Berkshire Hills Bancorp (BHLB) 10-Q 9 Nov 17 2017 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Nov. 07, 2017
Document and Entity Information
Entity Registrant Name	BERKSHIRE HILLS BANCORP INC
Entity Central Index Key	1,108,134
Document Type	10-Q
Document Period End Date	Sep. 30, 2017
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		45,267,321
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q3

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Assets
Cash and due from banks	$ 62,827	$ 71,494
Short-term investments	29,219	41,581
Total cash and cash equivalents	92,046	113,075
Trading security, at fair value	12,603	13,229
Securities available for sale, at fair value	1,341,013	1,209,537
Securities held to maturity (fair values of $402,799 and $337,680)	395,065	334,368
Federal Home Loan Bank stock and other restricted securities	75,117	71,112
Total securities	1,823,798	1,628,246
Loans held for sale, at fair value	143,745	120,673
Commercial real estate	2,671,237	2,616,438
Commercial and industrial loans	1,254,947	1,062,038
Residential mortgages	1,983,126	1,893,131
Consumer loans	1,038,096	978,180
Total loans	6,947,406	6,549,787
Less: Allowance for loan losses	(49,004)	(43,998)
Net loans	6,898,402	6,505,789
Premises and equipment, net	94,729	93,215
Other real estate owned	288	151
Goodwill	403,106	403,106
Other intangible assets	17,136	19,445
Cash surrender value of bank-owned life insurance policies	161,290	139,257
Deferred tax assets, net	39,467	41,128
Other assets	92,696	98,457
Total assets	9,766,703	9,162,542
Liabilities
Demand deposits	1,221,043	1,278,875
NOW deposits	573,607	570,583
Money market deposits	1,751,190	1,781,605
Savings deposits	670,683	657,486
Time deposits	2,573,623	2,333,543
Total deposits	6,790,146	6,622,092
Short-term debt	1,061,300	1,082,044
Long-term Federal Home Loan Bank advances	338,054	142,792
Subordinated borrowings	89,295	89,161
Total borrowings	1,488,649	1,313,997
Other liabilities	203,381	133,155
Total liabilities	8,482,176	8,069,244
Shareholders’ equity
Common stock ($.01 par value; 50,000,000 shares authorized and 41,369,819 shares issued and 40,423,777 shares outstanding in 2017; 36,732,129 shares issued and 35,672,817 shares outstanding in 2016)	412	366
Additional paid-in capital	1,053,509	898,989
Unearned compensation	(7,770)	(6,374)
Retained earnings	251,835	217,494
Accumulated other comprehensive income	11,187	9,766
Treasury stock, at cost (946,042 shares in 2017 and 1,059,312 shares in 2016)	(24,646)	(26,943)
Total shareholders’ equity	1,284,527	1,093,298
Total liabilities and shareholders’ equity	$ 9,766,703	$ 9,162,542

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Securities held to maturity, fair value	$ 402,799	$ 337,680
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, shares issued (in shares)	41,369,819	36,732,129
Common stock, shares outstanding (in shares)	40,423,777	35,672,817
Treasury stock (in shares)	946,042	1,059,312

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Interest and dividend income
Loans	$ 76,024	$ 61,571	$ 216,950	$ 179,716
Securities and other	13,036	8,940	37,485	28,289
Total interest and dividend income	89,060	70,511	254,435	208,005
Interest expense
Deposits	10,984	7,790	30,053	22,327
Borrowings	6,078	4,750	15,953	12,569
Total interest expense	17,062	12,540	46,006	34,896
Net interest income	71,998	57,971	208,429	173,109
Non-interest income
Mortgage banking originations	13,374	1,862	42,333	4,018
Loan related income	6,081	5,102	15,535	11,046
Deposit related fees	6,445	6,278	19,294	18,678
Insurance commissions and fees	2,581	2,601	8,305	8,154
Wealth management fees	2,315	2,269	7,127	7,006
Total fee income	30,796	18,112	92,594	48,902
Other, net	(2,255)	188	(2,438)	(440)
(Loss) Gain on sale of securities, net	(1)	78	12,568	101
Gain on sale of business operations, net	296	563	296	563
Loss on termination of hedges	0	0	(6,629)	0
Total non-interest income	28,836	18,941	96,391	49,126
Total net revenue	100,834	76,912	304,820	222,235
Provision for loan losses	4,900	4,734	14,884	13,262
Non-interest expense
Compensation and benefits	37,643	26,119	110,759	76,497
Occupancy and equipment	8,267	6,650	25,971	19,900
Technology and communications	6,644	4,902	19,614	14,573
Marketing and promotion	2,128	671	7,304	2,081
Professional services	2,247	1,744	6,888	4,533
FDIC premiums and assessments	1,651	1,208	4,537	3,644
Other real estate owned and foreclosures	(23)	46	35	702
Amortization of intangible assets	739	749	2,310	2,355
Acquisition, restructuring, and other expenses	1,420	2,170	16,005	3,828
Other	5,104	4,585	16,246	14,099
Total non-interest expense	65,820	48,844	209,669	142,212
Income before income taxes	30,114	23,334	80,267	66,761
Income tax expense	7,211	6,953	22,210	18,422
Net income	$ 22,903	$ 16,381	$ 58,057	$ 48,339
Earnings per share:
Basic (in dollars per share)	$ 0.57	$ 0.53	$ 1.55	$ 1.58
Diluted (in dollars per share)	$ 0.57	$ 0.53	$ 1.54	$ 1.57
Weighted average common shares outstanding:
Basic (in shares)	39,984	30,621	37,547	30,584
Diluted (in shares)	40,145	30,811	37,708	30,757

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 22,903	$ 16,381	$ 58,057	$ 48,339
Other comprehensive income, before tax:
Changes in unrealized gain on securities available-for-sale	1,461	(5,654)	(4,044)	21,639
Changes in unrealized gains and losses on derivative hedges	0	2,730	6,573	(2,660)
Income taxes related to other comprehensive income:
Changes in unrealized gain on securities available-for-sale	(605)	2,218	1,481	(8,330)
Changes in unrealized gains and losses on derivative hedges	0	(1,096)	(2,589)	1,067
Total other comprehensive income/(loss)	856	(1,802)	1,421	11,716
Total comprehensive income	$ 23,759	$ 14,579	$ 59,478	$ 60,055

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands		Total	44 Business Capital	Common stock	Common stock44 Business Capital	Additional paid-in capital	Unearned compensation	Retained earnings	Accumulated other comprehensive (loss) income	Treasury stock	Treasury stock44 Business Capital
Balance (in shares) at Dec. 31, 2015				30,974
Balance at Beginning of Period at Dec. 31, 2015		$ 887,189		$ 322		$ 742,619	$ (6,997)	$ 183,885	$ (3,305)	$ (29,335)
Comprehensive income:
Net income		48,339						48,339
Other comprehensive income		11,716							11,716
Total comprehensive income		60,055						48,339	11,716
Acquisition of 44 Business Capital (in shares)					45
Acquisition of 44 Business Capital			$ 1,217								$ 1,217
Cash dividends declared		(18,675)						(18,675)
Treasury stock adjustment	[1]	0				4,632				(4,632)
Forfeited shares (in shares)				(63)
Forfeited shares		0				106	1,592			(1,698)
Exercise of stock options (in shares)				9
Exercise of stock options		142						(96)		238
Restricted stock grants (in shares)				185
Restricted stock grants		0				504	(5,052)			4,548
Stock-based compensation		3,466					3,466
Net tax benefit related to stock-based compensation		(1)				(1)
Other, net (in shares)				(28)
Other, net		(800)				(16)				(784)
Balance (in shares) at Sep. 30, 2016				31,122
Balance at End of Period at Sep. 30, 2016		932,593		$ 322		747,844	(6,991)	213,453	8,411	(30,446)
Balance at Beginning of Period at Jun. 30, 2016									10,213
Comprehensive income:
Net income		16,381
Other comprehensive income		(1,802)
Total comprehensive income		14,579
Balance (in shares) at Sep. 30, 2016				31,122
Balance at End of Period at Sep. 30, 2016		932,593		$ 322		747,844	(6,991)	213,453	8,411	(30,446)
Balance (in shares) at Dec. 31, 2016				35,673
Balance at Beginning of Period at Dec. 31, 2016		1,093,298		$ 366		898,989	(6,374)	217,494	9,766	(26,943)
Comprehensive income:
Net income		58,057						58,057
Other comprehensive income		1,421							1,421
Total comprehensive income		59,478						58,057	1,421
Common stock issued (in shares)				4,638
Common stock issued		152,925		$ 46		152,879
Cash dividends declared		(23,515)						(23,515)
Forfeited shares (in shares)				(10)
Forfeited shares		0				63	304			(367)
Exercise of stock options (in shares)				11
Exercise of stock options		161						(132)		293
Restricted stock grants (in shares)				156
Restricted stock grants		0				1,582	(5,565)			3,983
Stock-based compensation		3,865					3,865
Other, net (in shares)				(44)
Other, net		(1,685)				(4)		(69)		(1,612)
Balance (in shares) at Sep. 30, 2017				40,424
Balance at End of Period at Sep. 30, 2017		1,284,527		$ 412		1,053,509	(7,770)	251,835	11,187	(24,646)
Balance at Beginning of Period at Jun. 30, 2017									10,331
Comprehensive income:
Net income		22,903
Other comprehensive income		856
Total comprehensive income		23,759
Balance (in shares) at Sep. 30, 2017				40,424
Balance at End of Period at Sep. 30, 2017		$ 1,284,527		$ 412		$ 1,053,509	$ (7,770)	$ 251,835	$ 11,187	$ (24,646)
[1]	Treasury stock adjustment represents the extinguishment of 168,931 shares of Berkshire Hills common stock held by the Company's subsidiary.

CONSOLIDATED STATEMENTS OF CHA7

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Statement of Stockholders' Equity [Abstract]
Treasury stock purchased (in shares)		168,931
Cash dividends declared (in dollars per share)	$ 0.63	$ 0.60

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net income	$ 58,057	$ 48,339
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	14,884	13,262
Net amortization of securities	2,103	3,476
Change in unamortized net loan costs and premiums	1,388	(3,825)
Premises and equipment depreciation and amortization expense	7,448	6,226
Stock-based compensation expense	3,865	3,466
Accretion of purchase accounting entries, net	(11,837)	(7,266)
Amortization of other intangibles	2,310	2,355
Write down of other real estate owned	10	395
Excess tax loss from stock-based payment arrangements	0	(105)
Income from cash surrender value of bank-owned life insurance policies	(2,343)	(2,905)
Gain on sales of securities, net	(12,568)	(101)
Net decrease (increase) in loans held for sale	(23,072)	(7,280)
Loss on disposition of assets	912	32
(Gain) loss on sale of real estate	(54)	62
Amortization of interest in tax-advantaged projects	6,129	4,454
Net change in other	8,845	(1,089)
Net cash provided by operating activities	56,077	59,496
Cash flows from investing activities:
Net decrease in trading security	468	446
Proceeds from sales of securities available for sale	57,308	283,755
Proceeds from maturities, calls and prepayments of securities available for sale	139,434	128,566
Purchases of securities available for sale	(323,292)	(186,392)
Proceeds from maturities, calls and prepayments of securities held to maturity	8,094	5,946
Purchases of securities held to maturity	(70,153)	(5,969)
Net change in loans	(330,869)	(284,440)
Purchases of bank owned life insurance	(20,000)	0
Proceeds from surrender of bank-owned life insurance	310	258
Proceeds from sale of Federal Home Loan Bank stock	72,820	18,544
Purchase of Federal Home Loan Bank stock	(76,646)	(8,803)
Net investment in limited partnership tax credits	(4,742)	(5,189)
Proceeds from the sale of premises and equipment	0	226
Purchase of premises and equipment, net	(9,740)	(4,314)
Acquisitions, net of cash (paid) acquired	0	(55,542)
Payment to terminate cash flow hedges	6,573	0
Proceeds from sale of other real estate	352	1,483
Net cash (used) by investing activities	(550,083)	(111,425)
Cash flows from financing activities:
Net increase in deposits	170,381	161,114
Proceeds from Federal Home Loan Bank advances and other borrowings	5,291,601	7,264,120
Repayments of Federal Home Loan Bank advances and other borrowings	(5,116,876)	(7,389,048)
Exercise of stock options	161	141
Common stock cash dividends paid	(23,515)	(18,675)
Common stock issued, net	152,925	0
Acquisition contingent consideration paid	(1,700)	0
Net cash provided by financing activities	472,977	17,652
Net change in cash and cash equivalents	(21,029)	(34,277)
Cash and cash equivalents at beginning of period	113,075	103,562
Cash and cash equivalents at end of period	92,046	69,285
Supplemental cash flow information:
Interest paid on deposits	29,822	21,954
Interest paid on borrowed funds	15,775	12,166
Income taxes paid, net	9,467	10,995
Acquisition of non-cash assets and liabilities:
Assets acquired	0	56,976
Liabilities assumed	0	(109)
Other non-cash changes:
Other net comprehensive income	1,421	11,716
Real estate owned acquired in settlement of loans	$ 444	$ 295

BASIS OF PRESENTATION

BASIS OF PRESENTATION	9 Months Ended
	Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
BASIS OF PRESENTATION	BASIS OF PRESENTATION The consolidated financial statements (the “financial statements”) of Berkshire Hills Bancorp, Inc. and its subsidiaries (the “Company” or “Berkshire”) have been prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”). The Company is a Delaware corporation and the holding company for Berkshire Bank (the “Bank”), a Massachusetts-chartered trust company headquartered in Pittsfield, Massachusetts, and Berkshire Insurance Group, Inc. These financial statements include the accounts of the Company, its wholly-owned subsidiaries and the Bank’s consolidated subsidiaries. In consolidation, all significant intercompany accounts and transactions are eliminated. All material wholly-owned and majority-owned subsidiaries are consolidated unless GAAP requires otherwise. The Company has evaluated subsequent events for potential recognition and/or disclosure through the date these consolidated financial statements were issued. These interim financial statements have been prepared in accordance with the instructions to Form 10-Q and Article 10 of Regulation S-X, and accordingly, certain information and footnote disclosures normally included in financial statements prepared according to GAAP have been omitted. The results for any interim period are not necessarily indicative of results for the full year. These consolidated financial statements should be read in conjunction with the audited financial statements and note disclosures for Berkshire Hills Bancorp, Inc. previously filed with the Securities and Exchange Commission in the Company’s Annual Report on Form 10-K for the year ended December 31, 2016. In management’s opinion, all adjustment’s necessary for a fair statement are reflected in the interim periods presented. Reclassifications Certain items in prior financial statements have been reclassified to conform to the current presentation. Recently Adopted Accounting Principles Effective January 1, 2017, the following new accounting guidance was adopted by the Company: • ASU No. 2016-05, Effect of Derivative Contract Novations on Existing Hedge Accounting Relationships; • ASU No. 2016-06, Contingent Put and Call Options in Debt Instruments; • ASU No. 2016-07, Simplifying the Transition to the Equity Method of Accounting • ASU No. 2016-15, Classification of Certain Cash Receipts and Cash Payments; and • ASU No. 2017-08, Premium Amortization on Purchased Callable Debt Securities The adoption of these accounting standards did not have a material impact on the Company's financial statements. Future Application of Accounting Pronouncements In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers.” This ASU 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. ASU 2014-09 is 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, ASU No. 2015-14, “Deferral of the Effective Date” was issued and delayed the effective date of ASU 2014-09 to annual and interim periods in fiscal years beginning after December 15, 2017. While the assessment of the provisions of ASU No. 2014-09 is not complete, the timing of the Company’s revenue recognition is not expected to materially change. This ASU impacts the Company’s wealth management services, administrative services for customer deposit accounts, interchange fees, and sale of owned real estate properties. The extent of this ASU on these revenue lines is being evaluated by the Company. The Company intends to adopt the ASU for the first quarter of 2018. Adoption is not anticipated to have a material impact on the Company’s financial statements. In January 2016, the FASB issued ASU No. 2016-01, “Recognition and Measurement of Financial Assets and Financial Liabilities.” This ASU requires an entity to: i) measure equity investments at fair value through net income, with certain exceptions; (ii) present in other comprehensive income the changes in instrument-specific credit risk for financial liabilities measured using the fair value option; (iii) present financial assets and financial liabilities by measurement category and form of financial asset; (iv) calculate the fair value of financial instruments for disclosure purposes based on an exit price and; (v) assess a valuation allowance on deferred tax assets related to unrealized losses of available-for-sale debt securities in combination with other deferred tax assets. The guidance provides an election to subsequently measure certain non-marketable equity investments at cost less any impairment and adjusted for certain observable price changes. The guidance also requires a qualitative impairment assessment of such equity investments and amends certain fair value disclosure requirements. The guidance is effective for annual periods beginning after December 15, 2017. Early adoption is only permitted for the provision related to instrument specific credit risk. While the Company has performed a preliminary evaluation of the provisions of ASU No. 2016-01, the effect of the adoption will depend on the Company’s portfolio at the time of transition. In February 2016, the FASB issued ASU No. 2016-02, “Leases”. The new pronouncement improves the transparency and comparability of financial reporting around leasing transactions and more closely aligns accounting for leases with the recently issued International Financial Reporting Standard. The pronouncement affects all entities that are participants to leasing agreements. From a lessee accounting perspective, the ASU requires a lessee to recognize assets and liabilities on the balance sheet for operating leases and changes many key definitions, including the definition of a lease. The ASU includes a short-term lease exception for leases with a term of twelve months or less, in which a lessee can make an accounting policy election not to recognize lease assets and lease liabilities. Lessees will continue to differentiate between finance leases (previously referred to as capital leases) and operating leases, using classification criteria that are substantially similar to the previous guidance. For lessees, the recognition, measurement, and presentation of expenses and cash flows arising from a lease have not significantly changed from previous GAAP. From a lessor accounting perspective, the guidance is largely unchanged, except for targeted improvements to align with new terminology under lessee accounting and with the updated revenue recognition guidance in Topic 606. For sale-leaseback transactions, for a sale to occur the transfer must meet the sale criteria under the new revenue standard, ASC 606. Entities will not be required to reassess transactions previously accounted under then existing guidance. Additionally, the ASU includes additional quantitative and qualitative disclosures required by lessees and lessors to help users better understand the amount, timing, and uncertainty of cash flows arising from leases. ASU No. 2016-02 is effective for fiscal years beginning after December 31, 2018, and interim periods within those fiscal years. Lessees and lessors are required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. The modified retrospective approach includes a number of optional practical expedients that entities may elect to apply as well as transition guidance specific to nonstandard leasing transactions. The Company is currently evaluating the provisions of ASU No. 2016-02 to determine the potential impact the new standard will have on the Company's consolidated financial statements. It is expected that assets and liabilities will increase based on the present value of remaining lease payments for leases in place at the adoption date; however, this is not expected to be material to the Company's results of operations or financial position. The Company continues to evaluate the extent of potential impact the new guidance will have on the Company’s consolidated financial statements. In June 2016, the FASB issued ASU No. 2016-13, “Measurement of Credit Losses on Financial Instruments.” This ASU improves financial reporting by requiring timelier recording of credit losses on loans and other financial instruments. The ASU requires companies to measure all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. Forward-looking information will now be used in credit loss estimates. The ASU requires enhanced disclosures to provide better understanding surrounding significant estimates and judgments used in estimating credit losses, as well as the credit quality and underwriting standards of a company’s portfolio. These disclosures include qualitative and quantitative requirements that provide additional information about the amounts recorded in the financial statements. Additionally, the ASU amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. Most debt instruments will require a cumulative-effect adjustment to retained earnings on the statement of financial position as of the beginning of the first reporting period in which the guidance is adopted (modified retrospective approach). However, there is instrument-specific transition guidance. ASU No. 2016-13 is effective for interim and annual periods beginning after December 15, 2019. Early application will be permitted for interim and annual periods beginning after December 15, 2018. The Company is evaluating the provisions of ASU No. 2016-13, and will closely monitor developments and additional guidance to determine the potential impact on the Company's consolidated financial statements. The Company expects the primary changes to be the application of the expected credit loss model to the financial statements. In addition, the Company expects the guidance to change the presentation of credit losses within the available-for-sale fixed maturities portfolio through an allowance method rather than as a direct write-down. The expected credit loss model will require a financial asset to be presented at the net amount expected to be collected. The allowance method for available-for-sale debt securities will allow the Company to record reversals of credit losses if the estimate of credit losses declines. The Company is in the process of identifying and implementing required changes to loan loss estimation models and processes and evaluating the impact of this new accounting guidance, which at the date of adoption is expected to increase the allowance for credit losses with a resulting negative adjustment to retained earnings. In August 2017, the FASB issued ASU No. 2017-12, “Derivatives and Hedging: Targeted Improvements to Accounting for Hedging Activities.” The purpose of this updated guidance is to better align a company’s financial reporting for hedging activities with the economic objectives of those activities. ASU No. 2017-12 is effective for public business entities for fiscal years beginning after December 15, 2018, with early adoption, including adoption in an interim period, permitted. ASU 2017-12 requires a modified retrospective transition method in which the Company will recognize the cumulative effect of the change on the opening balance of each affected component of equity in the consolidated balance sheet as of the date of adoption. While the Company continues to assess all potential impacts of the standard, we currently expect adoption to have an immaterial impact on our consolidated financial statements.

TRADING SECURITY

TRADING SECURITY	9 Months Ended
	Sep. 30, 2017
Trading Securities [Abstract]
TRADING SECURITY	TRADING SECURITY The Company holds a tax advantaged economic development bond accounted for at fair value. The security had an amortized cost of $10.9 million and $11.4 million , and a fair value of $12.6 million and $13.2 million , at September 30, 2017 and December 31, 2016 , respectively. As discussed further in Note 11 - Derivative Financial Instruments and Hedging Activities, the Company entered into a swap contract to swap-out the fixed rate of the security in exchange for a variable rate. The Company does not purchase securities with the intent of selling them in the near term, and there were no other securities in the trading portfolio at September 30, 2017 .

SECURITIES AVAILABLE FOR SALE A

SECURITIES AVAILABLE FOR SALE AND HELD TO MATURITY	9 Months Ended
	Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract]
SECURITIES AVAILABLE FOR SALE AND HELD TO MATURITY	SECURITIES AVAILABLE FOR SALE AND HELD TO MATURITY The following is a summary of securities available for sale and held to maturity: (In thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value September 30, 2017 Securities available for sale Debt securities: Municipal bonds and obligations $ 114,365 $ 4,828 $ (433 ) $ 118,760 Agency collateralized mortgage obligations 807,772 2,538 (2,874 ) 807,436 Agency mortgage-backed securities 217,626 911 (1,470 ) 217,067 Agency commercial mortgage-backed securities 64,296 126 (1,378 ) 63,044 Corporate bonds 66,321 1,059 (146 ) 67,234 Trust preferred securities 11,350 442 — 11,792 Other bonds and obligations 10,095 204 (8 ) 10,291 Total debt securities 1,291,825 10,108 (6,309 ) 1,295,624 Marketable equity securities 36,054 9,645 (310 ) 45,389 Total securities available for sale 1,327,879 19,753 (6,619 ) 1,341,013 Securities held to maturity Municipal bonds and obligations 268,990 6,196 (1,300 ) 273,886 Agency collateralized mortgage obligations 74,277 1,679 (356 ) 75,600 Agency mortgage-backed securities 8,080 — (142 ) 7,938 Agency commercial mortgage-backed securities 10,497 — (180 ) 10,317 Tax advantaged economic development bonds 32,899 1,837 — 34,736 Other bonds and obligations 322 — — 322 Total securities held to maturity 395,065 9,712 (1,978 ) 402,799 Total $ 1,722,944 $ 29,465 $ (8,597 ) $ 1,743,812 December 31, 2016 Securities available for sale Debt securities: Municipal bonds and obligations $ 117,910 $ 2,955 $ (1,049 ) $ 119,816 Agency collateralized mortgage obligations 652,680 2,522 (3,291 ) 651,911 Agency mortgage-backed securities 230,308 557 (2,181 ) 228,684 Agency commercial mortgage-backed securities 65,673 229 (1,368 ) 64,534 Corporate bonds 56,320 408 (722 ) 56,006 Trust preferred securities 11,578 368 (59 ) 11,887 Other bonds and obligations 10,979 195 (16 ) 11,158 Total debt securities 1,145,448 7,234 (8,686 ) 1,143,996 Marketable equity securities 47,858 19,296 (1,613 ) 65,541 Total securities available for sale 1,193,306 26,530 (10,299 ) 1,209,537 Securities held to maturity Municipal bonds and obligations 203,463 3,939 (2,416 ) 204,986 Agency collateralized mortgage obligations 75,655 1,281 (411 ) 76,525 Agency mortgage-backed securities 9,102 — (243 ) 8,859 Agency commercial mortgage-backed securities 10,545 — (434 ) 10,111 Tax advantaged economic development bonds 35,278 1,596 — 36,874 Other bonds and obligations 325 — — 325 Total securities held to maturity 334,368 6,816 (3,504 ) 337,680 Total $ 1,527,674 $ 33,346 $ (13,803 ) $ 1,547,217 The amortized cost and estimated fair value of available for sale (“AFS”) and held to maturity (“HTM”) securities, segregated by contractual maturity at September 30, 2017 are presented below. Expected maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations. Mortgage-backed securities are shown in total, as their maturities are highly variable. Equity securities have no maturity and are also shown in total. Available for sale Held to maturity Amortized Fair Amortized Fair (In thousands) Cost Value Cost Value Within 1 year $ 623 $ 626 $ 2,640 $ 2,642 Over 1 year to 5 years 31,653 32,254 26,324 27,305 Over 5 years to 10 years 56,336 57,943 8,467 8,925 Over 10 years 113,519 117,254 264,780 270,072 Total bonds and obligations 202,131 208,077 302,211 308,944 Marketable equity securities 36,054 45,389 — — Mortgage-backed securities 1,089,694 1,087,547 92,854 93,855 Total $ 1,327,879 $ 1,341,013 $ 395,065 $ 402,799 Securities with unrealized losses, segregated by the duration of their continuous unrealized loss positions, are summarized as follows: Less Than Twelve Months Over Twelve Months Total Gross Gross Gross Unrealized Fair Unrealized Fair Unrealized Fair (In thousands) Losses Value Losses Value Losses Value September 30, 2017 Securities available for sale Debt securities: Municipal bonds and obligations $ 52 $ 3,046 $ 381 $ 8,828 $ 433 $ 11,874 Agency collateralized mortgage obligations 2,547 466,132 327 15,320 2,874 481,452 Agency mortgage-backed securities 1,121 106,495 349 12,654 1,470 119,149 Agency commercial mortgage-backed securities 681 32,357 697 20,678 1,378 53,035 Corporate bonds — — 146 15,859 146 15,859 Other bonds and obligations 8 2,109 — — 8 2,109 Total debt securities 4,409 610,139 1,900 73,339 6,309 683,478 Marketable equity securities 310 4,950 — — 310 4,950 Total securities available for sale 4,719 615,089 1,900 73,339 6,619 688,428 Securities held to maturity Municipal bonds and obligations 856 64,187 444 12,362 1,300 76,549 Agency collateralized mortgage obligations 356 13,557 — — 356 13,557 Agency mortgage-backed securities 142 7,938 — — 142 7,938 Agency commercial mortgage-backed securities 180 10,317 — — 180 10,317 Total securities held to maturity 1,534 95,999 444 12,362 1,978 108,361 Total $ 6,253 $ 711,088 $ 2,344 $ 85,701 $ 8,597 $ 796,789 December 31, 2016 Securities available for sale Debt securities: Municipal bonds and obligations $ 1,049 $ 13,839 $ — $ — $ 1,049 $ 13,839 Agency collateralized mortgage obligations 3,291 319,448 — — 3,291 319,448 Agency mortgage-backed securities 2,153 130,766 28 2,061 2,181 132,827 Agency commercial mortgage-backed securities 1,368 44,860 — — 1,368 44,860 Corporate bonds 11 4,780 711 19,655 722 24,435 Trust preferred securities — — 59 1,204 59 1,204 Other bonds and obligations 15 3,014 1 27 16 3,041 Total debt securities 7,887 516,707 799 22,947 8,686 539,654 Marketable equity securities 157 6,600 1,456 5,927 1,613 12,527 Total securities available for sale 8,044 523,307 2,255 28,874 10,299 552,181 Securities held to maturity Municipal bonds and obligations 2,416 69,308 — — 2,416 69,308 Agency collateralized mortgage obligations 411 14,724 — — 411 14,724 Agency mortgage-backed securities 243 8,859 — — 243 8,859 Agency commercial mortgage-backed securities 434 10,111 — — 434 10,111 Total securities held to maturity 3,504 103,002 — — 3,504 103,002 Total $ 11,548 $ 626,309 $ 2,255 $ 28,874 $ 13,803 $ 655,183 Debt Securities The Company expects to recover its amortized cost basis on all debt securities in its AFS and HTM portfolios. Furthermore, the Company does not intend to sell nor does it anticipate that it will be required to sell any of its securities in an unrealized loss position as of September 30, 2017 , prior to this recovery. The Company’s ability and intent to hold these securities until recovery is supported by the Company’s strong capital and liquidity positions as well as its historically low portfolio turnover. The following summarizes, by investment security type, the basis for the conclusion that the debt securities in an unrealized loss position within the Company’s AFS and HTM portfolios were not other-than-temporarily impaired at September 30, 2017 : AFS municipal bonds and obligations At September 30, 2017, 7 of the total 263 securities in the Company’s portfolio of AFS municipal bonds and obligations were in unrealized loss positions. Aggregate unrealized losses represented 3.5% of the amortized cost of securities in unrealized loss positions. The Company continually monitors the municipal bond sector of the market carefully and periodically evaluates the appropriate level of exposure to the market. At this time, the Company feels the bonds in this portfolio carry minimal risk of default and the Company is appropriately compensated for that risk. There were no material underlying credit downgrades during the quarter. All securities are performing. AFS collateralized mortgage obligations At September 30, 2017 , 99 out of the total 241 securities in the Company’s portfolios of AFS collateralized mortgage obligations were in unrealized loss positions. Aggregate unrealized losses represented 0.6% of the amortized cost of securities in unrealized loss positions. The Federal National Mortgage Association (“FNMA”), Federal Home Loan Mortgage Corporation (“FHLMC”), and Government National Mortgage Association (“GNMA”) guarantee the contractual cash flows of all of the Company’s collateralized mortgage obligations. The securities are investment grade rated and there were no material underlying credit downgrades during the quarter. All securities are performing. AFS commercial and residential mortgage-backed securities At September 30, 2017 , 49 out of the total 103 securities in the Company’s portfolios of AFS mortgage-backed securities were in unrealized loss positions. Aggregate unrealized losses represented 1.6% of the amortized cost of securities in unrealized loss positions. The FNMA, FHLMC, and GNMA guarantee the contractual cash flows of all of the Company’s mortgage-backed securities. The securities are investment grade rated and there were no material underlying credit downgrades during the quarter. All securities are performing. AFS corporate bonds At September 30, 2017 , 1 out of 14 securities in the Company’s portfolio of AFS corporate bonds were in an unrealized loss position. The aggregate unrealized loss represents 0.9% of the amortized cost of bonds in unrealized loss positions. The Company reviews the financial strength of all of these bonds and has concluded that the amortized cost remains supported by the expected future cash flows of these securities. At September 30, 2017 , $146 thousand of the total unrealized losses was attributable to a $16.0 million investment. The Company evaluated this security, with a Level 2 fair value of $15.9 million , for potential other-than-temporary impairment (“OTTI”) at September 30, 2017 and determined that OTTI was not evident based on both the Company’s ability and intent to hold the security until the recovery of its remaining amortized cost. AFS other bonds and obligations At September 30, 2017 , 5 of the 9 securities in the Company’s portfolio of other bonds and obligations were in unrealized loss positions. Aggregate unrealized losses represented 0.4% of the amortized cost of securities in unrealized loss positions. The securities are all investment grade rated, and there were no material underlying credit downgrades during the quarter. All securities are performing. HTM Municipal bonds and obligations At September 30, 2017 , 52 of the 232 securities in the Company’s portfolio of other bonds and obligations were in unrealized loss positions. Aggregate unrealized losses represented 1.7% of the amortized cost of securities in unrealized loss positions. The securities are investment grade rated and there were no material underlying credit downgrades during the quarter. All securities are performing. HTM collateralized mortgage obligations At September 30, 2017 , 1 of the 9 securities in the Company’s portfolio of HTM collateralized mortgage obligations was in an unrealized loss position. Aggregate unrealized losses represented 1.8% of the amortized cost of securities in unrealized loss positions. The FNMA, FHLMC, and GNMA guarantee the contractual cash flows of all of the Company's collateralized residential mortgage obligations. The securities are investment grade rated, and there were no material underlying credit downgrades during the quarter. All securities are performing. HTM commercial and residential mortgage-backed securities At September 30, 2017 , 2 out of a total of 2 securities in the Company’s portfolio of HTM mortgage-backed securities were in unrealized loss positions. Aggregate unrealized losses represented 1.7% of the amortized cost of securities in unrealized loss positions. The FNMA, FHLMC, and GNMA guarantee the contractual cash flows of the Company’s residential mortgage-backed securities. The securities are investment grade rated and there were no material underlying credit downgrades during the quarter. All securities are performing. Marketable Equity Securities In evaluating its marketable equity securities portfolio for OTTI, the Company considers its ability to more likely than not hold an equity security to recovery. The Company additionally considers other various factors including the length of time and the extent to which the fair value has been less than cost and the financial condition and near term prospects of the issuer. Any OTTI is recognized immediately through earnings. At September 30, 2017 , 3 out of the total 19 securities in the Company’s portfolio of marketable equity securities were in an unrealized loss position. The unrealized loss represented 5.6% of the amortized cost of the securities. The Company has the ability and intent to hold the securities until recovery of their cost basis and does not consider the securities other-than-temporarily impaired at September 30, 2017 . As new information becomes available in future periods, changes to the Company’s assumptions may be warranted and could lead to a different conclusion regarding the OTTI of these securities.

