5,667		9.7	%	13.3	%
Construction	1,340		2.3	%	2.8	%	1,356		2.3	%	2.4	%
Total commercial real estate loans	27,361		46.5	%	52.9	%	27,112		46.3	%	53.7	%
Commercial	15,137		25.8	%	12.5	%	15,366		26.2	%	12.3	%
Equipment financing	10,732		18.3	%	14.6	%	10,586		18.1	%	15.1	%
Condominium association	383		0.7	%	0.9	%	381		0.7	%	0.9	%
Total commercial loans and leases	26,252		44.8	%	28.0	%	26,333		45.0	%	28.3	%
Residential mortgage	2,705		4.6	%	12.6	%	2,743		4.7	%	11.5	%
Home equity	2,221		3.8	%	6.0	%	2,219		3.8	%	6.2	%
Other consumer	175		0.3	%	0.5	%	185		0.2	%	0.3	%
Total consumer loans	5,101		8.7	%	19.1	%	5,147		8.7	%	18.0	%
Total	$	58,714	100.0	%	100.0	%	$	58,592	100.0	%	100.0	%

Investment Securities

The investment portfolio exists primarily for liquidity purposes, and secondarily as sources of interest and dividend income, interest-rate risk management and tax planning as a counterbalance to loan and deposit flows. Investment securities are utilized as part of the Company's asset/liability management and may be sold in response to, or in anticipation of, factors such as changes in market conditions and interest rates, security prepayment rates, deposit outflows, liquidity concentrations and regulatory capital requirements.

The investment policy of the Company, which is reviewed and approved by the Board of Directors on an annual basis, specifies the types of investments that are acceptable, required investment ratings by at least one nationally recognized rating agency, concentration limits and duration guidelines. Compliance with the investment policy is monitored on a regular basis. In general, the Company seeks to maintain a high degree of liquidity and targets cash, cash equivalents and investment securities available-for-sale balances between 10% and 30% of total assets.

Cash, cash equivalents, and investment securities increased$49.3 million, or 27.7% on an annualized basis, to $760.2 million as of March 31, 2018 from $710.9 million as of December 31, 2017. The increase was primarily driven by increases in deposit balances, loans and leases, and investment securities. Cash, cash equivalents, and investment securities were 10.5% of total assets as of March 31, 2018, compared to 10.5% of total assets at December 31, 2017.

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The following table sets forth certain information regarding the amortized cost and market value of the Company's investment securities at the dates indicated:

	At March 31, 2018				At December 31, 2017
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
	(In Thousands)
Investment securities available-for-sale:
GSE debentures	$	184,760	$	180,968	$	151,483	$	149,924
GSE CMOs	125,061		119,697		131,082		127,022
GSE MBSs	197,083		192,185		191,281		189,313
SBA commercial loan asset- backed securities	70		69		73		72
Corporate debt obligations	56,784		55,872		62,811		62,683
U.S. Treasury bonds	8,794		8,597		8,785		8,730
Trust preferred securities	—		—		1,471		1,398
Total debt securities	572,552		557,388		546,986		539,142
Marketable equity securities	980		969		978		982
Total investment securities available-for-sale	$	573,532	$	558,357	$	547,964	$	540,124
Investment securities held-to-maturity:
GSE debentures	$	50,529	$	49,175	$	41,612	$	40,801
GSE MBSs	13,344		13,004		13,923		13,705
Municipal obligations	52,979		52,134		53,695		53,517
Foreign government obligations	500		497		500		500
Total investment securities held-to-maturity	$	117,352	$	114,810	$	109,730	$	108,523

The fair value of investment securities is based principally on market prices and dealer quotes received from third-party, nationally-recognized pricing services for identical investment securities such as U.S. Treasury and agency securities. The Company's marketable equity securities are priced this way and are included in Level 1. These prices are validated by comparing the primary pricing source with an alternative pricing source when available. When quoted market prices for identical securities are unavailable, the Company uses market prices provided by independent pricing services based on recent trading activity and other observable information, including but not limited to market interest-rate curves, referenced credit spreads and estimated prepayment speeds where applicable. These investments include certain U.S. and government agency debt securities, municipal and corporate debt securities, GSE residential MBSs and CMOs, and trust preferred securities, all of which are included in Level 2. Certain fair values are estimated using pricing models and are included in Level 3.

Additionally, management reviews changes in fair value from period to period and performs testing to ensure that prices received from the third parties are consistent with their expectation of the market. Changes in the prices obtained from the pricing service are analyzed from month to month, taking into consideration changes in market conditions including changes in mortgage spreads, changes in U.S. Treasury security yields and changes in generic pricing of 15-year and 30-year securities. Additional analysis may include a review of prices provided by other independent parties, a yield analysis, a review of average life changes using Bloomberg analytics and a review of historical pricing for the particular security.

Maturities, calls and principal repayments for investment securities available-for-sale totaled $21.6 million for the three months endedMarch 31, 2018 compared to $19.6 million for the same period in 2017. For the three months endedMarch 31, 2018, the Company sold 1.5 million for investment securities, compared to none for the same period in 2017. For the three months endedMarch 31, 2018, the Company purchased $49.1 million of investment securities available-for-sale, compared to $23.9 million in purchases of investment securities available-for-sale for the same period in 2017.

Maturities, calls and principal repayments for investment securities held-to-maturity totaled $1.2 million for the three months endedMarch 31, 2018 compared to $1.3 million for the same period in 2017. There were no sales of investment securities held-to-maturity for the three months endedMarch 31, 2018 and 2017. For the three months endedMarch 31, 2018, the Company purchased $8.9 million of investment securities held-to-maturity, compared to $14.9 million in purchases of investment securities held-to-maturity for the same period in 2017.

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As of March 31, 2018, the fair value of all investment securities available-for-sale was $558.4 million and carried a total of $15.2 million of net unrealized losses, compared to a fair value of $540.1 million and net unrealized losses of $7.8 million as of December 31, 2017. As of March 31, 2018, $512.1 million, or 91.7%, of the portfolio, had gross unrealized losses of $15.5 million. This compares to $469.2 million, or 86.9%, of the portfolio with gross unrealized losses of $8.4 million as of December 31, 2017. The Company's unrealized loss position has increased in 2018 driven by higher long-term interest rates.

As of March 31, 2018, the fair value of all investment securities held-to-maturity was $114.8 million and carried a total of $2.5 million of net unrealized losses, compared to a fair value of $108.5 million and net unrealized losses of $1.2 million as of December 31, 2017. As of March 31, 2018, $109.0 million, or 95.0%, of the portfolio, had gross unrealized losses of $2.6 million. This compares to $92.9 million, or 85.6%, of the portfolio with gross unrealized losses of $1.4 million as of December 31, 2017. The Company's unrealized loss position increased in 2018 driven by higher long-term interest rates.

Management believes that these negative differences between amortized cost and fair value do not include credit losses, but rather differences in interest rates between the time of purchase and the time of measurement. It is more likely than not that the Company will not sell or be required to sell the investment securities before recovery, and, as a result, it will recover the amortized cost basis of the investment securities. As such, management has determined that the securities are not other-than-temporarily impaired as of March 31, 2018. If market conditions for securities worsen or the creditworthiness of the underlying issuers deteriorates, it is possible that the Company may recognize additional other-than-temporary impairments in future periods. For additional discussion on how the Company validates fair values provided by the third-party pricing service, see Note 11, “Fair Value of Financial Instruments.”

Restricted Equity Securities

FHLBB Stock—The Company invests in the stock of the FHLBB as one of the requirements to borrow. The Company maintains an excess balance of capital stock, which allows for additional borrowing capacity at each of the Banks. As of March 31, 2018, the excess balance of capital stock is $2.4 million, as compared to an excess balance of $0.3 million at December 31, 2017.

As of March 31, 2018, the Company owned stock in the FHLBB with a carrying value of $48.2 million, an increase of $5.8 million from $42.4 million as of December 31, 2017. As of March 31, 2018, the FHLBB had total assets of $61.0 billion and total capital of $3.3 billion, of which $1.3 billion was retained earnings. The FHLBB stated that it remained in compliance with all regulatory capital ratios as of March 31, 2018 and was classified as "adequately capitalized" by its regulator, based on the FHLBB's financial information as of December 31, 2017.

Federal Reserve Bank Stock—The Company invests in the stock of the Federal Reserve Bank of Boston, as a condition of the membership for the Banks in the Federal Reserve System. As of March 31, 2018 the Company owned stock in the Federal Reserve Bank of Boston with a carrying value of $17.8 million, compare to a carrying value of $16.8 million at December 31,2017.

Other Stock—The Company invests in a small number of other restricted equity securities which includes Infinex and American Financial Exchange.

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Deposits

The following table presents the Company's deposit mix at the dates indicated.

	At March 31, 2018						At December 31, 2017
	Amount		Percent of Total		Weighted Average Rate		Amount		Percent of Total		Weighted Average Rate
	(Dollars in Thousands)
Non-interest-bearing deposits:
Demand checking accounts	$	987,153	19.0	%	—	%	$	942,583	19.3	%	—	%
Interest-bearing deposits:
NOW accounts	342,374		6.6	%	0.06	%	350,568		7.2	%	0.07	%
Savings accounts	637,920		12.3	%	0.25	%	646,359		13.3	%	0.25	%
Money market accounts	1,862,351		35.9	%	0.62	%	1,724,363		35.4	%	0.56	%
Certificate of deposit accounts	1,361,722		26.2	%	1.38	%	1,207,470		24.8	%	1.27	%
Total interest-bearing deposits	4,204,367		81.0	%	0.75	%	3,928,760		80.7	%	0.68	%
Total deposits	$	5,191,520	100.0	%	0.60	%	$	4,871,343	100.0	%	0.55	%

Total deposits increased$320.2 million, to $5.2 billion as of March 31, 2018, compared to $4.9 billion as of December 31, 2017. Deposits as a percentage of total assets decreased to 71.6% as of March 31, 2018, as compared to 71.8% as of December 31, 2017. Excluding the First Commons Bank acquired deposits at fair value, deposits increased $46.5 million during the quarter.

As of March 31, 2018, the Company had $278.8 million of brokered deposits compared to $274.7 million as of December 31, 2017. Brokered deposits allow the Company to seek additional funding by attracting deposits from outside the Company's core market. The Company's investment policy limits the amount of brokered deposits to 15% of total assets. Brokered deposits are included in the certificate of deposit balance, which increased$154.3 million during the three months endedMarch 31, 2018. Certificates of deposit have also increased as a percentage of total deposits to 26.2% as of March 31, 2018 from 24.8% as of December 31, 2017.

During the three months endedMarch 31, 2018, core deposits increased$165.9 million. The ratio of core deposits to total deposits decreased from 75.2% as of December 31, 2017 to 73.8% as of March 31, 2018, primarily due to the shift in deposit mix and increase in brokered deposits.

The following table sets forth the distribution of the average balances of the Company's deposit accounts for the periods indicated and the weighted average interest rates on each category of deposits presented. Averages for the periods presented are based on daily balances.

	Three Months Ended March 31,
	2018						2017
	Average Balance		Percent of Total Average Deposits		Weighted Average Rate		Average Balance		Percent of Total Average Deposits		Weighted Average Rate
	(Dollars in Thousands)
Core deposits:
Non-interest-bearing demand checking accounts	$	931,685	18.9	%	—	%	$	898,481	19.5	%	—	%
NOW accounts	335,990		6.8	%	0.07	%	320,671		7.0	%	0.07	%
Savings accounts	649,224		13.2	%	0.25	%	614,085		13.4	%	0.20	%
Money market accounts	1,772,362		35.8	%	0.59	%	1,744,534		37.9	%	0.47	%
Total core deposits	3,689,261		74.7	%	0.33	%	3,577,771		77.8	%	0.27	%
Certificate of deposit accounts	1,247,049		25.3	%	1.33	%	1,021,949		22.2	%	1.07	%
Total deposits	$	4,936,310	100.0	%	0.72	%	$	4,599,720	100.0	%	0.44	%

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As of March 31, 2018 and December 31, 2017, the Company had outstanding certificates of deposit of $100,000 or more, maturing as follows:

	At March 31, 2018				At December 31, 2017
	Amount		Weighted Average Rate		Amount		Weighted Average Rate
	(Dollars in Thousands)
Maturity period:
Six months or less	$	176,105	1.16	%	$	157,263	0.96	%
Over six months through 12 months	193,370		1.49	%	134,297		1.08	%
Over 12 months	299,277		1.79	%	244,348		1.73	%
Total certificate of deposit of $100,000 or more	$	668,752	1.54	%	$	535,908	1.34	%

Borrowed Funds

The following table sets forth certain information regarding advances from the FHLBB, subordinated debentures and notes and other borrowed funds for the periods indicated:

	Three Months Ended   March 31,
	2018			2017
	(Dollars in Thousands)
Borrowed funds:
Average balance outstanding	$	1,075,734		$	1,073,580
Maximum amount outstanding at any month-end during the period	1,099,429			1,077,459
Balance outstanding at end of period	1,099,429			1,056,785
Weighted average interest rate for the period	1.88		%	1.55		%
Weighted average interest rate at end of period	2.05		%	1.65		%

Advances from the FHLBB

On a long-term basis, the Company intends to continue to increase its core deposits. The Company also uses FHLBB borrowings and other wholesale borrowing as part of the Company's overall strategy to fund loan growth and manage interest-rate risk and liquidity. The advances are secured by a blanket security agreement which requires the Banks to maintain certain qualifying assets as collateral, principally mortgage loans and securities in an aggregate amount at least equal to outstanding advances. The maximum amount that the FHLBB will advance to member institutions, including the Company, fluctuates from time to time in accordance with the policies of the FHLBB. The Company may also borrow from the FRB's "discount window" as necessary.

FHLBB borrowings increased by $92.5 million to $982.5 million as of March 31, 2018 from the December 31, 2017 balance of $889.9 million. The increase in FHLBB borrowings was primarily due to an increase in new advances from the FHLBB to fund loan growth. The increase in FHLBB borrowings was partly due to $5.0 million of additional borrowings acquired with First Commons Bank.

Subordinated Debentures and Notes

The Company acquired two $5.0 million subordinated debentures due on June 26, 2033 and March 17, 2034, respectively. The Company is obligated to pay 3-month LIBOR plus 3.10% and 3-month LIBOR plus 2.79%, respectively, on a quarterly basis until the debentures mature.

The Company sold $75.0 million of 6.0% fixed-to-floating subordinated notes due September 15, 2029. The Company is obligated to pay 6.0% interest semiannually between September 2014 and September 2024. Subsequently, the Company is obligated to pay 3-month LIBOR plus 3.315% quarterly until the notes mature in September 2029.

The following table summarizes the Company's subordinated debentures and notes at the dates indicated.

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				Carrying Amount
Issue Date	Rate	Maturity Date	Next Call Date	March 31, 2018		December 31, 2017
	(Dollars in Thousands)
June 26, 2003	Variable; 3-month LIBOR + 3.10%	June 26, 2033	June 26, 2018	$	4,784	$	4,778
March 17, 2004	Variable; 3-month LIBOR + 2.79%	March 17, 2034	June 18, 2018	4,677		4,668
September 15, 2014	6.0% Fixed-to-Variable; 3-month LIBOR + 3.315%	September 15, 2029	September 15, 2024	73,850		73,825
			Total	$	83,311	$	83,271

The above carrying amounts of the subordinated debentures included $0.5 million of accretion adjustments and $1.1 million of capitalized debt issuance costs as of March 31, 2018. This compares to $0.6 million of accretion adjustments and $1.2 million of capitalized debt issuance costs as of December 31, 2017.

Other Borrowed Funds

In addition to advances from the FHLBB and subordinated debentures and notes, the Company utilizes other funding sources as part of the overall liquidity strategy. Those funding sources include repurchase agreements, and committed and uncommitted lines of credit with several financial institutions.

The Company periodically enters into repurchase agreements with its larger deposit and commercial customers as part of its cash management services which are typically overnight borrowings. Repurchase agreements with customers decreased$4.0 million to $33.6 million as of March 31, 2018 from $37.6 million as of December 31, 2017.

The Company has access to a $12.0 million committed line of credit as of March 31, 2018. As of March 31, 2018 and December 31, 2017, the Company did not have any borrowings on this committed line of credit outstanding.

The Banks also have access to funding through several uncommitted lines of credit of $198.0 million. As of March 31, 2018 , the Company did not have any borrowings on these uncommitted lines of credit as compared to December 31, 2017, when the Company had $10.0 million in borrowings on the uncommitted lines.

Derivative Financial Instruments

The Company has entered into loan level derivatives, risk participation agreements, and foreign exchange contracts with certain of its commercial customers and concurrently enters into offsetting swaps with third-party financial institutions. The Company may also, from time to time, enter into risk participation agreements. The Company did not have derivative fair value hedges or derivative cash flow hedges at March 31, 2018 or December 31, 2017.

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The following table summarizes certain information concerning the Company's loan level derivatives, risk participation agreements, and foreign exchange contracts at March 31, 2018 and December 31, 2017:

	At March 31, 2018			At December 31, 2017
	(Dollars in Thousands)
Loan level derivatives (Notional principal amounts):
Receive fixed, pay variable	$	537,694		$	494,659
Pay fixed, receive variable	537,694			494,659
Risk participation-out agreements	37,162			36,627
Risk participation-in agreements	3,825			3,825
Foreign exchange contracts (Notional amounts):
Buys foreign currency, sells U.S. currency	$	1,330		$	1,495
Sells foreign currency, buys U.S. currency	1,335			1,502
Fixed weighted average interest rate from the Company to counterparty	4.21		%	4.17		%
Floating weighted average interest rate from counterparty to the Company	3.83		%	3.19		%
Weighted average remaining term to maturity (in months)	87			81
Fair value:
Recognized as an asset:
Loan level derivatives	$	13,594		$	8,865
Risk participation-out agreements	43			65
Foreign exchange contracts	65			72
Recognized as a liability:
Loan level derivatives	$	13,594		$	8,865
Risk participation-in agreements	7			10
Foreign exchange contracts	60			65

Stockholders' Equity and Dividends

The Company's total stockholders' equity was $865.8 million as of March 31, 2018, representing a $61.9 millionincrease compared to $803.8 million at December 31, 2017. The increase primarily reflects net income attributable to the Company of $18.6 million for the three months endedMarch 31, 2018, an increase of $55.2 million related to acquisition of First Commons Bank, which was partially offset by an unrealized loss on securities available-for-sale of $5.7 million, and dividends paid by the Company of $6.9 million in that same period.

Stockholders' equity represented 11.94% of total assets as of March 31, 2018 and 11.86% of total assets as of December 31, 2017. Tangible stockholders' equity (total stockholders' equity less goodwill and identified intangible assets, net) represented 9.85% of tangible assets (total assets less goodwill and identified intangible assets, net) as of March 31, 2018 and 9.94% as of December 31, 2017.

The dividend payout ratio was 37.11% for the three months ended March 31, 2018, compared to 47.23% for the same period of 2017.

Results of Operations

The primary drivers of the Company's net income are net interest income, which is strongly affected by the net yield on and growth of interest-earning assets and liabilities ("net interest margin"), the quality of the Company's assets, its levels of non-interest income and non-interest expense, and its tax provision.

The Company's net interest income represents the difference between interest income earned on its investments, loans and leases, and its cost of funds. Interest income is dependent on the amount of interest-earning assets outstanding during the period and the yield earned thereon. Cost of funds is a function of the average amount of deposits and borrowed money outstanding during the year and the interest rates paid thereon. The net interest margin is calculated by dividing net interest income by average interest-earning assets. Net interest spread is the difference between the average rate earned on interest-earning assets and the average rate paid on interest-bearing liabilities. The increases or decreases, as applicable, in the

77

components of interest income and interest expense, expressed in terms of fluctuation in average volume and rate, are summarized under "Rate/Volume Analysis" below. Information as to the components of interest income, interest expense and average rates is provided under "Average Balances, Net Interest Income, Interest-Rate Spread and Net Interest Margin" below.

Because the Company's assets and liabilities are not identical in duration and in repricing dates, the differential between the two is vulnerable to changes in market interest rates as well as the overall shape of the yield curve. These vulnerabilities are inherent to the business of banking and are commonly referred to as "interest-rate risk." How interest-rate risk is measured and, once measured, how much interest-rate risk is taken are based on numerous assumptions and other subjective judgments. See the discussion in “Item 3. Quantitative and Qualitative Disclosures about Market Risk” below.

The quality of the Company's assets also influences its earnings. Loans and leases that are not paid on a timely basis and exhibit other weaknesses can result in the loss of principal and/or interest income. Additionally, the Company must make timely provisions to the allowance for loan and lease losses based on estimates of probable losses inherent in the loan and lease portfolio. These additions, which are charged against earnings, are necessarily greater when greater probable losses are expected. Further, the Company incurs expenses as a result of resolving troubled assets. These variables reflect the "credit risk" that the Company takes on in the ordinary course of business and are further discussed under "Financial Condition—Asset Quality" above.

Net Interest Income

Net interest income increased$6.4 million to $59.5 million for the three months ended March 31, 2018 from $53.1 million for the three months ended March 31, 2017. This overall increase reflects an $8.7 millionincrease in interest income on loans and leases and a $0.3 millionincrease in interest income on investment securities, offset by a $2.9 million increase in interest expense on deposit and borrowings, which is reflective of the various portfolios repricing and replacing balances into the current interest rate environment. Refer to “Results of Operations - Comparison of the Three-Month Period Ended March 31, 2018 and March 31, 2017 — Interest Income” and “Results of Operations - Comparison of the Three-Month Period Ended March 31, 2018 and March 31, 2017 — Interest Expense Deposit and Borrowed Funds” below for more details.

Net interest margin increased by 13 basis points to 3.66% for the three months ended March 31, 2018 from 3.53% for the three months ended March 31, 2017. The Company's weighted average interest rate on loans (prior to purchase accounting adjustments) increased to 4.60% for the three months ended March 31, 2018 from 4.33% for the three months ended March 31, 2017. Interest amortization and accretion on acquired loans was minimal and did not contribute any basis point to loan yields during the three months ended March 31, 2018 compared to $0.2 million, or 1 basis points, for the three months ended March 31, 2017. The increase in the net interest margin is the result of repricing interest-earning assets in a slightly higher rate environment offset by a comparable increase in funding costs.

The yield on interest-earning assets increased to 4.35% for the three months ended March 31, 2018 from 4.08% for the three months ended March 31, 2017. This increase is the result of higher yields on loans and leases, partially offset by a decrease in prepayment penalties and late charges. During the three months ended March 31, 2018, the Company recorded $0.6 million in prepayment penalties and late charges, which contributed 4 basis points to yields on interest-earning assets in the three months ended March 31, 2018, compared to $0.8 million, or 5 basis points, for the three months ended March 31, 2017.

The overall cost of funds (including non-interest-bearing demand checking accounts) increased15 basis points to 0.81% for the three months ended March 31, 2018 from 0.66% for the three months ended March 31, 2017. Refer to "Financial Condition - Borrowed Funds" above for more details.

Management seeks to position the balance sheet to be neutral to asset sensitive to changes in interest rates. Since the end of 2016, short term interest rates have risen while at the same time net interest income, net interest spread, and net interest margin have also increased. In general, the Company's balance sheet position should respond positively in a rising interest rate environment and when the rate curves are steepening which should result in a positive impact to net interest income, net interest spread, and the net interest margin. A declining interest rate or flattening yield curve environment is expected to have a negative impact on the Company's yields and net interest margin. Additional risk factors include, but are not limited to: ongoing pricing pressures in both the loan and deposit portfolios, the ability to increase the Company's core deposits, decrease its loan-to-deposit ratio, and decrease its reliance on FHLBB advances. Net interest income may also be negatively affected by changes in the amount of accretion on acquired loans and leases, deposits and borrowed funds, which are included in interest income and interest expense, respectively.

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Average Balances, Net Interest Income, Interest-Rate Spread and Net Interest Margin

The following table sets forth information about the Company's average balances, interest income and interest rates earned on average interest-earning assets, interest expense and interest rates paid on average interest-bearing liabilities, interest-rate spread and net interest margin for the three months endedMarch 31, 2018 and March 31, 2017. Average balances are derivedfrom daily average balances and yields include fees, costs and purchase-accounting-related premiums and discounts which are considered adjustments to coupon yields in accordance with GAAP. Certain amounts previously reported have been reclassified to conform to the current presentation.

	Three Months Ended
	March 31, 2018							March 31, 2017
	Average Balance			Interest (1)		Average Yield/ Cost		Average Balance			Interest (1)		Average Yield/ Cost
	(Dollars in Thousands)
Assets:
Interest-earning assets:
Debt securities	$	647,501		$	3,377	2.09	%	$	613,520		$	3,110	2.03	%
Marketable and restricted equity securities	64,127			923		5.76	%	69,508			718		4.13	%
Short-term investments	30,664			120		1.57	%	32,127			67		0.84	%
Total investments	742,292			4,420		2.38	%	715,155			3,895		2.18	%
Commercial real estate loans (2)	3,116,690			33,429		4.29	%	2,930,345			29,467		4.02	%
Commercial loans (2)	785,936			8,424		4.29	%	699,687			7,113		4.07	%
Equipment financing (2)	875,304			14,864		6.79	%	806,139			13,114		6.51	%
Residential mortgage loans (2)	704,666			6,733		3.82	%	634,885			5,609		3.53	%
Other consumer loans (2)	382,194			3,941		4.18	%	360,791			3,495		3.93	%
Total loans and leases	5,864,790			67,391		4.60	%	5,431,847			58,798		4.33	%
Total interest-earning assets	6,607,082			71,811		4.35	%	6,147,002			62,693		4.08	%
Allowance for loan and lease losses	(58,986		)					(54,314		)
Non-interest-earning assets	379,213							368,495
Total assets	$	6,927,309						$	6,461,183
Liabilities and Stockholders' Equity:
Interest-bearing liabilities:
Interest-bearing deposits:
NOW accounts	$	335,990		58		0.07	%	$	320,671		55		0.07	%
Savings accounts	649,224			401		0.25	%	614,085			310		0.20	%
Money market accounts	1,772,362			2,558		0.59	%	1,744,534			2,009		0.47	%
Certificate of deposit	1,247,049			4,082		1.33	%	1,021,949			2,706		1.07	%
Total interest-bearing deposits (3)	4,004,625			7,099		0.72	%	3,701,239			5,080		0.56	%
Advances from the FHLBB	956,298			3,748		1.57	%	929,822			2,857		1.23	%
Subordinated debentures and notes	83,289			1,282		6.16	%	83,124			1,260		6.07	%
Other borrowed funds	36,147			19		0.21	%	60,634			56		0.38	%
Total borrowed funds	1,075,734			5,049		1.88	%	1,073,580			4,173		1.55	%
Total interest-bearing liabilities	5,080,359			12,148		0.97	%	4,774,819			9,253		0.79	%
Non-interest-bearing liabilities:
Non-interest-bearing demand checking accounts (3)	931,685							898,481
Other non-interest-bearing liabilities	77,169							71,812
Total liabilities	6,089,213							5,745,112
Brookline Bancorp, Inc. stockholders' equity	829,598							709,095
Noncontrolling interest in subsidiary	8,498							6,976
Total liabilities and stockholders' equity	$	6,927,309						$	6,461,183
Net interest income (tax-equivalent basis) / Interest-rate spread (4)				59,663		3.38	%				53,440		3.29	%
Less adjustment of tax-exempt income				172							342
Net interest income				$	59,491						$	53,098
Net interest margin (5)						3.66	%						3.53	%

_________________________________________________________________________

(1) Tax-exempt income on debt securities, equity securities and industrial revenue bonds are included in commercial real estate loans on a tax-equivalent basis.

(2) Loans on nonaccrual status are included in the average balances.

(3) Including non-interest-bearing checking accounts, the average interest rate on total deposits was 0.58% and 0.45% in the three months ended March 31, 2018 and March 31, 2017, respectively.

(4) Interest-rate spread represents the difference between the yield on interest-earning assets and the cost of interest-bearing liabilities.

(5) Net interest margin represents net interest income (tax equivalent basis) divided by average interest-earning assets.

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Rate/Volume Analysis

The following table presents, on a tax-equivalent basis, the extent to which changes in interest rates and changes in volume of interest-earning assets and interest-bearing liabilities have affected the Company's interest income and interest expense during the periods indicated. Information is provided in each category with respect to: (i) changes attributable to changes in volume (changes in volume multiplied by prior rate), (ii) changes attributable to changes in rate (changes in rate multiplied by prior volume), and (iii) the net change. The changes attributable to the combined impact of volume and rate have been allocated proportionately to the changes due to volume and the changes due to rate.

	Three Months Ended March 31, 2018 as Compared to the Three Months Ended March 31, 2017
	Increase (Decrease) Due To
	Volume			Rate			Net Change
	(In Thousands)
Interest and dividend income:
Investments:
Debt securities	$	174		$	93		$	267
Marketable and restricted equity securities	(58		)	263			205
Short-term investments	(3		)	56			53
Total investments	113			412			525
Loans and leases:
Commercial real estate loans	1,927			2,035			3,962
Commercial loans and leases	911			400			1,311
Equipment financing	1,166			584			1,750
Residential mortgage loans	643			481			1,124
Other consumer loans	215			231			446
Total loans	4,862			3,731			8,593
Total change in interest and dividend income	4,975			4,143			9,118
Interest expense:
Deposits:
NOW accounts	3			—			3
Savings accounts	17			74			91
Money market accounts	32			517			549
Certificate of deposit	654			722			1,376
Total deposits	706			1,313			2,019
Borrowed funds:
Advances from the FHLBB	83			808			891
Subordinated debentures and notes	3			19			22
Other borrowed funds	(18		)	(19		)	(37		)
Total borrowed funds	68			808			876
Total change in interest expense	774			2,121			2,895
Change in tax-exempt income	(170		)	—			(170		)
Change in net interest income	$	4,371		$	2,022		$	6,393

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Interest Income

Loans and Leases

	Three Months Ended March 31,				Dollar Change		Percent Change
	2018		2017
	(Dollars in Thousands)
Interest income—loans and leases:
Commercial real estate loans	$	33,430	$	29,466	$	3,964	13.5	%
Commercial loans	8,305		6,874		1,431		20.8	%
Equipment financing	14,864		13,114		1,750		13.3	%
Residential mortgage loans	6,733		5,609		1,124		20.0	%
Other consumer loans	3,940		3,495		445		12.7	%
Total interest income—loans and leases	$	67,272	$	58,558	$	8,714	14.9	%

Interest income from loans and leases was $67.3 million for the three months ended March 31, 2018, and represented a yield on total loans of 4.60%. This compares to $58.6 million of interest on loans and a yield of 4.33% for March 31, 2017. The $8.7 million increase in interest income from loans and leases was attributable to an increase of $4.9 million due to an increase in origination volume and an increase of $3.7 million due to the changes in interest rates.

Accretion on acquired loans and leases was minimal and did not contribute any basis points to the Company's net interest margin for the three months ended March 31, 2018, compared to $0.2 million and 1 basis point for the three months ended March 31, 2017.

Investments

	Three Months Ended March 31,				Dollar Change		Percent Change
	2018		2017
	(Dollars in Thousands)
Interest income—investments:
Debt securities	$	3,323	$	3,000	$	323	10.8	%
Marketable and restricted equity securities	924		726		198		27.3	%
Short-term investments	120		67		53		79.1	%
Total interest income—investments	$	4,367	$	3,793	$	574	15.1	%

Total investment income was $4.4 million for the three months ended March 31, 2018 compared to $3.8 million for the three months ended March 31, 2017. As of March 31, 2018 and 2017, the yield on total investments was 2.4% and 2.2%, respectively. The year over year increase in interest income on investments of $0.6 million, or 15.1%, was driven by a $412.0 thousand increase due to rates and a $113.0 thousand increase due to volume.

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Interest Expense—Deposits and Borrowed Funds

	Three Months Ended March 31,				Dollar Change			Percent Change
	2018		2017
	(Dollars in Thousands)
Interest expense:
Deposits:
NOW accounts	$	58	$	55	$	3		5.5	%
Savings accounts	401		310		91			29.4	%
Money market accounts	2,558		2,009		549			27.3	%
Certificates of deposit	4,082		2,706		1,376			50.8	%
Total interest expense - deposits	7,099		5,080		2,019			39.7	%
Borrowed funds:
Advances from the FHLBB	3,748		2,857		891			31.2	%
Subordinated debentures and notes	1,282		1,260		22			1.7	%
Other borrowed funds	19		56		(37		)	-66.1	%
Total interest expense - borrowed funds	5,049		4,173		876			21.0	%
Total interest expense	$	12,148	$	9,253	$	2,895		31.3	%

Deposits

For the three months ended March 31, 2018, interest expense on deposits increased$2.0 million, or 39.7%, as compared to the same period in 2017. Interest expense increased $1.3 million due to an increase in interest rates and $0.7 million due to the growth in deposits. Purchase accounting accretion on acquired deposits for the three months ended March 31, 2018 was $82.0 thousand and one basis point, compared to no accretion for the three months ended March 31, 2017.

Borrowed Funds

During the three months ended March 31, 2018, interest paid on borrowed funds increased$0.9 million, or 21.0% year over year, primarily driven by an increase in FHLBB borrowings. The cost of borrowed funds increased to 1.88% for the three months ended March 31, 2018 from 1.55% for the three months ended March 31, 2017. The increase in interest expense was driven by an increase of $808.0 thousand due to borrowing rates and an increase of $68.0 thousand due to volume. For the three months ended March 31, 2018, there was purchase accounting amortization of $15.0 thousand and no basis points on acquired borrowed funds compared to $0.5 million and three basis points for the three months ended March 31, 2017.

Provision for Credit Losses

The provisions for credit losses are set forth below:

	Three Months Ended March 31,						Dollar			Percent
	2018			2017			Change			Change
	(Dollars in Thousands)
Provision for loan and lease losses:
Commercial real estate	$	252		$	227		$	25		-11.0	%
Commercial	451			13,442			(12,991		)	-96.6	%
Consumer	(76		)	(207		)	131			63.3	%
Total provision for loan and lease losses	627			13,462			(12,835		)	-95.3	%
Unfunded credit commitments	14			(60		)	74			123.3	%
Total provision for credit losses	$	641		$	13,402		$	(12,761	)	-95.2	%

For the three months ended March 31, 2018, the provision for credit losses decreased$12.8 million, or 95.2%, to $0.6 million from $13.4 million for the three months ended March 31, 2017. The decrease in the provision for credit losses for the three months ended March 31, 2018 was primarily driven by lower net charge-offs activity, no additional specific reserves requirement for taxi medallion loans, and less reserves required due to changes in historical loss factors applied to the commercial real estate portfolio during the first quarter of 2018.

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See management’s discussion of “Financial Condition — Allowance for Loan and Lease Losses” and Note 5, “Allowance for Loan and Lease Losses,” to the unaudited consolidated financial statements for a description of how management determined the allowance for loan and lease losses for each portfolio and class of loans.

Non-Interest Income

The following table sets forth the components of non-interest income:

	Three Months Ended March 31,				Dollar Change			Percent Change
	2018		2017
	(Dollars in Thousands)
Deposit fees	$	2,463	$	2,252	$	211		9.4	%
Loan fees	290		261		29			11.1	%
Loan level derivative income, net	866		402		464			115.4	%
Gain on sales of investment securities, net	1,162		11,393		(10,231		)	-89.8	%
Gain on sales of loans and leases held-for-sale	299		353		(54		)	-15.3	%
Other	1,088		1,247		(159		)	-12.8	%
Total non-interest income	$	6,168	$	15,908	$	(9,740	)	-61.2	%

For the three months endedMarch 31, 2018, non-interest income decreased$9.7 million, or 61.2%, to $6.2 million as compared to the same period of 2017. This decrease is primarily due to a $0.2 millionincrease in deposit fees and a $0.5 millionincrease in loan level derivative income, offset by a $10.2 milliondecrease in gain on sales of investment securities.

Deposit fees increased$0.2 million, or 9.4%, to $2.5 million for the three months ended March 31, 2018 from $2.3 million for the same period of 2017, primarily due to growth in deposits, and an increase in foreign exchange activity since the first quarter of 2017.

Loan level derivative income increased$0.5 million, or 115.4%, to $0.9 million for the three months endedMarch 31, 2018 from $0.4 million for the same period of 2017, primarily driven by an increase in loan level derivative transactions completed in the quarter.

Gain on sales of investment securities, net decreased$10.2 million, or 89.8%, to $1.2 million for the three months ended March 31, 2018 from $11.4 million for the same period of 2017, driven by the gain on the sale of Northeast Retirement Stock, Inc. in the first quarter 2017.

Non-Interest Expense

The following table sets forth the components of non-interest expense:

	Three Months Ended March 31,				Dollar Change			Percent Change
	2018		2017
	(Dollars in Thousands)
Compensation and employee benefits	$	22,314	$	19,784	$	2,530		12.8	%
Occupancy	3,959		3,645		314			8.6	%
Equipment and data processing	4,618		4,063		555			13.7	%
Professional services	1,144		1,106		38			3.4	%
FDIC insurance	635		855		(220		)	-25.7	%
Advertising and marketing	1,057		817		240			29.4	%
Amortization of identified intangible assets	467		532		(65		)	-12.2	%
Merger and acquisition expense	2,905		—		2,905			100.0	%
Other	2,839		2,954		(115		)	-3.9	%
Total non-interest expense	$	39,938	$	33,756	$	6,182		18.3	%

83

For the three months ended March 31, 2018, non-interest expense increased$6.2 million, or 18.3%, to $39.9 million as compared to the same period in 2017. This increase is primarily due to the closing of the First Commons Bank acquisition. The increase is due to a $2.5 millionincrease in compensation and employee benefits expense, a $0.6 millionincrease in equipment and data processing expense, and a $2.9 millionincrease in merger and acquisition expense.

The efficiency ratio increased to 60.83% for the three months ended March 31, 2018 from 48.92% for the same period in 2017, primarily driven by First Commons Bank acquisition expense.

Compensation and employee benefits expense increased$2.5 million, or 12.8%, to $22.3 million for the three months ended March 31, 2018, from $19.8 million for the same period in 2017, primarily driven by an increase in employee headcount and incentive plan expenses.

Equipment and data processing expense increased$0.6 million, or 13.7%, to $4.6 million for the three months ended March 31, 2018 from $4.1 million for the same period in 2017, primarily driven by an increase related to core processing, addition of First Commons Bank, along with an increase in cost of additional software licenses and IT professional services for implementation for network security.

Merger and acquisition expense was $2.9 million for the three months ended March 31, 2018, compared to zero for the same period in 2017, due to the closing of the First Commons Bank acquisition.

Provision for Income Taxes

	Three Months Ended March 31,						Dollar Change			Percent Change
	2018			2017
	(Dollars in Thousands)
Income before provision for income taxes	$	25,080		$	21,848		$	3,232		14.8	%
Provision for income taxes	5,652			7,835			(2,183		)	(27.9	)%
Net income, before non-controlling interest in subsidiary	$	19,428		$	14,013		$	5,415		38.6	%
Effective tax rate	22.5		%	35.9		%	N/A			-37.3	%

The Company recorded income tax expense of $5.7 million for the three months ended March 31, 2018, compared to $7.8 million for the three months ended March 31, 2017, representing effective tax rates of 22.5% and 35.9%, respectively. The decrease in the Company's effective tax rate for the three months endedMarch 31, 2018 was due to the enactment of the Tax Reform Act.

In the third quarter of 2017, the Company was notified by the Internal Revenue Service of its intent to examine the Company's 2015 consolidated federal income tax return. Management believes that this examination will conclude during the next 12 months.

Liquidity and Capital Resources

Liquidity

Liquidity is defined as the ability to meet current and future financial obligations of a short-term nature. The Company further defines liquidity as the ability to respond to the needs of depositors and borrowers, as well as to earnings enhancement opportunities, in a changing marketplace. Liquidity management is monitored by an Asset/Liability Committee ("ALCO"), consisting of members of management, which is responsible for establishing and monitoring liquidity targets as well as strategies and tactics to meet these targets.

The primary source of funds for the payment of dividends and expenses by the Company is dividends paid to it by the Banks and Brookline Securities Corp. The primary sources of liquidity for the Banks consist of deposit inflows, loan repayments, borrowed funds, and maturing investment securities.

Deposits, which are considered the most stable source of liquidity, totaled $5.2 billion as of March 31, 2018 and represented 82.5% of total funding (the sum of total deposits and total borrowings), compared to deposits of $4.9 billion, or 82.7% of total funding, as of December 31, 2017. Core deposits, which consist of demand checking, NOW, savings and money market accounts, totaled $3.8 billion as of March 31, 2018 and represented 73.8% of total deposits, compared to core depositsof $3.7 billion, or 75.2% of total deposits, as of December 31, 2017. Additionally, the Company had $278.8 million of brokered deposits as of March 31, 2018, which represented 5.4% of total deposits, compared to $274.7 million or 5.6% of total deposits, as of December 31, 2017. The Company offers attractive interest rates based on market conditions to increase deposits balances, while managing cost of funds.

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Borrowings are used to diversify the Company's funding mix and to support asset growth. When profitable lending and investment opportunities exist, access to borrowings provides a means to grow the balance sheet. Borrowings totaled $1.1 billion as of March 31, 2018, representing 17.5% of total funding, compared to $1.0 billion, or 17.3% of total funding, as of December 31, 2017.

As members of the FHLBB, the Banks have access to both short- and long-term borrowings. As of March 31, 2018 and December 31, 2017, the Company's total borrowing limit from the FHLBB for advances and repurchase agreements was $1.5 billion based on the level of qualifying collateral available for these borrowings.

As of March 31, 2018, the Banks also have access to funding through certain uncommitted lines of credit of $198.0 million.

The Company had a $12.0 million committed line of credit for contingent liquidity as of March 31, 2018. As of March 31, 2018, the Company did not have any borrowings on this committed line of credit outstanding.

The Company has access to the Federal Reserve Bank "discount window" to supplement its liquidity. The Company has $77.8 million of borrowing capacity at the Federal Reserve Bank as of March 31, 2018. As of March 31, 2018, the Company did not have any borrowings with the Federal Reserve Bank outstanding.

Additionally, the Banks have access to liquidity through repurchase agreements and brokered deposits.

In general, the Company seeks to maintain a high degree of liquidity and targets cash, cash equivalents and investment securities available-for-sale balances of between 10% and 30% of total assets. As of March 31, 2018, cash, cash equivalents and investment securities available-for-sale totaled $642.8 million, or 8.9% of total assets. This compares to $601.1 million, or 8.9% of total assets as of December 31, 2017.

While management believes that the Company has adequate liquidity to meet its commitments and to fund the Banks' lending and investment activities, the availabilities of these funding sources are subject to broad economic conditions and could be restricted in the future. Such restrictions would impact the Company's immediate liquidity and/or additional liquidity needs.

Off-Balance-Sheet Financial Instruments

The Company is party to off-balance-sheet financial instruments in the normal course of business to meet the financing needs of its customers and to reduce its own exposure to fluctuations in interest rates. These financial instruments include loan commitments, standby and commercial letters of credit and interest-rate swaps. According to GAAP, these financial instruments are not recorded in the financial statements until they are funded or related fees are incurred or received.

The contract amounts reflect the extent of the involvement the Company has in particular classes of these instruments. Such commitments involve, to varying degrees, elements of credit risk and interest-rate risk in excess of the amount recognized in the consolidated balance sheet. The Company’s exposure to credit loss in the event of non-performance by the counterparty is represented by the contractual amount of the instruments. The Company uses the same policies in making commitments and conditional obligations as it does for on-balance-sheet instruments.