LOANS

LOANS	9 Months Ended
	Sep. 30, 2017
Receivables [Abstract]
LOANS	LOANS The Company’s loan portfolio is segregated into the following segments: commercial real estate, commercial and industrial, residential mortgage, and consumer. Commercial real estate loans include construction, single and multi-family, and other commercial real estate classes. Residential mortgage loans include classes for 1-4 family owner occupied and construction loans. Consumer loans include home equity, direct and indirect auto, and other. These portfolio segments each have unique risk characteristics that are considered when determining the appropriate level for the allowance for loan losses. A substantial portion of the loan portfolio is secured by real estate in Massachusetts, southern Vermont, northeastern New York, New Jersey and in the Bank’s other New England lending areas. The ability of many of the Bank’s borrowers to honor their contracts is dependent, among other things, on the specific economy and real estate markets of these areas. Total loans include business activity loans and acquired loans. Acquired loans are those loans acquired from First Choice Bank, Parke Bank, Firestone Financial Corp., Hampden Bancorp, Inc., the New York branch acquisition, Beacon Federal Bancorp, Inc., The Connecticut Bank and Trust Company, Legacy Bancorp, Inc., and Rome Bancorp, Inc. Acquired loans that are refinanced are transferred to business activity loans. Business activity and acquired loans are serviced, managed, and accounted for under the Company's same control environment. The following is a summary of total loans: September 30, 2017 December 31, 2016 (In thousands) Business Acquired Total Business Acquired Total Commercial real estate: Construction $ 265,059 $ 18,490 $ 283,549 $ 253,302 $ 34,207 $ 287,509 Single and multi-family 342,426 84,668 427,094 191,819 125,672 317,491 Other commercial real estate 1,462,500 498,094 1,960,594 1,481,223 530,215 2,011,438 Total commercial real estate 2,069,985 601,252 2,671,237 1,926,344 690,094 2,616,438 Commercial and industrial loans: 1,154,988 99,959 1,254,947 908,102 153,936 1,062,038 Total commercial loans 3,224,973 701,211 3,926,184 2,834,446 844,030 3,678,476 Residential mortgages: 1-4 family 1,717,160 258,789 1,975,949 1,583,794 297,355 1,881,149 Construction 6,933 244 7,177 11,178 804 11,982 Total residential mortgages 1,724,093 259,033 1,983,126 1,594,972 298,159 1,893,131 Consumer loans: Home equity 290,144 95,746 385,890 313,521 80,279 393,800 Auto and other 601,905 50,301 652,206 478,368 106,012 584,380 Total consumer loans 892,049 146,047 1,038,096 791,889 186,291 978,180 Total loans $ 5,841,115 $ 1,106,291 $ 6,947,406 $ 5,221,307 $ 1,328,480 $ 6,549,787 The carrying amount of the acquired loans at September 30, 2017 totaled $1.1 billion . A subset of these loans was determined to have evidence of credit deterioration at acquisition date, which is accounted for in accordance with ASC 310-30. These purchased credit-impaired loans presently maintain a carrying value of $32.2 million (and a note balance of $56.8 million ). These loans are evaluated for impairment through the periodic reforecasting of expected cash flows. Loans considered not credit-impaired at acquisition date had a carrying amount of $1.1 billion . At December 31, 2016, acquired loans maintained a carrying value of $1.3 billion and purchased credit-impaired loans totaled $46.8 million (note balance of $86.6 million). Loans considered not credit-impaired at acquisition date had a carrying amount of $1.3 billion . The following table summarizes activity in the accretable yield for the acquired loan portfolio that falls under the purview of ASC 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality : Three Months Ended September 30, (In thousands) 2017 2016 Balance at beginning of period $ 5,767 $ 6,213 Acquisitions — — Reclassification from nonaccretable difference for loans with improved cash flows 10 688 Change in cash flows that do not affect nonaccretable difference — — Reclassification to TDR — — Accretion (1,712 ) (2,298 ) Balance at end of period $ 4,065 $ 4,603 Nine Months Ended September 30, (In thousands) 2017 2016 Balance at beginning of period $ 8,738 $ 6,925 Acquisitions — 708 Reclassification from nonaccretable difference for loans with improved cash flows 343 2,106 Change in cash flows that do not affect nonaccretable difference — — Reclassification to TDR — (185 ) Accretion (5,016 ) (4,951 ) Balance at end of period $ 4,065 $ 4,603 The following is a summary of past due loans at September 30, 2017 and December 31, 2016: Business Activities Loans (In thousands) 30-59 Days 60-89 Days 90 Total Past Current Total Loans Past Due > September 30, 2017 Commercial real estate: Construction $ — $ — $ — $ — $ 265,059 $ 265,059 $ — Single and multi-family 143 260 326 729 341,697 342,426 163 Other commercial real estate 307 — 4,369 4,676 1,457,824 1,462,500 — Total 450 260 4,695 5,405 2,064,580 2,069,985 163 Commercial and industrial loans: Total 1,370 640 8,483 10,493 1,144,495 1,154,988 32 Residential mortgages: 1-4 family 1,055 1,396 2,093 4,544 1,712,616 1,717,160 125 Construction — — — — 6,933 6,933 — Total 1,055 1,396 2,093 4,544 1,719,549 1,724,093 125 Consumer loans: Home equity 74 267 1,872 2,213 287,931 290,144 228 Auto and other 2,620 384 1,115 4,119 597,786 601,905 31 Total 2,694 651 2,987 6,332 885,717 892,049 259 Total $ 5,569 $ 2,947 $ 18,258 $ 26,774 $ 5,814,341 $ 5,841,115 $ 579 Business Activities Loans (In thousands) 30-59 Days 60-89 Days 90 Total Past Current Total Loans Past Due > December 31, 2016 Commercial real estate: Construction $ — $ — $ — $ — $ 253,302 $ 253,302 $ — Single and multi-family 618 110 624 1,352 190,467 191,819 155 Other commercial real estate 481 2,243 4,212 6,936 1,474,287 1,481,223 — Total 1,099 2,353 4,836 8,288 1,918,056 1,926,344 155 Commercial and industrial loans: Total 3,090 1,301 6,290 10,681 897,421 908,102 5 Residential mortgages: 1-4 family 1,393 701 4,179 6,273 1,577,521 1,583,794 1,956 Construction 10 — — 10 11,168 11,178 — Total 1,403 701 4,179 6,283 1,588,689 1,594,972 1,956 Consumer loans: Home equity 99 — 2,981 3,080 310,441 313,521 306 Auto and other 2,483 494 968 3,945 474,423 478,368 16 Total 2,582 494 3,949 7,025 784,864 791,889 322 Total $ 8,174 $ 4,849 $ 19,254 $ 32,277 $ 5,189,030 $ 5,221,307 $ 2,438 Acquired Loans (In thousands) 30-59 Days 60-89 Days 90 Total Past Acquired Total Loans Past Due > September 30, 2017 Commercial real estate: Construction $ 570 $ — $ — $ 570 $ — $ 18,490 $ — Single and multi-family 421 78 2,600 3,099 3,285 84,668 2,385 Other commercial real estate 1,633 145 481 2,259 18,962 498,094 — Total 2,624 223 3,081 5,928 22,247 601,252 2,385 Commercial and industrial loans: Total 634 52 1,284 1,970 1,497 99,959 54 Residential mortgages: 1-4 family 624 383 1,154 2,161 7,167 258,789 30 Construction — — — — — 244 — Total 624 383 1,154 2,161 7,167 259,033 30 Consumer loans: Home equity 23 2 1,220 1,245 930 95,746 — Auto and other 258 29 416 703 358 50,301 14 Total 281 31 1,636 1,948 1,288 146,047 14 Total $ 4,163 $ 689 $ 7,155 $ 12,007 $ 32,199 $ 1,106,291 $ 2,483 Acquired Loans (In thousands) 30-59 Days 60-89 Days 90 Total Past Acquired Total Loans Past Due > December 31, 2016 Commercial real estate: — Construction $ — $ — $ — $ — $ 47 $ 34,207 $ — Single and multi-family 2 — 437 439 4,726 125,672 — Other commercial real estate 1,555 — 765 2,320 30,047 530,215 — Total 1,557 — 1,202 2,759 34,820 690,094 — Commercial and industrial loans: Total 1,850 15 1,262 3,127 3,369 153,936 24 Residential mortgages: 1-4 family 321 343 2,015 2,679 7,283 297,355 443 Construction — — — — — 804 — Total 321 343 2,015 2,679 7,283 298,159 443 Consumer loans: Home equity 753 — 870 1,623 957 80,279 353 Auto and other 542 314 1,686 2,542 387 106,012 791 Total 1,295 314 2,556 4,165 1,344 186,291 1,144 Total $ 5,023 $ 672 $ 7,035 $ 12,730 $ 46,816 $ 1,328,480 $ 1,611 The following is summary information pertaining to non-accrual loans at September 30, 2017 and December 31, 2016: September 30, 2017 December 31, 2016 (In thousands) Business Acquired Total Business Acquired Total Commercial real estate: Construction $ — $ — $ — $ — $ — $ — Single and multi-family 163 215 378 469 437 906 Other commercial real estate 4,369 481 4,850 4,212 765 4,977 Total 4,532 696 5,228 4,681 1,202 5,883 Commercial and industrial loans: Total 8,451 1,147 9,598 6,285 1,155 7,440 Residential mortgages: 1-4 family 1,968 1,124 3,092 2,223 1,572 3,795 Construction — — — — — — Total 1,968 1,124 3,092 2,223 1,572 3,795 Consumer loans: Home equity 1,644 1,220 2,864 2,675 517 3,192 Auto and other 1,084 402 1,486 952 895 1,847 Total 2,728 1,622 4,350 3,627 1,412 5,039 Total non-accrual loans $ 17,679 $ 4,589 $ 22,268 $ 16,816 $ 5,341 $ 22,157 _______________________________________ (1) At quarter end September 30, 2017 , acquired credit impaired loans accounted for $83 thousand of loans greater than 90 days past due that are not presented in the above table. (2) At December 31, 2016, acquired credit impaired loans accounted for $83 thousand of loans greater than 90 days past due that are not presented in the above table. Loans evaluated for impairment as of September 30, 2017 and December 31, 2016 were as follows: Business Activities Loans (In thousands) Commercial Commercial and Residential Consumer Total September 30, 2017 Loans receivable: Balance at end of period Individually evaluated for impairment $ 34,064 $ 10,164 $ 2,205 $ 1,860 $ 48,293 Collectively evaluated for impairment 2,035,921 1,144,824 1,721,888 890,189 5,792,822 Total $ 2,069,985 $ 1,154,988 $ 1,724,093 $ 892,049 $ 5,841,115 Business Activities Loans (In thousands) Commercial Commercial and Residential Consumer Total December 31, 2016 Loans receivable: Balance at end of year Individually evaluated for impairment $ 25,549 $ 5,705 $ 2,775 $ 2,703 $ 36,732 Collectively evaluated for impairment 1,900,795 902,397 1,592,197 789,186 5,184,575 Total $ 1,926,344 $ 908,102 $ 1,594,972 $ 791,889 $ 5,221,307 Acquired Loans (In thousands) Commercial Commercial and Residential Consumer Total September 30, 2017 Loans receivable: Balance at end of Period Individually evaluated for impairment $ 2,770 $ 592 $ 475 $ 950 $ 4,787 Purchased credit-impaired loans 22,247 1,497 7,167 1,288 32,199 Collectively evaluated for impairment 576,235 97,870 251,391 143,809 1,069,305 Total $ 601,252 $ 99,959 $ 259,033 $ 146,047 $ 1,106,291 Acquired Loans (In thousands) Commercial Commercial and Residential Consumer Total December 31, 2016 Loans receivable: Balance at end of year Individually evaluated for impairment $ 4,256 $ 635 $ 308 $ 406 $ 5,605 Purchased credit-impaired loans 34,820 3,369 7,283 1,344 46,816 Collectively evaluated for impairment 651,018 149,932 290,568 184,541 1,276,059 Total $ 690,094 $ 153,936 $ 298,159 $ 186,291 $ 1,328,480 The following is a summary of impaired loans at September 30, 2017 and December 31, 2016: Business Activities Loans September 30, 2017 (In thousands) Recorded Investment Unpaid Principal Related Allowance With no related allowance: Commercial real estate - single and multifamily $ — $ — $ — Other commercial real estate loans 19,005 19,005 — Commercial and industrial loans 2,043 2,043 — Residential mortgages - 1-4 family 1,033 1,033 — Consumer - home equity 769 769 — Consumer - other — — — With an allowance recorded: Commercial real estate - single and multifamily $ 162 $ 163 $ 1 Other commercial real estate loans 14,758 14,896 138 Commercial and industrial loans 7,842 8,121 279 Residential mortgages - 1-4 family 1,036 1,172 136 Consumer - home equity 1,052 1,091 39 Consumer - other — — — Total Commercial real estate $ 33,925 $ 34,064 $ 139 Commercial and industrial loans 9,885 10,164 279 Residential mortgages 2,069 2,205 136 Consumer 1,821 1,860 39 Total impaired loans $ 47,700 $ 48,293 $ 593 Business Activities Loans December 31, 2016 (In thousands) Recorded Investment Unpaid Principal Related Allowance With no related allowance: Commercial real estate - single and multifamily $ — $ — $ — Other commercial real estate loans 18,905 18,905 — Commercial and industrial loans 382 382 — Residential mortgages - 1-4 family 2,101 2,101 — Consumer - home equity 1,605 1,605 — Consumer - other — — — With an allowance recorded: Commercial real estate - single and multifamily $ 179 $ 181 $ 2 Other commercial real estate loans 6,306 6,462 156 Commercial and industrial loans 5,060 5,324 264 Residential mortgages - 1-4 family 538 674 136 Consumer - home equity 942 1,098 156 Consumer - other — — — Total Commercial real estate $ 25,390 $ 25,548 $ 158 Commercial and industrial loans 5,442 5,706 264 Residential mortgages 2,639 2,775 136 Consumer 2,547 2,703 156 Total impaired loans $ 36,018 $ 36,732 $ 714 Acquired Loans September 30, 2017 (In thousands) Recorded Investment Unpaid Principal Related Allowance With no related allowance: Commercial real estate - single and multifamily $ 216 $ 216 $ — Other commercial real estate loans 195 195 — Commercial and industrial loans 287 287 — Residential mortgages - 1-4 family 165 165 — Consumer - home equity 581 581 — Consumer - other — — — With an allowance recorded: Commercial real estate - single and multifamily $ 871 $ 892 $ 21 Other commercial real estate loans 1,442 1,467 25 Commercial and industrial loans 303 305 2 Residential mortgages - 1-4 family 291 310 19 Consumer - home equity 325 369 44 Total x Commercial real estate $ 2,724 $ 2,770 $ 46 Commercial and industrial loans 590 592 2 Residential mortgages 456 475 19 Consumer 906 950 44 Total impaired loans $ 4,676 $ 4,787 $ 111 Acquired Loans December 31, 2016 (In thousands) Recorded Investment Unpaid Principal Related Allowance With no related allowance: Commercial real estate - single and multifamily $ — $ — $ — Other commercial real estate loans 547 547 — Commercial and industrial loans — — — Residential mortgages - 1-4 family 208 208 — With an allowance recorded: Commercial real estate - single and multifamily $ 1,250 $ 1,358 $ 108 Other commercial real estate loans 2,209 2,351 142 Commercial and industrial loans 576 635 59 Residential mortgages - 1-4 family 89 100 11 Consumer - home equity 292 406 114 Total Commercial real estate $ 4,006 $ 4,256 $ 250 Commercial and industrial loans 576 635 59 Residential mortgages 297 308 11 Consumer 292 406 114 Total impaired loans $ 5,171 $ 5,605 $ 434 The following is a summary of the average recorded investment and interest income recognized on impaired loans as of September 30, 2017 and 2016: Business Activities Loans Nine Months Ended September 30, 2017 Nine Months Ended September 30, 2016 (In thousands) Average Recorded Cash Basis Interest Average Recorded Cash Basis Interest With no related allowance: Commercial real estate - single and multifamily $ 84 $ — $ 48 $ 1 Other commercial real estate loans 21,132 934 2,624 111 Commercial and industrial loans 1,825 69 805 26 Residential mortgages - 1-4 family 1,391 29 2,309 51 Consumer - home equity 1,301 26 693 5 Consumer - other — — 1 — With an allowance recorded: Commercial real estate - single and multifamily $ 172 $ 10 $ — $ — Other commercial real estate loans 10,553 363 10,266 351 Commercial and industrial loans 6,493 354 4,609 154 Residential mortgages - 1-4 family 1,187 38 684 21 Consumer - home equity 1,094 32 999 26 Consumer - other — — 104 3 Total Commercial real estate $ 31,941 $ 1,307 $ 12,938 $ 463 Commercial and industrial loans 8,318 423 5,414 180 Residential mortgages 2,578 67 2,993 72 Consumer loans 2,395 58 1,797 34 Total impaired loans $ 45,232 $ 1,855 $ 23,142 $ 749 Acquired Loans Nine Months Ended September 30, 2017 Nine Months Ended September 30, 2016 (In thousands) Average Recorded Cash Basis Interest Average Recorded Cash Basis Interest With no related allowance: Commercial real estate - single and multifamily $ 424 $ 79 $ — $ — Other commercial real estate loans 483 73 546 20 Commercial and Industrial loans 319 4 191 1 Residential mortgages - 1-4 family 170 7 321 9 Consumer - home equity 567 — — — Consumer - other — — 140 1 With an allowance recorded: Commercial real estate - single and multifamily $ 904 $ 36 $ 942 $ 37 Other commercial real estate loans 1,481 56 2,606 127 Commercial and Industrial loans 332 29 404 10 Residential mortgages - 1-4 family 319 12 117 4 Consumer - home equity 387 13 356 13 Consumer - other — — — — Total Other commercial real estate loans $ 3,292 $ 244 $ 4,094 $ 184 Commercial and industrial loans 651 33 595 11 Residential mortgages 489 19 438 13 Consumer loans 954 13 496 14 Total impaired loans $ 5,386 $ 309 $ 5,623 $ 222 Troubled Debt Restructuring Loans The Company’s loan portfolio also includes certain loans that have been modified in a Troubled Debt Restructuring (TDR), where economic concessions have been granted to borrowers who have experienced or are expected to experience financial difficulties. These concessions typically result from the Company’s loss mitigation activities and could include reductions in the interest rate, payment extensions, forgiveness of principal, forbearance, or other actions. Certain TDRs are classified as nonperforming at the time of restructure and may only be returned to performing status after considering the borrower’s sustained repayment performance for a reasonable period, generally six months . TDRs are evaluated individually for impairment and may result in a specific allowance amount allocated to an individual loan. The following tables include the recorded investment and number of modifications identified during the three and nine months ended September 30, 2017 . The table includes the recorded investment in the loans prior to a modification and also the recorded investment in the loans after the loans were restructured. The modifications for the three and nine months ended September 30, 2017 and 2016 were attributable to interest rate concessions, principal concessions, maturity date extensions, modified payment terms, reamortization, and accelerated maturity. Three Months Ended September 30, 2017 (Dollars in thousands) Number of Pre-Modification Post-Modification Troubled Debt Restructurings Commercial - Other — — — Commercial and industrial 3 1,654 1,654 Residential - 1-4 Family — — — Consumer - Home Equity — — — Total 3 $ 1,654 $ 1,654 Nine Months Ended September 30, 2017 (Dollars in thousands) Number of Pre-Modification Post-Modification Troubled Debt Restructurings Commercial - Other 15 $ 13,445 $ 11,718 Commercial and industrial 8 3,471 3,471 Residential - 1-4 Family 2 205 188 Consumer - Home Equity 1 53 53 Total 26 $ 17,174 $ 15,430 Three Months Ended September 30, 2016 (Dollars in thousands) Number of Pre-Modification Post-Modification Troubled Debt Restructurings Commercial and industrial 2 404 404 Residential - 1-4 Family 2 5 5 Total 4 $ 409 $ 409 Nine Months Ended September 30, 2016 (Dollars in thousands) Number of Pre-Modification Post-Modification Troubled Debt Restructurings Commercial - Other 2 $ 1,049 $ 1,049 Commercial and industrial 4 555 555 Residential - 1-4 Family 2 5 5 Consumer - Home Equity 1 117 117 Total 9 $ 1,726 $ 1,726 The following table discloses the recorded investments and numbers of modifications for TDRs where a concession has been made, that then defaulted in the respective reporting period. For the three months ended September 30, 2017, there were no loans that were restructured that had subsequently defaulted during the period. For the nine months ended September 30, 2017, there were two loans that were restructured that had subsequently defaulted during the period. Modifications that Subsequently Defaulted Three Months Ended September 30, 2017 (Dollars in thousands) Number of Contracts Recorded Investment Troubled Debt Restructurings Commercial - Other — $ — Commercial and industrial — $ — Modifications that Subsequently Defaulted Nine Months Ended September 30, 2017 (Dollars in thousands) Number of Contracts Recorded Investment Troubled Debt Restructurings Commercial - Other 1 $ 113 Commercial and industrial 1 $ 101 The following table presents the Company’s TDR activity for the three and nine months ended September 30, 2017 and 2016: Three Months Ended September 30, (In thousands) 2017 2016 Balance at beginning of the period $ 44,556 $ 22,122 Principal payments (373 ) (932 ) TDR status change (1) — — Other reductions/increases (2) (1,939 ) — Newly identified TDRs 1,654 409 Balance at end of the period $ 43,898 $ 21,599 Nine Months Ended September 30, (In thousands) 2017 2016 Balance at beginning of the period $ 33,829 $ 22,048 Principal payments (1,527 ) (2,041 ) TDR status change (1) — 2,236 Other reductions/increases (2) (3,834 ) (2,370 ) Newly identified TDRs 15,430 1,726 Balance at end of the period $ 43,898 $ 21,599 _________________________________ (1) TDR status change classification represents TDR loans with a specified interest rate equal to or greater than the rate that the Company was willing to accept at the time of the restructuring for a new loan with comparable risk and the loan was on current payment status and not impaired based on the terms specified by the restructuring agreement. (2) Other reductions classification consists of transfer to other real estate owned and charge-offs and advances to loans. The evaluation of certain loans individually for specific impairment includes loans that were previously classified as TDRs or continue to be classified as TDRs. As of September 30, 2017 , the Company maintained foreclosed residential real estate property with a fair value of $288 thousand . Additionally, residential mortgage loans collateralized by real estate property that are in the process of foreclosure as of September 30, 2017 and December 31, 2016 totaled $4.7 million and $4.8 million , respectively. As of December 31, 2016, foreclosed residential real estate property totaled $151 thousand .

LOAN LOSS ALLOWANCE

LOAN LOSS ALLOWANCE	9 Months Ended
	Sep. 30, 2017
Receivables [Abstract]
LOAN LOSS ALLOWANCE	LOAN LOSS ALLOWANCE Activity in the allowance for loan losses for the three and nine months ended September 30, 2017 and 2016 was as follows: At or for the three months ended September 30, 2017 Business Activities Loans (In thousands) Commercial real estate Commercial and industrial loans Residential mortgages Consumer Total Balance at beginning of period $ 15,972 $ 12,588 $ 8,114 $ 6,221 $ 42,895 Charged-off loans 1,367 606 42 1,352 3,367 Recoveries on charged-off loans 14 37 241 39 331 Provision/(releases) for loan losses 1,210 1,952 241 1,473 4,876 Balance at end of period $ 15,829 $ 13,971 $ 8,554 $ 6,381 $ 44,735 Individually evaluated for impairment 139 279 136 39 593 Collectively evaluated for impairment 15,690 13,692 8,418 6,342 44,142 Total $ 15,829 $ 13,971 $ 8,554 $ 6,381 $ 44,735 At or for the nine months ended September 30, 2017 Business Activities Loans (In thousands) Commercial real estate Commercial and industrial loans Residential mortgages Consumer Total Balance at beginning of period $ 16,499 $ 9,446 $ 7,800 $ 5,484 $ 39,229 Charged-off loans 2,883 2,457 555 2,670 8,565 Recoveries on charged-off loans 71 108 270 211 660 Provision/(releases) for loan losses 2,142 6,874 1,039 3,356 13,411 Balance at end of period $ 15,829 $ 13,971 $ 8,554 $ 6,381 $ 44,735 Individually evaluated for impairment 139 279 136 39 593 Collectively evaluated for impairment 15,690 13,692 8,418 6,342 44,142 Total $ 15,829 $ 13,971 $ 8,554 $ 6,381 $ 44,735 At or for the three months ended September 30, 2016 Business Activities Loans (In thousands) Commercial real estate Commercial and industrial loans Residential mortgages Consumer Total Balance at beginning of period $ 16,732 $ 8,216 $ 7,453 $ 4,723 $ 37,124 Charged-off loans — 1,599 253 434 2,286 Recoveries on charged-off loans 114 37 96 61 308 Provision/(releases) for loan losses 620 1,831 88 936 3,475 Balance at end of period $ 17,466 $ 8,485 $ 7,384 $ 5,286 $ 38,621 Individually evaluated for impairment 190 194 89 165 638 Collectively evaluated for impairment 17,276 8,291 7,295 5,121 37,983 Total $ 17,466 $ 8,485 $ 7,384 $ 5,286 $ 38,621 At or for the nine months ended September 30, 2016 Business Activities Loans (In thousands) Commercial real estate Commercial and industrial loans Residential mortgages Consumer Total Balance at beginning of period $ 14,610 $ 7,367 $ 7,612 $ 4,985 $ 34,574 Charged-off loans 1,578 4,145 1,340 1,175 8,238 Recoveries on charged-off loans 242 114 101 183 640 Provision/(releases) for loan losses 4,192 5,149 1,011 1,293 11,645 Balance at end of period $ 17,466 $ 8,485 $ 7,384 $ 5,286 $ 38,621 Individually evaluated for impairment 190 194 89 165 638 Collectively evaluated for impairment 17,276 8,291 7,295 5,121 37,983 Total $ 17,466 $ 8,485 $ 7,384 $ 5,286 $ 38,621 At or for the three months ended September 30, 2017 Acquired Loans (In thousands) Commercial real estate Commercial and industrial loans Residential mortgages Consumer Total Balance at beginning of period $ 2,356 $ 1,014 $ 690 $ 404 $ 4,464 Charged-off loans 95 153 70 111 429 Recoveries on charged-off loans 22 150 1 37 210 Provision for loan losses 109 (149 ) 49 15 24 Balance at end of period $ 2,392 $ 862 $ 670 $ 345 $ 4,269 Individually evaluated for impairment 46 2 19 44 111 Purchased credit-impaired loans — — — — — Collectively evaluated for impairment 2,346 860 651 301 4,158 Total $ 2,392 $ 862 $ 670 $ 345 $ 4,269 At or for the nine months ended September 30, 2017 Acquired Loans (In thousands) Commercial real estate Commercial and industrial loans Residential mortgages Consumer Total Balance at beginning of period $ 2,303 $ 1,164 $ 766 $ 536 $ 4,769 Charged-off loans 765 634 285 601 2,285 Recoveries on charged-off loans 44 151 39 78 312 Provision for loan losses 810 181 150 332 1,473 Balance at end of period $ 2,392 $ 862 $ 670 $ 345 $ 4,269 Individually evaluated for impairment 46 2 19 44 111 Purchased credit-impaired loans — — — — — Collectively evaluated for impairment 2,346 860 651 301 4,158 Total $ 2,392 $ 862 $ 670 $ 345 $ 4,269 At or for the three months ended September 30, 2016 Acquired Loans (In thousands) Commercial real estate Commercial and industrial loans Residential mortgages Consumer Total Balance at beginning of period $ 2,140 $ 776 $ 881 $ 476 $ 4,273 Charged-off loans 662 84 332 77 1,155 Recoveries on charged-off loans — 37 37 33 107 Provision for loan losses 907 210 111 31 1,259 Balance at end of period $ 2,385 $ 939 $ 697 $ 463 $ 4,484 Individually evaluated for impairment 704 121 12 135 972 Purchased credit-impaired loans — — — — — Collectively evaluated for impairment 1,681 818 685 328 3,512 Total $ 2,385 $ 939 $ 697 $ 463 $ 4,484 At or for the nine months ended September 30, 2016 Acquired Loans (In thousands) Commercial real estate Commercial and industrial loans Residential mortgages Consumer Total Balance at beginning of period $ 1,903 $ 1,330 $ 976 $ 525 $ 4,734 Charged-off loans 788 359 696 457 2,300 Recoveries on charged-off loans — 213 141 79 433 Provision for loan losses 1,270 (245 ) 276 316 1,617 Balance at end of period $ 2,385 $ 939 $ 697 $ 463 $ 4,484 Individually evaluated for impairment 704 121 12 135 972 Purchased credit-impaired loans — — — — — Collectively evaluated for impairment 1,681 818 685 328 3,512 Total $ 2,385 $ 939 $ 697 $ 463 $ 4,484 Credit Quality Information Business Activities Loans Credit Quality Analysis The Company monitors the credit quality of its portfolio by using internal risk ratings that are based on regulatory guidance. Loans that are given a Pass rating are not considered a problem credit. Loans that are classified as Special Mention loans are considered to have potential credit problems and are evaluated closely by management. Substandard and non-accruing loans are loans for which a definitive weakness has been identified and which may make full collection of contractual cash flows questionable. Doubtful loans are those with identified weaknesses that make full collection of contractual cash flows, on the basis of currently existing facts, conditions, and values, highly questionable and improbable. For commercial credits, the Company assigns an internal risk rating at origination and reviews the rating annually, semiannually or quarterly depending on the risk rating. The rating is also reassessed at any point in time when management becomes aware of information that may affect the borrower’s ability to fulfill their obligations. The Company risk rates its residential mortgages, including 1-4 family and residential construction loans, based on a three rating system: Pass, Special Mention and Substandard. Loans that are current within 59 days are rated Pass. Residential mortgages that are 60 - 89 days delinquent are rated Special Mention. Loans delinquent for 90 days or greater are rated Substandard and generally placed on non-accrual status. Home equity loans are risk rated based on the same rating system as the Company’s residential mortgages. Ratings for other consumer loans, including auto loans, are based on a two rating system. Loans that are current within 119 days are rated Performing while loans delinquent for 120 days or more are rated Non-performing. Other consumer loans are placed on non-accrual at such time as they become Non-performing. Acquired Loans Credit Quality Analysis Upon acquiring a loan portfolio, the Company's internal loan review function assigns risk ratings to the acquired loans, utilizing the same methodology as it does with business activities loans. This may differ from the risk rating policy of the predecessor bank. Loans which are rated Substandard or worse according to the rating process outlined below are deemed to be credit impaired loans accounted for under ASC 310-30, regardless of whether they are classified as performing or non-performing. The Bank utilizes an eleven grade internal loan rating system for each of its acquired commercial real estate, construction and commercial loans as outlined in the Credit Quality Information section of this Note. The ratings system is similar to loans originated through business activities. The Company subjects loans that do not meet the ASC 310-30 criteria to ASC 450-20 ( Loss Contingencies ) by collectively evaluating these loans for an allowance for loan loss. The Company applies a methodology similar to the methodology prescribed for business activities loans, which includes the application of environmental factors to each category of loans. The methodology to collectively evaluate the acquired loans outside the scope of ASC 310-30 includes the application of a number of environmental factors that reflect management’s best estimate of the level of incremental credit losses that might be recognized given current conditions. This is reviewed as part of the allowance for loan loss adequacy analysis. As the loan portfolio matures and environmental factors change, the loan portfolio will be reassessed each quarter to determine an appropriate reserve allowance. Additionally, the Company considers the need for a reserve for acquired loans accounted for outside of the scope of ASC 310-30 under ASC 310-20. At acquisition date, the Bank determined a fair value mark with credit and interest rate components. Under the Company’s model, the impairment evaluation process involves comparing the carrying value of acquired loans, including the entire unamortized premium or discount, to the calculated reserve allowance. If necessary, the Company books a reserve to account for shortfalls identified through this calculation. Fair value marks are not bifurcated when evaluating for impairment. A decrease in the expected cash flows in subsequent periods requires the establishment of an allowance for loan losses at that time for ASC 310-30 loans. At September 30, 2017 , the allowance for loan losses related to acquired loans under ASC 310-30 and ASC 310-20 was $4.3 million using the above mentioned criteria. The following tables present the Company’s loans by risk rating at September 30, 2017 and December 31, 2016: Business Activities Loans Commercial Real Estate Credit Risk Profile by Creditworthiness Category Construction Single and multi-family Other Total commercial real estate (In thousands) September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 Grade: Pass $ 265,059 $ 253,302 $ 339,846 $ 189,310 $ 1,419,153 $ 1,434,762 $ 2,024,058 $ 1,877,374 Special mention — — 529 334 12,604 5,827 13,133 6,161 Substandard — — 2,051 2,175 30,743 40,598 32,794 42,773 Doubtful — — — — — 36 — 36 Total $ 265,059 $ 253,302 $ 342,426 $ 191,819 $ 1,462,500 $ 1,481,223 $ 2,069,985 $ 1,926,344 Commercial and Industrial Loans Credit Risk Profile by Creditworthiness Category Total comm. and industrial loans (In thousands) September 30, 2017 December 31, 2016 Grade: Pass $ 1,136,498 $ 890,974 Special mention 2,522 123 Substandard 12,981 13,825 Doubtful 2,987 3,180 Total $ 1,154,988 $ 908,102 Residential Mortgages Credit Risk Profile by Internally Assigned Grade 1-4 family Construction Total residential mortgages (In thousands) September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 Grade: Pass $ 1,713,671 $ 1,578,913 $ 6,933 $ 11,178 $ 1,720,604 $ 1,590,091 Special mention 1,396 701 — — 1,396 701 Substandard 2,093 4,179 — — 2,093 4,179 Total $ 1,717,160 $ 1,583,793 $ 6,933 $ 11,178 $ 1,724,093 $ 1,594,971 Consumer Loans Credit Risk Profile Based on Payment Activity Home equity Auto and other Total consumer loans (In thousands) September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 Performing $ 288,500 $ 310,846 $ 600,821 $ 477,416 $ 889,321 $ 788,262 Nonperforming 1,644 2,675 1,084 952 2,728 3,627 Total $ 290,144 $ 313,521 $ 601,905 $ 478,368 $ 892,049 $ 791,889 Acquired Loans Commercial Real Estate Credit Risk Profile by Creditworthiness Category Construction Single and multi-family Other Total commercial real estate (In thousands) September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 Grade: Pass $ 17,221 $ 33,461 $ 81,935 $ 119,414 $ 454,081 $ 496,562 $ 553,237 $ 649,437 Special mention 570 — 607 907 18,626 1,622 19,803 2,529 Substandard 699 746 2,126 5,351 25,387 32,031 28,212 38,128 Total $ 18,490 $ 34,207 $ 84,668 $ 125,672 $ 498,094 $ 530,215 $ 601,252 $ 690,094 Commercial and Industrial Loans Credit Risk Profile by Creditworthiness Category Total comm. and industrial loans (In thousands) September 30, 2017 December 31, 2016 Grade: Pass $ 95,098 $ 147,102 Special mention 51 1,260 Substandard 4,810 5,574 Total $ 99,959 $ 153,936 Residential Mortgages Credit Risk Profile by Internally Assigned Grade 1-4 family Construction Total residential mortgages (In thousands) September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 Grade: Pass $ 253,414 $ 294,983 $ 244 $ 804 $ 253,658 $ 295,787 Special mention 398 343 — — 398 343 Substandard 4,977 2,029 — — 4,977 2,029 Total $ 258,789 $ 297,355 $ 244 $ 804 $ 259,033 $ 298,159 Consumer Loans Credit Risk Profile Based on Payment Activity Home equity Auto and other Total consumer loans (In thousands) September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 Performing $ 94,526 $ 79,762 $ 49,900 $ 105,117 $ 144,426 $ 184,879 Nonperforming 1,220 517 401 895 1,621 1,412 Total $ 95,746 $ 80,279 $ 50,301 $ 106,012 $ 146,047 $ 186,291 The following table summarizes information about total loans rated Special Mention or lower as of September 30, 2017 and December 31, 2016. The table below includes consumer loans that are special mention and substandard accruing that are classified in the above table as performing based on payment activity. September 30, 2017 December 31, 2016 (In thousands) Business Acquired Loans Total Business Acquired Loans Total Non-Accrual $ 17,679 $ 4,672 $ 22,351 $ 16,816 $ 5,424 $ 22,240 Substandard Accruing 36,162 35,089 71,251 51,125 44,177 95,302 Total Classified 53,841 39,761 93,602 67,941 49,601 117,542 Special Mention 17,699 20,284 37,983 7,479 4,323 11,802 Total Criticized $ 71,540 $ 60,045 $ 131,585 $ 75,420 $ 53,924 $ 129,344

DEPOSITS

DEPOSITS	9 Months Ended
	Sep. 30, 2017
Deposits [Abstract]
DEPOSITS	DEPOSITS A summary of time deposits is as follows: (In thousands) September 30, December 31, Time less than $250,000 $ 2,200,338 $ 2,015,332 Time $250,000 or more 373,285 318,211 Total time deposits $ 2,573,623 $ 2,333,543 Included in total deposits are brokered deposits of $1.1 billion and $0.9 billion at September 30, 2017 and December 31, 2016 , respectively. Included in total brokered deposits are reciprocal deposits of $97.4 million and $113.4 million at September 30, 2017 and December 31, 2016 , respectively.

BORROWED FUNDS

BORROWED FUNDS	9 Months Ended
	Sep. 30, 2017
Debt Disclosure [Abstract]
BORROWED FUNDS	BORROWED FUNDS Borrowed funds at September 30, 2017 and December 31, 2016 are summarized, as follows: September 30, 2017 December 31, 2016 Weighted Weighted Average Average (Dollars in thousands) Principal Rate Principal Rate Short-term borrowings: Advances from the FHLB $ 1,061,300 1.27 % $ 1,072,044 0.71 % Other borrowings — — 10,000 2.42 Total short-term borrowings: 1,061,300 1.27 1,082,044 0.72 Long-term borrowings: Advances from the FHLB and other borrowings 338,054 1.49 142,792 1.53 Subordinated borrowings 73,831 7.00 73,697 7.00 Junior subordinated borrowings 15,464 3.16 15,464 2.77 Total long-term borrowings: 427,349 2.50 231,953 3.35 Total $ 1,488,649 1.63 % $ 1,313,997 1.19 % Short-term debt includes Federal Home Loan Bank (“FHLB”) advances with an original maturity of less than one year and a short-term line-of-credit drawdown through a correspondent bank. The Bank also maintains a $3.0 million secured line of credit with the FHLB that bears a daily adjustable rate calculated by the FHLB. There was no outstanding balance on the FHLB line of credit for the periods ended September 30, 2017 and December 31, 2016 . The Bank is approved to borrow on a short-term basis from the Federal Reserve Bank of Boston as a non-member bank. The Bank has pledged certain loans and securities to the Federal Reserve Bank to support this arrangement. No borrowings with the Federal Reserve Bank took place for the periods ended September 30, 2017 and December 31, 2016 . Long-term FHLB advances consist of advances with an original maturity of more than one year. The advances outstanding at September 30, 2017 include callable advances totaling $4.0 million , and amortizing advances totaling $1.1 million . The advances outstanding at December 31, 2016 include callable advances totaling $11.0 million , and amortizing advances totaling $1.2 million . All FHLB borrowings, including the line of credit, are secured by a blanket security agreement on certain qualified collateral, principally all residential first mortgage loans and certain securities. A summary of maturities of FHLB advances as of September 30, 2017 is as follows: September 30, 2017 Weighted Average (In thousands, except rates) Principal Rate Fixed rate advances maturing: 2017 $ 1,018,565 1.28 % 2018 218,836 1.28 2019 150,000 1.64 2020 4,464 1.94 2021 and beyond 7,489 2.69 Total FHLB advances $ 1,399,354 1.33 % The Company did not have variable-rate FHLB advances for the periods ended September 30, 2017 and December 31, 2016 . In September 2012, the Company issued fifteen year subordinated notes in the amount of $75.0 million at a discount of 1.15% . The interest rate is fixed at 6.875% for the first ten years. After ten years , the notes become callable and convert to an interest rate of three-month LIBOR rate plus 5.113% . The subordinated note includes reduction to the note principal balance of $614 thousand and $706 thousand for unamortized debt issuance costs as of September 30, 2017 and December 31 2016, respectively. The Company holds 100% of the common stock of Berkshire Hills Capital Trust I (“Trust I”) which is included in other assets with a cost of $0.5 million . The sole asset of Trust I is $15.5 million of the Company’s junior subordinated debentures due in 2035. These debentures bear interest at a variable rate equal to LIBOR plus 1.85% and had a rate of 3.16% and 2.77% at September 30, 2017 and December 31, 2016 , respectively. The Company has the right to defer payments of interest for up to five years on the debentures at any time, or from time to time, with certain limitations, including a restriction on the payment of dividends to shareholders while such interest payments on the debentures have been deferred. The Company has not exercised this right to defer payments. The Company has the right to redeem the debentures at par value. Trust I is considered a variable interest entity for which the Company is not the primary beneficiary. Accordingly, Trust I is not consolidated into the Company’s financial statements.

CAPITAL RATIOS AND SHAREHOLDERS

CAPITAL RATIOS AND SHAREHOLDERS' EQUITY	9 Months Ended
	Sep. 30, 2017
Stockholders' Equity Note [Abstract]
CAPITAL RATIOS AND STOCKHOLDERS' EQUITY	CAPITAL RATIOS AND SHAREHOLDERS’ EQUITY The actual and required capital ratios were as follows: September 30, Regulatory December 31, Regulatory Company (consolidated) Total capital to risk weighted assets 14.3 % 10.0 % 11.9 % 10.0 % Common equity tier 1 capital to risk weighted assets 12.3 6.5 9.9 6.5 Tier 1 capital to risk weighted assets 12.5 8.0 10.1 8.0 Tier 1 capital to average assets 9.5 5.0 7.9 5.0 Bank Total capital to risk weighted assets 11.7 % 10.0 % 11.2 % 10.0 % Common equity tier 1 capital to risk weighted assets 10.4 6.5 10.0 6.5 Tier 1 capital to risk weighted assets 10.4 8.0 10.0 8.0 Tier 1 capital to average assets 8.0 5.0 7.8 5.0 At each date shown, the Company and the Bank met the conditions to be classified as “well capitalized” under the relevant regulatory framework. To be categorized as well capitalized, an institution must maintain minimum total risk-based, Tier 1 risk-based, and Tier 1 leverage ratios as set forth in the table above. Effective January 1, 2015, the Company and the Bank became subject to the Basel III rule that requires the Company and the Bank to assess their Common equity Tier 1 capital to risk weighted assets and the Company and the Bank each exceed the minimum to be well capitalized. In addition, the final capital rules added a requirement to maintain a minimum conservation buffer, composed of Common equity Tier 1 capital, of 2.5% of risk-weighted assets, to be phased in over three years and applied to the Common equity Tier 1 risk-based capital ratio, the Tier 1 risk-based capital ratio, and the Total risk-based capital ratio. Accordingly, banking organizations, on a fully phased in basis no later than January 1, 2019, must maintain a minimum Common equity Tier 1 risk-based capital ratio of 7.0% , a minimum Tier 1 risk-based capital ratio of 8.5% , and a minimum Total risk-based capital ratio of 10.5% . The required minimum conservation buffer began to be phased in incrementally, starting at 0.625% on January 1, 2016, increased to 1.25% on January 1, 2017, and will increase to 1.875% on January 1, 2018 and 2.5% on January 1, 2019. The final capital rules impose restrictions on capital distributions and certain discretionary cash bonus payments if the minimum capital conservation buffer is not met. At September 30, 2017 , the capital levels of both the Company and the Bank exceeded all regulatory capital requirements and their regulatory capital ratios were above the minimum levels required to be considered well capitalized for regulatory purposes. The capital levels of both the Company and the Bank at September 30, 2017 also exceeded the minimum capital requirements including the currently applicable capital conservation buffer of 1.25% . Accumulated other comprehensive income (loss) Components of accumulated other comprehensive income is as follows: (In thousands) September 30, December 31, Other accumulated comprehensive income, before tax: Net unrealized holding gain on AFS securities $ 21,132 $ 25,176 Net unrealized loss on cash flow hedging derivatives — (6,573 ) Net unrealized holding loss on pension plans (2,954 ) (2,954 ) Income taxes related to items of accumulated other comprehensive income: Net unrealized holding gain on AFS securities (8,155 ) (9,636 ) Net unrealized loss on cash flow hedging derivatives — 2,589 Net unrealized holding loss on pension plans 1,164 1,164 Accumulated other comprehensive income $ 11,187 $ 9,766 The following table presents the components of other comprehensive income for the three and nine months ended September 30, 2017 and 2016 : (In thousands) Before Tax Tax Effect Net of Tax Three Months Ended September 30, 2017 Net unrealized holding gain on AFS securities: x Net unrealized gains arising during the period $ 1,460 $ (605 ) $ 855 Less: reclassification adjustment for (losses) realized in net income (1 ) — (1 ) Net unrealized holding gain on AFS securities 1,461 (605 ) 856 Net unrealized gain on cash flow hedging derivatives: Net unrealized (loss) arising during the period — — — Less: reclassification adjustment for (losses) realized in net income — — — Net unrealized gain on cash flow hedging derivatives — — — Other comprehensive income $ 1,461 $ (605 ) $ 856 Three Months Ended September 30, 2016 Net unrealized holding (loss) on AFS securities: Net unrealized (losses) arising during the period $ (5,576 ) $ 2,190 $ (3,386 ) Less: reclassification adjustment for gains realized in net income 78 (28 ) 50 Net unrealized holding (loss) on AFS securities (5,654 ) 2,218 (3,436 ) Net unrealized gain on cash flow hedging derivatives: Net unrealized gain arising during the period 1,363 (547 ) 816 Less: reclassification adjustment for (losses) realized in net income (1,367 ) 549 (818 ) Net unrealized gain on cash flow hedging derivatives 2,730 (1,096 ) 1,634 Other comprehensive (loss) $ (2,924 ) $ 1,122 $ (1,802 ) (In thousands) Before Tax Tax Effect Net of Tax Nine Months Ended September 30, 2017 Net unrealized holding (loss) on AFS securities: x Net unrealized gains arising during the period $ 8,524 $ (3,232 ) $ 5,292 Less: reclassification adjustment for gains realized in net income 12,568 (4,713 ) 7,855 Net unrealized holding (loss) on AFS securities (4,044 ) 1,481 (2,563 ) Net unrealized gain on cash flow hedging derivatives: Net unrealized (loss) arising during the period (449 ) 180 (269 ) Less: reclassification adjustment for (losses) realized in net income (7,022 ) 2,769 (4,253 ) Net unrealized gain on cash flow hedging derivatives 6,573 (2,589 ) 3,984 Other comprehensive income $ 2,529 $ (1,108 ) $ 1,421 Nine Months Ended September 30, 2016 Net unrealized holding gain on AFS securities: Net unrealized gains arising during the period $ 21,740 $ (8,366 ) $ 13,374 Less: reclassification adjustment for gains realized in net income 101 (36 ) 65 Net unrealized holding gain on AFS securities 21,639 (8,330 ) 13,309 Net unrealized (loss) on cash flow hedging derivatives: Net unrealized (loss) arising during the period (5,322 ) 2,136 (3,186 ) Less: reclassification adjustment for (losses) realized in net income (2,662 ) 1,069 (1,593 ) Net unrealized (loss) on cash flow hedging derivatives (2,660 ) 1,067 (1,593 ) Other comprehensive income $ 18,979 $ (7,263 ) $ 11,716 The following table presents the changes in each component of accumulated other comprehensive income (loss), for the three and nine months ended September 30, 2017 and 2016 : (In thousands) Net unrealized holding gain on AFS Securities Net loss on effective cash flow hedging derivatives Net unrealized holding loss on pension plans Total Three Months Ended September 30, 2017 Balance at Beginning of Period $ 12,121 $ — $ (1,790 ) $ 10,331 Other comprehensive gain before reclassifications 855 — — 855 Less: amounts reclassified from accumulated other comprehensive income (loss) (1 ) — — (1 ) Total other comprehensive income 856 — — 856 Balance at End of Period $ 12,977 $ — $ (1,790 ) $ 11,187 Three Months Ended September 30, 2016 Balance at Beginning of Period $ 20,625 $ (8,335 ) $ (2,077 ) $ 10,213 Other comprehensive (loss) gain before reclassifications (3,386 ) 816 — (2,570 ) Less: amounts reclassified from accumulated other comprehensive income (loss) 50 (818 ) — (768 ) Total other comprehensive (loss) income (3,436 ) 1,634 — (1,802 ) Balance at End of Period $ 17,189 $ (6,701 ) $ (2,077 ) $ 8,411 (In thousands) Net unrealized holding gain on AFS Securities Net loss on effective cash flow hedging derivatives Net unrealized holding loss on pension plans Total Nine Months Ended September 30, 2017 Balance at Beginning of Period $ 15,540 $ (3,984 ) $ (1,790 ) $ 9,766 Other comprehensive gain (loss) before reclassifications 5,292 (269 ) — 5,023 Less: amounts reclassified from accumulated other comprehensive income (loss) 7,855 (4,253 ) — 3,602 Total other comprehensive (loss) income (2,563 ) 3,984 — 1,421 Balance at End of Period $ 12,977 $ — $ (1,790 ) $ 11,187 Nine Months Ended September 30, 2016 Balance at Beginning of Period $ 3,880 $ (5,108 ) $ (2,077 ) $ (3,305 ) Other comprehensive gain (loss) before reclassifications 13,374 (3,186 ) — 10,188 Less: amounts reclassified from accumulated other comprehensive income (loss) 65 (1,593 ) — (1,528 ) Total other comprehensive income (loss) 13,309 (1,593 ) — 11,716 Balance at End of Period $ 17,189 $ (6,701 ) $ (2,077 ) $ 8,411 The following table presents the amounts reclassified out of each component of accumulated other comprehensive income (loss) for the three and nine months ended September 30, 2017 and 2016 : Affected Line Item in the Three Months Ended September 30, Statement where Net Income (In thousands) 2017 2016 is Presented Realized (losses)/gains on AFS securities: $ (1 ) $ 78 Non-interest income — (28 ) Tax expense (1 ) 50 Net of tax Realized (losses) on cash flow hedging derivatives: — (1,367 ) Non-interest income — 549 Tax expense — (818 ) Net of tax Total reclassifications for the period $ (1 ) $ (768 ) Net of tax Affected Line Item in the Nine Months Ended September 30, Statement where Net Income (In thousands) 2017 2016 is Presented Realized gains on AFS securities: $ 12,568 $ 101 Non-interest income (4,713 ) (36 ) Tax expense 7,855 65 Net of tax Realized (losses) on cash flow hedging derivatives: (393 ) — Interest expense (6,629 ) — Non-interest income — (2,662 ) Non-interest expense 2,769 1,069 Tax benefit (4,253 ) (1,593 ) Net of tax Total reclassifications for the period $ 3,602 $ (1,528 ) Net of tax

EARNINGS PER SHARE

EARNINGS PER SHARE	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
EARNINGS PER SHARE	EARNINGS PER SHARE Earnings per share have been computed based on the following (average diluted shares outstanding are calculated using the treasury stock method): Three Months Ended September 30, Nine Months Ended September 30, (In thousands, except per share data) 2017 2016 2017 2016 Net income $ 22,903 $ 16,381 $ 58,057 $ 48,339 Average number of common shares issued 41,370 32,273 38,958 32,216 Less: average number of treasury shares 947 1,137 970 1,117 Less: average number of unvested stock award shares 439 515 441 515 Average number of basic common shares outstanding 39,984 30,621 37,547 30,584 Plus: dilutive effect of unvested stock award shares 116 131 116 115 Plus: dilutive effect of stock options outstanding 45 59 45 58 Average number of diluted common shares outstanding 40,145 30,811 37,708 30,757 Earnings per share: Basic $ 0.57 $ 0.53 $ 1.55 $ 1.58 Diluted $ 0.57 $ 0.53 $ 1.54 $ 1.57 For the nine months ended September 30, 2017 , 325 thousand shares of restricted stock and 46 thousand options were anti-dilutive and therefore excluded from the earnings per share calculations. For the nine months ended September 30, 2016 , 401 thousand shares of restricted stock and 201 thousand options were anti-dilutive and therefore excluded from the earnings per share calculations.