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Financial instruments with off-balance-sheet risk at the dates indicated follow:

	At March 31, 2018		At December 31, 2017
	(In Thousands)
Financial instruments whose contract amounts represent credit risk:
Commitments to originate loans and leases:
Commercial real estate	$	34,112	$	76,653
Commercial	106,956		83,032
Residential mortgage	24,162		28,745
Unadvanced portion of loans and leases	608,440		571,668
Unused lines of credit:
Home equity	435,594		407,552
Other consumer	29,730		34,191
Other commercial	336		323
Unused letters of credit:
Financial standby letters of credit	9,972		12,422
Performance standby letters of credit	736		736
Commercial and similar letters of credit	184		184
Loan level derivatives:
Receive fixed, pay variable	537,694		494,659
Pay fixed, receive variable	537,694		494,659
Risk participation-out agreements	37,162		36,627
Risk participation-in agreements	3,825		3,825
Foreign exchange contracts:
Buys foreign currency, sells U.S. currency	1,330		1,495
Sells foreign currency, buys U.S. currency	1,335		1,502

As of March 31, 2018, the Company held no risk participation-in agreements.

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Capital Resources

As of March 31, 2018, the Company and the Banks are each under the primary regulation of, and must comply with, the capital requirements of the FRB. Under these rules, the Company and the Banks are each required to maintain a minimum common equity Tier 1 capital to risk-weighted assets ratio of 4.5%, a minimum total Tier 1 capital to risk-weighted assets ratio of 6.0%, a minimum total capital to risk-weighted assets ratio of 8% and a minimum leverage ratio of 4%. Additionally, subject to a transition schedule, the Company and the Bank are required to establish a capital conservation buffer of common equity Tier 1 capital in an amount above the minimum risk-based capital requirements for “adequately capitalized” institutions equal to 2.5% of total risk weighted assets, or face restrictions on the ability to pay dividends, pay discretionary bonuses, and to engage in share repurchases. As of March 31, 2018, the Company and the Banks exceeded all regulatory capital requirements, and the Banks were each considered “well-capitalized” under prompt corrective action regulations. The following table presents actual and required capital ratios as of March 31, 2018 for the Company and the Banks.

The Company's and the Banks' actual and required capital amounts and ratios were as follows:

	Actual				Minimum Required for Capital Adequacy Purposes				Minimum Required for Fully Phased in Capital Adequacy Purposes plus Capital Conservation Buffer				Minimum Required  to be Considered“Well-Capitalized” Under Prompt Corrective Action Provisions
	Amount		Ratio		Amount		Ratio		Amount		Ratio		Amount		Ratio
	(Dollars in Thousands)
At March 31, 2018:
Brookline Bancorp, Inc.
Common equity Tier 1 capital ratio (1)	$	710,569	12.03	%	$	265,799	4.50	%	$	413,465	7.00	%	N/A		N/A
Tier 1 leverage capital ratio (2)	728,999		10.50	%	277,714		4.00	%	277,714		4.00	%	N/A		N/A
Tier 1 risk-based capital ratio (3)	728,999		12.34	%	354,457		6.00	%	502,147		8.50	%	N/A		N/A
Total risk-based capital ratio (4)	863,235		14.62	%	472,358		8.00	%	619,970		10.50	%	N/A		N/A
Brookline Bank
Common equity Tier 1 capital ratio (1)	$	457,306	11.77	%	$	174,841	4.50	%	$	271,975	7.00	%	$	252,548	6.50	%
Tier 1 leverage capital ratio (2)	466,275		10.93	%	170,640		4.00	%	170,640		4.00	%	213,301		5.00	%
Tier 1 risk-based capital ratio (3)	466,275		12.00	%	233,138		6.00	%	330,278		8.50	%	310,850		8.00	%
Total risk-based capital ratio (4)	507,381		13.06	%	310,800		8.00	%	407,925		10.50	%	388,500		10.00	%
BankRI
Common equity Tier 1 capital ratio (1)	$	198,275	11.39	%	$	78,335	4.50	%	$	121,855	7.00	%	$	113,151	6.50	%
Tier 1 leverage capital ratio (2)	198,275		9.32	%	85,097		4.00	%	85,097		4.00	%	106,371		5.00	%
Tier 1 risk-based capital ratio (3)	198,275		11.39	%	104,447		6.00	%	147,966		8.50	%	139,263		8.00	%
Total risk-based capital ratio (4)	214,647		12.33	%	139,268		8.00	%	182,789		10.50	%	174,085		10.00	%
First Ipswich
Common equity Tier 1 capital ratio (1)	$	38,111	13.59	%	$	12,620	4.50	%	$	19,630	7.00	%	$	18,228	6.50	%
Tier 1 leverage capital ratio (2)	38,111		9.55	%	15,963		4.00	%	15,963		4.00	%	19,953		5.00	%
Tier 1 risk-based capital ratio (3)	38,111		13.59	%	16,826		6.00	%	23,837		8.50	%	22,435		8.00	%
Total risk-based capital ratio (4)	41,019		14.63	%	22,430		8.00	%	29,439		10.50	%	28,038		10.00	%

_______________________________________________________________________________

(1) Common equity Tier 1 capital ratio is calculated by dividing common equity Tier 1 capital by risk-weighted assets.

(2) Tier 1 leverage capital ratio is calculated by dividing Tier 1 capital by average assets.

(3) Tier 1 risk-based capital ratio is calculated by dividing Tier 1 capital by risk-weighted assets.

(4) Total risk-based capital ratio is calculated by dividing total capital by risk-weighted assets.

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The following table presents actual and required capital ratios as of December 31, 2017 for the Company and the Banks under the regulatory capital rules then in effect.

	Actual				Minimum Required for Capital Adequacy Purposes				Minimum Required for Fully Phased in Capital Adequacy Purposes plus Capital Conservation Buffer				Minimum Required To Be Considered “Well-Capitalized” Under Prompt Corrective Action Provisions
	Amount		Ratio		Amount		Ratio		Amount		Ratio		Amount		Ratio
	(Dollars in Thousands)
At December 31, 2017:
Brookline Bancorp, Inc.
Common equity Tier 1 capital ratio (1)	$	669,238	12.02	%	$	250,547	4.50	%	$	389,739	7.00	%	N/A		N/A
Tier 1 leverage capital ratio (2)	687,299		10.43	%	263,585		4.00	%	263,585		4.00	%	N/A		N/A
Tier 1 risk-based capital ratio (3)	687,299		12.34	%	334,181		6.00	%	473,423		8.50	%	N/A		N/A
Total risk-based capital ratio (4)	821,373		14.75	%	445,490		8.00	%	584,706		10.50	%	N/A		N/A
Brookline Bank
Common equity Tier 1 capital ratio (1)	$	414,282	11.56	%	$	161,269	4.50	%	$	250,863	7.00	%	$	232,944	6.50	%
Tier 1 leverage capital ratio (2)	423,035		10.35	%	163,492		4.00	%	163,492		4.00	%	204,365		5.00	%
Tier 1 risk-based capital ratio (3)	423,035		11.81	%	214,920		6.00	%	304,471		8.50	%	286,561		8.00	%
Total risk-based capital ratio (4)	463,986		12.95	%	286,632		8.00	%	376,205		10.50	%	358,290		10.00	%
BankRI
Common equity Tier 1 capital ratio (1)	$	193,849	11.38	%	$	76,654	4.50	%	$	119,239	7.00	%	$	110,722	6.50	%
Tier 1 leverage capital ratio (2)	193,849		9.16	%	84,650		4.00	%	84,650		4.00	%	105,813		5.00	%
Tier 1 risk-based capital ratio (3)	193,849		11.38	%	102,205		6.00	%	144,791		8.50	%	136,273		8.00	%
Total risk-based capital ratio (4)	210,025		12.33	%	136,269		8.00	%	178,853		10.50	%	170,337		10.00	%
First Ipswich
Common equity Tier 1 capital ratio (1)	$	37,502	13.38	%	$	12,613	4.50	%	$	19,620	7.00	%	$	18,218	6.50	%
Tier 1 leverage capital ratio (2)	37,502		9.44	%	15,891		4.00	%	15,891		4.00	%	19,863		5.00	%
Tier 1 risk-based capital ratio (3)	37,502		13.38	%	16,817		6.00	%	23,824		8.50	%	22,423		8.00	%
Total risk-based capital ratio (4)	40,625		14.50	%	22,414		8.00	%	29,418		10.50	%	28,017		10.00	%

_______________________________________________________________________________

(1) Common equity Tier 1 capital ratio is calculated by dividing common equity Tier 1 capital by risk-weighted assets.

(2) Tier 1 leverage capital ratio is calculated by dividing Tier 1 capital by average assets.

(3) Tier 1 risk-based capital ratio is calculated by dividing Tier 1 capital by risk-weighted assets.

(4) Total risk-based capital ratio is calculated by dividing total capital by risk-weighted assets.

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Item 3. Quantitative and Qualitative Disclosures about Market Risk

Market Risk

Market risk is the risk that the market value or estimated fair value of the Company's assets, liabilities, and derivative financial instruments will decline as a result of changes in interest rates or financial market volatility, or that the Company's net income will be significantly reduced by interest-rate changes.

Interest-Rate Risk

The principal market risk facing the Company is interest-rate risk, which can occur in a variety of forms, including repricing risk, yield-curve risk, basis risk, and prepayment risk. Repricing risk occurs when the change in the average yield of either interest-earning assets or interest-bearing liabilities is more sensitive than the other to changes in market interest rates. Such a change in sensitivity could reflect a number of possible mismatches in the repricing opportunities of the Company's assets and liabilities. Yield-curve risk reflects the possibility that changes in the shape of the yield curve could have different effects on the Company's assets and liabilities. Basis risk occurs when different parts of the balance sheet are subject to varying base rates reflecting the possibility that the spread from those base rates will deviate. Prepayment risk is associated with financial instruments with an option to prepay before the stated maturity, often a disadvantage to person selling the option; this risk is most often associated with the prepayment of loans, callable investments, and callable borrowings.

Asset/Liability Management

Market risk and interest-rate risk management is governed by the Company's Asset/Liability Committee ("ALCO"). The ALCO establishes exposure limits that define the Company's tolerance for interest-rate risk. The ALCO and the Company's Treasury Group measure and manage the composition of the balance sheet over a range of possible changes in interest rates while remaining responsive to market demand for loan and deposit products. The ALCO monitors current exposures versus limits and reports those results to the Board of Directors. The policy limits and guidelines serve as benchmarks for measuring interest-rate risk and for providing a framework for evaluation and interest-rate risk-management decision-making. The Company measures its interest-rate risk by using an asset/liability simulation model. The model considers several factors to determine the Company's potential exposure to interest-rate risk, including measurement of repricing gaps, duration, convexity, value-at-risk, market value of portfolio equity under assumed changes in the level of interest rates, the shape of yield curves, and general market volatility.

Management controls the Company's interest-rate exposure using several strategies, which include adjusting the maturities of securities in the Company's investment portfolio, limiting or expanding the terms of loans originated, limiting fixed-rate deposits with terms of more than five years, and adjusting maturities of FHLBB advances. The Company limits this risk by restricting the types of MBSs it invests in to those with limited average life changes under certain interest-rate-shock scenarios, or securities with embedded prepayment penalties. The Company also places limits on holdings of fixed-rate mortgage loans with maturities greater than five years. The Company may also use derivative instruments, principally interest-rate swaps, to manage its interest-rate risk; however, the Company had no derivative fair value hedges or derivative cash flows hedges as of March 31, 2018 or December 31, 2017. See Note 8, “Derivatives and Hedging Activities,” to the unaudited consolidated financial statements.

Measuring Interest-Rate Risk

As noted above, interest-rate risk can be measured by analyzing the extent to which the repricing of assets and liabilities are mismatched to create an interest-rate sensitivity gap. An asset or liability is said to be interest-rate sensitive within a specific period if it will mature or reprice within that period. The interest-rate sensitivity gap is defined as the difference between the amount of interest-earning assets maturing or repricing within a specific time period and the amount of interest-bearing liabilities maturing or repricing within that same time period. A gap is considered positive when the amount of interest-rate-sensitive assets exceeds the amount of interest-rate-sensitive liabilities. A gap is considered negative when the amount of interest-rate-sensitive liabilities exceeds the amount of interest-rate-sensitive assets. During a period of falling interest rates, therefore, a positive gap would tend to adversely affect net interest income. Conversely, during a period of rising interest rates, a positive gap position would tend to result in an increase in net interest income.

The Company's interest-rate risk position is measured using both income simulation and interest-rate sensitivity "gap" analysis. Income simulation is the primary tool for measuring the interest-rate risk inherent in the Company's balance sheet at a given point in time by showing the effect on net interest income, over a twelve-month period, of a variety of interest-rate shocks. These simulations take into account repricing, maturity, and prepayment characteristics of individual products. The ALCO reviews simulation results to determine whether exposure resulting from changes in market interest rates remains within

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established tolerance levels over a twelve-month horizon, and develops appropriate strategies to manage this exposure. The Company's interest-rate risk analysis remains modestly asset-sensitive as of March 31, 2018.

The assumptions used in the Company’s interest-rate sensitivity simulation discussed above are inherently uncertain and, as a result, the simulations cannot precisely measure net interest income or precisely predict the impact of changes in interest rates.

As of March 31, 2018, net interest income simulation indicated that the Company's exposure to changing interest rates was within tolerance. The ALCO reviews the methodology utilized for calculating interest-rate risk exposure and may periodically adopt modifications to this methodology. The following table presents the estimated impact of interest-rate changes on the Company's estimated net interest income over the twelve-month periods indicated:

	Estimated Exposure to Net Interest Income over Twelve-Month Horizon Beginning
	March 31, 2018					December 31, 2017
Gradual Change in Interest Rate Levels	Dollar Change			Percent Change		Dollar Change			Percent Change
	(Dollars in Thousands)
Up 300 basis points	$	11,460		4.6	%	$	11,494		4.9	%
Up 200 basis points	8,142			3.3	%	8,179			3.5	%
Up 100 basis points	4,389			1.8	%	4,434			1.9	%
Down 100 basis points	(10,440		)	-4.2	%	(10,512		)	-4.5	%

The estimated impact of a 300 basis point increase in market interest rates on the Company's estimated net interest income over a twelve-month horizon was a positive 4.6% as of March 31, 2018, compared to a positive 4.9% as of December 31, 2017, the slight decrease in asset sensitivity was due to a change in the funding mix, as core deposits were replaces with whole sale borrowings.

The Company also uses interest-rate sensitivity “gap” analysis to provide a more general overview of its interest-rate risk profile. The interest-rate sensitivity gap is defined as the difference between interest-earning assets and interest-bearing

liabilities maturing or repricing within a given time period. At March 31, 2018, the Company’s one-year cumulative gap was a negative$172.8 million, or 2.4% of total interest-earning assets, compared with a positive$21.0 million, or 0.33% of total interest-earning assets, at December 31, 2017.

The assumptions used in the Company's interest-rate sensitivity simulation discussed above are inherently uncertain and, as a result, the simulations cannot precisely measure net interest income or precisely predict the impact of changes in interest rates. For additional discussion on interest-rate risk see Item 7A, “Quantitative and Qualitative Disclosures about Market Risk” of the Company’s 2017 Annual Report on Form 10-K.

Economic Value of Equity ("EVE") at Risk Simulation is conducted in tandem with net interest income simulations to ascertain a longer term view of the Company’s interest-rate risk position by capturing longer-term repricing risk and options risk embedded in the balance sheet. It measures the sensitivity of the economic value of equity to changes in interest rates. The EVE at Risk Simulation values only the current balance sheet and does not incorporate growth assumptions. As with the net interest income simulation, this simulation captures product characteristics such as loan resets, repricing terms, maturity dates, and rate caps and floors. Key assumptions include loan prepayment speeds, deposit pricing elasticity, and non-maturity deposit attrition rates. These assumptions can have significant impacts on valuation results as the assumptions remain in effect for the entire life of each asset and liability. The Company conducts non-maturity deposit behavior studies on a periodic basis to support deposit assumptions used in the valuation process. All key assumptions are subject to a periodic review.

EVE at Risk is calculated by estimating the net present value of all future cash flows from existing assets and liabilities using current interest rates as well as parallel shocks to the current interest-rate environment. The following table sets forth the estimated percentage change in the Company’s EVE at Risk, assuming various shifts in interest rates. Given the interest rate environment as of March 31, 2018, simulations for interest rate declines of more than 100 basis points were not deemed to be meaningful.

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	Estimated Percent Change in Economic Value of Equity
Parallel Shock in Interest Rate Levels	At March 31, 2018		At December 31, 2017
Up 300 basis points	-2.7	%	-0.7	%
Up 200 basis points	-1.6	%	—	%
Up 100 basis points	—	%	1.0	%
Down 100 basis points	-5.6	%	-7.1	%

The Company's EVE sensitivity for Up shock scenarios increased marginally from December 31, 2017 to March 31, 2018 due to a shortening of deposits, the increase in short wholesale funding, and extension of investment portfolio due to reinvestment of maturing cashflow.

Item 4. Controls and Procedures

Controls and Procedures

Under the supervision and with the participation of the Company’s Management, including the Company’s Chief Executive Officer (Principal Executive Officer) and Chief Financial Officer (Principal Financial Officer), the Company has evaluated the effectiveness of its disclosure controls and procedures (as defined in Rule 13a-15(e) and 15d-15(e) under the Exchange Act) as of the end of the period covered by this report. Based upon that evaluation, the Chief Executive Officer and Chief Financial Officer considered that, as of the end of the period covered by this report, the Company’s disclosure controls and procedures were effective to ensure that information required to be disclosed in the reports that the Company files or submits under the Exchange Act is (i) recorded, processed, summarized and reported, within the time periods specified in the SEC’s rules and forms and (ii) accumulated and communicated to the Company’s Management, including its Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosure.

As a result of the First Commons Bank transaction which closed on March 1, 2018, additional controls were added to the Company’s internal controls over financial reporting. There have been no other control changes in connection with the quarterly evaluation that occurred during the Company’s last fiscal quarter that has materially and detrimentally affected, or is reasonably likely to materially and detrimentally affect, the Company’s internal controls over financial reporting.

The Company’s Management is responsible for establishing and maintaining adequate internal control over financial reporting as such term is defined in Exchange Act Rule 13a -15(f). The Company’s internal control system was designed to provide reasonable assurance to its Management and the Board of Directors regarding the preparation and fair presentation of published financial statements. All internal control systems, no matter how well designed, have inherent limitations. Therefore, even those systems determined to be effective can provide only reasonable assurance with respect to financial statement preparation and presentation. The Company’s Management assessed the effectiveness of its internal control over financial reporting as of the end of the period covered by this report.

Management’s Report on Internal Control Over Financial Reporting as of December 31, 2017 and the related Report of Independent Registered Public Accounting Firm thereon appear on pages F-1 and F-2 of the Company’s Annual Report on Form 10-K for the year ended December 31, 2017.

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PART II — OTHER INFORMATION

Item 1. Legal Proceedings

There are no material pending legal proceedings other than those that arise in the normal course of business. In the opinion of Management, after consulting with legal counsel, the consolidated financial position and results of operations of the Company are not expected to be affected materially by the outcome of such proceedings. 

Item 1A.    Risk Factors

There have been no material changes to the risk factors disclosed in Item 1A of the Company’s Form 10-K for the year ended December 31, 2017.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

a)        Not applicable.

b)        Not applicable.

c)         None.

Item 3. Defaults Upon Senior Securities

a)        None.

b)        None.

Item 4.    Mine Safety Disclosures

Not applicable.

Item 5.    Other Information

None.

Item 6. Exhibits

Exhibits

Exhibit 31.1*	Certification of Chief Executive Officer
Exhibit 31.2*	Certification of Chief Financial Officer
Exhibit 32.1**	Section 1350 Certification of Chief Executive Officer
Exhibit 32.2**	Section 1350 Certification of Chief Financial Officer
Exhibit 101	The following materials from Brookline Bancorp, Inc.’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2018, formatted in XBRL (eXtensible Business Reporting Language): (1) Unaudited Consolidated Balance Sheets as of March 31, 2018 and December 31, 2017; (2) Unaudited Consolidated Statements of Income for the three months March 31, 2018 and March 31, 2017; (3) Unaudited Consolidated Statements of Comprehensive Income for the three months March 31, 2018 and March 31, 2017; (4) Unaudited Consolidated Statements of Changes in Equity for the three months ended March 31, 2018 and March 31, 2017; (5) Unaudited Consolidated Statements of Cash Flows for the three months ended March 31, 2018 and March 31, 2017; and (6) Notes to Unaudited Consolidated Financial Statements at and for the three months ended March 31, 2018 and March 31, 2017.

_______________________________________________________________________________

* Filed herewith

** Furnished herewith

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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.

	BROOKLINE BANCORP, INC.
Date: May 8, 2018	By:	/s/ Paul A. Perrault
		Paul A. Perrault
		President and Chief Executive Officer
		(Principal Executive Officer)
Date: May 8, 2018	By:	/s/ Carl M. Carlson
		Carl M. Carlson
		Chief Financial Officer
		(Principal Financial Officer)

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EX-31.1

Exhibit 31.1

Certification of Chief Executive Officer

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Paul A. Perrault, President and Chief Executive Officer, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Brookline Bancorp, 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 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 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 and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

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

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

Date: May 8, 2018

/s/ PAUL A. PERRAULT

Paul A. Perrault

President and Chief Executive Officer

(Principal Executive Officer)

EX-31.2

Exhibit 31.2 

Certification of Chief Financial Officer

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Carl M. Carlson, Chief Financial Officer, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Brookline Bancorp, 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 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 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 and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

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

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

Date: May 8, 2018

/s/ CARL M. CARLSON

Carl M. Carlson

Chief Financial Officer

(Principal Financial Officer)

EX-32.1

Exhibit 32.1 

STATEMENT FURNISHED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT

OF 2002, 18 U.S.C. SECTION 1350 

The undersigned, Paul A. Perrault, is the President and Chief Executive Officer of Brookline Bancorp, Inc. (the “Company”).

This statement is being furnished in connection with the filing by the Company of the Company’s Quarterly Report on Form 10-Q for the quarter endedMarch 31, 2018(the “Report”).

By execution of this statement, I certify that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m(a) or 78o(d)); and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company as of the dates and for the periods covered by the Report.

This statement is authorized to be attached as an exhibit to the Report so that this statement will accompany the Report at such time as the Report is filed with the Securities and Exchange Commission pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350. It is not intended that this statement be deemed to be filed for purposes of the Securities Exchange Act of 1934, as amended.

Date: May 8, 2018

/s/ PAUL A. PERRAULT

Paul A. Perrault

President and Chief Executive Officer

(Principal Executive Officer)

EX-32.2

Exhibit 32.2 

SSTATEMENT FURNISHED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT

OF 2002, 18 U.S.C. SECTION 1350

The undersigned, Carl M. Carlson, is the Chief Accounting Officer of Brookline Bancorp, Inc. (the “Company”).

This statement is being furnished in connection with the filing by the Company of the Company’s Quarterly Report on Form 10-Q for the quarter endedMarch 31, 2018(the “Report”).

By execution of this statement, I certify that:

1.The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m(a) or 78o(d)); and

2.The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company as of the dates and for the periods covered by the Report.

This statement is authorized to be attached as an exhibit to the Report so that this statement will accompany the Report at such time as the Report is filed with the Securities and Exchange Commission pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350. It is not intended that this statement be deemed to be filed for purposes of the Securities Exchange Act of 1934, as amended.

Date: May 8, 2018

/s/ CARL M. CARLSON

Carl M. Carlson

Chief Financial Officer

(Principal Financial Officer)

XML

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2018	May 08, 2018
Document and Entity Information
Entity Registrant Name	BROOKLINE BANCORP INC
Entity Central Index Key	0001049782
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Current Reporting Status	Yes
Document Type	10-Q
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		80,316,597

XML

Unaudited Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
ASSETS
Cash and due from banks	$ 34,713	$ 25,622
Short-term investments	49,743	35,383
Total cash and cash equivalents	84,456	61,005
Investment securities available-for-sale	558,357	540,124
Investment securities held-to-maturity (fair value of $114,810 and $108,523, respectively)	117,352	109,730
Total investment securities	675,709	649,854
Loans held-for-sale	756	2,628
Total loans and leases	6,114,461	5,730,679
Allowance for loan and lease losses	(58,714)	(58,592)
Net loans and leases	6,055,747	5,672,087
Restricted equity securities	66,164	59,369
Premises and equipment, net of accumulated depreciation of $65,150 and $63,423, respectively	80,268	80,283
Deferred tax asset	19,198	15,061
Goodwill	160,896	137,890
Identified intangible assets, net of accumulated amortization of $34,205 and $33,738, respectively	7,697	6,044
Other real estate owned (OREO) and repossessed assets, net	3,963	4,419
Other assets	93,260	91,609
Total assets	7,248,114	6,780,249
Deposits:
Demand checking accounts	987,153	942,583
Interest-bearing deposits:
NOW accounts	342,374	350,568
Savings accounts	637,920	646,359
Money market accounts	1,862,351	1,724,363
Certificate of deposit accounts	1,361,722	1,207,470
Total interest-bearing deposits	4,204,367	3,928,760
Total deposits	5,191,520	4,871,343
Borrowed funds:
Advances from the Federal Home Loan Bank of Boston (FHLBB)	982,533	889,909
Subordinated debentures and notes	83,311	83,271
Other borrowed funds	33,585	47,639
Total borrowed funds	1,099,429	1,020,819
Mortgagors' escrow accounts	8,395	7,686
Accrued expenses and other liabilities	74,024	67,818
Total liabilities	6,373,368	5,967,666
Commitments and contingencies
Brookline Bancorp, Inc. stockholders' equity:
Common stock, $0.01 par value; 200,000,000 shares authorized; 85,177,172 shares issued and 81,695,695 shares issued, respectively	852	817
Additional paid-in capital	755,843	699,976
Retained earnings, partially restricted	172,934	161,217
Accumulated other comprehensive loss	(11,666)	(5,950)
Treasury stock, at cost; 4,401,333 shares and 4,440,665 shares, respectively	(51,454)	(51,454)
Unallocated common stock held by Employee Stock Ownership Plan (ESOP); 134,238 shares and 142,332 shares, respectively	(732)	(776)
Total Brookline Bancorp, Inc. stockholders' equity	865,777	803,830
Noncontrolling interest in subsidiary	8,969	8,753
Total stockholders' equity	874,746	812,583
Total liabilities and stockholders' equity	7,248,114	6,780,249
Commercial real estate loans
ASSETS
Total loans and leases	3,240,258	3,075,777
Commercial loans and leases
ASSETS
Total loans and leases	1,707,002	1,624,111
Consumer loans
ASSETS
Total loans and leases	$ 1,167,201	$ 1,030,791

XML

Unaudited Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Investment securities held to maturity, fair value	$ 114,810	$ 108,523
Premises and equipment, accumulated depreciation and amortization	65,150	63,423
Identified intangible assets, accumulated amortization	$ 34,205	$ 33,738
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	85,177,172	81,695,695
Treasury stock, shares	4,401,333	4,440,665
Unallocated common stock held by ESOP, shares	134,238	142,332

XML

Unaudited Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Interest and dividend income:
Loans and leases	$ 67,272	$ 58,558
Debt securities	3,323	3,000
Marketable and restricted equity securities	924	726
Short-term investments	120	67
Total interest and dividend income	71,639	62,351
Interest expense:
Deposits	7,099	5,080
Borrowed funds	5,049	4,173
Total interest expense	12,148	9,253
Net interest income	59,491	53,098
Provision for credit losses	641	13,402
Net interest income after provision for credit losses	58,850	39,696
Non-interest income:
Deposit fees	2,463	2,252
Loan fees	290	261
Loan level derivative income, net	866	402
Gain on sales of investment securities, net	1,162	11,393
Gain on sales of loans and leases held-for-sale	299	353
Other	1,088	1,247
Total non-interest income	6,168	15,908
Non-interest expense:
Compensation and employee benefits	22,314	19,784
Occupancy	3,959	3,645
Equipment and data processing	4,618	4,063
Professional services	1,144	1,106
FDIC insurance	635	855
Advertising and marketing	1,057	817
Amortization of identified intangible assets	467	532
Merger and acquisition expense	2,905	0
Other	2,839	2,954
Total non-interest expense	39,938	33,756
Income before provision for income taxes	25,080	21,848
Provision for income taxes	5,652	7,835
Net income before noncontrolling interest in subsidiary	19,428	14,013
Less net income attributable to noncontrolling interest in subsidiary	795	568
Net income attributable to Brookline Bancorp, Inc.	$ 18,633	$ 13,445
Earnings per common share:
Basic (in dollars per share)	$ 0.24	$ 0.19
Diluted (in dollars per share)	$ 0.24	$ 0.19
Weighted average common shares outstanding during the year:
Basic (in shares)	77,879,593	70,386,766
Diluted (in shares)	78,167,800	70,844,096
Dividends declared per common share (in dollars per share)	$ 0.10	$ 0.09

XML

Unaudited Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income before noncontrolling interest in subsidiary	$ 19,428	$ 14,013
Investment securities available-for-sale:
Unrealized securities holding (losses) gains	(7,401)	870
Income tax expense (benefit)	1,632	(313)
Net unrealized securities holding (losses) gains before reclassification adjustments, net of taxes	(5,769)	557
Less reclassification adjustments for securities gains included in net income:
Loss on sales of securities, net	(68)	0
Income tax expense	15	0
Net reclassification adjustments for securities gains included in net income	(53)	0
Net unrealized securities holding (losses) gains	(5,716)	557
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax [Abstract]
Adjustment of accumulated obligation for postretirement benefits	0	0
Income tax expense	0	0
Net adjustment of accumulated obligation for postretirement benefits	0	0
Other comprehensive (loss) income, net of taxes	(5,716)	557
Comprehensive income	13,712	14,570
Net income attributable to noncontrolling interest in subsidiary	795	568
Comprehensive income attributable to Brookline Bancorp, Inc.	$ 12,917	$ 14,002

XML

Unaudited Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock	Unallocated Common Stock Held by ESOP	Total Brookline Bancorp, Inc. Stockholders' Equity	Noncontrolling Interest in Subsidiary
Balance at Dec. 31, 2016	$ 702,749	$ 757	$ 616,734	$ 136,671	$ (3,818)	$ (53,837)	$ (963)	$ 695,544	$ 7,205
Increase (Decrease) in Stockholders' Equity
Net income attributable to Brookline Bancorp, Inc.	13,445			13,445				13,445
Net income attributable to noncontrolling interest in subsidiary	568								568
Issuance of noncontrolling units	118								118
Other comprehensive income (loss)	557				557			557
Common stock dividends	0			0				0
Dividend distribution to owners of noncontrolling interest in subsidiary	(6,865)			(6,350)				(6,350)	(515)
Compensation under recognition and retention plan	559		559			0		559
Common stock held by ESOP committed to be released	118		71				47	118
Balance at Mar. 31, 2017	711,249	757	617,364	143,766	(3,261)	(53,837)	(916)	703,873	7,376
Balance at Dec. 31, 2017	812,583	817	699,976	161,217	(5,950)	(51,454)	(776)	803,830	8,753
Increase (Decrease) in Stockholders' Equity
Net income attributable to Brookline Bancorp, Inc.	18,633			18,633				18,633
Net income attributable to noncontrolling interest in subsidiary	795								795
Common stock issued for acquisition	55,181	35						55,181
Issuance of noncontrolling units	129								129
Other comprehensive income (loss)	(5,716)				(5,716)			(5,716)
Common stock dividends	(6,916)			(6,916)				(6,916)
Dividend distribution to owners of noncontrolling interest in subsidiary	(708)								(708)
Compensation under recognition and retention plan	633		633			0		633
Common stock held by ESOP committed to be released	132		88				44	132
Balance at Mar. 31, 2018	$ 874,746	$ 852	$ 755,843	$ 172,934	$ (11,666)	$ (51,454)	$ (732)	$ 865,777	$ 8,969

XML

Unaudited Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Stockholders' Equity [Abstract]
Common stock dividends, per share (in dollars per share)	$ 0.09	$ 0.09
Common stock held by ESOP committed to be released, shares	8,094	8,589

XML

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net income attributable to Brookline Bancorp, Inc.	$ 18,633	$ 13,445
Adjustments to reconcile net income to net cash provided from operating activities:
Net income attributable to noncontrolling interest in subsidiary	795	568
Provision for credit losses	641	13,402
Origination of loans and leases held-for-sale	(7,198)	(8,493)
Proceeds from sales of loans and leases held-for-sale, net	9,362	13,246
Deferred income tax benefit	(2,520)	(4,925)
Depreciation of premises and equipment	1,801	1,795
Amortization of investment securities premiums and discounts, net	507	416
Amortization of deferred loan and lease origination costs, net	1,625	1,626
Amortization of identified intangible assets	467	532
Amortization of debt issuance costs	25	25
Amortization (accretion) of acquisition fair value adjustments, net	1,185	(617)
Gain on sales of investment securities, net	(1,162)	(11,393)
Gain on sales of loans and leases held-for-sale	(299)	(353)
Gain on sales of OREO and other repossessed assets, net	0	(10)
Write-down of OREO and other repossessed assets	197	56
Compensation under recognition and retention plans	682	579
ESOP shares committed to be released	132	118
Net change in:
Cash surrender value of bank-owned life insurance	(254)	(256)
Other assets	(1,397)	1,986
Accrued expenses and other liabilities	6,143	(2,781)
Net cash provided from (used for) operating activities	29,365	18,966
Cash flows from investing activities:
Proceeds from sales of investment securities available-for-sale	1,470	11,515
Proceeds from maturities, calls, and principal repayments of investment securities available-for-sale	21,632	19,592
Purchases of investment securities available-for-sale	(49,108)	(23,935)
Proceeds from maturities, calls, and principal repayments of investment securities held to maturity	1,158	1,300
Proceeds from redemption/sales of restricted equity securities	1,230	0
Purchases of investment securities held-to-maturity	(8,915)	(14,873)
Purchase of restricted equity securities	(6,795)	(3,676)
Proceeds from sales of loans and leases held-for-investment, net	285	698
Net increase in loans and leases	(386,752)	(59,893)
Acquisitions, net of cash and cash equivalents acquired	(25,126)	0
Purchase of premises and equipment, net	(1,827)	(2,659)
Proceeds from sales of OREO and other repossessed assets	853	413
Net cash used for investing activities	(451,895)	(71,518)
Cash flows from financing activities:
Increase (decrease) in demand checking, NOW, savings and money market accounts	165,925	(8,798)
Increase in certificates of deposit	153,091	49,625
Proceeds from FHLBB advances	3,250,390	1,294,000
Repayment of FHLBB advances	(3,157,766)	(1,274,259)
Decrease in other borrowed funds, net	(14,054)	(6,570)
Increase in mortgagors' escrow accounts, net	709	387
Common stock issued for acquisition	55,181	0
Payment of dividends on common stock	(6,916)	(6,350)
Proceeds from issuance of noncontrolling units	129	118
Payment of dividends to owners of noncontrolling interest in subsidiary	(708)	(515)
Net cash (used for) provided from used for financing activities	445,981	47,638
Net increase (decrease) in cash and cash equivalents	23,451	(4,914)
Cash and cash equivalents at beginning of period	61,005	67,657
Cash and cash equivalents at end of period	84,456	62,743
Cash paid during the period for:
Interest on deposits, borrowed funds and subordinated debt	12,880	10,789
Income taxes	928	4,861
Non-cash investing activities:
Transfer from loans and leases held-for-sale to loans and leases	0	7,500
Transfer from loans to other real estate owned	594	1,346
Acquisition of First Commons Bank, N.A.:
Fair value of assets acquired, net of cash and cash equivalents acquired	292,025	0
Fair value of liabilities assumed	$ 278,988	$ 0

XML

Basis of Presentation

3 Months Ended

Mar. 31, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

Basis of Presentation

Overview

Brookline Bancorp, Inc. (the "Company") is a bank holding company (within the meaning of the Bank Holding Company Act of 1956, as amended) and the parent of Brookline Bank, a Massachusetts-chartered savings bank; Bank Rhode Island ("BankRI"), a Rhode Island-chartered financial institution; and First Ipswich Bank ("First Ipswich"), a Massachusetts-chartered trust company (collectively referred to as the "Banks"). The Banks are all members of the Federal Reserve System. The Company is also the parent of Brookline Securities Corp. ("BSC"). The Company's primary business is to provide commercial, business and retail banking services to its corporate, municipal and retail customers through the Banks and its non-bank subsidiaries.

On March 1, 2018, the Company completed the acquisition of First Commons Bank, N.A. ("First Commons Bank"). First Commons Bank was merged with and into Brookline Bank. Brookline Bank, which includes its wholly-owned subsidiaries BBS Investment Corp., Longwood Securities Corp. ("LSC") and its 84.1%-owned subsidiary, Eastern Funding LLC ("Eastern Funding"), operates 27 full-service banking offices in the greater Boston metropolitan area, including two additional branches from the First Commons Bank acquisition. BankRI, which includes its wholly-owned subsidiaries, Acorn Insurance Agency, BRI Realty Corp., Macrolease Corporation ("Macrolease"), BRI Investment Corp. and its wholly-owned subsidiary, BRI MSC Corp., operates 20 full-service banking offices in the greater Providence, Rhode Island area. First Ipswich, which includes its wholly-owned subsidiaries First Ipswich Insurance Agency and First Ipswich Securities II Corp., operates six full-service banking offices on the north shore of eastern Massachusetts.

The Company's activities include acceptance of commercial, municipal and retail deposits, origination of mortgage loans on commercial and residential real estate located principally in all New England states, origination of commercial loans and leases to small- and mid-sized businesses, investment in debt and equity securities, and the offering of cash management and investment advisory services. The Company also provides specialty equipment financing through its subsidiaries Eastern Funding, which is based in New York City, New York, and Macrolease, which is based in Plainview, New York.

The Company and the Banks are supervised, examined and regulated by the Board of Governors of the Federal Reserve System ("FRB"). As a Massachusetts-chartered savings bank and trust company respectively, Brookline Bank and First Ipswich are also subject to regulation under the laws of the Commonwealth of Massachusetts and the jurisdiction of the Massachusetts Division of Banks. As a Rhode Island-chartered financial institution, BankRI is subject to regulation under the laws of the State of Rhode Island and the jurisdiction of the Banking Division of the Rhode Island Department of Business Regulation.

The Federal Deposit Insurance Corporation ("FDIC") offers insurance coverage on all deposits up to $250,000 per depositor at each of the Banks. As FDIC-insured depository institutions, the Banks are also secondarily subject to supervision, examination and regulation by the FDIC. Additionally, as a Massachusetts-chartered savings bank, the deposits of Brookline Bank are insured by the Depositors Insurance Fund ("DIF"), a private industry-sponsored insurance company. The DIF insures savings bank deposits in excess of the FDIC insurance limits. As such, Brookline Bank offers 100% insurance on all deposits as a result of a combination of insurance from the FDIC and the DIF. Brookline Bank is required to file reports with the DIF.

Basis of Financial Statement Presentation

The unaudited consolidated financial statements of the Company presented herein have been prepared pursuant to the rules of the Securities and Exchange Commission (“SEC”) for quarterly reports on Form 10-Q and do not include all of the information and note disclosures required by U.S. generally accepted accounting principles (“GAAP”). In the opinion of Management, all adjustments (consisting of normal recurring adjustments) and disclosures considered necessary for the fair presentation of the accompanying consolidated financial statements have been included. Interim results are not necessarily reflective of the results of the entire year. The accompanying unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Annual Report on Form 10-K for the fiscal year ended December 31, 2017. 

The unaudited consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All significant intercompany transactions and balances are eliminated in consolidation.

In preparing these consolidated financial statements, Management is required to make significant estimates and assumptions that affect the reported amounts of assets, liabilities, income, expenses and disclosure of contingent assets and liabilities. Actual results could differ from those estimates based upon changing conditions, including economic conditions and future events. Material estimates that are particularly susceptible to significant change in the near-term include the determination of the allowance for loan and lease losses, the determination of fair market values of assets and liabilities, including acquired loans and leases, the review of goodwill and intangibles for impairment and the review of deferred tax assets for valuation allowances.

The judgments used by Management in applying these critical accounting policies may be affected by a further and prolonged deterioration in the economic environment, which may result in changes to future financial results. For example, subsequent evaluations of the loan and lease portfolio, in light of the factors then prevailing, may result in significant changes in the allowance for loan and lease losses in future periods, and the inability to collect outstanding principal may result in increased loan and lease losses.

Reclassification

Certain previously reported amounts have been reclassified to conform to the current year's presentation.

Recent Accounting Pronouncements

In February 2018, FASB issued ASU 2018-03, Technical Corrections and Improvements to Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. This ASU was issued to add improvements to update ASU 2016-01 to increase stakeholders’ awareness of the amendments and to expedite the improvements. This ASU is effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years beginning after June 15, 2018. Public business entities with fiscal years beginning between December 15, 2017 and June 15, 2018, are not required to adopt these amendments until the interim period beginning after June 15, 2018, and public business entities with fiscal years beginning between June 15, 2018, and December 15, 2018, are not required to adopt these amendments before adopting the amendments in Update 2016-01. Management has determined that ASU 2018-03 does apply, but has not determined the impact, if any, as of March 31, 2018.

In February 2018, the FASB issued Accounting Standards Update (ASU) No. 2018-02, "Income Statement-Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income" was issued to address a narrow-scope financial reporting issue that arose as a consequence of the change in the tax law. On December 22, 2017, the U.S. federal government enacted a tax bill, H.R.1, An Act to Provide for Reconciliation Pursuant to Titles II and V of the Concurrent Resolution on the Budget for Fiscal Year 2018 (the “Tax Reform Act”). The ASU No. 2018-02 requires a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the newly enacted federal corporate income tax rate. The amount of the reclassification would be the difference between the historical corporate income tax rate of 35 percent and the newly enacted 21 percent corporate income tax rate. The ASU No. 2018-02 is effective for all entities for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years with early adoption permitted, including adoption in any interim period, for (i) public business entities for reporting periods for which financial statements have not yet been issued and (ii) all other entities for reporting periods for which financial statements have not yet been made available for issuance. The changes are required to be applied retrospectively to each period (or periods) in which the effect of the change in the U.S. federal corporate income tax rate in the Tax Cuts and Jobs Act of 2017 is recognized. Management early adopted this ASU as of December 31, 2017, which resulted in the reclassification from accumulated other comprehensive loss to retained earnings totaling $1.1 million, reflected in the Consolidated Statements of Changes in Stockholders' Equity.

In November 2017, the FASB issued ASU 2017-14, Income Statement-Reporting Comprehensive Income (Topic 220), Revenue Recognition (Topic 605), and Revenue from Contracts with Customers (Topic 606): Amendments to SEC Paragraphs Pursuant to Staff Accounting Bulletin No. 116 and SEC Release No. 33-10403. This ASU was issued to amend certain SEC paragraphs pursuant to the SEC Staff Accounting Bulletin No.116 and SEC Release No. 33-10403, which bring existing guidance into conformity with Topic 606, Revenue from Contract with Customers. The ASU was effective for annual periods beginning after December 15, 2017. Management has determined that this ASU does apply as of January 1, 2018 and has determined the impact to be immaterial as of March 31, 2018.

In May 2017, the FASB issued ASU 2017-09, Compensation-Stock Compensation (Topic 718): Scope of Modification Accounting. FASB issued this Update to address the diversity in practice as well as the cost and complexity when applying the guidance in Topic 718, Compensation - Stock Compensation, to a change to the terms or conditions of a share-based payment award. For public entities, this ASU is effective for annual reporting periods beginning after December 15, 2017. Management has determined that this ASU does apply as of January 1, 2018 and has determined the impact to be immaterial as of March 31, 2018.

In March 2017, the FASB issued Accounting Standards Update ASU 2017-07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost (Topic 715). This ASU was issued primarily to improve the presentation of net periodic pension cost and net periodic postretirement benefit cost. This ASU is effective for annual reporting periods beginning after December 15, 2017. Management has determined that this ASU does apply as of January 1, 2018 and has determined the impact to be immaterial as of March 31, 2018.

In January 2017, the FASB issued ASU 2017-04, Intangibles - Goodwill and Other (Topic 350). This ASU was issued to simplify the subsequent measurement of goodwill by eliminating Step 2 from the goodwill impairment test. For public entities, this ASU is effective for the fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted and application should be on a prospective basis. Management has evaluated this ASU and as of December 31, 2017, the Company has adopted the ASU and determined the impact to be immaterial as of March 31, 2018.

In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230). This ASU was issued to provide clarification and uniformity on the presentation and classification of certain cash receipts and cash payments in the statement of cash flows under Topic 230. Early adoption is permitted as of the fiscal years beginning after December 15, 2017, for public entities that file with the SEC. The Company adopted ASU 2016-15 effective January 1, 2017 and the adoption did not have a material impact on the Company’s consolidated financial statements.

In June 2016, the FASB issued ASU 2016-13, Financial instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. The intent of this ASU is to replace the current GAAP method of calculating credit losses. Current GAAP uses a higher threshold at which likely losses can be calculated and recorded. The new process will require institutions to account for likely losses that originally would not have been part of the calculation. The calculation will incorporate future forecasting in addition to historical and current measures. For public entities that file with the SEC, this ASU is effective for the fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. This ASU must be applied prospectively to debt securities marked as other than temporarily impaired. A retrospective approach will be applied cumulatively to retained earnings. Early adoption is permitted as of the fiscal years beginning after December 15, 2018. Management has determined that ASU 2016-13 does apply, but has not determined the impact, if any, as of March 31, 2018. In preparation for the adoption in 2020 of this ASU, management formed a steering committee to oversee the adoption of ASU 2016-13. The steering committee along with a project team has developed an approach for implementation and has selected a third party software service provider. The project team is in the testing phase of the third party software.

In March 2016, the FASB issued ASU 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. This ASU was issued as part of the FASB Simplification Initiative which intends to reduce the complexity of GAAP while improving usefulness to users. The ASU was effective for annual periods beginning after December 15, 2016, and interim periods within those annual reporting periods with early adoption available. The Company adopted ASU 2016-09 effective January 1, 2017 and the adoption did not have a material impact on the Company’s consolidated financial statements.

In February 2016, FASB issued ASU 2016-02, Leases. This ASU requires lessees to record most leases on their balance sheet but recognize expenses on their income statements in a manner similar to current accounting. This ASU also eliminates current real estate-specific provisions for all companies. For lessors, this ASU modifies the classification criteria and the accounting for sales-type and direct financing leases. This ASU is effective for fiscal years beginning after December 15, 2018, including interim periods therein. Early adoption is permitted. Management believes that this ASU applies and has not determined the impact, if any, as of March 31, 2018. Management has met to discuss the impact and will assemble a project team to assess steps required for adoption. The steps will include a review of third party lease software service providers.

In January 2016, the FASB issued ASU 2016-01, Financial Instruments. This ASU significantly revises an entity’s accounting related to (1) the classification and measurement of investments in equity securities and (2) the presentation of certain fair value changes for financial liabilities measured at fair value. It also amends certain disclosure requirements associated with the fair value of financial instruments. This ASU is effective for fiscal years beginning after December 15, 2017, including interim periods therein. Management has determined that ASU 2016-01 does apply as of January 1, 2018 and management has determined the impact to be immaterial as of March 31, 2018.

Accounting Standards Update No. 2014-09, “Revenue from Contracts with Customers” (“ASU 2014-09”), was issued in May 2014 and provides a revenue recognition framework for any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of non-financial assets unless those contracts are within the scope of other accounting standards. As issued, ASU 2014-09 was effective for annual periods beginning after December 15, 2016, including interim periods within that reporting period with early adoption not permitted. The standard permits the use of either the retrospective or cumulative effect transition method. In August 2015, Accounting Standards Update No. 2015-14, “Deferral of the Effective Date” (“ASU 2015-14”) was issued and delayed the effective date of ASU 2014-09 to annual and interim periods in fiscal years beginning after December 15, 2017. In 2016, Accounting Standards Update No. 2016-08, “Principal versus Agent Considerations” (“ASU 2016-08”), Accounting Standards Update No. 2016-10, “Identifying Performance Obligations and Licensing” (“ASU 2016-10”) and Accounting Standards Update No. 2016-12, “Narrow-Scope Improvements and Practical Expedients” (“ASU 2016-12”) were issued. These ASUs did not change the core principle for revenue recognition in Topic 606; instead, the amendments provided more detailed guidance in a few areas and additional implementation guidance and examples to reduce the degree of judgment necessary to comply with Topic 606. The effective date and transition requirements for ASU 2016-08, ASU 2016-10 and ASU 2016-12 were the same as those provided by ASU 2015-14. Management assembled a project team to address the changes pursuant to Topic 606. The project team completed a scope assessment and contract review for in-scope revenue streams. Topic 606 did not apply to several income generating streams. Management excluded from their analysis, income associated with financial instruments, gains on sale of investment securities and loans, gains on Low Income Housing Tax Credits ("LIHTC") and loan level derivative income. Revenue streams that were included were service charges on deposit accounts, loan fees, and income received through a third party relationship. Management adopted the provisions of ASU 2014-09 effective January 1, 2018, using the modified retrospective transition method. The adoption did not have a material impact on the Company's consolidated financial statements. See Note 13, "Revenue from Contracts with Customers," for further details.

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Acquisitions

3 Months Ended

Mar. 31, 2018

Business Combinations [Abstract]

Acquisitions

Acquisitions

First Commons Bank, N.A.

On March 1, 2018, the Company completed the acquisition (the “Transaction”) of First Commons Bank. First Commons Bank was merged with and into the Company’s subsidiary bank, Brookline Bank. First Commons Bank has two branch locations in Newton Centre and Wellesley, Massachusetts. These branch locations are expected to be closed on June 1, 2018 and consolidated into Brookline Bank’s existing branch locations in Newton Centre and Wellesley, Massachusetts.

The Transaction qualified as a tax-free reorganization for federal income tax purposes. The total Transaction consideration was $56.0 million. First Commons Bank stockholders received, for each share of First Commons Bank common stock, the right to receive 1.089 shares of the Company’s common stock with cash in lieu of fractional shares, options, and warrants, resulting in a total cash consideration payment of $851 thousand and an increase to the Company’s outstanding shares of 3,481,477 shares.

The Company accounted for the Transaction using the estimated fair value of assets and liabilities assumed as of the acquisition date. The excess of consideration paid over the fair value of identifiable net assets was recorded as goodwill in the consolidated financial statements. Accordingly, the Company recorded merger and acquisition expenses of $2.9 million for the three months ended March 31, 2018.

The following table summarizes the estimated fair value of the assets acquired and liabilities assumed as of the date of the acquisition:

	Net Assets Acquired at Fair Value
	(In Thousands)
ASSETS
Cash	$	42,995
Restricted stock	1,884
Loans	262,095
Premises and equipment	583
Goodwill	23,005
Core deposit and other intangibles	2,122
Other assets	2,336
Total assets acquired	335,020
LIABILITIES
Deposits	273,701
Borrowings	5,000
Other liabilities	287
Total liabilities assumed	278,988
Purchase price	$	56,032

Fair values of the major categories of assets acquired and liabilities assumed were determined as follows:

Cash and Cash Equivalents

The fair values of cash and cash equivalents approximate the respective carrying amounts because the instruments are payable on demand or have short-term maturities.

Restricted Stock

The fair value of restricted stock approximate the respective carrying amount. The stock is comprised of $880 thousand of FHLBB stock and $1.0 million of FRB stock. These amounts were transferred to the Brookline Bank name at each respective institution.

Loans

The loans acquired were recorded at fair value without a carryover of the allowance for loan losses. There were no credit related issues with the acquired portfolio. For the loan purchase accounting, management used the following assumptions: no specific credit mark valuations as determined by the Company's Credit Risk Management; segregation of portfolio into certain loan categories; loan level valuations versus a pooled approach; prepayment rate assumptions and market discount rates.

The Company recorded a $1.6 million discount from the results of the loan accounting valuation. There was $27 thousand of accretion recorded as of March 31, 2018.

Deposits - Core Deposit Intangible ("CDI")

Accounts included in the CDI include demand deposits, NOW accounts, money market accounts and savings accounts. The fair value of the core deposit intangible was derived from using the following assumptions: account retention rates, alternative cost of funds, effective cost of funds, cost savings, present value of annual net cost savings and market discount rate.

The Company recorded a $2.1 million CDI from the results of the deposit valuation. There was $41 thousand of amortization recorded as of March 31, 2018.

Certificate of Deposits

The certificates of deposits were recorded at fair value. The determination of the fair value was calculated using a discounted cash flow analysis, which involved present valuing the contractual payments over the remaining life of the certificate of deposit at market based-rates.

The Company recorded a $1.2 million discount from the results of the certificate of deposit valuation. There was $82 thousand of accretion recorded as of March 31, 2018.

Borrowings

The borrowings at acquisition typically require a fair market valuation performed as of the acquisition date. The difference between the current recorded balance and the fair market value will be reflected as a fair value mark. The Company’s Treasury team performed two valuations to review the fair value mark. After reviewing the results, the fair value mark was immaterial and management decided not to record any fair market value adjustment on the acquired borrowings.

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Investment Securities

3 Months Ended

Mar. 31, 2018

Investments, Debt and Equity Securities [Abstract]

Investment Securities

Investment Securities

The following tables set forth investment securities available-for-sale and held-to-maturity at the dates indicated:

	At March 31, 2018
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(In Thousands)
Investment securities available-for-sale:
GSE debentures	$	184,760	$	71	$	3,863	$	180,968
GSE CMOs	125,061		18		5,382		119,697
GSE MBSs	197,083		231		5,129		192,185
SBA commercial loan asset-backed securities	70		—		1		69
Corporate debt obligations	56,784		5		917		55,872
U.S. Treasury bonds	8,794		—		197		8,597
Trust preferred securities	—		—		—		—
Marketable equity securities	980		6		17		969
Total investment securities available-for-sale	$	573,532	$	331	$	15,506	$	558,357
Investment securities held-to-maturity:
GSE debentures	$	50,529	$	4	$	1,358	$	49,175
GSEs MBSs	13,344		—		340		13,004
Municipal obligations	52,979		11		856		52,134
Foreign government obligations	500		—		3		497
Total investment securities held-to-maturity	$	117,352	$	15	$	2,557	$	114,810

	December 31, 2017
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(In Thousands)
Investment securities available-for-sale:
GSE debentures	$	151,483	$	70	$	1,629	$	149,924
GSE CMOs	131,082		27		4,087		127,022
GSE MBSs	191,281		354		2,322		189,313
SBA commercial loan asset-backed securities	73		—		1		72
Corporate debt obligations	62,811		110		238		62,683
U.S. Treasury bonds	8,785		7		62		8,730
Trust preferred securities	1,471		—		73		1,398
Marketable equity securities	978		13		9		982
Total investment securities available-for-sale	$	547,964	$	581	$	8,421	$	540,124
Investment securities held-to-maturity:
GSE debentures	$	41,612	$	—	$	811	$	40,801
GSEs MBSs	13,923		—		218		13,705
Municipal obligations	53,695		159		337		53,517
Foreign government obligations	500		—		—		500
Total investment securities held-to-maturity	$	109,730	$	159	$	1,366	$	108,523

As of March 31, 2018, the fair value of all investment securities available-for-sale was $558.4 million, with net unrealized losses of $15.2 million, compared to a fair value of $540.1 million and net unrealized losses of $7.8 million as of December 31, 2017. As of March 31, 2018, $512.1 million, or 91.7% of the portfolio, had gross unrealized losses of $15.5 million, compared to $469.2 million, or 86.9% of the portfolio, with gross unrealized losses of $8.4 million as of December 31, 2017.

As of March 31, 2018, the fair value of all investment securities held-to-maturity was $114.8 million, with net unrealized losses of $2.5 million, compared to a fair value of $108.5 million with net unrealized losses of $1.2 million as of December 31, 2017. As of March 31, 2018, $109.0 million, or 95.0% of the portfolio, had gross unrealized losses of $2.6 million. There were $92.9 million, or 85.6% of the portfolio, with gross unrealized losses of $1.4 million as of December 31, 2017.

Investment Securities as Collateral

As of March 31, 2018 and December 31, 2017, respectively, $463.1 million and $431.2 million of investment securities were pledged as collateral for repurchase agreements; municipal deposits; treasury, tax and loan deposits; swap agreements; FRB borrowings; and FHLBB borrowings. The Banks did not have any outstanding FRB borrowings as of March 31, 2018 and December 31, 2017.

Other-Than-Temporary Impairment ("OTTI")

Investment securities as of March 31, 2018 and December 31, 2017 that have been in a continuous unrealized loss position for less than twelve months or twelve months or longer are as follows:

	At March 31, 2018
	Less than Twelve Months				Twelve Months or Longer				Total
	Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses
	(In Thousands)
Investment securities available-for-sale:
GSE debentures	$	143,716	$	3,284	$	12,256	$	579	$	155,972	$	3,863
GSE CMOs	2,614		64		116,505		5,318		119,119		5,382
GSE MBSs	109,406		2,250		70,625		2,879		180,031		5,129
SBA commercial loan asset-backed securities	32		—		31		1		63		1
Corporate debt obligations	45,522		761		2,350		156		47,872		917
U.S. Treasury bonds	8,597		197		—		—		8,597		197
Trust preferred securities	—		—		—		—		—		—
Marketable equity securities	—		—		495		17		495		17
Temporarily impaired investment securities available-for-sale	309,887		6,556		202,262		8,950		512,149		15,506
Investment securities held-to-maturity:
GSE debentures	32,196		628		14,007		730		46,203		1,358
GSEs MBSs	1,872		34		11,081		306		12,953		340
Municipal obligations	42,717		591		6,644		265		49,361		856
Foreign government obligations	—		—		497		3		497		3
Temporarily impaired investment securities held-to-maturity	76,785		1,253		32,229		1,304		109,014		2,557
Total temporarily impaired investment securities	$	386,672	$	7,809	$	234,491	$	10,254	$	621,163	$	18,063

	December 31, 2017
	Less than Twelve Months				Twelve Months or Longer				Total
	Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses
	(In Thousands)
Investment securities available-for-sale:
GSE debentures	$	120,409	$	1,263	$	12,481	$	366	$	132,890	$	1,629
GSE CMOs	2,862		34		123,548		4,053		126,410		4,087
GSE MBSs	94,985		753		74,782		1,569		169,767		2,322
SBA commercial loan asset-backed securities	34		—		33		1		67		1
Corporate debt obligations	30,978		154		2,423		84		33,401		238
U.S. Treasury bonds	4,767		62		—		—		4,767		62
Trust preferred securities	—		—		1,398		73		1,398		73
Marketable equity securities	—		—		503		9		503		9
Temporarily impaired investment securities available-for-sale	254,035		2,266		215,168		6,155		469,203		8,421
Investment securities held-to-maturity:
GSE debentures	26,594		281		14,208		530		40,802		811
GSEs MBSs	1,996		15		11,674		203		13,670		218
Municipal obligations	30,542		235		7,408		102		37,950		337
Foreign government obligations	—		—		500		—		500		—
Temporarily impaired investment securities held-to-maturity	59,132		531		33,790		835		92,922		1,366
Total temporarily impaired investment securities	$	313,167	$	2,797	$	248,958	$	6,990	$	562,125	$	9,787

The Company performs regular analysis of the investment securities available-for-sale portfolio to determine whether a decline in fair value indicates that an investment security is OTTI. In making these OTTI determinations, management considers, among other factors, the length of time and extent to which the fair value has been less than amortized cost; projected future cash flows; credit subordination and the creditworthiness; capital adequacy and near-term prospects of the issuers.

Management also considers the Company's capital adequacy, interest-rate risk, liquidity and business plans in assessing whether it is more likely than not that the Company will sell or be required to sell the investment securities before recovery. If the Company determines that a decline in fair value is OTTI and that it is more likely than not that the Company will not sell or be required to sell the investment security before recovery of its amortized cost, the credit portion of the impairment loss is recognized in the Company's unaudited consolidated statement of income and the noncredit portion is recognized in accumulated other comprehensive income. The credit portion of the OTTI impairment represents the difference between the amortized cost and the present value of the expected future cash flows of the investment security. If the Company determines that a decline in fair value is OTTI and it is more likely than not that it will sell or be required to sell the investment security before recovery of its amortized cost, the entire difference between the amortized cost and the fair value of the security will be recognized in the Company's unaudited consolidated statement of income.

Investment Securities Available-For-Sale Impairment Analysis

The following discussion summarizes, by investment security type, the basis for evaluating if the applicable investment securities within the Company’s available-for-sale portfolio were OTTI as of March 31, 2018. Based on the analysis below and the determination that, it is more likely than not that the Company will not sell or be required to sell the investment securities before recovery of its amortized cost. The Company's ability and intent to hold these investment securities until recovery is supported by the Company's strong capital and liquidity positions as well as its historically low portfolio turnover. As such, management has determined that the investment securities are not OTTI as of March 31, 2018. If market conditions for investment securities worsen or the creditworthiness of the underlying issuers deteriorates, it is possible that the Company may recognize additional OTTI in future periods.

U.S. Government-Sponsored Enterprises

The Company invests in securities issued by U.S. Government-sponsored enterprises ("GSEs"), including GSE debentures, mortgage-backed securities ("MBSs"), and collateralized mortgage obligations ("CMOs"). GSE securities include obligations issued by the Federal National Mortgage Association ("FNMA"), the Federal Home Loan Mortgage Corporation ("FHLMC"), the Government National Mortgage Association ("GNMA"), the FHLBB and the Federal Farm Credit Bank. As of March 31, 2018, only GNMA MBSs and CMOs, and Small Business Administration ("SBA") commercial loan asset-backed securities in our available-for-sale portfolio with an estimated fair value of $23.1 million were backed explicitly by the full faith and credit of the U.S. Government, compared to $23.7 million as of December 31, 2017.

As of March 31, 2018, the Company owned 60 GSE debentures with a total fair value of $181.0 million, and a net unrealized loss of $3.8 million. As of December 31, 2017, the Company held 48 GSE debentures with a total fair value of $149.9 million, with a net unrealized loss of $1.6 million. As of March 31, 2018, 51 of the 60 securities in this portfolio were in an unrealized loss position. As of December 31, 2017, 43 of the 48 securities in this portfolio were in an unrealized loss position. All securities are performing and backed by the implicit (FHLB/FNMA/FHLMC) or explicit (GNMA/SBA) guarantee of the U.S Government. During the three months endedMarch 31, 2018, the Company purchased a total of $33.9 million GSE debentures. This compares to $23.9 million purchased during the same period in 2017.

As of March 31, 2018, the Company owned 62 GSE CMOs with a total fair value of $119.7 million and a net unrealized loss of $5.4 million. As of December 31, 2017, the Company held 62 GSE CMOs with a total fair value of $127.0 million with a net unrealized loss of $4.1 million. As of March 31, 2018, 47 of the 62 securities in this portfolio were in an unrealized loss position. As of December 31, 2017, 47 of the 62 securities in this portfolio were in an unrealized loss position. All securities are performing and backed by the implicit (FHLB/FNMA/FHLMC) or explicit (GNMA) guarantee of the U.S Government. During the three months endedMarch 31, 2018 and 2017, the Company did not purchase any GSE CMOs.

As of March 31, 2018, the Company owned 195 GSE MBSs with a total fair value of $192.2 million and a net unrealized loss of $4.9 million. As of December 31, 2017, the Company held 194 GSE MBSs with a total fair value of $189.3 million with a net unrealized loss of $2.0 million. As of March 31, 2018, 94 of the 195 securities in this portfolio were in an unrealized loss position. As of December 31, 2017, 82 of the 194 securities in this portfolio were in an unrealized loss position. All securities are performing and backed by the implicit (FHLB/FNMA/FHLMC) or explicit (GNMA) guarantee of the U.S Government. During the three months endedMarch 31, 2018, the Company purchased a total of $15.2 million GSE MBSs, as compared to the same period in 2017, when the Company did not purchased any GSE MBSs.

SBA Commercial Loan Asset-Backed

As of March 31, 2018, the Company owned five SBA securities with a total fair value of $0.1 million, which approximated amortized cost. As of December 31, 2017, the Company owned five SBA securities with a total fair value of $0.1 million, which approximated amortized cost. As of March 31, 2018, four of the five securities in this portfolio were in an unrealized loss position. As of December 31, 2017, four of the five securities in this portfolio were in an unrealized loss position. All securities are performing and backed by the explicit guarantee of the U.S Government. During the three months endedMarch 31, 2018 and 2017, the Company did not purchase any SBA securities.

Corporate Obligations

The Company may invest in high-quality corporate obligations to provide portfolio diversification and improve the overall yield on the portfolio. As of March 31, 2018, the Company held 17 corporate obligation securities with a total fair value of $55.9 million and a net unrealized loss of $0.9 million. As of December 31, 2017, the Company held 19 corporate obligation securities with a total fair value of $62.7 million and a net unrealized loss of $0.1 million. As of March 31, 2018, 14 of the 17 securities in this portfolio were in an unrealized loss position. As of December 31, 2017, nine of the nineteen securities in this portfolio were in an unrealized loss position. Full collection of the obligations is expected because the financial condition of the issuers is sound, they have not defaulted on scheduled payments, the obligations are rated investment grade, and the Company has the ability and intent to hold the obligations for a period of time to recover the amortized cost. During the three months endedMarch 31, 2018 and 2017, the Company did not purchase any corporate obligations.

U.S. Treasury Bonds

The Company invests in securities issued by the U.S. government. As of March 31, 2018, the Company owned two U.S. Treasury bonds with a total fair value of $8.6 million and an unrealized loss of $0.2 million. This compares to two U.S. Treasury bonds with a total fair value of $8.7 million and an unrealized loss of $0.1 million as of December 31, 2017. During the three months endedMarch 31, 2018 and 2017, the Company did not purchase any U.S. Treasury bonds.

Trust Preferred Securities

Trust preferred securities represent subordinated debt issued by financial institutions. As of March 31, 2018, the Company sold the remaining two trust preferred securities with a total fair value of $1.4 million and a realized loss of $0.1 million. This compares to two trust preferred securities with a total fair value of $1.4 million and an unrealized loss of $0.1 million as of December 31, 2017.

Marketable Equity Securities

From time to time, the Company will invest in mutual funds for community reinvestment purposes. As of March 31, 2018 and December 31, 2017, the Company owned two marketable equity securities with a fair value of $1.0 million, which approximated amortized cost. As of March 31, 2018 and December 31, 2017, one of the two securities in this portfolio was in an unrealized loss position. During the three months endedMarch 31, 2018 and 2017, the Company did not purchase any marketable equity securities.

Investment Securities Held-to-Maturity Impairment Analysis

The following discussion summarizes by investment security type, the basis for evaluating if the applicable investment securities within the Company's held-to-maturity portfolio were OTTI at March 31, 2018. Management has the ability and the intent to hold the securities until maturity.

U.S. Government-Sponsored Enterprises

As of March 31, 2018, the Company owned 17 GSE debentures with a total fair value of $49.2 million and a net unrealized loss of $1.4 million. As of December 31, 2017, the Company owned 14 GSE debentures with a total fair value of $40.8 million and an unrealized loss of $0.8 million. As of March 31, 2018, 16 of the 17 securities in this portfolio were in an unrealized loss position. At December 31, 2017, all 14 of the securities in this portfolio were in unrealized loss positions. All securities are performing and backed by the implicit (FHLB/FNMA/FHLMC) or explicit (GNMA) guarantee of the U.S Government. During the three months endedMarch 31, 2018 and 2017, the Company purchased a total of $8.9 million and $14.9 million in GSE debentures, respectively.

As of March 31, 2018, the Company owned 11 GSE MBSs with a total fair value of $13.0 million and an unrealized loss of $0.3 million. As of December 31, 2017, the Company owned 11 GSE MBSs with a total fair value of $13.7 million and an unrealized loss of $0.2 million. As of March 31, 2018 and December 31, 2017, eight of the eleven securities in this portfolio were in an unrealized loss position. All securities are performing and backed by the implicit (FHLB/FNMA/FHLMC) or explicit (GNMA) guarantee of the U.S Government. During the three months endedMarch 31, 2018 and 2017, the Company did not purchase any GSE MBSs.

Municipal Obligations

The Company invests in certain state and municipal securities with high credit ratings for portfolio diversification and tax planning purposes. As of March 31, 2018, the Company owned 100 municipal obligation securities with a total fair value of $52.1 million and and a net unrealized loss of $0.8 million. As of December 31, 2017, the Company owned 100 municipal obligation securities with a total fair value of $53.5 million and an unrealized loss of $0.2 million. As of March 31, 2018, 93 of the 100 securities in this portfolio were in an unrealized loss position as compared to December 31, 2017, when 69 of the 100 securities were in an unrealized loss position. During the three months endedMarch 31, 2018 and 2017, the Company did not purchase any municipal obligations.

Foreign Government Obligations

As of March 31, 2018 and December 31, 2017, the Company owned one foreign government obligation security with a fair value of $0.5 million, which approximated cost. As of March 31, 2018 and December 31, 2017 respectively, the security was in an unrealized loss position. During the three months endedMarch 31, 2018 and 2017, the Company did not purchase any foreign government obligations.

Portfolio Maturities

The final stated maturities of the debt securities are as follows for the periods indicated:

	At March 31, 2018						At December 31, 2017
	Amortized Cost		Estimated Fair Value		Weighted Average Rate		Amortized Cost		Estimated Fair Value		Weighted Average Rate
	(Dollars in Thousands)
Investment securities available-for-sale:
Within 1 year	$	25,290	$	25,250	2.23	%	$	23,612	$	23,652	2.27	%
After 1 year through 5 years	162,284		159,464		2.13	%	142,772		142,029		2.05	%
After 5 years through 10 years	146,756		142,749		2.15	%	136,746		134,978		2.06	%
Over 10 years	238,222		229,925		2.15	%	243,856		238,483		2.06	%
	$	572,552	$	557,388	2.15	%	$	546,986	$	539,142	2.07	%
Investment securities held-to-maturity:
Within 1 year	$	1,470	$	1,463	1.00	%	$	918	$	916	0.78	%
After 1 year through 5 years	60,727		59,838		1.80	%	58,335		57,939		1.74	%
After 5 years through 10 years	41,863		40,556		1.98	%	36,589		35,998		1.79	%
Over 10 years	13,292		12,953		2.23	%	13,888		13,670		1.98	%
	$	117,352	$	114,810	1.90	%	$	109,730	$	108,523	1.78	%

Actual maturities of debt securities will differ from those presented above since certain obligations amortize and may also provide the issuer the right to call or prepay the obligation prior to scheduled maturity without penalty. MBSs and CMOs are included above based on their final stated maturities; the actual maturities, however, may occur earlier due to anticipated prepayments and stated amortization of cash flows.

As of March 31, 2018, issuers of debt securities with an estimated fair value of $30.8 million had the right to call or prepay the obligations. Of the $30.8 million, approximately $17.7 million matures in 1 - 5 years, $13.1 million matures in 6 - 10 years, and none mature after ten years. As of December 31, 2017, issuers of debt securities with an estimated fair value of approximately $58.8 million had the right to call or prepay the obligations. Of the $58.8 million, $32.7 million matures in 1-5 years, $25.2 million matures in 6-10 years, and $0.9 million matures after ten years.

Security Sales

On February 3, 2017, the Company, through BSC, received $319 in cash and 14.876 shares of Community Bank Systems, Inc. (“CBU”) common stock in exchange for each of the 9,721 shares of Northeast Retirement Services, Inc. (“NRS”) stock held by BSC. The exchange was completed in accordance with the merger agreement entered into between NRS and CBU. As part of the merger agreement, the Company was restricted to selling 5,071 shares of CBU per day in the open market. During the quarter ended March 31, 2017, the Company completed the sale of all the CBU shares required in the merger. When securities are sold, the adjusted cost of the specific security sold is used to compute the gain or loss on the sale. The table below includes the activity with respect to the sale of the CBU shares.

On March 6, 2018, the Company, through its wholly owned subsidiary, BSC, received $0.6 million in cash and 11,303 shares of CBU common stock as settlement for the indemnification escrow on the 12 month anniversary date of the merger between NRS and CBU. The Company subsequently sold all 11,303 shares of theCBU stock and recognized again on the sale of $0.6 million.

During the month of March, 2018, the Company, through Brookline Bank’s wholly owned subsidiary, LSC, sold two trust preferred securities with a book value of $1.5 million for a loss of $0.1 million. The table below includes the activity with respect to the sale of the trust preferred securities.

Sales of investment and restricted equity securities are summarized as follows:

	Three Months Ended March 31, 2018			Three Months Ended March 31, 2017
	(In Thousands)
Sales of marketable and restricted equity securities	$	2,700		$	11,393
Gross gains from sales	1,230			11,612
Gross losses from sales	(68		)	(219		)
Gain on sales of securities, net	$	1,162		$	11,393

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Loans and Leases

3 Months Ended

Mar. 31, 2018

Receivables [Abstract]

Loans and Leases

Loans and Leases

The following tables present loan and lease balances and weighted average coupon rates for the originated and acquired loan and lease portfolios at the dates indicated:

	At March 31, 2018
	Originated				Acquired				Total
	Balance		Weighted Average Coupon		Balance		Weighted Average Coupon		Balance		Weighted Average Coupon
	(Dollars In Thousands)
Commercial real estate loans:
Commercial real estate	$	2,129,110	4.28	%	$	148,918	4.44	%	$	2,278,028	4.29	%
Multi-family mortgage	740,603		4.21	%	52,987		4.56	%	793,590		4.23	%
Construction	136,784		4.80	%	31,856		—	%	168,640		3.89	%
Total commercial real estate loans	3,006,497		4.29	%	233,761		3.86	%	3,240,258		4.26	%
Commercial loans and leases:
Commercial	726,852		4.49	%	35,070		5.89	%	761,922		4.55	%
Equipment financing	888,494		7.35	%	3,847		5.94	%	892,341		7.34	%
Condominium association	52,739		4.52	%	—		—	%	52,739		4.52	%
Total commercial loans and leases	1,668,085		6.01	%	38,917		5.89	%	1,707,002		6.01	%
Consumer loans:
Residential mortgage	613,370		3.90	%	159,633		4.38	%	773,003		4.00	%
Home equity	315,085		4.42	%	49,785		4.75	%	364,870		4.47	%
Other consumer	29,187		4.92	%	141		18.00	%	29,328		4.98	%
Total consumer loans	957,642		4.10	%	209,559		4.48	%	1,167,201		4.17	%
Total loans and leases	$	5,632,224	4.77	%	$	482,237	4.29	%	$	6,114,461	4.73	%

	At December 31, 2017
	Originated				Acquired				Total
	Balance		Weighted Average Coupon		Balance		Weighted Average Coupon		Balance		Weighted Average Coupon
	(Dollars In Thousands)
Commercial real estate loans:
Commercial real estate	$	2,069,392	4.17	%	$	105,577	4.37	%	$	2,174,969	4.18	%
Multi-family mortgage	735,921		4.09	%	24,749		4.48	%	760,670		4.10	%
Construction	140,138		4.58	%	—		—	%	140,138		4.58	%
Total commercial real estate loans	2,945,451		4.17	%	130,326		4.39	%	3,075,777		4.18	%
Commercial loans and leases:
Commercial	696,825		4.35	%	8,179		5.77	%	705,004		4.37	%
Equipment financing	861,974		7.28	%	4,514		5.92	%	866,488		7.27	%
Condominium association	52,619		4.49	%	—		—	%	52,619		4.49	%
Total commercial loans and leases	1,611,418		5.92	%	12,693		5.82	%	1,624,111		5.92	%
Consumer loans:
Residential mortgage	604,897		3.81	%	55,168		4.28	%	660,065		3.85	%
Home equity	314,189		4.16	%	41,765		4.62	%	355,954		4.21	%
Other consumer	14,667		5.51	%	105		18.00	%	14,772		5.60	%
Total consumer loans	933,753		3.95	%	97,038		4.44	%	1,030,791		4.00	%
Total loans and leases	$	5,490,622	4.65	%	$	240,057	4.49	%	$	5,730,679	4.64	%

The net unamortized deferred loan origination fees and costs included in total loans and leases were $15.8 million and $15.5 million as of March 31, 2018 and December 31, 2017, respectively.

The Banks and subsidiaries lend primarily in all New England states, with the exception of equipment financing, 15.3% of which is in the greater New York and New Jersey metropolitan area and 84.7% of which is in other areas in the United States of America as of March 31, 2018.

Accretable Yield for the Acquired Loan Portfolio

The following table summarizes activity in the accretable yield for the acquired loan portfolio for the periods indicated:

	Three Months Ended March 31,
	2018			2017
	(In Thousands)
Balance at beginning of period	$	10,522		$	14,353
Accretion	(1,185		)	(1,407		)
Reclassification from (to) nonaccretable difference as a result of changes in expected cash flows	316			126
Balance at end of period	$	9,653		$	13,072

On a quarterly basis, subsequent to acquisition, management reforecasts the expected cash flows for acquired ASC 310-30 loans, taking into account prepayment speeds, probability of default and loss given defaults. Management compares cash flow projections per the reforecast to the original cash flow projections and determines whether any reduction in cash flow expectations are due to deterioration, or if the change in cash flow expectation is related to noncredit events. This cash flow analysis is used to evaluate the need for a provision for loan and lease losses and/or prospective yield adjustments. During the three months ended March 31, 2018 and 2017, accretable yield adjustments totaling $0.3 million and $0.1 million, respectively, were made for certain loan pools. These accretable yield adjustments, which are subject to continued re-assessment, will be recognized over the remaining lives of those pools.

Loans and Leases Pledged as Collateral

As of March 31, 2018 and December 31, 2017, there were $2.2 billion and $2.3 billion, respectively, of loans and leases pledged as collateral for repurchase agreements; municipal deposits; treasury, tax and loan deposits; swap agreements; FRB borrowings; and FHLBB borrowings. The Banks did not have any outstanding FRB borrowings as of March 31, 2018 and December 31, 2017.

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Allowance for Loan and Lease Losses

3 Months Ended

Mar. 31, 2018

Receivables [Abstract]

Allowance for Loan and Lease Losses

Allowance for Loan and Lease Losses

The following tables present the changes in the allowance for loan and lease losses and the recorded investment in loans and leases by portfolio segment for the periods indicated:

	Three Months Ended March 31, 2018
	Commercial Real Estate			Commercial			Consumer			Total
	(In Thousands)
Balance at December 31, 2017	$	27,112		$	26,333		$	5,147		$	58,592
Charge-offs	(3		)	(733		)	(56		)	(792		)
Recoveries	—			201			86			287
Provision (credit) for loan and lease losses	252			451			(76		)	627
Balance at March 31, 2018	$	27,361		$	26,252		$	5,101		$	58,714

	Three Months Ended March 31, 2017
	Commercial Real Estate			Commercial			Consumer			Total
	(In Thousands)
Balance at December 31, 2016	$	27,645		$	20,906		$	5,115		$	53,666
Charge-offs	(24		)	(1,207		)	(151		)	(1,382		)
Recoveries	140			142			105			387
Provision (credit) for loan and lease losses	227			13,442			(207		)	13,462
Balance at March 31, 2017	$	27,988		$	33,283		$	4,862		$	66,133

The liability for unfunded credit commitments, which is included in other liabilities, was $1.7 million at both March 31, 2018 and December 31, 2017. The changes in the liability for unfunded credit commitments reflect changes in the estimate of loss exposure associated with certain unfunded credit commitments. No credit commitments were charged off against the liability account in the three-month periods ended March 31, 2018 and 2017.

Provision for Credit Losses

The provisions for credit losses are set forth below for the periods indicated:

	Three Months Ended March 31,
	2018			2017
	(In Thousands)
Provision (credit) for loan and lease losses:
Commercial real estate	$	252		$	227
Commercial	451			13,442
Consumer	(76		)	(207		)
Total provision for loan and lease losses	627			13,462
Unfunded credit commitments	14			(60		)
Total provision for credit losses	$	641		$	13,402

Allowance for Loan and Lease Losses Methodology

Management has established a methodology to determine the adequacy of the allowance for loan and lease losses that assesses the risks and losses inherent in the loan and lease portfolio. Additions to the allowance for loan and lease losses are made by charges to the provision for credit losses. Losses on loans and leases are charged off against the allowance when all or a portion of a loan or lease is considered uncollectible. Subsequent recoveries on loans previously charged off, if any, are credited to the allowance when realized.

Management uses a consistent and systematic process and methodology to evaluate the adequacy of the allowance for loan and lease losses on a quarterly basis. For purposes of determining the allowance for loan and lease losses, the Company has segmented certain loans and leases in the portfolio by product type into the following segments: (1) commercial real estate loans, (2) commercial loans and leases, and (3) consumer loans. Portfolio segments are further disaggregated into classes based on the associated risks within the segments. Commercial real estate loans are divided into three classes: commercial real estate loans, multi-family mortgage loans, and construction loans. Commercial loans and leases are divided into three classes: commercial loans which include taxi medallion loans, equipment financing, and loans to condominium associations. Consumer loans are divided into three classes: residential mortgage loans, home equity loans, and other consumer loans. A formula-based credit evaluation approach is applied to each group, coupled with an analysis of certain loans for impairment. For each class of loan, management makes significant judgments in selecting the estimation method that fits the credit characteristics of its class and portfolio segment as set forth below.

The general allowance related to loans collectively evaluated for impairment is determined using a formula-based approach utilizing the risk ratings of individual credits and loss factors derived from historic portfolio loss rates, which include estimates of incurred losses over an estimated loss emergence period (“LEP”). The LEP was generated utilizing a charge-off look-back analysis which studied the time from the first indication of elevated risk of repayment (or other early event indicating a problem) to eventual charge-off to support the LEP considered in the allowance calculation. This reserving methodology established the approximate number of months of LEP that represents incurred losses for each portfolio. In addition to quantitative measures, relevant qualitative factors include, but are not limited to: (1) levels and trends in past due and impaired loans, (2) levels and trends in charge-offs, (3) changes in underwriting standards, policy exceptions, and credit policy, (4) experience of lending management and staff, (5) economic trends, (6) industry conditions, (7) effects of changes in credit concentrations, (8) interest rate environment, and (9) regulatory and other changes. The general allowance related to the acquired loans collectively evaluated for impairment is determined based upon the degree, if any, of deterioration in the pooled loans subsequent to acquisition. The qualitative factors used in the determination are the same as those used for originated loans.

Specific valuation allowances are established for impaired originated loans with book values greater than the discounted present value of expected future cash flows or, in the case of collateral-dependent impaired loans, for any excess of a loan's book balance over the fair value of its underlying collateral. Specific valuation allowances are established for acquired loans with deterioration in the discounted present value of expected future cash flows since acquisitions or, in the case of collateral dependent impaired loans, for any increase in the excess of a loan's book balance greater than the fair value of its underlying collateral. A specific valuation allowance for losses on troubled debt restructured ("TDR") loans is determined by comparing the net carrying amount of the troubled debt restructured loan with the restructured loan's cash flows discounted at the original effective rate. Impaired loans are reviewed quarterly with adjustments made to the calculated reserve as necessary.

As of March 31, 2018, management believes that the methodology for calculating the allowance is sound and that the allowance provides a reasonable basis for determining and reporting on probable losses incurred in the Company’s loan portfolios.

As of March 31, 2018, the Company had a portfolio of approximately $18.5 million in loans secured by taxi medallions issued by the cities of Boston and Cambridge. As of December 31, 2017, this portfolio was approximately $19.7 million. Application-based mobile ride services, such as Uber and Lyft, have generated increased competition in the transportation sector, resulting in a reduction in taxi utilization and, as a result, a reduction in the collateral value and credit quality of taxi medallion loans. This has increased the likelihood that loans secured by taxi medallions may default, or that the borrowers may be unable to repay these loans at maturity, potentially resulting in an increase in past due loans, TDRs, and charge-offs. The Company’s allowance calculation included a further segmentation of the commercial loans and leases to reflect the increased risk in the Company’s taxi medallion portfolio. This allowance calculation segmentation represents management’s estimations of the current risks associated with the portfolio.

As of March 31, 2018, the Company had an allowance for loan and lease losses associated with taxi medallion loans of $2.9 million of which $2.1 million were specific reserves and $0.8 million was a general reserve. The general reserve includes coverage for one taxi medallion relationship of $0.2 million which is treated as a commercial loan for allowance purposes due to the strength of personal guarantees supported by commercial real estate and other assets. As of December 31, 2017, the Company had an allowance for loan and lease losses associated with taxi medallion loans of $3.8 million of which $2.7 million were specific reserves and $1.1 million was a general reserve. The decrease in the allowance for loan and leases associated with taxi medallion loans was primarily driven by the decrease in specific reserves due to changes in the underlying collateral value of taxi medallions. The total TDRs secured by taxi medallions increased by $0.2 million from $3.7 million at December 31, 2017 to $3.9 million at March 31, 2018 due to one taxi medallion relationship which was restructured during the first quarter of 2018. The total loans and leases secured by taxi medallions that were placed on nonaccrual decreased to $7.6 million at March 31, 2018 from $7.8 million at December 31, 2017 due to the charge-off of three taxi medallion relationships which were placed on nonaccrual status. In addition, further declines in demand for taxi services or further deterioration in the value of taxi medallions may result in higher delinquencies and losses beyond that provided for in the allowance for loan and lease losses.

The general allowance for loan and lease losses was $56.2 million as of March 31, 2018, compared to $55.5 million as of December 31, 2017. The general allowance for loan and lease losses increased by $0.7 million during the three months endedMarch 31, 2018, as a result of the continued growth in the Company's loan portfolios.

The specific allowance for loan and lease losses was $2.5 million as of March 31, 2018, compared to $3.1 million as of December 31, 2017. The specific allowance decreased by $0.7 million during the three months endedMarch 31, 2018, primarily due to changes in the underlying collateral value of taxi medallions and charge-offs taken during the three months endedMarch 31, 2018.

Credit Quality Assessment

At the time of loan origination, a rating is assigned based on the capacity to pay and general financial strength of the borrower, the value of assets pledged as collateral, and the evaluation of third party support such as a guarantor. The Company continually monitors the quality of the loan portfolio using all available information. The officer responsible for handling each loan is required to initiate changes to risk ratings when changes in facts and circumstances occur that warrant an upgrade or downgrade in a loan rating. Based on this information, loans demonstrating certain payment issues or other weaknesses may be categorized as delinquent, impaired, nonperforming and/or put on nonaccrual status. Additionally, in the course of resolving such loans, the Company may choose to restructure the contractual terms of certain loans to match the borrower's ability to repay the loan based on their current financial condition. If a restructured loan meets certain criteria, it may be categorized as a TDR loan.

The Company reviews numerous credit quality indicators when assessing the risk in its loan portfolio. For all loans, the Company utilizes an eight-grade loan rating system, which assigns a risk rating to each borrower based on a number of quantitative and qualitative factors associated with a loan transaction. Factors considered include industry and market conditions; position within the industry; earnings trends; operating cash flow; asset/liability values; debt capacity; guarantor strength; management and controls; financial reporting; collateral; and other considerations. In addition, the Company'sindependent loan review group evaluates the credit quality and related risk ratings in all loan portfolios. The results of these reviews are reported to the Risk Committee of the Board of Directors on a periodic basis and annually to the Board of Directors. For the consumer loans, the Company heavily relies on payment status for calibrating credit risk.

The ratings categories used for assessing credit risk in the commercial real estate, multi-family mortgage, construction, commercial, equipment financing, condominium association and other consumer loan and lease classes are defined as follows:

1 -4 Rating—Pass

Loan rating grades "1" through "4" are classified as "Pass," which indicates borrowers are performing in accordance with the terms of the loan and are less likely to result in loss due to the capacity of the borrower to pay and the adequacy of the value of assets pledged as collateral.

5 Rating—Other Assets Especially Mentioned ("OAEM")

Borrowers exhibit potential credit weaknesses or downward trends deserving management's attention. If not checked or corrected, these trends will weaken the Company's asset and position. While potentially weak, currently these borrowers are marginally acceptable; no loss of principal or interest is envisioned.