STOCK-BASED COMPENSATION PLANS

STOCK-BASED COMPENSATION PLANS	9 Months Ended
	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
STOCK-BASED COMPENSATION PLANS	STOCK-BASED COMPENSATION PLANS A combined summary of activity in the Company’s stock award and stock option plans for the nine months ended September 30, 2017 is presented in the following table: Non-Vested Stock Awards Outstanding Stock Options Outstanding (Shares in thousands) Number of Shares Weighted-Average Grant Date Fair Value Number of Shares Weighted-Average Exercise Price December 31, 2016 448 $ 26.28 109 $ 15.72 Granted 156 35.60 — — Stock options exercised — — (11 ) 14.47 Stock awards vested (162 ) 25.56 — — Forfeited (10 ) 29.26 — — Expired — — (10 ) 33.46 September 30, 2017 432 $ 29.64 88 $ 13.86 Exercisable options at September 30, 2017 88 $ 13.86 During the nine months ended September 30, 2017 and 2016 , proceeds from stock option exercises totaled $161 thousand and $142 thousand , respectively. During the nine months ended September 30, 2017 , there were 162 thousand shares issued in connection with vested stock awards. During the nine months ended September 30, 2016 , there were 116 thousand shares issued in connection with vested stock awards. All of these shares were issued from available treasury stock. Stock-based compensation expense totaled $3.9 million and $3.5 million during the nine months ended September 30, 2017 and 2016 , respectively. Stock-based compensation expense is recognized over the requisite service period for all awards.

DERIVATIVE INSTRUMENTS AND HEDG

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES	9 Months Ended
	Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES	DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES As of September 30, 2017 , the Company held derivatives with a total notional amount of $2.5 billion . The Company had economic hedges and non-hedging derivatives totaling $2.2 billion and $0.3 billion , respectively, which are not designated as hedges for accounting purposes with changes in fair value recorded directly through earnings. Economic hedges included interest rate swaps totaling $1.6 billion , risk participation agreements with dealer banks of $0.1 billion , and $0.5 billion in forward commitment contracts. As part of the Company’s risk management strategy, the Company enters into interest rate swap agreements to mitigate the interest rate risk inherent in certain of the Company’s assets and liabilities. Interest rate swap agreements involve the risk of dealing with both Bank customers and institutional derivative counterparties and their ability to meet contractual terms. The agreements are entered into with counterparties that meet established credit standards and contain master netting and collateral provisions protecting the at-risk party. The derivatives program is overseen by the Risk Management/Capital Committee of the Company’s Board of Directors. Based on adherence to the Company’s credit standards and the presence of the netting and collateral provisions, the Company believes that the credit risk inherent in these contracts was not significant at September 30, 2017 . The Company pledged collateral to derivative counterparties in the form of cash totaling $1.4 million and securities with an amortized cost of $26.0 million and a fair value of $25.9 million as of September 30, 2017 . The Company does not typically require its commercial customers to post cash or securities as collateral on its program of back-to-back economic hedges. However certain language is written into the International Swaps Dealers Association, Inc. (“ISDA”) and loan documents where, in default situations, the Bank is allowed to access collateral supporting the loan relationship to recover any losses suffered on the derivative asset or liability. The Company may need to post additional collateral in the future in proportion to potential increases in unrealized loss positions. Information about derivative assets and liabilities at September 30, 2017 , follows: Weighted Weighted Average Rate Estimated Notional Average Contract Fair Value Amount Maturity Received pay rate Asset (Liability) (In thousands) (In years) (In thousands) Cash flow hedges: Interest rate swaps on FHLB borrowings $ — 0 — % — % $ — Total cash flow hedges — — Economic hedges: Interest rate swap on tax advantaged economic development bond 10,916 12.2 1.60 % 5.09 % (1,827 ) Interest rate swaps on loans with commercial loan customers 796,914 6.1 3.09 % 4.19 % (8,576 ) Reverse interest rate swaps on loans with commercial loan customers 796,914 6.1 4.19 % 3.09 % 8,572 Risk participation agreements with dealer banks 117,067 9.4 12 Forward sale commitments 459,203 0.2 500 Total economic hedges 2,181,014 (1,319 ) Non-hedging derivatives: Commitments to lend 310,327 0.2 6,455 Total non-hedging derivatives 310,327 6,455 Total $ 2,491,341 $ 5,136 Information about derivative assets and liabilities at December 31, 2016 , follows: Weighted Weighted Average Rate Estimated Notional Average Contract Fair Value Amount Maturity Received pay rate Asset (Liability) (In thousands) (In years) (In thousands) Cash flow hedges: Interest rate swaps on FHLB borrowings $ 300,000 2.3 0.63 % 2.29 % $ (6,573 ) Total cash flow hedges 300,000 (6,573 ) Economic hedges: Interest rate swap on tax advantaged economic development bond 11,386 12.9 0.98 % 5.09 % (2,021 ) Interest rate swaps on loans with commercial loan customers 668,541 6.2 2.43 % 4.21 % (6,752 ) Reverse interest rate swaps on loans with commercial loan customers 668,541 6.2 4.21 % 2.43 % 7,077 Risk participation agreements with dealer banks 83,360 11.6 5 Forward sale commitments 259,889 0.2 722 Total economic hedges 1,691,717 (969 ) Non-hedging derivatives: Commitments to lend 208,145 0.2 4,738 Total non-hedging derivatives 208,145 4,738 Total $ 2,199,862 $ (2,804 ) Cash flow hedges In the first quarter of 2017, the Company maintained six interest rate swap contracts with an aggregate notional value of $300 million with original durations of three years. This hedge strategy converted one month rolling FHLB borrowings based on the FHLB’s one month fixed interest rate to fixed interest rates, thereby protecting the Company from floating interest rate variability. On February 7, 2017, the Company initiated and subsequently terminated all of its interest rate swaps associated with FHLB advances with 1-month LIBOR based floating interest rates of an aggregate notional amount of $300 million. As of March 31, 2017, the Company no longer held the FHLB advances associated with the interest rate swaps. As a result, the Company reclassified $6.6 million of losses from the effective portion of the unrealized changes in the fair value of the terminated derivatives from other comprehensive income to non-interest income as the forecasted transactions to the related FHLB advances will not occur. For the periods presented prior to the termination, the effective portion of unrealized changes in the fair value of derivatives accounted for as cash flow hedges was reported in other comprehensive income. Each quarter, the Company assessed the effectiveness of each hedging relationship by comparing the changes in cash flows of the derivative hedging instrument with the changes in cash flows of the designated hedged item or transaction. Hedge ineffectiveness on interest rate swaps designated as cash flow hedges was immaterial to the Company’s financial statements during the three and nine months ended September 30, 2017 and 2016 . Amounts included in the Consolidated Statements of Income and in the other comprehensive income section of the Consolidated Statements of Comprehensive Income (related to interest rate derivatives designated as hedges of cash flows), were as follows: Three Months Ended September 30, Nine Months Ended September 30, (In thousands) 2017 2016 2017 2016 Interest rate swaps on FHLB borrowings: Unrealized (loss) recognized in accumulated other comprehensive loss $ — $ 1,363 $ (449 ) $ (5,322 ) Less: reclassification of unrealized (loss) from accumulated other comprehensive income to interest expense — (1,367 ) (393 ) (2,662 ) Less: reclassification of unrealized (loss) from accumulated other comprehensive income to other non-interest expense — — (6,629 ) — Net tax (expense) benefit on items recognized in accumulated other comprehensive income — (1,096 ) (2,589 ) 1,067 Other comprehensive gain (loss) recorded in accumulated other comprehensive income, net of reclassification adjustments and tax effects $ — $ 1,634 $ 3,984 $ (1,593 ) Economic hedges As of September 30, 2017 , the Company has an interest rate swap with a $10.9 million notional amount to swap out the fixed rate of interest on an economic development bond bearing a fixed rate of 5.09% , currently within the Company’s trading portfolio under the fair value option, in exchange for a LIBOR-based floating rate. The intent of the economic hedge is to improve the Company’s asset sensitivity to changing interest rates in anticipation of favorable average floating rates of interest over the 21 -year life of the bond. The fair value changes of the economic development bond are mostly offset by fair value changes of the related interest rate swap. The Company also offers certain derivative products directly to qualified commercial borrowers. The Company economically hedges derivative transactions executed with commercial borrowers by entering into mirror-image, offsetting derivatives with third-party financial institutions. The transaction allows the Company’s customer to convert a variable-rate loan to a fixed rate loan. Because the Company acts as an intermediary for its customer, changes in the fair value of the underlying derivative contracts mostly offset each other in earnings. Credit valuation adjustments arising from the difference in credit worthiness of the commercial loan and financial institution counterparties totaled $(53) thousand as of September 30, 2017 . The interest income and expense on these mirror image swaps exactly offset each other. The Company has risk participation agreements with dealer banks. Risk participation agreements occur when the Company participates on a loan and a swap where another bank is the lead. The Company gets paid a fee to take on the risk associated with having to make the lead bank whole on Berkshire’s portion of the pro-rated swap should the borrower default. Changes in fair value are recorded in current period earnings. The Company utilizes forward sale commitments to hedge interest rate risk and the associated effects on the fair value of interest rate lock commitments and loans originated for sale. The forward sale commitments are accounted for as derivatives with changes in fair value recorded in current period earnings. The Company uses the following types of forward sale commitments contracts: • Best efforts loan sales, • Mandatory delivery loan sales, and • To Be Announced (“TBA”) mortgage-backed securities sales. A best efforts contract refers to a loan sale agreement where the Company commits to deliver an individual mortgage loan of a specified principal amount and quality to an investor if the loan to the underlying borrower closes. The Company may enter into a best efforts contract once the price is known, which is shortly after the potential borrower’s interest rate is locked. A mandatory delivery contract is a loan sale agreement where the Company commits to deliver a certain principal amount of mortgage loans to an investor at a specified price on or before a specified date. Generally, the Company may enter into mandatory delivery contracts shortly after the loan closes with a customer. The Company may sell TBA mortgage-backed securities to hedge the changes in fair value of interest rate lock commitments and held for sale loans, which do not have corresponding best efforts or mandatory delivery contracts. These security sales transactions are closed once mandatory contracts are written. On the closing date the price of the security is locked-in, and the sale is paired-off with a purchase of the same security. Settlement of the security purchase/sale transaction is done with cash on a net-basis. Non-hedging derivatives The Company enters into interest rate lock commitments (“IRLCs”) for residential mortgage loans, which commit the Company to lend funds to a potential borrower at a specific interest rate and within a specified period of time. IRLCs that relate to the origination of mortgage loans that will be held for sale are considered derivative financial instruments under applicable accounting guidance. Outstanding IRLCs expose the Company to the risk that the price of the mortgage loans underlying the commitments may decline due to increases in mortgage interest rates from inception of the rate lock to the funding of the loan. The IRLCs are free-standing derivatives which are carried at fair value with changes recorded in noninterest income in the Company’s consolidated statements of income. Changes in the fair value of IRLCs subsequent to inception are based on changes in the fair value of the underlying loan resulting from the fulfillment of the commitment and changes in the probability that the loan will fund within the terms of the commitment, which is affected primarily by changes in interest rates and the passage of time. Amounts included in the Consolidated Statements of Income related to economic hedges and non-hedging derivatives were as follows: Three Months Ended September 30, Nine Months Ended September 30, (In thousands) 2017 2016 2017 2016 Economic hedges Interest rate swap on industrial revenue bond: Unrealized gain (loss) recognized in other non-interest income $ 70 $ 29 $ 194 $ (802 ) Interest rate swaps on loans with commercial loan customers: Unrealized (loss) recognized in other non-interest income (142 ) 2,411 (1,824 ) (18,911 ) Reverse interest rate swaps on loans with commercial loan customers: Unrealized gain recognized in other non-interest income 142 (2,411 ) 1,824 18,911 (Unfavorable) Favorable change in credit valuation adjustment recognized in other non-interest income (53 ) (62 ) (329 ) (495 ) Risk participation agreements: Unrealized gain recognized in other non-interest income 2 (14 ) 7 102 Forward commitments: Unrealized gain (loss) recognized in other non-interest income 500 (582 ) 224 (1,898 ) Realized gain (loss) in other non-interest income (983 ) 109 (3,651 ) (224 ) Non-hedging derivatives Commitments to lend Unrealized gain recognized in other non-interest income $ 6,455 $ 1,574 $ 21,891 $ 3,635 Realized gain in other non-interest income 7,402 760 23,869 2,505 Assets and Liabilities Subject to Enforceable Master Netting Arrangements Interest Rate Swap Agreements (“Swap Agreements”) The Company enters into swap agreements to facilitate the risk management strategies for commercial banking customers. The Company mitigates this risk by entering into equal and offsetting swap agreements with highly rated third party financial institutions. The swap agreements are free-standing derivatives and are recorded at fair value in the Company’s consolidated statements of condition. The Company is party to master netting arrangements with its financial institution counterparties; however, the Company does not offset assets and liabilities under these arrangements for financial statement presentation purposes. The master netting arrangements provide for a single net settlement of all swap agreements, as well as collateral, in the event of default on, or termination of, any one contract. Collateral generally in the form of marketable securities is received or posted by the counterparty with net liability positions, respectively, in accordance with contract thresholds. The Company had net asset positions with its commercial banking counterparties totaling $11.9 million and $11.5 million as of September 30, 2017 and December 31, 2016 , respectively. The Company had net liability positions with its financial institution counterparties totaling $10.5 million and $15.4 million as of September 30, 2017 and December 31, 2016 , respectively. The Company had net liability positions with its commercial banking counterparties totaling $3.3 million and $4.4 million as of September 30, 2017 and December 31, 2016 . The collateral posted by the Company that covered liability positions was $10.5 million and $19.8 million as of September 30, 2017 and December 31, 2016 , respectively. The following table presents the assets and liabilities subject to an enforceable master netting arrangement as of September 30, 2017 and December 31, 2016 : Offsetting of Financial Assets and Derivative Assets Gross Amounts of Gross Amounts Offset in the Net Amounts of Assets Presented in the Gross Amounts Not Offset in the Statements of Condition Recognized Statements of Statements of Financial Cash (In thousands) Assets Condition Condition Instruments Collateral Received Net Amount September 30, 2017 Interest Rate Swap Agreements: Institutional counterparties $ 63 $ — $ 63 $ — $ — $ 63 Commercial counterparties 11,909 — 11,909 — — 11,909 Total $ 11,972 $ — $ 11,972 $ — $ — $ 11,972 Offsetting of Financial Liabilities and Derivative Liabilities Gross Amounts of Gross Amounts Offset in the Net Amounts of Liabilities Presented in the Gross Amounts Not Offset in the Statements of Condition Recognized Statements of Statements of Financial Cash (In thousands) Liabilities Condition Condition Instruments Collateral Pledged Net Amount September 30, 2017 Interest Rate Swap Agreements: Institutional counterparties $ (13,903 ) $ 3,450 $ (10,453 ) $ 9,043 $ 1,410 $ — Commercial counterparties (3,369 ) 32 (3,337 ) — — (3,337 ) Total $ (17,272 ) $ 3,482 $ (13,790 ) $ 9,043 $ 1,410 $ (3,337 ) Offsetting of Financial Assets and Derivative Assets Gross Amounts of Gross Amounts Offset in the Net Amounts of Assets Presented in the Gross Amounts Not Offset in the Statements of Condition Recognized Statements of Statements of Financial Cash (In thousands) Assets Condition Condition Instruments Collateral Received Net Amount December 31, 2016 Interest Rate Swap Agreements: Institutional counterparties $ 49 $ — $ 49 $ — $ — $ 49 Commercial counterparties 11,461 — 11,461 — — 11,461 Total $ 11,510 $ — $ 11,510 $ — $ — $ 11,510 Offsetting of Financial Liabilities and Derivative Liabilities Gross Amounts of Gross Amounts Offset in the Net Amounts of Liabilities Presented in the Gross Amounts Not Offset in the Statements of Condition Recognized Statements of Statements of Financial Cash (In thousands) Liabilities Condition Condition Instruments Collateral Pledged Net Amount December 31, 2016 Interest Rate Swap Agreements: Institutional counterparties $ (20,077 ) $ 4,689 $ (15,388 ) $ 14,738 $ 650 $ — Commercial counterparties (4,407 ) 23 (4,384 ) — — (4,384 ) Total $ (24,484 ) $ 4,712 $ (19,772 ) $ 14,738 $ 650 $ (4,384 )

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
FAIR VALUE MEASUREMENTS	FAIR VALUE MEASUREMENTS A description of the valuation methodologies used for assets and liabilities measured at fair value, as well as the general classification of such instruments pursuant to the valuation hierarchy, is set forth below. These valuation methodologies were applied to all of the Company’s financial assets and financial liabilities that are carried at fair value. Recurring Fair Value Measurements The following table summarizes financial assets and financial liabilities measured at fair value on a recurring basis as of September 30, 2017 and December 31, 2016 , segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value. September 30, 2017 Level 1 Level 2 Level 3 Total (In thousands) Inputs Inputs Inputs Fair Value Trading security $ — $ — $ 12,603 $ 12,603 Available-for-sale securities: Municipal bonds and obligations — 118,760 — 118,760 Agency collateralized mortgage obligations — 807,436 — 807,436 Agency residential mortgage-backed securities — 217,067 — 217,067 Agency commercial mortgage-backed securities — 63,044 — 63,044 Corporate bonds — 67,234 — 67,234 Trust preferred securities — 11,792 — 11,792 Other bonds and obligations — 10,291 — 10,291 Marketable equity securities 45,055 334 — 45,389 Loans held for sale — 143,745 — 143,745 Derivative assets 518 15,379 6,437 22,334 Capitalized servicing rights — — 2,707 2,707 Derivative liabilities — 17,198 — 17,198 December 31, 2016 Level 1 Level 2 Level 3 Total (In thousands) Inputs Inputs Inputs Fair Value Trading security $ — $ — $ 13,229 $ 13,229 Available-for-sale securities: Municipal bonds and obligations — 119,816 — 119,816 Agency collateralized mortgage obligations — 651,911 — 651,911 Agency residential mortgage-backed securities — 228,684 — 228,684 Agency commercial mortgage-backed securities — 64,534 — 64,534 Corporate bonds — 56,006 — 56,006 Trust preferred securities — 11,887 — 11,887 Other bonds and obligations — 11,158 — 11,158 Marketable equity securities 62,284 3,257 — 65,541 Loans held for sale — 120,673 — 120,673 Derivative assets 622 16,157 4,838 21,617 Capitalized servicing rights — — 798 798 Derivative liabilities — 24,420 — 24,420 There were no transfers between levels during the three months ended September 30, 2017 . During the nine months ended September 30, 2016, the Company had one transfer of $708 thousand in marketable equity securities from Level 3 to Level 2 based on a change in valuation technique driven by the availability of market data. Trading Security at Fair Value. The Company holds one security designated as a trading security. It is a tax advantaged economic development bond issued to the Company by a local nonprofit which provides wellness and health programs. The determination of the fair value for this security is determined based on a discounted cash flow methodology. Certain inputs to the fair value calculation are unobservable and there is little to no market activity in the security; therefore, the security meets the definition of a Level 3 security. The discount rate used in the valuation of the security is sensitive to movements in the 3-month LIBOR rate. Securities Available for Sale . AFS securities classified as Level 1 consist of publicly-traded equity securities for which the fair values can be obtained through quoted market prices in active exchange markets. AFS securities classified as Level 2 include most of the Company’s debt securities. The pricing on Level 2 was primarily sourced from third party pricing services, overseen by management, and is based on models that consider standard input factors such as dealer quotes, market spreads, cash flows, the U.S. Treasury yield curve, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the bond’s terms and condition, among other things. Loans Held for Sale. The Company elected the fair value option for all loans held for sale (HFS) originated for sale on or after May 1, 2012. Loans HFS are classified as Level 2 as the fair value is based on input factors such as quoted prices for similar loans in active markets. Aggregate Fair Value September 30, 2017 Aggregate Aggregate Less Aggregate (In thousands) Fair Value Unpaid Principal Unpaid Principal Loans Held for Sale $ 143,745 $ 139,298 $ 4,447 Aggregate Fair Value December 31, 2016 Aggregate Aggregate Less Aggregate (In thousands) Fair Value Unpaid Principal Unpaid Principal Loans Held for Sale $ 120,673 $ 118,178 $ 2,495 The changes in fair value of loans held for sale for the three and nine months ended September 30, 2017 , were losses of $0.4 million and gains of $2.0 million , respectively. The changes in fair value for the three and nine months ended September 30, 2016, were losses of $0.2 million and gains of $0.4 million , respectively.The changes in fair value are included in mortgage banking originations in the Consolidated Statements of Income. Interest Rate Swaps. The valuation of the Company’s interest rate swaps is obtained from a third-party pricing service and is determined using a discounted cash flow analysis on the expected cash flows of each derivative. The pricing analysis is based on observable inputs for the contractual terms of the derivatives, including the period to maturity and interest rate curves. The Company incorporates credit valuation adjustments to appropriately reflect both its own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. In adjusting the fair value of its derivative contracts for the effect of nonperformance risk, the Company has considered the impact of netting and any applicable credit enhancements, such as collateral postings. Although the Company has determined that the majority of the inputs used to value its interest rate derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with its derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by itself and its counterparties. However, as of September 30, 2017 , the Company assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its derivative positions and determined that the credit valuation adjustments are not significant to the overall valuation of its derivatives. As a result, the Company determined that its derivative valuations in their entirety are classified in Level 2 of the fair value hierarchy. Commitments to Lend. The Company enters into commitments to lend for residential mortgage loans intended for sale, which commit the Company to lend funds to a potential borrower at a specific interest rate and within a specified period of time. The estimated fair value of commitments to originate residential mortgage loans for sale is based on quoted prices for similar loans in active markets. However, this value is adjusted by a factor which considers the likelihood that the loan in a lock position will ultimately close, and by the non-refundable costs of originating the loan. The closing ratio is derived from the Bank’s internal data and is adjusted using significant management judgment. The costs to originate are primarily based on the Company’s internal commission rates that are not observable. As such, these commitments are classified as Level 3 measurements. Forward Sale Commitments . The Company utilizes forward sale commitments as economic hedges against potential changes in the values of the commitments to lend and loans originated for sale. To Be Announced (“TBA”) mortgage-backed securities forward commitment sales are used as the hedging instrument, are classified as Level 1, and consist of publicly-traded debt securities for which identical fair values can be obtained through quoted market prices in active exchange markets. The fair values of the Company’s best efforts and mandatory delivery loan sale commitments are determined similarly to the commitments to lend using quoted prices in the market place that are observable. However, costs to originate and closing ratios included in the calculation are internally generated and are based on management’s judgment and prior experience, which are considered factors that are not observable. As such, best efforts and mandatory forward commitments are classified as Level 3 measurements. Capitalized Servicing Rights. The Company accounts for certain capitalized servicing rights at fair value in its Consolidated Financial Statements, as the Company is permitted to elect the fair value option for each specific instrument. A loan servicing right asset represents the amount by which the present value of the estimated future net cash flows to be received from servicing loans exceed adequate compensation for performing the servicing. The fair value of servicing rights is estimated using a present value cash flow model. The most important assumptions used in the valuation model are the anticipated rate of the loan prepayments and discount rates. Although some assumptions in determining fair value are based on standards used by market participants, some are based on unobservable inputs and therefore are classified in Level 3 of the valuation hierarchy. These capitalized servicing rights are included in other assets on the consolidated balance sheet. The table below presents the changes in Level 3 assets and liabilities that were measured at fair value on a recurring basis for the three and nine months ended September 30, 2017 and 2016 . Assets (Liabilities) Securities Capitalized Trading Available Commitments Forward Servicing (In thousands) Security for Sale to Lend Commitments Rights Three Months Ended September 30, 2017 June 30, 2017 $ 12,837 $ — $ 7,374 $ 12 $ 1,568 Unrealized (loss) gain, net recognized in other non-interest income (76 ) — 15,146 (30 ) (132 ) Paydown of trading security (158 ) — — — — Transfers to held for sale loans — — (16,065 ) — — Additions to servicing rights — — — — 1,271 September 30, 2017 $ 12,603 $ — $ 6,455 $ (18 ) $ 2,707 Nine Months Ended September 30, 2017 December 31, 2016 $ 13,229 $ — $ 4,738 $ 100 $ 798 Unrealized gain, net recognized in other non-interest income (155 ) — 48,963 (118 ) (202 ) Paydown of trading security (471 ) — — — — Transfers to held for sale loans — — (47,246 ) — — Additions to servicing rights — — — — 2,111 September 30, 2017 $ 12,603 $ — $ 6,455 $ (18 ) $ 2,707 Unrealized gains (losses) relating to instruments still held at September 30, 2017 $ 1,763 $ — $ 6,455 $ (18 ) $ — Assets (Liabilities) Securities Capitalized Trading Available Commitments Forward Servicing (In thousands) Security for Sale to Lend Commitments Rights Three Months Ended September 30, 2016 June 30, 2016 $ 14,479 $ — $ 1,259 $ (189 ) $ — Unrealized (loss) gain, net recognized in other non-interest income (180 ) — 3,563 (62 ) — Paydown of trading security (150 ) — — — — Transfers to held for sale loans — — (3,248 ) — — September 30, 2016 $ 14,149 $ — $ 1,574 $ (251 ) $ — Nine Months Ended September 30, 2016 December 31, 2015 $ 14,189 $ 708 $ 323 $ 9 $ — Unrealized gain, net recognized in other non-interest income 405 — 6,480 (260 ) — Paydown of trading security (445 ) — — — — Transfers to Level 2 — (708 ) — — — Transfers to held for sale loans — — (5,229 ) — — September 30, 2016 $ 14,149 $ — $ 1,574 $ (251 ) $ — Unrealized gains (losses) relating to instruments still held at September 30, 2016 $ 2,610 $ — $ 1,574 $ (251 ) $ — Quantitative information about the significant unobservable inputs within Level 3 recurring assets and liabilities is as follows: Fair Value Significant Unobservable Input (In thousands) September 30, 2017 Valuation Techniques Unobservable Inputs Value Assets (Liabilities) Trading Security $ 12,603 Discounted Cash Flow Discount Rate 2.59 % Commitments to Lend 6,455 Historical Trend Closing Ratio 80.50 % Pricing Model Origination Costs, per loan $ 3,692 Forward Commitments (18 ) Historical Trend Closing Ratio 80.50 % Pricing Model Origination Costs, per loan $ 3,692 Capitalized Servicing Rights 2,707 Discounted Cash Flow Constant Prepayment rate (CPR) 10.20 % Discount Rate 10.95 % Total $ 21,747 Fair Value Significant Unobservable Input (In thousands) December 31, 2016 Valuation Techniques Unobservable Inputs Value Assets (Liabilities) Trading Security $ 13,229 Discounted Cash Flow Discount Rate 2.62 % Commitments to Lend 4,738 Historical Trend Closing Ratio 80.36 % Pricing Model Origination Costs, per loan $ 3,692 Forward Commitments 100 Historical Trend Closing Ratio 80.36 % Pricing Model Origination Costs, per loan $ 3,692 Capitalized Servicing Rights 798 Discounted Cash Flow Constant Prepayment rate (CPR) 10.40 % Discount Rate 11.00 % Total $ 18,865 Non-Recurring Fair Value Measurements The Company is required, on a non-recurring basis, to adjust the carrying value or provide valuation allowances for certain assets using fair value measurements in accordance with GAAP. The following is a summary of applicable non-recurring fair value measurements. There are no liabilities measured at fair value on a non-recurring basis. September 30, 2017 December 31, 2016 Fair Value Measurement Date as of September 30, 2017 Level 3 Level 3 Level 3 (In thousands) Inputs Inputs Inputs Assets Impaired loans $ 28,082 $ 17,761 September 2017 Capitalized servicing rights 12,663 10,726 August/September 2017 Other real estate owned 288 151 April 2016 - June 2017 Total $ 41,033 $ 28,638 Quantitative information about the significant unobservable inputs within Level 3 non-recurring assets is as follows: Fair Value (In thousands) September 30, 2017 Valuation Techniques Unobservable Inputs Range (Weighted Average) (a) Assets Impaired loans $ 28,082 Appraised value of collateral Discounted cash flow - loss severity 39.05% to 0.13% (3.70%) Appraised value $16 to $5,987 ($2,062) Capitalized servicing rights 12,663 Discounted cash flow Constant prepayment rate (CPR) 7.78% to 13.69% (10.57%) Discount rate 10.00% to 12.76% (11.55%) Other real estate owned 288 Appraised value of collateral Appraised value $94 to $215 ($226) Total $ 41,033 (a) Where dollar amounts are disclosed, the amounts represent the lowest and highest fair value of the respective assets in the population except for adjustments for market/property conditions, which represents the range of adjustments to individuals properties. Fair Value (In thousands) December 31, 2016 Valuation Techniques Unobservable Inputs Range (Weighted Average) (a) Assets Impaired loans $ 17,761 Appraised value of collateral Discounted cash flow - loss severity 0.00% to 88.70% (9.73%) Appraised value $0 to $2,192 ($1,026) Capitalized servicing rights 10,726 Discounted cash flow Constant prepayment rate (CPR) 7.35% to 14.28% (10.44%) Discount rate 10.00% to 14.00 (11.77%) Other real estate owned 151 Appraised value of collateral Appraised value $101 to $129 ($122) Total $ 28,638 (a) Where dollar amounts are disclosed, the amounts represent the lowest and highest fair value of the respective assets in the population except for adjustments for market/property conditions, which represents the range of adjustments to individuals properties. There were no Level 1 or Level 2 nonrecurring fair value measurements for the periods ended September 30, 2017 and December 31, 2016 . Impaired loans. Loans are generally not recorded at fair value on a recurring basis. Periodically, the Company records non-recurring adjustments to the carrying value of loans based on fair value measurements for partial charge-offs of the uncollectible portions of those loans. Non-recurring adjustments can also include certain impairment amounts for collateral-dependent loans calculated when establishing the allowance for credit losses. Such amounts are generally based on the fair value of the underlying collateral supporting the loan and, as a result, the carrying value of the loan less the calculated valuation amount does not necessarily represent the fair value of the loan. Real estate collateral is typically valued using appraisals or other indications of value based on recent comparable sales of similar properties or assumptions generally observable in the marketplace. However, the choice of observable data is subject to significant judgment, and there are often adjustments based on judgment in order to make observable data comparable and to consider the impact of time, the condition of properties, interest rates, and other market factors on current values. Additionally, commercial real estate appraisals frequently involve discounting of projected cash flows, which relies inherently on unobservable data. Therefore, nonrecurring fair value measurement adjustments that relate to real estate collateral have generally been classified as Level 3. Estimates of fair value for other collateral that supports commercial loans are generally based on assumptions not observable in the marketplace and therefore such valuations have been classified as Level 3. Capitalized loan servicing rights . A loan servicing right asset represents the amount by which the present value of the estimated future net cash flows to be received from servicing loans exceed adequate compensation for performing the servicing. The fair value of servicing rights is estimated using a present value cash flow model. The most important assumptions used in the valuation model are the anticipated rate of the loan prepayments and discount rates. Adjustments are only recorded when the discounted cash flows derived from the valuation model are less than the carrying value of the asset. Although some assumptions in determining fair value are based on standards used by market participants, some are based on unobservable inputs and therefore are classified in Level 3 of the valuation hierarchy. Other real estate owned (“OREO”). OREO results from the foreclosure process on residential or commercial loans issued by the Bank. Upon assuming the real estate, the Company records the property at the fair value of the asset less the estimated sales costs. Thereafter, OREO properties are recorded at the lower of cost or fair value less the estimated sales costs. OREO fair values are primarily determined based on Level 3 data including comparable sales and appraisals. Summary of Estimated Fair Values of Financial Instruments The following tables summarize the estimated fair values, and related carrying amounts, of the Company’s financial instruments. Certain financial instruments and all non-financial instruments are excluded. Accordingly, the aggregate fair value amounts presented may not necessarily represent the underlying fair value of the Company. September 30, 2017 Carrying Fair (In thousands) Amount Value Level 1 Level 2 Level 3 Financial Assets Cash and cash equivalents $ 92,046 $ 92,046 $ 92,046 $ — $ — Trading security 12,603 12,603 — — 12,603 Securities available for sale 1,341,013 1,341,013 45,055 1,295,958 — Securities held to maturity 395,065 402,799 — 368,063 34,736 FHLB bank stock and restricted securities 75,117 75,117 — 75,117 — Net loans 6,898,402 6,930,703 — — 6,930,703 Loans held for sale 143,745 143,745 — 143,745 — Accrued interest receivable 29,133 29,133 — 29,133 — Cash surrender value of bank-owned life insurance policies 161,290 161,290 — 161,290 — Derivative assets 22,334 22,334 518 15,379 6,437 Assets held for sale 322 322 — 322 — Financial Liabilities Total deposits $ 6,790,146 $ 6,785,879 $ — $ 6,785,879 $ — Short-term debt 1,061,300 1,061,232 — 1,061,232 — Long-term Federal Home Loan Bank advances 338,054 337,653 — 337,653 — Subordinated borrowings 89,295 98,394 — 98,394 — Derivative liabilities 17,198 17,198 — 17,198 — December 31, 2016 Carrying Fair (In thousands) Amount Value Level 1 Level 2 Level 3 Financial Assets Cash and cash equivalents $ 113,075 $ 113,075 $ 113,075 $ — $ — Trading security 13,229 13,229 — — 13,229 Securities available for sale 1,209,537 1,209,537 62,284 1,147,253 — Securities held to maturity 334,368 337,680 — 300,806 36,874 FHLB bank stock and restricted securities 71,112 71,112 — 71,112 — Net loans 6,505,789 6,532,745 — — 6,532,745 Loans held for sale 120,673 120,673 — 120,673 — Accrued interest receivable 26,113 26,113 — 26,113 — Cash surrender value of bank-owned life insurance policies 139,257 139,257 — 139,257 — Derivative assets 21,617 21,617 622 16,157 4,838 Assets held for sale 322 322 — 322 — Financial Liabilities Total deposits $ 6,622,092 $ 6,624,108 $ — $ 6,624,108 $ — Short-term debt 1,082,044 1,081,996 — 1,081,996 — Long-term Federal Home Loan Bank advances 142,792 143,151 — 143,151 — Subordinated borrowings 89,161 96,973 — 96,973 — Derivative liabilities 24,420 24,420 — 24,420 — Other than as discussed above, the following methods and assumptions were used by management to estimate the fair value of significant classes of financial instruments for which it is practicable to estimate that value. Cash and cash equivalents. Carrying value is assumed to represent fair value for cash and cash equivalents that have original maturities of ninety days or less. FHLB bank stock and restricted securities. Carrying value approximates fair value based on the redemption provisions of the issuers. Cash surrender value of life insurance policies. Carrying value approximates fair value. Loans, net. The carrying value of the loans in the loan portfolio is based on cash flows discounted over their respective loan origination rates. The origination rates are adjusted for substandard and special mention loans to factor the impact of declines in the loan’s credit standing. The fair value of the loans is estimated by discounting future cash flows using the current interest rates at which similar loans with similar terms would be made to borrowers of similar credit quality. The methodology utilized to determine fair value does not represent exit price. Accrued interest receivable. Carrying value approximates fair value. Deposits. The fair value of demand, non-interest bearing checking, savings and money market deposits is determined as the amount payable on demand at the reporting date. The fair value of time deposits is estimated by discounting the estimated future cash flows using market rates offered for deposits of similar remaining maturities. Borrowed funds. The fair value of borrowed funds is estimated by discounting the future cash flows using market rates for similar borrowings. Such funds include all categories of debt and debentures in the table above. Subordinated borrowings. The Company utilizes a pricing service along with internal models to estimate the valuation of its junior subordinated debentures. The junior subordinated debentures re-price every ninety days. Off-balance-sheet financial instruments. Off-balance-sheet financial instruments include standby letters of credit and other financial guarantees and commitments considered immaterial to the Company’s financial statements.