6 Rating—Substandard

Borrowers exhibit well defined weaknesses that jeopardize the orderly liquidation of debt. Substandard loans may be inadequately protected by the current net worth and paying capacity of the obligors or by the collateral pledged, if any. Normal repayment from the borrower is in jeopardy. Although no loss of principal is envisioned, there is a distinct possibility that a partial loss of interest and/or principal will occur if the deficiencies are not corrected. Collateral coverage may be inadequate to cover the principal obligation.

7 Rating—Doubtful

Borrowers exhibit well-defined weaknesses that jeopardize the orderly liquidation of debt with the added provision that the weaknesses make collection of the debt in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable. Serious problems exist to the point where partial loss of principal is likely.

8 Rating—Definite Loss

Borrowers deemed incapable of repayment. Loans to such borrowers are considered uncollectible and of such little value that continuation as active assets of the Company is not warranted.

Assets rated as "OAEM," "substandard" or "doubtful" based on criteria established under banking regulations are collectively referred to as "criticized" assets.

Credit Quality Information

The following tables present the recorded investment in loans in each class as of March 31, 2018, by credit quality indicator.

	At March 31, 2018
	Commercial Real Estate		Multi- Family Mortgage		Construction		Commercial		Equipment Financing		Condominium Association		Other Consumer		Total
	(In Thousands)
Originated:
Loan rating:
Pass	$	2,118,831	$	740,015	$	135,924	$	692,888	$	878,539	$	52,739	$	29,134	$	4,648,070
OAEM	5,684		—		—		13,762		1,833		—		—		21,279
Substandard	4,394		588		860		19,271		5,357		—		53		30,523
Doubtful	201		—		—		931		2,765		—		—		3,897
Total originated	2,129,110		740,603		136,784		726,852		888,494		52,739		29,187		4,703,769
Acquired:
Loan rating:
Pass	136,685		52,706		31,856		33,452		3,836		—		140		258,675
OAEM	1,930		—		—		275		—		—		1		2,206
Substandard	10,303		281		—		1,343		11		—		—		11,938
Doubtful	—		—		—		—		—		—		—		—
Total acquired	148,918		52,987		31,856		35,070		3,847		—		141		272,819
Total loans	$	2,278,028	$	793,590	$	168,640	$	761,922	$	892,341	$	52,739	$	29,328	$	4,976,588

As of March 31, 2018, there were no loans categorized as definite loss.

	At March 31, 2018
	Residential Mortgage				Home Equity
	(Dollars In Thousands)
Originated:
Loan-to-value ratio:
Less than 50%	$	155,121	20.1	%	$	144,513	39.6	%
50% - 69%	270,273		35.0	%	75,826		20.8	%
70% - 79%	166,304		21.5	%	66,491		18.2	%
80% and over	19,988		2.6	%	28,212		7.7	%
Data not available*	1,684		0.2	%	43		—	%
Total originated	613,370		79.4	%	315,085		86.3	%
Acquired:
Loan-to-value ratio:
Less than 50%	32,140		4.0	%	29,519		8.3	%
50%—69%	45,905		5.9	%	13,150		3.5	%
70%—79%	40,067		5.2	%	985		0.3	%
80% and over	29,930		3.9	%	886		0.2	%
Data not available*	11,591		1.6	%	5,245		1.4	%
Total acquired	159,633		20.6	%	49,785		13.7	%
Total loans	$	773,003	100.0	%	$	364,870	100.0	%

_______________________________________________________________________________

* Represents in process general ledger accounts for which data are not available.

The following tables present the recorded investment in loans in each class as of December 31, 2017, by credit quality indicator.

	At December 31, 2017
	Commercial Real Estate		Multi- Family Mortgage		Construction		Commercial		Equipment Financing		Condominium Association		Other Consumer		Total
	(In Thousands)
Originated:
Loan rating:
Pass	$	2,054,376	$	735,313	$	139,278	$	670,265	$	850,006	$	52,619	$	14,628	$	4,516,485
OAEM	8,889		—		—		7,691		3,630		—		—		20,210
Substandard	5,926		608		860		17,681		5,012		—		39		30,126
Doubtful	201		—		—		1,188		3,326		—		—		4,715
Total originated	2,069,392		735,921		140,138		696,825		861,974		52,619		14,667		4,571,536
Acquired:
Loan rating:
Pass	94,244		24,459		—		6,643		4,501		—		104		129,951
OAEM	9,839		—		—		265		—		—		1		10,105
Substandard	1,494		290		—		1,271		13		—		—		3,068
Doubtful	—		—		—		—		—		—		—		—
Total acquired	105,577		24,749		—		8,179		4,514		—		105		143,124
Total loans	$	2,174,969	$	760,670	$	140,138	$	705,004	$	866,488	$	52,619	$	14,772	$	4,714,660

As of December 31, 2017, there were no loans categorized as definite loss.

	At December 31, 2017
	Residential Mortgage				Home Equity
	(Dollars In Thousands)
Originated:
Loan-to-value ratio:
Less than 50%	$	153,373	23.2	%	$	148,137	41.6	%
50%—69%	265,328		40.2	%	75,099		21.1	%
70%—79%	168,272		25.5	%	63,742		17.9	%
80% and over	16,547		2.5	%	27,122		7.6	%
Data not available*	1,377		0.2	%	89		—	%
Total originated	604,897		91.6	%	314,189		88.2	%
Acquired:
Loan-to-value ratio:
Less than 50%	16,521		2.5	%	25,312		7.1	%
50%—69%	19,182		2.9	%	13,883		3.9	%
70%—79%	10,507		1.6	%	943		0.3	%
80% and over	7,893		1.2	%	582		0.2	%
Data not available*	1,065		0.2	%	1,045		0.3	%
Total acquired	55,168		8.4	%	41,765		11.8	%
Total loans	$	660,065	100.0	%	$	355,954	100.0	%

_______________________________________________________________________________

* Represents in process general ledger accounts for which data are not available.

The following table presents information regarding foreclosed residential real estate property for the periods indicated:

	At March 31, 2018	At December 31, 2017
	(In Thousands)
Recorded investment in mortgage loans collateralized by residential real estate property that are in the process of foreclosure	—	633

There were no foreclosed residential real estate property held by the creditor at March 31, 2018 or December 31, 2017.

Age Analysis of Past Due Loans and Leases

The following tables present an age analysis of the recorded investment in total loans and leases as of March 31, 2018 and December 31, 2017.

	At March 31, 2018
	Past Due												Loans and Leases Past Due Greater Than 90 Days and Accruing
	31-60 Days		61-90 Days		Greater Than 90 Days		Total		Current		Total Loans and Leases				Nonaccrual Loans and Leases
	(In Thousands)
Originated:
Commercial real estate loans:
Commercial real estate	$	8,466	$	633	$	2,645	$	11,744	$	2,117,366	$	2,129,110	$	—	$	3,954
Multi-family mortgage	1,032		—		—		1,032		739,571		740,603		—		588
Construction	297		—		860		1,157		135,627		136,784		—		860
Total commercial real estate loans	9,795		633		3,505		13,933		2,992,564		3,006,497		—		5,402
Commercial loans and leases:
Commercial	1,453		1,642		6,133		9,228		717,624		726,852		—		9,927
Equipment financing	4,207		778		4,241		9,226		879,268		888,494		—		6,661
Condominium association	855		161		—		1,016		51,723		52,739		—		—
Total commercial loans and leases	6,515		2,581		10,374		19,470		1,648,615		1,668,085		—		16,588
Consumer loans:
Residential mortgage	1,553		—		580		2,133		611,237		613,370		—		1,962
Home equity	285		1		51		337		314,748		315,085		1		130
Other consumer	113		13		34		160		29,027		29,187		—		53
Total consumer loans	1,951		14		665		2,630		955,012		957,642		1		2,145
Total originated loans and leases	$	18,261	$	3,228	$	14,544	$	36,033	$	5,596,191	$	5,632,224	$	1	$	24,135

	At March 31, 2018
	Past Due												Loans and Leases Past Due Greater Than 90 Days and Accruing
	31-60 Days		61-90 Days		Greater Than 90 Days		Total		Current		Total Loans and Leases				Nonaccrual Loans and Leases
	(In Thousands)
Acquired:
Commercial real estate loans:
Commercial real estate	$	8,680	$	55	$	1,604	$	10,339	$	138,579	$	148,918	$	1,534	$	126
Multi-family mortgage	—		—		—		—		52,987		52,987		—		—
Construction	—		—		—		—		31,856		31,856		—		—
Total commercial real estate loans	8,680		55		1,604		10,339		223,422		233,761		1,534		126
Commercial loans and leases:
Commercial	93		38		836		967		34,103		35,070		1		1,223
Equipment financing	—		—		11		11		3,836		3,847		5		—
Total commercial loans and leases	93		38		847		978		37,939		38,917		6		1,223
Consumer loans:
Residential mortgage	431		767		2,201		3,399		156,234		159,633		2,201		—
Home equity	260		88		265		613		49,172		49,785		140		795
Other consumer	—		—		—		—		141		141		—		—
Total consumer loans	691		855		2,466		4,012		205,547		209,559		2,341		795
Total acquired loans and leases	$	9,464	$	948	$	4,917	$	15,329	$	466,908	$	482,237	$	3,881	$	2,144
Total loans and leases	$	27,725	$	4,176	$	19,461	$	51,362	$	6,063,099	$	6,114,461	$	3,882	$	26,279

	At December 31, 2017
	Past Due												Loans and Leases Past Due Greater Than 90 Days and Accruing
	31-60 Days		61-90 Days		Greater Than 90 Days		Total		Current		Total Loans and Leases				Nonaccrual Loans and Leases
	(In Thousands)
Originated:
Commercial real estate loans:
Commercial real estate	$	3,294	$	391	$	1,843	$	5,528	$	2,063,864	$	2,069,392	$	—	$	3,182
Multi-family mortgage	6,141		2,590		—		8,731		727,190		735,921		—		608
Construction	6,537		330		860		7,727		132,411		140,138		—		860
Total commercial real estate loans	15,972		3,311		2,703		21,986		2,923,465		2,945,451		—		4,650
Commercial loans and leases:
Commercial	1,344		597		7,724		9,665		687,160		696,825		—		10,365
Equipment financing	3,214		2,494		3,203		8,911		853,063		861,974		224		8,106
Condominium association	857		262		—		1,119		51,500		52,619		—		—
Total commercial loans and leases	5,415		3,353		10,927		19,695		1,591,723		1,611,418		224		18,471
Consumer loans:
Residential mortgage	1,256		166		728		2,150		602,747		604,897		—		1,979
Home equity	643		19		32		694		313,495		314,189		1		132
Other consumer	238		20		28		286		14,381		14,667		—		43
Total consumer loans	2,137		205		788		3,130		930,623		933,753		1		2,154
Total originated loans and leases	$	23,524	$	6,869	$	14,418	$	44,811	$	5,445,811	$	5,490,622	$	225	$	25,275

	At December 31, 2017
	Past Due												Loans and Leases Past Due Greater Than 90 Days and Accruing
	31-60 Days		61-90 Days		Greater Than 90 Days		Total		Current		Total Loans and Leases				Nonaccrual Loans and Leases
	(In Thousands)
Acquired:
Commercial real estate loans:
Commercial real estate	$	1,008	$	—	$	656	$	1,664	$	103,913	$	105,577	$	586	$	131
Multi-family mortgage	—		—		3		3		24,746		24,749		3		—
Construction	—		—		—		—		—		—		—		—
Total commercial real estate loans	1,008		—		659		1,667		128,659		130,326		589		131
Commercial loans and leases:
Commercial	—		44		1,022		1,066		7,113		8,179		17		1,254
Equipment financing	—		—		13		13		4,501		4,514		13		—
Total commercial loans and leases	—		44		1,035		1,079		11,614		12,693		30		1,254
Consumer loans:
Residential mortgage	—		463		1,990		2,453		52,715		55,168		1,990		—
Home equity	508		—		186		694		41,071		41,765		186		612
Other consumer	—		—		—		—		105		105		—		—
Total consumer loans	508		463		2,176		3,147		93,891		97,038		2,176		612
Total acquired loans and leases	$	1,516	$	507	$	3,870	$	5,893	$	234,164	$	240,057	$	2,795	$	1,997
Total loans and leases	$	25,040	$	7,376	$	18,288	$	50,704	$	5,679,975	$	5,730,679	$	3,020	$	27,272

Commercial Real Estate Loans—As of March 31, 2018, loans outstanding in the three classes within this segment expressed as a percentage of total loans and leases outstanding were as follows: commercial real estate loans -- 37.1%; multi-family mortgage loans -- 13.0%; and construction loans -- 2.8%.

Loans in this portfolio that are on nonaccrual status and/or risk-rated "substandard" or worse are evaluated on an individual loan basis for impairment. For non-impaired commercial real estate loans, loss factors are applied to outstanding loans by risk rating for each of the three classes in the portfolio. The factors applied are based primarily on historic loan loss experience and an assessment of internal and external factors and other relevant information.

Commercial Loans and Leases—As of March 31, 2018, loans and leases outstanding in the three classes within this segment expressed as a percent of total loans and leases outstanding were as follows: commercial loans and leases -- 12.5%; equipment financing loans -- 14.6%; and loans to condominium associations -- 0.9%.

Loans and leases in this portfolio that are on nonaccrual status and/or risk-rated "substandard" or worse are evaluated on an individual basis for impairment. For non-impaired commercial loans and leases, loss factors are applied to outstanding loans by risk rating for each of the three classes in the portfolio.

Consumer Loans—As of March 31, 2018, loans outstanding within the three classes within this segment expressed as a percent of total loans and leases outstanding were as follows: residential mortgage loans -- 12.6%, home equity loans -- 6.0%, and other consumer loans -- 0.5%.

Significant risk characteristics related to the residential mortgage and home equity loan portfolios are the geographic concentration of the properties financed within selected communities in the greater Boston and Providence metropolitan areas. The payment status and loan-to-value ratio are the primary credit quality indicators used for residential mortgage loans and home equity loans. Generally, loans are not made when the loan-to-value ratio exceeds 80% unless private mortgage insurance is obtained and/or there is a financially strong guarantor. Consumer loans that become 90 days or more past due, or are placed on nonaccrual.

Impaired Loans and Leases

A loan is considered to be impaired when, based on current information and events, it is probable that the Company will be unable to collect all amounts due (both interest and principal) according to the contractual terms of the loan agreement. The Company has defined the population of impaired loans to include nonaccrual loans and troubled debt restructured ("TDR") loans.

When the ultimate collectability of the total principal of an impaired loan or lease is in doubt and the loan is on nonaccrual status, all payments are applied to principal, under the cost recovery method. When the ultimate collectability of the total principal of an impaired loan or lease is not in doubt and the loan or lease is on nonaccrual status, contractual interest is credited to interest income when received, under the cash basis method.

The following tables include the recorded investment and unpaid principal balances of impaired loans and leases with the related allowance amount, if applicable, for the originated and acquired loan and lease portfolios at the dates indicated. Also presented are the average recorded investments in the impaired loans and leases and the related amount of interest recognized during the period that the impaired loans were impaired.

	At March 31, 2018						At December 31, 2017
	Recorded Investment (1)		Unpaid Principal Balance		Related Allowance		Recorded Investment (2)		Unpaid Principal Balance		Related Allowance
	(In Thousands)
Originated:
With no related allowance recorded:
Commercial real estate	$	7,962	$	7,946	$	—	$	9,978	$	9,962	$	—
Commercial	27,032		27,027		—		24,906		25,040		—
Consumer	3,338		3,330		—		3,508		3,500		—
Total originated with no related allowance recorded	38,332		38,303		—		38,392		38,502		—
With an allowance recorded:
Commercial real estate	—		—		—		3,056		3,056		—
Commercial	7,953		7,942		2,509		8,912		8,862		3,105
Consumer	134		134		18		—		—		—
Total originated with an allowance recorded	8,087		8,076		2,527		11,968		11,918		3,105
Total originated impaired loans and leases	46,419		46,379		2,527		50,360		50,420		3,105
Acquired:
With no related allowance recorded:
Commercial real estate	10,676		10,676		—		1,880		1,880		—
Commercial	1,607		1,607		—		1,594		1,594		—
Consumer	4,839		4,839		—		4,736		4,736		—
Total acquired with no related allowance recorded	17,122		17,122		—		8,210		8,210		—
With an allowance recorded:
Consumer	114		114		22		115		115		22
Total acquired with an allowance recorded	114		114		22		115		115		22
Total acquired impaired loans and leases	17,236		17,236		22		8,325		8,325		22
Total impaired loans and leases	$	63,655	$	63,615	$	2,549	$	58,685	$	58,745	$	3,127

___________________________________________________________________________

(1) Includes originated and acquired nonaccrual loans of $23.8 million and $2.1 million, respectively as of March 31, 2018.

(2) Includes originated and acquired nonaccrual loans of $24.9 million and $2.0 million, respectively as of December 31, 2017.

	Three Months Ended
	March 31, 2018				March 31, 2017
	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
	(In Thousands)
Originated:
With no related allowance recorded:
Commercial real estate	$	7,985	$	30	$	9,363	$	32
Commercial	27,761		272		21,058		164
Consumer	3,353		13		5,306		16
Total originated with no related allowance recorded	39,099		315		35,727		212
With an allowance recorded:
Commercial real estate	—		—		4,000		48
Commercial	7,993		16		22,322		1
Consumer	134		1		—		—
Total originated with an allowance recorded	8,127		17		26,322		49
Total originated impaired loans and leases	47,226		332		62,049		261
Acquired:
With no related allowance recorded:
Commercial real estate	10,681		1		9,419		19
Commercial	1,624		4		2,934		10
Consumer	4,860		15		6,133		16
Total acquired with no related allowance recorded	17,165		20		18,486		45
With an allowance recorded:
Commercial real estate	—		—		—		—
Commercial	—		—		—		—
Consumer	114		1		168		1
Total acquired with an allowance recorded	114		1		168		1
Total acquired impaired loans and leases	17,279		21		18,654		46
Total impaired loans and leases	$	64,505	$	353	$	80,703	$	307

The following tables present information regarding impaired and non-impaired loans and leases at the dates indicated:

	At March 31, 2018
	Commercial Real Estate		Commercial		Consumer		Total
	(In Thousands)
Allowance for Loan and Lease Losses:
Originated:
Individually evaluated for impairment	$	—	$	2,509	$	18	$	2,527
Collectively evaluated for impairment	26,674		23,613		4,990		55,277
Total originated loans and leases	26,674		26,122		5,008		57,804
Acquired:
Individually evaluated for impairment	—		—		22		22
Collectively evaluated for impairment	104		12		15		131
Acquired with deteriorated credit quality	583		118		56		757
Total acquired loans and leases	687		130		93		910
Total allowance for loan and lease losses	$	27,361	$	26,252	$	5,101	$	58,714
Loans and Leases:
Originated:
Individually evaluated for impairment	$	7,959	$	30,561	$	3,406	$	41,926
Collectively evaluated for impairment	2,998,538		1,637,524		954,236		5,590,298
Total originated loans and leases	3,006,497		1,668,085		957,642		5,632,224
Acquired:
Individually evaluated for impairment	—		1,447		1,964		3,411
Collectively evaluated for impairment	139,761		33,145		169,453		342,359
Acquired with deteriorated credit quality	94,000		4,325		38,142		136,467
Total acquired loans and leases	233,761		38,917		209,559		482,237
Total loans and leases	$	3,240,258	$	1,707,002	$	1,167,201	$	6,114,461

	At December 31, 2017
	Commercial Real Estate		Commercial		Consumer		Total
	(In Thousands)
Allowance for Loan and Lease Losses:
Originated:
Individually evaluated for impairment	$	—	$	3,105	$	—	$	3,105
Collectively evaluated for impairment	26,366		23,078		5,003		54,447
Total originated loans and leases	26,366		26,183		5,003		57,552
Acquired:
Individually evaluated for impairment	—		—		22		22
Collectively evaluated for impairment	145		13		17		175
Acquired with deteriorated credit quality	601		137		105		843
Total acquired loans and leases	746		150		144		1,040
Total allowance for loan and lease losses	$	27,112	$	26,333	$	5,147	$	58,592
Loans and Leases:
Originated:
Individually evaluated for impairment	$	13,031	$	29,386	$	3,070	$	45,487
Collectively evaluated for impairment	2,932,420		1,582,032		930,683		5,445,135
Total originated loans and leases	2,945,451		1,611,418		933,753		5,490,622
Acquired:
Individually evaluated for impairment	—		1,487		1,867		3,354
Collectively evaluated for impairment	34,244		6,399		55,921		96,564
Acquired with deteriorated credit quality	96,082		4,807		39,250		140,139
Total acquired loans and leases	130,326		12,693		97,038		240,057
Total loans and leases	$	3,075,777	$	1,624,111	$	1,030,791	$	5,730,679

Troubled Debt Restructured Loans and Leases

A specific valuation allowance for losses on TDR loans is determined by comparing the net carrying amount of the TDR loan with the restructured loan's cash flows discounted at the original effective rate.

The following table sets forth information regarding TDR loans and leases at the dates indicated:

	At March 31, 2018		At December 31, 2017
	(In Thousands)
Troubled debt restructurings:
On accrual	$	14,294	$	16,241
On nonaccrual	8,610		9,770
Total troubled debt restructurings	$	22,904	$	26,011

Total TDR loans and leases decreased by $3.1 million to $22.9 million at March 31, 2018 from

$26.0 million at December 31, 2017, primarily driven by the payoff of a commercial real estate relationship.

The recorded investment in TDR loans and the associated specific allowances for loan and lease losses, in the originated and acquired loan and lease portfolios, that were modified during the periods indicated, are as follows.

	At and for the Three Months Ended March 31, 2018
		Recorded Investment				Specific Allowance for Loan and Lease Losses						Defaulted (1)
	Number of Loans/ Leases	At Modification		At End of Period				Nonaccrual Loans and Leases		Additional Commitment		Number of Loans/ Leases	Recorded Investment
	(Dollars in Thousands)
Originated:
Commercial	6	$	635	$	635	$	41	$	635	$	—	1	$	929
Equipment financing	6	1,555		1,555		—		—		—		—	—
Total originated	12	$	2,190	$	2,190	$	41	$	635	$	—	1	$	929

______________________________________________________________________

(1) Includes loans and leases that have been modified within the past twelve months and subsequently had payment defaults during the period indicated.

There were no acquired loans and leases that met the definition of a TDR during the three months ended March 31, 2018.

	At and for the Three Months Ended March 31, 2017
		Recorded Investment				Specific Allowance for Loan and Lease Losses						Defaulted (1)
	Number of Loans/ Leases	At Modification		At End of Period				Nonaccrual Loans and Leases		Additional Commitment		Number of Loans/ Leases	Recorded Investment
	(Dollars in Thousands)
Originated:
Commercial	3	$	765	$	765	$	364	$	741	$	—	3	$	800
Total originated	3	$	765	$	765	$	364	$	741	—		3	$	800

______________________________________________________________________

(1) Includes loans and leases that have been modified within the past twelve months and subsequently had payment defaults during the period indicated.

There were no acquired loans and leases that met the definition of a TDR during the three months ended March 31, 2017.

The following table sets forth the Company's end-of-period balances for TDRs that were modified during the periods indicated, by type of modification.

	Three Months Ended March 31,
	2018		2017
	(In Thousands)
Loans with one modification:
Adjusted principal	$	—	$	375
Combination maturity, principal, interest rate	2,190		390
Total loans with one modification	$	2,190	$	765

The TDR loans and leases that were modified for the three months endedMarch 31, 2018 and 2017 were $2.2 million and $0.8 million, respectively. The increase in TDR loans and leases that were modified for the three months endedMarch 31, 2018 was primarily due to the modification of loans and leases secured by taxi medallions and one equipment financing relationship.

There were no TDR loans and leases with more than one modification during the three months endedMarch 31, 2018 and 2017.

The net charge-offs of the performing and nonperforming TDR loans and leases for the three months endedMarch 31, 2018 were $103 thousand driven by the charge-off of two commercial loans secured by taxi medallions. The net recoveries for performing and nonperforming TDR loans and leases for the three months endedMarch 31, 2017 were $7 thousand.

As of March 31, 2018 and 2017, there were no commitments to lend funds to debtors owing receivables whose terms had been modified in TDRs.

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Goodwill and Other Intangible Assets

3 Months Ended

Mar. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangible Assets

Goodwill and Other Intangible Assets

The following table sets forth the carrying value of goodwill and other intangible assets at the dates indicated:

	At March 31, 2018		At December 31, 2017
	(In Thousands)
Goodwill	$	137,890	$	137,890
Additions	23,006		—
Balance at end of period	160,896		137,890
Other intangible assets:
Core deposits	6,608		4,955
Trade name	1,089		1,089
Total other intangible assets	7,697		6,044
Total goodwill and other intangible assets	$	168,593	$	143,934

The addition of goodwill and the increase in core deposit intangibles, at March 31, 2018 are due to the excess of the purchase paid over the fair value of the net assets acquired from the First Commons Bank acquisition.

At December 31, 2013, the Company concluded that the BankRI name would continue to be utilized in its marketing strategies; therefore, the trade name with carrying value of $1.1 million, has an indefinite life and ceased to amortize.

The weighted-average amortization period for the CDI is 8.5 years.

The estimated aggregate future amortization expense (in thousands) for other intangible assets for each of the next five years and thereafter is as follows:

Remainder of 2018	$	1,691
Year ending:
2019	1,682
2020	1,247
2021	839
2022	486
2023	256
Thereafter	407
Total	$	6,608

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Accumulated Other Comprehensive Income (Loss)

3 Months Ended

Mar. 31, 2018

Equity [Abstract]

Accumulated Other Comprehensive Income (Loss)

Accumulated Other Comprehensive Income (Loss)

For the three months endedMarch 31, 2018 and 2017, the Company’s accumulated other comprehensive income (loss) includes the following two components: (i) unrealized holding gains (losses) on investment securities available-for-sale; and (ii) adjustment of accumulated obligation for postretirement benefits.

Changes in accumulated other comprehensive income (loss) by component, net of tax, were as follows for the periods indicated:

	Three Months Ended March 31, 2018
	Investment Securities Available-for-Sale			Postretirement Benefits		Accumulated Other Comprehensive Loss
	(In Thousands)
Balance at December 31, 2017	$	(6,113	)	$	163	$	(5,950	)
Other comprehensive income	(5,716		)	—		(5,716		)
Balance at March 31, 2018	$	(11,829	)	$	163	$	(11,666	)

	Three Months Ended March 31, 2017
	Investment Securities Available-for-Sale			Postretirement Benefits		Accumulated Other Comprehensive Loss
	(In Thousands)
Balance at December 31, 2016	$	(4,213	)	$	395	$	(3,818	)
Other comprehensive income	557			—		557
Balance at March 31, 2017	$	(3,656	)	$	395	$	(3,261	)

The Company did not reclassify any amounts out of accumulated other comprehensive income (loss) for the three months endedMarch 31, 2018 and 2017.

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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

Derivatives and Hedging Activities

The Company utilizes loan level derivatives which consist of interest-rate contracts (swaps, caps and floors), and risk participation agreements as part of the Company's interest-rate risk management strategy for certain assets and liabilities and not for speculative purposes. Based on the Company's intended use for the loan level derivatives at inception, the Company designates the derivative as either an economic hedge of an asset or liability, or a hedging instrument subject to the hedge accounting provisions of FASB ASC Topic 815, "Derivatives and Hedging".

Interest-rate swap, cap and floor agreements are entered into as hedges against future interest-rate fluctuations on specifically identified assets or liabilities. The Company did not have derivative fair value hedges or derivative cash flow hedges as of March 31, 2018 or December 31, 2017.

Derivatives not designated as hedges are not speculative but rather result from a service the Company provides to certain customers for a fee. The Company executes loan level derivative products such as interest-rate swap agreements with commercial banking customers to aid them in managing their interest-rate risk. The interest-rate swap contracts allow the commercial banking customers to convert floating-rate loan payments to fixed-rate loan payments. The Company concurrently enters into offsetting swaps with a third party financial institution, effectively minimizing its net risk exposure resulting from such transactions. The third-party financial institution exchanges the customer's fixed-rate loan payments for floating-rate loan payments. As the interest-rate swap agreements associated with this program do not meet hedge accounting requirements, changes in the fair value are recognized directly in earnings.

The Company utilizes risk participation agreements with other banks participating in commercial loan arrangements. Participating banks guarantee the performance on borrower-related interest rate swap contracts. Risk participation agreements are derivative financial instruments and are recorded at fair value. These derivatives are not designated as hedges and therefore, changes in fair value are recorded directly through earnings at each reporting period.

Under a risk participation-out agreement, a derivative asset, the Company participates out a portion of the credit risk associated with the interest rate swap position executed with the commercial borrower, for a fee paid to the participating bank. Under a risk participation-in agreement, a derivative liability, the Company assumes, or participates in, a portion of the credit risk associated with the interest rate swap position with the commercial borrower, for a fee received from the other bank.

The Company offers foreign exchange contracts to commercial borrowers to accommodate their business needs. These foreign exchange contracts do not qualify as hedges for accounting purposes. To mitigate the market and liquidity risk associated with these foreign exchange contracts, the Company enters into similar offsetting positions.

Asset derivatives and liability derivatives are included in other assets and accrued expenses and other liabilities on the unaudited consolidated balance sheets.

The following tables presents the Company's customer related derivative positions for the periods indicated below for those derivatives not designated as hedging.

	Notional Amount Maturing
	Number of Positions	Less than 1 year		Less than 2 years		Less than 3 years		Less than 4 years		Thereafter		Total		Fair Value
	March 31, 2018
	(Dollars In Thousands)
Loan level derivatives
Receive fixed, pay variable	66	$	3,872	$	2,010	$	27,607	$	—	$	504,205	$	537,694	$	13,594
Pay fixed, receive variable	66	3,872		2,010		27,607		—		504,205		537,694		13,594
Risk participation-out agreements	8	—		—		8,495		—		28,667		37,162		43
Risk participation-in agreements	1	—		—		—		—		3,825		3,825		7
Foreign exchange contracts
Buys foreign currency, sells U.S. currency	18	$	1,330	$	—	$	—	$	—	$	—	$	1,330	$	65
Sells foreign currency, buys U.S. currency	36	1,335		—		—		—		—		1,335		60

	Notional Amount Maturing
	Number of Positions	Less than 1 year		Less than 2 years		Less than 3 years		Less than 4 years		Thereafter		Total		Fair Value
	December 31, 2017
	(Dollars In Thousands)
Loan level derivatives
Receive fixed, pay variable	66	$	3,903	$	2,036	$	27,992	$	—	$	460,728	$	494,659	$	8,865
Pay fixed, receive variable	66	3,903		2,036		27,992		—		460,728		494,659		8,865
Risk participation-out agreements	8	—		—		8,613		—		28,014		36,627		65
Risk participation-in agreements	1	—		—		—		—		3,825		3,825		10
Foreign exchange contracts
Buys foreign currency, sells U.S. currency	22	$	1,495	$	—	$	—	$	—	$	—	$	1,495	$	65
Sells foreign currency, buys U.S. currency	44	1,502		—		—		—		—		1,502		72

Certain derivative agreements contain provisions that require the Company to post collateral if the derivative exposure exceeds a threshold amount. The Company posted collateral to dealer counterparties of $25.5 million and $26.7 million in the normal course of business as of March 31, 2018 and December 31, 2017, respectively. Dealer counterparties posted $0.5 million to the Company in the normal course of business as of March 31, 2018 compared to no collateral as of December 31, 2017.

The tables below present the offsetting of derivatives and amounts subject to master netting agreements not offset in the unaudited consolidated balance sheet at the dates indicated.

	At March 31, 2018
	Gross Amounts Recognized		Gross Amounts Offset in the Statement of Financial Position		Net Amounts  Presented in the Statement of Financial Position		Gross Amounts Not Offset in the Statement of Financial Position				Net Amount
							Financial Instruments Pledged		Cash Collateral Pledged
	(In Thousands)
Asset derivatives
Loan level derivatives	$	13,594	$	—	$	13,594	$	—	$	530	$	13,064
Risk participation-out agreements	43		—		43		—		—		43
Foreign exchange contracts	65		—		65		—		—		65
Total	$	13,702	$	—	$	13,702	$	—	$	530	$	13,172
Liability derivatives
Loan level derivatives	$	13,594	$	—	$	13,594	$	24,017	$	1,510	$	—
Risk participation-in agreements	7		—		7		—		—		7
Foreign exchange contracts	60		—		60		—		—		60
Total	$	13,661	$	—	$	13,661	$	24,017	$	1,510	$	67

	At December 31, 2017
	Gross Amounts Recognized		Gross Amounts Offset in the Statement of Financial Position		Net Amounts  Presented in the Statement of Financial Position		Gross Amounts Not Offset in the Statement of Financial Position				Net Amount
							Financial Instruments Pledged		Cash Collateral Pledged
	(In Thousands)
Asset derivatives
Loan level derivatives	$	8,865	$	—	$	8,865	$	—	$	—	$	8,865
Risk participation-out agreements	65		—		65		—		—		65
Foreign exchange contracts	72		—		72		—		—		72
Total	$	9,002	$	—	$	9,002	$	—	$	—	$	9,002
Liability derivatives
Loan level derivatives	$	8,865	$	—	$	8,865	$	25,159	$	1,510	$	—
Risk participation-in agreements	10		—		10		—		—		—
Foreign exchange contracts	65		—		65		—		—		—
Total	$	8,940	$	—	$	8,940	$	25,159	$	1,510	$	—

The Company has agreements with certain of its derivative counterparties that contain credit-risk-related contingent provisions. These provisions provide the counterparty with the right to terminate its derivative positions and require the Company to settle its obligations under the agreements if the Company defaults on certain of its indebtedness or if the Company fails to maintain its status as a well-capitalized institution.

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Stock Based Compensation

3 Months Ended

Mar. 31, 2018

Retirement Benefits [Abstract]

Stock Based Compensation

Stock Based Compensation

As of March 31, 2018, the Company had three active recognition and retention plans: the 2003 Recognition and Retention Plan (the "2003 RRP") with 1,250,000 authorized shares, the 2011 Restricted Stock Award Plan ("2011 RSA") with 500,000 authorized shares and the 2014 Equity Incentive Plan ("2014 Plan") with 1,750,000 authorized shares. The 2003 RRP, the 2011 RSA and the 2014 Plan are collectively referred to as the "Plans". The purpose of the Plans is to promote the long-term financial success of the Company and its subsidiaries by providing a means to attract, retain and reward individuals who contribute to such success and to further align their interests with those of the Company's stockholders.

Of the awarded shares, generally 50% vest ratably over three years with one-third of such shares vesting at each of the first, second and third anniversary dates of the awards. These are referred to as "time-based shares". The remaining 50% of each award has a cliff vesting schedule and will vest three years after the award date based on the level of the Company's achievement of identified performance targets in comparison to the level of achievement of such identified performance targets by a defined peer group comprised of 17 financial institutions. These are referred to as "performance-based shares". If a participant leaves the Company prior to the third anniversary date of an award, any unvested shares are forfeited. Dividends declared with respect to shares awarded will be held by the Company and paid to the participant only when the shares vest.

Under all the Plans, shares of the Company's common stock were reserved for issuance as restricted stock awards to officers, employees, and non-employee directors of the Company. Shares issued upon vesting may be either authorized but unissued shares or reacquired shares held by the Company as treasury shares. Any shares not issued because vesting requirements are not met will be retired back to treasury and be made available again for issuance under the Plans.

During the three months endedMarch 31, 2018, and 2017, no shares were issued upon satisfaction of required conditions of the Plans.

Total expense for the Plans was $0.7 million and $0.6 million for the three months ended March 31, 2018 and 2017, respectively.

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Earnings per Share (EPS)

3 Months Ended

Mar. 31, 2018

Earnings Per Share [Abstract]

Earnings per Share (EPS)

Earnings per Share ("EPS")

The following table is a reconciliation of basic EPS and diluted EPS:

	Three Months Ended
	March 31, 2018				March 31, 2017
	Basic		Fully Diluted		Basic		Fully Diluted
	(Dollars in Thousands, Except Per Share Amounts)
Numerator:
Net income	$	18,633	$	18,633	$	13,445	$	13,445
Denominator:
Weighted average shares outstanding	77,879,593		77,879,593		70,386,766		70,386,766
Effect of dilutive securities	—		288,207		—		457,330
Adjusted weighted average shares outstanding	77,879,593		78,167,800		70,386,766		70,844,096
EPS	$	0.24	$	0.24	$	0.19	$	0.19

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Fair Value of Financial Instruments

3 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

Fair Value of Financial Instruments

Fair Value of Financial Instruments

A description of the valuation methodologies used for assets and liabilities measured at fair value on a recurring and non-recurring basis, as well as the general classification of such instruments pursuant to the valuation hierarchy, is set forth below. There were no changes in the valuation techniques used during the three months endedMarch 31, 2018 and 2017.

Assets and Liabilities Recorded at Fair Value on a Recurring Basis

The following tables set forth the carrying value of assets and liabilities measured at fair value on a recurring basis at the dates indicated:

	Carrying Value as of March 31, 2018
	Level 1		Level 2		Level 3		Total
	(In Thousands)
Assets:
Investment securities available-for-sale:
GSE debentures	$	—	$	180,968	$	—	$	180,968
GSE CMOs	—		119,697		—		119,697
GSE MBSs	—		192,185		—		192,185
SBA commercial loan asset-backed securities	—		69		—		69
Corporate debt obligations	—		55,872		—		55,872
U.S. Treasury bonds	—		8,597		—		8,597
Trust preferred securities	—		—		—		—
Marketable equity securities	969		—		—		969
Total investment securities available-for-sale	$	969	$	557,388	$	—	$	558,357
Loan level derivatives	$	—	$	13,594	$	—	$	13,594
Risk participation-out agreements	—		43		—		43
Foreign exchange contracts	—		65		—		65
Liabilities:
Loan level derivatives	$	—	$	13,594	$	—	$	13,594
Risk participation-in agreements	—		7		—		7
Foreign exchange contracts	—		60		—		60

	Carrying Value as of December 31, 2017
	Level 1		Level 2		Level 3		Total
	(In Thousands)
Assets:
Investment securities available-for-sale:
GSE debentures	$	—	$	149,924	$	—	$	149,924
GSE CMOs	—		127,022		—		127,022
GSE MBSs	—		189,313		—		189,313
SBA commercial loan asset-backed securities	—		72		—		72
Corporate debt obligations	—		62,683		—		62,683
U.S. Treasury bonds	—		8,730		—		8,730
Trust preferred securities	—		1,398		—		1,398
Marketable equity securities	982		—		—		982
Total investment securities available-for-sale	$	982	$	539,142	$	—	$	540,124
Loan level derivatives	$	—	$	8,865	$	—	$	8,865
Risk participation-out agreements	—		65		—		65
Foreign exchange contracts	—		72		—		72
Liabilities:
Loan level derivatives	$	—	$	8,865	$	—	$	8,865
Risk participation-in agreements	—		10		—		10
Foreign exchange contracts	—		65		—		65

Investment Securities Available-for-Sale

The fair value of investment securities is based principally on market prices and dealer quotes received from third-party and nationally-recognized pricing services for identical investment securities such as U.S. Treasury and agency securities. The Company's marketable equity securities are priced this way and are included in Level 1. These prices are validated by comparing the primary pricing source with an alternative pricing source when available. When quoted market prices for identical securities are unavailable, the Company uses market prices provided by independent pricing services based on recent trading activity and other observable information, including but not limited to market interest-rate curves, referenced credit spreads and estimated prepayment speeds where applicable. These investments include GSE debentures, GSE mortgage-related securities, SBA commercial loan asset backed securities, corporate debt securities, and trust preferred securities, all of which are included in Level 2. As of March 31, 2018 and December 31, 2017, no investment securities were valued using pricing models included in Level 3.

Additionally, management reviews changes in fair value from period to period and performs testing to ensure that prices received from the third parties are consistent with management's expectation of the market. Changes in the prices obtained from the pricing service are analyzed from month to month, taking into consideration changes in market conditions including changes in mortgage spreads, changes in U.S. Treasury security yields and changes in generic pricing of 15-year and 30-year securities. Additional analysis may include a review of prices provided by other independent parties, a yield analysis, a review of average life changes using Bloomberg analytics and a review of historical pricing for a particular security.

Derivatives and Hedging Instruments

The fair values for the interest-rate swap assets and liabilities, risk participation agreements (RPA in/out), and foreign exchange derivatives represent a Level 2 valuation and are based on settlement values adjusted for credit risks associated with the counterparties and the Company and observable market interest rate curves and foreign exchange rates where applicable. Credit risk adjustments consider factors such as the likelihood of default by the Company and its counterparties, its netexposures and remaining contractual life. To date, the Company has not realized any losses due to a counterparty's inability to pay any net uncollateralized position. Refer also to Note 8, "Derivatives and Hedging Activities."

There were no transfers between levels for assets and liabilities recorded at fair value on a recurring basis during the three months endedMarch 31, 2018 and 2017, respectively.

Assets and Liabilities Recorded at Fair Value on a Non-Recurring Basis

Assets and liabilities measured at fair value on a non-recurring basis are summarized below at the dated indicated:

	Carrying Value as of March 31, 2018
	Level 1		Level 2		Level 3		Total
	(In Thousands)
Assets measured at fair value on a non-recurring basis:
Collateral-dependent impaired loans and leases	$	—	$	—	$	17,284	$	17,284
OREO	—		—		3,235		3,235
Repossessed assets	—		728		—		728
Total assets measured at fair value on a non-recurring basis	$	—	$	728	$	20,519	$	21,247

	Carrying Value as of December 31, 2017
	Level 1		Level 2		Level 3		Total
	(In Thousands)
Assets measured at fair value on a non-recurring basis:
Collateral-dependent impaired loans and leases	$	—	$	—	$	21,195	$	21,195
OREO	—		—		3,235		3,235
Repossessed assets	—		1,184		—		1,184
Total assets measured at fair value on a non-recurring basis	$	—	$	1,184	$	24,430	$	25,614

Collateral-Dependent Impaired Loans and Leases

For nonperforming loans and leases where the credit quality of the borrower has deteriorated significantly, fair values of the underlying collateral were estimated using purchase and sales agreements (Level 2), or comparable sales or recent appraisals (Level 3), adjusted for selling costs and other expenses.

Other Real Estate Owned

The Company records OREO at the lower of cost or fair value. In estimating fair value, the Company utilizes purchase and sales agreements (Level 2) or comparable sales, recent appraisals or cash flows discounted at an interest rate commensurate with the risk associated with these cash flows (Level 3), adjusted for selling costs and other expenses.

Repossessed Assets

Repossessed assets are carried at estimated fair value less costs to sell based on auction pricing (Level 2).

The table below presents quantitative information about significant unobservable inputs (Level 3) for assets measured at fair value on a recurring basis at the dates indicated.

	Fair Value				Valuation Technique
	At March 31, 2018		At December 31, 2017
	(Dollars in Thousands)
Collateral-dependent impaired loans and leases	$	17,284	$	21,195	Appraisal of collateral (1)
Other real estate owned	3,235		3,235		Appraisal of collateral (1)

_______________________________________________________________________________

⁽¹⁾ Fair value is generally determined through independent appraisals of the underlying collateral. The Company may also use another available source of collateral assessment to determine a reasonable estimate of the fair value of the collateral. Appraisals may be adjusted by management for qualitative factors such as economic factors and estimated liquidation expenses. The range of the unobservable inputs used may vary but is generally 0% - 10% on the discount for costs to sell and 0% - 15% on appraisal adjustments.

Summary of Estimated Fair Values of Financial Instruments

The following table presents the carrying amount, estimated fair value, and placement in the fair value hierarchy of the Company's financial instruments at the dates indicated. This table excludes financial instruments for which the carrying amount approximates fair value. Financial assets for which the fair value approximates carrying value include cash and cash equivalents, restricted equity securities, and accrued interest receivable. Financial liabilities for which the fair value approximates carrying value include non-maturity deposits, short-term borrowings, and accrued interest payable.

					Fair Value Measurements
	Carrying Value		Estimated Fair Value		Level 1 Inputs		Level 2 Inputs		Level 3 Inputs
	(In Thousands)
At March 31, 2018
Financial assets:
Investment securities held-to-maturity:
GSE debentures	$	50,529	$	49,175	$	—	$	49,175	$	—
GSE MBSs	13,344		13,004		—		13,004		—
Municipal obligations	52,979		52,134		—		52,134		—
Foreign government obligations	500		497		—		—		497
Loans held-for-sale	756		756		—		756		—
Loans and leases, net	6,055,747		5,947,840		—		—		5,947,840
Restricted equity securities	66,164		66,164		—		—		66,164
Financial liabilities:
Certificates of deposit	1,361,722		1,346,500		—		1,346,500		—
Borrowed funds	1,099,429		1,075,857		—		1,075,857		—

					Fair Value Measurements
	Carrying Value		Estimated Fair Value		Level 1 Inputs		Level 2 Inputs		Level 3 Inputs
	(In Thousands)
At December 31, 2017
Financial assets:
Investment securities held-to-maturity:
GSE debentures	$	41,612	$	40,801	$	—	$	40,801	$	—
GSE MBSs	13,923		13,705		—		13,705		—
Municipal obligations	53,695		53,517		—		53,517		—
Foreign government obligations	500		500		—		—		500
Loans held-for-sale	2,628		2,628		—		2,628		—
Loans and leases, net	5,672,087		5,594,543		—		—		5,594,543
Restricted equity securities	59,369		59,369		—		—		59,369
Financial liabilities:
Certificates of deposit	1,207,470		1,198,201		—		1,198,201		—
Borrowed funds	1,020,819		995,335		—		995,335		—

Investment Securities Held-to-Maturity

The fair values of certain investment securities held-to-maturity are estimated using market prices provided by independent pricing services based on recent trading activity and other observable information, including but not limited to market interest-rate curves, referenced credit spreads and estimated prepayment speeds where applicable. These investments include GSE debentures, GSE MBSs, and municipal obligations, all of which are included in Level 2. Additionally, fair values of foreign government obligations are estimated using pricing models and are considered to be Level 3.

Loans Held-for-Sale

Fair value is measured using quoted market prices when available. These assets are typically categorized as Level 1. If quoted market prices are not available, comparable market values may be utilized. These assets are typically categorized as Level 2.

Loans and Leases

The fair values of performing loans and leases was estimated by segregating the portfolio into its primary loan and lease categories—commercial real estate mortgage, multi-family mortgage, construction, commercial, equipment financing, condominium association, residential mortgage, home equity and other consumer. These categories were further disaggregated based upon significant financial characteristics such as type of interest rate (fixed / variable) and payment status (current / past-due). The Company discounts the contractual cash flows for each loan category using interest rates currently being offered for loans with similar terms to borrowers of similar quality and incorporates estimates of future loan prepayments.

Restricted Equity Securities

The fair values of certain restricted equity securities are estimated using observable inputs adjusted for other unobservable information, including but not limited to probability assumptions and similar discounts where applicable. These restricted equity securities are considered to be Level 3.

Deposits

The fair values of deposit liabilities with no stated maturity (demand, NOW, savings and money market savings accounts) are equal to the carrying amounts payable on demand. The fair value of certificates of deposit represents contractual cash flows discounted using interest rates currently offered on deposits with similar characteristics and remaining maturities. The fair value estimates for deposits do not include the benefit that results from the low-cost funding provided by the Company's core deposit relationships (deposit-based intangibles).

Borrowed Funds

The fair value of federal funds purchased is equal to the amount borrowed. The fair value of FHLBB advances and repurchase agreements represents contractual repayments discounted using interest rates currently available for borrowings with similar characteristics and remaining maturities. The fair values reported for retail repurchase agreements are based on the discounted value of contractual cash flows. The discount rates used are representative of approximate rates currently offered on borrowings with similar characteristics and maturities. The fair values reported for subordinated deferrable interest debentures are based on the discounted value of contractual cash flows. The discount rates used are representative of approximate rates currently offered on instruments with similar terms and maturities.

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Off-Balance Sheet Financial Instruments

The Company is party to off-balance sheet financial instruments in the normal course of business to meet the financing needs of its customers and to reduce its own exposure to fluctuations in interest rates. These financial instruments include loan commitments, standby and commercial letters of credits, and loan level derivatives. According to GAAP, these financial instruments are not recorded in the financial statements until they are funded or related fees are incurred or received.

The contract amounts reflect the extent of the involvement the Company has in particular classes of these instruments. Such commitments involve, to varying degrees, elements of credit risk and interest-rate risk in excess of the amount recognized in the consolidated balance sheets. The Company's exposure to credit loss in the event of non-performance by the counterparty is represented by the fair value of the instruments. The Company uses the same policies in making commitments and conditional obligations as it does for on-balance sheet instruments.

Financial instruments with off-balance-sheet risk at the dates indicated follow:

	At March 31, 2018		At December 31, 2017
	(In Thousands)
Financial instruments whose contract amounts represent credit risk:
Commitments to originate loans and leases:
Commercial real estate	$	34,112	$	76,653
Commercial	106,956		83,032
Residential mortgage	24,162		28,745
Unadvanced portion of loans and leases	608,440		571,668
Unused lines of credit:
Home equity	435,594		407,552
Other consumer	29,730		34,191
Other commercial	336		323
Unused letters of credit:
Financial standby letters of credit	9,972		12,422
Performance standby letters of credit	736		736
Commercial and similar letters of credit	184		184
Loan level derivatives (Notional principal amounts):
Receive fixed, pay variable	537,694		494,659
Pay fixed, receive variable	537,694		494,659
Risk participation-out agreements	37,162		36,627
Risk participation-in agreements	3,825		3,825
Foreign exchange contracts (Notional amounts):
Buys foreign currency, sells U.S. currency	1,330		1,495
Sells foreign currency, buys U.S. currency	1,335		1,502

Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require the payment of a fee by the customer. Since some of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Company evaluates each customer's creditworthiness on a case-by-case basis. The amount of collateral obtained, if any, is based on management's credit evaluation of the borrower.

Standby and commercial letters of credits are conditional commitments issued by the Company to guarantee performance of a customer to a third party. These standby and commercial letters of credit are primarily issued to support the financing needs of the Company's commercial customers. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loans to customers.

From time to time, the Company enters into loan level derivatives, risk participation agreements or foreign exchange contracts with commercial customers and third-party financial institutions. These derivatives allow the Company to offer long-term fixed-rate commercial loans while mitigating the interest-rate or foreign exchange risk of holding those loans. In a loan level derivative transaction, the Company lends to a commercial customer on a floating-rate basis and then enters into an loan level derivative with that customer. Concurrently, the Company enters into offsetting swaps with a third-party financial institution, effectively minimizing its net interest-rate risk exposure resulting from such transactions.

The fair value of derivative assets and liabilities was $13.7 million and $13.7 million, respectively, as of March 31, 2018. The fair value of derivative assets and liabilities was $9.1 million and $8.9 million, respectively, as of December 31, 2017.

The fair value of foreign exchange assets and liabilities was $65.0 thousand and $60.0 thousand, respectively, as of March 31, 2018. The fair value of foreign exchange assets and liabilities was $72.0 thousand and $65.0 thousand as of December 31, 2017.

Lease Commitments

The Company leases certain office space under various noncancellable operating leases. These leases have original terms ranging from 5 years to over 25 years. Certain leases contain renewal options and escalation clauses which can increase rental expenses based principally on the consumer price index and fair market rental value provisions.

Total lease commitments increased from $29,665 thousand as of December 31, 2017 to $31,004 thousand as of March 31, 2018. The increase is due to the addition of the leases of 2 former First Commons Bank branches and an ATM location, the opening of 2 new C&I lending offices in Braintree and Wakefield and the execution of a lease extension made for Eastern Funding. A summary of future minimum rental payments under such leases at the dates indicated follows:

	Minimum Rental Payments
	(In Thousands)
Remainder of 2018	$	4,323
Year ending:
2019	5,366
2020	4,691
2021	3,635
2022	2,807
2023	2,225
Thereafter	7,957
Total	$	31,004

Certain leases contain escalation clauses for real estate taxes and other expenditures, which are not included above. Total rental expense was $1.4 million and $1.4 million for the three months ended March 31, 2018 and 2017, respectively.

Legal Proceedings

In the normal course of business, there are various outstanding legal proceedings. In the opinion of management, after consulting with legal counsel, the consolidated financial position and results of operations of the Company are not expected to be affected materially by the outcome of such proceedings.

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Revenue from Contracts with Customers

3 Months Ended

Mar. 31, 2018

Revenue from Contract with Customer [Abstract]

Revenue from Contracts with Customers

Revenue from Contracts with Customers

Overview

Revenue from contracts with customers in the scope of Accounting Standards Codification (“ASC”) Topic 606 is measured based on the consideration specified in the contract with a customer and excludes amounts collected on behalf of third parties. The Company recognizes revenue from contracts with customers when it satisfies its performance obligations.

The Company’s performance obligations are generally satisfied as services are rendered and can either be satisfied at a point in time or over time. Unsatisfied performance obligations at the report date are not material to our consolidated financial statements.

In certain cases, other parties are involved with providing services to our customers. If the Company is a principal in the transaction (providing services itself or through a third party on its behalf), revenues are reported based on the gross consideration received from the customer and any related expenses are reported gross in noninterest expense. If the Company is an agent in the transaction (referring to another party to provide services), the Company reports its net fee or commission retained as revenue.

Accounting Policy Updates

The Company adopted Topic 606 “Revenue from Contracts with Customers” effective January 1, 2018 and has applied the guidance to all contracts within the scope of Topic 606 as of that date. As a result, the Company has modified its accounting policy for revenue recognition as detailed in this footnote.

As discussed in Note 1, the Company applied Topic 606 using the modified retrospective method, therefore, the prior period comparative information has not been adjusted and continues to be reported under Topic 605. There was no cumulative effect adjustment as of January 1, 2018, and there were no material changes to our consolidated financial statements at or for the three months ended March 31, 2018, as a result of adopting Topic 606.

The Company applied the practical expedient pertaining to contracts with original expected duration of one year or less and does not disclose information about remaining performance obligations on such contracts.

The Company also applied the practical expedient pertaining to contracts for which, at contract inception, the period between when the entity transfers the services and when the customer pays for those services will be one year or less. As such, the Company does not adjust the consideration from customers for the effects of a significant financing component.

A substantial portion of the Company’s revenue is specifically excluded from the scope of Topic 606. This exclusion is associated with financial instruments, including interest income on loans and investment securities, in addition to loan derivative income and gains on loan and investment sales. For the revenue that is in-scope of Topic 606, the following is a description of principal activities from which the Company generates its revenue from contracts with customers, separated by the timing of revenue recognition.

Revenue Recognized at a Point in Time

The Company recognizes revenue that is transactional in nature and such revenue is earned at a point in time. Revenue that is recognized at a point in time includes card interchange fees (fee income related to debit card transactions), ATM fees, wire transfer fees, overdraft charge fees, and stop-payment and returned check fees. Additionally, revenue is collected from loan fees, such as letters of credit, line renewal fees and application fees. Such revenue is derived from transactional information and is recognized as revenue immediately as the transactions occur or upon providing the service to complete the customer’s transaction.

Revenue Recognized Over Time

The Company recognizes revenue over a period of time, generally monthly, as services are performed and performance obligations are satisfied. Such revenue includes commissions on investments, insurance sales and service charges on deposit accounts. Fee revenue from service charges on deposit accounts represent the service charges assessed to customers who hold deposit accounts at the Bank.

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Basis of Presentation (Policies)

3 Months Ended

Mar. 31, 2018

Accounting Policies

Basis of Financial Statement Presentation

Basis of Financial Statement Presentation

The unaudited consolidated financial statements of the Company presented herein have been prepared pursuant to the rules of the Securities and Exchange Commission (“SEC”) for quarterly reports on Form 10-Q and do not include all of the information and note disclosures required by U.S. generally accepted accounting principles (“GAAP”). In the opinion of Management, all adjustments (consisting of normal recurring adjustments) and disclosures considered necessary for the fair presentation of the accompanying consolidated financial statements have been included. Interim results are not necessarily reflective of the results of the entire year. The accompanying unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Annual Report on Form 10-K for the fiscal year ended December 31, 2017. 

Consolidation

The unaudited consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All significant intercompany transactions and balances are eliminated in consolidation.

Use of Estimates

In preparing these consolidated financial statements, Management is required to make significant estimates and assumptions that affect the reported amounts of assets, liabilities, income, expenses and disclosure of contingent assets and liabilities. Actual results could differ from those estimates based upon changing conditions, including economic conditions and future events. Material estimates that are particularly susceptible to significant change in the near-term include the determination of the allowance for loan and lease losses, the determination of fair market values of assets and liabilities, including acquired loans and leases, the review of goodwill and intangibles for impairment and the review of deferred tax assets for valuation allowances.

The judgments used by Management in applying these critical accounting policies may be affected by a further and prolonged deterioration in the economic environment, which may result in changes to future financial results. For example, subsequent evaluations of the loan and lease portfolio, in light of the factors then prevailing, may result in significant changes in the allowance for loan and lease losses in future periods, and the inability to collect outstanding principal may result in increased loan and lease losses.

Reclassification

Reclassification

Certain previously reported amounts have been reclassified to conform to the current year's presentation.

Recent Accounting Pronouncements

Recent Accounting Pronouncements

In February 2018, FASB issued ASU 2018-03, Technical Corrections and Improvements to Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. This ASU was issued to add improvements to update ASU 2016-01 to increase stakeholders’ awareness of the amendments and to expedite the improvements. This ASU is effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years beginning after June 15, 2018. Public business entities with fiscal years beginning between December 15, 2017 and June 15, 2018, are not required to adopt these amendments until the interim period beginning after June 15, 2018, and public business entities with fiscal years beginning between June 15, 2018, and December 15, 2018, are not required to adopt these amendments before adopting the amendments in Update 2016-01. Management has determined that ASU 2018-03 does apply, but has not determined the impact, if any, as of March 31, 2018.

In February 2018, the FASB issued Accounting Standards Update (ASU) No. 2018-02, "Income Statement-Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income" was issued to address a narrow-scope financial reporting issue that arose as a consequence of the change in the tax law. On December 22, 2017, the U.S. federal government enacted a tax bill, H.R.1, An Act to Provide for Reconciliation Pursuant to Titles II and V of the Concurrent Resolution on the Budget for Fiscal Year 2018 (the “Tax Reform Act”). The ASU No. 2018-02 requires a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the newly enacted federal corporate income tax rate. The amount of the reclassification would be the difference between the historical corporate income tax rate of 35 percent and the newly enacted 21 percent corporate income tax rate. The ASU No. 2018-02 is effective for all entities for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years with early adoption permitted, including adoption in any interim period, for (i) public business entities for reporting periods for which financial statements have not yet been issued and (ii) all other entities for reporting periods for which financial statements have not yet been made available for issuance. The changes are required to be applied retrospectively to each period (or periods) in which the effect of the change in the U.S. federal corporate income tax rate in the Tax Cuts and Jobs Act of 2017 is recognized. Management early adopted this ASU as of December 31, 2017, which resulted in the reclassification from accumulated other comprehensive loss to retained earnings totaling $1.1 million, reflected in the Consolidated Statements of Changes in Stockholders' Equity.

In November 2017, the FASB issued ASU 2017-14, Income Statement-Reporting Comprehensive Income (Topic 220), Revenue Recognition (Topic 605), and Revenue from Contracts with Customers (Topic 606): Amendments to SEC Paragraphs Pursuant to Staff Accounting Bulletin No. 116 and SEC Release No. 33-10403. This ASU was issued to amend certain SEC paragraphs pursuant to the SEC Staff Accounting Bulletin No.116 and SEC Release No. 33-10403, which bring existing guidance into conformity with Topic 606, Revenue from Contract with Customers. The ASU was effective for annual periods beginning after December 15, 2017. Management has determined that this ASU does apply as of January 1, 2018 and has determined the impact to be immaterial as of March 31, 2018.

In May 2017, the FASB issued ASU 2017-09, Compensation-Stock Compensation (Topic 718): Scope of Modification Accounting. FASB issued this Update to address the diversity in practice as well as the cost and complexity when applying the guidance in Topic 718, Compensation - Stock Compensation, to a change to the terms or conditions of a share-based payment award. For public entities, this ASU is effective for annual reporting periods beginning after December 15, 2017. Management has determined that this ASU does apply as of January 1, 2018 and has determined the impact to be immaterial as of March 31, 2018.

In March 2017, the FASB issued Accounting Standards Update ASU 2017-07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost (Topic 715). This ASU was issued primarily to improve the presentation of net periodic pension cost and net periodic postretirement benefit cost. This ASU is effective for annual reporting periods beginning after December 15, 2017. Management has determined that this ASU does apply as of January 1, 2018 and has determined the impact to be immaterial as of March 31, 2018.

In January 2017, the FASB issued ASU 2017-04, Intangibles - Goodwill and Other (Topic 350). This ASU was issued to simplify the subsequent measurement of goodwill by eliminating Step 2 from the goodwill impairment test. For public entities, this ASU is effective for the fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted and application should be on a prospective basis. Management has evaluated this ASU and as of December 31, 2017, the Company has adopted the ASU and determined the impact to be immaterial as of March 31, 2018.

In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230). This ASU was issued to provide clarification and uniformity on the presentation and classification of certain cash receipts and cash payments in the statement of cash flows under Topic 230. Early adoption is permitted as of the fiscal years beginning after December 15, 2017, for public entities that file with the SEC. The Company adopted ASU 2016-15 effective January 1, 2017 and the adoption did not have a material impact on the Company’s consolidated financial statements.

In June 2016, the FASB issued ASU 2016-13, Financial instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. The intent of this ASU is to replace the current GAAP method of calculating credit losses. Current GAAP uses a higher threshold at which likely losses can be calculated and recorded. The new process will require institutions to account for likely losses that originally would not have been part of the calculation. The calculation will incorporate future forecasting in addition to historical and current measures. For public entities that file with the SEC, this ASU is effective for the fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. This ASU must be applied prospectively to debt securities marked as other than temporarily impaired. A retrospective approach will be applied cumulatively to retained earnings. Early adoption is permitted as of the fiscal years beginning after December 15, 2018. Management has determined that ASU 2016-13 does apply, but has not determined the impact, if any, as of March 31, 2018. In preparation for the adoption in 2020 of this ASU, management formed a steering committee to oversee the adoption of ASU 2016-13. The steering committee along with a project team has developed an approach for implementation and has selected a third party software service provider. The project team is in the testing phase of the third party software.

In March 2016, the FASB issued ASU 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. This ASU was issued as part of the FASB Simplification Initiative which intends to reduce the complexity of GAAP while improving usefulness to users. The ASU was effective for annual periods beginning after December 15, 2016, and interim periods within those annual reporting periods with early adoption available. The Company adopted ASU 2016-09 effective January 1, 2017 and the adoption did not have a material impact on the Company’s consolidated financial statements.

In February 2016, FASB issued ASU 2016-02, Leases. This ASU requires lessees to record most leases on their balance sheet but recognize expenses on their income statements in a manner similar to current accounting. This ASU also eliminates current real estate-specific provisions for all companies. For lessors, this ASU modifies the classification criteria and the accounting for sales-type and direct financing leases. This ASU is effective for fiscal years beginning after December 15, 2018, including interim periods therein. Early adoption is permitted. Management believes that this ASU applies and has not determined the impact, if any, as of March 31, 2018. Management has met to discuss the impact and will assemble a project team to assess steps required for adoption. The steps will include a review of third party lease software service providers.

In January 2016, the FASB issued ASU 2016-01, Financial Instruments. This ASU significantly revises an entity’s accounting related to (1) the classification and measurement of investments in equity securities and (2) the presentation of certain fair value changes for financial liabilities measured at fair value. It also amends certain disclosure requirements associated with the fair value of financial instruments. This ASU is effective for fiscal years beginning after December 15, 2017, including interim periods therein. Management has determined that ASU 2016-01 does apply as of January 1, 2018 and management has determined the impact to be immaterial as of March 31, 2018.

Accounting Standards Update No. 2014-09, “Revenue from Contracts with Customers” (“ASU 2014-09”), was issued in May 2014 and provides a revenue recognition framework for any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of non-financial assets unless those contracts are within the scope of other accounting standards. As issued, ASU 2014-09 was effective for annual periods beginning after December 15, 2016, including interim periods within that reporting period with early adoption not permitted. The standard permits the use of either the retrospective or cumulative effect transition method. In August 2015, Accounting Standards Update No. 2015-14, “Deferral of the Effective Date” (“ASU 2015-14”) was issued and delayed the effective date of ASU 2014-09 to annual and interim periods in fiscal years beginning after December 15, 2017. In 2016, Accounting Standards Update No. 2016-08, “Principal versus Agent Considerations” (“ASU 2016-08”), Accounting Standards Update No. 2016-10, “Identifying Performance Obligations and Licensing” (“ASU 2016-10”) and Accounting Standards Update No. 2016-12, “Narrow-Scope Improvements and Practical Expedients” (“ASU 2016-12”) were issued. These ASUs did not change the core principle for revenue recognition in Topic 606; instead, the amendments provided more detailed guidance in a few areas and additional implementation guidance and examples to reduce the degree of judgment necessary to comply with Topic 606. The effective date and transition requirements for ASU 2016-08, ASU 2016-10 and ASU 2016-12 were the same as those provided by ASU 2015-14. Management assembled a project team to address the changes pursuant to Topic 606. The project team completed a scope assessment and contract review for in-scope revenue streams. Topic 606 did not apply to several income generating streams. Management excluded from their analysis, income associated with financial instruments, gains on sale of investment securities and loans, gains on Low Income Housing Tax Credits ("LIHTC") and loan level derivative income. Revenue streams that were included were service charges on deposit accounts, loan fees, and income received through a third party relationship. Management adopted the provisions of ASU 2014-09 effective January 1, 2018, using the modified retrospective transition method. The adoption did not have a material impact on the Company's consolidated financial statements. See Note 13, "Revenue from Contracts with Customers," for further details.

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Acquisitions (Tables)

3 Months Ended

Mar. 31, 2018

Business Combinations [Abstract]

Summary of Acquisitions

	Net Assets Acquired at Fair Value
	(In Thousands)
ASSETS
Cash	$	42,995
Restricted stock	1,884
Loans	262,095
Premises and equipment	583
Goodwill	23,005
Core deposit and other intangibles	2,122
Other assets	2,336
Total assets acquired	335,020
LIABILITIES
Deposits	273,701
Borrowings	5,000
Other liabilities	287
Total liabilities assumed	278,988
Purchase price	$	56,032

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Investment Securities (Tables)

3 Months Ended

Mar. 31, 2018

Investments, Debt and Equity Securities [Abstract]

Schedule of securities available-for-sale securities

The following tables set forth investment securities available-for-sale and held-to-maturity at the dates indicated:

	At March 31, 2018
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(In Thousands)
Investment securities available-for-sale:
GSE debentures	$	184,760	$	71	$	3,863	$	180,968
GSE CMOs	125,061		18		5,382		119,697
GSE MBSs	197,083		231		5,129		192,185
SBA commercial loan asset-backed securities	70		—		1		69
Corporate debt obligations	56,784		5		917		55,872
U.S. Treasury bonds	8,794		—		197		8,597
Trust preferred securities	—		—		—		—
Marketable equity securities	980		6		17		969
Total investment securities available-for-sale	$	573,532	$	331	$	15,506	$	558,357
Investment securities held-to-maturity:
GSE debentures	$	50,529	$	4	$	1,358	$	49,175
GSEs MBSs	13,344		—		340		13,004
Municipal obligations	52,979		11		856		52,134
Foreign government obligations	500		—		3		497
Total investment securities held-to-maturity	$	117,352	$	15	$	2,557	$	114,810

	December 31, 2017
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(In Thousands)
Investment securities available-for-sale:
GSE debentures	$	151,483	$	70	$	1,629	$	149,924
GSE CMOs	131,082		27		4,087		127,022
GSE MBSs	191,281		354		2,322		189,313
SBA commercial loan asset-backed securities	73		—		1		72
Corporate debt obligations	62,811		110		238		62,683
U.S. Treasury bonds	8,785		7		62		8,730
Trust preferred securities	1,471		—		73		1,398
Marketable equity securities	978		13		9		982
Total investment securities available-for-sale	$	547,964	$	581	$	8,421	$	540,124
Investment securities held-to-maturity:
GSE debentures	$	41,612	$	—	$	811	$	40,801
GSEs MBSs	13,923		—		218		13,705
Municipal obligations	53,695		159		337		53,517
Foreign government obligations	500		—		—		500
Total investment securities held-to-maturity	$	109,730	$	159	$	1,366	$	108,523

Investment securities in a continuous unrealized loss position

Investment securities as of March 31, 2018 and December 31, 2017 that have been in a continuous unrealized loss position for less than twelve months or twelve months or longer are as follows:

	At March 31, 2018
	Less than Twelve Months				Twelve Months or Longer				Total
	Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses
	(In Thousands)
Investment securities available-for-sale:
GSE debentures	$	143,716	$	3,284	$	12,256	$	579	$	155,972	$	3,863
GSE CMOs	2,614		64		116,505		5,318		119,119		5,382
GSE MBSs	109,406		2,250		70,625		2,879		180,031		5,129
SBA commercial loan asset-backed securities	32		—		31		1		63		1
Corporate debt obligations	45,522		761		2,350		156		47,872		917
U.S. Treasury bonds	8,597		197		—		—		8,597		197
Trust preferred securities	—		—		—		—		—		—
Marketable equity securities	—		—		495		17		495		17
Temporarily impaired investment securities available-for-sale	309,887		6,556		202,262		8,950		512,149		15,506
Investment securities held-to-maturity:
GSE debentures	32,196		628		14,007		730		46,203		1,358
GSEs MBSs	1,872		34		11,081		306		12,953		340
Municipal obligations	42,717		591		6,644		265		49,361		856
Foreign government obligations	—		—		497		3		497		3
Temporarily impaired investment securities held-to-maturity	76,785		1,253		32,229		1,304		109,014		2,557
Total temporarily impaired investment securities	$	386,672	$	7,809	$	234,491	$	10,254	$	621,163	$	18,063

	December 31, 2017
	Less than Twelve Months				Twelve Months or Longer				Total
	Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses
	(In Thousands)
Investment securities available-for-sale:
GSE debentures	$	120,409	$	1,263	$	12,481	$	366	$	132,890	$	1,629
GSE CMOs	2,862		34		123,548		4,053		126,410		4,087
GSE MBSs	94,985		753		74,782		1,569		169,767		2,322
SBA commercial loan asset-backed securities	34		—		33		1		67		1
Corporate debt obligations	30,978		154		2,423		84		33,401		238
U.S. Treasury bonds	4,767		62		—		—		4,767		62
Trust preferred securities	—		—		1,398		73		1,398		73
Marketable equity securities	—		—		503		9		503		9
Temporarily impaired investment securities available-for-sale	254,035		2,266		215,168		6,155		469,203		8,421
Investment securities held-to-maturity:
GSE debentures	26,594		281		14,208		530		40,802		811
GSEs MBSs	1,996		15		11,674		203		13,670		218
Municipal obligations	30,542		235		7,408		102		37,950		337
Foreign government obligations	—		—		500		—		500		—
Temporarily impaired investment securities held-to-maturity	59,132		531		33,790		835		92,922		1,366
Total temporarily impaired investment securities	$	313,167	$	2,797	$	248,958	$	6,990	$	562,125	$	9,787

Schedule of maturities of the investments in debt securities

The final stated maturities of the debt securities are as follows for the periods indicated:

	At March 31, 2018						At December 31, 2017
	Amortized Cost		Estimated Fair Value		Weighted Average Rate		Amortized Cost		Estimated Fair Value		Weighted Average Rate
	(Dollars in Thousands)
Investment securities available-for-sale:
Within 1 year	$	25,290	$	25,250	2.23	%	$	23,612	$	23,652	2.27	%
After 1 year through 5 years	162,284		159,464		2.13	%	142,772		142,029		2.05	%
After 5 years through 10 years	146,756		142,749		2.15	%	136,746		134,978		2.06	%
Over 10 years	238,222		229,925		2.15	%	243,856		238,483		2.06	%
	$	572,552	$	557,388	2.15	%	$	546,986	$	539,142	2.07	%
Investment securities held-to-maturity:
Within 1 year	$	1,470	$	1,463	1.00	%	$	918	$	916	0.78	%
After 1 year through 5 years	60,727		59,838		1.80	%	58,335		57,939		1.74	%
After 5 years through 10 years	41,863		40,556		1.98	%	36,589		35,998		1.79	%
Over 10 years	13,292		12,953		2.23	%	13,888		13,670		1.98	%
	$	117,352	$	114,810	1.90	%	$	109,730	$	108,523	1.78	%

Summary of Gains and Losses from Sale of Securities

The table below includes the activity with respect to the sale of the CBU shares.

On March 6, 2018, the Company, through its wholly owned subsidiary, BSC, received $0.6 million in cash and 11,303 shares of CBU common stock as settlement for the indemnification escrow on the 12 month anniversary date of the merger between NRS and CBU. The Company subsequently sold all 11,303 shares of theCBU stock and recognized again on the sale of $0.6 million.

During the month of March, 2018, the Company, through Brookline Bank’s wholly owned subsidiary, LSC, sold two trust preferred securities with a book value of $1.5 million for a loss of $0.1 million. The table below includes the activity with respect to the sale of the trust preferred securities.

Sales of investment and restricted equity securities are summarized as follows:

	Three Months Ended March 31, 2018			Three Months Ended March 31, 2017
	(In Thousands)
Sales of marketable and restricted equity securities	$	2,700		$	11,393
Gross gains from sales	1,230			11,612
Gross losses from sales	(68		)	(219		)
Gain on sales of securities, net	$	1,162		$	11,393

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Loans and Leases (Tables)

3 Months Ended

Mar. 31, 2018

Receivables [Abstract]

Summary of loan and lease balances for the originated and acquired portfolios

The following tables present loan and lease balances and weighted average coupon rates for the originated and acquired loan and lease portfolios at the dates indicated:

	At March 31, 2018
	Originated				Acquired				Total
	Balance		Weighted Average Coupon		Balance		Weighted Average Coupon		Balance		Weighted Average Coupon
	(Dollars In Thousands)
Commercial real estate loans:
Commercial real estate	$	2,129,110	4.28	%	$	148,918	4.44	%	$	2,278,028	4.29	%
Multi-family mortgage	740,603		4.21	%	52,987		4.56	%	793,590		4.23	%
Construction	136,784		4.80	%	31,856		—	%	168,640		3.89	%
Total commercial real estate loans	3,006,497		4.29	%	233,761		3.86	%	3,240,258		4.26	%
Commercial loans and leases:
Commercial	726,852		4.49	%	35,070		5.89	%	761,922		4.55	%
Equipment financing	888,494		7.35	%	3,847		5.94	%	892,341		7.34	%
Condominium association	52,739		4.52	%	—		—	%	52,739		4.52	%
Total commercial loans and leases	1,668,085		6.01	%	38,917		5.89	%	1,707,002		6.01	%
Consumer loans:
Residential mortgage	613,370		3.90	%	159,633		4.38	%	773,003		4.00	%
Home equity	315,085		4.42	%	49,785		4.75	%	364,870		4.47	%
Other consumer	29,187		4.92	%	141		18.00	%	29,328		4.98	%
Total consumer loans	957,642		4.10	%	209,559		4.48	%	1,167,201		4.17	%
Total loans and leases	$	5,632,224	4.77	%	$	482,237	4.29	%	$	6,114,461	4.73	%

	At December 31, 2017
	Originated				Acquired				Total
	Balance		Weighted Average Coupon		Balance		Weighted Average Coupon		Balance		Weighted Average Coupon
	(Dollars In Thousands)
Commercial real estate loans:
Commercial real estate	$	2,069,392	4.17	%	$	105,577	4.37	%	$	2,174,969	4.18	%
Multi-family mortgage	735,921		4.09	%	24,749		4.48	%	760,670		4.10	%
Construction	140,138		4.58	%	—		—	%	140,138		4.58	%
Total commercial real estate loans	2,945,451		4.17	%	130,326		4.39	%	3,075,777		4.18	%
Commercial loans and leases:
Commercial	696,825		4.35	%	8,179		5.77	%	705,004		4.37	%
Equipment financing	861,974		7.28	%	4,514		5.92	%	866,488		7.27	%
Condominium association	52,619		4.49	%	—		—	%	52,619		4.49	%
Total commercial loans and leases	1,611,418		5.92	%	12,693		5.82	%	1,624,111		5.92	%
Consumer loans:
Residential mortgage	604,897		3.81	%	55,168		4.28	%	660,065		3.85	%
Home equity	314,189		4.16	%	41,765		4.62	%	355,954		4.21	%
Other consumer	14,667		5.51	%	105		18.00	%	14,772		5.60	%
Total consumer loans	933,753		3.95	%	97,038		4.44	%	1,030,791		4.00	%
Total loans and leases	$	5,490,622	4.65	%	$	240,057	4.49	%	$	5,730,679	4.64	%

Schedule of activity in the accretable yield for acquired loan portfolio

The following table summarizes activity in the accretable yield for the acquired loan portfolio for the periods indicated:

	Three Months Ended March 31,
	2018			2017
	(In Thousands)
Balance at beginning of period	$	10,522		$	14,353
Accretion	(1,185		)	(1,407		)
Reclassification from (to) nonaccretable difference as a result of changes in expected cash flows	316			126
Balance at end of period	$	9,653		$	13,072

XML

Allowance for Loan and Lease Losses (Tables)

3 Months Ended

Mar. 31, 2018

Receivables [Abstract]

Schedule of changes in the allowance for loan and lease losses

The following tables present the changes in the allowance for loan and lease losses and the recorded investment in loans and leases by portfolio segment for the periods indicated:

	Three Months Ended March 31, 2018
	Commercial Real Estate			Commercial			Consumer			Total
	(In Thousands)
Balance at December 31, 2017	$	27,112		$	26,333		$	5,147		$	58,592
Charge-offs	(3		)	(733		)	(56		)	(792		)
Recoveries	—			201			86			287
Provision (credit) for loan and lease losses	252			451			(76		)	627
Balance at March 31, 2018	$	27,361		$	26,252		$	5,101		$	58,714

	Three Months Ended March 31, 2017
	Commercial Real Estate			Commercial			Consumer			Total
	(In Thousands)
Balance at December 31, 2016	$	27,645		$	20,906		$	5,115		$	53,666
Charge-offs	(24		)	(1,207		)	(151		)	(1,382		)
Recoveries	140			142			105			387
Provision (credit) for loan and lease losses	227			13,442			(207		)	13,462
Balance at March 31, 2017	$	27,988		$	33,283		$	4,862		$	66,133

Provisions for credit losses

The provisions for credit losses are set forth below for the periods indicated:

	Three Months Ended March 31,
	2018			2017
	(In Thousands)
Provision (credit) for loan and lease losses:
Commercial real estate	$	252		$	227
Commercial	451			13,442
Consumer	(76		)	(207		)
Total provision for loan and lease losses	627			13,462
Unfunded credit commitments	14			(60		)
Total provision for credit losses	$	641		$	13,402

Summary of the recorded investments by credit quality indicator, by loan class

Credit Quality Information

The following tables present the recorded investment in loans in each class as of March 31, 2018, by credit quality indicator.

	At March 31, 2018
	Commercial Real Estate		Multi- Family Mortgage		Construction		Commercial		Equipment Financing		Condominium Association		Other Consumer		Total
	(In Thousands)
Originated:
Loan rating:
Pass	$	2,118,831	$	740,015	$	135,924	$	692,888	$	878,539	$	52,739	$	29,134	$	4,648,070
OAEM	5,684		—		—		13,762		1,833		—		—		21,279
Substandard	4,394		588		860		19,271		5,357		—		53		30,523
Doubtful	201		—		—		931		2,765		—		—		3,897
Total originated	2,129,110		740,603		136,784		726,852		888,494		52,739		29,187		4,703,769
Acquired:
Loan rating:
Pass	136,685		52,706		31,856		33,452		3,836		—		140		258,675
OAEM	1,930		—		—		275		—		—		1		2,206
Substandard	10,303		281		—		1,343		11		—		—		11,938
Doubtful	—		—		—		—		—		—		—		—
Total acquired	148,918		52,987		31,856		35,070		3,847		—		141		272,819
Total loans	$	2,278,028	$	793,590	$	168,640	$	761,922	$	892,341	$	52,739	$	29,328	$	4,976,588

As of March 31, 2018, there were no loans categorized as definite loss.

	At March 31, 2018
	Residential Mortgage				Home Equity
	(Dollars In Thousands)
Originated:
Loan-to-value ratio:
Less than 50%	$	155,121	20.1	%	$	144,513	39.6	%
50% - 69%	270,273		35.0	%	75,826		20.8	%
70% - 79%	166,304		21.5	%	66,491		18.2	%
80% and over	19,988		2.6	%	28,212		7.7	%
Data not available*	1,684		0.2	%	43		—	%
Total originated	613,370		79.4	%	315,085		86.3	%
Acquired:
Loan-to-value ratio:
Less than 50%	32,140		4.0	%	29,519		8.3	%
50%—69%	45,905		5.9	%	13,150		3.5	%
70%—79%	40,067		5.2	%	985		0.3	%
80% and over	29,930		3.9	%	886		0.2	%
Data not available*	11,591		1.6	%	5,245		1.4	%
Total acquired	159,633		20.6	%	49,785		13.7	%
Total loans	$	773,003	100.0	%	$	364,870	100.0	%

_______________________________________________________________________________

* Represents in process general ledger accounts for which data are not available.

The following tables present the recorded investment in loans in each class as of December 31, 2017, by credit quality indicator.

	At December 31, 2017
	Commercial Real Estate		Multi- Family Mortgage		Construction		Commercial		Equipment Financing		Condominium Association		Other Consumer		Total
	(In Thousands)
Originated:
Loan rating:
Pass	$	2,054,376	$	735,313	$	139,278	$	670,265	$	850,006	$	52,619	$	14,628	$	4,516,485
OAEM	8,889		—		—		7,691		3,630		—		—		20,210
Substandard	5,926		608		860		17,681		5,012		—		39		30,126
Doubtful	201		—		—		1,188		3,326		—		—		4,715
Total originated	2,069,392		735,921		140,138		696,825		861,974		52,619		14,667		4,571,536
Acquired:
Loan rating:
Pass	94,244		24,459		—		6,643		4,501		—		104		129,951
OAEM	9,839		—		—		265		—		—		1		10,105
Substandard	1,494		290		—		1,271		13		—		—		3,068
Doubtful	—		—		—		—		—		—		—		—
Total acquired	105,577		24,749		—		8,179		4,514		—		105		143,124
Total loans	$	2,174,969	$	760,670	$	140,138	$	705,004	$	866,488	$	52,619	$	14,772	$	4,714,660

As of December 31, 2017, there were no loans categorized as definite loss.

	At December 31, 2017
	Residential Mortgage				Home Equity
	(Dollars In Thousands)
Originated:
Loan-to-value ratio:
Less than 50%	$	153,373	23.2	%	$	148,137	41.6	%
50%—69%	265,328		40.2	%	75,099		21.1	%
70%—79%	168,272		25.5	%	63,742		17.9	%
80% and over	16,547		2.5	%	27,122		7.6	%
Data not available*	1,377		0.2	%	89		—	%
Total originated	604,897		91.6	%	314,189		88.2	%
Acquired:
Loan-to-value ratio:
Less than 50%	16,521		2.5	%	25,312		7.1	%
50%—69%	19,182		2.9	%	13,883		3.9	%
70%—79%	10,507		1.6	%	943		0.3	%
80% and over	7,893		1.2	%	582		0.2	%
Data not available*	1,065		0.2	%	1,045		0.3	%
Total acquired	55,168		8.4	%	41,765		11.8	%
Total loans	$	660,065	100.0	%	$	355,954	100.0	%

_______________________________________________________________________________

* Represents in process general ledger accounts for which data are not available.

Information regarding troubled debt restructuring loans

The following table presents information regarding foreclosed residential real estate property for the periods indicated:

	At March 31, 2018	At December 31, 2017
	(In Thousands)
Recorded investment in mortgage loans collateralized by residential real estate property that are in the process of foreclosure	—	633

The following table sets forth information regarding TDR loans and leases at the dates indicated:

	At March 31, 2018		At December 31, 2017
	(In Thousands)
Troubled debt restructurings:
On accrual	$	14,294	$	16,241
On nonaccrual	8,610		9,770
Total troubled debt restructurings	$	22,904	$	26,011

Information regarding the aging of past due loans, by loan class

The following tables present an age analysis of the recorded investment in total loans and leases as of March 31, 2018 and December 31, 2017.

	At March 31, 2018
	Past Due												Loans and Leases Past Due Greater Than 90 Days and Accruing
	31-60 Days		61-90 Days		Greater Than 90 Days		Total		Current		Total Loans and Leases				Nonaccrual Loans and Leases
	(In Thousands)
Originated:
Commercial real estate loans:
Commercial real estate	$	8,466	$	633	$	2,645	$	11,744	$	2,117,366	$	2,129,110	$	—	$	3,954
Multi-family mortgage	1,032		—		—		1,032		739,571		740,603		—		588
Construction	297		—		860		1,157		135,627		136,784		—		860
Total commercial real estate loans	9,795		633		3,505		13,933		2,992,564		3,006,497		—		5,402
Commercial loans and leases:
Commercial	1,453		1,642		6,133		9,228		717,624		726,852		—		9,927
Equipment financing	4,207		778		4,241		9,226		879,268		888,494		—		6,661
Condominium association	855		161		—		1,016		51,723		52,739		—		—
Total commercial loans and leases	6,515		2,581		10,374		19,470		1,648,615		1,668,085		—		16,588
Consumer loans:
Residential mortgage	1,553		—		580		2,133		611,237		613,370		—		1,962
Home equity	285		1		51		337		314,748		315,085		1		130
Other consumer	113		13		34		160		29,027		29,187		—		53
Total consumer loans	1,951		14		665		2,630		955,012		957,642		1		2,145
Total originated loans and leases	$	18,261	$	3,228	$	14,544	$	36,033	$	5,596,191	$	5,632,224	$	1	$	24,135

	At March 31, 2018
	Past Due												Loans and Leases Past Due Greater Than 90 Days and Accruing
	31-60 Days		61-90 Days		Greater Than 90 Days		Total		Current		Total Loans and Leases				Nonaccrual Loans and Leases
	(In Thousands)
Acquired:
Commercial real estate loans:
Commercial real estate	$	8,680	$	55	$	1,604	$	10,339	$	138,579	$	148,918	$	1,534	$	126
Multi-family mortgage	—		—		—		—		52,987		52,987		—		—
Construction	—		—		—		—		31,856		31,856		—		—
Total commercial real estate loans	8,680		55		1,604		10,339		223,422		233,761		1,534		126
Commercial loans and leases:
Commercial	93		38		836		967		34,103		35,070		1		1,223
Equipment financing	—		—		11		11		3,836		3,847		5		—
Total commercial loans and leases	93		38		847		978		37,939		38,917		6		1,223
Consumer loans:
Residential mortgage	431		767		2,201		3,399		156,234		159,633		2,201		—
Home equity	260		88		265		613		49,172		49,785		140		795
Other consumer	—		—		—		—		141		141		—		—
Total consumer loans	691		855		2,466		4,012		205,547		209,559		2,341		795
Total acquired loans and leases	$	9,464	$	948	$	4,917	$	15,329	$	466,908	$	482,237	$	3,881	$	2,144
Total loans and leases	$	27,725	$	4,176	$	19,461	$	51,362	$	6,063,099	$	6,114,461	$	3,882	$	26,279

	At December 31, 2017
	Past Due												Loans and Leases Past Due Greater Than 90 Days and Accruing
	31-60 Days		61-90 Days		Greater Than 90 Days		Total		Current		Total Loans and Leases				Nonaccrual Loans and Leases
	(In Thousands)
Originated:
Commercial real estate loans:
Commercial real estate	$	3,294	$	391	$	1,843	$	5,528	$	2,063,864	$	2,069,392	$	—	$	3,182
Multi-family mortgage	6,141		2,590		—		8,731		727,190		735,921		—		608
Construction	6,537		330		860		7,727		132,411		140,138		—		860
Total commercial real estate loans	15,972		3,311		2,703		21,986		2,923,465		2,945,451		—		4,650
Commercial loans and leases:
Commercial	1,344		597		7,724		9,665		687,160		696,825		—		10,365
Equipment financing	3,214		2,494		3,203		8,911		853,063		861,974		224		8,106
Condominium association	857		262		—		1,119		51,500		52,619		—		—
Total commercial loans and leases	5,415		3,353		10,927		19,695		1,591,723		1,611,418		224		18,471
Consumer loans:
Residential mortgage	1,256		166		728		2,150		602,747		604,897		—		1,979
Home equity	643		19		32		694		313,495		314,189		1		132
Other consumer	238		20		28		286		14,381		14,667		—		43
Total consumer loans	2,137		205		788		3,130		930,623		933,753		1		2,154
Total originated loans and leases	$	23,524	$	6,869	$	14,418	$	44,811	$	5,445,811	$	5,490,622	$	225	$	25,275

	At December 31, 2017
	Past Due												Loans and Leases Past Due Greater Than 90 Days and Accruing
	31-60 Days		61-90 Days		Greater Than 90 Days		Total		Current		Total Loans and Leases				Nonaccrual Loans and Leases
	(In Thousands)
Acquired:
Commercial real estate loans:
Commercial real estate	$	1,008	$	—	$	656	$	1,664	$	103,913	$	105,577	$	586	$	131
Multi-family mortgage	—		—		3		3		24,746		24,749		3		—
Construction	—		—		—		—		—		—		—		—
Total commercial real estate loans	1,008		—		659		1,667		128,659		130,326		589		131
Commercial loans and leases:
Commercial	—		44		1,022		1,066		7,113		8,179		17		1,254
Equipment financing	—		—		13		13		4,501		4,514		13		—
Total commercial loans and leases	—		44		1,035		1,079		11,614		12,693		30		1,254
Consumer loans:
Residential mortgage	—		463		1,990		2,453		52,715		55,168		1,990		—
Home equity	508		—		186		694		41,071		41,765		186		612
Other consumer	—		—		—		—		105		105		—		—
Total consumer loans	508		463		2,176		3,147		93,891		97,038		2,176		612
Total acquired loans and leases	$	1,516	$	507	$	3,870	$	5,893	$	234,164	$	240,057	$	2,795	$	1,997
Total loans and leases	$	25,040	$	7,376	$	18,288	$	50,704	$	5,679,975	$	5,730,679	$	3,020	$	27,272

Impaired loans and leases, by loan and leases class

The following tables include the recorded investment and unpaid principal balances of impaired loans and leases with the related allowance amount, if applicable, for the originated and acquired loan and lease portfolios at the dates indicated. Also presented are the average recorded investments in the impaired loans and leases and the related amount of interest recognized during the period that the impaired loans were impaired.