NET INTEREST INCOME AFTER PROVI

NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	9 Months Ended
	Sep. 30, 2017
Banking and Thrift, Interest [Abstract]
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES Presented below is net interest income after provision for loan losses for the three and nine months ended September 30, 2017 and 2016, respectively. Three Months Ended September 30, Nine Months Ended September 30, (In thousands) 2017 2016 2017 2016 Net interest income $ 71,998 $ 57,971 $ 208,429 $ 173,109 Provision for loan losses 4,900 4,734 14,884 13,262 Net interest income after provision for loan losses $ 67,098 $ 53,237 $ 193,545 $ 159,847

SUBSEQUENT EVENTS

SUBSEQUENT EVENTS	9 Months Ended
	Sep. 30, 2017
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTS On October 13, 2017, Commerce Bancshares Corp. ("Commerce"), the parent company of Commerce Bank & Trust Company ("Commerce Bank") merged with and into the Company in a transaction accounted for as a business combination. Commerce Bank also merged with and into Berkshire Bank. Headquartered in Worcester, Mass., Commerce Bank operated 16 branch banking offices providing a range of services in Central Massachusetts and greater Boston. With this agreement, the Company established a market position in Worcester, New England’s second largest city. Additionally, this acquisition was a catalyst for the Company’s decision to relocate its corporate headquarters to Boston and to expand its Greater Boston market initiatives. This acquisition also increased the Company’s total assets over the $10 billion Dodd Frank Act threshold for additional regulatory requirements. As established by the merger agreement, each of the 6.328 million outstanding shares of Commerce common stock was converted into the right to receive 0.93 shares of the Company's common stock, plus cash in lieu of fractional shares. Certain Commerce common stock was instead converted into the right to receive 0.465 shares of new Series B preferred stock (non-voting) issued by the Company, pursuant to limited circumstances established by the merger agreement. Each preferred share is convertible into two shares of the Company's common stock under specified conditions. As of close of business on October 13, 2017, the Company issued 4.842 million common shares and 522 thousand preferred shares as merger consideration, pursuant to the merger agreement. The value of this consideration was measured at $188.6 million for the common stock and $40.7 million for the preferred stock based on the $38.95 closing price of the Company’s common stock on the issuance date. As of the merger date, Commerce, on a consolidated basis, maintained assets with a carrying value of approximately $1.9 billion (unaudited), including loans outstanding with a carrying value of approximately $1.4 billion (unaudited). In addition, Commerce maintained deposits with a carrying value of approximately $1.7 billion (unaudited). The merger had no significant effect on the Company’s financial statements for the periods presented, aside from expenses related to the merger and ongoing systems and processes integration. These amounts are included in the financial statement line item Acquisition, Restructuring, and Other Expenses of the Consolidated Statements of Income, representing $788 thousand and $2.4 million for the three and nine months ended September 30, 2017, respectively.

BASIS OF PRESENTATION (Policies

BASIS OF PRESENTATION (Policies)	9 Months Ended
	Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	The consolidated financial statements (the “financial statements”) of Berkshire Hills Bancorp, Inc. and its subsidiaries (the “Company” or “Berkshire”) have been prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”). The Company is a Delaware corporation and the holding company for Berkshire Bank (the “Bank”), a Massachusetts-chartered trust company headquartered in Pittsfield, Massachusetts, and Berkshire Insurance Group, Inc. These financial statements include the accounts of the Company, its wholly-owned subsidiaries and the Bank’s consolidated subsidiaries. In consolidation, all significant intercompany accounts and transactions are eliminated. All material wholly-owned and majority-owned subsidiaries are consolidated unless GAAP requires otherwise.
Reclassifications	Reclassifications Certain items in prior financial statements have been reclassified to conform to the current presentation.
Recently Adopted Accounting Principles and Future Application of Accounting Pronouncements	Recently Adopted Accounting Principles Effective January 1, 2017, the following new accounting guidance was adopted by the Company: • ASU No. 2016-05, Effect of Derivative Contract Novations on Existing Hedge Accounting Relationships; • ASU No. 2016-06, Contingent Put and Call Options in Debt Instruments; • ASU No. 2016-07, Simplifying the Transition to the Equity Method of Accounting • ASU No. 2016-15, Classification of Certain Cash Receipts and Cash Payments; and • ASU No. 2017-08, Premium Amortization on Purchased Callable Debt Securities The adoption of these accounting standards did not have a material impact on the Company's financial statements. Future Application of Accounting Pronouncements In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers.” This ASU 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. ASU 2014-09 is 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, ASU No. 2015-14, “Deferral of the Effective Date” was issued and delayed the effective date of ASU 2014-09 to annual and interim periods in fiscal years beginning after December 15, 2017. While the assessment of the provisions of ASU No. 2014-09 is not complete, the timing of the Company’s revenue recognition is not expected to materially change. This ASU impacts the Company’s wealth management services, administrative services for customer deposit accounts, interchange fees, and sale of owned real estate properties. The extent of this ASU on these revenue lines is being evaluated by the Company. The Company intends to adopt the ASU for the first quarter of 2018. Adoption is not anticipated to have a material impact on the Company’s financial statements. In January 2016, the FASB issued ASU No. 2016-01, “Recognition and Measurement of Financial Assets and Financial Liabilities.” This ASU requires an entity to: i) measure equity investments at fair value through net income, with certain exceptions; (ii) present in other comprehensive income the changes in instrument-specific credit risk for financial liabilities measured using the fair value option; (iii) present financial assets and financial liabilities by measurement category and form of financial asset; (iv) calculate the fair value of financial instruments for disclosure purposes based on an exit price and; (v) assess a valuation allowance on deferred tax assets related to unrealized losses of available-for-sale debt securities in combination with other deferred tax assets. The guidance provides an election to subsequently measure certain non-marketable equity investments at cost less any impairment and adjusted for certain observable price changes. The guidance also requires a qualitative impairment assessment of such equity investments and amends certain fair value disclosure requirements. The guidance is effective for annual periods beginning after December 15, 2017. Early adoption is only permitted for the provision related to instrument specific credit risk. While the Company has performed a preliminary evaluation of the provisions of ASU No. 2016-01, the effect of the adoption will depend on the Company’s portfolio at the time of transition. In February 2016, the FASB issued ASU No. 2016-02, “Leases”. The new pronouncement improves the transparency and comparability of financial reporting around leasing transactions and more closely aligns accounting for leases with the recently issued International Financial Reporting Standard. The pronouncement affects all entities that are participants to leasing agreements. From a lessee accounting perspective, the ASU requires a lessee to recognize assets and liabilities on the balance sheet for operating leases and changes many key definitions, including the definition of a lease. The ASU includes a short-term lease exception for leases with a term of twelve months or less, in which a lessee can make an accounting policy election not to recognize lease assets and lease liabilities. Lessees will continue to differentiate between finance leases (previously referred to as capital leases) and operating leases, using classification criteria that are substantially similar to the previous guidance. For lessees, the recognition, measurement, and presentation of expenses and cash flows arising from a lease have not significantly changed from previous GAAP. From a lessor accounting perspective, the guidance is largely unchanged, except for targeted improvements to align with new terminology under lessee accounting and with the updated revenue recognition guidance in Topic 606. For sale-leaseback transactions, for a sale to occur the transfer must meet the sale criteria under the new revenue standard, ASC 606. Entities will not be required to reassess transactions previously accounted under then existing guidance. Additionally, the ASU includes additional quantitative and qualitative disclosures required by lessees and lessors to help users better understand the amount, timing, and uncertainty of cash flows arising from leases. ASU No. 2016-02 is effective for fiscal years beginning after December 31, 2018, and interim periods within those fiscal years. Lessees and lessors are required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. The modified retrospective approach includes a number of optional practical expedients that entities may elect to apply as well as transition guidance specific to nonstandard leasing transactions. The Company is currently evaluating the provisions of ASU No. 2016-02 to determine the potential impact the new standard will have on the Company's consolidated financial statements. It is expected that assets and liabilities will increase based on the present value of remaining lease payments for leases in place at the adoption date; however, this is not expected to be material to the Company's results of operations or financial position. The Company continues to evaluate the extent of potential impact the new guidance will have on the Company’s consolidated financial statements. In June 2016, the FASB issued ASU No. 2016-13, “Measurement of Credit Losses on Financial Instruments.” This ASU improves financial reporting by requiring timelier recording of credit losses on loans and other financial instruments. The ASU requires companies to measure all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. Forward-looking information will now be used in credit loss estimates. The ASU requires enhanced disclosures to provide better understanding surrounding significant estimates and judgments used in estimating credit losses, as well as the credit quality and underwriting standards of a company’s portfolio. These disclosures include qualitative and quantitative requirements that provide additional information about the amounts recorded in the financial statements. Additionally, the ASU amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. Most debt instruments will require a cumulative-effect adjustment to retained earnings on the statement of financial position as of the beginning of the first reporting period in which the guidance is adopted (modified retrospective approach). However, there is instrument-specific transition guidance. ASU No. 2016-13 is effective for interim and annual periods beginning after December 15, 2019. Early application will be permitted for interim and annual periods beginning after December 15, 2018. The Company is evaluating the provisions of ASU No. 2016-13, and will closely monitor developments and additional guidance to determine the potential impact on the Company's consolidated financial statements. The Company expects the primary changes to be the application of the expected credit loss model to the financial statements. In addition, the Company expects the guidance to change the presentation of credit losses within the available-for-sale fixed maturities portfolio through an allowance method rather than as a direct write-down. The expected credit loss model will require a financial asset to be presented at the net amount expected to be collected. The allowance method for available-for-sale debt securities will allow the Company to record reversals of credit losses if the estimate of credit losses declines. The Company is in the process of identifying and implementing required changes to loan loss estimation models and processes and evaluating the impact of this new accounting guidance, which at the date of adoption is expected to increase the allowance for credit losses with a resulting negative adjustment to retained earnings. In August 2017, the FASB issued ASU No. 2017-12, “Derivatives and Hedging: Targeted Improvements to Accounting for Hedging Activities.” The purpose of this updated guidance is to better align a company’s financial reporting for hedging activities with the economic objectives of those activities. ASU No. 2017-12 is effective for public business entities for fiscal years beginning after December 15, 2018, with early adoption, including adoption in an interim period, permitted. ASU 2017-12 requires a modified retrospective transition method in which the Company will recognize the cumulative effect of the change on the opening balance of each affected component of equity in the consolidated balance sheet as of the date of adoption. While the Company continues to assess all potential impacts of the standard, we currently expect adoption to have an immaterial impact on our consolidated financial statements.

SECURITIES AVAILABLE FOR SALE24

SECURITIES AVAILABLE FOR SALE AND HELD TO MATURITY (Tables)	9 Months Ended
	Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Summary of securities available for sale ("AFS") and held to maturity	The following is a summary of securities available for sale and held to maturity: (In thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value September 30, 2017 Securities available for sale Debt securities: Municipal bonds and obligations $ 114,365 $ 4,828 $ (433 ) $ 118,760 Agency collateralized mortgage obligations 807,772 2,538 (2,874 ) 807,436 Agency mortgage-backed securities 217,626 911 (1,470 ) 217,067 Agency commercial mortgage-backed securities 64,296 126 (1,378 ) 63,044 Corporate bonds 66,321 1,059 (146 ) 67,234 Trust preferred securities 11,350 442 — 11,792 Other bonds and obligations 10,095 204 (8 ) 10,291 Total debt securities 1,291,825 10,108 (6,309 ) 1,295,624 Marketable equity securities 36,054 9,645 (310 ) 45,389 Total securities available for sale 1,327,879 19,753 (6,619 ) 1,341,013 Securities held to maturity Municipal bonds and obligations 268,990 6,196 (1,300 ) 273,886 Agency collateralized mortgage obligations 74,277 1,679 (356 ) 75,600 Agency mortgage-backed securities 8,080 — (142 ) 7,938 Agency commercial mortgage-backed securities 10,497 — (180 ) 10,317 Tax advantaged economic development bonds 32,899 1,837 — 34,736 Other bonds and obligations 322 — — 322 Total securities held to maturity 395,065 9,712 (1,978 ) 402,799 Total $ 1,722,944 $ 29,465 $ (8,597 ) $ 1,743,812 December 31, 2016 Securities available for sale Debt securities: Municipal bonds and obligations $ 117,910 $ 2,955 $ (1,049 ) $ 119,816 Agency collateralized mortgage obligations 652,680 2,522 (3,291 ) 651,911 Agency mortgage-backed securities 230,308 557 (2,181 ) 228,684 Agency commercial mortgage-backed securities 65,673 229 (1,368 ) 64,534 Corporate bonds 56,320 408 (722 ) 56,006 Trust preferred securities 11,578 368 (59 ) 11,887 Other bonds and obligations 10,979 195 (16 ) 11,158 Total debt securities 1,145,448 7,234 (8,686 ) 1,143,996 Marketable equity securities 47,858 19,296 (1,613 ) 65,541 Total securities available for sale 1,193,306 26,530 (10,299 ) 1,209,537 Securities held to maturity Municipal bonds and obligations 203,463 3,939 (2,416 ) 204,986 Agency collateralized mortgage obligations 75,655 1,281 (411 ) 76,525 Agency mortgage-backed securities 9,102 — (243 ) 8,859 Agency commercial mortgage-backed securities 10,545 — (434 ) 10,111 Tax advantaged economic development bonds 35,278 1,596 — 36,874 Other bonds and obligations 325 — — 325 Total securities held to maturity 334,368 6,816 (3,504 ) 337,680 Total $ 1,527,674 $ 33,346 $ (13,803 ) $ 1,547,217
Schedule of amortized cost and estimated fair value of available for sale (AFS) and held to maturity (HTM) securities, segregated by contractual maturity	The amortized cost and estimated fair value of available for sale (“AFS”) and held to maturity (“HTM”) securities, segregated by contractual maturity at September 30, 2017 are presented below. Expected maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations. Mortgage-backed securities are shown in total, as their maturities are highly variable. Equity securities have no maturity and are also shown in total. Available for sale Held to maturity Amortized Fair Amortized Fair (In thousands) Cost Value Cost Value Within 1 year $ 623 $ 626 $ 2,640 $ 2,642 Over 1 year to 5 years 31,653 32,254 26,324 27,305 Over 5 years to 10 years 56,336 57,943 8,467 8,925 Over 10 years 113,519 117,254 264,780 270,072 Total bonds and obligations 202,131 208,077 302,211 308,944 Marketable equity securities 36,054 45,389 — — Mortgage-backed securities 1,089,694 1,087,547 92,854 93,855 Total $ 1,327,879 $ 1,341,013 $ 395,065 $ 402,799
Schedule of securities with unrealized losses, segregated by the duration of their continuous unrealized loss positions	Securities with unrealized losses, segregated by the duration of their continuous unrealized loss positions, are summarized as follows: Less Than Twelve Months Over Twelve Months Total Gross Gross Gross Unrealized Fair Unrealized Fair Unrealized Fair (In thousands) Losses Value Losses Value Losses Value September 30, 2017 Securities available for sale Debt securities: Municipal bonds and obligations $ 52 $ 3,046 $ 381 $ 8,828 $ 433 $ 11,874 Agency collateralized mortgage obligations 2,547 466,132 327 15,320 2,874 481,452 Agency mortgage-backed securities 1,121 106,495 349 12,654 1,470 119,149 Agency commercial mortgage-backed securities 681 32,357 697 20,678 1,378 53,035 Corporate bonds — — 146 15,859 146 15,859 Other bonds and obligations 8 2,109 — — 8 2,109 Total debt securities 4,409 610,139 1,900 73,339 6,309 683,478 Marketable equity securities 310 4,950 — — 310 4,950 Total securities available for sale 4,719 615,089 1,900 73,339 6,619 688,428 Securities held to maturity Municipal bonds and obligations 856 64,187 444 12,362 1,300 76,549 Agency collateralized mortgage obligations 356 13,557 — — 356 13,557 Agency mortgage-backed securities 142 7,938 — — 142 7,938 Agency commercial mortgage-backed securities 180 10,317 — — 180 10,317 Total securities held to maturity 1,534 95,999 444 12,362 1,978 108,361 Total $ 6,253 $ 711,088 $ 2,344 $ 85,701 $ 8,597 $ 796,789 December 31, 2016 Securities available for sale Debt securities: Municipal bonds and obligations $ 1,049 $ 13,839 $ — $ — $ 1,049 $ 13,839 Agency collateralized mortgage obligations 3,291 319,448 — — 3,291 319,448 Agency mortgage-backed securities 2,153 130,766 28 2,061 2,181 132,827 Agency commercial mortgage-backed securities 1,368 44,860 — — 1,368 44,860 Corporate bonds 11 4,780 711 19,655 722 24,435 Trust preferred securities — — 59 1,204 59 1,204 Other bonds and obligations 15 3,014 1 27 16 3,041 Total debt securities 7,887 516,707 799 22,947 8,686 539,654 Marketable equity securities 157 6,600 1,456 5,927 1,613 12,527 Total securities available for sale 8,044 523,307 2,255 28,874 10,299 552,181 Securities held to maturity Municipal bonds and obligations 2,416 69,308 — — 2,416 69,308 Agency collateralized mortgage obligations 411 14,724 — — 411 14,724 Agency mortgage-backed securities 243 8,859 — — 243 8,859 Agency commercial mortgage-backed securities 434 10,111 — — 434 10,111 Total securities held to maturity 3,504 103,002 — — 3,504 103,002 Total $ 11,548 $ 626,309 $ 2,255 $ 28,874 $ 13,803 $ 655,183

LOANS (Tables)

LOANS (Tables)	9 Months Ended
	Sep. 30, 2017
Receivables [Abstract]
Schedule of Loans	The following is a summary of total loans: September 30, 2017 December 31, 2016 (In thousands) Business Acquired Total Business Acquired Total Commercial real estate: Construction $ 265,059 $ 18,490 $ 283,549 $ 253,302 $ 34,207 $ 287,509 Single and multi-family 342,426 84,668 427,094 191,819 125,672 317,491 Other commercial real estate 1,462,500 498,094 1,960,594 1,481,223 530,215 2,011,438 Total commercial real estate 2,069,985 601,252 2,671,237 1,926,344 690,094 2,616,438 Commercial and industrial loans: 1,154,988 99,959 1,254,947 908,102 153,936 1,062,038 Total commercial loans 3,224,973 701,211 3,926,184 2,834,446 844,030 3,678,476 Residential mortgages: 1-4 family 1,717,160 258,789 1,975,949 1,583,794 297,355 1,881,149 Construction 6,933 244 7,177 11,178 804 11,982 Total residential mortgages 1,724,093 259,033 1,983,126 1,594,972 298,159 1,893,131 Consumer loans: Home equity 290,144 95,746 385,890 313,521 80,279 393,800 Auto and other 601,905 50,301 652,206 478,368 106,012 584,380 Total consumer loans 892,049 146,047 1,038,096 791,889 186,291 978,180 Total loans $ 5,841,115 $ 1,106,291 $ 6,947,406 $ 5,221,307 $ 1,328,480 $ 6,549,787
Schedule of Activity in the Accretable Yield for the Acquired Loan Portfolio that Falls Under the Review of ASC 310-30, Accounting for Certain Loans or Debt Securities Acquired in a Transfer	The following table summarizes activity in the accretable yield for the acquired loan portfolio that falls under the purview of ASC 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality : Three Months Ended September 30, (In thousands) 2017 2016 Balance at beginning of period $ 5,767 $ 6,213 Acquisitions — — Reclassification from nonaccretable difference for loans with improved cash flows 10 688 Change in cash flows that do not affect nonaccretable difference — — Reclassification to TDR — — Accretion (1,712 ) (2,298 ) Balance at end of period $ 4,065 $ 4,603 Nine Months Ended September 30, (In thousands) 2017 2016 Balance at beginning of period $ 8,738 $ 6,925 Acquisitions — 708 Reclassification from nonaccretable difference for loans with improved cash flows 343 2,106 Change in cash flows that do not affect nonaccretable difference — — Reclassification to TDR — (185 ) Accretion (5,016 ) (4,951 ) Balance at end of period $ 4,065 $ 4,603
Summary of Past Due Loans	The following is a summary of past due loans at September 30, 2017 and December 31, 2016: Business Activities Loans (In thousands) 30-59 Days 60-89 Days 90 Total Past Current Total Loans Past Due > September 30, 2017 Commercial real estate: Construction $ — $ — $ — $ — $ 265,059 $ 265,059 $ — Single and multi-family 143 260 326 729 341,697 342,426 163 Other commercial real estate 307 — 4,369 4,676 1,457,824 1,462,500 — Total 450 260 4,695 5,405 2,064,580 2,069,985 163 Commercial and industrial loans: Total 1,370 640 8,483 10,493 1,144,495 1,154,988 32 Residential mortgages: 1-4 family 1,055 1,396 2,093 4,544 1,712,616 1,717,160 125 Construction — — — — 6,933 6,933 — Total 1,055 1,396 2,093 4,544 1,719,549 1,724,093 125 Consumer loans: Home equity 74 267 1,872 2,213 287,931 290,144 228 Auto and other 2,620 384 1,115 4,119 597,786 601,905 31 Total 2,694 651 2,987 6,332 885,717 892,049 259 Total $ 5,569 $ 2,947 $ 18,258 $ 26,774 $ 5,814,341 $ 5,841,115 $ 579 Business Activities Loans (In thousands) 30-59 Days 60-89 Days 90 Total Past Current Total Loans Past Due > December 31, 2016 Commercial real estate: Construction $ — $ — $ — $ — $ 253,302 $ 253,302 $ — Single and multi-family 618 110 624 1,352 190,467 191,819 155 Other commercial real estate 481 2,243 4,212 6,936 1,474,287 1,481,223 — Total 1,099 2,353 4,836 8,288 1,918,056 1,926,344 155 Commercial and industrial loans: Total 3,090 1,301 6,290 10,681 897,421 908,102 5 Residential mortgages: 1-4 family 1,393 701 4,179 6,273 1,577,521 1,583,794 1,956 Construction 10 — — 10 11,168 11,178 — Total 1,403 701 4,179 6,283 1,588,689 1,594,972 1,956 Consumer loans: Home equity 99 — 2,981 3,080 310,441 313,521 306 Auto and other 2,483 494 968 3,945 474,423 478,368 16 Total 2,582 494 3,949 7,025 784,864 791,889 322 Total $ 8,174 $ 4,849 $ 19,254 $ 32,277 $ 5,189,030 $ 5,221,307 $ 2,438 Acquired Loans (In thousands) 30-59 Days 60-89 Days 90 Total Past Acquired Total Loans Past Due > September 30, 2017 Commercial real estate: Construction $ 570 $ — $ — $ 570 $ — $ 18,490 $ — Single and multi-family 421 78 2,600 3,099 3,285 84,668 2,385 Other commercial real estate 1,633 145 481 2,259 18,962 498,094 — Total 2,624 223 3,081 5,928 22,247 601,252 2,385 Commercial and industrial loans: Total 634 52 1,284 1,970 1,497 99,959 54 Residential mortgages: 1-4 family 624 383 1,154 2,161 7,167 258,789 30 Construction — — — — — 244 — Total 624 383 1,154 2,161 7,167 259,033 30 Consumer loans: Home equity 23 2 1,220 1,245 930 95,746 — Auto and other 258 29 416 703 358 50,301 14 Total 281 31 1,636 1,948 1,288 146,047 14 Total $ 4,163 $ 689 $ 7,155 $ 12,007 $ 32,199 $ 1,106,291 $ 2,483 Acquired Loans (In thousands) 30-59 Days 60-89 Days 90 Total Past Acquired Total Loans Past Due > December 31, 2016 Commercial real estate: — Construction $ — $ — $ — $ — $ 47 $ 34,207 $ — Single and multi-family 2 — 437 439 4,726 125,672 — Other commercial real estate 1,555 — 765 2,320 30,047 530,215 — Total 1,557 — 1,202 2,759 34,820 690,094 — Commercial and industrial loans: Total 1,850 15 1,262 3,127 3,369 153,936 24 Residential mortgages: 1-4 family 321 343 2,015 2,679 7,283 297,355 443 Construction — — — — — 804 — Total 321 343 2,015 2,679 7,283 298,159 443 Consumer loans: Home equity 753 — 870 1,623 957 80,279 353 Auto and other 542 314 1,686 2,542 387 106,012 791 Total 1,295 314 2,556 4,165 1,344 186,291 1,144 Total $ 5,023 $ 672 $ 7,035 $ 12,730 $ 46,816 $ 1,328,480 $ 1,611
Summary of Information Pertaining to Non-Accrual Loans	The following is summary information pertaining to non-accrual loans at September 30, 2017 and December 31, 2016: September 30, 2017 December 31, 2016 (In thousands) Business Acquired Total Business Acquired Total Commercial real estate: Construction $ — $ — $ — $ — $ — $ — Single and multi-family 163 215 378 469 437 906 Other commercial real estate 4,369 481 4,850 4,212 765 4,977 Total 4,532 696 5,228 4,681 1,202 5,883 Commercial and industrial loans: Total 8,451 1,147 9,598 6,285 1,155 7,440 Residential mortgages: 1-4 family 1,968 1,124 3,092 2,223 1,572 3,795 Construction — — — — — — Total 1,968 1,124 3,092 2,223 1,572 3,795 Consumer loans: Home equity 1,644 1,220 2,864 2,675 517 3,192 Auto and other 1,084 402 1,486 952 895 1,847 Total 2,728 1,622 4,350 3,627 1,412 5,039 Total non-accrual loans $ 17,679 $ 4,589 $ 22,268 $ 16,816 $ 5,341 $ 22,157 _______________________________________ (1) At quarter end September 30, 2017 , acquired credit impaired loans accounted for $83 thousand of loans greater than 90 days past due that are not presented in the above table. (2) At December 31, 2016, acquired credit impaired loans accounted for $83 thousand of loans greater than 90 days past due that are not presented in the above table.
Schedule of Loans Evaluated for Impairment	Loans evaluated for impairment as of September 30, 2017 and December 31, 2016 were as follows: Business Activities Loans (In thousands) Commercial Commercial and Residential Consumer Total September 30, 2017 Loans receivable: Balance at end of period Individually evaluated for impairment $ 34,064 $ 10,164 $ 2,205 $ 1,860 $ 48,293 Collectively evaluated for impairment 2,035,921 1,144,824 1,721,888 890,189 5,792,822 Total $ 2,069,985 $ 1,154,988 $ 1,724,093 $ 892,049 $ 5,841,115 Business Activities Loans (In thousands) Commercial Commercial and Residential Consumer Total December 31, 2016 Loans receivable: Balance at end of year Individually evaluated for impairment $ 25,549 $ 5,705 $ 2,775 $ 2,703 $ 36,732 Collectively evaluated for impairment 1,900,795 902,397 1,592,197 789,186 5,184,575 Total $ 1,926,344 $ 908,102 $ 1,594,972 $ 791,889 $ 5,221,307 Acquired Loans (In thousands) Commercial Commercial and Residential Consumer Total September 30, 2017 Loans receivable: Balance at end of Period Individually evaluated for impairment $ 2,770 $ 592 $ 475 $ 950 $ 4,787 Purchased credit-impaired loans 22,247 1,497 7,167 1,288 32,199 Collectively evaluated for impairment 576,235 97,870 251,391 143,809 1,069,305 Total $ 601,252 $ 99,959 $ 259,033 $ 146,047 $ 1,106,291 Acquired Loans (In thousands) Commercial Commercial and Residential Consumer Total December 31, 2016 Loans receivable: Balance at end of year Individually evaluated for impairment $ 4,256 $ 635 $ 308 $ 406 $ 5,605 Purchased credit-impaired loans 34,820 3,369 7,283 1,344 46,816 Collectively evaluated for impairment 651,018 149,932 290,568 184,541 1,276,059 Total $ 690,094 $ 153,936 $ 298,159 $ 186,291 $ 1,328,480
Summary of Impaired Loans	The following is a summary of impaired loans at September 30, 2017 and December 31, 2016: Business Activities Loans September 30, 2017 (In thousands) Recorded Investment Unpaid Principal Related Allowance With no related allowance: Commercial real estate - single and multifamily $ — $ — $ — Other commercial real estate loans 19,005 19,005 — Commercial and industrial loans 2,043 2,043 — Residential mortgages - 1-4 family 1,033 1,033 — Consumer - home equity 769 769 — Consumer - other — — — With an allowance recorded: Commercial real estate - single and multifamily $ 162 $ 163 $ 1 Other commercial real estate loans 14,758 14,896 138 Commercial and industrial loans 7,842 8,121 279 Residential mortgages - 1-4 family 1,036 1,172 136 Consumer - home equity 1,052 1,091 39 Consumer - other — — — Total Commercial real estate $ 33,925 $ 34,064 $ 139 Commercial and industrial loans 9,885 10,164 279 Residential mortgages 2,069 2,205 136 Consumer 1,821 1,860 39 Total impaired loans $ 47,700 $ 48,293 $ 593 Business Activities Loans December 31, 2016 (In thousands) Recorded Investment Unpaid Principal Related Allowance With no related allowance: Commercial real estate - single and multifamily $ — $ — $ — Other commercial real estate loans 18,905 18,905 — Commercial and industrial loans 382 382 — Residential mortgages - 1-4 family 2,101 2,101 — Consumer - home equity 1,605 1,605 — Consumer - other — — — With an allowance recorded: Commercial real estate - single and multifamily $ 179 $ 181 $ 2 Other commercial real estate loans 6,306 6,462 156 Commercial and industrial loans 5,060 5,324 264 Residential mortgages - 1-4 family 538 674 136 Consumer - home equity 942 1,098 156 Consumer - other — — — Total Commercial real estate $ 25,390 $ 25,548 $ 158 Commercial and industrial loans 5,442 5,706 264 Residential mortgages 2,639 2,775 136 Consumer 2,547 2,703 156 Total impaired loans $ 36,018 $ 36,732 $ 714 Acquired Loans September 30, 2017 (In thousands) Recorded Investment Unpaid Principal Related Allowance With no related allowance: Commercial real estate - single and multifamily $ 216 $ 216 $ — Other commercial real estate loans 195 195 — Commercial and industrial loans 287 287 — Residential mortgages - 1-4 family 165 165 — Consumer - home equity 581 581 — Consumer - other — — — With an allowance recorded: Commercial real estate - single and multifamily $ 871 $ 892 $ 21 Other commercial real estate loans 1,442 1,467 25 Commercial and industrial loans 303 305 2 Residential mortgages - 1-4 family 291 310 19 Consumer - home equity 325 369 44 Total x Commercial real estate $ 2,724 $ 2,770 $ 46 Commercial and industrial loans 590 592 2 Residential mortgages 456 475 19 Consumer 906 950 44 Total impaired loans $ 4,676 $ 4,787 $ 111 Acquired Loans December 31, 2016 (In thousands) Recorded Investment Unpaid Principal Related Allowance With no related allowance: Commercial real estate - single and multifamily $ — $ — $ — Other commercial real estate loans 547 547 — Commercial and industrial loans — — — Residential mortgages - 1-4 family 208 208 — With an allowance recorded: Commercial real estate - single and multifamily $ 1,250 $ 1,358 $ 108 Other commercial real estate loans 2,209 2,351 142 Commercial and industrial loans 576 635 59 Residential mortgages - 1-4 family 89 100 11 Consumer - home equity 292 406 114 Total Commercial real estate $ 4,006 $ 4,256 $ 250 Commercial and industrial loans 576 635 59 Residential mortgages 297 308 11 Consumer 292 406 114 Total impaired loans $ 5,171 $ 5,605 $ 434
Summary of the Average Recorded Investment and Interest Income Recognized on Impaired Loans	The following is a summary of the average recorded investment and interest income recognized on impaired loans as of September 30, 2017 and 2016: Business Activities Loans Nine Months Ended September 30, 2017 Nine Months Ended September 30, 2016 (In thousands) Average Recorded Cash Basis Interest Average Recorded Cash Basis Interest With no related allowance: Commercial real estate - single and multifamily $ 84 $ — $ 48 $ 1 Other commercial real estate loans 21,132 934 2,624 111 Commercial and industrial loans 1,825 69 805 26 Residential mortgages - 1-4 family 1,391 29 2,309 51 Consumer - home equity 1,301 26 693 5 Consumer - other — — 1 — With an allowance recorded: Commercial real estate - single and multifamily $ 172 $ 10 $ — $ — Other commercial real estate loans 10,553 363 10,266 351 Commercial and industrial loans 6,493 354 4,609 154 Residential mortgages - 1-4 family 1,187 38 684 21 Consumer - home equity 1,094 32 999 26 Consumer - other — — 104 3 Total Commercial real estate $ 31,941 $ 1,307 $ 12,938 $ 463 Commercial and industrial loans 8,318 423 5,414 180 Residential mortgages 2,578 67 2,993 72 Consumer loans 2,395 58 1,797 34 Total impaired loans $ 45,232 $ 1,855 $ 23,142 $ 749 Acquired Loans Nine Months Ended September 30, 2017 Nine Months Ended September 30, 2016 (In thousands) Average Recorded Cash Basis Interest Average Recorded Cash Basis Interest With no related allowance: Commercial real estate - single and multifamily $ 424 $ 79 $ — $ — Other commercial real estate loans 483 73 546 20 Commercial and Industrial loans 319 4 191 1 Residential mortgages - 1-4 family 170 7 321 9 Consumer - home equity 567 — — — Consumer - other — — 140 1 With an allowance recorded: Commercial real estate - single and multifamily $ 904 $ 36 $ 942 $ 37 Other commercial real estate loans 1,481 56 2,606 127 Commercial and Industrial loans 332 29 404 10 Residential mortgages - 1-4 family 319 12 117 4 Consumer - home equity 387 13 356 13 Consumer - other — — — — Total Other commercial real estate loans $ 3,292 $ 244 $ 4,094 $ 184 Commercial and industrial loans 651 33 595 11 Residential mortgages 489 19 438 13 Consumer loans 954 13 496 14 Total impaired loans $ 5,386 $ 309 $ 5,623 $ 222
Schedule of Recorded Investment and Number of Modifications for TDRs Identified During the Period	The following tables include the recorded investment and number of modifications identified during the three and nine months ended September 30, 2017 . The table includes the recorded investment in the loans prior to a modification and also the recorded investment in the loans after the loans were restructured. The modifications for the three and nine months ended September 30, 2017 and 2016 were attributable to interest rate concessions, principal concessions, maturity date extensions, modified payment terms, reamortization, and accelerated maturity. Three Months Ended September 30, 2017 (Dollars in thousands) Number of Pre-Modification Post-Modification Troubled Debt Restructurings Commercial - Other — — — Commercial and industrial 3 1,654 1,654 Residential - 1-4 Family — — — Consumer - Home Equity — — — Total 3 $ 1,654 $ 1,654 Nine Months Ended September 30, 2017 (Dollars in thousands) Number of Pre-Modification Post-Modification Troubled Debt Restructurings Commercial - Other 15 $ 13,445 $ 11,718 Commercial and industrial 8 3,471 3,471 Residential - 1-4 Family 2 205 188 Consumer - Home Equity 1 53 53 Total 26 $ 17,174 $ 15,430 Three Months Ended September 30, 2016 (Dollars in thousands) Number of Pre-Modification Post-Modification Troubled Debt Restructurings Commercial and industrial 2 404 404 Residential - 1-4 Family 2 5 5 Total 4 $ 409 $ 409 Nine Months Ended September 30, 2016 (Dollars in thousands) Number of Pre-Modification Post-Modification Troubled Debt Restructurings Commercial - Other 2 $ 1,049 $ 1,049 Commercial and industrial 4 555 555 Residential - 1-4 Family 2 5 5 Consumer - Home Equity 1 117 117 Total 9 $ 1,726 $ 1,726 The following table discloses the recorded investments and numbers of modifications for TDRs where a concession has been made, that then defaulted in the respective reporting period. For the three months ended September 30, 2017, there were no loans that were restructured that had subsequently defaulted during the period. For the nine months ended September 30, 2017, there were two loans that were restructured that had subsequently defaulted during the period. Modifications that Subsequently Defaulted Three Months Ended September 30, 2017 (Dollars in thousands) Number of Contracts Recorded Investment Troubled Debt Restructurings Commercial - Other — $ — Commercial and industrial — $ — Modifications that Subsequently Defaulted Nine Months Ended September 30, 2017 (Dollars in thousands) Number of Contracts Recorded Investment Troubled Debt Restructurings Commercial - Other 1 $ 113 Commercial and industrial 1 $ 101
Schedule of TDR Activity	The following table presents the Company’s TDR activity for the three and nine months ended September 30, 2017 and 2016: Three Months Ended September 30, (In thousands) 2017 2016 Balance at beginning of the period $ 44,556 $ 22,122 Principal payments (373 ) (932 ) TDR status change (1) — — Other reductions/increases (2) (1,939 ) — Newly identified TDRs 1,654 409 Balance at end of the period $ 43,898 $ 21,599 Nine Months Ended September 30, (In thousands) 2017 2016 Balance at beginning of the period $ 33,829 $ 22,048 Principal payments (1,527 ) (2,041 ) TDR status change (1) — 2,236 Other reductions/increases (2) (3,834 ) (2,370 ) Newly identified TDRs 15,430 1,726 Balance at end of the period $ 43,898 $ 21,599 _________________________________ (1) TDR status change classification represents TDR loans with a specified interest rate equal to or greater than the rate that the Company was willing to accept at the time of the restructuring for a new loan with comparable risk and the loan was on current payment status and not impaired based on the terms specified by the restructuring agreement. (2) Other reductions classification consists of transfer to other real estate owned and charge-offs and advances to loans.

LOAN LOSS ALLOWANCE (Tables)

LOAN LOSS ALLOWANCE (Tables)	9 Months Ended
	Sep. 30, 2017
Receivables [Abstract]
Schedule of Activity in the Allowance for Loan Losses	Activity in the allowance for loan losses for the three and nine months ended September 30, 2017 and 2016 was as follows: At or for the three months ended September 30, 2017 Business Activities Loans (In thousands) Commercial real estate Commercial and industrial loans Residential mortgages Consumer Total Balance at beginning of period $ 15,972 $ 12,588 $ 8,114 $ 6,221 $ 42,895 Charged-off loans 1,367 606 42 1,352 3,367 Recoveries on charged-off loans 14 37 241 39 331 Provision/(releases) for loan losses 1,210 1,952 241 1,473 4,876 Balance at end of period $ 15,829 $ 13,971 $ 8,554 $ 6,381 $ 44,735 Individually evaluated for impairment 139 279 136 39 593 Collectively evaluated for impairment 15,690 13,692 8,418 6,342 44,142 Total $ 15,829 $ 13,971 $ 8,554 $ 6,381 $ 44,735 At or for the nine months ended September 30, 2017 Business Activities Loans (In thousands) Commercial real estate Commercial and industrial loans Residential mortgages Consumer Total Balance at beginning of period $ 16,499 $ 9,446 $ 7,800 $ 5,484 $ 39,229 Charged-off loans 2,883 2,457 555 2,670 8,565 Recoveries on charged-off loans 71 108 270 211 660 Provision/(releases) for loan losses 2,142 6,874 1,039 3,356 13,411 Balance at end of period $ 15,829 $ 13,971 $ 8,554 $ 6,381 $ 44,735 Individually evaluated for impairment 139 279 136 39 593 Collectively evaluated for impairment 15,690 13,692 8,418 6,342 44,142 Total $ 15,829 $ 13,971 $ 8,554 $ 6,381 $ 44,735 At or for the three months ended September 30, 2016 Business Activities Loans (In thousands) Commercial real estate Commercial and industrial loans Residential mortgages Consumer Total Balance at beginning of period $ 16,732 $ 8,216 $ 7,453 $ 4,723 $ 37,124 Charged-off loans — 1,599 253 434 2,286 Recoveries on charged-off loans 114 37 96 61 308 Provision/(releases) for loan losses 620 1,831 88 936 3,475 Balance at end of period $ 17,466 $ 8,485 $ 7,384 $ 5,286 $ 38,621 Individually evaluated for impairment 190 194 89 165 638 Collectively evaluated for impairment 17,276 8,291 7,295 5,121 37,983 Total $ 17,466 $ 8,485 $ 7,384 $ 5,286 $ 38,621 At or for the nine months ended September 30, 2016 Business Activities Loans (In thousands) Commercial real estate Commercial and industrial loans Residential mortgages Consumer Total Balance at beginning of period $ 14,610 $ 7,367 $ 7,612 $ 4,985 $ 34,574 Charged-off loans 1,578 4,145 1,340 1,175 8,238 Recoveries on charged-off loans 242 114 101 183 640 Provision/(releases) for loan losses 4,192 5,149 1,011 1,293 11,645 Balance at end of period $ 17,466 $ 8,485 $ 7,384 $ 5,286 $ 38,621 Individually evaluated for impairment 190 194 89 165 638 Collectively evaluated for impairment 17,276 8,291 7,295 5,121 37,983 Total $ 17,466 $ 8,485 $ 7,384 $ 5,286 $ 38,621 At or for the three months ended September 30, 2017 Acquired Loans (In thousands) Commercial real estate Commercial and industrial loans Residential mortgages Consumer Total Balance at beginning of period $ 2,356 $ 1,014 $ 690 $ 404 $ 4,464 Charged-off loans 95 153 70 111 429 Recoveries on charged-off loans 22 150 1 37 210 Provision for loan losses 109 (149 ) 49 15 24 Balance at end of period $ 2,392 $ 862 $ 670 $ 345 $ 4,269 Individually evaluated for impairment 46 2 19 44 111 Purchased credit-impaired loans — — — — — Collectively evaluated for impairment 2,346 860 651 301 4,158 Total $ 2,392 $ 862 $ 670 $ 345 $ 4,269 At or for the nine months ended September 30, 2017 Acquired Loans (In thousands) Commercial real estate Commercial and industrial loans Residential mortgages Consumer Total Balance at beginning of period $ 2,303 $ 1,164 $ 766 $ 536 $ 4,769 Charged-off loans 765 634 285 601 2,285 Recoveries on charged-off loans 44 151 39 78 312 Provision for loan losses 810 181 150 332 1,473 Balance at end of period $ 2,392 $ 862 $ 670 $ 345 $ 4,269 Individually evaluated for impairment 46 2 19 44 111 Purchased credit-impaired loans — — — — — Collectively evaluated for impairment 2,346 860 651 301 4,158 Total $ 2,392 $ 862 $ 670 $ 345 $ 4,269 At or for the three months ended September 30, 2016 Acquired Loans (In thousands) Commercial real estate Commercial and industrial loans Residential mortgages Consumer Total Balance at beginning of period $ 2,140 $ 776 $ 881 $ 476 $ 4,273 Charged-off loans 662 84 332 77 1,155 Recoveries on charged-off loans — 37 37 33 107 Provision for loan losses 907 210 111 31 1,259 Balance at end of period $ 2,385 $ 939 $ 697 $ 463 $ 4,484 Individually evaluated for impairment 704 121 12 135 972 Purchased credit-impaired loans — — — — — Collectively evaluated for impairment 1,681 818 685 328 3,512 Total $ 2,385 $ 939 $ 697 $ 463 $ 4,484 At or for the nine months ended September 30, 2016 Acquired Loans (In thousands) Commercial real estate Commercial and industrial loans Residential mortgages Consumer Total Balance at beginning of period $ 1,903 $ 1,330 $ 976 $ 525 $ 4,734 Charged-off loans 788 359 696 457 2,300 Recoveries on charged-off loans — 213 141 79 433 Provision for loan losses 1,270 (245 ) 276 316 1,617 Balance at end of period $ 2,385 $ 939 $ 697 $ 463 $ 4,484 Individually evaluated for impairment 704 121 12 135 972 Purchased credit-impaired loans — — — — — Collectively evaluated for impairment 1,681 818 685 328 3,512 Total $ 2,385 $ 939 $ 697 $ 463 $ 4,484
Schedule of Loans by Risk Rating	The following tables present the Company’s loans by risk rating at September 30, 2017 and December 31, 2016: Business Activities Loans Commercial Real Estate Credit Risk Profile by Creditworthiness Category Construction Single and multi-family Other Total commercial real estate (In thousands) September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 Grade: Pass $ 265,059 $ 253,302 $ 339,846 $ 189,310 $ 1,419,153 $ 1,434,762 $ 2,024,058 $ 1,877,374 Special mention — — 529 334 12,604 5,827 13,133 6,161 Substandard — — 2,051 2,175 30,743 40,598 32,794 42,773 Doubtful — — — — — 36 — 36 Total $ 265,059 $ 253,302 $ 342,426 $ 191,819 $ 1,462,500 $ 1,481,223 $ 2,069,985 $ 1,926,344 Commercial and Industrial Loans Credit Risk Profile by Creditworthiness Category Total comm. and industrial loans (In thousands) September 30, 2017 December 31, 2016 Grade: Pass $ 1,136,498 $ 890,974 Special mention 2,522 123 Substandard 12,981 13,825 Doubtful 2,987 3,180 Total $ 1,154,988 $ 908,102 Residential Mortgages Credit Risk Profile by Internally Assigned Grade 1-4 family Construction Total residential mortgages (In thousands) September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 Grade: Pass $ 1,713,671 $ 1,578,913 $ 6,933 $ 11,178 $ 1,720,604 $ 1,590,091 Special mention 1,396 701 — — 1,396 701 Substandard 2,093 4,179 — — 2,093 4,179 Total $ 1,717,160 $ 1,583,793 $ 6,933 $ 11,178 $ 1,724,093 $ 1,594,971 Consumer Loans Credit Risk Profile Based on Payment Activity Home equity Auto and other Total consumer loans (In thousands) September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 Performing $ 288,500 $ 310,846 $ 600,821 $ 477,416 $ 889,321 $ 788,262 Nonperforming 1,644 2,675 1,084 952 2,728 3,627 Total $ 290,144 $ 313,521 $ 601,905 $ 478,368 $ 892,049 $ 791,889 Acquired Loans Commercial Real Estate Credit Risk Profile by Creditworthiness Category Construction Single and multi-family Other Total commercial real estate (In thousands) September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 Grade: Pass $ 17,221 $ 33,461 $ 81,935 $ 119,414 $ 454,081 $ 496,562 $ 553,237 $ 649,437 Special mention 570 — 607 907 18,626 1,622 19,803 2,529 Substandard 699 746 2,126 5,351 25,387 32,031 28,212 38,128 Total $ 18,490 $ 34,207 $ 84,668 $ 125,672 $ 498,094 $ 530,215 $ 601,252 $ 690,094 Commercial and Industrial Loans Credit Risk Profile by Creditworthiness Category Total comm. and industrial loans (In thousands) September 30, 2017 December 31, 2016 Grade: Pass $ 95,098 $ 147,102 Special mention 51 1,260 Substandard 4,810 5,574 Total $ 99,959 $ 153,936 Residential Mortgages Credit Risk Profile by Internally Assigned Grade 1-4 family Construction Total residential mortgages (In thousands) September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 Grade: Pass $ 253,414 $ 294,983 $ 244 $ 804 $ 253,658 $ 295,787 Special mention 398 343 — — 398 343 Substandard 4,977 2,029 — — 4,977 2,029 Total $ 258,789 $ 297,355 $ 244 $ 804 $ 259,033 $ 298,159 Consumer Loans Credit Risk Profile Based on Payment Activity Home equity Auto and other Total consumer loans (In thousands) September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 Performing $ 94,526 $ 79,762 $ 49,900 $ 105,117 $ 144,426 $ 184,879 Nonperforming 1,220 517 401 895 1,621 1,412 Total $ 95,746 $ 80,279 $ 50,301 $ 106,012 $ 146,047 $ 186,291
Summary of Information About Total Loans Rated Special Mention or Lower	The following table summarizes information about total loans rated Special Mention or lower as of September 30, 2017 and December 31, 2016. The table below includes consumer loans that are special mention and substandard accruing that are classified in the above table as performing based on payment activity. September 30, 2017 December 31, 2016 (In thousands) Business Acquired Loans Total Business Acquired Loans Total Non-Accrual $ 17,679 $ 4,672 $ 22,351 $ 16,816 $ 5,424 $ 22,240 Substandard Accruing 36,162 35,089 71,251 51,125 44,177 95,302 Total Classified 53,841 39,761 93,602 67,941 49,601 117,542 Special Mention 17,699 20,284 37,983 7,479 4,323 11,802 Total Criticized $ 71,540 $ 60,045 $ 131,585 $ 75,420 $ 53,924 $ 129,344

DEPOSITS (Tables)

DEPOSITS (Tables)	9 Months Ended
	Sep. 30, 2017
Deposits [Abstract]
Summary of Time Deposits	A summary of time deposits is as follows: (In thousands) September 30, December 31, Time less than $250,000 $ 2,200,338 $ 2,015,332 Time $250,000 or more 373,285 318,211 Total time deposits $ 2,573,623 $ 2,333,543

BORROWED FUNDS (Tables)

BORROWED FUNDS (Tables)	9 Months Ended
	Sep. 30, 2017
Debt Disclosure [Abstract]
Schedule of Borrowed Funds	Borrowed funds at September 30, 2017 and December 31, 2016 are summarized, as follows: September 30, 2017 December 31, 2016 Weighted Weighted Average Average (Dollars in thousands) Principal Rate Principal Rate Short-term borrowings: Advances from the FHLB $ 1,061,300 1.27 % $ 1,072,044 0.71 % Other borrowings — — 10,000 2.42 Total short-term borrowings: 1,061,300 1.27 1,082,044 0.72 Long-term borrowings: Advances from the FHLB and other borrowings 338,054 1.49 142,792 1.53 Subordinated borrowings 73,831 7.00 73,697 7.00 Junior subordinated borrowings 15,464 3.16 15,464 2.77 Total long-term borrowings: 427,349 2.50 231,953 3.35 Total $ 1,488,649 1.63 % $ 1,313,997 1.19 %
Summary of Maturities of FHLBB Advances	A summary of maturities of FHLB advances as of September 30, 2017 is as follows: September 30, 2017 Weighted Average (In thousands, except rates) Principal Rate Fixed rate advances maturing: 2017 $ 1,018,565 1.28 % 2018 218,836 1.28 2019 150,000 1.64 2020 4,464 1.94 2021 and beyond 7,489 2.69 Total FHLB advances $ 1,399,354 1.33 %

CAPITAL RATIOS AND SHAREHOLDE29

CAPITAL RATIOS AND SHAREHOLDERS' EQUITY (Tables)	9 Months Ended
	Sep. 30, 2017
Stockholders' Equity Note [Abstract]
Schedule of Actual and Required Capital Ratios	The actual and required capital ratios were as follows: September 30, Regulatory December 31, Regulatory Company (consolidated) Total capital to risk weighted assets 14.3 % 10.0 % 11.9 % 10.0 % Common equity tier 1 capital to risk weighted assets 12.3 6.5 9.9 6.5 Tier 1 capital to risk weighted assets 12.5 8.0 10.1 8.0 Tier 1 capital to average assets 9.5 5.0 7.9 5.0 Bank Total capital to risk weighted assets 11.7 % 10.0 % 11.2 % 10.0 % Common equity tier 1 capital to risk weighted assets 10.4 6.5 10.0 6.5 Tier 1 capital to risk weighted assets 10.4 8.0 10.0 8.0 Tier 1 capital to average assets 8.0 5.0 7.8 5.0
Schedule of Components of Accumulated Other Comprehensive Income	Components of accumulated other comprehensive income is as follows: (In thousands) September 30, December 31, Other accumulated comprehensive income, before tax: Net unrealized holding gain on AFS securities $ 21,132 $ 25,176 Net unrealized loss on cash flow hedging derivatives — (6,573 ) Net unrealized holding loss on pension plans (2,954 ) (2,954 ) Income taxes related to items of accumulated other comprehensive income: Net unrealized holding gain on AFS securities (8,155 ) (9,636 ) Net unrealized loss on cash flow hedging derivatives — 2,589 Net unrealized holding loss on pension plans 1,164 1,164 Accumulated other comprehensive income $ 11,187 $ 9,766
Schedule of Components of Other Comprehensive Income	The following table presents the components of other comprehensive income for the three and nine months ended September 30, 2017 and 2016 : (In thousands) Before Tax Tax Effect Net of Tax Three Months Ended September 30, 2017 Net unrealized holding gain on AFS securities: x Net unrealized gains arising during the period $ 1,460 $ (605 ) $ 855 Less: reclassification adjustment for (losses) realized in net income (1 ) — (1 ) Net unrealized holding gain on AFS securities 1,461 (605 ) 856 Net unrealized gain on cash flow hedging derivatives: Net unrealized (loss) arising during the period — — — Less: reclassification adjustment for (losses) realized in net income — — — Net unrealized gain on cash flow hedging derivatives — — — Other comprehensive income $ 1,461 $ (605 ) $ 856 Three Months Ended September 30, 2016 Net unrealized holding (loss) on AFS securities: Net unrealized (losses) arising during the period $ (5,576 ) $ 2,190 $ (3,386 ) Less: reclassification adjustment for gains realized in net income 78 (28 ) 50 Net unrealized holding (loss) on AFS securities (5,654 ) 2,218 (3,436 ) Net unrealized gain on cash flow hedging derivatives: Net unrealized gain arising during the period 1,363 (547 ) 816 Less: reclassification adjustment for (losses) realized in net income (1,367 ) 549 (818 ) Net unrealized gain on cash flow hedging derivatives 2,730 (1,096 ) 1,634 Other comprehensive (loss) $ (2,924 ) $ 1,122 $ (1,802 ) (In thousands) Before Tax Tax Effect Net of Tax Nine Months Ended September 30, 2017 Net unrealized holding (loss) on AFS securities: x Net unrealized gains arising during the period $ 8,524 $ (3,232 ) $ 5,292 Less: reclassification adjustment for gains realized in net income 12,568 (4,713 ) 7,855 Net unrealized holding (loss) on AFS securities (4,044 ) 1,481 (2,563 ) Net unrealized gain on cash flow hedging derivatives: Net unrealized (loss) arising during the period (449 ) 180 (269 ) Less: reclassification adjustment for (losses) realized in net income (7,022 ) 2,769 (4,253 ) Net unrealized gain on cash flow hedging derivatives 6,573 (2,589 ) 3,984 Other comprehensive income $ 2,529 $ (1,108 ) $ 1,421 Nine Months Ended September 30, 2016 Net unrealized holding gain on AFS securities: Net unrealized gains arising during the period $ 21,740 $ (8,366 ) $ 13,374 Less: reclassification adjustment for gains realized in net income 101 (36 ) 65 Net unrealized holding gain on AFS securities 21,639 (8,330 ) 13,309 Net unrealized (loss) on cash flow hedging derivatives: Net unrealized (loss) arising during the period (5,322 ) 2,136 (3,186 ) Less: reclassification adjustment for (losses) realized in net income (2,662 ) 1,069 (1,593 ) Net unrealized (loss) on cash flow hedging derivatives (2,660 ) 1,067 (1,593 ) Other comprehensive income $ 18,979 $ (7,263 ) $ 11,716
Schedule of Gross Changes in Each Component of Accumulated Other Comprehensive Income	The following table presents the changes in each component of accumulated other comprehensive income (loss), for the three and nine months ended September 30, 2017 and 2016 : (In thousands) Net unrealized holding gain on AFS Securities Net loss on effective cash flow hedging derivatives Net unrealized holding loss on pension plans Total Three Months Ended September 30, 2017 Balance at Beginning of Period $ 12,121 $ — $ (1,790 ) $ 10,331 Other comprehensive gain before reclassifications 855 — — 855 Less: amounts reclassified from accumulated other comprehensive income (loss) (1 ) — — (1 ) Total other comprehensive income 856 — — 856 Balance at End of Period $ 12,977 $ — $ (1,790 ) $ 11,187 Three Months Ended September 30, 2016 Balance at Beginning of Period $ 20,625 $ (8,335 ) $ (2,077 ) $ 10,213 Other comprehensive (loss) gain before reclassifications (3,386 ) 816 — (2,570 ) Less: amounts reclassified from accumulated other comprehensive income (loss) 50 (818 ) — (768 ) Total other comprehensive (loss) income (3,436 ) 1,634 — (1,802 ) Balance at End of Period $ 17,189 $ (6,701 ) $ (2,077 ) $ 8,411 (In thousands) Net unrealized holding gain on AFS Securities Net loss on effective cash flow hedging derivatives Net unrealized holding loss on pension plans Total Nine Months Ended September 30, 2017 Balance at Beginning of Period $ 15,540 $ (3,984 ) $ (1,790 ) $ 9,766 Other comprehensive gain (loss) before reclassifications 5,292 (269 ) — 5,023 Less: amounts reclassified from accumulated other comprehensive income (loss) 7,855 (4,253 ) — 3,602 Total other comprehensive (loss) income (2,563 ) 3,984 — 1,421 Balance at End of Period $ 12,977 $ — $ (1,790 ) $ 11,187 Nine Months Ended September 30, 2016 Balance at Beginning of Period $ 3,880 $ (5,108 ) $ (2,077 ) $ (3,305 ) Other comprehensive gain (loss) before reclassifications 13,374 (3,186 ) — 10,188 Less: amounts reclassified from accumulated other comprehensive income (loss) 65 (1,593 ) — (1,528 ) Total other comprehensive income (loss) 13,309 (1,593 ) — 11,716 Balance at End of Period $ 17,189 $ (6,701 ) $ (2,077 ) $ 8,411
Schedule of Amounts Reclassified Out of Each Component of Accumulated Other Comprehensive Income	The following table presents the amounts reclassified out of each component of accumulated other comprehensive income (loss) for the three and nine months ended September 30, 2017 and 2016 : Affected Line Item in the Three Months Ended September 30, Statement where Net Income (In thousands) 2017 2016 is Presented Realized (losses)/gains on AFS securities: $ (1 ) $ 78 Non-interest income — (28 ) Tax expense (1 ) 50 Net of tax Realized (losses) on cash flow hedging derivatives: — (1,367 ) Non-interest income — 549 Tax expense — (818 ) Net of tax Total reclassifications for the period $ (1 ) $ (768 ) Net of tax Affected Line Item in the Nine Months Ended September 30, Statement where Net Income (In thousands) 2017 2016 is Presented Realized gains on AFS securities: $ 12,568 $ 101 Non-interest income (4,713 ) (36 ) Tax expense 7,855 65 Net of tax Realized (losses) on cash flow hedging derivatives: (393 ) — Interest expense (6,629 ) — Non-interest income — (2,662 ) Non-interest expense 2,769 1,069 Tax benefit (4,253 ) (1,593 ) Net of tax Total reclassifications for the period $ 3,602 $ (1,528 ) Net of tax

EARNINGS PER SHARE (Tables)

EARNINGS PER SHARE (Tables)	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Schedule of Earnings Per Share	Earnings per share have been computed based on the following (average diluted shares outstanding are calculated using the treasury stock method): Three Months Ended September 30, Nine Months Ended September 30, (In thousands, except per share data) 2017 2016 2017 2016 Net income $ 22,903 $ 16,381 $ 58,057 $ 48,339 Average number of common shares issued 41,370 32,273 38,958 32,216 Less: average number of treasury shares 947 1,137 970 1,117 Less: average number of unvested stock award shares 439 515 441 515 Average number of basic common shares outstanding 39,984 30,621 37,547 30,584 Plus: dilutive effect of unvested stock award shares 116 131 116 115 Plus: dilutive effect of stock options outstanding 45 59 45 58 Average number of diluted common shares outstanding 40,145 30,811 37,708 30,757 Earnings per share: Basic $ 0.57 $ 0.53 $ 1.55 $ 1.58 Diluted $ 0.57 $ 0.53 $ 1.54 $ 1.57

STOCK-BASED COMPENSATION PLANS

STOCK-BASED COMPENSATION PLANS (Tables)	9 Months Ended
	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Activity in the Stock Award and Stock Option Plans	A combined summary of activity in the Company’s stock award and stock option plans for the nine months ended September 30, 2017 is presented in the following table: Non-Vested Stock Awards Outstanding Stock Options Outstanding (Shares in thousands) Number of Shares Weighted-Average Grant Date Fair Value Number of Shares Weighted-Average Exercise Price December 31, 2016 448 $ 26.28 109 $ 15.72 Granted 156 35.60 — — Stock options exercised — — (11 ) 14.47 Stock awards vested (162 ) 25.56 — — Forfeited (10 ) 29.26 — — Expired — — (10 ) 33.46 September 30, 2017 432 $ 29.64 88 $ 13.86 Exercisable options at September 30, 2017 88 $ 13.86

DERIVATIVE INSTRUMENTS AND HE32

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Tables)	9 Months Ended
	Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Interest Rate Swap Agreements and Non-Hedging Derivative Assets and Liabilities	Information about derivative assets and liabilities at September 30, 2017 , follows: Weighted Weighted Average Rate Estimated Notional Average Contract Fair Value Amount Maturity Received pay rate Asset (Liability) (In thousands) (In years) (In thousands) Cash flow hedges: Interest rate swaps on FHLB borrowings $ — 0 — % — % $ — Total cash flow hedges — — Economic hedges: Interest rate swap on tax advantaged economic development bond 10,916 12.2 1.60 % 5.09 % (1,827 ) Interest rate swaps on loans with commercial loan customers 796,914 6.1 3.09 % 4.19 % (8,576 ) Reverse interest rate swaps on loans with commercial loan customers 796,914 6.1 4.19 % 3.09 % 8,572 Risk participation agreements with dealer banks 117,067 9.4 12 Forward sale commitments 459,203 0.2 500 Total economic hedges 2,181,014 (1,319 ) Non-hedging derivatives: Commitments to lend 310,327 0.2 6,455 Total non-hedging derivatives 310,327 6,455 Total $ 2,491,341 $ 5,136 Information about derivative assets and liabilities at December 31, 2016 , follows: Weighted Weighted Average Rate Estimated Notional Average Contract Fair Value Amount Maturity Received pay rate Asset (Liability) (In thousands) (In years) (In thousands) Cash flow hedges: Interest rate swaps on FHLB borrowings $ 300,000 2.3 0.63 % 2.29 % $ (6,573 ) Total cash flow hedges 300,000 (6,573 ) Economic hedges: Interest rate swap on tax advantaged economic development bond 11,386 12.9 0.98 % 5.09 % (2,021 ) Interest rate swaps on loans with commercial loan customers 668,541 6.2 2.43 % 4.21 % (6,752 ) Reverse interest rate swaps on loans with commercial loan customers 668,541 6.2 4.21 % 2.43 % 7,077 Risk participation agreements with dealer banks 83,360 11.6 5 Forward sale commitments 259,889 0.2 722 Total economic hedges 1,691,717 (969 ) Non-hedging derivatives: Commitments to lend 208,145 0.2 4,738 Total non-hedging derivatives 208,145 4,738 Total $ 2,199,862 $ (2,804 )
Schedule of Amounts Included in the Consolidated Statements of Income and in the Other Comprehensive Income Section of the Consolidated Statements of Comprehensive Income	Amounts included in the Consolidated Statements of Income and in the other comprehensive income section of the Consolidated Statements of Comprehensive Income (related to interest rate derivatives designated as hedges of cash flows), were as follows: Three Months Ended September 30, Nine Months Ended September 30, (In thousands) 2017 2016 2017 2016 Interest rate swaps on FHLB borrowings: Unrealized (loss) recognized in accumulated other comprehensive loss $ — $ 1,363 $ (449 ) $ (5,322 ) Less: reclassification of unrealized (loss) from accumulated other comprehensive income to interest expense — (1,367 ) (393 ) (2,662 ) Less: reclassification of unrealized (loss) from accumulated other comprehensive income to other non-interest expense — — (6,629 ) — Net tax (expense) benefit on items recognized in accumulated other comprehensive income — (1,096 ) (2,589 ) 1,067 Other comprehensive gain (loss) recorded in accumulated other comprehensive income, net of reclassification adjustments and tax effects $ — $ 1,634 $ 3,984 $ (1,593 )
Schedule of Amounts Included in the Consolidated Statements of Income Related to Economic Hedges and Non-Hedging Derivatives	Amounts included in the Consolidated Statements of Income related to economic hedges and non-hedging derivatives were as follows: Three Months Ended September 30, Nine Months Ended September 30, (In thousands) 2017 2016 2017 2016 Economic hedges Interest rate swap on industrial revenue bond: Unrealized gain (loss) recognized in other non-interest income $ 70 $ 29 $ 194 $ (802 ) Interest rate swaps on loans with commercial loan customers: Unrealized (loss) recognized in other non-interest income (142 ) 2,411 (1,824 ) (18,911 ) Reverse interest rate swaps on loans with commercial loan customers: Unrealized gain recognized in other non-interest income 142 (2,411 ) 1,824 18,911 (Unfavorable) Favorable change in credit valuation adjustment recognized in other non-interest income (53 ) (62 ) (329 ) (495 ) Risk participation agreements: Unrealized gain recognized in other non-interest income 2 (14 ) 7 102 Forward commitments: Unrealized gain (loss) recognized in other non-interest income 500 (582 ) 224 (1,898 ) Realized gain (loss) in other non-interest income (983 ) 109 (3,651 ) (224 ) Non-hedging derivatives Commitments to lend Unrealized gain recognized in other non-interest income $ 6,455 $ 1,574 $ 21,891 $ 3,635 Realized gain in other non-interest income 7,402 760 23,869 2,505
Schedule of Assets Subject to an Enforceable Master Netting Arrangement	Offsetting of Financial Assets and Derivative Assets Gross Amounts of Gross Amounts Offset in the Net Amounts of Assets Presented in the Gross Amounts Not Offset in the Statements of Condition Recognized Statements of Statements of Financial Cash (In thousands) Assets Condition Condition Instruments Collateral Received Net Amount December 31, 2016 Interest Rate Swap Agreements: Institutional counterparties $ 49 $ — $ 49 $ — $ — $ 49 Commercial counterparties 11,461 — 11,461 — — 11,461 Total $ 11,510 $ — $ 11,510 $ — $ — $ 11,510 Offsetting of Financial Assets and Derivative Assets Gross Amounts of Gross Amounts Offset in the Net Amounts of Assets Presented in the Gross Amounts Not Offset in the Statements of Condition Recognized Statements of Statements of Financial Cash (In thousands) Assets Condition Condition Instruments Collateral Received Net Amount September 30, 2017 Interest Rate Swap Agreements: Institutional counterparties $ 63 $ — $ 63 $ — $ — $ 63 Commercial counterparties 11,909 — 11,909 — — 11,909 Total $ 11,972 $ — $ 11,972 $ — $ — $ 11,972
Schedule of Liabilities Subject to an Enforceable Master Netting Arrangement	Offsetting of Financial Liabilities and Derivative Liabilities Gross Amounts of Gross Amounts Offset in the Net Amounts of Liabilities Presented in the Gross Amounts Not Offset in the Statements of Condition Recognized Statements of Statements of Financial Cash (In thousands) Liabilities Condition Condition Instruments Collateral Pledged Net Amount December 31, 2016 Interest Rate Swap Agreements: Institutional counterparties $ (20,077 ) $ 4,689 $ (15,388 ) $ 14,738 $ 650 $ — Commercial counterparties (4,407 ) 23 (4,384 ) — — (4,384 ) Total $ (24,484 ) $ 4,712 $ (19,772 ) $ 14,738 $ 650 $ (4,384 ) Offsetting of Financial Liabilities and Derivative Liabilities Gross Amounts of Gross Amounts Offset in the Net Amounts of Liabilities Presented in the Gross Amounts Not Offset in the Statements of Condition Recognized Statements of Statements of Financial Cash (In thousands) Liabilities Condition Condition Instruments Collateral Pledged Net Amount September 30, 2017 Interest Rate Swap Agreements: Institutional counterparties $ (13,903 ) $ 3,450 $ (10,453 ) $ 9,043 $ 1,410 $ — Commercial counterparties (3,369 ) 32 (3,337 ) — — (3,337 ) Total $ (17,272 ) $ 3,482 $ (13,790 ) $ 9,043 $ 1,410 $ (3,337 )

FAIR VALUE MEASUREMENTS (Tables

FAIR VALUE MEASUREMENTS (Tables)	9 Months Ended
	Sep. 30, 2017
Quantitative information about the significant unobservable inputs within Level 3
Summary of Financial Assets and Financial Liabilities Measured at Fair Value on a Recurring Basis Segregated by the Level of the Valuation Inputs Within the Fair Value Hierarchy Utilized to Measure Fair Value	The following table summarizes financial assets and financial liabilities measured at fair value on a recurring basis as of September 30, 2017 and December 31, 2016 , segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value. September 30, 2017 Level 1 Level 2 Level 3 Total (In thousands) Inputs Inputs Inputs Fair Value Trading security $ — $ — $ 12,603 $ 12,603 Available-for-sale securities: Municipal bonds and obligations — 118,760 — 118,760 Agency collateralized mortgage obligations — 807,436 — 807,436 Agency residential mortgage-backed securities — 217,067 — 217,067 Agency commercial mortgage-backed securities — 63,044 — 63,044 Corporate bonds — 67,234 — 67,234 Trust preferred securities — 11,792 — 11,792 Other bonds and obligations — 10,291 — 10,291 Marketable equity securities 45,055 334 — 45,389 Loans held for sale — 143,745 — 143,745 Derivative assets 518 15,379 6,437 22,334 Capitalized servicing rights — — 2,707 2,707 Derivative liabilities — 17,198 — 17,198 December 31, 2016 Level 1 Level 2 Level 3 Total (In thousands) Inputs Inputs Inputs Fair Value Trading security $ — $ — $ 13,229 $ 13,229 Available-for-sale securities: Municipal bonds and obligations — 119,816 — 119,816 Agency collateralized mortgage obligations — 651,911 — 651,911 Agency residential mortgage-backed securities — 228,684 — 228,684 Agency commercial mortgage-backed securities — 64,534 — 64,534 Corporate bonds — 56,006 — 56,006 Trust preferred securities — 11,887 — 11,887 Other bonds and obligations — 11,158 — 11,158 Marketable equity securities 62,284 3,257 — 65,541 Loans held for sale — 120,673 — 120,673 Derivative assets 622 16,157 4,838 21,617 Capitalized servicing rights — — 798 798 Derivative liabilities — 24,420 — 24,420
Schedule of Loans Held for Sale	Aggregate Fair Value September 30, 2017 Aggregate Aggregate Less Aggregate (In thousands) Fair Value Unpaid Principal Unpaid Principal Loans Held for Sale $ 143,745 $ 139,298 $ 4,447 Aggregate Fair Value December 31, 2016 Aggregate Aggregate Less Aggregate (In thousands) Fair Value Unpaid Principal Unpaid Principal Loans Held for Sale $ 120,673 $ 118,178 $ 2,495
Schedule of Changes in Level 3 Assets and Liabilities That Were Measured at Fair Value on a Recurring Basis	The table below presents the changes in Level 3 assets and liabilities that were measured at fair value on a recurring basis for the three and nine months ended September 30, 2017 and 2016 . Assets (Liabilities) Securities Capitalized Trading Available Commitments Forward Servicing (In thousands) Security for Sale to Lend Commitments Rights Three Months Ended September 30, 2017 June 30, 2017 $ 12,837 $ — $ 7,374 $ 12 $ 1,568 Unrealized (loss) gain, net recognized in other non-interest income (76 ) — 15,146 (30 ) (132 ) Paydown of trading security (158 ) — — — — Transfers to held for sale loans — — (16,065 ) — — Additions to servicing rights — — — — 1,271 September 30, 2017 $ 12,603 $ — $ 6,455 $ (18 ) $ 2,707 Nine Months Ended September 30, 2017 December 31, 2016 $ 13,229 $ — $ 4,738 $ 100 $ 798 Unrealized gain, net recognized in other non-interest income (155 ) — 48,963 (118 ) (202 ) Paydown of trading security (471 ) — — — — Transfers to held for sale loans — — (47,246 ) — — Additions to servicing rights — — — — 2,111 September 30, 2017 $ 12,603 $ — $ 6,455 $ (18 ) $ 2,707 Unrealized gains (losses) relating to instruments still held at September 30, 2017 $ 1,763 $ — $ 6,455 $ (18 ) $ — Assets (Liabilities) Securities Capitalized Trading Available Commitments Forward Servicing (In thousands) Security for Sale to Lend Commitments Rights Three Months Ended September 30, 2016 June 30, 2016 $ 14,479 $ — $ 1,259 $ (189 ) $ — Unrealized (loss) gain, net recognized in other non-interest income (180 ) — 3,563 (62 ) — Paydown of trading security (150 ) — — — — Transfers to held for sale loans — — (3,248 ) — — September 30, 2016 $ 14,149 $ — $ 1,574 $ (251 ) $ — Nine Months Ended September 30, 2016 December 31, 2015 $ 14,189 $ 708 $ 323 $ 9 $ — Unrealized gain, net recognized in other non-interest income 405 — 6,480 (260 ) — Paydown of trading security (445 ) — — — — Transfers to Level 2 — (708 ) — — — Transfers to held for sale loans — — (5,229 ) — — September 30, 2016 $ 14,149 $ — $ 1,574 $ (251 ) $ — Unrealized gains (losses) relating to instruments still held at September 30, 2016 $ 2,610 $ — $ 1,574 $ (251 ) $ —
Summary of Applicable Non-Recurring Fair Value Measurements	Quantitative information about the significant unobservable inputs within Level 3 non-recurring assets is as follows: Fair Value (In thousands) September 30, 2017 Valuation Techniques Unobservable Inputs Range (Weighted Average) (a) Assets Impaired loans $ 28,082 Appraised value of collateral Discounted cash flow - loss severity 39.05% to 0.13% (3.70%) Appraised value $16 to $5,987 ($2,062) Capitalized servicing rights 12,663 Discounted cash flow Constant prepayment rate (CPR) 7.78% to 13.69% (10.57%) Discount rate 10.00% to 12.76% (11.55%) Other real estate owned 288 Appraised value of collateral Appraised value $94 to $215 ($226) Total $ 41,033 (a) Where dollar amounts are disclosed, the amounts represent the lowest and highest fair value of the respective assets in the population except for adjustments for market/property conditions, which represents the range of adjustments to individuals properties. Fair Value (In thousands) December 31, 2016 Valuation Techniques Unobservable Inputs Range (Weighted Average) (a) Assets Impaired loans $ 17,761 Appraised value of collateral Discounted cash flow - loss severity 0.00% to 88.70% (9.73%) Appraised value $0 to $2,192 ($1,026) Capitalized servicing rights 10,726 Discounted cash flow Constant prepayment rate (CPR) 7.35% to 14.28% (10.44%) Discount rate 10.00% to 14.00 (11.77%) Other real estate owned 151 Appraised value of collateral Appraised value $101 to $129 ($122) Total $ 28,638 (a) Where dollar amounts are disclosed, the amounts represent the lowest and highest fair value of the respective assets in the population except for adjustments for market/property conditions, which represents the range of adjustments to individuals properties.
Summary of Estimated Fair Values, and Related Carrying Amounts, of Financial Instruments	The following tables summarize the estimated fair values, and related carrying amounts, of the Company’s financial instruments. Certain financial instruments and all non-financial instruments are excluded. Accordingly, the aggregate fair value amounts presented may not necessarily represent the underlying fair value of the Company. September 30, 2017 Carrying Fair (In thousands) Amount Value Level 1 Level 2 Level 3 Financial Assets Cash and cash equivalents $ 92,046 $ 92,046 $ 92,046 $ — $ — Trading security 12,603 12,603 — — 12,603 Securities available for sale 1,341,013 1,341,013 45,055 1,295,958 — Securities held to maturity 395,065 402,799 — 368,063 34,736 FHLB bank stock and restricted securities 75,117 75,117 — 75,117 — Net loans 6,898,402 6,930,703 — — 6,930,703 Loans held for sale 143,745 143,745 — 143,745 — Accrued interest receivable 29,133 29,133 — 29,133 — Cash surrender value of bank-owned life insurance policies 161,290 161,290 — 161,290 — Derivative assets 22,334 22,334 518 15,379 6,437 Assets held for sale 322 322 — 322 — Financial Liabilities Total deposits $ 6,790,146 $ 6,785,879 $ — $ 6,785,879 $ — Short-term debt 1,061,300 1,061,232 — 1,061,232 — Long-term Federal Home Loan Bank advances 338,054 337,653 — 337,653 — Subordinated borrowings 89,295 98,394 — 98,394 — Derivative liabilities 17,198 17,198 — 17,198 — December 31, 2016 Carrying Fair (In thousands) Amount Value Level 1 Level 2 Level 3 Financial Assets Cash and cash equivalents $ 113,075 $ 113,075 $ 113,075 $ — $ — Trading security 13,229 13,229 — — 13,229 Securities available for sale 1,209,537 1,209,537 62,284 1,147,253 — Securities held to maturity 334,368 337,680 — 300,806 36,874 FHLB bank stock and restricted securities 71,112 71,112 — 71,112 — Net loans 6,505,789 6,532,745 — — 6,532,745 Loans held for sale 120,673 120,673 — 120,673 — Accrued interest receivable 26,113 26,113 — 26,113 — Cash surrender value of bank-owned life insurance policies 139,257 139,257 — 139,257 — Derivative assets 21,617 21,617 622 16,157 4,838 Assets held for sale 322 322 — 322 — Financial Liabilities Total deposits $ 6,622,092 $ 6,624,108 $ — $ 6,624,108 $ — Short-term debt 1,082,044 1,081,996 — 1,081,996 — Long-term Federal Home Loan Bank advances 142,792 143,151 — 143,151 — Subordinated borrowings 89,161 96,973 — 96,973 — Derivative liabilities 24,420 24,420 — 24,420 —
Recurring
Quantitative information about the significant unobservable inputs within Level 3
Schedule of Quantitative Information About the Significant Unobservable Inputs Within Level 3	Quantitative information about the significant unobservable inputs within Level 3 recurring assets and liabilities is as follows: Fair Value Significant Unobservable Input (In thousands) September 30, 2017 Valuation Techniques Unobservable Inputs Value Assets (Liabilities) Trading Security $ 12,603 Discounted Cash Flow Discount Rate 2.59 % Commitments to Lend 6,455 Historical Trend Closing Ratio 80.50 % Pricing Model Origination Costs, per loan $ 3,692 Forward Commitments (18 ) Historical Trend Closing Ratio 80.50 % Pricing Model Origination Costs, per loan $ 3,692 Capitalized Servicing Rights 2,707 Discounted Cash Flow Constant Prepayment rate (CPR) 10.20 % Discount Rate 10.95 % Total $ 21,747 Fair Value Significant Unobservable Input (In thousands) December 31, 2016 Valuation Techniques Unobservable Inputs Value Assets (Liabilities) Trading Security $ 13,229 Discounted Cash Flow Discount Rate 2.62 % Commitments to Lend 4,738 Historical Trend Closing Ratio 80.36 % Pricing Model Origination Costs, per loan $ 3,692 Forward Commitments 100 Historical Trend Closing Ratio 80.36 % Pricing Model Origination Costs, per loan $ 3,692 Capitalized Servicing Rights 798 Discounted Cash Flow Constant Prepayment rate (CPR) 10.40 % Discount Rate 11.00 % Total $ 18,865
Non-recurring
Quantitative information about the significant unobservable inputs within Level 3
Schedule of Quantitative Information About the Significant Unobservable Inputs Within Level 3	The following is a summary of applicable non-recurring fair value measurements. There are no liabilities measured at fair value on a non-recurring basis. September 30, 2017 December 31, 2016 Fair Value Measurement Date as of September 30, 2017 Level 3 Level 3 Level 3 (In thousands) Inputs Inputs Inputs Assets Impaired loans $ 28,082 $ 17,761 September 2017 Capitalized servicing rights 12,663 10,726 August/September 2017 Other real estate owned 288 151 April 2016 - June 2017 Total $ 41,033 $ 28,638

NET INTEREST INCOME AFTER PRO34

NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES (Tables)	9 Months Ended
	Sep. 30, 2017
Banking and Thrift, Interest [Abstract]
Schedule of Net Interest Income After Provision for Loan Losses	Presented below is net interest income after provision for loan losses for the three and nine months ended September 30, 2017 and 2016, respectively. Three Months Ended September 30, Nine Months Ended September 30, (In thousands) 2017 2016 2017 2016 Net interest income $ 71,998 $ 57,971 $ 208,429 $ 173,109 Provision for loan losses 4,900 4,734 14,884 13,262 Net interest income after provision for loan losses $ 67,098 $ 53,237 $ 193,545 $ 159,847

TRADING SECURITY (Details)