	At March 31, 2018						At December 31, 2017
	Recorded Investment (1)		Unpaid Principal Balance		Related Allowance		Recorded Investment (2)		Unpaid Principal Balance		Related Allowance
	(In Thousands)
Originated:
With no related allowance recorded:
Commercial real estate	$	7,962	$	7,946	$	—	$	9,978	$	9,962	$	—
Commercial	27,032		27,027		—		24,906		25,040		—
Consumer	3,338		3,330		—		3,508		3,500		—
Total originated with no related allowance recorded	38,332		38,303		—		38,392		38,502		—
With an allowance recorded:
Commercial real estate	—		—		—		3,056		3,056		—
Commercial	7,953		7,942		2,509		8,912		8,862		3,105
Consumer	134		134		18		—		—		—
Total originated with an allowance recorded	8,087		8,076		2,527		11,968		11,918		3,105
Total originated impaired loans and leases	46,419		46,379		2,527		50,360		50,420		3,105
Acquired:
With no related allowance recorded:
Commercial real estate	10,676		10,676		—		1,880		1,880		—
Commercial	1,607		1,607		—		1,594		1,594		—
Consumer	4,839		4,839		—		4,736		4,736		—
Total acquired with no related allowance recorded	17,122		17,122		—		8,210		8,210		—
With an allowance recorded:
Consumer	114		114		22		115		115		22
Total acquired with an allowance recorded	114		114		22		115		115		22
Total acquired impaired loans and leases	17,236		17,236		22		8,325		8,325		22
Total impaired loans and leases	$	63,655	$	63,615	$	2,549	$	58,685	$	58,745	$	3,127

___________________________________________________________________________

(1) Includes originated and acquired nonaccrual loans of $23.8 million and $2.1 million, respectively as of March 31, 2018.

(2) Includes originated and acquired nonaccrual loans of $24.9 million and $2.0 million, respectively as of December 31, 2017.

	Three Months Ended
	March 31, 2018				March 31, 2017
	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
	(In Thousands)
Originated:
With no related allowance recorded:
Commercial real estate	$	7,985	$	30	$	9,363	$	32
Commercial	27,761		272		21,058		164
Consumer	3,353		13		5,306		16
Total originated with no related allowance recorded	39,099		315		35,727		212
With an allowance recorded:
Commercial real estate	—		—		4,000		48
Commercial	7,993		16		22,322		1
Consumer	134		1		—		—
Total originated with an allowance recorded	8,127		17		26,322		49
Total originated impaired loans and leases	47,226		332		62,049		261
Acquired:
With no related allowance recorded:
Commercial real estate	10,681		1		9,419		19
Commercial	1,624		4		2,934		10
Consumer	4,860		15		6,133		16
Total acquired with no related allowance recorded	17,165		20		18,486		45
With an allowance recorded:
Commercial real estate	—		—		—		—
Commercial	—		—		—		—
Consumer	114		1		168		1
Total acquired with an allowance recorded	114		1		168		1
Total acquired impaired loans and leases	17,279		21		18,654		46
Total impaired loans and leases	$	64,505	$	353	$	80,703	$	307

Schedule of the impaired and non-impaired loans and leases, by loan and leases class

The following tables present information regarding impaired and non-impaired loans and leases at the dates indicated:

	At March 31, 2018
	Commercial Real Estate		Commercial		Consumer		Total
	(In Thousands)
Allowance for Loan and Lease Losses:
Originated:
Individually evaluated for impairment	$	—	$	2,509	$	18	$	2,527
Collectively evaluated for impairment	26,674		23,613		4,990		55,277
Total originated loans and leases	26,674		26,122		5,008		57,804
Acquired:
Individually evaluated for impairment	—		—		22		22
Collectively evaluated for impairment	104		12		15		131
Acquired with deteriorated credit quality	583		118		56		757
Total acquired loans and leases	687		130		93		910
Total allowance for loan and lease losses	$	27,361	$	26,252	$	5,101	$	58,714
Loans and Leases:
Originated:
Individually evaluated for impairment	$	7,959	$	30,561	$	3,406	$	41,926
Collectively evaluated for impairment	2,998,538		1,637,524		954,236		5,590,298
Total originated loans and leases	3,006,497		1,668,085		957,642		5,632,224
Acquired:
Individually evaluated for impairment	—		1,447		1,964		3,411
Collectively evaluated for impairment	139,761		33,145		169,453		342,359
Acquired with deteriorated credit quality	94,000		4,325		38,142		136,467
Total acquired loans and leases	233,761		38,917		209,559		482,237
Total loans and leases	$	3,240,258	$	1,707,002	$	1,167,201	$	6,114,461

	At December 31, 2017
	Commercial Real Estate		Commercial		Consumer		Total
	(In Thousands)
Allowance for Loan and Lease Losses:
Originated:
Individually evaluated for impairment	$	—	$	3,105	$	—	$	3,105
Collectively evaluated for impairment	26,366		23,078		5,003		54,447
Total originated loans and leases	26,366		26,183		5,003		57,552
Acquired:
Individually evaluated for impairment	—		—		22		22
Collectively evaluated for impairment	145		13		17		175
Acquired with deteriorated credit quality	601		137		105		843
Total acquired loans and leases	746		150		144		1,040
Total allowance for loan and lease losses	$	27,112	$	26,333	$	5,147	$	58,592
Loans and Leases:
Originated:
Individually evaluated for impairment	$	13,031	$	29,386	$	3,070	$	45,487
Collectively evaluated for impairment	2,932,420		1,582,032		930,683		5,445,135
Total originated loans and leases	2,945,451		1,611,418		933,753		5,490,622
Acquired:
Individually evaluated for impairment	—		1,487		1,867		3,354
Collectively evaluated for impairment	34,244		6,399		55,921		96,564
Acquired with deteriorated credit quality	96,082		4,807		39,250		140,139
Total acquired loans and leases	130,326		12,693		97,038		240,057
Total loans and leases	$	3,075,777	$	1,624,111	$	1,030,791	$	5,730,679

Summary of loans restructured or defaulted

The recorded investment in TDR loans and the associated specific allowances for loan and lease losses, in the originated and acquired loan and lease portfolios, that were modified during the periods indicated, are as follows.

	At and for the Three Months Ended March 31, 2018
		Recorded Investment				Specific Allowance for Loan and Lease Losses						Defaulted (1)
	Number of Loans/ Leases	At Modification		At End of Period				Nonaccrual Loans and Leases		Additional Commitment		Number of Loans/ Leases	Recorded Investment
	(Dollars in Thousands)
Originated:
Commercial	6	$	635	$	635	$	41	$	635	$	—	1	$	929
Equipment financing	6	1,555		1,555		—		—		—		—	—
Total originated	12	$	2,190	$	2,190	$	41	$	635	$	—	1	$	929

______________________________________________________________________

(1) Includes loans and leases that have been modified within the past twelve months and subsequently had payment defaults during the period indicated.

There were no acquired loans and leases that met the definition of a TDR during the three months ended March 31, 2018.

	At and for the Three Months Ended March 31, 2017
		Recorded Investment				Specific Allowance for Loan and Lease Losses						Defaulted (1)
	Number of Loans/ Leases	At Modification		At End of Period				Nonaccrual Loans and Leases		Additional Commitment		Number of Loans/ Leases	Recorded Investment
	(Dollars in Thousands)
Originated:
Commercial	3	$	765	$	765	$	364	$	741	$	—	3	$	800
Total originated	3	$	765	$	765	$	364	$	741	—		3	$	800

______________________________________________________________________

(1) Includes loans and leases that have been modified within the past twelve months and subsequently had payment defaults during the period indicated.

There were no acquired loans and leases that met the definition of a TDR during the three months ended March 31, 2017.

Schedule of troubled debt restructurings by type of modification

The following table sets forth the Company's end-of-period balances for TDRs that were modified during the periods indicated, by type of modification.

	Three Months Ended March 31,
	2018		2017
	(In Thousands)
Loans with one modification:
Adjusted principal	$	—	$	375
Combination maturity, principal, interest rate	2,190		390
Total loans with one modification	$	2,190	$	765

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Goodwill and Other Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of changes in the carrying value of goodwill

The following table sets forth the carrying value of goodwill and other intangible assets at the dates indicated:

	At March 31, 2018		At December 31, 2017
	(In Thousands)
Goodwill	$	137,890	$	137,890
Additions	23,006		—
Balance at end of period	160,896		137,890
Other intangible assets:
Core deposits	6,608		4,955
Trade name	1,089		1,089
Total other intangible assets	7,697		6,044
Total goodwill and other intangible assets	$	168,593	$	143,934

Schedule of composition of other intangible assets

The following table sets forth the carrying value of goodwill and other intangible assets at the dates indicated:

	At March 31, 2018		At December 31, 2017
	(In Thousands)
Goodwill	$	137,890	$	137,890
Additions	23,006		—
Balance at end of period	160,896		137,890
Other intangible assets:
Core deposits	6,608		4,955
Trade name	1,089		1,089
Total other intangible assets	7,697		6,044
Total goodwill and other intangible assets	$	168,593	$	143,934

Schedule of estimated aggregate future amortization expense for intangible assets

The estimated aggregate future amortization expense (in thousands) for other intangible assets for each of the next five years and thereafter is as follows:

Remainder of 2018	$	1,691
Year ending:
2019	1,682
2020	1,247
2021	839
2022	486
2023	256
Thereafter	407
Total	$	6,608

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Accumulated Other Comprehensive Income (Loss) (Tables)

3 Months Ended

Mar. 31, 2018

Equity [Abstract]

Schedule of changes in accumulated other comprehensive (loss) income by component, net of tax

Changes in accumulated other comprehensive income (loss) by component, net of tax, were as follows for the periods indicated:

	Three Months Ended March 31, 2018
	Investment Securities Available-for-Sale			Postretirement Benefits		Accumulated Other Comprehensive Loss
	(In Thousands)
Balance at December 31, 2017	$	(6,113	)	$	163	$	(5,950	)
Other comprehensive income	(5,716		)	—		(5,716		)
Balance at March 31, 2018	$	(11,829	)	$	163	$	(11,666	)

	Three Months Ended March 31, 2017
	Investment Securities Available-for-Sale			Postretirement Benefits		Accumulated Other Comprehensive Loss
	(In Thousands)
Balance at December 31, 2016	$	(4,213	)	$	395	$	(3,818	)
Other comprehensive income	557			—		557
Balance at March 31, 2017	$	(3,656	)	$	395	$	(3,261	)

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Derivatives and Hedging Activities (Tables)

3 Months Ended

Mar. 31, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of fair value and classification of derivative financial instruments on the consolidated balance sheets and the effect of the derivative financial instruments on the consolidated income statements

The following tables presents the Company's customer related derivative positions for the periods indicated below for those derivatives not designated as hedging.

	Notional Amount Maturing
	Number of Positions	Less than 1 year		Less than 2 years		Less than 3 years		Less than 4 years		Thereafter		Total		Fair Value
	March 31, 2018
	(Dollars In Thousands)
Loan level derivatives
Receive fixed, pay variable	66	$	3,872	$	2,010	$	27,607	$	—	$	504,205	$	537,694	$	13,594
Pay fixed, receive variable	66	3,872		2,010		27,607		—		504,205		537,694		13,594
Risk participation-out agreements	8	—		—		8,495		—		28,667		37,162		43
Risk participation-in agreements	1	—		—		—		—		3,825		3,825		7
Foreign exchange contracts
Buys foreign currency, sells U.S. currency	18	$	1,330	$	—	$	—	$	—	$	—	$	1,330	$	65
Sells foreign currency, buys U.S. currency	36	1,335		—		—		—		—		1,335		60

	Notional Amount Maturing
	Number of Positions	Less than 1 year		Less than 2 years		Less than 3 years		Less than 4 years		Thereafter		Total		Fair Value
	December 31, 2017
	(Dollars In Thousands)
Loan level derivatives
Receive fixed, pay variable	66	$	3,903	$	2,036	$	27,992	$	—	$	460,728	$	494,659	$	8,865
Pay fixed, receive variable	66	3,903		2,036		27,992		—		460,728		494,659		8,865
Risk participation-out agreements	8	—		—		8,613		—		28,014		36,627		65
Risk participation-in agreements	1	—		—		—		—		3,825		3,825		10
Foreign exchange contracts
Buys foreign currency, sells U.S. currency	22	$	1,495	$	—	$	—	$	—	$	—	$	1,495	$	65
Sells foreign currency, buys U.S. currency	44	1,502		—		—		—		—		1,502		72

Schedule of offsetting derivatives and amounts subject to master netting agreements not offset in the audited consolidated balance sheet

The tables below present the offsetting of derivatives and amounts subject to master netting agreements not offset in the unaudited consolidated balance sheet at the dates indicated.

	At March 31, 2018
	Gross Amounts Recognized		Gross Amounts Offset in the Statement of Financial Position		Net Amounts  Presented in the Statement of Financial Position		Gross Amounts Not Offset in the Statement of Financial Position				Net Amount
							Financial Instruments Pledged		Cash Collateral Pledged
	(In Thousands)
Asset derivatives
Loan level derivatives	$	13,594	$	—	$	13,594	$	—	$	530	$	13,064
Risk participation-out agreements	43		—		43		—		—		43
Foreign exchange contracts	65		—		65		—		—		65
Total	$	13,702	$	—	$	13,702	$	—	$	530	$	13,172
Liability derivatives
Loan level derivatives	$	13,594	$	—	$	13,594	$	24,017	$	1,510	$	—
Risk participation-in agreements	7		—		7		—		—		7
Foreign exchange contracts	60		—		60		—		—		60
Total	$	13,661	$	—	$	13,661	$	24,017	$	1,510	$	67

	At December 31, 2017
	Gross Amounts Recognized		Gross Amounts Offset in the Statement of Financial Position		Net Amounts  Presented in the Statement of Financial Position		Gross Amounts Not Offset in the Statement of Financial Position				Net Amount
							Financial Instruments Pledged		Cash Collateral Pledged
	(In Thousands)
Asset derivatives
Loan level derivatives	$	8,865	$	—	$	8,865	$	—	$	—	$	8,865
Risk participation-out agreements	65		—		65		—		—		65
Foreign exchange contracts	72		—		72		—		—		72
Total	$	9,002	$	—	$	9,002	$	—	$	—	$	9,002
Liability derivatives
Loan level derivatives	$	8,865	$	—	$	8,865	$	25,159	$	1,510	$	—
Risk participation-in agreements	10		—		10		—		—		—
Foreign exchange contracts	65		—		65		—		—		—
Total	$	8,940	$	—	$	8,940	$	25,159	$	1,510	$	—

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Earnings per Share (EPS) (Tables)

3 Months Ended

Mar. 31, 2018

Earnings Per Share [Abstract]

Reconciliation of basic EPS and diluted EPS

The following table is a reconciliation of basic EPS and diluted EPS:

	Three Months Ended
	March 31, 2018				March 31, 2017
	Basic		Fully Diluted		Basic		Fully Diluted
	(Dollars in Thousands, Except Per Share Amounts)
Numerator:
Net income	$	18,633	$	18,633	$	13,445	$	13,445
Denominator:
Weighted average shares outstanding	77,879,593		77,879,593		70,386,766		70,386,766
Effect of dilutive securities	—		288,207		—		457,330
Adjusted weighted average shares outstanding	77,879,593		78,167,800		70,386,766		70,844,096
EPS	$	0.24	$	0.24	$	0.19	$	0.19

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Fair Value of Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2018

Fair value of assets and liabilities

Schedule of quantitative information about significant unobservable inputs (Level 3) for assets measured at fair value on a recurring basis

The table below presents quantitative information about significant unobservable inputs (Level 3) for assets measured at fair value on a recurring basis at the dates indicated.

	Fair Value				Valuation Technique
	At March 31, 2018		At December 31, 2017
	(Dollars in Thousands)
Collateral-dependent impaired loans and leases	$	17,284	$	21,195	Appraisal of collateral (1)
Other real estate owned	3,235		3,235		Appraisal of collateral (1)

_______________________________________________________________________________

⁽¹⁾ Fair value is generally determined through independent appraisals of the underlying collateral. The Company may also use another available source of collateral assessment to determine a reasonable estimate of the fair value of the collateral. Appraisals may be adjusted by management for qualitative factors such as economic factors and estimated liquidation expenses. The range of the unobservable inputs used may vary but is generally 0% - 10% on the discount for costs to sell and 0% - 15% on appraisal adjustments.

Summary of the carrying values and estimated fair values

The following table presents the carrying amount, estimated fair value, and placement in the fair value hierarchy of the Company's financial instruments at the dates indicated. This table excludes financial instruments for which the carrying amount approximates fair value. Financial assets for which the fair value approximates carrying value include cash and cash equivalents, restricted equity securities, and accrued interest receivable. Financial liabilities for which the fair value approximates carrying value include non-maturity deposits, short-term borrowings, and accrued interest payable.

					Fair Value Measurements
	Carrying Value		Estimated Fair Value		Level 1 Inputs		Level 2 Inputs		Level 3 Inputs
	(In Thousands)
At March 31, 2018
Financial assets:
Investment securities held-to-maturity:
GSE debentures	$	50,529	$	49,175	$	—	$	49,175	$	—
GSE MBSs	13,344		13,004		—		13,004		—
Municipal obligations	52,979		52,134		—		52,134		—
Foreign government obligations	500		497		—		—		497
Loans held-for-sale	756		756		—		756		—
Loans and leases, net	6,055,747		5,947,840		—		—		5,947,840
Restricted equity securities	66,164		66,164		—		—		66,164
Financial liabilities:
Certificates of deposit	1,361,722		1,346,500		—		1,346,500		—
Borrowed funds	1,099,429		1,075,857		—		1,075,857		—

					Fair Value Measurements
	Carrying Value		Estimated Fair Value		Level 1 Inputs		Level 2 Inputs		Level 3 Inputs
	(In Thousands)
At December 31, 2017
Financial assets:
Investment securities held-to-maturity:
GSE debentures	$	41,612	$	40,801	$	—	$	40,801	$	—
GSE MBSs	13,923		13,705		—		13,705		—
Municipal obligations	53,695		53,517		—		53,517		—
Foreign government obligations	500		500		—		—		500
Loans held-for-sale	2,628		2,628		—		2,628		—
Loans and leases, net	5,672,087		5,594,543		—		—		5,594,543
Restricted equity securities	59,369		59,369		—		—		59,369
Financial liabilities:
Certificates of deposit	1,207,470		1,198,201		—		1,198,201		—
Borrowed funds	1,020,819		995,335		—		995,335		—

Recurring basis

Fair value of assets and liabilities

Schedule of assets and liabilities measured at fair value on a recurring and non-recurring basis

The following tables set forth the carrying value of assets and liabilities measured at fair value on a recurring basis at the dates indicated:

	Carrying Value as of March 31, 2018
	Level 1		Level 2		Level 3		Total
	(In Thousands)
Assets:
Investment securities available-for-sale:
GSE debentures	$	—	$	180,968	$	—	$	180,968
GSE CMOs	—		119,697		—		119,697
GSE MBSs	—		192,185		—		192,185
SBA commercial loan asset-backed securities	—		69		—		69
Corporate debt obligations	—		55,872		—		55,872
U.S. Treasury bonds	—		8,597		—		8,597
Trust preferred securities	—		—		—		—
Marketable equity securities	969		—		—		969
Total investment securities available-for-sale	$	969	$	557,388	$	—	$	558,357
Loan level derivatives	$	—	$	13,594	$	—	$	13,594
Risk participation-out agreements	—		43		—		43
Foreign exchange contracts	—		65		—		65
Liabilities:
Loan level derivatives	$	—	$	13,594	$	—	$	13,594
Risk participation-in agreements	—		7		—		7
Foreign exchange contracts	—		60		—		60

	Carrying Value as of December 31, 2017
	Level 1		Level 2		Level 3		Total
	(In Thousands)
Assets:
Investment securities available-for-sale:
GSE debentures	$	—	$	149,924	$	—	$	149,924
GSE CMOs	—		127,022		—		127,022
GSE MBSs	—		189,313		—		189,313
SBA commercial loan asset-backed securities	—		72		—		72
Corporate debt obligations	—		62,683		—		62,683
U.S. Treasury bonds	—		8,730		—		8,730
Trust preferred securities	—		1,398		—		1,398
Marketable equity securities	982		—		—		982
Total investment securities available-for-sale	$	982	$	539,142	$	—	$	540,124
Loan level derivatives	$	—	$	8,865	$	—	$	8,865
Risk participation-out agreements	—		65		—		65
Foreign exchange contracts	—		72		—		72
Liabilities:
Loan level derivatives	$	—	$	8,865	$	—	$	8,865
Risk participation-in agreements	—		10		—		10
Foreign exchange contracts	—		65		—		65

Nonrecurring basis

Fair value of assets and liabilities

Schedule of assets and liabilities measured at fair value on a recurring and non-recurring basis

Assets and liabilities measured at fair value on a non-recurring basis are summarized below at the dated indicated:

	Carrying Value as of March 31, 2018
	Level 1		Level 2		Level 3		Total
	(In Thousands)
Assets measured at fair value on a non-recurring basis:
Collateral-dependent impaired loans and leases	$	—	$	—	$	17,284	$	17,284
OREO	—		—		3,235		3,235
Repossessed assets	—		728		—		728
Total assets measured at fair value on a non-recurring basis	$	—	$	728	$	20,519	$	21,247

	Carrying Value as of December 31, 2017
	Level 1		Level 2		Level 3		Total
	(In Thousands)
Assets measured at fair value on a non-recurring basis:
Collateral-dependent impaired loans and leases	$	—	$	—	$	21,195	$	21,195
OREO	—		—		3,235		3,235
Repossessed assets	—		1,184		—		1,184
Total assets measured at fair value on a non-recurring basis	$	—	$	1,184	$	24,430	$	25,614

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Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Schedule of financial instruments with off-balance sheet risk

Financial instruments with off-balance-sheet risk at the dates indicated follow:

	At March 31, 2018		At December 31, 2017
	(In Thousands)
Financial instruments whose contract amounts represent credit risk:
Commitments to originate loans and leases:
Commercial real estate	$	34,112	$	76,653
Commercial	106,956		83,032
Residential mortgage	24,162		28,745
Unadvanced portion of loans and leases	608,440		571,668
Unused lines of credit:
Home equity	435,594		407,552
Other consumer	29,730		34,191
Other commercial	336		323
Unused letters of credit:
Financial standby letters of credit	9,972		12,422
Performance standby letters of credit	736		736
Commercial and similar letters of credit	184		184
Loan level derivatives (Notional principal amounts):
Receive fixed, pay variable	537,694		494,659
Pay fixed, receive variable	537,694		494,659
Risk participation-out agreements	37,162		36,627
Risk participation-in agreements	3,825		3,825
Foreign exchange contracts (Notional amounts):
Buys foreign currency, sells U.S. currency	1,330		1,495
Sells foreign currency, buys U.S. currency	1,335		1,502

Schedule of future minimum rental payments under noncancellable operating leases

Total lease commitments increased from $29,665 thousand as of December 31, 2017 to $31,004 thousand as of March 31, 2018. The increase is due to the addition of the leases of 2 former First Commons Bank branches and an ATM location, the opening of 2 new C&I lending offices in Braintree and Wakefield and the execution of a lease extension made for Eastern Funding. A summary of future minimum rental payments under such leases at the dates indicated follows:

	Minimum Rental Payments
	(In Thousands)
Remainder of 2018	$	4,323
Year ending:
2019	5,366
2020	4,691
2021	3,635
2022	2,807
2023	2,225
Thereafter	7,957
Total	$	31,004

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Basis of Presentation (Details) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2018 bank	Dec. 31, 2017 USD ($)
Basis of Presentation
Number of full-service banking offices	27
Percentage of insurance offered	100.00%
Eastern Funding LLC
Basis of Presentation
Percentage of ownership in subsidiary	84.10%
BankRI
Basis of Presentation
Number of full-service banking offices	20
First Ipswich
Basis of Presentation
Number of full-service banking offices	6
Retained Earnings
Basis of Presentation
Reclassifications related to TCJA | $		$ 1.1

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Acquisitions (Narrative) (Details) $ in Thousands		3 Months Ended
	Mar. 01, 2018 USD ($) branch shares	Mar. 31, 2018 USD ($)	Mar. 31, 2017 USD ($)
Business Acquisition [Line Items]
Merger and acquisition expense		$ 2,905	$ 0
Amortization of identified intangible assets		467	$ 532
First Commons Bank
Business Acquisition [Line Items]
Number of branches acquired | branch	2
Consideration transferred	$ 56,000
Share exchange ratio	1.089
Stock consideration payment	$ 851
Increase in shares outstanding (in shares) | shares	3,481,477
Federal home loan bank stock	$ 880
Federal reserve bank stock	1,000
Discount from loan accounting valuation	1,600
Total consolidated assets	335,020
Core deposit and other intangibles	2,122
Discount from results of certificate of deposit valuation	1,200
Core deposits | First Commons Bank
Business Acquisition [Line Items]
Amortization of identified intangible assets		41
Core deposit and other intangibles	$ 2,100
Loans | First Commons Bank
Business Acquisition [Line Items]
Accretion recorded		27
Certificates of Deposit | First Commons Bank
Business Acquisition [Line Items]
Accretion recorded		$ 82

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Acquisitions (Purchase Price Allocation) (Details) - First Commons Bank $ in Thousands	Mar. 01, 2018 USD ($)
ASSETS
Cash	$ 42,995
Restricted stock	1,884
Loans	262,095
Premises and equipment	583
Goodwill	23,005
Core deposit and other intangibles	2,122
Other assets	2,336
Total assets acquired	335,020
LIABILITIES
Deposits	273,701
Borrowings	5,000
Other liabilities	287
Total liabilities assumed	278,988
Purchase price	$ 56,032

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Investment Securities (Summary of Available-for-sale and Held-to-maturity Securities)(Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Investment securities available-for-sale
Amortized Cost	$ 573,532	$ 547,964
Gross Unrealized Gains	331	581
Gross Unrealized Losses	15,506	8,421
Estimated Fair Value	558,357	540,124
Investment securities held-to-maturity
Amortized Cost	117,352	109,730
Gross Unrealized Gains	15	159
Gross Unrealized Losses	2,557	1,366
Estimated Fair Value	114,810	108,523
GSE debentures
Investment securities available-for-sale
Amortized Cost	184,760	151,483
Gross Unrealized Gains	71	70
Gross Unrealized Losses	3,863	1,629
Estimated Fair Value	180,968	149,924
Investment securities held-to-maturity
Amortized Cost	50,529	41,612
Gross Unrealized Gains	4	0
Gross Unrealized Losses	1,358	811
Estimated Fair Value	49,175	40,801
GSE CMOs
Investment securities available-for-sale
Amortized Cost	125,061	131,082
Gross Unrealized Gains	18	27
Gross Unrealized Losses	5,382	4,087
Estimated Fair Value	119,697	127,022
GSE MBSs
Investment securities available-for-sale
Amortized Cost	197,083	191,281
Gross Unrealized Gains	231	354
Gross Unrealized Losses	5,129	2,322
Estimated Fair Value	192,185	189,313
Investment securities held-to-maturity
Amortized Cost	13,344	13,923
Gross Unrealized Gains	0	0
Gross Unrealized Losses	340	218
Estimated Fair Value	13,004	13,705
SBA commercial loan asset-backed securities
Investment securities available-for-sale
Amortized Cost	70	73
Gross Unrealized Gains	0	0
Gross Unrealized Losses	1	1
Estimated Fair Value	69	72
Corporate debt obligations
Investment securities available-for-sale
Amortized Cost	56,784	62,811
Gross Unrealized Gains	5	110
Gross Unrealized Losses	917	238
Estimated Fair Value	55,872	62,683
U.S. Treasury bonds
Investment securities available-for-sale
Amortized Cost	8,794	8,785
Gross Unrealized Gains	0	7
Gross Unrealized Losses	197	62
Estimated Fair Value	8,597	8,730
Trust preferred securities
Investment securities available-for-sale
Amortized Cost	0	1,471
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	73
Estimated Fair Value	0	1,398
Marketable equity securities
Investment securities available-for-sale
Amortized Cost	980	978
Gross Unrealized Gains	6	13
Gross Unrealized Losses	17	9
Estimated Fair Value	969	982
Municipal obligations
Investment securities held-to-maturity
Amortized Cost	52,979	53,695
Gross Unrealized Gains	11	159
Gross Unrealized Losses	856	337
Estimated Fair Value	52,134	53,517
Foreign government obligations
Investment securities held-to-maturity
Amortized Cost	500	500
Gross Unrealized Gains	0	0
Gross Unrealized Losses	3	0
Estimated Fair Value	$ 497	$ 500

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Investment Securities (Narrative)(Details)		1 Months Ended	3 Months Ended
	Mar. 06, 2018 USD ($) shares	Mar. 31, 2018 USD ($) security shares	Mar. 31, 2018 USD ($) security	Mar. 31, 2017 USD ($)	Dec. 31, 2017 USD ($) security	Feb. 03, 2017 $ / shares shares
Investment Securities
Investment securities available-for-sale		$ 558,357,000	$ 558,357,000		$ 540,124,000
Loss on sales of securities			1,162,000	$ 11,393,000
Net unrealized loss		15,200,000	15,200,000		7,800,000
Estimated fair value		$ 512,100,000	$ 512,100,000		$ 469,200,000
Percentage of securities in unrealized loss positions, available-for-sale securities		91.70%	91.70%		86.90%
Gross Unrealized Losses		$ 15,506,000	$ 15,506,000		$ 8,421,000
Investment securities held to maturity, fair value		114,810,000	114,810,000		108,523,000
Net unrealized (loss), held-to-maturity securities		2,500,000	2,500,000		1,200,000
Fair value		$ 109,000,000	$ 109,000,000		$ 92,900,000
Percentage of securities in unrealized loss positions, held-to-maturity securities		95.00%	95.00%		85.60%
Gross Unrealized Losses		$ 2,557,000	$ 2,557,000		$ 1,366,000
Investment securities pledged as collateral		463,100,000	463,100,000		431,200,000
Purchases of securities available-for-sale			49,108,000	23,935,000
Purchases of investment securities held-to-maturity			8,915,000	14,873,000
Estimated fair value of debt securities have right to call or prepay the obligations		30,800,000	30,800,000		58,800,000
Estimated fair value of debt securities have right to call or prepay the obligations, scheduled maturities of after one year through five years		17,700,000	17,700,000		32,700,000
Estimated fair value of debt securities have right to call or prepay the obligations, scheduled maturities after five years through ten years		13,100,000	13,100,000		25,200,000
Estimated fair value of debt securities have right to call or prepay the obligations, scheduled maturities of which is after 10 years		0	0		900,000
Proceeds from sales of investment securities available-for-sale			1,470,000	11,515,000
US Government Sponsored Enterprises Debt Securities Excluding Specified Securities
Investment Securities
Investment securities available-for-sale		23,100,000	23,100,000		23,700,000
GSE debentures
Investment Securities
Investment securities available-for-sale		180,968,000	180,968,000		149,924,000
Net unrealized loss		(3,800,000)	(3,800,000)		(1,600,000)
Gross Unrealized Losses		3,863,000	3,863,000		1,629,000
Investment securities held to maturity, fair value		49,175,000	49,175,000		40,801,000
Net unrealized (loss), held-to-maturity securities		(1,400,000)	(1,400,000)		(800,000)
Fair value		49,200,000	49,200,000		40,800,000
Gross Unrealized Losses		$ 1,358,000	$ 1,358,000		$ 811,000
Number of securities | security		60	60		48
Number of securities in unrealized loss positions | security		51	51		43
Purchases of securities available-for-sale			$ 33,900,000	23,900,000
Number of securities | security		17	17		14
Number of securities in an unrealized loss position | security		16	16		14
Purchases of investment securities held-to-maturity			$ 8,900,000	14,900,000
GSE CMOs
Investment Securities
Investment securities available-for-sale		$ 119,700,000	119,700,000		$ 127,000,000
Net unrealized loss		$ (5,400,000)	$ (5,400,000)		$ (4,100,000)
Number of securities | security		62	62		62
Number of securities in unrealized loss positions | security		47	47		47
Purchases of securities available-for-sale			$ 0
GSE mortgage-related securities
Investment Securities
Investment securities available-for-sale		$ 192,200,000	192,200,000		$ 189,300,000
Net unrealized loss		$ (4,900,000)	$ (4,900,000)		$ (2,000,000)
Number of securities | security		195	195		194
Number of securities in unrealized loss positions | security		94	94		82
Purchases of securities available-for-sale			$ 15,200,000	0
SBA commercial loan asset-backed securities
Investment Securities
Investment securities available-for-sale		$ 69,000	69,000		$ 72,000
Gross Unrealized Losses		$ 1,000	$ 1,000		$ 1,000
Number of securities | security		5	5		5
Number of securities in unrealized loss positions | security		4	4		4
Purchases of securities available-for-sale			$ 0	0
Corporate debt obligations
Investment Securities
Investment securities available-for-sale		$ 55,872,000	55,872,000		$ 62,683,000
Net unrealized loss		(900,000)	(900,000)		(100,000)
Gross Unrealized Losses		$ 917,000	$ 917,000		$ 238,000
Number of securities | security		17	17		19
Number of securities in unrealized loss positions | security		14	14		9
Purchases of securities available-for-sale			$ 0	0
U.S. Treasury bonds
Investment Securities
Investment securities available-for-sale		$ 8,597,000	8,597,000		$ 8,730,000
Net unrealized loss		200,000	200,000		(100,000)
Gross Unrealized Losses		$ 197,000	$ 197,000		$ 62,000
Number of securities | security		2	2		2
Purchases of securities available-for-sale			$ 0	0
Trust preferred securities
Investment Securities
Investment securities available-for-sale		$ 0	0		$ 1,398,000
Loss on sales of securities			(100,000)
Net unrealized loss					(100,000)
Gross Unrealized Losses		$ 0	$ 0		$ 73,000
Number of securities | security		2	2		2
Marketable equity securities
Investment Securities
Investment securities available-for-sale		$ 969,000	$ 969,000		$ 982,000
Gross Unrealized Losses		$ 17,000	$ 17,000		$ 9,000
Number of securities | security		2	2		2
Number of securities in unrealized loss positions | security		1	1		1
Purchases of securities available-for-sale			$ 0	0
GSE MBSs
Investment Securities
Investment securities available-for-sale		$ 192,185,000	192,185,000		$ 189,313,000
Gross Unrealized Losses		5,129,000	5,129,000		2,322,000
Investment securities held to maturity, fair value		13,004,000	13,004,000		13,705,000
Net unrealized (loss), held-to-maturity securities		(300,000)	(300,000)		(200,000)
Fair value		13,000,000	13,000,000		13,700,000
Gross Unrealized Losses		$ 340,000	$ 340,000		$ 218,000
Number of securities | security		11	11		11
Number of securities in an unrealized loss position | security		8	8		8.0
Purchases of investment securities held-to-maturity			$ 0	$ 0
Municipal obligations
Investment Securities
Investment securities held to maturity, fair value		$ 52,134,000	52,134,000		$ 53,517,000
Net unrealized (loss), held-to-maturity securities		(800,000)	(800,000)		(200,000)
Fair value		52,100,000	52,100,000		53,500,000
Gross Unrealized Losses		$ 856,000	$ 856,000		$ 337,000
Number of securities | security		100	100		100
Number of securities in an unrealized loss position | security		93	93		69
Purchases of investment securities held-to-maturity			$ 0
Foreign government obligations
Investment Securities
Investment securities held to maturity, fair value		$ 497,000	497,000		$ 500,000
Fair value		500,000	500,000		500,000
Gross Unrealized Losses		$ 3,000	$ 3,000		$ 0
Number of securities | security		1	1		1
Community Bank Systems, Inc. | Brookline Securities Corp
Investment Securities
Cash proceeds from settlement	$ 600,000
Shares received in settlement (in shares) | shares	11,303
Shares sold (in shares) | shares	11,303
Gain (loss) on sale	$ 600,000
Cash received per share at exchange (in dollars per share) | $ / shares						$ 319.00
Number of acquirer shares received per acquiree shares held at exchange (in shares) | shares						14.876
Daily authorized amount of shares that can be sold (in shares) | shares						5,071
Longwood Securities | Brookline Securities Corp
Investment Securities
Shares sold (in shares) | shares		2
Book value		$ 1,500,000	$ 1,500,000
Gain (loss) on sale		(100,000)
Northeast Retirement Services | Brookline Securities Corp
Investment Securities
Number of shares held as investment | shares						9,721
Debt Securities
Investment Securities
Estimated fair value		512,149,000	512,149,000		$ 469,203,000
Fair value		109,014,000	109,014,000		92,922,000
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss		$ 2,557,000	$ 2,557,000		$ 1,366,000

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Investment Securities (Other-Than-Temporary Impairment)(Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Investment securities available-for-sale
Estimated Fair Value	$ 512,100	$ 469,200
Investment securities held-to-maturity
Total, estimated fair value	109,000	92,900
GSE debentures
Investment securities available-for-sale
Less than twelve months, estimated fair value	143,716	120,409
Less than twelve months, unrealized losses	3,284	1,263
Twelve months or longer, estimated fair value	12,256	12,481
Twelve months or longer, unrealized losses	579	366
Estimated Fair Value	155,972	132,890
Total, unrealized losses	3,863	1,629
Investment securities held-to-maturity
Less than twelve months, estimated fair value	32,196	26,594
Less than twelve months, unrealized losses	628	281
Twelve months or longer, estimated fair value	14,007	14,208
Twelve months or longer, unrealized losses	730	530
Total, estimated fair value	46,203	40,802
Total, unrealized losses	1,358	811
GSE CMOs
Investment securities available-for-sale
Less than twelve months, estimated fair value	2,614	2,862
Less than twelve months, unrealized losses	64	34
Twelve months or longer, estimated fair value	116,505	123,548
Twelve months or longer, unrealized losses	5,318	4,053
Estimated Fair Value	119,119	126,410
Total, unrealized losses	5,382	4,087
GSE MBSs
Investment securities available-for-sale
Less than twelve months, estimated fair value	109,406	94,985
Less than twelve months, unrealized losses	2,250	753
Twelve months or longer, estimated fair value	70,625	74,782
Twelve months or longer, unrealized losses	2,879	1,569
Estimated Fair Value	180,031	169,767
Total, unrealized losses	5,129	2,322
Investment securities held-to-maturity
Less than twelve months, estimated fair value	1,872	1,996
Less than twelve months, unrealized losses	34	15
Twelve months or longer, estimated fair value	11,081	11,674
Twelve months or longer, unrealized losses	306	203
Total, estimated fair value	12,953	13,670
Total, unrealized losses	340	218
SBA commercial loan asset-backed securities
Investment securities available-for-sale
Less than twelve months, estimated fair value	32	34
Less than twelve months, unrealized losses	0	0
Twelve months or longer, estimated fair value	31	33
Twelve months or longer, unrealized losses	1	1
Estimated Fair Value	63	67
Total, unrealized losses	1	1
Corporate debt obligations
Investment securities available-for-sale
Less than twelve months, estimated fair value	45,522	30,978
Less than twelve months, unrealized losses	761	154
Twelve months or longer, estimated fair value	2,350	2,423
Twelve months or longer, unrealized losses	156	84
Estimated Fair Value	47,872	33,401
Total, unrealized losses	917	238
U.S. Treasury bonds
Investment securities available-for-sale
Less than twelve months, estimated fair value	8,597	4,767
Less than twelve months, unrealized losses	197	62
Twelve months or longer, estimated fair value	0	0
Twelve months or longer, unrealized losses	0	0
Estimated Fair Value	8,597	4,767
Total, unrealized losses	197	62
Trust preferred securities
Investment securities available-for-sale
Less than twelve months, estimated fair value	0	0
Less than twelve months, unrealized losses	0	0
Twelve months or longer, estimated fair value	0	1,398
Twelve months or longer, unrealized losses	0	73
Estimated Fair Value	0	1,398
Total, unrealized losses	0	73
Marketable equity securities
Investment securities available-for-sale
Less than twelve months, estimated fair value	0	0
Less than twelve months, unrealized losses	0	0
Twelve months or longer, estimated fair value	495	503
Twelve months or longer, unrealized losses	17	9
Estimated Fair Value	495	503
Total, unrealized losses	17	9
Debt Securities
Investment securities available-for-sale
Less than twelve months, estimated fair value	309,887	254,035
Less than twelve months, unrealized losses	6,556	2,266
Twelve months or longer, estimated fair value	202,262	215,168
Twelve months or longer, unrealized losses	8,950	6,155
Estimated Fair Value	512,149	469,203
Total, unrealized losses	15,506	8,421
Investment securities held-to-maturity
Less than twelve months, estimated fair value	76,785	59,132
Less than twelve months, unrealized losses	1,253	531
Twelve months or longer, estimated fair value	32,229	33,790
Twelve months or longer, unrealized losses	1,304	835
Total, estimated fair value	109,014	92,922
Total, unrealized losses	2,557	1,366
Available-for-sale Securities and Held-to-maturity Securities [Abstract]
Less Than Twelve Months, Estimated Fair Value	386,672	313,167
Less Than Twelve Months, Unrealized Losses	7,809	2,797
Twelve Months or Longer, Estimated Fair Value	234,491	248,958
Twelve Months or Longer, Unrealized Losses	10,254	6,990
Total, Estimated Fair Value	621,163	562,125
Total, Unrealized Losses	18,063	9,787
Municipal obligations
Investment securities held-to-maturity
Less than twelve months, estimated fair value	42,717	30,542
Less than twelve months, unrealized losses	591	235
Twelve months or longer, estimated fair value	6,644	7,408
Twelve months or longer, unrealized losses	265	102
Total, estimated fair value	49,361	37,950
Total, unrealized losses	856	337
Foreign government obligations
Investment securities held-to-maturity
Less than twelve months, estimated fair value	0	0
Less than twelve months, unrealized losses	0	0
Twelve months or longer, estimated fair value	497	500
Twelve months or longer, unrealized losses	3	0
Total, estimated fair value	497	500
Total, unrealized losses	$ 3	$ 0

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Investment Securities (Portfolio Maturities)(Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Available for Sale, Amortized Cost
Within 1 year	$ 25,290	$ 23,612
After 1 year through 5 years	162,284	142,772
After 5 years through 10 years	146,756	136,746
Over 10 years	238,222	243,856
Total	572,552	546,986
Available for Sale, Estimated Fair Value
Within 1 year	25,250	23,652
After 1 year through 5 years	159,464	142,029
After 5 years through 10 years	142,749	134,978
Over 10 years	229,925	238,483
Total	$ 557,388	$ 539,142
Available for Sale, Weighted Average Rate
Within 1 year (as a percent)	2.23%	2.27%
After 1 year through 5 years (as a percent)	2.13%	2.05%
After 5 years through 10 years (as a percent)	2.15%	2.06%
Over 10 years (as a percent)	2.15%	2.06%
Total (as a percent)	2.15%	2.07%
Held-to-Maturity, Amortized Cost
Within 1 year	$ 1,470	$ 918
After 1 year through 5 years	60,727	58,335
After 5 years through 10 years	41,863	36,589
Over 10 years	13,292	13,888
Total	117,352	109,730
Held-to-Maturity, Estimated Fair Value
Within 1 year	1,463	916
After 1 year through 5 years	59,838	57,939
After 5 years through 10 years	40,556	35,998
Over 10 years	12,953	13,670
Total	$ 114,810	$ 108,523
Held-to-Maturity, Weighted Average Rate
Within 1 year (as a percent)	1.00%	0.78%
After 1 year through 5 years (as a percent)	1.80%	1.74%
After 5 years through 10 years (as a percent)	1.98%	1.79%
Over 10 years (as a percent)	2.23%	1.98%
Total (as a percent)	1.90%	1.78%

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Investment Securities (Security Sales)(Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Sales of marketable and restricted equity securities	$ 2,700	$ 11,393
Gross gains from sales	1,230	11,612
Gross losses from sales	(68)	(219)
Gain on sales of securities, net	$ 1,162	$ 11,393

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Loans and Leases (Summary of Loan and Lease Balances and Weighted Average Coupon Rates)(Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	$ 5,632,224	$ 5,490,622
Originated, Weighted Average Coupon (as a percent)	4.77%	4.65%
Acquired loans	$ 482,237	$ 240,057
Acquired, Weighted Average Coupon (as a percent)	4.29%	4.49%
Total loans and leases	$ 6,114,461	$ 5,730,679
Total, Weighted Average Coupon (as a percent)	4.73%	4.64%
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 2,278,028	$ 2,174,969
Multi-family mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	793,590	760,670
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	168,640	140,138
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	761,922	705,004
Equipment financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	892,341	866,488
Condominium association
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	52,739	52,619
Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	773,003	660,065
Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	364,870	355,954
Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	29,328	14,772
Commercial real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	$ 3,006,497	$ 2,945,451
Originated, Weighted Average Coupon (as a percent)	4.29%	4.17%
Acquired loans	$ 233,761	$ 130,326
Acquired, Weighted Average Coupon (as a percent)	3.86%	4.39%
Total loans and leases	$ 3,240,258	$ 3,075,777
Total, Weighted Average Coupon (as a percent)	4.26%	4.18%
Commercial real estate loans | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	$ 2,129,110	$ 2,069,392
Originated, Weighted Average Coupon (as a percent)	4.28%	4.17%
Acquired loans	$ 148,918	$ 105,577
Acquired, Weighted Average Coupon (as a percent)	4.44%	4.37%
Total loans and leases	$ 2,278,028	$ 2,174,969
Total, Weighted Average Coupon (as a percent)	4.29%	4.18%
Commercial real estate loans | Multi-family mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	$ 740,603	$ 735,921
Originated, Weighted Average Coupon (as a percent)	4.21%	4.09%
Acquired loans	$ 52,987	$ 24,749
Acquired, Weighted Average Coupon (as a percent)	4.56%	4.48%
Total loans and leases	$ 793,590	$ 760,670
Total, Weighted Average Coupon (as a percent)	4.23%	4.10%
Commercial real estate loans | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	$ 136,784	$ 140,138
Originated, Weighted Average Coupon (as a percent)	4.80%	4.58%
Acquired loans	$ 31,856	$ 0
Acquired, Weighted Average Coupon (as a percent)	0.00%	0.00%
Total loans and leases	$ 168,640	$ 140,138
Total, Weighted Average Coupon (as a percent)	3.89%	4.58%
Commercial loans and leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	$ 1,668,085	$ 1,611,418
Originated, Weighted Average Coupon (as a percent)	6.01%	5.92%
Acquired loans	$ 38,917	$ 12,693
Acquired, Weighted Average Coupon (as a percent)	5.89%	5.82%
Total loans and leases	$ 1,707,002	$ 1,624,111
Total, Weighted Average Coupon (as a percent)	6.01%	5.92%
Commercial loans and leases | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	$ 726,852	$ 696,825
Originated, Weighted Average Coupon (as a percent)	4.49%	4.35%
Acquired loans	$ 35,070	$ 8,179
Acquired, Weighted Average Coupon (as a percent)	5.89%	5.77%
Total loans and leases	$ 761,922	$ 705,004
Total, Weighted Average Coupon (as a percent)	4.55%	4.37%
Commercial loans and leases | Equipment financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	$ 888,494	$ 861,974
Originated, Weighted Average Coupon (as a percent)	7.35%	7.28%
Acquired loans	$ 3,847	$ 4,514
Acquired, Weighted Average Coupon (as a percent)	5.94%	5.92%
Total loans and leases	$ 892,341	$ 866,488
Total, Weighted Average Coupon (as a percent)	7.34%	7.27%
Commercial loans and leases | Condominium association
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	$ 52,739	$ 52,619
Originated, Weighted Average Coupon (as a percent)	4.52%	4.49%
Acquired loans	$ 0	$ 0
Acquired, Weighted Average Coupon (as a percent)	0.00%	0.00%
Total loans and leases	$ 52,739	$ 52,619
Total, Weighted Average Coupon (as a percent)	4.52%	4.49%
Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	$ 957,642	$ 933,753
Originated, Weighted Average Coupon (as a percent)	4.10%	3.95%
Acquired loans	$ 209,559	$ 97,038
Acquired, Weighted Average Coupon (as a percent)	4.48%	4.44%
Total loans and leases	$ 1,167,201	$ 1,030,791
Total, Weighted Average Coupon (as a percent)	4.17%	4.00%
Consumer loans | Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	$ 613,370	$ 604,897
Originated, Weighted Average Coupon (as a percent)	3.90%	3.81%
Acquired loans	$ 159,633	$ 55,168
Acquired, Weighted Average Coupon (as a percent)	4.38%	4.28%
Total loans and leases	$ 773,003	$ 660,065
Total, Weighted Average Coupon (as a percent)	4.00%	3.85%
Consumer loans | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	$ 315,085	$ 314,189
Originated, Weighted Average Coupon (as a percent)	4.42%	4.16%
Acquired loans	$ 49,785	$ 41,765
Acquired, Weighted Average Coupon (as a percent)	4.75%	4.62%
Total loans and leases	$ 364,870	$ 355,954
Total, Weighted Average Coupon (as a percent)	4.47%	4.21%
Consumer loans | Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans	$ 29,187	$ 14,667
Originated, Weighted Average Coupon (as a percent)	4.92%	5.51%
Acquired loans	$ 141	$ 105
Acquired, Weighted Average Coupon (as a percent)	18.00%	18.00%
Total loans and leases	$ 29,328	$ 14,772
Total, Weighted Average Coupon (as a percent)	4.98%	5.60%

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Loans and Leases (Narrative)(Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Receivables [Abstract]
Unamortized deferred loan origination fees and costs	$ 15.8	$ 15.5
Percentage of loans to aggregate outstanding amount in the greater New York/New Jersey Metropolitan area and northeastern states	15.30%
Percentage of loans to aggregate outstanding amount in Other areas of the United States	84.70%
Loans and leases pledged as collateral	$ 2,200.0	$ 2,300.0

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Loans and Leases (Accretable Yield for the Acquired Loan Portfolio)(Details) - Acquired - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Summarized activity in accretable yield for the acquired loan portfolio
Balance at beginning of period	$ 10,522	$ 14,353
Accretion	(1,185)	(1,407)
Reclassification from (to) nonaccretable difference as a result of changes in expected cash flows	316	126
Balance at end of period	$ 9,653	$ 13,072

XML

Allowance for Loan and Lease Losses (Summary of Changes in the Allowance for Loan and Lease Losses and Recorded Investments by Portfolio Segment)(Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Changes in allowance for loan losses
Balance at the beginning of the period	$ 58,592	$ 53,666
Charge-offs	(792)	(1,382)
Recoveries	287	387
Provision (credit) for loan and lease losses	627	13,462
Balance at the end of the period	58,714	66,133
Provisions for credit losses
Total provision for loan and lease losses	627	13,462
Unfunded credit commitments	14	(60)
Total provision for credit losses	641	13,402
Commercial Real Estate
Changes in allowance for loan losses
Balance at the beginning of the period	27,112	27,645
Charge-offs	(3)	(24)
Recoveries	0	140
Provision (credit) for loan and lease losses	252	227
Balance at the end of the period	27,361	27,988
Provisions for credit losses
Total provision for loan and lease losses	252	227
Commercial
Changes in allowance for loan losses
Balance at the beginning of the period	26,333	20,906
Charge-offs	(733)	(1,207)
Recoveries	201	142
Provision (credit) for loan and lease losses	451	13,442
Balance at the end of the period	26,252	33,283
Provisions for credit losses
Total provision for loan and lease losses	451	13,442
Consumer
Changes in allowance for loan losses
Balance at the beginning of the period	5,147	5,115
Charge-offs	(56)	(151)
Recoveries	86	105
Provision (credit) for loan and lease losses	(76)	(207)
Balance at the end of the period	5,101	4,862
Provisions for credit losses
Total provision for loan and lease losses	$ (76)	$ (207)

XML

Allowance for Loan and Lease Losses (Narrative) (Details)	3 Months Ended
	Mar. 31, 2018 USD ($) loan class	Mar. 31, 2017 USD ($)	Dec. 31, 2017 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unfunded credit commitments liability included in other liabilities	$ 1,700,000		$ 1,700,000
Unfunded credit commitments liability charged off	0	$ 0
Total loans and leases	6,114,461,000		5,730,679,000
Related allowance	2,549,000		3,127,000
Specific allowance for loan and lease losses	2,500,000		3,100,000
General allowance for loan and lease losses	56,200,000		55,500,000
Increase (decrease) in total debt restructured loans and leases	(3,100,000)
Total troubled debt restructurings	22,904,000		26,011,000
Nonaccrual Loans and Leases	26,279,000		27,272,000
Increase in general portion of the allowance for loan and lease losses	700,000
Increase (decrease) in specific portion of the allowance for loan and lease losses	(700,000)
Recorded Investment, At end of period	2,200,000	800,000
Financial impact of modification of performing and nonperforming loans	103,000	7,000
Commitments to lend funds to debtors owing receivables whose terms had been modified in troubled debt restructurings	0	$ 0
Taxi Medallion Portfolio
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	18,500,000		19,700,000
Related allowance	2,900,000		3,800,000
Specific allowance for loan and lease losses	2,100,000		2,700,000
General allowance for loan and lease losses	800,000		1,100,000
Increase (decrease) in total debt restructured loans and leases	200,000
Total troubled debt restructurings	$ 3,900,000		3,700,000
Number of Loans/ Leases | loan	1
Nonaccrual Loans and Leases	$ 7,600,000		7,800,000
Charge-off of loans | loan	2
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 2,278,028,000		2,174,969,000
Multi-family mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	793,590,000		760,670,000
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	168,640,000		140,138,000
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	761,922,000		705,004,000
Equipment financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	892,341,000		866,488,000
Condominium association
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	52,739,000		52,619,000
Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	773,003,000		660,065,000
Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	364,870,000		355,954,000
Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 29,328,000		14,772,000
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loan classes within specific portfolio | class	3
Commercial real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loan classes within specific portfolio | class	3
Total loans and leases	$ 3,240,258,000		3,075,777,000
Commercial real estate loans | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 2,278,028,000		2,174,969,000
Percentage of loans to aggregate outstanding amount	37.10%
Commercial real estate loans | Multi-family mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 793,590,000		760,670,000
Percentage of loans to aggregate outstanding amount	13.00%
Commercial real estate loans | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 168,640,000		140,138,000
Percentage of loans to aggregate outstanding amount	2.80%
Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loan classes within specific portfolio | class	3
Total loans and leases	$ 1,707,002,000		1,624,111,000
Commercial loans | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 761,922,000		705,004,000
Percentage of loans to aggregate outstanding amount	12.50%
Commercial loans | Equipment financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 892,341,000		866,488,000
Percentage of loans to aggregate outstanding amount	14.60%
Commercial loans | Condominium association
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 52,739,000		52,619,000
Percentage of loans to aggregate outstanding amount	0.90%
Consumer Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loan classes within specific portfolio | class	3
Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 1,167,201,000		1,030,791,000
Loans not made, loan to value ratio, minimum (as a percent)	80.00%
Number of days past due, non-accrual status (in days)	90 days
Consumer loans | Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 773,003,000		660,065,000
Percentage of loans to aggregate outstanding amount	12.60%
Consumer loans | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 364,870,000		355,954,000
Percentage of loans to aggregate outstanding amount	6.00%
Consumer loans | Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 29,328,000		14,772,000
Percentage of loans to aggregate outstanding amount	0.50%
Acquired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 482,237,000		240,057,000
Related allowance	22,000		22,000
Nonaccrual Loans and Leases	2,144,000		1,997,000
Acquired | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	148,918,000		105,577,000
Acquired | Multi-family mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	52,987,000		24,749,000
Acquired | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	31,856,000		0
Acquired | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	35,070,000		8,179,000
Acquired | Equipment financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	3,847,000		4,514,000
Acquired | Condominium association
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	0		0
Acquired | Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	159,633,000		55,168,000
Acquired | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	49,785,000		41,765,000
Acquired | Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	141,000		105,000
Acquired | Commercial real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	233,761,000		130,326,000
Nonaccrual Loans and Leases	126,000		131,000
Acquired | Commercial real estate loans | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	148,918,000		105,577,000
Nonaccrual Loans and Leases	126,000		131,000
Acquired | Commercial real estate loans | Multi-family mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	52,987,000		24,749,000
Nonaccrual Loans and Leases	0		0
Acquired | Commercial real estate loans | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	31,856,000		0
Nonaccrual Loans and Leases	0		0
Acquired | Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	38,917,000		12,693,000
Nonaccrual Loans and Leases	1,223,000		1,254,000
Acquired | Commercial loans | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	35,070,000		8,179,000
Nonaccrual Loans and Leases	1,223,000		1,254,000
Acquired | Commercial loans | Equipment financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	3,847,000		4,514,000
Nonaccrual Loans and Leases	0		0
Acquired | Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	209,559,000		97,038,000
Related allowance	22,000		22,000
Nonaccrual Loans and Leases	795,000		612,000
Acquired | Consumer loans | Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	159,633,000		55,168,000
Nonaccrual Loans and Leases	0		0
Acquired | Consumer loans | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	49,785,000		41,765,000
Nonaccrual Loans and Leases	795,000		612,000
Acquired | Consumer loans | Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	141,000		105,000
Nonaccrual Loans and Leases	0		0
Receivables Acquired with Deteriorated Credit Quality | Acquired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	136,467,000		140,139,000
Receivables Acquired with Deteriorated Credit Quality | Acquired | Commercial real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	94,000,000		96,082,000
Receivables Acquired with Deteriorated Credit Quality | Acquired | Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	4,325,000		4,807,000
Receivables Acquired with Deteriorated Credit Quality | Acquired | Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 38,142,000		$ 39,250,000

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Allowance for Loan and Lease Losses (Credit Quality Information)(Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Credit Quality Information
Recorded investment	$ 6,114,461	$ 5,730,679
Originated
Credit Quality Information
Recorded investment	5,632,224	5,490,622
Acquired
Credit Quality Information
Recorded investment	482,237	240,057
Commercial real estate
Credit Quality Information
Recorded investment	2,278,028	2,174,969
Commercial real estate | Originated
Credit Quality Information
Recorded investment	2,129,110	2,069,392
Commercial real estate | Acquired
Credit Quality Information
Recorded investment	148,918	105,577
Commercial real estate | Pass | Originated
Credit Quality Information
Recorded investment	2,118,831	2,054,376
Commercial real estate | Pass | Acquired
Credit Quality Information
Recorded investment	136,685	94,244
Commercial real estate | OAEM | Originated
Credit Quality Information
Recorded investment	5,684	8,889
Commercial real estate | OAEM | Acquired
Credit Quality Information
Recorded investment	1,930	9,839
Commercial real estate | Substandard | Originated
Credit Quality Information
Recorded investment	4,394	5,926
Commercial real estate | Substandard | Acquired
Credit Quality Information
Recorded investment	10,303	1,494
Commercial real estate | Doubtful | Originated
Credit Quality Information
Recorded investment	201	201
Commercial real estate | Doubtful | Acquired
Credit Quality Information
Recorded investment	0	0
Multi-family mortgage
Credit Quality Information
Recorded investment	793,590	760,670
Multi-family mortgage | Originated
Credit Quality Information
Recorded investment	740,603	735,921
Multi-family mortgage | Acquired
Credit Quality Information
Recorded investment	52,987	24,749
Multi-family mortgage | Pass | Originated
Credit Quality Information
Recorded investment	740,015	735,313
Multi-family mortgage | Pass | Acquired
Credit Quality Information
Recorded investment	52,706	24,459
Multi-family mortgage | OAEM | Originated
Credit Quality Information
Recorded investment	0	0
Multi-family mortgage | OAEM | Acquired
Credit Quality Information
Recorded investment	0	0
Multi-family mortgage | Substandard | Originated
Credit Quality Information
Recorded investment	588	608
Multi-family mortgage | Substandard | Acquired
Credit Quality Information
Recorded investment	281	290
Multi-family mortgage | Doubtful | Originated
Credit Quality Information
Recorded investment	0	0
Multi-family mortgage | Doubtful | Acquired
Credit Quality Information
Recorded investment	0	0
Construction
Credit Quality Information
Recorded investment	168,640	140,138
Construction | Originated
Credit Quality Information
Recorded investment	136,784	140,138
Construction | Acquired
Credit Quality Information
Recorded investment	31,856	0
Construction | Pass | Originated
Credit Quality Information
Recorded investment	135,924	139,278
Construction | Pass | Acquired
Credit Quality Information
Recorded investment	31,856	0
Construction | OAEM | Originated
Credit Quality Information
Recorded investment	0	0
Construction | OAEM | Acquired
Credit Quality Information
Recorded investment	0	0
Construction | Substandard | Originated
Credit Quality Information
Recorded investment	860	860
Construction | Substandard | Acquired
Credit Quality Information
Recorded investment	0	0
Construction | Doubtful | Originated
Credit Quality Information
Recorded investment	0	0
Construction | Doubtful | Acquired
Credit Quality Information
Recorded investment	0	0
Commercial
Credit Quality Information
Recorded investment	761,922	705,004
Commercial | Originated
Credit Quality Information
Recorded investment	726,852	696,825
Commercial | Acquired
Credit Quality Information
Recorded investment	35,070	8,179
Commercial | Pass | Originated
Credit Quality Information
Recorded investment	692,888	670,265
Commercial | Pass | Acquired
Credit Quality Information
Recorded investment	33,452	6,643
Commercial | OAEM | Originated
Credit Quality Information
Recorded investment	13,762	7,691
Commercial | OAEM | Acquired
Credit Quality Information
Recorded investment	275	265
Commercial | Substandard | Originated
Credit Quality Information
Recorded investment	19,271	17,681
Commercial | Substandard | Acquired
Credit Quality Information
Recorded investment	1,343	1,271
Commercial | Doubtful | Originated
Credit Quality Information
Recorded investment	931	1,188
Commercial | Doubtful | Acquired
Credit Quality Information
Recorded investment	0	0
Equipment financing
Credit Quality Information
Recorded investment	892,341	866,488
Equipment financing | Originated
Credit Quality Information
Recorded investment	888,494	861,974
Equipment financing | Acquired
Credit Quality Information
Recorded investment	3,847	4,514
Equipment financing | Pass | Originated
Credit Quality Information
Recorded investment	878,539	850,006
Equipment financing | Pass | Acquired
Credit Quality Information
Recorded investment	3,836	4,501
Equipment financing | OAEM | Originated
Credit Quality Information
Recorded investment	1,833	3,630
Equipment financing | OAEM | Acquired
Credit Quality Information
Recorded investment	0	0
Equipment financing | Substandard | Originated
Credit Quality Information
Recorded investment	5,357	5,012
Equipment financing | Substandard | Acquired
Credit Quality Information
Recorded investment	11	13
Equipment financing | Doubtful | Originated
Credit Quality Information
Recorded investment	2,765	3,326
Equipment financing | Doubtful | Acquired
Credit Quality Information
Recorded investment	0	0
Condominium association
Credit Quality Information
Recorded investment	52,739	52,619
Condominium association | Originated
Credit Quality Information
Recorded investment	52,739	52,619
Condominium association | Acquired
Credit Quality Information
Recorded investment	0	0
Condominium association | Pass | Originated
Credit Quality Information
Recorded investment	52,739	52,619
Condominium association | Pass | Acquired
Credit Quality Information
Recorded investment	0	0
Condominium association | OAEM | Originated
Credit Quality Information
Recorded investment	0	0
Condominium association | OAEM | Acquired
Credit Quality Information
Recorded investment	0	0
Condominium association | Substandard | Originated
Credit Quality Information
Recorded investment	0	0
Condominium association | Substandard | Acquired
Credit Quality Information
Recorded investment	0	0
Condominium association | Doubtful | Originated
Credit Quality Information
Recorded investment	0	0
Condominium association | Doubtful | Acquired
Credit Quality Information
Recorded investment	0	0
Other consumer
Credit Quality Information
Recorded investment	29,328	14,772
Other consumer | Originated
Credit Quality Information
Recorded investment	29,187	14,667
Other consumer | Acquired
Credit Quality Information
Recorded investment	141	105
Other consumer | Pass | Originated
Credit Quality Information
Recorded investment	29,134	14,628
Other consumer | Pass | Acquired
Credit Quality Information
Recorded investment	140	104
Other consumer | OAEM | Originated
Credit Quality Information
Recorded investment	0	0
Other consumer | OAEM | Acquired
Credit Quality Information
Recorded investment	1	1
Other consumer | Substandard | Originated
Credit Quality Information
Recorded investment	53	39
Other consumer | Substandard | Acquired
Credit Quality Information
Recorded investment	0	0
Other consumer | Doubtful | Originated
Credit Quality Information
Recorded investment	0	0
Other consumer | Doubtful | Acquired
Credit Quality Information
Recorded investment	0	0
Total
Credit Quality Information
Recorded investment	4,976,588	4,714,660
Total | Originated
Credit Quality Information
Recorded investment	4,703,769	4,571,536
Total | Acquired
Credit Quality Information
Recorded investment	272,819	143,124
Total | Pass | Originated
Credit Quality Information
Recorded investment	4,648,070	4,516,485
Total | Pass | Acquired
Credit Quality Information
Recorded investment	258,675	129,951
Total | OAEM | Originated
Credit Quality Information
Recorded investment	21,279	20,210
Total | OAEM | Acquired
Credit Quality Information
Recorded investment	2,206	10,105
Total | Substandard | Originated
Credit Quality Information
Recorded investment	30,523	30,126
Total | Substandard | Acquired
Credit Quality Information
Recorded investment	11,938	3,068
Total | Doubtful | Originated
Credit Quality Information
Recorded investment	3,897	4,715
Total | Doubtful | Acquired
Credit Quality Information
Recorded investment	0	0
Residential mortgage
Credit Quality Information
Recorded investment	$ 773,003	$ 660,065
Percentage of loans to aggregate outstanding amount	100.00%	100.00%
Residential mortgage | Originated
Credit Quality Information
Recorded investment	$ 613,370	$ 604,897
Percentage of loans to aggregate outstanding amount	79.40%	91.60%
Residential mortgage | Acquired
Credit Quality Information
Recorded investment	$ 159,633	$ 55,168
Percentage of loans to aggregate outstanding amount	20.60%	8.40%
Residential mortgage | Loan-to-value ratio, less than 50% | Originated
Credit Quality Information
Recorded investment	$ 155,121	$ 153,373
Percentage of loans to aggregate outstanding amount	20.10%	23.20%
Residential mortgage | Loan-to-value ratio, less than 50% | Acquired
Credit Quality Information
Recorded investment	$ 32,140	$ 16,521
Percentage of loans to aggregate outstanding amount	4.00%	2.50%
Residential mortgage | Loan-to-value ratio, 50% - 69% | Originated
Credit Quality Information
Recorded investment	$ 270,273	$ 265,328
Percentage of loans to aggregate outstanding amount	35.00%	40.20%
Residential mortgage | Loan-to-value ratio, 50% - 69% | Acquired
Credit Quality Information
Recorded investment	$ 45,905	$ 19,182
Percentage of loans to aggregate outstanding amount	5.90%	2.90%
Residential mortgage | Loan-to-value ratio, 70% - 79% | Originated
Credit Quality Information
Recorded investment	$ 166,304	$ 168,272
Percentage of loans to aggregate outstanding amount	21.50%	25.50%
Residential mortgage | Loan-to-value ratio, 70% - 79% | Acquired
Credit Quality Information
Recorded investment	$ 40,067	$ 10,507
Percentage of loans to aggregate outstanding amount	5.20%	1.60%
Residential mortgage | Loan-to-value ratio, 80% and greater than | Originated
Credit Quality Information
Recorded investment	$ 19,988	$ 16,547
Percentage of loans to aggregate outstanding amount	2.60%	2.50%
Residential mortgage | Loan-to-value ratio, 80% and greater than | Acquired
Credit Quality Information
Recorded investment	$ 29,930	$ 7,893
Percentage of loans to aggregate outstanding amount	3.90%	1.20%
Residential mortgage | Data not available | Originated
Credit Quality Information
Recorded investment	$ 1,684	$ 1,377
Percentage of loans to aggregate outstanding amount	0.20%	0.20%
Residential mortgage | Data not available | Acquired
Credit Quality Information
Recorded investment	$ 11,591	$ 1,065
Percentage of loans to aggregate outstanding amount	1.60%	0.20%
Home equity
Credit Quality Information
Recorded investment	$ 364,870	$ 355,954
Percentage of loans to aggregate outstanding amount	100.00%	100.00%
Home equity | Originated
Credit Quality Information
Recorded investment	$ 315,085	$ 314,189
Percentage of loans to aggregate outstanding amount	86.30%	88.20%
Home equity | Acquired
Credit Quality Information
Recorded investment	$ 49,785	$ 41,765
Percentage of loans to aggregate outstanding amount	13.70%	11.80%
Home equity | Loan-to-value ratio, less than 50% | Originated
Credit Quality Information
Recorded investment	$ 144,513	$ 148,137
Percentage of loans to aggregate outstanding amount	39.60%	41.60%
Home equity | Loan-to-value ratio, less than 50% | Acquired
Credit Quality Information
Recorded investment	$ 29,519	$ 25,312
Percentage of loans to aggregate outstanding amount	8.30%	7.10%
Home equity | Loan-to-value ratio, 50% - 69% | Originated
Credit Quality Information
Recorded investment	$ 75,826	$ 75,099
Percentage of loans to aggregate outstanding amount	20.80%	21.10%
Home equity | Loan-to-value ratio, 50% - 69% | Acquired
Credit Quality Information
Recorded investment	$ 13,150	$ 13,883
Percentage of loans to aggregate outstanding amount	3.50%	3.90%
Home equity | Loan-to-value ratio, 70% - 79% | Originated
Credit Quality Information
Recorded investment	$ 66,491	$ 63,742
Percentage of loans to aggregate outstanding amount	18.20%	17.90%
Home equity | Loan-to-value ratio, 70% - 79% | Acquired
Credit Quality Information
Recorded investment	$ 985	$ 943
Percentage of loans to aggregate outstanding amount	0.30%	0.30%
Home equity | Loan-to-value ratio, 80% and greater than | Originated
Credit Quality Information
Recorded investment	$ 28,212	$ 27,122
Percentage of loans to aggregate outstanding amount	7.70%	7.60%
Home equity | Loan-to-value ratio, 80% and greater than | Acquired
Credit Quality Information
Recorded investment	$ 886	$ 582
Percentage of loans to aggregate outstanding amount	0.20%	0.20%
Home equity | Data not available | Originated
Credit Quality Information
Recorded investment	$ 43	$ 89
Percentage of loans to aggregate outstanding amount	0.00%	0.00%
Home equity | Data not available | Acquired
Credit Quality Information
Recorded investment	$ 5,245	$ 1,045
Percentage of loans to aggregate outstanding amount	1.40%	0.30%

XML

Allowance for Loan and Lease Losses Allowance for Loan and Lease Losses (Foreclosed Residential Real Estate Property)(Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Receivables [Abstract]
Recorded investment in mortgage loans collateralized by residential real estate property that are in the process of foreclosure	$ 0	$ 633
On accrual	14,294	16,241
On nonaccrual	8,610	9,770
Total troubled debt restructurings	$ 22,904	$ 26,011

XML

Allowance for Loan and Lease Losses (Past Due Loans)(Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Age analysis of past due loans
Past Due	$ 51,362	$ 50,704
Current	6,063,099	5,679,975
Total Loans and Leases	6,114,461	5,730,679
Loans and Leases Past Due Greater Than 90 Days and Accruing	3,882	3,020
Nonaccrual Loans and Leases	26,279	27,272
Commercial real estate
Age analysis of past due loans
Total Loans and Leases	2,278,028	2,174,969
Multi-family mortgage
Age analysis of past due loans
Total Loans and Leases	793,590	760,670
Construction
Age analysis of past due loans
Total Loans and Leases	168,640	140,138
Commercial
Age analysis of past due loans
Total Loans and Leases	761,922	705,004
Equipment financing
Age analysis of past due loans
Total Loans and Leases	892,341	866,488
Condominium association
Age analysis of past due loans
Total Loans and Leases	52,739	52,619
Residential mortgage
Age analysis of past due loans
Total Loans and Leases	773,003	660,065
Home equity
Age analysis of past due loans
Total Loans and Leases	364,870	355,954
Other consumer
Age analysis of past due loans
Total Loans and Leases	29,328	14,772
Commercial real estate loans
Age analysis of past due loans
Total Loans and Leases	3,240,258	3,075,777
Commercial real estate loans | Commercial real estate
Age analysis of past due loans
Total Loans and Leases	2,278,028	2,174,969
Commercial real estate loans | Multi-family mortgage
Age analysis of past due loans
Total Loans and Leases	793,590	760,670
Commercial real estate loans | Construction
Age analysis of past due loans
Total Loans and Leases	168,640	140,138
Commercial loans and leases
Age analysis of past due loans
Total Loans and Leases	1,707,002	1,624,111
Commercial loans and leases | Commercial
Age analysis of past due loans
Total Loans and Leases	761,922	705,004
Commercial loans and leases | Equipment financing
Age analysis of past due loans
Total Loans and Leases	892,341	866,488
Commercial loans and leases | Condominium association
Age analysis of past due loans
Total Loans and Leases	52,739	52,619
Consumer loans
Age analysis of past due loans
Total Loans and Leases	1,167,201	1,030,791
Consumer loans | Residential mortgage
Age analysis of past due loans
Total Loans and Leases	773,003	660,065
Consumer loans | Home equity
Age analysis of past due loans
Total Loans and Leases	364,870	355,954
Consumer loans | Other consumer
Age analysis of past due loans
Total Loans and Leases	29,328	14,772
31-60 days past due
Age analysis of past due loans
Past Due	27,725	25,040
61-90 days past due
Age analysis of past due loans
Past Due	4,176	7,376
Greater than 90 days past due
Age analysis of past due loans
Past Due	19,461	18,288
Originated
Age analysis of past due loans
Past Due	36,033	44,811
Current	5,596,191	5,445,811
Total Loans and Leases	5,632,224	5,490,622
Loans and Leases Past Due Greater Than 90 Days and Accruing	1	225
Nonaccrual Loans and Leases	24,135	25,275
Originated | Commercial real estate
Age analysis of past due loans
Total Loans and Leases	2,129,110	2,069,392
Originated | Multi-family mortgage
Age analysis of past due loans
Total Loans and Leases	740,603	735,921
Originated | Construction
Age analysis of past due loans
Total Loans and Leases	136,784	140,138
Originated | Commercial
Age analysis of past due loans
Total Loans and Leases	726,852	696,825
Originated | Equipment financing
Age analysis of past due loans
Total Loans and Leases	888,494	861,974
Originated | Condominium association
Age analysis of past due loans
Total Loans and Leases	52,739	52,619
Originated | Residential mortgage
Age analysis of past due loans
Total Loans and Leases	613,370	604,897
Originated | Home equity
Age analysis of past due loans
Total Loans and Leases	315,085	314,189
Originated | Other consumer
Age analysis of past due loans
Total Loans and Leases	29,187	14,667
Originated | Commercial real estate loans
Age analysis of past due loans
Past Due	13,933	21,986
Current	2,992,564	2,923,465
Total Loans and Leases	3,006,497	2,945,451
Loans and Leases Past Due Greater Than 90 Days and Accruing	0	0
Nonaccrual Loans and Leases	5,402	4,650
Originated | Commercial real estate loans | Commercial real estate
Age analysis of past due loans
Past Due	11,744	5,528
Current	2,117,366	2,063,864
Total Loans and Leases	2,129,110	2,069,392
Loans and Leases Past Due Greater Than 90 Days and Accruing	0	0
Nonaccrual Loans and Leases	3,954	3,182
Originated | Commercial real estate loans | Multi-family mortgage
Age analysis of past due loans
Past Due	1,032	8,731
Current	739,571	727,190
Total Loans and Leases	740,603	735,921
Loans and Leases Past Due Greater Than 90 Days and Accruing	0	0
Nonaccrual Loans and Leases	588	608
Originated | Commercial real estate loans | Construction
Age analysis of past due loans
Past Due	1,157	7,727
Current	135,627	132,411
Total Loans and Leases	136,784	140,138
Loans and Leases Past Due Greater Than 90 Days and Accruing	0	0
Nonaccrual Loans and Leases	860	860
Originated | Commercial loans and leases
Age analysis of past due loans
Past Due	19,470	19,695
Current	1,648,615	1,591,723
Total Loans and Leases	1,668,085	1,611,418
Loans and Leases Past Due Greater Than 90 Days and Accruing	0	224
Nonaccrual Loans and Leases	16,588	18,471
Originated | Commercial loans and leases | Commercial
Age analysis of past due loans
Past Due	9,228	9,665
Current	717,624	687,160
Total Loans and Leases	726,852	696,825
Loans and Leases Past Due Greater Than 90 Days and Accruing	0	0
Nonaccrual Loans and Leases	9,927	10,365
Originated | Commercial loans and leases | Equipment financing
Age analysis of past due loans
Past Due	9,226	8,911
Current	879,268	853,063
Total Loans and Leases	888,494	861,974
Loans and Leases Past Due Greater Than 90 Days and Accruing	0	224
Nonaccrual Loans and Leases	6,661	8,106
Originated | Commercial loans and leases | Condominium association
Age analysis of past due loans
Past Due	1,016	1,119
Current	51,723	51,500
Total Loans and Leases	52,739	52,619
Loans and Leases Past Due Greater Than 90 Days and Accruing	0	0
Nonaccrual Loans and Leases	0	0
Originated | Consumer loans
Age analysis of past due loans
Past Due	2,630	3,130
Current	955,012	930,623
Total Loans and Leases	957,642	933,753
Loans and Leases Past Due Greater Than 90 Days and Accruing	1	1
Nonaccrual Loans and Leases	2,145	2,154
Originated | Consumer loans | Residential mortgage
Age analysis of past due loans
Past Due	2,133	2,150
Current	611,237	602,747
Total Loans and Leases	613,370	604,897
Loans and Leases Past Due Greater Than 90 Days and Accruing	0	0
Nonaccrual Loans and Leases	1,962	1,979
Originated | Consumer loans | Home equity
Age analysis of past due loans
Past Due	337	694
Current	314,748	313,495
Total Loans and Leases	315,085	314,189
Loans and Leases Past Due Greater Than 90 Days and Accruing	1	1
Nonaccrual Loans and Leases	130	132
Originated | Consumer loans | Other consumer
Age analysis of past due loans
Past Due	160	286
Current	29,027	14,381
Total Loans and Leases	29,187	14,667
Loans and Leases Past Due Greater Than 90 Days and Accruing	0	0
Nonaccrual Loans and Leases	53	43
Originated | 31-60 days past due
Age analysis of past due loans
Past Due	18,261	23,524
Originated | 31-60 days past due | Commercial real estate loans
Age analysis of past due loans
Past Due	9,795	15,972
Originated | 31-60 days past due | Commercial real estate loans | Commercial real estate
Age analysis of past due loans
Past Due	8,466	3,294
Originated | 31-60 days past due | Commercial real estate loans | Multi-family mortgage
Age analysis of past due loans
Past Due	1,032	6,141
Originated | 31-60 days past due | Commercial real estate loans | Construction
Age analysis of past due loans
Past Due	297	6,537
Originated | 31-60 days past due | Commercial loans and leases
Age analysis of past due loans
Past Due	6,515	5,415
Originated | 31-60 days past due | Commercial loans and leases | Commercial
Age analysis of past due loans
Past Due	1,453	1,344
Originated | 31-60 days past due | Commercial loans and leases | Equipment financing
Age analysis of past due loans
Past Due	4,207	3,214
Originated | 31-60 days past due | Commercial loans and leases | Condominium association
Age analysis of past due loans
Past Due	855	857
Originated | 31-60 days past due | Consumer loans
Age analysis of past due loans
Past Due	1,951	2,137
Originated | 31-60 days past due | Consumer loans | Residential mortgage
Age analysis of past due loans
Past Due	1,553	1,256
Originated | 31-60 days past due | Consumer loans | Home equity
Age analysis of past due loans
Past Due	285	643
Originated | 31-60 days past due | Consumer loans | Other consumer
Age analysis of past due loans
Past Due	113	238
Originated | 61-90 days past due
Age analysis of past due loans
Past Due	3,228	6,869
Originated | 61-90 days past due | Commercial real estate loans
Age analysis of past due loans
Past Due	633	3,311
Originated | 61-90 days past due | Commercial real estate loans | Commercial real estate
Age analysis of past due loans
Past Due	633	391
Originated | 61-90 days past due | Commercial real estate loans | Multi-family mortgage
Age analysis of past due loans
Past Due	0	2,590
Originated | 61-90 days past due | Commercial real estate loans | Construction
Age analysis of past due loans
Past Due	0	330
Originated | 61-90 days past due | Commercial loans and leases
Age analysis of past due loans
Past Due	2,581	3,353
Originated | 61-90 days past due | Commercial loans and leases | Commercial
Age analysis of past due loans
Past Due	1,642	597
Originated | 61-90 days past due | Commercial loans and leases | Equipment financing
Age analysis of past due loans
Past Due	778	2,494
Originated | 61-90 days past due | Commercial loans and leases | Condominium association
Age analysis of past due loans
Past Due	161	262
Originated | 61-90 days past due | Consumer loans
Age analysis of past due loans
Past Due	14	205
Originated | 61-90 days past due | Consumer loans | Residential mortgage
Age analysis of past due loans
Past Due	0	166
Originated | 61-90 days past due | Consumer loans | Home equity
Age analysis of past due loans
Past Due	1	19
Originated | 61-90 days past due | Consumer loans | Other consumer
Age analysis of past due loans
Past Due	13	20
Originated | Greater than 90 days past due
Age analysis of past due loans
Past Due	14,544	14,418
Originated | Greater than 90 days past due | Commercial real estate loans
Age analysis of past due loans
Past Due	3,505	2,703
Originated | Greater than 90 days past due | Commercial real estate loans | Commercial real estate
Age analysis of past due loans
Past Due	2,645	1,843
Originated | Greater than 90 days past due | Commercial real estate loans | Multi-family mortgage
Age analysis of past due loans
Past Due	0	0
Originated | Greater than 90 days past due | Commercial real estate loans | Construction
Age analysis of past due loans
Past Due	860	860
Originated | Greater than 90 days past due | Commercial loans and leases
Age analysis of past due loans
Past Due	10,374	10,927
Originated | Greater than 90 days past due | Commercial loans and leases | Commercial
Age analysis of past due loans
Past Due	6,133	7,724
Originated | Greater than 90 days past due | Commercial loans and leases | Equipment financing
Age analysis of past due loans
Past Due	4,241	3,203
Originated | Greater than 90 days past due | Commercial loans and leases | Condominium association
Age analysis of past due loans
Past Due	0	0
Originated | Greater than 90 days past due | Consumer loans
Age analysis of past due loans
Past Due	665	788
Originated | Greater than 90 days past due | Consumer loans | Residential mortgage
Age analysis of past due loans
Past Due	580	728
Originated | Greater than 90 days past due | Consumer loans | Home equity
Age analysis of past due loans
Past Due	51	32
Originated | Greater than 90 days past due | Consumer loans | Other consumer
Age analysis of past due loans
Past Due	34	28
Acquired
Age analysis of past due loans
Past Due	15,329	5,893
Current	466,908	234,164
Total Loans and Leases	482,237	240,057
Loans and Leases Past Due Greater Than 90 Days and Accruing	3,881	2,795
Nonaccrual Loans and Leases	2,144	1,997
Acquired | Commercial real estate
Age analysis of past due loans
Total Loans and Leases	148,918	105,577
Acquired | Multi-family mortgage
Age analysis of past due loans
Total Loans and Leases	52,987	24,749
Acquired | Construction
Age analysis of past due loans
Total Loans and Leases	31,856	0
Acquired | Commercial
Age analysis of past due loans
Total Loans and Leases	35,070	8,179
Acquired | Equipment financing
Age analysis of past due loans
Total Loans and Leases	3,847	4,514
Acquired | Condominium association
Age analysis of past due loans
Total Loans and Leases	0	0
Acquired | Residential mortgage
Age analysis of past due loans
Total Loans and Leases	159,633	55,168
Acquired | Home equity
Age analysis of past due loans
Total Loans and Leases	49,785	41,765
Acquired | Other consumer
Age analysis of past due loans
Total Loans and Leases	141	105
Acquired | Commercial real estate loans
Age analysis of past due loans
Past Due	10,339	1,667
Current	223,422	128,659
Total Loans and Leases	233,761	130,326
Loans and Leases Past Due Greater Than 90 Days and Accruing	1,534	589
Nonaccrual Loans and Leases	126	131
Acquired | Commercial real estate loans | Commercial real estate
Age analysis of past due loans
Past Due	10,339	1,664
Current	138,579	103,913
Total Loans and Leases	148,918	105,577
Loans and Leases Past Due Greater Than 90 Days and Accruing	1,534	586
Nonaccrual Loans and Leases	126	131
Acquired | Commercial real estate loans | Multi-family mortgage
Age analysis of past due loans
Past Due	0	3
Current	52,987	24,746
Total Loans and Leases	52,987	24,749
Loans and Leases Past Due Greater Than 90 Days and Accruing	0	3
Nonaccrual Loans and Leases	0	0
Acquired | Commercial real estate loans | Construction
Age analysis of past due loans
Past Due	0	0
Current	31,856	0
Total Loans and Leases	31,856	0
Loans and Leases Past Due Greater Than 90 Days and Accruing	0	0
Nonaccrual Loans and Leases	0	0
Acquired | Commercial loans and leases
Age analysis of past due loans
Past Due	978	1,079
Current	37,939	11,614
Total Loans and Leases	38,917	12,693
Loans and Leases Past Due Greater Than 90 Days and Accruing	6	30
Nonaccrual Loans and Leases	1,223	1,254
Acquired | Commercial loans and leases | Commercial
Age analysis of past due loans
Past Due	967	1,066
Current	34,103	7,113
Total Loans and Leases	35,070	8,179
Loans and Leases Past Due Greater Than 90 Days and Accruing	1	17
Nonaccrual Loans and Leases	1,223	1,254
Acquired | Commercial loans and leases | Equipment financing
Age analysis of past due loans
Past Due	11	13
Current	3,836	4,501
Total Loans and Leases	3,847	4,514
Loans and Leases Past Due Greater Than 90 Days and Accruing	5	13
Nonaccrual Loans and Leases	0	0
Acquired | Consumer loans
Age analysis of past due loans
Past Due	4,012	3,147
Current	205,547	93,891
Total Loans and Leases	209,559	97,038
Loans and Leases Past Due Greater Than 90 Days and Accruing	2,341	2,176
Nonaccrual Loans and Leases	795	612
Acquired | Consumer loans | Residential mortgage
Age analysis of past due loans
Past Due	3,399	2,453
Current	156,234	52,715
Total Loans and Leases	159,633	55,168
Loans and Leases Past Due Greater Than 90 Days and Accruing	2,201	1,990
Nonaccrual Loans and Leases	0	0
Acquired | Consumer loans | Home equity
Age analysis of past due loans
Past Due	613	694
Current	49,172	41,071
Total Loans and Leases	49,785	41,765
Loans and Leases Past Due Greater Than 90 Days and Accruing	140	186
Nonaccrual Loans and Leases	795	612
Acquired | Consumer loans | Other consumer
Age analysis of past due loans
Past Due	0	0
Current	141	105
Total Loans and Leases	141	105
Loans and Leases Past Due Greater Than 90 Days and Accruing	0	0
Nonaccrual Loans and Leases	0	0
Acquired | 31-60 days past due
Age analysis of past due loans
Past Due	9,464	1,516
Acquired | 31-60 days past due | Commercial real estate loans
Age analysis of past due loans
Past Due	8,680	1,008
Acquired | 31-60 days past due | Commercial real estate loans | Commercial real estate
Age analysis of past due loans
Past Due	8,680	1,008
Acquired | 31-60 days past due | Commercial real estate loans | Multi-family mortgage
Age analysis of past due loans
Past Due	0	0
Acquired | 31-60 days past due | Commercial real estate loans | Construction
Age analysis of past due loans
Past Due	0	0
Acquired | 31-60 days past due | Commercial loans and leases
Age analysis of past due loans
Past Due	93	0
Acquired | 31-60 days past due | Commercial loans and leases | Commercial
Age analysis of past due loans
Past Due	93	0
Acquired | 31-60 days past due | Commercial loans and leases | Equipment financing
Age analysis of past due loans
Past Due	0	0
Acquired | 31-60 days past due | Consumer loans
Age analysis of past due loans
Past Due	691	508
Acquired | 31-60 days past due | Consumer loans | Residential mortgage
Age analysis of past due loans
Past Due	431	0
Acquired | 31-60 days past due | Consumer loans | Home equity
Age analysis of past due loans
Past Due	260	508
Acquired | 31-60 days past due | Consumer loans | Other consumer
Age analysis of past due loans
Past Due	0	0
Acquired | 61-90 days past due
Age analysis of past due loans
Past Due	948	507
Acquired | 61-90 days past due | Commercial real estate loans
Age analysis of past due loans
Past Due	55	0
Acquired | 61-90 days past due | Commercial real estate loans | Commercial real estate
Age analysis of past due loans
Past Due	55	0
Acquired | 61-90 days past due | Commercial real estate loans | Multi-family mortgage
Age analysis of past due loans
Past Due	0	0
Acquired | 61-90 days past due | Commercial real estate loans | Construction
Age analysis of past due loans
Past Due	0	0
Acquired | 61-90 days past due | Commercial loans and leases
Age analysis of past due loans
Past Due	38	44
Acquired | 61-90 days past due | Commercial loans and leases | Commercial
Age analysis of past due loans
Past Due	38	44
Acquired | 61-90 days past due | Commercial loans and leases | Equipment financing
Age analysis of past due loans
Past Due	0	0
Acquired | 61-90 days past due | Consumer loans
Age analysis of past due loans
Past Due	855	463
Acquired | 61-90 days past due | Consumer loans | Residential mortgage
Age analysis of past due loans
Past Due	767	463
Acquired | 61-90 days past due | Consumer loans | Home equity
Age analysis of past due loans
Past Due	88	0
Acquired | 61-90 days past due | Consumer loans | Other consumer
Age analysis of past due loans
Past Due	0	0
Acquired | Greater than 90 days past due
Age analysis of past due loans
Past Due	4,917	3,870
Acquired | Greater than 90 days past due | Commercial real estate loans
Age analysis of past due loans
Past Due	1,604	659
Acquired | Greater than 90 days past due | Commercial real estate loans | Commercial real estate
Age analysis of past due loans
Past Due	1,604	656
Acquired | Greater than 90 days past due | Commercial real estate loans | Multi-family mortgage
Age analysis of past due loans
Past Due	0	3
Acquired | Greater than 90 days past due | Commercial real estate loans | Construction
Age analysis of past due loans
Past Due	0	0
Acquired | Greater than 90 days past due | Commercial loans and leases
Age analysis of past due loans
Past Due	847	1,035
Acquired | Greater than 90 days past due | Commercial loans and leases | Commercial
Age analysis of past due loans
Past Due	836	1,022
Acquired | Greater than 90 days past due | Commercial loans and leases | Equipment financing
Age analysis of past due loans
Past Due	11	13
Acquired | Greater than 90 days past due | Consumer loans
Age analysis of past due loans
Past Due	2,466	2,176
Acquired | Greater than 90 days past due | Consumer loans | Residential mortgage
Age analysis of past due loans
Past Due	2,201	1,990
Acquired | Greater than 90 days past due | Consumer loans | Home equity
Age analysis of past due loans
Past Due	265	186
Acquired | Greater than 90 days past due | Consumer loans | Other consumer
Age analysis of past due loans
Past Due	$ 0	$ 0