TRADING SECURITY (Details) - USD ($)	Sep. 30, 2017	Dec. 31, 2016
Trading Securities [Abstract]
Amortized cost	$ 10,900,000	$ 11,400,000
Fair value	12,603,000	$ 13,229,000
Amount of other securities in the trading portfolio	$ 0

SECURITIES AVAILABLE FOR SALE36

SECURITIES AVAILABLE FOR SALE AND HELD TO MATURITY - Summary of Securities Available for Sale and Held to Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Available-for-sale Debt Securities, Amortized Cost Basis [Abstract]
Available-for-sale debt securities, amortized cost basis	$ 1,291,825	$ 1,145,448
Available-for-sale debt securities, accumulated gross unrealized gain	10,108	7,234
Available-for-sale debt securities, accumulated gross unrealized loss	(6,309)	(8,686)
Available-for-sale securities, debt securities	1,295,624	1,143,996
Available-for-sale Equity Securities, Amortized Cost Basis [Abstract]
Available-for-sale equity securities, amortized cost basis	36,054	47,858
Available-for-sale equity securities, accumulated gross unrealized gain	9,645	19,296
Available-for-sale equity securities, accumulated gross unrealized loss	(310)	(1,613)
Available-for-sale securities, equity securities	45,389	65,541
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Available-for-sale securities, amortized cost basis	1,327,879	1,193,306
Available-for-sale securities, accumulated gross unrealized gain	19,753	26,530
Available-for-sale securities, accumulated gross unrealized loss	(6,619)	(10,299)
Available for sale securities	1,341,013	1,209,537
Securities held to maturity
Held to maturity, amortized cost basis	395,065	334,368
Held to maturity securities accumulated unrecognized holding gains	9,712	6,816
Held to maturity securities, accumulated unrecognized holding loss	(1,978)	(3,504)
Securities held to maturity, fair value	402,799	337,680
Available-for-sale Securities and Held-to-maturity Securities [Abstract]
Held to maturity and available for sale securities, amortized cost basis	1,722,944	1,527,674
Held to maturity and available for sale securities, gross unrealized gain	29,465	33,346
Held to maturity and available for sale securities, gross unrealized loss	(8,597)	(13,803)
Held to maturity and available for sale securities, fair value	1,743,812	1,547,217
Municipal bonds and obligations
Available-for-sale Debt Securities, Amortized Cost Basis [Abstract]
Available-for-sale debt securities, amortized cost basis	114,365	117,910
Available-for-sale debt securities, accumulated gross unrealized gain	4,828	2,955
Available-for-sale debt securities, accumulated gross unrealized loss	(433)	(1,049)
Available-for-sale securities, debt securities	118,760	119,816
Securities held to maturity
Held to maturity, amortized cost basis	268,990	203,463
Held to maturity securities accumulated unrecognized holding gains	6,196	3,939
Held to maturity securities, accumulated unrecognized holding loss	(1,300)	(2,416)
Securities held to maturity, fair value	273,886	204,986
Agency collateralized mortgage obligations
Available-for-sale Debt Securities, Amortized Cost Basis [Abstract]
Available-for-sale debt securities, amortized cost basis	807,772	652,680
Available-for-sale debt securities, accumulated gross unrealized gain	2,538	2,522
Available-for-sale debt securities, accumulated gross unrealized loss	(2,874)	(3,291)
Available-for-sale securities, debt securities	807,436	651,911
Securities held to maturity
Held to maturity, amortized cost basis	74,277	75,655
Held to maturity securities accumulated unrecognized holding gains	1,679	1,281
Held to maturity securities, accumulated unrecognized holding loss	(356)	(411)
Securities held to maturity, fair value	75,600	76,525
Agency mortgage-backed securities
Available-for-sale Debt Securities, Amortized Cost Basis [Abstract]
Available-for-sale debt securities, amortized cost basis	217,626	230,308
Available-for-sale debt securities, accumulated gross unrealized gain	911	557
Available-for-sale debt securities, accumulated gross unrealized loss	(1,470)	(2,181)
Available-for-sale securities, debt securities	217,067	228,684
Securities held to maturity
Held to maturity, amortized cost basis	8,080	9,102
Held to maturity securities accumulated unrecognized holding gains	0	0
Held to maturity securities, accumulated unrecognized holding loss	(142)	(243)
Securities held to maturity, fair value	7,938	8,859
Agency commercial mortgage-backed securities
Available-for-sale Debt Securities, Amortized Cost Basis [Abstract]
Available-for-sale debt securities, amortized cost basis	64,296	65,673
Available-for-sale debt securities, accumulated gross unrealized gain	126	229
Available-for-sale debt securities, accumulated gross unrealized loss	(1,378)	(1,368)
Available-for-sale securities, debt securities	63,044	64,534
Securities held to maturity
Held to maturity, amortized cost basis	10,497	10,545
Held to maturity securities accumulated unrecognized holding gains	0	0
Held to maturity securities, accumulated unrecognized holding loss	(180)	(434)
Securities held to maturity, fair value	10,317	10,111
Tax advantaged economic development bonds
Securities held to maturity
Held to maturity, amortized cost basis	32,899	35,278
Held to maturity securities accumulated unrecognized holding gains	1,837	1,596
Held to maturity securities, accumulated unrecognized holding loss	0	0
Securities held to maturity, fair value	34,736	36,874
Corporate bonds
Available-for-sale Debt Securities, Amortized Cost Basis [Abstract]
Available-for-sale debt securities, amortized cost basis	66,321	56,320
Available-for-sale debt securities, accumulated gross unrealized gain	1,059	408
Available-for-sale debt securities, accumulated gross unrealized loss	(146)	(722)
Available-for-sale securities, debt securities	67,234	56,006
Trust preferred securities
Available-for-sale Debt Securities, Amortized Cost Basis [Abstract]
Available-for-sale debt securities, amortized cost basis	11,350	11,578
Available-for-sale debt securities, accumulated gross unrealized gain	442	368
Available-for-sale debt securities, accumulated gross unrealized loss	0	(59)
Available-for-sale securities, debt securities	11,792	11,887
Other bonds and obligations
Available-for-sale Debt Securities, Amortized Cost Basis [Abstract]
Available-for-sale debt securities, amortized cost basis	10,095	10,979
Available-for-sale debt securities, accumulated gross unrealized gain	204	195
Available-for-sale debt securities, accumulated gross unrealized loss	(8)	(16)
Available-for-sale securities, debt securities	10,291	11,158
Securities held to maturity
Held to maturity, amortized cost basis	322	325
Held to maturity securities accumulated unrecognized holding gains	0	0
Held to maturity securities, accumulated unrecognized holding loss	0	0
Securities held to maturity, fair value	$ 322	$ 325

SECURITIES AVAILABLE FOR SALE37

SECURITIES AVAILABLE FOR SALE AND HELD TO MATURITY - Schedule of Maturity of Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Available for sale, Amortized Cost
Within 1 year	$ 623
Over 1 year to 5 years	31,653
Over 5 years to 10 years	56,336
Over 10 years	113,519
Total bonds and obligations	202,131
Marketable equity securities	36,054	$ 47,858
Mortgage-backed securities	1,089,694
Available-for-sale securities, amortized cost basis	1,327,879	1,193,306
Available for sale, Fair Value
Within 1 year	626
Over 1 year to 5 years	32,254
Over 5 years to 10 years	57,943
Over 10 years	117,254
Total bonds and obligations	208,077
Marketable equity securities	45,389	65,541
Mortgage-backed securities	1,087,547
Available for sale securities	1,341,013	1,209,537
Held to maturity, Amortized Cost
Within 1 year	2,640
Over 1 year to 5 years	26,324
Over 5 years to 10 years	8,467
Over 10 years	264,780
Total bonds and obligations	302,211
Mortgage-backed securities	92,854
Held to maturity, amortized cost basis	395,065	334,368
Held to maturity, Fair Value
Within 1 year	2,642
Over 1 year to 5 years	27,305
Over 5 years to 10 years	8,925
Over 10 years	270,072
Total bonds and obligations	308,944
Total bonds and obligations	93,855
Fair Value	$ 402,799	$ 337,680

SECURITIES AVAILABLE FOR SALE38

SECURITIES AVAILABLE FOR SALE AND HELD TO MATURITY - Summary of Securities with Unrealized Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Available for sale securities, less than twelve months, gross unrealized losses	$ 4,719	$ 8,044
Available for sale securities, over twelve months, gross unrealized losses	1,900	2,255
Available for sale securities, continuous unrealized loss position, accumulated loss	6,619	10,299
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Available for sale securities, continuous unrealized loss position, less than twelve months, fair value	615,089	523,307
Available for sale securities, continuous unrealized loss position, over twelve months, fair value	73,339	28,874
Available for sale securities, continuous unrealized loss position, fair value	688,428	552,181
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Held-to-maturity securities, continuous unrealized loss position, less than twelve months, accumulated loss	1,534	3,504
Held-to-maturity securities, continuous unrealized loss position, over twelve months, gross unrealized losses	444	0
Held to maturity securities, accumulated unrecognized holding loss	1,978	3,504
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Held to maturity securities, accumulated unrecognized holding loss, less than twelve months, fair value	95,999	103,002
Held to maturity securities, accumulated unrecognized holding loss, over twelve months, fair value	12,362	0
Held to maturity securities, accumulated unrecognized holding loss, fair value	108,361	103,002
Securities available for sale and held to maturity
Held to maturity and available for sale securities continuous unrealized loss position, less than twelve months, aggregate losses	6,253	11,548
Held to maturity and available for sale securities continuous unrealized loss position, less than twelve months, fair value	711,088	626,309
Held to maturity and available for sale securities continuous unrealized loss position, over twelve months, aggregate losses	2,344	2,255
Held to maturity and available for sale securities continuous unrealized loss position, over twelve months, fair value	85,701	28,874
Held to maturity and available for sale securities continuous unrealized loss position, aggregate losses	8,597	13,803
Held to maturity and available for sale securities continuous unrealized loss position, fair value	796,789	655,183
Debt securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Available for sale securities, less than twelve months, gross unrealized losses	4,409	7,887
Available for sale securities, over twelve months, gross unrealized losses	1,900	799
Available for sale securities, continuous unrealized loss position, accumulated loss	6,309	8,686
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Available for sale securities, continuous unrealized loss position, less than twelve months, fair value	610,139	516,707
Available for sale securities, continuous unrealized loss position, over twelve months, fair value	73,339	22,947
Available for sale securities, continuous unrealized loss position, fair value	683,478	539,654
Debt securities | Municipal bonds and obligations
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Available for sale securities, less than twelve months, gross unrealized losses	52	1,049
Available for sale securities, over twelve months, gross unrealized losses	381	0
Available for sale securities, continuous unrealized loss position, accumulated loss	433	1,049
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Available for sale securities, continuous unrealized loss position, less than twelve months, fair value	3,046	13,839
Available for sale securities, continuous unrealized loss position, over twelve months, fair value	8,828	0
Available for sale securities, continuous unrealized loss position, fair value	11,874	13,839
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Held-to-maturity securities, continuous unrealized loss position, less than twelve months, accumulated loss	856	2,416
Held-to-maturity securities, continuous unrealized loss position, over twelve months, gross unrealized losses	444	0
Held to maturity securities, accumulated unrecognized holding loss	1,300	2,416
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Held to maturity securities, accumulated unrecognized holding loss, less than twelve months, fair value	64,187	69,308
Held to maturity securities, accumulated unrecognized holding loss, over twelve months, fair value	12,362	0
Held to maturity securities, accumulated unrecognized holding loss, fair value	76,549	69,308
Debt securities | Agency collateralized mortgage obligations
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Available for sale securities, less than twelve months, gross unrealized losses	2,547	3,291
Available for sale securities, over twelve months, gross unrealized losses	327	0
Available for sale securities, continuous unrealized loss position, accumulated loss	2,874	3,291
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Available for sale securities, continuous unrealized loss position, less than twelve months, fair value	466,132	319,448
Available for sale securities, continuous unrealized loss position, over twelve months, fair value	15,320	0
Available for sale securities, continuous unrealized loss position, fair value	481,452	319,448
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Held-to-maturity securities, continuous unrealized loss position, less than twelve months, accumulated loss	356	411
Held-to-maturity securities, continuous unrealized loss position, over twelve months, gross unrealized losses	0	0
Held to maturity securities, accumulated unrecognized holding loss	356	411
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Held to maturity securities, accumulated unrecognized holding loss, less than twelve months, fair value	13,557	14,724
Held to maturity securities, accumulated unrecognized holding loss, over twelve months, fair value	0	0
Held to maturity securities, accumulated unrecognized holding loss, fair value	13,557	14,724
Debt securities | Agency mortgage-backed securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Available for sale securities, less than twelve months, gross unrealized losses	1,121	2,153
Available for sale securities, over twelve months, gross unrealized losses	349	28
Available for sale securities, continuous unrealized loss position, accumulated loss	1,470	2,181
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Available for sale securities, continuous unrealized loss position, less than twelve months, fair value	106,495	130,766
Available for sale securities, continuous unrealized loss position, over twelve months, fair value	12,654	2,061
Available for sale securities, continuous unrealized loss position, fair value	119,149	132,827
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Held-to-maturity securities, continuous unrealized loss position, less than twelve months, accumulated loss	142	243
Held-to-maturity securities, continuous unrealized loss position, over twelve months, gross unrealized losses	0	0
Held to maturity securities, accumulated unrecognized holding loss	142	243
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Held to maturity securities, accumulated unrecognized holding loss, less than twelve months, fair value	7,938	8,859
Held to maturity securities, accumulated unrecognized holding loss, over twelve months, fair value	0	0
Held to maturity securities, accumulated unrecognized holding loss, fair value	7,938	8,859
Debt securities | Agency commercial mortgage-backed securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Available for sale securities, less than twelve months, gross unrealized losses	681	1,368
Available for sale securities, over twelve months, gross unrealized losses	697	0
Available for sale securities, continuous unrealized loss position, accumulated loss	1,378	1,368
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Available for sale securities, continuous unrealized loss position, less than twelve months, fair value	32,357	44,860
Available for sale securities, continuous unrealized loss position, over twelve months, fair value	20,678	0
Available for sale securities, continuous unrealized loss position, fair value	53,035	44,860
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Held-to-maturity securities, continuous unrealized loss position, less than twelve months, accumulated loss	180	434
Held-to-maturity securities, continuous unrealized loss position, over twelve months, gross unrealized losses	0	0
Held to maturity securities, accumulated unrecognized holding loss	180	434
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Held to maturity securities, accumulated unrecognized holding loss, less than twelve months, fair value	10,317	10,111
Held to maturity securities, accumulated unrecognized holding loss, over twelve months, fair value	0	0
Held to maturity securities, accumulated unrecognized holding loss, fair value	10,317	10,111
Debt securities | Corporate bonds
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Available for sale securities, less than twelve months, gross unrealized losses	0	11
Available for sale securities, over twelve months, gross unrealized losses	146	711
Available for sale securities, continuous unrealized loss position, accumulated loss	146	722
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Available for sale securities, continuous unrealized loss position, less than twelve months, fair value	0	4,780
Available for sale securities, continuous unrealized loss position, over twelve months, fair value	15,859	19,655
Available for sale securities, continuous unrealized loss position, fair value	15,859	24,435
Debt securities | Trust preferred securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Available for sale securities, less than twelve months, gross unrealized losses		0
Available for sale securities, over twelve months, gross unrealized losses		59
Available for sale securities, continuous unrealized loss position, accumulated loss		59
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Available for sale securities, continuous unrealized loss position, less than twelve months, fair value		0
Available for sale securities, continuous unrealized loss position, over twelve months, fair value		1,204
Available for sale securities, continuous unrealized loss position, fair value		1,204
Debt securities | Other bonds and obligations
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Available for sale securities, less than twelve months, gross unrealized losses	8	15
Available for sale securities, over twelve months, gross unrealized losses	0	1
Available for sale securities, continuous unrealized loss position, accumulated loss	8	16
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Available for sale securities, continuous unrealized loss position, less than twelve months, fair value	2,109	3,014
Available for sale securities, continuous unrealized loss position, over twelve months, fair value	0	27
Available for sale securities, continuous unrealized loss position, fair value	2,109	3,041
Marketable equity securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Available for sale securities, less than twelve months, gross unrealized losses	310	157
Available for sale securities, over twelve months, gross unrealized losses	0	1,456
Available for sale securities, continuous unrealized loss position, accumulated loss	310	1,613
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Available for sale securities, continuous unrealized loss position, less than twelve months, fair value	4,950	6,600
Available for sale securities, continuous unrealized loss position, over twelve months, fair value	0	5,927
Available for sale securities, continuous unrealized loss position, fair value	$ 4,950	$ 12,527

SECURITIES AVAILABLE FOR SALE39

SECURITIES AVAILABLE FOR SALE AND HELD TO MATURITY - Narrative (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2017USD ($)security	Dec. 31, 2016USD ($)
Investment Holdings [Line Items]
Securities available for sale, at fair value | $	$ 1,341,013	$ 1,209,537
Level 2
Investment Holdings [Line Items]
Securities available for sale, at fair value | $	$ 1,295,958	$ 1,147,253
Marketable equity securities
Investment Holdings [Line Items]
Available-for-sale, securities in unrealized loss positions (security)	3
Available for sale securities portfolio, number of securities (security)	19
Available for sale and held to maturity securities, continuous unrealized loss position, aggregate losses (as percent)	5.60%
Municipal bonds and obligations
Investment Holdings [Line Items]
Available for sale and held to maturity securities, continuous unrealized loss position, aggregate losses (as percent)	1.70%
Held-to-maturity, securities in unrealized loss positions (security)	52
Held-to-maturity securities portfolio, number of securities (security)	232
Municipal bonds and obligations | Debt securities
Investment Holdings [Line Items]
Available-for-sale, securities in unrealized loss positions (security)	7
Available for sale securities portfolio, number of securities (security)	263
Available for sale and held to maturity securities, continuous unrealized loss position, aggregate losses (as percent)	3.50%
Agency collateralized mortgage obligations
Investment Holdings [Line Items]
Available for sale and held to maturity securities, continuous unrealized loss position, aggregate losses (as percent)	1.80%
Held-to-maturity, securities in unrealized loss positions (security)	1
Held-to-maturity securities portfolio, number of securities (security)	9
Agency collateralized mortgage obligations | Debt securities
Investment Holdings [Line Items]
Available-for-sale, securities in unrealized loss positions (security)	99
Available for sale securities portfolio, number of securities (security)	241
Available for sale and held to maturity securities, continuous unrealized loss position, aggregate losses (as percent)	0.60%
Mortgage-backed securities
Investment Holdings [Line Items]
Available for sale and held to maturity securities, continuous unrealized loss position, aggregate losses (as percent)	1.70%
Held-to-maturity, securities in unrealized loss positions (security)	2
Held-to-maturity securities portfolio, number of securities (security)	2
Mortgage-backed securities | Debt securities
Investment Holdings [Line Items]
Available-for-sale, securities in unrealized loss positions (security)	49
Available for sale securities portfolio, number of securities (security)	103
Available for sale and held to maturity securities, continuous unrealized loss position, aggregate losses (as percent)	1.60%
Corporate bonds | One Investment | Level 2
Investment Holdings [Line Items]
Securities available for sale, at fair value | $	$ 15,900
Corporate bonds | Debt securities
Investment Holdings [Line Items]
Available-for-sale, securities in unrealized loss positions (security)	1
Available for sale securities portfolio, number of securities (security)	14
Available for sale and held to maturity securities, continuous unrealized loss position, aggregate losses (as percent)	0.90%
Corporate bonds | Debt securities | One Investment
Investment Holdings [Line Items]
Available for sale securities gross unrealized loss accumulated in investments | $	$ 146
Securities available for sale, at fair value | $	$ 16,000
Other bonds and obligations | Debt securities
Investment Holdings [Line Items]
Available-for-sale, securities in unrealized loss positions (security)	5
Available for sale securities portfolio, number of securities (security)	9
Available for sale and held to maturity securities, continuous unrealized loss position, aggregate losses (as percent)	0.40%

LOANS - Summary of Total Loans

LOANS - Summary of Total Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 6,947,406	$ 6,549,787
Business Activities Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	5,841,115	5,221,307
Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	1,106,291	1,328,480
Total commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	3,926,184	3,678,476
Total commercial loans | Business Activities Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	3,224,973	2,834,446
Total commercial loans | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	701,211	844,030
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	2,671,237	2,616,438
Commercial Real Estate | Business Activities Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	2,069,985	1,926,344
Commercial Real Estate | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	601,252	690,094
Commercial Real Estate | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	283,549	287,509
Commercial Real Estate | Construction | Business Activities Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	265,059	253,302
Commercial Real Estate | Construction | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	18,490	34,207
Commercial Real Estate | Single and multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	427,094	317,491
Commercial Real Estate | Single and multi-family | Business Activities Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	342,426	191,819
Commercial Real Estate | Single and multi-family | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	84,668	125,672
Commercial Real Estate | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	1,960,594	2,011,438
Commercial Real Estate | Other | Business Activities Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	1,462,500	1,481,223
Commercial Real Estate | Other | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	498,094	530,215
Commercial and industrial loans | Business Activities Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	1,154,988	908,102
Commercial and industrial loans | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	99,959	153,936
Commercial and industrial loans | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	1,254,947	1,062,038
Commercial and industrial loans | Other | Business Activities Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	1,154,988	908,102
Commercial and industrial loans | Other | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	99,959	153,936
Residential Mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	1,983,126	1,893,131
Residential Mortgages | Business Activities Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	1,724,093	1,594,972
Residential Mortgages | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	259,033	298,159
Residential Mortgages | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	7,177	11,982
Residential Mortgages | Construction | Business Activities Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	6,933	11,178
Residential Mortgages | Construction | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	244	804
Residential Mortgages | 1-4 family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	1,975,949	1,881,149
Residential Mortgages | 1-4 family | Business Activities Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	1,717,160	1,583,794
Residential Mortgages | 1-4 family | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	258,789	297,355
Consumer Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	1,038,096	978,180
Consumer Loans | Business Activities Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	892,049	791,889
Consumer Loans | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	146,047	186,291
Consumer Loans | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	385,890	393,800
Consumer Loans | Home equity | Business Activities Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	290,144	313,521
Consumer Loans | Home equity | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	95,746	80,279
Consumer Loans | Auto and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	652,206	584,380
Consumer Loans | Auto and other | Business Activities Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	601,905	478,368
Consumer Loans | Auto and other | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 50,301	$ 106,012

LOANS - Narrative (Details)

LOANS - Narrative (Details) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2017USD ($)contract	Sep. 30, 2017USD ($)contract	Dec. 31, 2016USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 6,947,406	$ 6,947,406	$ 6,549,787
Borrower's sustained repayment performance period		6 months
Modifications that subsequently defaulted, number of contracts | contract	0	2
Residential Mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 1,983,126	$ 1,983,126	1,893,131
Foreclosed property	288	288	151
Residential Mortgages | Mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Process of foreclosure		4,700	4,800
Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,106,291	1,106,291	1,328,480
Acquired Credit Impaired	32,199	32,199	46,816
Certain loans acquired in transfer not accounted for as debt securities, note balance, net	56,800	56,800	86,600
Financing receivable not considered impaired at time of acquisition	1,100,000	1,100,000	1,300,000
Acquired Loans | Residential Mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	259,033	259,033	298,159
Acquired Credit Impaired	7,167	7,167	7,283
Acquired Loans | Residential Mortgages | Mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 259,033	$ 259,033	$ 298,159

LOANS - Accretable Yield Activi

LOANS - Accretable Yield Activity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance at beginning of period	$ 5,767	$ 6,213	$ 8,738	$ 6,925
Acquisitions	0	0	0	708
Reclassification from nonaccretable difference for loans with improved cash flows	10	688	343	2,106
Change in cash flows that do not affect nonaccretable difference	0	0	0	0
Reclassification to TDR	0	0	0	(185)
Accretion	(1,712)	(2,298)	(5,016)	(4,951)
Balance at end of period	$ 4,065	$ 4,603	$ 4,065	$ 4,603

LOANS - Summary of Past Due Loa

LOANS - Summary of Past Due Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	$ 6,947,406	$ 6,549,787
Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	2,671,237	2,616,438
Commercial Real Estate | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	283,549	287,509
Commercial Real Estate | Single and multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	427,094	317,491
Commercial Real Estate | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	1,960,594	2,011,438
Commercial and industrial loans | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	1,254,947	1,062,038
Residential Mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	1,983,126	1,893,131
Residential Mortgages | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	7,177	11,982
Residential Mortgages | 1-4 family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	1,975,949	1,881,149
Consumer Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	1,038,096	978,180
Consumer Loans | Home equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	385,890	393,800
Consumer Loans | Auto and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	652,206	584,380
Business Activities Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	26,774	32,277
Current	5,814,341	5,189,030
Total loans	5,841,115	5,221,307
Past Due 90 days and Accruing	579	2,438
Business Activities Loans | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	5,569	8,174
Business Activities Loans | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,947	4,849
Business Activities Loans | 90 Days or Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	18,258	19,254
Business Activities Loans | Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	5,405	8,288
Current	2,064,580	1,918,056
Total loans	2,069,985	1,926,344
Past Due 90 days and Accruing	163	155
Business Activities Loans | Commercial Real Estate | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Current	265,059	253,302
Total loans	265,059	253,302
Past Due 90 days and Accruing	0	0
Business Activities Loans | Commercial Real Estate | Single and multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	729	1,352
Current	341,697	190,467
Total loans	342,426	191,819
Past Due 90 days and Accruing	163	155
Business Activities Loans | Commercial Real Estate | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,676	6,936
Current	1,457,824	1,474,287
Total loans	1,462,500	1,481,223
Past Due 90 days and Accruing	0	0
Business Activities Loans | Commercial Real Estate | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	450	1,099
Business Activities Loans | Commercial Real Estate | 30-59 Days Past Due | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Business Activities Loans | Commercial Real Estate | 30-59 Days Past Due | Single and multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	143	618
Business Activities Loans | Commercial Real Estate | 30-59 Days Past Due | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	307	481
Business Activities Loans | Commercial Real Estate | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	260	2,353
Business Activities Loans | Commercial Real Estate | 60-89 Days Past Due | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Business Activities Loans | Commercial Real Estate | 60-89 Days Past Due | Single and multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	260	110
Business Activities Loans | Commercial Real Estate | 60-89 Days Past Due | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	2,243
Business Activities Loans | Commercial Real Estate | 90 Days or Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,695	4,836
Business Activities Loans | Commercial Real Estate | 90 Days or Greater Past Due | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Business Activities Loans | Commercial Real Estate | 90 Days or Greater Past Due | Single and multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	326	624
Business Activities Loans | Commercial Real Estate | 90 Days or Greater Past Due | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,369	4,212
Business Activities Loans | Commercial and industrial loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	10,493	10,681
Current	1,144,495	897,421
Total loans	1,154,988	908,102
Past Due 90 days and Accruing	32	5
Business Activities Loans | Commercial and industrial loans | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	1,154,988	908,102
Business Activities Loans | Commercial and industrial loans | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,370	3,090
Business Activities Loans | Commercial and industrial loans | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	640	1,301
Business Activities Loans | Commercial and industrial loans | 90 Days or Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	8,483	6,290
Business Activities Loans | Residential Mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,544	6,283
Current	1,719,549	1,588,689
Total loans	1,724,093	1,594,972
Past Due 90 days and Accruing	125	1,956
Business Activities Loans | Residential Mortgages | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	10
Current	6,933	11,168
Total loans	6,933	11,178
Past Due 90 days and Accruing	0	0
Business Activities Loans | Residential Mortgages | 1-4 family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,544	6,273
Current	1,712,616	1,577,521
Total loans	1,717,160	1,583,794
Past Due 90 days and Accruing	125	1,956
Business Activities Loans | Residential Mortgages | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,055	1,403
Business Activities Loans | Residential Mortgages | 30-59 Days Past Due | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	10
Business Activities Loans | Residential Mortgages | 30-59 Days Past Due | 1-4 family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,055	1,393
Business Activities Loans | Residential Mortgages | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,396	701
Business Activities Loans | Residential Mortgages | 60-89 Days Past Due | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Business Activities Loans | Residential Mortgages | 60-89 Days Past Due | 1-4 family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,396	701
Business Activities Loans | Residential Mortgages | 90 Days or Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,093	4,179
Business Activities Loans | Residential Mortgages | 90 Days or Greater Past Due | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Business Activities Loans | Residential Mortgages | 90 Days or Greater Past Due | 1-4 family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,093	4,179
Business Activities Loans | Consumer Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	6,332	7,025
Current	885,717	784,864
Total loans	892,049	791,889
Past Due 90 days and Accruing	259	322
Business Activities Loans | Consumer Loans | Home equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,213	3,080
Current	287,931	310,441
Total loans	290,144	313,521
Past Due 90 days and Accruing	228	306
Business Activities Loans | Consumer Loans | Auto and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,119	3,945
Current	597,786	474,423
Total loans	601,905	478,368
Past Due 90 days and Accruing	31	16
Business Activities Loans | Consumer Loans | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,694	2,582
Business Activities Loans | Consumer Loans | 30-59 Days Past Due | Home equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	74	99
Business Activities Loans | Consumer Loans | 30-59 Days Past Due | Auto and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,620	2,483
Business Activities Loans | Consumer Loans | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	651	494
Business Activities Loans | Consumer Loans | 60-89 Days Past Due | Home equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	267	0
Business Activities Loans | Consumer Loans | 60-89 Days Past Due | Auto and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	384	494
Business Activities Loans | Consumer Loans | 90 Days or Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,987	3,949
Business Activities Loans | Consumer Loans | 90 Days or Greater Past Due | Home equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,872	2,981
Business Activities Loans | Consumer Loans | 90 Days or Greater Past Due | Auto and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,115	968
Acquired Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	12,007	12,730
Acquired Credit Impaired	32,199	46,816
Total loans	1,106,291	1,328,480
Past Due 90 days and Accruing	2,483	1,611
Acquired Loans | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,163	5,023
Acquired Loans | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	689	672
Acquired Loans | 90 Days or Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	7,155	7,035
Acquired Loans | Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	5,928	2,759
Acquired Credit Impaired	22,247	34,820
Total loans	601,252	690,094
Past Due 90 days and Accruing	2,385	0
Acquired Loans | Commercial Real Estate | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	570	0
Acquired Credit Impaired	0	47
Total loans	18,490	34,207
Past Due 90 days and Accruing	0	0
Acquired Loans | Commercial Real Estate | Single and multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,099	439
Acquired Credit Impaired	3,285	4,726
Total loans	84,668	125,672
Past Due 90 days and Accruing	2,385	0
Acquired Loans | Commercial Real Estate | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,259	2,320
Acquired Credit Impaired	18,962	30,047
Total loans	498,094	530,215
Past Due 90 days and Accruing	0	0
Acquired Loans | Commercial Real Estate | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,624	1,557
Acquired Loans | Commercial Real Estate | 30-59 Days Past Due | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	570	0
Acquired Loans | Commercial Real Estate | 30-59 Days Past Due | Single and multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	421	2
Acquired Loans | Commercial Real Estate | 30-59 Days Past Due | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,633	1,555
Acquired Loans | Commercial Real Estate | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	223	0
Acquired Loans | Commercial Real Estate | 60-89 Days Past Due | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Acquired Loans | Commercial Real Estate | 60-89 Days Past Due | Single and multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	78	0
Acquired Loans | Commercial Real Estate | 60-89 Days Past Due | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	145	0
Acquired Loans | Commercial Real Estate | 90 Days or Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,081	1,202
Acquired Loans | Commercial Real Estate | 90 Days or Greater Past Due | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Acquired Loans | Commercial Real Estate | 90 Days or Greater Past Due | Single and multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,600	437
Acquired Loans | Commercial Real Estate | 90 Days or Greater Past Due | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	481	765
Acquired Loans | Commercial and industrial loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,970	3,127
Acquired Credit Impaired	1,497	3,369
Total loans	99,959	153,936
Past Due 90 days and Accruing	54	24
Acquired Loans | Commercial and industrial loans | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	99,959	153,936
Acquired Loans | Commercial and industrial loans | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	634	1,850
Acquired Loans | Commercial and industrial loans | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	52	15
Acquired Loans | Commercial and industrial loans | 90 Days or Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,284	1,262
Acquired Loans | Residential Mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,161	2,679
Acquired Credit Impaired	7,167	7,283
Total loans	259,033	298,159
Past Due 90 days and Accruing	30	443
Acquired Loans | Residential Mortgages | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Acquired Credit Impaired	0	0
Total loans	244	804
Past Due 90 days and Accruing	0	0
Acquired Loans | Residential Mortgages | 1-4 family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,161	2,679
Acquired Credit Impaired	7,167	7,283
Total loans	258,789	297,355
Past Due 90 days and Accruing	30	443
Acquired Loans | Residential Mortgages | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	624	321
Acquired Loans | Residential Mortgages | 30-59 Days Past Due | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Acquired Loans | Residential Mortgages | 30-59 Days Past Due | 1-4 family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	624	321
Acquired Loans | Residential Mortgages | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	383	343
Acquired Loans | Residential Mortgages | 60-89 Days Past Due | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Acquired Loans | Residential Mortgages | 60-89 Days Past Due | 1-4 family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	383	343
Acquired Loans | Residential Mortgages | 90 Days or Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,154	2,015
Acquired Loans | Residential Mortgages | 90 Days or Greater Past Due | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Acquired Loans | Residential Mortgages | 90 Days or Greater Past Due | 1-4 family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,154	2,015
Acquired Loans | Consumer Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,948	4,165
Acquired Credit Impaired	1,288	1,344
Total loans	146,047	186,291
Past Due 90 days and Accruing	14	1,144
Acquired Loans | Consumer Loans | Home equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,245	1,623
Acquired Credit Impaired	930	957
Total loans	95,746	80,279
Past Due 90 days and Accruing	0	353
Acquired Loans | Consumer Loans | Auto and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	703	2,542
Acquired Credit Impaired	358	387
Total loans	50,301	106,012
Past Due 90 days and Accruing	14	791
Acquired Loans | Consumer Loans | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	281	1,295
Acquired Loans | Consumer Loans | 30-59 Days Past Due | Home equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	23	753
Acquired Loans | Consumer Loans | 30-59 Days Past Due | Auto and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	258	542
Acquired Loans | Consumer Loans | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	31	314
Acquired Loans | Consumer Loans | 60-89 Days Past Due | Home equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2	0
Acquired Loans | Consumer Loans | 60-89 Days Past Due | Auto and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	29	314
Acquired Loans | Consumer Loans | 90 Days or Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,636	2,556
Acquired Loans | Consumer Loans | 90 Days or Greater Past Due | Home equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,220	870
Acquired Loans | Consumer Loans | 90 Days or Greater Past Due | Auto and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 416	$ 1,686

LOANS - Summary Information Per

LOANS - Summary Information Pertaining to Non-accrual Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Non-accrual loans
Non-accrual loans	$ 22,268	$ 22,157
Business Activities Loans
Non-accrual loans
Non-accrual loans	17,679	16,816
Acquired Loans
Non-accrual loans
Non-accrual loans	4,589	5,341
Acquired Credit Impaired Loans
Non-accrual loans
Non-accrual loans	83	83
Commercial Real Estate
Non-accrual loans
Non-accrual loans	5,228	5,883
Commercial Real Estate | Business Activities Loans
Non-accrual loans
Non-accrual loans	4,532	4,681
Commercial Real Estate | Acquired Loans
Non-accrual loans
Non-accrual loans	696	1,202
Commercial Real Estate | Construction
Non-accrual loans
Non-accrual loans	0	0
Commercial Real Estate | Construction | Business Activities Loans
Non-accrual loans
Non-accrual loans	0	0
Commercial Real Estate | Construction | Acquired Loans
Non-accrual loans
Non-accrual loans	0	0
Commercial Real Estate | Single and multi-family
Non-accrual loans
Non-accrual loans	378	906
Commercial Real Estate | Single and multi-family | Business Activities Loans
Non-accrual loans
Non-accrual loans	163	469
Commercial Real Estate | Single and multi-family | Acquired Loans
Non-accrual loans
Non-accrual loans	215	437
Commercial Real Estate | Other
Non-accrual loans
Non-accrual loans	4,850	4,977
Commercial Real Estate | Other | Business Activities Loans
Non-accrual loans
Non-accrual loans	4,369	4,212
Commercial Real Estate | Other | Acquired Loans
Non-accrual loans
Non-accrual loans	481	765
Commercial and industrial loans
Non-accrual loans
Non-accrual loans	9,598	7,440
Commercial and industrial loans | Business Activities Loans
Non-accrual loans
Non-accrual loans	8,451	6,285
Commercial and industrial loans | Acquired Loans
Non-accrual loans
Non-accrual loans	1,147	1,155
Residential Mortgages
Non-accrual loans
Non-accrual loans	3,092	3,795
Residential Mortgages | Business Activities Loans
Non-accrual loans
Non-accrual loans	1,968	2,223
Residential Mortgages | Acquired Loans
Non-accrual loans
Non-accrual loans	1,124	1,572
Residential Mortgages | Construction
Non-accrual loans
Non-accrual loans	0	0
Residential Mortgages | Construction | Business Activities Loans
Non-accrual loans
Non-accrual loans	0	0
Residential Mortgages | Construction | Acquired Loans
Non-accrual loans
Non-accrual loans	0	0
Residential Mortgages | 1-4 family
Non-accrual loans
Non-accrual loans	3,092	3,795
Residential Mortgages | 1-4 family | Business Activities Loans
Non-accrual loans
Non-accrual loans	1,968	2,223
Residential Mortgages | 1-4 family | Acquired Loans
Non-accrual loans
Non-accrual loans	1,124	1,572
Consumer Loans
Non-accrual loans
Non-accrual loans	4,350	5,039
Consumer Loans | Business Activities Loans
Non-accrual loans
Non-accrual loans	2,728	3,627
Consumer Loans | Acquired Loans
Non-accrual loans
Non-accrual loans	1,622	1,412
Consumer Loans | Home equity
Non-accrual loans
Non-accrual loans	2,864	3,192
Consumer Loans | Home equity | Business Activities Loans
Non-accrual loans
Non-accrual loans	1,644	2,675
Consumer Loans | Home equity | Acquired Loans
Non-accrual loans
Non-accrual loans	1,220	517
Consumer Loans | Auto and other
Non-accrual loans
Non-accrual loans	1,486	1,847
Consumer Loans | Auto and other | Business Activities Loans
Non-accrual loans
Non-accrual loans	1,084	952
Consumer Loans | Auto and other | Acquired Loans
Non-accrual loans
Non-accrual loans	$ 402	$ 895

LOANS - Loans Evaluated for Imp

LOANS - Loans Evaluated for Impairment (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Loans receivable: balance at end of period
Total loans	$ 6,947,406	$ 6,549,787
Commercial Real Estate
Loans receivable: balance at end of period
Total loans	2,671,237	2,616,438
Residential Mortgages
Loans receivable: balance at end of period
Total loans	1,983,126	1,893,131
Consumer Loans
Loans receivable: balance at end of period
Total loans	1,038,096	978,180
Business Activities Loans
Loans receivable: balance at end of period
Individually evaluated for impairment	48,293	36,732
Collectively evaluated for impairment	5,792,822	5,184,575
Total loans	5,841,115	5,221,307
Business Activities Loans | Commercial Real Estate
Loans receivable: balance at end of period
Individually evaluated for impairment	34,064	25,549
Collectively evaluated for impairment	2,035,921	1,900,795
Total loans	2,069,985	1,926,344
Business Activities Loans | Commercial and industrial loans
Loans receivable: balance at end of period
Individually evaluated for impairment	10,164	5,705
Collectively evaluated for impairment	1,144,824	902,397
Total loans	1,154,988	908,102
Business Activities Loans | Residential Mortgages
Loans receivable: balance at end of period
Individually evaluated for impairment	2,205	2,775
Collectively evaluated for impairment	1,721,888	1,592,197
Total loans	1,724,093	1,594,972
Business Activities Loans | Consumer Loans
Loans receivable: balance at end of period
Individually evaluated for impairment	1,860	2,703
Collectively evaluated for impairment	890,189	789,186
Total loans	892,049	791,889
Acquired Loans
Loans receivable: balance at end of period
Individually evaluated for impairment	4,787	5,605
Purchased credit-impaired loans	32,199	46,816
Collectively evaluated for impairment	1,069,305	1,276,059
Total loans	1,106,291	1,328,480
Acquired Loans | Commercial Real Estate
Loans receivable: balance at end of period
Individually evaluated for impairment	2,770	4,256
Purchased credit-impaired loans	22,247	34,820
Collectively evaluated for impairment	576,235	651,018
Total loans	601,252	690,094
Acquired Loans | Commercial and industrial loans
Loans receivable: balance at end of period
Individually evaluated for impairment	592	635
Purchased credit-impaired loans	1,497	3,369
Collectively evaluated for impairment	97,870	149,932
Total loans	99,959	153,936
Acquired Loans | Residential Mortgages
Loans receivable: balance at end of period
Individually evaluated for impairment	475	308
Purchased credit-impaired loans	7,167	7,283
Collectively evaluated for impairment	251,391	290,568
Total loans	259,033	298,159
Acquired Loans | Consumer Loans
Loans receivable: balance at end of period
Individually evaluated for impairment	950	406
Purchased credit-impaired loans	1,288	1,344
Collectively evaluated for impairment	143,809	184,541
Total loans	$ 146,047	$ 186,291

LOANS - Summary of Impaired Loa

LOANS - Summary of Impaired Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Business Activities Loans
Recorded Investment
Total	$ 47,700	$ 36,018
Unpaid Principal Balance
Total	48,293	36,732
Related Allowance
With an allowance recorded	593	714
Business Activities Loans | Commercial Real Estate
Recorded Investment
Total	33,925	25,390
Unpaid Principal Balance
Total	34,064	25,548
Related Allowance
With an allowance recorded	139	158
Business Activities Loans | Commercial Real Estate | Single and multi-family
Recorded Investment
With no related allowance	0	0
With an allowance recorded	162	179
Unpaid Principal Balance
With no related allowance	0	0
With an allowance recorded	163	181
Related Allowance
With an allowance recorded	1	2
Business Activities Loans | Commercial Real Estate | Other
Recorded Investment
With no related allowance	19,005	18,905
With an allowance recorded	14,758	6,306
Unpaid Principal Balance
With no related allowance	19,005	18,905
With an allowance recorded	14,896	6,462
Related Allowance
With an allowance recorded	138	156
Business Activities Loans | Commercial and industrial loans
Recorded Investment
Total	9,885	5,442
Unpaid Principal Balance
Total	10,164	5,706
Related Allowance
With an allowance recorded	279	264
Business Activities Loans | Commercial and industrial loans | Other
Recorded Investment
With no related allowance	2,043	382
With an allowance recorded	7,842	5,060
Unpaid Principal Balance
With no related allowance	2,043	382
With an allowance recorded	8,121	5,324
Related Allowance
With an allowance recorded	279	264
Business Activities Loans | Residential Mortgages
Recorded Investment
Total	2,069	2,639
Unpaid Principal Balance
Total	2,205	2,775
Related Allowance
With an allowance recorded	136	136
Business Activities Loans | Residential Mortgages | 1-4 Family
Recorded Investment
With no related allowance	1,033	2,101
With an allowance recorded	1,036	538
Unpaid Principal Balance
With no related allowance	1,033	2,101
With an allowance recorded	1,172	674
Related Allowance
With an allowance recorded	136	136
Business Activities Loans | Consumer Loans
Recorded Investment
Total	1,821	2,547
Unpaid Principal Balance
Total	1,860	2,703
Related Allowance
With an allowance recorded	39	156
Business Activities Loans | Consumer Loans | Other
Recorded Investment
With no related allowance	0	0
With an allowance recorded	0	0
Unpaid Principal Balance
With no related allowance	0	0
With an allowance recorded	0	0
Related Allowance
With an allowance recorded	0	0
Business Activities Loans | Consumer Loans | Home equity
Recorded Investment
With no related allowance	769	1,605
With an allowance recorded	1,052	942
Unpaid Principal Balance
With no related allowance	769	1,605
With an allowance recorded	1,091	1,098
Related Allowance
With an allowance recorded	39	156
Acquired Loans
Recorded Investment
Total	4,676	5,171
Unpaid Principal Balance
Total	4,787	5,605
Related Allowance
With an allowance recorded	111	434
Acquired Loans | Commercial Real Estate
Recorded Investment
Total	2,724	4,006
Unpaid Principal Balance
Total	2,770	4,256
Related Allowance
With an allowance recorded	46	250
Acquired Loans | Commercial Real Estate | Single and multi-family
Recorded Investment
With no related allowance	216	0
With an allowance recorded	871	1,250
Unpaid Principal Balance
With no related allowance	216	0
With an allowance recorded	892	1,358
Related Allowance
With an allowance recorded	21	108
Acquired Loans | Commercial Real Estate | Other
Recorded Investment
With no related allowance	195	547
With an allowance recorded	1,442	2,209
Unpaid Principal Balance
With no related allowance	195	547
With an allowance recorded	1,467	2,351
Related Allowance
With an allowance recorded	25	142
Acquired Loans | Commercial and industrial loans
Recorded Investment
With no related allowance	287	0
With an allowance recorded	303	576
Total	590	576
Unpaid Principal Balance
With no related allowance	287	0
With an allowance recorded	305	635
Total	592	635
Related Allowance
With an allowance recorded	2	59
Acquired Loans | Residential Mortgages
Recorded Investment
Total	456	297
Unpaid Principal Balance
Total	475	308
Related Allowance
With an allowance recorded	19	11
Acquired Loans | Residential Mortgages | 1-4 Family
Recorded Investment
With no related allowance	165	208
With an allowance recorded	291	89
Unpaid Principal Balance
With no related allowance	165	208
With an allowance recorded	310	100
Related Allowance
With an allowance recorded	19	11
Acquired Loans | Consumer Loans
Recorded Investment
Total	906	292
Unpaid Principal Balance
Total	950	406
Related Allowance
With an allowance recorded	44	114
Acquired Loans | Consumer Loans | Other
Recorded Investment
With no related allowance	0
Unpaid Principal Balance
With no related allowance	0
Acquired Loans | Consumer Loans | Home equity
Recorded Investment
With no related allowance	581
With an allowance recorded	325	292
Unpaid Principal Balance
With no related allowance	581
With an allowance recorded	369	406
Related Allowance
With an allowance recorded	$ 44	$ 114

LOANS - Average Recorded Invest

LOANS - Average Recorded Investment and Interest Income Recognized on Impaired Loans (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Business Activities Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment	$ 45,232	$ 23,142
Interest income, cash basis method	1,855	749
Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment	5,386	5,623
Interest income, cash basis method	309	222
Commercial Real Estate | Business Activities Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment	31,941	12,938
Interest income, cash basis method	1,307	463
Commercial Real Estate | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment	3,292	4,094
Interest income, cash basis method	244	184
Commercial Real Estate | Single and multi-family | Business Activities Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment, with no related allowance	84	48
Cash basis interest income recognized, with no related allowance	0	1
Average recorded investment with related allowance	172	0
Cash basis interest income recognized, with related allowance	10	0
Commercial Real Estate | Single and multi-family | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment, with no related allowance	424	0
Cash basis interest income recognized, with no related allowance	79	0
Average recorded investment with related allowance	904	942
Cash basis interest income recognized, with related allowance	36	37
Commercial Real Estate | Other | Business Activities Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment, with no related allowance	21,132	2,624
Cash basis interest income recognized, with no related allowance	934	111
Average recorded investment with related allowance	10,553	10,266
Cash basis interest income recognized, with related allowance	363	351
Commercial Real Estate | Other | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment, with no related allowance	483	546
Cash basis interest income recognized, with no related allowance	73	20
Average recorded investment with related allowance	1,481	2,606
Cash basis interest income recognized, with related allowance	56	127
Commercial and industrial loans | Business Activities Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment, with no related allowance	1,825	805
Cash basis interest income recognized, with no related allowance	69	26
Average recorded investment with related allowance	6,493	4,609
Cash basis interest income recognized, with related allowance	354	154
Average recorded investment	8,318	5,414
Interest income, cash basis method	423	180
Commercial and industrial loans | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment, with no related allowance	319	191
Cash basis interest income recognized, with no related allowance	4	1
Average recorded investment with related allowance	332	404
Cash basis interest income recognized, with related allowance	29	10
Average recorded investment	651	595
Interest income, cash basis method	33	11
Residential Mortgages | Business Activities Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment	2,578	2,993
Interest income, cash basis method	67	72
Residential Mortgages | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment	489	438
Interest income, cash basis method	19	13
Residential Mortgages | 1-4 Family | Business Activities Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment, with no related allowance	1,391	2,309
Cash basis interest income recognized, with no related allowance	29	51
Average recorded investment with related allowance	1,187	684
Cash basis interest income recognized, with related allowance	38	21
Residential Mortgages | 1-4 Family | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment, with no related allowance	170	321
Cash basis interest income recognized, with no related allowance	7	9
Average recorded investment with related allowance	319	117
Cash basis interest income recognized, with related allowance	12	4
Consumer Loans | Business Activities Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment	2,395	1,797
Interest income, cash basis method	58	34
Consumer Loans | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment	954	496
Interest income, cash basis method	13	14
Consumer Loans | Other | Business Activities Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment, with no related allowance	0	1
Cash basis interest income recognized, with no related allowance	0	0
Average recorded investment with related allowance	0	104
Cash basis interest income recognized, with related allowance	0	3
Consumer Loans | Other | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment, with no related allowance	0	140
Cash basis interest income recognized, with no related allowance	0	1
Average recorded investment with related allowance	0	0
Cash basis interest income recognized, with related allowance	0	0
Consumer Loans | Home equity | Business Activities Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment, with no related allowance	1,301	693
Cash basis interest income recognized, with no related allowance	26	5
Average recorded investment with related allowance	1,094	999
Cash basis interest income recognized, with related allowance	32	26
Consumer Loans | Home equity | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment, with no related allowance	567	0
Cash basis interest income recognized, with no related allowance	0	0
Average recorded investment with related allowance	387	356
Cash basis interest income recognized, with related allowance	$ 13	$ 13

LOANS - Recorded Investment and

LOANS - Recorded Investment and Number of Modifications (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017USD ($)modification	Sep. 30, 2016USD ($)modification	Sep. 30, 2017USD ($)modification	Sep. 30, 2016USD ($)modification
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications | modification	3	4	26	9
Pre-Modification Outstanding Recorded Investment	$ 1,654	$ 409	$ 17,174	$ 1,726
Post-Modification Outstanding Recorded Investment	$ 1,654	$ 409	$ 15,430	$ 1,726
Total commercial loans | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications | modification	0		15	2
Pre-Modification Outstanding Recorded Investment	$ 0		$ 13,445	$ 1,049
Post-Modification Outstanding Recorded Investment	$ 0		$ 11,718	$ 1,049
Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications | modification	3	2	8	4
Pre-Modification Outstanding Recorded Investment	$ 1,654	$ 404	$ 3,471	$ 555
Post-Modification Outstanding Recorded Investment	$ 1,654	$ 404	$ 3,471	$ 555
Residential Mortgages | 1-4 Family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications | modification	0	2	2	2
Pre-Modification Outstanding Recorded Investment	$ 0	$ 5	$ 205	$ 5
Post-Modification Outstanding Recorded Investment	$ 0	$ 5	$ 188	$ 5
Consumer Loans | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications | modification	0		1	1
Pre-Modification Outstanding Recorded Investment	$ 0		$ 53	$ 117
Post-Modification Outstanding Recorded Investment	$ 0		$ 53	$ 117

LOANS - Troubled Debt Restructu

LOANS - Troubled Debt Restructurings (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017USD ($)contract	Sep. 30, 2017USD ($)contract
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modifications that subsequently defaulted, number of contracts	0	2
Total commercial loans | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modifications that subsequently defaulted, number of contracts	0	1
Modifications that subsequently defaulted, recorded investment | $	$ 0	$ 113
Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modifications that subsequently defaulted, number of contracts	0	1
Modifications that subsequently defaulted, recorded investment | $	$ 0	$ 101

LOANS - Troubled Debt Restruc50

LOANS - Troubled Debt Restructuring Activity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Trouble Debt Restructuring on Financing Receivables [Roll Forward]
Balance at beginning of the period	$ 44,556	$ 22,122	$ 33,829	$ 22,048
Principal payments	(373)	(932)	(1,527)	(2,041)
TDR status change	0	0	0	2,236
Other reductions/increases	(1,939)	0	(3,834)	(2,370)
Newly identified TDRs	1,654	409	15,430	1,726
Balance at end of the period	$ 43,898	$ 21,599	$ 43,898	$ 21,599

LOAN LOSS ALLOWANCE - Allowance

LOAN LOSS ALLOWANCE - Allowance Activity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Activity in the allowance for loan losses
Balance at beginning of period			$ 43,998
Provision/(releases) for loan losses	$ 4,900	$ 4,734	14,884	$ 13,262
Balance at end of period	49,004		49,004
Allowance For Loan Losses
Total	49,004		43,998		$ 49,004
Business Activities Loans
Activity in the allowance for loan losses
Balance at beginning of period	42,895	37,124	39,229	34,574
Charged-off loans	3,367	2,286	8,565	8,238
Recoveries on charged-off loans	331	308	660	640
Provision/(releases) for loan losses	4,876	3,475	13,411	11,645
Balance at end of period	44,735	38,621	44,735	38,621
Allowance For Loan Losses
Individually evaluated for impairment					593	$ 638
Collectively evaluated for impairment					44,142	37,983
Total	42,895	37,124	39,229	34,574	44,735	38,621
Business Activities Loans | Commercial real estate
Activity in the allowance for loan losses
Balance at beginning of period	15,972	16,732	16,499	14,610
Charged-off loans	1,367	0	2,883	1,578
Recoveries on charged-off loans	14	114	71	242
Provision/(releases) for loan losses	1,210	620	2,142	4,192
Balance at end of period	15,829	17,466	15,829	17,466
Allowance For Loan Losses
Individually evaluated for impairment					139	190
Collectively evaluated for impairment					15,690	17,276
Total	15,972	16,732	16,499	14,610	15,829	17,466
Business Activities Loans | Commercial and industrial loans
Activity in the allowance for loan losses
Balance at beginning of period	12,588	8,216	9,446	7,367
Charged-off loans	606	1,599	2,457	4,145
Recoveries on charged-off loans	37	37	108	114
Provision/(releases) for loan losses	1,952	1,831	6,874	5,149
Balance at end of period	13,971	8,485	13,971	8,485
Allowance For Loan Losses
Individually evaluated for impairment					279	194
Collectively evaluated for impairment					13,692	8,291
Total	12,588	8,216	9,446	7,367	13,971	8,485
Business Activities Loans | Residential mortgages
Activity in the allowance for loan losses
Balance at beginning of period	8,114	7,453	7,800	7,612
Charged-off loans	42	253	555	1,340
Recoveries on charged-off loans	241	96	270	101
Provision/(releases) for loan losses	241	88	1,039	1,011
Balance at end of period	8,554	7,384	8,554	7,384
Allowance For Loan Losses
Individually evaluated for impairment					136	89
Collectively evaluated for impairment					8,418	7,295
Total	8,114	7,453	7,800	7,612	8,554	7,384
Business Activities Loans | Consumer
Activity in the allowance for loan losses
Balance at beginning of period	6,221	4,723	5,484	4,985
Charged-off loans	1,352	434	2,670	1,175
Recoveries on charged-off loans	39	61	211	183
Provision/(releases) for loan losses	1,473	936	3,356	1,293
Balance at end of period	6,381	5,286	6,381	5,286
Allowance For Loan Losses
Individually evaluated for impairment					39	165
Collectively evaluated for impairment					6,342	5,121
Total	6,221	4,723	5,484	4,985	6,381	5,286
Acquired Loans
Activity in the allowance for loan losses
Balance at beginning of period	4,464	4,273	4,769	4,734
Charged-off loans	429	1,155	2,285	2,300
Recoveries on charged-off loans	210	107	312	433
Provision/(releases) for loan losses	24	1,259	1,473	1,617
Balance at end of period	4,269	4,484	4,269	4,484
Allowance For Loan Losses
Individually evaluated for impairment					111	972
Purchased credit-impaired loans					0	0
Collectively evaluated for impairment					4,158	3,512
Total	4,464	4,273	4,769	4,734	4,269	4,484
Acquired Loans | Commercial real estate
Activity in the allowance for loan losses
Balance at beginning of period	2,356	2,140	2,303	1,903
Charged-off loans	95	662	765	788
Recoveries on charged-off loans	22	0	44	0
Provision/(releases) for loan losses	109	907	810	1,270
Balance at end of period	2,392	2,385	2,392	2,385
Allowance For Loan Losses
Individually evaluated for impairment					46	704
Purchased credit-impaired loans					0	0
Collectively evaluated for impairment					2,346	1,681
Total	2,356	2,140	2,303	1,903	2,392	2,385
Acquired Loans | Commercial and industrial loans
Activity in the allowance for loan losses
Balance at beginning of period	1,014	776	1,164	1,330
Charged-off loans	153	84	634	359
Recoveries on charged-off loans	150	37	151	213
Provision/(releases) for loan losses	(149)	210	181	(245)
Balance at end of period	862	939	862	939
Allowance For Loan Losses
Individually evaluated for impairment					2	121
Purchased credit-impaired loans					0	0
Collectively evaluated for impairment					860	818
Total	1,014	776	1,164	1,330	862	939
Acquired Loans | Residential mortgages
Activity in the allowance for loan losses
Balance at beginning of period	690	881	766	976
Charged-off loans	70	332	285	696
Recoveries on charged-off loans	1	37	39	141
Provision/(releases) for loan losses	49	111	150	276
Balance at end of period	670	697	670	697
Allowance For Loan Losses
Individually evaluated for impairment					19	12
Purchased credit-impaired loans					0	0
Collectively evaluated for impairment					651	685
Total	690	881	766	976	670	697
Acquired Loans | Consumer
Activity in the allowance for loan losses
Balance at beginning of period	404	476	536	525
Charged-off loans	111	77	601	457
Recoveries on charged-off loans	37	33	78	79
Provision/(releases) for loan losses	15	31	332	316
Balance at end of period	345	463	345	463
Allowance For Loan Losses
Individually evaluated for impairment					44	135
Purchased credit-impaired loans					0	0
Collectively evaluated for impairment					301	328
Total	$ 404	$ 476	$ 536	$ 525	$ 345	$ 463

LOAN LOSS ALLOWANCE - Narrative

LOAN LOSS ALLOWANCE - Narrative (Details) $ in Millions	9 Months Ended
	Sep. 30, 2017USD ($)grade
Credit quality information
Allowance for losses on acquired loans under Subtopic ASC 310-30 | $	$ 4.3
Acquired Loans
Credit quality information
Number of grades in internal loan rating system (grade)	11
Residential Mortgages | Mortgages
Credit quality information
Number of grades in internal loan rating system (grade)	3
Residential Mortgages | Mortgages | Pass | Maximum
Credit quality information
Delinquency period of loans based on which risk rating is assigned to loans (in days)	59 days
Residential Mortgages | Mortgages | Special mention | Minimum
Credit quality information
Delinquency period of loans based on which risk rating is assigned to loans (in days)	60 days
Residential Mortgages | Mortgages | Special mention | Maximum
Credit quality information
Delinquency period of loans based on which risk rating is assigned to loans (in days)	89 days
Residential Mortgages | Mortgages | Substandard | Minimum
Credit quality information
Delinquency period of loans based on which risk rating is assigned to loans (in days)	90 days
Consumer Loans | Other
Credit quality information
Number of grades in internal loan rating system (grade)	2
Consumer Loans | Performing | Maximum | Other
Credit quality information
Period within which loans are current, based on which risk rating is assigned (in days)	119 days
Consumer Loans | Nonperforming | Minimum | Other
Credit quality information
Delinquency period of loans based on which risk rating is assigned to loans (in days)	120 days

LOAN LOSS ALLOWANCE - Loans by

LOAN LOSS ALLOWANCE - Loans by Credit Risk Rating (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Credit quality information
Total Loans	$ 6,947,406	$ 6,549,787
Special mention
Credit quality information
Total Loans	37,983	11,802
Substandard
Credit quality information
Total Loans	71,251	95,302
Non Accrual
Credit quality information
Total Loans	22,351	22,240
Classified
Credit quality information
Total Loans	93,602	117,542
Criticized
Credit quality information
Total Loans	131,585	129,344
Commercial Real Estate
Credit quality information
Total Loans	2,671,237	2,616,438
Commercial Real Estate | Construction
Credit quality information
Total Loans	283,549	287,509
Commercial Real Estate | Single and multi-family
Credit quality information
Total Loans	427,094	317,491
Commercial Real Estate | Other
Credit quality information
Total Loans	1,960,594	2,011,438
Commercial and industrial loans | Other
Credit quality information
Total Loans	1,254,947	1,062,038
Residential Mortgages
Credit quality information
Total Loans	1,983,126	1,893,131
Residential Mortgages | Construction
Credit quality information
Total Loans	7,177	11,982
Residential Mortgages | 1-4 family
Credit quality information
Total Loans	1,975,949	1,881,149
Consumer Loans
Credit quality information
Total Loans	1,038,096	978,180
Consumer Loans | Home equity
Credit quality information
Total Loans	385,890	393,800
Consumer Loans | Auto and other
Credit quality information
Total Loans	652,206	584,380
Business Activities Loans
Credit quality information
Total Loans	5,841,115	5,221,307
Business Activities Loans | Special mention
Credit quality information
Total Loans	17,699	7,479
Business Activities Loans | Substandard
Credit quality information
Total Loans	36,162	51,125
Business Activities Loans | Non Accrual
Credit quality information
Total Loans	17,679	16,816
Business Activities Loans | Classified
Credit quality information
Total Loans	53,841	67,941
Business Activities Loans | Criticized
Credit quality information
Total Loans	71,540	75,420
Business Activities Loans | Commercial Real Estate
Credit quality information
Total Loans	2,069,985	1,926,344
Business Activities Loans | Commercial Real Estate | Pass
Credit quality information
Total Loans	2,024,058	1,877,374
Business Activities Loans | Commercial Real Estate | Special mention
Credit quality information
Total Loans	13,133	6,161
Business Activities Loans | Commercial Real Estate | Substandard
Credit quality information
Total Loans	32,794	42,773
Business Activities Loans | Commercial Real Estate | Doubtful
Credit quality information
Total Loans	0	36
Business Activities Loans | Commercial Real Estate | Construction
Credit quality information
Total Loans	265,059	253,302
Business Activities Loans | Commercial Real Estate | Construction | Pass
Credit quality information
Total Loans	265,059	253,302
Business Activities Loans | Commercial Real Estate | Construction | Special mention
Credit quality information
Total Loans	0	0
Business Activities Loans | Commercial Real Estate | Construction | Substandard
Credit quality information
Total Loans	0	0
Business Activities Loans | Commercial Real Estate | Construction | Doubtful
Credit quality information
Total Loans	0	0
Business Activities Loans | Commercial Real Estate | Single and multi-family
Credit quality information
Total Loans	342,426	191,819
Business Activities Loans | Commercial Real Estate | Single and multi-family | Pass
Credit quality information
Total Loans	339,846	189,310
Business Activities Loans | Commercial Real Estate | Single and multi-family | Special mention
Credit quality information
Total Loans	529	334
Business Activities Loans | Commercial Real Estate | Single and multi-family | Substandard
Credit quality information
Total Loans	2,051	2,175
Business Activities Loans | Commercial Real Estate | Single and multi-family | Doubtful
Credit quality information
Total Loans	0	0
Business Activities Loans | Commercial Real Estate | Other
Credit quality information
Total Loans	1,462,500	1,481,223
Business Activities Loans | Commercial Real Estate | Other | Pass
Credit quality information
Total Loans	1,419,153	1,434,762
Business Activities Loans | Commercial Real Estate | Other | Special mention
Credit quality information
Total Loans	12,604	5,827
Business Activities Loans | Commercial Real Estate | Other | Substandard
Credit quality information
Total Loans	30,743	40,598
Business Activities Loans | Commercial Real Estate | Other | Doubtful
Credit quality information
Total Loans	0	36
Business Activities Loans | Commercial and industrial loans
Credit quality information
Total Loans	1,154,988	908,102
Business Activities Loans | Commercial and industrial loans | Other
Credit quality information
Total Loans	1,154,988	908,102
Business Activities Loans | Commercial and industrial loans | Commercial Loan
Credit quality information
Total Loans	1,154,988	908,102
Business Activities Loans | Commercial and industrial loans | Commercial Loan | Pass
Credit quality information
Total Loans	1,136,498	890,974
Business Activities Loans | Commercial and industrial loans | Commercial Loan | Special mention
Credit quality information
Total Loans	2,522	123
Business Activities Loans | Commercial and industrial loans | Commercial Loan | Substandard
Credit quality information
Total Loans	12,981	13,825
Business Activities Loans | Commercial and industrial loans | Commercial Loan | Doubtful
Credit quality information
Total Loans	2,987	3,180
Business Activities Loans | Residential Mortgages
Credit quality information
Total Loans	1,724,093	1,594,972
Business Activities Loans | Residential Mortgages | Construction
Credit quality information
Total Loans	6,933	11,178
Business Activities Loans | Residential Mortgages | 1-4 family
Credit quality information
Total Loans	1,717,160	1,583,794
Business Activities Loans | Residential Mortgages | Mortgages
Credit quality information
Total Loans	1,724,093	1,594,971
Business Activities Loans | Residential Mortgages | Mortgages | Pass
Credit quality information
Total Loans	1,720,604	1,590,091
Business Activities Loans | Residential Mortgages | Mortgages | Special mention
Credit quality information
Total Loans	1,396	701
Business Activities Loans | Residential Mortgages | Mortgages | Substandard
Credit quality information
Total Loans	2,093	4,179
Business Activities Loans | Residential Mortgages | Mortgages | Construction
Credit quality information
Total Loans	6,933	11,178
Business Activities Loans | Residential Mortgages | Mortgages | Construction | Pass
Credit quality information
Total Loans	6,933	11,178
Business Activities Loans | Residential Mortgages | Mortgages | Construction | Special mention
Credit quality information
Total Loans	0	0
Business Activities Loans | Residential Mortgages | Mortgages | Construction | Substandard
Credit quality information
Total Loans	0	0
Business Activities Loans | Residential Mortgages | Mortgages | 1-4 family
Credit quality information
Total Loans	1,717,160	1,583,793
Business Activities Loans | Residential Mortgages | Mortgages | 1-4 family | Pass
Credit quality information
Total Loans	1,713,671	1,578,913
Business Activities Loans | Residential Mortgages | Mortgages | 1-4 family | Special mention
Credit quality information
Total Loans	1,396	701
Business Activities Loans | Residential Mortgages | Mortgages | 1-4 family | Substandard
Credit quality information
Total Loans	2,093	4,179
Business Activities Loans | Consumer Loans
Credit quality information
Total Loans	892,049	791,889
Business Activities Loans | Consumer Loans | Performing
Credit quality information
Total Loans	889,321	788,262
Business Activities Loans | Consumer Loans | Nonperforming
Credit quality information
Total Loans	2,728	3,627
Business Activities Loans | Consumer Loans | Home equity
Credit quality information
Total Loans	290,144	313,521
Business Activities Loans | Consumer Loans | Home equity | Performing
Credit quality information
Total Loans	288,500	310,846
Business Activities Loans | Consumer Loans | Home equity | Nonperforming
Credit quality information
Total Loans	1,644	2,675
Business Activities Loans | Consumer Loans | Auto and other
Credit quality information
Total Loans	601,905	478,368
Business Activities Loans | Consumer Loans | Auto and other | Performing
Credit quality information
Total Loans	600,821	477,416
Business Activities Loans | Consumer Loans | Auto and other | Nonperforming
Credit quality information
Total Loans	1,084	952
Acquired Loans
Credit quality information
Total Loans	1,106,291	1,328,480
Acquired Loans | Special mention
Credit quality information
Total Loans	20,284	4,323
Acquired Loans | Substandard
Credit quality information
Total Loans	35,089	44,177
Acquired Loans | Non Accrual
Credit quality information
Total Loans	4,672	5,424
Acquired Loans | Classified
Credit quality information
Total Loans	39,761	49,601
Acquired Loans | Criticized
Credit quality information
Total Loans	60,045	53,924
Acquired Loans | Commercial Real Estate
Credit quality information
Total Loans	601,252	690,094
Acquired Loans | Commercial Real Estate | Pass
Credit quality information
Total Loans	553,237	649,437
Acquired Loans | Commercial Real Estate | Special mention
Credit quality information
Total Loans	19,803	2,529
Acquired Loans | Commercial Real Estate | Substandard
Credit quality information
Total Loans	28,212	38,128
Acquired Loans | Commercial Real Estate | Construction
Credit quality information
Total Loans	18,490	34,207
Acquired Loans | Commercial Real Estate | Construction | Pass
Credit quality information
Total Loans	17,221	33,461
Acquired Loans | Commercial Real Estate | Construction | Special mention
Credit quality information
Total Loans	570	0
Acquired Loans | Commercial Real Estate | Construction | Substandard
Credit quality information
Total Loans	699	746
Acquired Loans | Commercial Real Estate | Single and multi-family
Credit quality information
Total Loans	84,668	125,672
Acquired Loans | Commercial Real Estate | Single and multi-family | Pass
Credit quality information
Total Loans	81,935	119,414
Acquired Loans | Commercial Real Estate | Single and multi-family | Special mention
Credit quality information
Total Loans	607	907
Acquired Loans | Commercial Real Estate | Single and multi-family | Substandard
Credit quality information
Total Loans	2,126	5,351
Acquired Loans | Commercial Real Estate | Other
Credit quality information
Total Loans	498,094	530,215
Acquired Loans | Commercial Real Estate | Other | Pass
Credit quality information
Total Loans	454,081	496,562
Acquired Loans | Commercial Real Estate | Other | Special mention
Credit quality information
Total Loans	18,626	1,622
Acquired Loans | Commercial Real Estate | Other | Substandard
Credit quality information
Total Loans	25,387	32,031
Acquired Loans | Commercial and industrial loans
Credit quality information
Total Loans	99,959	153,936
Acquired Loans | Commercial and industrial loans | Other
Credit quality information
Total Loans	99,959	153,936
Acquired Loans | Commercial and industrial loans | Commercial Loan
Credit quality information
Total Loans	99,959	153,936
Acquired Loans | Commercial and industrial loans | Commercial Loan | Pass
Credit quality information
Total Loans	95,098	147,102
Acquired Loans | Commercial and industrial loans | Commercial Loan | Special mention
Credit quality information
Total Loans	51	1,260
Acquired Loans | Commercial and industrial loans | Commercial Loan | Substandard
Credit quality information
Total Loans	4,810	5,574
Acquired Loans | Residential Mortgages
Credit quality information
Total Loans	259,033	298,159
Acquired Loans | Residential Mortgages | Construction
Credit quality information
Total Loans	244	804
Acquired Loans | Residential Mortgages | 1-4 family
Credit quality information
Total Loans	258,789	297,355
Acquired Loans | Residential Mortgages | Mortgages
Credit quality information
Total Loans	259,033	298,159
Acquired Loans | Residential Mortgages | Mortgages | Pass
Credit quality information
Total Loans	253,658	295,787
Acquired Loans | Residential Mortgages | Mortgages | Special mention
Credit quality information
Total Loans	398	343
Acquired Loans | Residential Mortgages | Mortgages | Substandard
Credit quality information
Total Loans	4,977	2,029
Acquired Loans | Residential Mortgages | Mortgages | Construction
Credit quality information
Total Loans	244	804
Acquired Loans | Residential Mortgages | Mortgages | Construction | Pass
Credit quality information
Total Loans	244	804
Acquired Loans | Residential Mortgages | Mortgages | Construction | Special mention
Credit quality information
Total Loans	0	0
Acquired Loans | Residential Mortgages | Mortgages | Construction | Substandard
Credit quality information
Total Loans	0	0
Acquired Loans | Residential Mortgages | Mortgages | 1-4 family
Credit quality information
Total Loans	258,789	297,355
Acquired Loans | Residential Mortgages | Mortgages | 1-4 family | Pass
Credit quality information
Total Loans	253,414	294,983
Acquired Loans | Residential Mortgages | Mortgages | 1-4 family | Special mention
Credit quality information
Total Loans	398	343
Acquired Loans | Residential Mortgages | Mortgages | 1-4 family | Substandard
Credit quality information
Total Loans	4,977	2,029
Acquired Loans | Consumer Loans
Credit quality information
Total Loans	146,047	186,291
Acquired Loans | Consumer Loans | Performing
Credit quality information
Total Loans	144,426	184,879
Acquired Loans | Consumer Loans | Nonperforming
Credit quality information
Total Loans	1,621	1,412
Acquired Loans | Consumer Loans | Home equity
Credit quality information
Total Loans	95,746	80,279
Acquired Loans | Consumer Loans | Home equity | Performing
Credit quality information
Total Loans	94,526	79,762
Acquired Loans | Consumer Loans | Home equity | Nonperforming
Credit quality information
Total Loans	1,220	517
Acquired Loans | Consumer Loans | Auto and other
Credit quality information
Total Loans	50,301	106,012
Acquired Loans | Consumer Loans | Auto and other | Performing
Credit quality information
Total Loans	49,900	105,117
Acquired Loans | Consumer Loans | Auto and other | Nonperforming
Credit quality information
Total Loans	$ 401	$ 895

DEPOSITS (Details)

DEPOSITS (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Deposits [Abstract]
Time less than $250,000	$ 2,200,338	$ 2,015,332
Time $250,000 or more	373,285	318,211
Total time deposits	2,573,623	2,333,543
Brokered time deposits	1,100,000	900,000
Reciprocal deposits	$ 97,400	$ 113,400

BORROWED FUNDS - Summary of Bor

BORROWED FUNDS - Summary of Borrowed Funds (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Short-term borrowings	$ 1,061,300	$ 1,082,044
Long-term borrowings	427,349	231,953
Total borrowings	$ 1,488,649	$ 1,313,997
Weighted average rate on short-term borrowings (as percent)	1.27%	0.72%
Weighted average rate on long-term borrowings (as percent)	2.50%	3.35%
Weighted average rate (as percent)	1.63%	1.19%
Advances from the FHLB
Debt Instrument [Line Items]
Short-term borrowings	$ 1,061,300	$ 1,072,044
Long-term borrowings	$ 338,054	$ 142,792
Weighted average rate on short-term borrowings (as percent)	1.27%	0.71%
Weighted average rate on long-term borrowings (as percent)	1.49%	1.53%
Other borrowings
Debt Instrument [Line Items]
Short-term borrowings	$ 0	$ 10,000
Weighted average rate on short-term borrowings (as percent)	0.00%	2.42%
Subordinated borrowings
Debt Instrument [Line Items]
Long-term borrowings	$ 73,831	$ 73,697
Weighted average rate on long-term borrowings (as percent)	7.00%	7.00%
Junior subordinated borrowings
Debt Instrument [Line Items]
Long-term borrowings	$ 15,464	$ 15,464
Weighted average rate on long-term borrowings (as percent)	3.16%	2.77%

BORROWED FUNDS - Narrative (Det

BORROWED FUNDS - Narrative (Details) - USD ($)	1 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Line of credit, current		$ 3,000,000
Short-term debt		1,061,300,000	$ 1,082,044,000
Long-term borrowings		427,349,000	231,953,000
Advances from the FHLB
Debt Instrument [Line Items]
Long-term line of credit		0	0
Short-term debt		1,061,300,000	1,072,044,000
Long-term borrowings		338,054,000	142,792,000
Federal Reserve Bank Advances
Debt Instrument [Line Items]
Short-term debt		0	0
Federal Home Loan Bank Certificates And Obligations F H L B Callable Advances
Debt Instrument [Line Items]
Long-term borrowings		4,000,000	11,000,000
Federal Home Loan Bank Certificates And Obligations F H L B Amortizing Advances
Debt Instrument [Line Items]
Long-term borrowings		1,100,000	1,200,000
Subordinated borrowings
Debt Instrument [Line Items]
Long-term borrowings		73,831,000	73,697,000
Maturity period (in years)	15 years
Principal amount of debt issued	$ 75,000,000
Discount rate (as a percent)	1.15%
Fixed interest rate (as percent)	6.875%
Maturity period with fixed interest rate (in months)	10 years
Subordinated borrowings | Three-month LIBOR rate
Debt Instrument [Line Items]
Interest rate margin (as percent)	5.113%
Unamortized debt issuance expense		614,000	706,000
Junior subordinated borrowings
Debt Instrument [Line Items]
Long-term borrowings		$ 15,464,000	$ 15,464,000
Junior subordinated borrowings | Trust I
Debt Instrument [Line Items]
Common stock of trust (as percent)		100.00%
Common stock of trust included in other asset		$ 500,000
Sole asset of trust in form of debt		$ 15,500,000
Variable interest rate (as percent)		3.16%	2.77%
Period up to which interest payments can be deferred (in years)		5 years
Junior subordinated borrowings | LIBOR | Trust I
Debt Instrument [Line Items]
Interest rate margin (as percent)		1.85%

BORROWED FUNDS - Summary of Mat

BORROWED FUNDS - Summary of Maturities of FHLB (Details) - Fixed rate advances $ in Thousands	Sep. 30, 2017USD ($)
Principal
2,017	$ 1,018,565
2,018	218,836
2,019	150,000
2,020	4,464
2021 and beyond	7,489
Total FHLB advances	$ 1,399,354
Weighted Average
Weighted Average Rate (as a percent)
2,017	1.28%
2,018	1.28%
2,019	1.64%
2,020	1.94%
2021 and beyond	2.69%
Total FHLB advances	1.33%

CAPITAL RATIOS AND SHAREHOLDE58

CAPITAL RATIOS AND SHAREHOLDERS' EQUITY - Actual and Required Capital Ratios (Details)	Sep. 30, 2017	Dec. 31, 2016
Tier 1 capital to risk-weighted assets
Total capital to risk weighted assets	14.30%	11.90%
Common equity tier 1 capital to risk weighted assets	12.30%	9.90%
Tier 1 capital to risk weighted assets	12.50%	10.10%
Tier 1 capital to average assets	9.50%	7.90%
Regulatory minimum to be well capitalized, Total capital to risk weighted assets (as percent)	10.00%	10.00%
Regulatory minimum to be well capitalized, Common equity tier 1 capital to risk weighted assets (as percent)	6.50%	6.50%
Regulatory minimum to be well capitalized, Tier 1 capital to risk weighted assets (as percent)	8.00%	8.00%
Regulatory minimum to be well capitalized, Tier 1 capital to average assets (as percent)	5.00%	5.00%
Bank
Tier 1 capital to risk-weighted assets
Total capital to risk weighted assets	11.70%	11.20%
Common equity tier 1 capital to risk weighted assets	10.40%	10.00%
Tier 1 capital to risk weighted assets	10.40%	10.00%
Tier 1 capital to average assets	8.00%	7.80%
Regulatory minimum to be well capitalized, Total capital to risk weighted assets (as percent)	10.00%	10.00%
Regulatory minimum to be well capitalized, Common equity tier 1 capital to risk weighted assets (as percent)	6.50%	6.50%
Regulatory minimum to be well capitalized, Tier 1 capital to risk weighted assets (as percent)	8.00%	8.00%
Regulatory minimum to be well capitalized, Tier 1 capital to average assets (as percent)	5.00%	5.00%

CAPITAL RATIOS AND SHAREHOLDE59

CAPITAL RATIOS AND SHAREHOLDERS' EQUITY - Components of AOCI (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
Total shareholders’ equity	$ 1,284,527		$ 1,093,298	$ 932,593		$ 887,189
Accumulated other comprehensive income
Total shareholders’ equity	11,187	$ 10,331	9,766	8,411	$ 10,213	(3,305)
Net unrealized holding gain on AFS securities
Other accumulated comprehensive income (loss), before tax	21,132		25,176
Income taxes related to items of accumulated other comprehensive income	(8,155)		(9,636)
Total shareholders’ equity	12,977	12,121	15,540	17,189	20,625	3,880
Net unrealized loss on cash flow hedging derivatives
Other accumulated comprehensive income (loss), before tax	0		(6,573)
Income taxes related to items of accumulated other comprehensive income	0		2,589
Total shareholders’ equity	0	0	(3,984)	(6,701)	(8,335)	(5,108)
Net unrealized holding loss on pension plans
Other accumulated comprehensive income (loss), before tax	(2,954)		(2,954)
Income taxes related to items of accumulated other comprehensive income	1,164		1,164
Total shareholders’ equity	$ (1,790)	$ (1,790)	$ (1,790)	$ (2,077)	$ (2,077)	$ (2,077)