XML

Allowance for Loan and Lease Losses (Recorded Investment)(Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Impaired Loans and Leases
Recorded investment	$ 63,655		$ 58,685
Unpaid principal balance	63,615		58,745
Related allowance	2,549		3,127
Average recorded investment	64,505	$ 80,703
Interest income recognized, Total	353	307
Recorded investment in loans and leases by portfolio segment
Total, Allowance	58,714		58,592
Total Loans and Leases	6,114,461		5,730,679
Commercial real estate loans
Recorded investment in loans and leases by portfolio segment
Total, Allowance	27,361		27,112
Total Loans and Leases	3,240,258		3,075,777
Commercial
Recorded investment in loans and leases by portfolio segment
Total, Allowance	26,252		26,333
Total Loans and Leases	1,707,002		1,624,111
Consumer loans
Recorded investment in loans and leases by portfolio segment
Total, Allowance	5,101		5,147
Total Loans and Leases	1,167,201		1,030,791
Originated
Impaired Loans and Leases
Recorded investment, loans with no related allowance recorded	38,332		38,392
Recorded investment, loans with related allowance recorded	8,087		11,968
Recorded investment	46,419		50,360
Unpaid principal balance with no related allowance recorded	38,303		38,502
Unpaid principal balance with related allowance recorded	8,076		11,918
Unpaid principal balance	46,379		50,420
Related allowance	2,527		3,105
Recorded investment, nonaccrual loans	23,800		24,900
Average recorded investment with no related allowance recorded	39,099	35,727
Average recorded investment with related allowance recorded	8,127	26,322
Average recorded investment	47,226	62,049
Interest income recognized with no related allowance recorded	315	212
Interest income recognized with related allowance recorded	17	49
Interest income recognized, Total	332	261
Recorded investment in loans and leases by portfolio segment
Individually evaluated for impairment, allowance	2,527		3,105
Collectively evaluated for impairment, allowance	55,277		54,447
Total, Allowance	57,804		57,552
Individually evaluated for impairment, Loans and Leases	41,926		45,487
Collectively evaluated for impairment, Loans and Leases	5,590,298		5,445,135
Total Loans and Leases	5,632,224		5,490,622
Originated | Commercial real estate loans
Impaired Loans and Leases
Recorded investment, loans with no related allowance recorded	7,962		9,978
Recorded investment, loans with related allowance recorded	0		3,056
Unpaid principal balance with no related allowance recorded	7,946		9,962
Unpaid principal balance with related allowance recorded	0		3,056
Related allowance	0		0
Average recorded investment with no related allowance recorded	7,985	9,363
Average recorded investment with related allowance recorded	0	4,000
Interest income recognized with no related allowance recorded	30	32
Interest income recognized with related allowance recorded	0	48
Recorded investment in loans and leases by portfolio segment
Individually evaluated for impairment, allowance	0		0
Collectively evaluated for impairment, allowance	26,674		26,366
Total, Allowance	26,674		26,366
Individually evaluated for impairment, Loans and Leases	7,959		13,031
Collectively evaluated for impairment, Loans and Leases	2,998,538		2,932,420
Total Loans and Leases	3,006,497		2,945,451
Originated | Commercial
Impaired Loans and Leases
Recorded investment, loans with no related allowance recorded	27,032		24,906
Recorded investment, loans with related allowance recorded	7,953		8,912
Unpaid principal balance with no related allowance recorded	27,027		25,040
Unpaid principal balance with related allowance recorded	7,942		8,862
Related allowance	2,509		3,105
Average recorded investment with no related allowance recorded	27,761	21,058
Average recorded investment with related allowance recorded	7,993	22,322
Interest income recognized with no related allowance recorded	272	164
Interest income recognized with related allowance recorded	16	1
Recorded investment in loans and leases by portfolio segment
Individually evaluated for impairment, allowance	2,509		3,105
Collectively evaluated for impairment, allowance	23,613		23,078
Total, Allowance	26,122		26,183
Individually evaluated for impairment, Loans and Leases	30,561		29,386
Collectively evaluated for impairment, Loans and Leases	1,637,524		1,582,032
Total Loans and Leases	1,668,085		1,611,418
Originated | Consumer loans
Impaired Loans and Leases
Recorded investment, loans with no related allowance recorded	3,338		3,508
Recorded investment, loans with related allowance recorded	134		0
Unpaid principal balance with no related allowance recorded	3,330		3,500
Unpaid principal balance with related allowance recorded	134		0
Related allowance	18		0
Average recorded investment with no related allowance recorded	3,353	5,306
Average recorded investment with related allowance recorded	134	0
Interest income recognized with no related allowance recorded	13	16
Interest income recognized with related allowance recorded	1	0
Recorded investment in loans and leases by portfolio segment
Individually evaluated for impairment, allowance	18		0
Collectively evaluated for impairment, allowance	4,990		5,003
Total, Allowance	5,008		5,003
Individually evaluated for impairment, Loans and Leases	3,406		3,070
Collectively evaluated for impairment, Loans and Leases	954,236		930,683
Total Loans and Leases	957,642		933,753
Acquired
Impaired Loans and Leases
Recorded investment, loans with no related allowance recorded	17,122		8,210
Recorded investment, loans with related allowance recorded	114		115
Recorded investment	17,236		8,325
Unpaid principal balance with no related allowance recorded	17,122		8,210
Unpaid principal balance with related allowance recorded	114		115
Unpaid principal balance	17,236		8,325
Related allowance	22		22
Recorded investment, nonaccrual loans	2,100		2,000
Average recorded investment with no related allowance recorded	17,165	18,486
Average recorded investment with related allowance recorded	114	168
Average recorded investment	17,279	18,654
Interest income recognized with no related allowance recorded	20	45
Interest income recognized with related allowance recorded	1	1
Interest income recognized, Total	21	46
Recorded investment in loans and leases by portfolio segment
Individually evaluated for impairment, allowance	22		22
Collectively evaluated for impairment, allowance	131		175
Total, Allowance	910		1,040
Individually evaluated for impairment, Loans and Leases	3,411		3,354
Collectively evaluated for impairment, Loans and Leases	342,359		96,564
Total Loans and Leases	482,237		240,057
Acquired | Receivables Acquired with Deteriorated Credit Quality
Recorded investment in loans and leases by portfolio segment
Total, Allowance	757		843
Total Loans and Leases	136,467		140,139
Acquired | Commercial real estate loans
Impaired Loans and Leases
Recorded investment, loans with no related allowance recorded	10,676		1,880
Unpaid principal balance with no related allowance recorded	10,676		1,880
Average recorded investment with no related allowance recorded	10,681	9,419
Average recorded investment with related allowance recorded	0	0
Interest income recognized with no related allowance recorded	1	19
Interest income recognized with related allowance recorded	0	0
Recorded investment in loans and leases by portfolio segment
Individually evaluated for impairment, allowance	0		0
Collectively evaluated for impairment, allowance	104		145
Total, Allowance	687		746
Individually evaluated for impairment, Loans and Leases	0		0
Collectively evaluated for impairment, Loans and Leases	139,761		34,244
Total Loans and Leases	233,761		130,326
Acquired | Commercial real estate loans | Receivables Acquired with Deteriorated Credit Quality
Recorded investment in loans and leases by portfolio segment
Total, Allowance	583		601
Total Loans and Leases	94,000		96,082
Acquired | Commercial
Impaired Loans and Leases
Recorded investment, loans with no related allowance recorded	1,607		1,594
Unpaid principal balance with no related allowance recorded	1,607		1,594
Average recorded investment with no related allowance recorded	1,624	2,934
Average recorded investment with related allowance recorded	0	0
Interest income recognized with no related allowance recorded	4	10
Interest income recognized with related allowance recorded	0	0
Recorded investment in loans and leases by portfolio segment
Individually evaluated for impairment, allowance	0		0
Collectively evaluated for impairment, allowance	12		13
Total, Allowance	130		150
Individually evaluated for impairment, Loans and Leases	1,447		1,487
Collectively evaluated for impairment, Loans and Leases	33,145		6,399
Total Loans and Leases	38,917		12,693
Acquired | Commercial | Receivables Acquired with Deteriorated Credit Quality
Recorded investment in loans and leases by portfolio segment
Total, Allowance	118		137
Total Loans and Leases	4,325		4,807
Acquired | Consumer loans
Impaired Loans and Leases
Recorded investment, loans with no related allowance recorded	4,839		4,736
Recorded investment, loans with related allowance recorded	114		115
Unpaid principal balance with no related allowance recorded	4,839		4,736
Unpaid principal balance with related allowance recorded	114		115
Related allowance	22		22
Average recorded investment with no related allowance recorded	4,860	6,133
Average recorded investment with related allowance recorded	114	168
Interest income recognized with no related allowance recorded	15	16
Interest income recognized with related allowance recorded	1	$ 1
Recorded investment in loans and leases by portfolio segment
Individually evaluated for impairment, allowance	22		22
Collectively evaluated for impairment, allowance	15		17
Total, Allowance	93		144
Individually evaluated for impairment, Loans and Leases	1,964		1,867
Collectively evaluated for impairment, Loans and Leases	169,453		55,921
Total Loans and Leases	209,559		97,038
Acquired | Consumer loans | Receivables Acquired with Deteriorated Credit Quality
Recorded investment in loans and leases by portfolio segment
Total, Allowance	56		105
Total Loans and Leases	$ 38,142		$ 39,250

XML

Allowance for Loan and Lease Losses (Troubled Debt Restructurings)(Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($) loan	Mar. 31, 2017 USD ($) loan
Financing Receivable, Modifications [Line Items]
Recorded Investment, At end of period	$ 2,200	$ 800
Loans with one modification	2,190	765
Adjusted principal
Financing Receivable, Modifications [Line Items]
Loans with one modification	0	375
Combination maturity, principal, interest rate
Financing Receivable, Modifications [Line Items]
Loans with one modification	$ 2,190	$ 390
Originated
Financing Receivable, Modifications [Line Items]
Number of Loans/ Leases | loan	12	3
Recorded Investment, At Modification	$ 2,190	$ 765
Recorded Investment, At end of period	2,190	765
Specific Allowance for Loan and Lease Losses	41	364
Nonaccrual Loans and Leases	635	741
Additional Commitment	$ 0	$ 0
Defaulted, number of loans/leases | loan	1	3
Defaulted, recorded investment	$ 929	$ 800
Originated | Commercial
Financing Receivable, Modifications [Line Items]
Number of Loans/ Leases | loan	6	3
Recorded Investment, At Modification	$ 635	$ 765
Recorded Investment, At end of period	635	765
Specific Allowance for Loan and Lease Losses	41	364
Nonaccrual Loans and Leases	635	741
Additional Commitment	$ 0	$ 0
Defaulted, number of loans/leases | loan	1	3
Defaulted, recorded investment	$ 929	$ 800
Originated | Equipment financing
Financing Receivable, Modifications [Line Items]
Number of Loans/ Leases | loan	6
Recorded Investment, At Modification	$ 1,555
Recorded Investment, At end of period	1,555
Specific Allowance for Loan and Lease Losses	0
Nonaccrual Loans and Leases	0
Additional Commitment	$ 0
Defaulted, number of loans/leases | loan	0
Defaulted, recorded investment	$ 0

XML

Goodwill and Other Intangible Assets (Carrying Value of Goodwill and Other Intangible Assets)(Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Goodwill [Roll Forward]
Goodwill	$ 137,890	$ 137,890
Additions	23,006	0
Balance at end of period	160,896	$ 137,890
Total other intangible assets	7,697		$ 6,044
Total goodwill and other intangible assets	168,593		143,934
Core deposits
Goodwill [Roll Forward]
Total other intangible assets	6,608		4,955
Trade name
Goodwill [Roll Forward]
Total other intangible assets	$ 1,089		$ 1,089

XML

Goodwill and Other Intangible Assets (Narrative)(Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2013
Indefinite-lived Intangible Assets [Line Items]
Weighted-average amortization period	8 years 6 months
Trade name
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets		$ 1.1

XML

Goodwill and Other Intangible Assets (Future Amortization Expense)(Details) $ in Thousands	Mar. 31, 2018 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Remainder of 2018	$ 1,691
Year ending:
2019	1,682
2020	1,247
2021	839
2022	486
2023	256
Thereafter	407
Total	$ 6,608

XML

Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Changes in accumulated other comprehensive (loss) income by component, net of tax
Balance	$ 812,583	$ 702,749
Other comprehensive income	(5,716)	557
Balance	874,746	711,249
Accumulated Other Comprehensive Loss
Changes in accumulated other comprehensive (loss) income by component, net of tax
Balance	(5,950)	(3,818)
Balance	(11,666)	(3,261)
Investment Securities Available-for-Sale
Changes in accumulated other comprehensive (loss) income by component, net of tax
Balance	(6,113)	(4,213)
Other comprehensive income	(5,716)	557
Balance	(11,829)	(3,656)
Postretirement Benefits
Changes in accumulated other comprehensive (loss) income by component, net of tax
Balance	163	395
Other comprehensive income	0	0
Balance	$ 163	$ 395

XML

Derivatives and Hedging Activities (Customer Related Derivative Positions)(Details) $ in Thousands	Mar. 31, 2018 USD ($) derivative	Dec. 31, 2017 USD ($) derivative
Derivatives and Hedging Activities
Collateral posted	$ 25,500	$ 26,700
Receive fixed, pay variable
Derivatives and Hedging Activities
Total	$ 537,694	$ 494,659
Receive fixed, pay variable | Derivatives not designed as hedging instruments
Derivatives and Hedging Activities
Number of Positions | derivative	66,000	66,000
Notional Amount Maturing, Less than 1 year	$ 3,872	$ 3,903
Notional Amount Maturing, Less than 2 years	2,010	2,036
Notional Amount Maturing, Less than 3 years	27,607	27,992
Notional Amount Maturing, Less than 4 years	0	0
Notional Amount Maturing, Thereafter	504,205	460,728
Total	537,694	494,659
Fair Value	13,594	8,865
Pay fixed, receive variable
Derivatives and Hedging Activities
Total	$ 537,694	$ 494,659
Pay fixed, receive variable | Derivatives not designed as hedging instruments
Derivatives and Hedging Activities
Number of Positions | derivative	66,000	66,000
Notional Amount Maturing, Less than 1 year	$ 3,872	$ 3,903
Notional Amount Maturing, Less than 2 years	2,010	2,036
Notional Amount Maturing, Less than 3 years	27,607	27,992
Notional Amount Maturing, Less than 4 years	0	0
Notional Amount Maturing, Thereafter	504,205	460,728
Total	537,694	494,659
Fair Value	13,594	8,865
Risk participation-out agreements
Derivatives and Hedging Activities
Total	$ 37,162	$ 36,627
Risk participation-out agreements | Derivatives not designed as hedging instruments
Derivatives and Hedging Activities
Number of Positions | derivative	8,000	8,000
Notional Amount Maturing, Less than 1 year	$ 0	$ 0
Notional Amount Maturing, Less than 2 years	0	0
Notional Amount Maturing, Less than 3 years	8,495	8,613
Notional Amount Maturing, Less than 4 years	0	0
Notional Amount Maturing, Thereafter	28,667	28,014
Total	37,162	36,627
Fair Value	43	65
Risk participation-in agreements
Derivatives and Hedging Activities
Total	$ 3,825	$ 3,825
Risk participation-in agreements | Derivatives not designed as hedging instruments
Derivatives and Hedging Activities
Number of Positions | derivative	1,000	1,000
Notional Amount Maturing, Less than 1 year	$ 0	$ 0
Notional Amount Maturing, Less than 2 years	0	0
Notional Amount Maturing, Less than 3 years	0	0
Notional Amount Maturing, Less than 4 years	0	0
Notional Amount Maturing, Thereafter	3,825	3,825
Total	3,825	3,825
Fair Value	7	10
Buys foreign currency, sells U.S. currency | Foreign exchange contracts
Derivatives and Hedging Activities
Total	$ 1,330	$ 1,495
Buys foreign currency, sells U.S. currency | Foreign exchange contracts | Derivatives not designed as hedging instruments
Derivatives and Hedging Activities
Number of Positions | derivative	18,000	22,000
Notional Amount Maturing, Less than 1 year	$ 1,330	$ 1,495
Notional Amount Maturing, Less than 2 years	0	0
Notional Amount Maturing, Less than 3 years	0	0
Notional Amount Maturing, Less than 4 years	0	0
Notional Amount Maturing, Thereafter	0	0
Total	1,330	1,495
Fair Value	65	65
Sells foreign currency, buys U.S. currency | Foreign exchange contracts
Derivatives and Hedging Activities
Total	$ 1,335	$ 1,502
Sells foreign currency, buys U.S. currency | Foreign exchange contracts | Derivatives not designed as hedging instruments
Derivatives and Hedging Activities
Number of Positions | derivative	36,000	44,000
Notional Amount Maturing, Less than 1 year	$ 1,335	$ 1,502
Notional Amount Maturing, Less than 2 years	0	0
Notional Amount Maturing, Less than 3 years	0	0
Notional Amount Maturing, Less than 4 years	0	0
Notional Amount Maturing, Thereafter	0	0
Total	1,335	1,502
Fair Value	$ 60	$ 72

XML

Derivatives and Hedging Activities (Offsetting of Derivatives and Amounts Subject to Master Netting Agreements)(Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Asset derivatives
Gross Amounts Recognized, Assets	$ 13,702,000	$ 9,002,000
Net Amounts Presented in the Statement of Financial Position	13,702,000	9,002,000
Cash Collateral Pledged	530,000
Net Amount	13,172,000	9,002,000
Liability derivatives
Gross Amounts Recognized, Liabilities	13,661,000	8,940,000
Net Amounts Presented in the Statement of Financial Position	13,661,000	8,940,000
Gross Amounts Not Offset in the Statement of Financial Position
Financial Instruments Pledged	24,017,000	25,159,000
Cash Collateral Pledged	1,510,000	1,510,000
Net Amount	67,000	0
Loan level derivatives
Asset derivatives
Gross Amounts Recognized, Assets	13,594,000	8,865,000
Net Amounts Presented in the Statement of Financial Position	13,594,000	8,865,000
Cash Collateral Pledged	530,000
Net Amount	13,064,000	8,865,000
Liability derivatives
Gross Amounts Recognized, Liabilities	13,594,000	8,865,000
Net Amounts Presented in the Statement of Financial Position	13,594,000	8,865,000
Gross Amounts Not Offset in the Statement of Financial Position
Financial Instruments Pledged	24,017,000	25,159,000
Cash Collateral Pledged	1,510,000	1,510,000
Net Amount	0	0
Risk participation-out agreements
Asset derivatives
Gross Amounts Recognized, Assets	43,000	65,000
Net Amounts Presented in the Statement of Financial Position	43,000	65,000
Net Amount	43,000	65,000
Risk participation-in agreements
Liability derivatives
Gross Amounts Recognized, Liabilities	7,000	10,000
Net Amounts Presented in the Statement of Financial Position	7,000	10,000
Gross Amounts Not Offset in the Statement of Financial Position
Net Amount	7,000	0
Foreign exchange contracts
Asset derivatives
Gross Amounts Recognized, Assets	65,000	72,000
Net Amounts Presented in the Statement of Financial Position	65,000	72,000
Net Amount	65,000	72,000
Liability derivatives
Gross Amounts Recognized, Liabilities	60,000	65,000
Net Amounts Presented in the Statement of Financial Position	60,000	65,000
Gross Amounts Not Offset in the Statement of Financial Position
Net Amount	$ 60,000	$ 0

XML

Stock Based Compensation (Details) $ in Millions	3 Months Ended
	Mar. 31, 2018 USD ($) financial_institution plan shares	Mar. 31, 2017 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of share-based compensation plans | plan	3
Shares issued upon satisfaction of required conditions of the Plans	0
Performance-based shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of financial institutions comprising peer group | financial_institution	17
Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of authorized shares	1,750,000
Share-based compensation expense | $	$ 0.7	$ 0.6
2003 RRP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of authorized shares	1,250,000
2011 Restricted Stock Award Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of authorized shares	500,000
Vesting equally over three years | Time-based shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percent of shares in tranche	50.00%
Award vesting period	3 years
Vesting, First Anniversary | Time-based shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting percentage	33.33%
Vesting, Second Anniversary | Time-based shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting percentage	33.33%
Vesting, Third Anniversary | Time-based shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting percentage	33.33%
Vesting after achievement of performance targets | Performance-based shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percent of shares in tranche	50.00%
Award vesting period	3 years

XML

Earnings per Share (EPS) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Numerator:
Net income	$ 18,633	$ 13,445
Denominator:
Weighted average shares outstanding	77,879,593	70,386,766
Effect of dilutive securities (in shares)	288,207	457,330
Adjusted weighted average shares outstanding	78,167,800	70,844,096
Basic EPS (in dollars per share)	$ 0.24	$ 0.19
Diluted EPS (in dollars per share)	$ 0.24	$ 0.19

XML

Fair Value of Financial Instruments (Carrying and Vair Value of Assets and Liabilities on a Recurring Basis)(Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Assets:
Investment securities available-for-sale	$ 558,357	$ 540,124
Derivatives	13,702	9,002
Liabilities:
Loan level derivatives	$ 13,661	8,940
Changes in generic pricing of securities period one, considered for analyzing changes in prices obtained from pricing service (in years)	15 years
Changes in generic pricing of securities period two, considered for analyzing changes in prices obtained from pricing service (in years)	30 years
Recurring basis | Investment securities available for sale
Assets:
Investment securities available-for-sale	$ 558,357	540,124
Recurring basis | GSE debentures
Assets:
Investment securities available-for-sale	180,968	149,924
Recurring basis | GSE CMOs
Assets:
Investment securities available-for-sale	119,697	127,022
Recurring basis | GSE MBSs
Assets:
Investment securities available-for-sale	192,185	189,313
Recurring basis | SBA commercial loan asset-backed securities
Assets:
Investment securities available-for-sale	69	72
Recurring basis | Corporate debt obligations
Assets:
Investment securities available-for-sale	55,872	62,683
Recurring basis | U.S. Treasury bonds
Assets:
Investment securities available-for-sale	8,597	8,730
Recurring basis | Trust preferred securities
Assets:
Investment securities available-for-sale	0	1,398
Recurring basis | Marketable equity securities
Assets:
Investment securities available-for-sale	969	982
Recurring basis | Level 1 | Investment securities available for sale
Assets:
Investment securities available-for-sale	969	982
Recurring basis | Level 1 | GSE debentures
Assets:
Investment securities available-for-sale	0	0
Recurring basis | Level 1 | GSE CMOs
Assets:
Investment securities available-for-sale	0	0
Recurring basis | Level 1 | GSE MBSs
Assets:
Investment securities available-for-sale	0	0
Recurring basis | Level 1 | SBA commercial loan asset-backed securities
Assets:
Investment securities available-for-sale	0	0
Recurring basis | Level 1 | Corporate debt obligations
Assets:
Investment securities available-for-sale	0	0
Recurring basis | Level 1 | U.S. Treasury bonds
Assets:
Investment securities available-for-sale	0	0
Recurring basis | Level 1 | Trust preferred securities
Assets:
Investment securities available-for-sale	0	0
Recurring basis | Level 1 | Marketable equity securities
Assets:
Investment securities available-for-sale	969	982
Recurring basis | Level 2 | Investment securities available for sale
Assets:
Investment securities available-for-sale	557,388	539,142
Recurring basis | Level 2 | GSE debentures
Assets:
Investment securities available-for-sale	180,968	149,924
Recurring basis | Level 2 | GSE CMOs
Assets:
Investment securities available-for-sale	119,697	127,022
Recurring basis | Level 2 | GSE MBSs
Assets:
Investment securities available-for-sale	192,185	189,313
Recurring basis | Level 2 | SBA commercial loan asset-backed securities
Assets:
Investment securities available-for-sale	69	72
Recurring basis | Level 2 | Corporate debt obligations
Assets:
Investment securities available-for-sale	55,872	62,683
Recurring basis | Level 2 | U.S. Treasury bonds
Assets:
Investment securities available-for-sale	8,597	8,730
Recurring basis | Level 2 | Trust preferred securities
Assets:
Investment securities available-for-sale	0	1,398
Recurring basis | Level 2 | Marketable equity securities
Assets:
Investment securities available-for-sale	0	0
Recurring basis | Level 3 | Investment securities available for sale
Assets:
Investment securities available-for-sale	0	0
Recurring basis | Level 3 | GSE debentures
Assets:
Investment securities available-for-sale	0	0
Recurring basis | Level 3 | GSE CMOs
Assets:
Investment securities available-for-sale	0	0
Recurring basis | Level 3 | GSE MBSs
Assets:
Investment securities available-for-sale	0	0
Recurring basis | Level 3 | SBA commercial loan asset-backed securities
Assets:
Investment securities available-for-sale	0	0
Recurring basis | Level 3 | Corporate debt obligations
Assets:
Investment securities available-for-sale	0	0
Recurring basis | Level 3 | U.S. Treasury bonds
Assets:
Investment securities available-for-sale	0	0
Recurring basis | Level 3 | Trust preferred securities
Assets:
Investment securities available-for-sale	0	0
Recurring basis | Level 3 | Marketable equity securities
Assets:
Investment securities available-for-sale	0	0
Loan level derivatives
Assets:
Derivatives	13,594	8,865
Liabilities:
Loan level derivatives	13,594	8,865
Loan level derivatives | Recurring basis
Assets:
Derivatives	13,594	8,865
Liabilities:
Loan level derivatives	13,594	8,865
Loan level derivatives | Recurring basis | Level 1
Assets:
Derivatives	0	0
Liabilities:
Loan level derivatives	0	0
Loan level derivatives | Recurring basis | Level 2
Assets:
Derivatives	13,594	8,865
Liabilities:
Loan level derivatives	13,594	8,865
Loan level derivatives | Recurring basis | Level 3
Assets:
Derivatives	0	0
Liabilities:
Loan level derivatives	0	0
Risk participation-out agreements
Assets:
Derivatives	43	65
Risk participation-out agreements | Recurring basis
Assets:
Derivatives	43	65
Risk participation-out agreements | Recurring basis | Level 1
Assets:
Derivatives	0	0
Risk participation-out agreements | Recurring basis | Level 2
Assets:
Derivatives	43	65
Risk participation-out agreements | Recurring basis | Level 3
Assets:
Derivatives	0	0
Risk participation-in agreements
Liabilities:
Loan level derivatives	7	10
Risk participation-in agreements | Recurring basis
Liabilities:
Loan level derivatives	7	10
Risk participation-in agreements | Recurring basis | Level 1
Liabilities:
Loan level derivatives	0	0
Risk participation-in agreements | Recurring basis | Level 2
Liabilities:
Loan level derivatives	7	10
Risk participation-in agreements | Recurring basis | Level 3
Liabilities:
Loan level derivatives	0	0
Foreign exchange contracts
Assets:
Derivatives	65	72
Liabilities:
Loan level derivatives	60	65
Foreign exchange contracts | Recurring basis
Assets:
Derivatives	65	72
Liabilities:
Loan level derivatives	60	65
Foreign exchange contracts | Recurring basis | Level 1
Assets:
Derivatives	0	0
Liabilities:
Loan level derivatives	0	0
Foreign exchange contracts | Recurring basis | Level 2
Assets:
Derivatives	65	72
Liabilities:
Loan level derivatives	60	65
Foreign exchange contracts | Recurring basis | Level 3
Assets:
Derivatives	0	0
Liabilities:
Loan level derivatives	$ 0	$ 0

XML

Fair Value of Financial Instruments (Assets and Liabilities Recorded at Fair Value on a Non-Recurring Basis)(Details) - Nonrecurring basis - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Fair value of assets and liabilities
Total assets measured at fair value on a non-recurring basis	$ 21,247	$ 25,614
Level 1
Fair value of assets and liabilities
Total assets measured at fair value on a non-recurring basis	0	0
Level 2
Fair value of assets and liabilities
Total assets measured at fair value on a non-recurring basis	728	1,184
Level 3
Fair value of assets and liabilities
Total assets measured at fair value on a non-recurring basis	20,519	24,430
Collateral-dependent impaired loans and leases
Fair value of assets and liabilities
Total assets measured at fair value on a non-recurring basis	17,284	21,195
Collateral-dependent impaired loans and leases | Level 1
Fair value of assets and liabilities
Total assets measured at fair value on a non-recurring basis	0	0
Collateral-dependent impaired loans and leases | Level 2
Fair value of assets and liabilities
Total assets measured at fair value on a non-recurring basis	0	0
Collateral-dependent impaired loans and leases | Level 3
Fair value of assets and liabilities
Total assets measured at fair value on a non-recurring basis	17,284	21,195
OREO
Fair value of assets and liabilities
Total assets measured at fair value on a non-recurring basis	3,235	3,235
OREO | Level 1
Fair value of assets and liabilities
Total assets measured at fair value on a non-recurring basis	0	0
OREO | Level 2
Fair value of assets and liabilities
Total assets measured at fair value on a non-recurring basis	0	0
OREO | Level 3
Fair value of assets and liabilities
Total assets measured at fair value on a non-recurring basis	3,235	3,235
Repossessed assets
Fair value of assets and liabilities
Total assets measured at fair value on a non-recurring basis	728	1,184
Repossessed assets | Level 1
Fair value of assets and liabilities
Total assets measured at fair value on a non-recurring basis	0	0
Repossessed assets | Level 2
Fair value of assets and liabilities
Total assets measured at fair value on a non-recurring basis	728	1,184
Repossessed assets | Level 3
Fair value of assets and liabilities
Total assets measured at fair value on a non-recurring basis	$ 0	$ 0

XML

Fair Value of Financial Instruments (Quantitative Information for Level 3 Assets Measured at Fair Value on a Recurring Basis)(Details) - Level 3 - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Recurring basis | Collateral-dependent impaired loans and leases | Appraisal of collateral
Quantitative information for Level 3 Fair Value Measurements Assets
Fair value of assets	$ 17,284	$ 21,195
Recurring basis | Other real estate owned | Appraisal of collateral
Quantitative information for Level 3 Fair Value Measurements Assets
Fair value of assets	$ 3,235	$ 3,235
Minimum | Discount for Costs to Sell
Quantitative information for Level 3 Fair Value Measurements Assets
Fair value inputs, basis spread (as a percent)	0.00%
Minimum | Appraisal Adjustments
Quantitative information for Level 3 Fair Value Measurements Assets
Fair value inputs, basis spread (as a percent)	0.00%
Maximum | Discount for Costs to Sell
Quantitative information for Level 3 Fair Value Measurements Assets
Fair value inputs, basis spread (as a percent)	10.00%
Maximum | Appraisal Adjustments
Quantitative information for Level 3 Fair Value Measurements Assets
Fair value inputs, basis spread (as a percent)	15.00%

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Fair Value of Financial Instruments (Estimated Fair Values of Financial Instruments)(Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Financial assets:
Investment securities held-to-maturity:	$ 114,810	$ 108,523
Loans and leases, net	6,055,747	5,672,087
Restricted equity securities	66,164	59,369
Derivative, assets	13,702	9,002
Financial liabilities:
Borrowed funds	33,585	47,639
Derivatives, liabilities	13,661	8,940
Level 1
Financial assets:
Loans held-for-sale	0	0
Loans and leases, net	0	0
Restricted equity securities	0	0
Financial liabilities:
Certificates of deposit	0	0
Borrowed funds	0	0
Level 2
Financial assets:
Loans held-for-sale	756	2,628
Loans and leases, net	0	0
Restricted equity securities	0	0
Financial liabilities:
Certificates of deposit	1,346,500	1,198,201
Borrowed funds	1,075,857	995,335
Level 3
Financial assets:
Loans held-for-sale	0	0
Loans and leases, net	5,947,840	5,594,543
Restricted equity securities	66,164	59,369
Financial liabilities:
Certificates of deposit	0	0
Borrowed funds	0	0
Carrying Value
Financial assets:
Loans held-for-sale	756	2,628
Loans and leases, net	6,055,747	5,672,087
Restricted equity securities	66,164	59,369
Financial liabilities:
Certificates of deposit	1,361,722	1,207,470
Borrowed funds	1,099,429	1,020,819
Estimated Fair Value
Financial assets:
Loans held-for-sale	756	2,628
Loans and leases, net	5,947,840	5,594,543
Restricted equity securities	66,164	59,369
Financial liabilities:
Certificates of deposit	1,346,500	1,198,201
Borrowed funds	1,075,857	995,335
GSE debentures
Financial assets:
Investment securities held-to-maturity:	49,175	40,801
GSE debentures | Level 1
Financial assets:
Investment securities held-to-maturity:	0	0
GSE debentures | Level 2
Financial assets:
Investment securities held-to-maturity:	49,175	40,801
GSE debentures | Level 3
Financial assets:
Investment securities held-to-maturity:	0	0
GSE debentures | Carrying Value
Financial assets:
Investment securities held-to-maturity:	50,529	41,612
GSE debentures | Estimated Fair Value
Financial assets:
Investment securities held-to-maturity:	49,175	40,801
GSE MBSs
Financial assets:
Investment securities held-to-maturity:	13,004	13,705
GSE MBSs | Level 1
Financial assets:
Investment securities held-to-maturity:	0	0
GSE MBSs | Level 2
Financial assets:
Investment securities held-to-maturity:	13,004	13,705
GSE MBSs | Level 3
Financial assets:
Investment securities held-to-maturity:	0	0
GSE MBSs | Carrying Value
Financial assets:
Investment securities held-to-maturity:	13,344	13,923
GSE MBSs | Estimated Fair Value
Financial assets:
Investment securities held-to-maturity:	13,004	13,705
Municipal obligations
Financial assets:
Investment securities held-to-maturity:	52,134	53,517
Municipal obligations | Level 1
Financial assets:
Investment securities held-to-maturity:	0	0
Municipal obligations | Level 2
Financial assets:
Investment securities held-to-maturity:	52,134	53,517
Municipal obligations | Level 3
Financial assets:
Investment securities held-to-maturity:	0	0
Municipal obligations | Carrying Value
Financial assets:
Investment securities held-to-maturity:	52,979	53,695
Municipal obligations | Estimated Fair Value
Financial assets:
Investment securities held-to-maturity:	52,134	53,517
Foreign government obligations
Financial assets:
Investment securities held-to-maturity:	497	500
Foreign government obligations | Level 1
Financial assets:
Investment securities held-to-maturity:	0	0
Foreign government obligations | Level 2
Financial assets:
Investment securities held-to-maturity:	0	0
Foreign government obligations | Level 3
Financial assets:
Investment securities held-to-maturity:	497	500
Foreign government obligations | Carrying Value
Financial assets:
Investment securities held-to-maturity:	500	500
Foreign government obligations | Estimated Fair Value
Financial assets:
Investment securities held-to-maturity:	497	500
Loan level derivatives
Financial assets:
Derivative, assets	13,594	8,865
Financial liabilities:
Derivatives, liabilities	13,594	8,865
Risk participation-out agreements
Financial assets:
Derivative, assets	43	65
Foreign exchange contracts
Financial assets:
Derivative, assets	65	72
Financial liabilities:
Derivatives, liabilities	$ 60	$ 65

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Commitments and Contingencies (Financial Instrument with Off-balance-sheet Risk)(Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Loan commitments
Unadvanced portion of loans and leases	$ 608,440,000	$ 571,668,000
Unused lines of credit:
Home equity	435,594,000	407,552,000
Other consumer	29,730,000	34,191,000
Other commercial	336,000	323,000
Unused letters of credit:
Financial standby letters of credit	9,972,000	12,422,000
Performance standby letters of credit	736,000	736,000
Commercial and similar letters of credit	184,000	184,000
Fair value of interest rate swap assets	13,700,000	9,100,000
Fair value of interest rate swap liabilities	13,700,000	8,900,000
Derivative asset	13,702,000	9,002,000
Derivative liability	13,661,000	8,940,000
Commercial real estate
Loan commitments
Commitments to originate loans and leases	34,112,000	76,653,000
Commercial
Loan commitments
Commitments to originate loans and leases	106,956,000	83,032,000
Residential mortgage
Loan commitments
Commitments to originate loans and leases	24,162,000	28,745,000
Receive fixed, pay variable
Unused letters of credit:
Derivatives	537,694,000	494,659,000
Pay fixed, receive variable
Unused letters of credit:
Derivatives	537,694,000	494,659,000
Risk participation-out agreements
Unused letters of credit:
Derivatives	37,162,000	36,627,000
Derivative asset	43,000	65,000
Risk participation-in agreements
Unused letters of credit:
Derivatives	3,825,000	3,825,000
Derivative liability	7,000	10,000
Foreign exchange contracts
Unused letters of credit:
Derivative asset	65,000	72,000
Derivative liability	60,000	65,000
Foreign exchange contracts | Buys foreign currency, sells U.S. currency
Unused letters of credit:
Derivatives	1,330,000	1,495,000
Foreign exchange contracts | Sells foreign currency, buys U.S. currency
Unused letters of credit:
Derivatives	$ 1,335,000	$ 1,502,000

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Commitments and Contingencies (Lease Commitments)(Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Summary of future minimum rental payments under noncancellable operating leases year ending December 31
Remainder of 2018	$ 4,323
2018	5,366
2019	4,691
2020	3,635
2021	2,807
2022	2,225
Thereafter	7,957
Total	31,004		$ 29,665
Total rental expense	$ 1,400	$ 1,400
Minimum
Operating Leased Assets [Line Items]
Term of operating lease	5 years
Maximum
Operating Leased Assets [Line Items]
Term of operating lease	25 years