CAPITAL RATIOS AND SHAREHOLDE60

CAPITAL RATIOS AND SHAREHOLDERS' EQUITY - Components of OCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net unrealized holding gain
Net of Tax	$ 855	$ (2,570)	$ 5,023	$ 10,188
Less: reclassification adjustment for gains (losses) realized in net income
Net of Tax	(1)	(768)	3,602	(1,528)
Other comprehensive income
Before Tax	1,461	(2,924)	2,529	18,979
Tax Effect	(605)	1,122	(1,108)	(7,263)
Total other comprehensive income/(loss)	856	(1,802)	1,421	11,716
Realized (losses)/gains on AFS securities:
Net unrealized holding gain
Before Tax	1,460	(5,576)	8,524	21,740
Tax Effect	(605)	2,190	(3,232)	(8,366)
Net of Tax	855	(3,386)	5,292	13,374
Less: reclassification adjustment for gains (losses) realized in net income
Before Tax	(1)	78	12,568	101
Tax Effect	0	(28)	(4,713)	(36)
Net of Tax	(1)	50	7,855	65
Other comprehensive income
Before Tax	1,461	(5,654)	(4,044)	21,639
Tax Effect	(605)	2,218	1,481	(8,330)
Total other comprehensive income/(loss)	856	(3,436)	(2,563)	13,309
Realized (losses) on cash flow hedging derivatives:
Net unrealized holding gain
Before Tax	0	1,363	(449)	(5,322)
Tax Effect	0	(547)	180	2,136
Net of Tax	0	816	(269)	(3,186)
Less: reclassification adjustment for gains (losses) realized in net income
Before Tax	0	(1,367)	(7,022)	(2,662)
Tax Effect	0	549	2,769	1,069
Net of Tax	0	(818)	(4,253)	(1,593)
Other comprehensive income
Before Tax	0	2,730	6,573	(2,660)
Tax Effect	0	(1,096)	(2,589)	1,067
Total other comprehensive income/(loss)	$ 0	$ 1,634	$ 3,984	$ (1,593)

CAPITAL RATIOS AND SHAREHOLDE61

CAPITAL RATIOS AND SHAREHOLDERS' EQUITY - Changes in AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at Beginning of Period			$ 1,093,298	$ 887,189
Other comprehensive gain (loss) before reclassifications	$ 855	$ (2,570)	5,023	10,188
Less: amounts reclassified from accumulated other comprehensive income (loss)	(1)	(768)	3,602	(1,528)
Total other comprehensive income/(loss)	856	(1,802)	1,421	11,716
Balance at End of Period	1,284,527	932,593	1,284,527	932,593
Net unrealized holding gain on AFS securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at Beginning of Period	12,121	20,625	15,540	3,880
Other comprehensive gain (loss) before reclassifications	855	(3,386)	5,292	13,374
Less: amounts reclassified from accumulated other comprehensive income (loss)	(1)	50	7,855	65
Total other comprehensive income/(loss)	856	(3,436)	(2,563)	13,309
Balance at End of Period	12,977	17,189	12,977	17,189
Net unrealized loss on cash flow hedging derivatives
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at Beginning of Period	0	(8,335)	(3,984)	(5,108)
Other comprehensive gain (loss) before reclassifications	0	816	(269)	(3,186)
Less: amounts reclassified from accumulated other comprehensive income (loss)	0	(818)	(4,253)	(1,593)
Total other comprehensive income/(loss)	0	1,634	3,984	(1,593)
Balance at End of Period	0	(6,701)	0	(6,701)
Net unrealized holding loss on pension plans
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at Beginning of Period	(1,790)	(2,077)	(1,790)	(2,077)
Other comprehensive gain (loss) before reclassifications	0	0	0	0
Less: amounts reclassified from accumulated other comprehensive income (loss)	0	0	0	0
Total other comprehensive income/(loss)	0	0	0	0
Balance at End of Period	(1,790)	(2,077)	(1,790)	(2,077)
Accumulated other comprehensive (loss) income
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at Beginning of Period	10,331	10,213	9,766	(3,305)
Total other comprehensive income/(loss)			1,421	11,716
Balance at End of Period	$ 11,187	$ 8,411	$ 11,187	$ 8,411

CAPITAL RATIOS AND SHAREHOLDE62

CAPITAL RATIOS AND SHAREHOLDERS' EQUITY - Amounts Reclassified Out of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Amounts reclassified out of each component of accumulated other comprehensive income
Non-interest income	$ 28,836	$ 18,941	$ 96,391	$ 49,126
Interest expense	(17,062)	(12,540)	(46,006)	(34,896)
Non-interest expense	(65,820)	(48,844)	(209,669)	(142,212)
Tax (expense) benefit	(7,211)	(6,953)	(22,210)	(18,422)
Net income	22,903	16,381	58,057	48,339
Amount Reclassified From Accumulated Other Comprehensive Income (loss)
Amounts reclassified out of each component of accumulated other comprehensive income
Net income	(1)	(768)	3,602	(1,528)
Realized (losses)/gains on AFS securities: | Amount Reclassified From Accumulated Other Comprehensive Income (loss)
Amounts reclassified out of each component of accumulated other comprehensive income
Non-interest income	(1)	78	12,568	101
Tax (expense) benefit	0	(28)	(4,713)	(36)
Net income	(1)	50	7,855	65
Realized (losses) on cash flow hedging derivatives: | Amount Reclassified From Accumulated Other Comprehensive Income (loss)
Amounts reclassified out of each component of accumulated other comprehensive income
Non-interest income	0	(1,367)	(6,629)	0
Interest expense			(393)	0
Non-interest expense			0	(2,662)
Tax (expense) benefit	0	549	2,769	1,069
Net income	$ 0	$ (818)	$ (4,253)	$ (1,593)

EARNINGS PER SHARE - Schedule o

EARNINGS PER SHARE - Schedule of Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings per share
Net income	$ 22,903	$ 16,381	$ 58,057	$ 48,339
Average number of common shares issued (in shares)	41,370	32,273	38,958	32,216
Less: average number of treasury shares (in shares)	947	1,137	970	1,117
Less: average number of unvested stock award shares (in shares)	439	515	441	515
Average number of basic common shares outstanding (in shares)	39,984	30,621	37,547	30,584
Average number of diluted common shares outstanding (in shares)	40,145	30,811	37,708	30,757
Earnings per share:
Basic (in dollars per share)	$ 0.57	$ 0.53	$ 1.55	$ 1.58
Diluted (in dollars per share)	$ 0.57	$ 0.53	$ 1.54	$ 1.57
Unvested Stock Award shares
Earnings per share
Plus: dilutive effect of share-based payment arrangements (in shares)	116	131	116	115
Options
Earnings per share
Plus: dilutive effect of share-based payment arrangements (in shares)	45	59	45	58

EARNINGS PER SHARE - Narrative

EARNINGS PER SHARE - Narrative (Details) - shares shares in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Unvested Stock Award shares
Anti-dilutive securities
Securities excluded from the earnings per share calculations (in shares)	325	401
Options
Anti-dilutive securities
Securities excluded from the earnings per share calculations (in shares)	46	201

STOCK-BASED COMPENSATION PLAN65

STOCK-BASED COMPENSATION PLANS (Details) - $ / shares shares in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Non-Vested Stock Awards Outstanding
Non-vested Stock Awards Outstanding, Number of Shares
Balance at the beginning of the period (in shares)	448
Granted (in shares)	156
Stock awards vested (in shares)	(162)	(116)
Forfeited (in shares)	(10)
Balance at the end of the period (in shares)	432
Non-vested Stock Awards Outstanding, Weighted-Average Grant Date Fair Value
Balance at the beginning of the period (in dollars per share)	$ 26.28
Granted (in dollars per share)	35.60
Stock awards vested (in dollars per share)	25.56
Forfeited (in dollars per share)	29.26
Balance at the end of the period (in dollars per share)	$ 29.64
Stock Options Outstanding
Stock Options Outstanding, Number of Shares
Balance at the beginning of the period (in shares)	109
Stock options exercised (in shares)	(11)
Expired (in shares)	(10)
Balance at the end of the period (in shares)	88
Exercisable options at the end of the period (in shares)	88
Stock Options Outstanding, Weighted-Average Exercise Price
Balance at the beginning of the period (in dollars per share)	$ 15.72
Stock options exercised (in dollars per share)	14.47
Expired (in dollars per share)	33.46
Balance at the end of the period (in dollars per share)	13.86
Exercisable options at the end of the period (in dollars per share)	$ 13.86

STOCK-BASED COMPENSATION PLAN66

STOCK-BASED COMPENSATION PLANS - Narrative (Details) - USD ($) shares in Thousands, $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise of stock options	$ 161	$ 141
Total compensation cost	3,900	3,500
Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise of stock options	$ 161	$ 142
Non-Vested Stock Awards Outstanding
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards vested (in shares)	162	116

DERIVATIVE INSTRUMENTS AND HE67

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Narrative (Details) $ in Thousands	Feb. 07, 2017USD ($)	Sep. 30, 2017USD ($)	Mar. 31, 2017USD ($)contract	Sep. 30, 2016USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2016USD ($)	Dec. 31, 2016USD ($)
Derivative [Line Items]
Notional amount		$ 2,491,341			$ 2,491,341		$ 2,199,862
Cash collateral pledged		1,400			1,400
Amortized cost of securities pledged as collateral to derivative counterparties		26,000			26,000
Fair value of securities as pledged collateral to derivative counterparties		25,900			25,900
Interest expense		17,062		$ 12,540	46,006	$ 34,896
Commercial counterparties
Derivative [Line Items]
Net asset position		11,900			11,900		11,500
Amount Reclassified From Accumulated Other Comprehensive Income (loss) | Accumulated net gain (loss) from cash flow hedges
Derivative [Line Items]
Interest expense	$ 6,600
Interest rate swaps
Derivative [Line Items]
Notional amount		10,900			10,900
Cash collateral pledged		1,410			1,410		650
Derivative liability		13,790			13,790		19,772
Amount of collateral posted for the net liability positions		10,500			10,500		19,800
Interest rate swaps | Commercial counterparties
Derivative [Line Items]
Cash collateral pledged		0			0		0
Derivative liability		3,337			3,337		4,384
Interest rate swaps | Institutional counterparties
Derivative [Line Items]
Cash collateral pledged		1,410			1,410		650
Derivative liability		10,453			10,453		15,388
Not Designated as Hedging Instrument
Derivative [Line Items]
Notional amount		310,327			310,327		$ 208,145
Economic hedges
Derivative [Line Items]
Notional amount		2,200,000			2,200,000
Credit valuation adjustments		$ (53)			$ (53)
Economic hedges | Tax advantaged economic development bonds
Derivative [Line Items]
Fixed rate of interest (as percent)		5.09%			5.09%
Maturity period (in years)					21 years
Economic hedges | Interest rate swaps
Derivative [Line Items]
Notional amount		$ 1,600,000			$ 1,600,000
Economic hedges | Risk participation agreements with dealer banks
Derivative [Line Items]
Notional amount		100,000			100,000
Economic hedges | Forward sale commitments
Derivative [Line Items]
Notional amount		500,000			500,000
Cash flow hedges
Derivative [Line Items]
Durations of derivative instruments (in years)			3 years
Amount of ineffectiveness		$ 0		$ 0	$ 0	$ 0
Cash flow hedges | Interest rate swaps
Derivative [Line Items]
Number of instruments (contract) | contract			6
Cash flow hedges | Interest rate swaps | FHLB borrowings
Derivative [Line Items]
Notional amount	$ 300,000		$ 300,000

DERIVATIVE INSTRUMENTS AND HE68

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Derivative Assets and Liabilities (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016	Mar. 31, 2017	Feb. 07, 2017
Interest rate swap agreements and non-hedging derivative assets and liabilities
Notional amount	$ 2,491,341	$ 2,199,862
Estimated fair value asset (liability)	5,136	(2,804)
Interest rate swaps
Interest rate swap agreements and non-hedging derivative assets and liabilities
Notional amount	10,900
Total cash flow hedges | Interest rate swaps | FHLB borrowings
Interest rate swap agreements and non-hedging derivative assets and liabilities
Notional amount			$ 300,000	$ 300,000
Total economic hedges
Interest rate swap agreements and non-hedging derivative assets and liabilities
Notional amount	2,200,000
Total economic hedges | Interest rate swaps
Interest rate swap agreements and non-hedging derivative assets and liabilities
Notional amount	1,600,000
Total economic hedges | Risk participation agreements with dealer banks
Interest rate swap agreements and non-hedging derivative assets and liabilities
Notional amount	100,000
Total economic hedges | Forward sale commitments
Interest rate swap agreements and non-hedging derivative assets and liabilities
Notional amount	500,000
Designated as Hedging Instrument | Total cash flow hedges
Interest rate swap agreements and non-hedging derivative assets and liabilities
Notional amount	0	300,000
Estimated fair value asset (liability)	0	(6,573)
Designated as Hedging Instrument | Total cash flow hedges | Interest rate swaps | FHLB borrowings
Interest rate swap agreements and non-hedging derivative assets and liabilities
Notional amount	$ 0	$ 300,000
Weighted average maturity		2 years 3 months 18 days
Weighted average rate, received (as percent)	0.00%	0.63%
Weighted average rate, contract pay rate (as percent)	0.00%	2.29%
Estimated fair value asset (liability)	$ 0	$ (6,573)
Designated as Hedging Instrument | Total economic hedges
Interest rate swap agreements and non-hedging derivative assets and liabilities
Notional amount	2,181,014	1,691,717
Estimated fair value asset (liability)	(1,319)	(969)
Designated as Hedging Instrument | Total economic hedges | Interest rate swaps | Tax advantaged economic development bonds
Interest rate swap agreements and non-hedging derivative assets and liabilities
Notional amount	$ 10,916	$ 11,386
Weighted average maturity	12 years 2 months 24 days	12 years 10 months 24 days
Weighted average rate, received (as percent)	1.60%	0.98%
Weighted average rate, contract pay rate (as percent)	5.09%	5.09%
Estimated fair value asset (liability)	$ (1,827)	$ (2,021)
Designated as Hedging Instrument | Total economic hedges | Interest rate swaps | Loans with commercial loan customers
Interest rate swap agreements and non-hedging derivative assets and liabilities
Notional amount	$ 796,914	$ 668,541
Weighted average maturity	6 years 1 month 1 day	6 years 2 months 12 days
Weighted average rate, received (as percent)	3.09%	2.43%
Weighted average rate, contract pay rate (as percent)	4.19%	4.21%
Estimated fair value asset (liability)	$ (8,576)	$ (6,752)
Designated as Hedging Instrument | Total economic hedges | Reverse interest rate swaps | Loans with commercial loan customers
Interest rate swap agreements and non-hedging derivative assets and liabilities
Notional amount	$ 796,914	$ 668,541
Weighted average maturity	6 years 1 month 1 day	6 years 2 months 12 days
Weighted average rate, received (as percent)	4.19%	4.21%
Weighted average rate, contract pay rate (as percent)	3.09%	2.43%
Estimated fair value asset (liability)	$ 8,572	$ 7,077
Designated as Hedging Instrument | Total economic hedges | Risk participation agreements with dealer banks
Interest rate swap agreements and non-hedging derivative assets and liabilities
Notional amount	$ 117,067	$ 83,360
Weighted average maturity	9 years 4 months 30 days	11 years 6 months 20 days
Estimated fair value asset (liability)	$ 12	$ 5
Designated as Hedging Instrument | Total economic hedges | Forward sale commitments
Interest rate swap agreements and non-hedging derivative assets and liabilities
Notional amount	$ 459,203	$ 259,889
Weighted average maturity	2 months 12 days	2 months 12 days
Estimated fair value asset (liability)	$ 500	$ 722
Not Designated as Hedging Instrument
Interest rate swap agreements and non-hedging derivative assets and liabilities
Notional amount	310,327	208,145
Estimated fair value asset (liability)	6,455	4,738
Not Designated as Hedging Instrument | Commitments to lend
Interest rate swap agreements and non-hedging derivative assets and liabilities
Notional amount	$ 310,327	$ 208,145
Weighted average maturity	2 months 12 days	2 months 12 days
Estimated fair value asset (liability)	$ 6,455	$ 4,738

DERIVATIVE INSTRUMENTS AND HE69

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Interest Rate Derivatives (Details) - FHLB borrowings - Interest rate swaps - Total cash flow hedges - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Derivative [Line Items]
Unrealized (loss) recognized in accumulated other comprehensive loss	$ 0	$ 1,363	$ (449)	$ (5,322)
Net tax (expense) benefit on items recognized in accumulated other comprehensive income	0	(1,096)	(2,589)	1,067
Other comprehensive gain (loss) recorded in accumulated other comprehensive income, net of reclassification adjustments and tax effects	0	1,634	3,984	(1,593)
Interest Expense
Derivative [Line Items]
Less: reclassification of unrealized (loss) from accumulated other comprehensive income to interest expense	0	(1,367)	(393)	(2,662)
Other non-interest expense
Derivative [Line Items]
Less: reclassification of unrealized (loss) from accumulated other comprehensive income to interest expense	$ 0	$ 0	$ (6,629)	$ 0

DERIVATIVE INSTRUMENTS AND HE70

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Economic Hedges and Non-hedging Derivatives (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Interest rate swaps | Economic hedges | Industrial revenue bond
Derivative [Line Items]
Unrealized gain (loss) recognized in other non-interest income	$ 70	$ 29	$ 194	$ (802)
Interest rate swaps | Economic hedges | Loans with commercial loan customers
Derivative [Line Items]
Unrealized gain (loss) recognized in other non-interest income	(142)	2,411	(1,824)	(18,911)
Reverse interest rate swaps | Economic hedges | Loans with commercial loan customers
Derivative [Line Items]
Unrealized gain (loss) recognized in other non-interest income	142	(2,411)	1,824	18,911
(Unfavorable) Favorable change in credit valuation adjustment recognized in other non-interest income	(53)	(62)	(329)	(495)
Risk participation agreements with dealer banks | Economic hedges
Derivative [Line Items]
Unrealized gain (loss) recognized in other non-interest income	2	(14)	7	102
Forward sale commitments | Economic hedges
Derivative [Line Items]
Unrealized gain (loss) recognized in other non-interest income	500	(582)	224	(1,898)
Realized gain (loss) in other non-interest income	(983)	109	(3,651)	(224)
Commitments to lend | Non-hedging derivatives
Derivative [Line Items]
Unrealized gain (loss) recognized in other non-interest income	6,455	1,574	21,891	3,635
Realized gain (loss) in other non-interest income	$ 7,402	$ 760	$ 23,869	$ 2,505

DERIVATIVE INSTRUMENTS AND HE71

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Offsetting of Financial Assets and Derivative Assets (Details) - Interest rate swaps - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Offsetting of Financial Assets and Derivative Assets
Gross amounts of recognized assets	$ 11,972	$ 11,510
Gross amounts offset in the Statements of Condition	0	0
Net amounts of assets presented in the Statements of Condition	11,972	11,510
Gross amounts not offset in the Statements of Condition, financial instruments	0	0
Gross amounts not offset in the Statements of Condition, cash collateral received	0	0
Net amount	11,972	11,510
Institutional counterparties
Offsetting of Financial Assets and Derivative Assets
Gross amounts of recognized assets	63	49
Gross amounts offset in the Statements of Condition	0	0
Net amounts of assets presented in the Statements of Condition	63	49
Gross amounts not offset in the Statements of Condition, financial instruments	0	0
Gross amounts not offset in the Statements of Condition, cash collateral received	0	0
Net amount	63	49
Commercial counterparties
Offsetting of Financial Assets and Derivative Assets
Gross amounts of recognized assets	11,909	11,461
Gross amounts offset in the Statements of Condition	0	0
Net amounts of assets presented in the Statements of Condition	11,909	11,461
Gross amounts not offset in the Statements of Condition, financial instruments	0	0
Gross amounts not offset in the Statements of Condition, cash collateral received	0	0
Net amount	$ 11,909	$ 11,461

DERIVATIVE INSTRUMENTS AND HE72

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Offsetting Financial Liabilities and Derivative Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Offsetting of Financial Liabilities and Derivative Liabilities
Gross amounts not offset in the Statements of Condition, cash collateral pledged	$ 1,400
Interest rate swaps
Offsetting of Financial Liabilities and Derivative Liabilities
Gross amounts of recognized liabilities	(17,272)	$ (24,484)
Gross amounts offset in the Statements of Condition	3,482	4,712
Net amounts of liabilities presented in the Statements of Condition	(13,790)	(19,772)
Gross amounts not offset in the Statements of Condition, financial instruments	9,043	14,738
Gross amounts not offset in the Statements of Condition, cash collateral pledged	1,410	650
Net amount	(3,337)	(4,384)
Interest rate swaps | Institutional counterparties
Offsetting of Financial Liabilities and Derivative Liabilities
Gross amounts of recognized liabilities	(13,903)	(20,077)
Gross amounts offset in the Statements of Condition	3,450	4,689
Net amounts of liabilities presented in the Statements of Condition	(10,453)	(15,388)
Gross amounts not offset in the Statements of Condition, financial instruments	9,043	14,738
Gross amounts not offset in the Statements of Condition, cash collateral pledged	1,410	650
Net amount	0	0
Interest rate swaps | Commercial counterparties
Offsetting of Financial Liabilities and Derivative Liabilities
Gross amounts of recognized liabilities	(3,369)	(4,407)
Gross amounts offset in the Statements of Condition	32	23
Net amounts of liabilities presented in the Statements of Condition	(3,337)	(4,384)
Gross amounts not offset in the Statements of Condition, financial instruments	0	0
Gross amounts not offset in the Statements of Condition, cash collateral pledged	0	0
Net amount	$ (3,337)	$ (4,384)

FAIR VALUE MEASUREMENTS - Measu

FAIR VALUE MEASUREMENTS - Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading security, at fair value	$ 12,603	$ 13,229
Securities available for sale, at fair value	1,341,013	1,209,537
Total Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading security, at fair value	12,603	13,229
Securities available for sale, at fair value	1,341,013	1,209,537
Loans held for sale	143,745	120,673
Derivative assets	22,334	21,617
Derivative liabilities	17,198	24,420
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading security, at fair value	0	0
Securities available for sale, at fair value	45,055	62,284
Loans held for sale	0	0
Derivative assets	518	622
Derivative liabilities	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading security, at fair value	0	0
Securities available for sale, at fair value	1,295,958	1,147,253
Loans held for sale	143,745	120,673
Derivative assets	15,379	16,157
Derivative liabilities	17,198	24,420
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading security, at fair value	12,603	13,229
Securities available for sale, at fair value	0	0
Loans held for sale	0	0
Derivative assets	6,437	4,838
Derivative liabilities	0	0
Recurring | Total Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading security, at fair value	12,603	13,229
Loans held for sale	143,745	120,673
Derivative assets	22,334	21,617
Capitalized servicing rights	2,707	798
Derivative liabilities	17,198	24,420
Recurring | Total Fair Value | Debt securities | Municipal bonds and obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	118,760	119,816
Recurring | Total Fair Value | Debt securities | Agency collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	807,436	651,911
Recurring | Total Fair Value | Debt securities | Agency residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	217,067	228,684
Recurring | Total Fair Value | Debt securities | Agency commercial mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	63,044	64,534
Recurring | Total Fair Value | Debt securities | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	67,234	56,006
Recurring | Total Fair Value | Debt securities | Trust preferred securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	11,792	11,887
Recurring | Total Fair Value | Debt securities | Other bonds and obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	10,291	11,158
Recurring | Total Fair Value | Marketable equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	45,389	65,541
Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading security, at fair value	0	0
Loans held for sale	0	0
Derivative assets	518	622
Capitalized servicing rights	0	0
Derivative liabilities	0	0
Recurring | Level 1 | Debt securities | Municipal bonds and obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	0	0
Recurring | Level 1 | Debt securities | Agency collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	0	0
Recurring | Level 1 | Debt securities | Agency residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	0	0
Recurring | Level 1 | Debt securities | Agency commercial mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	0	0
Recurring | Level 1 | Debt securities | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	0	0
Recurring | Level 1 | Debt securities | Trust preferred securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	0	0
Recurring | Level 1 | Debt securities | Other bonds and obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	0	0
Recurring | Level 1 | Marketable equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	45,055	62,284
Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading security, at fair value	0	0
Loans held for sale	143,745	120,673
Derivative assets	15,379	16,157
Capitalized servicing rights	0	0
Derivative liabilities	17,198	24,420
Recurring | Level 2 | Debt securities | Municipal bonds and obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	118,760	119,816
Recurring | Level 2 | Debt securities | Agency collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	807,436	651,911
Recurring | Level 2 | Debt securities | Agency residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	217,067	228,684
Recurring | Level 2 | Debt securities | Agency commercial mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	63,044	64,534
Recurring | Level 2 | Debt securities | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	67,234	56,006
Recurring | Level 2 | Debt securities | Trust preferred securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	11,792	11,887
Recurring | Level 2 | Debt securities | Other bonds and obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	10,291	11,158
Recurring | Level 2 | Marketable equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	334	3,257
Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading security, at fair value	12,603	13,229
Loans held for sale	0	0
Derivative assets	6,437	4,838
Capitalized servicing rights	2,707	798
Derivative liabilities	0	0
Recurring | Level 3 | Debt securities | Municipal bonds and obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	0	0
Recurring | Level 3 | Debt securities | Agency collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	0	0
Recurring | Level 3 | Debt securities | Agency residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	0	0
Recurring | Level 3 | Debt securities | Agency commercial mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	0	0
Recurring | Level 3 | Debt securities | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	0	0
Recurring | Level 3 | Debt securities | Trust preferred securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	0	0
Recurring | Level 3 | Debt securities | Other bonds and obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	0	0
Recurring | Level 3 | Marketable equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	$ 0	$ 0

FAIR VALUE MEASUREMENTS - Narra

FAIR VALUE MEASUREMENTS - Narrative (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017USD ($)	Sep. 30, 2016USD ($)	Sep. 30, 2017USD ($)security	Sep. 30, 2016USD ($)transfer
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Transfers out of Level 3, number of transfers | transfer				1
Transfers to Level 2				$ 708
Junior subordinated debentures re-price period (in days)			90 days
Loans Held for Sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gains (losses) in fair value of loans held for sale included in earnings	$ (400)	$ (200)	$ 2,000	$ 400
Trading Security
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of securities in the portfolio (security) | security			1

FAIR VALUE MEASUREMENTS - Loans

FAIR VALUE MEASUREMENTS - Loans Held for Sale (Details) - Level 2 - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Loans Held for Sale
Aggregate Fair Value	$ 143,745	$ 120,673
Aggregate Unpaid Principal	322	322
Recurring
Loans Held for Sale
Aggregate Fair Value	143,745	120,673
Recurring | Loans Held for Sale
Loans Held for Sale
Aggregate Fair Value	143,745	120,673
Aggregate Unpaid Principal	139,298	118,178
Aggregate Fair Value Less Aggregate Unpaid Principal	$ 4,447	$ 2,495

FAIR VALUE MEASUREMENTS - Chang

FAIR VALUE MEASUREMENTS - Changes in Level 3 (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Changes in Level 3 assets that were measured at fair value on a recurring basis
Transfers to Level 2				$ (708)
Commitments to lend
Changes in Level 3 assets that were measured at fair value on a recurring basis
Unrealized gains (losses) relating to instruments still held at the end of the period	$ 6,455	$ 1,574	$ 6,455	1,574
Derivative Asset (Liability)
Beginning balance	7,374	1,259	4,738	323
Unrealized (loss) gain, net recognized in other non-interest income	15,146	3,563	48,963	6,480
Transfers to held for sale loans	(16,065)	(3,248)	(47,246)	(5,229)
Ending balance	6,455	1,574	6,455	1,574
Forward Commitments
Changes in Level 3 assets that were measured at fair value on a recurring basis
Unrealized gains (losses) relating to instruments still held at the end of the period	(18)	(251)	(18)	(251)
Derivative Asset (Liability)
Beginning balance	12	(189)	100	9
Unrealized (loss) gain, net recognized in other non-interest income	(30)		(118)	(260)
Transfers to Level 2				0
Ending balance	(18)	(251)	(18)	(251)
Trading Security
Changes in Level 3 assets that were measured at fair value on a recurring basis
Balance at the beginning of the period	12,837	14,479	13,229	14,189
Unrealized (loss) gain, net recognized in other non-interest income	(76)	(180)	(155)	405
Paydown of trading security	(158)	(150)	(471)	(445)
Balance at the end of the period	12,603	14,149	12,603	14,149
Unrealized gains (losses) relating to instruments still held at the end of the period	1,763	2,610	1,763	2,610
Securities Available for Sale
Changes in Level 3 assets that were measured at fair value on a recurring basis
Balance at the beginning of the period	0	0	0	708
Transfers to Level 2				(708)
Balance at the end of the period	0	0	0	0
Unrealized gains (losses) relating to instruments still held at the end of the period	0	0	0	0
Capitalized servicing rights
Changes in Level 3 assets that were measured at fair value on a recurring basis
Balance at the beginning of the period	1,568	0	798	0
Unrealized (loss) gain, net recognized in other non-interest income	(132)		(202)
Additions to servicing rights	1,271		2,111
Balance at the end of the period	2,707	0	2,707	0
Unrealized gains (losses) relating to instruments still held at the end of the period	$ 0	$ 0	$ 0	$ 0

FAIR VALUE MEASUREMENTS - Unobs

FAIR VALUE MEASUREMENTS - Unobservable Inputs Recurring (Details) - Level 3 - Recurring - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Quantitative information about the significant unobservable inputs within Level 3
Total	$ 21,747,000	$ 18,865,000
Trading Security
Quantitative information about the significant unobservable inputs within Level 3
Assets measured on recurring basis	$ 12,603,000	$ 13,229,000
Trading Security | Discounted Cash Flow
Quantitative information about the significant unobservable inputs within Level 3
Discount Rate (as percent)	2.59%	2.62%
Commitments to Lend
Quantitative information about the significant unobservable inputs within Level 3
Assets measured on recurring basis	$ 6,455,000	$ 4,738,000
Commitments to Lend | Historical Trend
Quantitative information about the significant unobservable inputs within Level 3
Closing Ratio (as percent)	80.50%	80.36%
Commitments to Lend | Pricing Model
Quantitative information about the significant unobservable inputs within Level 3
Origination Costs, per loan	$ 3,692	$ 3,692
Forward Commitments
Quantitative information about the significant unobservable inputs within Level 3
Assets measured on recurring basis		$ 100,000
Liabilities measured on recurring basis	$ (18,000)
Forward Commitments | Historical Trend
Quantitative information about the significant unobservable inputs within Level 3
Closing Ratio (as percent)	80.50%	80.36%
Forward Commitments | Pricing Model
Quantitative information about the significant unobservable inputs within Level 3
Origination Costs, per loan	$ 3,692	$ 3,692
Capitalized servicing rights
Quantitative information about the significant unobservable inputs within Level 3
Assets measured on recurring basis	$ 2,707,000	$ 798,000
Capitalized servicing rights | Discounted Cash Flow
Quantitative information about the significant unobservable inputs within Level 3
Discount Rate (as percent)	10.95%	11.00%
Constant prepayment rate (CPR) (as percent)	10.20%	10.40%

FAIR VALUE MEASUREMENTS - Mea78

FAIR VALUE MEASUREMENTS - Measured on Non-recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Quantitative information about the significant unobservable inputs within Level 3
Other real estate owned	$ 288	$ 151
Non-recurring | Level 3
Quantitative information about the significant unobservable inputs within Level 3
Impaired loans	28,082	17,761
Capitalized servicing rights	12,663	10,726
Other real estate owned	288	151
Total	$ 41,033	$ 28,638

FAIR VALUE MEASUREMENTS - Uno79

FAIR VALUE MEASUREMENTS - Unobservable Inputs Non-recurring (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Quantitative information about the significant unobservable inputs within Level 3
Other real estate owned	$ 288	$ 151
Non-recurring | Level 3
Quantitative information about the significant unobservable inputs within Level 3
Impaired loans	28,082	17,761
Capitalized servicing rights	12,663	10,726
Other real estate owned	288	151
Total	41,033	28,638
Non-recurring | Impaired loans | Appraised value of collateral | Level 3
Quantitative information about the significant unobservable inputs within Level 3
Impaired loans	$ 28,082	$ 17,761
Non-recurring | Impaired loans | Minimum | Appraised value of collateral | Level 3
Quantitative information about the significant unobservable inputs within Level 3
Loss severity (as percent)	0.13%	0.00%
Appraised value	$ 16	$ 0
Non-recurring | Impaired loans | Maximum | Appraised value of collateral | Level 3
Quantitative information about the significant unobservable inputs within Level 3
Loss severity (as percent)	39.05%	88.70%
Appraised value	$ 5,987	$ 2,192
Non-recurring | Impaired loans | Weighted Average | Appraised value of collateral | Level 3
Quantitative information about the significant unobservable inputs within Level 3
Loss severity (as percent)	3.70%	9.73%
Appraised value	$ 2,062	$ 1,026
Non-recurring | Capitalized servicing rights | Discounted Cash Flow | Level 3
Quantitative information about the significant unobservable inputs within Level 3
Capitalized servicing rights	$ 12,663	$ 10,726
Non-recurring | Capitalized servicing rights | Minimum | Discounted Cash Flow | Level 3
Quantitative information about the significant unobservable inputs within Level 3
Constant prepayment rate (CPR) (as percent)	7.78%	7.35%
Discount Rate (as percent)	10.00%	10.00%
Non-recurring | Capitalized servicing rights | Maximum | Discounted Cash Flow | Level 3
Quantitative information about the significant unobservable inputs within Level 3
Constant prepayment rate (CPR) (as percent)	13.69%	14.28%
Discount Rate (as percent)	12.76%	14.00%
Non-recurring | Capitalized servicing rights | Weighted Average | Discounted Cash Flow | Level 3
Quantitative information about the significant unobservable inputs within Level 3
Constant prepayment rate (CPR) (as percent)	10.57%	10.44%
Discount Rate (as percent)	11.55%	11.77%
Non-recurring | Other real estate owned | Appraised value of collateral | Level 3
Quantitative information about the significant unobservable inputs within Level 3
Other real estate owned	$ 288	$ 151
Non-recurring | Other real estate owned | Minimum | Appraised value of collateral | Level 3
Quantitative information about the significant unobservable inputs within Level 3
Appraised value	94	101
Non-recurring | Other real estate owned | Maximum | Appraised value of collateral | Level 3
Quantitative information about the significant unobservable inputs within Level 3
Appraised value	215	129
Non-recurring | Other real estate owned | Weighted Average | Appraised value of collateral | Level 3
Quantitative information about the significant unobservable inputs within Level 3
Appraised value	$ 226	$ 122

FAIR VALUE MEASUREMENTS - Fair

FAIR VALUE MEASUREMENTS - Fair Values and Carrying Amounts (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financial Assets
Trading security, at fair value	$ 12,603	$ 13,229
Securities available for sale	1,341,013	1,209,537
Securities held to maturity	402,799	337,680
FHLB bank stock and restricted securities	75,117	71,112
Level 1
Financial Assets
Cash and cash equivalents	92,046	113,075
Trading security, at fair value	0	0
Securities available for sale	45,055	62,284
Securities held to maturity	0	0
FHLB bank stock and restricted securities	0	0
Net loans	0	0
Loans held for sale	0	0
Accrued interest receivable	0	0
Cash surrender value of bank-owned life insurance policies	0	0
Derivative assets	518	622
Assets held for sale	0	0
Financial Liabilities
Total deposits	0	0
Short-term debt	0	0
Long-term Federal Home Loan Bank advances	0	0
Subordinated borrowings	0	0
Derivative liabilities	0	0
Level 2
Financial Assets
Cash and cash equivalents	0	0
Trading security, at fair value	0	0
Securities available for sale	1,295,958	1,147,253
Securities held to maturity	368,063	300,806
FHLB bank stock and restricted securities	75,117	71,112
Net loans	0	0
Loans held for sale	143,745	120,673
Accrued interest receivable	29,133	26,113
Cash surrender value of bank-owned life insurance policies	161,290	139,257
Derivative assets	15,379	16,157
Assets held for sale	322	322
Financial Liabilities
Total deposits	6,785,879	6,624,108
Short-term debt	1,061,232	1,081,996
Long-term Federal Home Loan Bank advances	337,653	143,151
Subordinated borrowings	98,394	96,973
Derivative liabilities	17,198	24,420
Level 3
Financial Assets
Cash and cash equivalents	0	0
Trading security, at fair value	12,603	13,229
Securities available for sale	0	0
Securities held to maturity	34,736	36,874
FHLB bank stock and restricted securities	0	0
Net loans	6,930,703	6,532,745
Loans held for sale	0	0
Accrued interest receivable	0	0
Cash surrender value of bank-owned life insurance policies	0	0
Derivative assets	6,437	4,838
Assets held for sale	0	0
Financial Liabilities
Total deposits	0	0
Short-term debt	0	0
Long-term Federal Home Loan Bank advances	0	0
Subordinated borrowings	0	0
Derivative liabilities	0	0
Carrying Amount
Financial Assets
Cash and cash equivalents	92,046	113,075
Trading security, at fair value	12,603	13,229
Securities available for sale	1,341,013	1,209,537
Securities held to maturity	395,065	334,368
FHLB bank stock and restricted securities	75,117	71,112
Net loans	6,898,402	6,505,789
Loans held for sale	143,745	120,673
Accrued interest receivable	29,133	26,113
Cash surrender value of bank-owned life insurance policies	161,290	139,257
Derivative assets	22,334	21,617
Assets held for sale	322	322
Financial Liabilities
Total deposits	6,790,146	6,622,092
Short-term debt	1,061,300	1,082,044
Long-term Federal Home Loan Bank advances	338,054	142,792
Subordinated borrowings	89,295	89,161
Derivative liabilities	17,198	24,420
Total Fair Value
Financial Assets
Cash and cash equivalents	92,046	113,075
Trading security, at fair value	12,603	13,229
Securities available for sale	1,341,013	1,209,537
Securities held to maturity	402,799	337,680
FHLB bank stock and restricted securities	75,117	71,112
Net loans	6,930,703	6,532,745
Loans held for sale	143,745	120,673
Accrued interest receivable	29,133	26,113
Cash surrender value of bank-owned life insurance policies	161,290	139,257
Derivative assets	22,334	21,617
Assets held for sale	322	322
Financial Liabilities
Total deposits	6,785,879	6,624,108
Short-term debt	1,061,232	1,081,996
Long-term Federal Home Loan Bank advances	337,653	143,151
Subordinated borrowings	98,394	96,973
Derivative liabilities	$ 17,198	$ 24,420

NET INTEREST INCOME AFTER PRO81

NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Banking and Thrift, Interest [Abstract]
Net interest income	$ 71,998	$ 57,971	$ 208,429	$ 173,109
Provision for loan losses	4,900	4,734	14,884	13,262
Net interest income after provision for loan losses	$ 67,098	$ 53,237	$ 193,545	$ 159,847

SUBSEQUENT EVENTS (Details)

SUBSEQUENT EVENTS (Details) $ / shares in Units, $ in Thousands	Oct. 13, 2017USD ($)banking_office$ / sharesshares	Sep. 30, 2017USD ($)shares	Sep. 30, 2016USD ($)	Sep. 30, 2017USD ($)shares	Sep. 30, 2016USD ($)	Dec. 31, 2016USD ($)shares
Subsequent Event [Line Items]
Assets		$ 9,766,703		$ 9,766,703		$ 9,162,542
Common stock, shares outstanding (in shares) | shares		40,423,777		40,423,777		35,672,817
Acquisition, restructuring, and other expenses		$ 1,420	$ 2,170	$ 16,005	$ 3,828
Commerce Bank
Subsequent Event [Line Items]
Acquisition, restructuring, and other expenses		$ 788		$ 2,400
Subsequent event | Commerce Bank
Subsequent Event [Line Items]
Assets	$ 1,900,000
Loans	1,400,000
Deposits	$ 1,700,000
Subsequent event | Commerce Bank | Common stock for common stock
Subsequent Event [Line Items]
Share exchange ratio (in shares) | shares	0.93
Subsequent event | Commerce Bank | Common stock for Series B preferred stock
Subsequent Event [Line Items]
Share exchange ratio (in shares) | shares	0.465
Subsequent event | Commerce Bank | Preferred stock for common stock
Subsequent Event [Line Items]
Share exchange ratio (in shares) | shares	2
Subsequent event | Commerce Bank | Common stock
Subsequent Event [Line Items]
Shares issued (in shares) | shares	4,842,000
Shares issued	$ 188,600
Share price (in dollars per share) | $ / shares	$ 38.95
Subsequent event | Commerce Bank | Preferred stock
Subsequent Event [Line Items]
Shares issued (in shares) | shares	522,000
Shares issued	$ 40,700
Subsequent event | Commerce Bank
Subsequent Event [Line Items]
Number of branch banking offices | banking_office	16
Common stock, shares outstanding (in shares) | shares	6,328,000