Banner (BANR) 10-Q 6 Nov 17 2017 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information Document - shares	9 Months Ended
	Sep. 30, 2017	Nov. 03, 2017
Entity Information [Line Items]
Entity Registrant Name	Banner Corporation
Document Type	10-Q
Document Period End Date	Sep. 30, 2017
Amendment Flag	false
Entity Central Index Key	946,673
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q3
Voting Common Stock [Member]
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		32,806,473
Nonvoting Common Stock [Member]
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		100,029

CONSOLIDATED STATEMENTS OF FINA

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION - USD ($) $ in Thousands		Sep. 30, 2017	Dec. 31, 2016
ASSETS
Cash and due from banks		$ 192,278	$ 177,083
Interest bearing deposits		49,488	70,636
Total cash and cash equivalents		241,766	247,719
Securities—trading, amortized cost $28,663 and $30,154, respectively		23,466	24,568
Securities—available-for-sale, amortized cost $1,338,863 and $806,336, respectively		1,339,057	800,917
Securities—held-to-maturity, fair value $268,663 and $270,528, respectively		264,752	267,873
Federal Home Loan Bank (FHLB) stock		20,854	12,506
Loans held for sale (includes $64,399 and $9,600, at fair value, respectively)		71,905	246,353
Loans receivable		7,774,449	7,451,148
Allowance for loan losses		89,100	85,997
Net loans		7,685,349	7,365,151
Accrued interest receivable		33,837	30,178
Real estate owned (REO), held for sale, net		1,496	11,081
Property and equipment, net		159,893	166,481
Goodwill		244,583	244,583
Other intangibles, net		25,219	30,162
Bank-owned life insurance (BOLI)		161,648	158,936
Deferred tax assets, net		119,333	127,694
Other assets		49,928	59,466
Total assets		10,443,086	9,793,668
Deposits:
Non-interest-bearing		3,379,841	3,140,451
Interest-bearing transaction and savings accounts		4,058,435	3,935,630
Interest-bearing certificates	[1]	1,100,574	1,045,333
Total deposits		8,538,850	8,121,414
Advances from FHLB at fair value		263,349	54,216
Other borrowings		103,713	105,685
Junior subordinated debentures at fair value (issued in connection with Trust Preferred Securities)		97,280	95,200
Accrued expenses and other liabilities		72,604	71,369
Deferred compensation		40,279	40,074
Total liabilities		9,116,075	8,487,958
COMMITMENTS AND CONTINGENCIES (Note 12)
SHAREHOLDERS’ EQUITY
Preferred stock - $0.01 par value per share, 500,000 shares authorized; no shares outstanding at September 30, 2017 and December 31, 2016		0	0
Retained earnings		111,405	95,328
Carrying value of shares held in trust for stock related compensation plans		7,283	7,283
Liability for common stock issued to deferred, stock related, compensation plans		7,283	7,283
Accumulated other comprehensive income (loss)		124	(3,455)
Total shareholders' equity		1,327,011	1,305,710
Total liabilities & shareholders' equity		10,443,086	9,793,668
Voting Common Stock [Member]
SHAREHOLDERS’ EQUITY
Common stock and paid in capital		1,214,547	1,213,225
Nonvoting Common Stock [Member]
SHAREHOLDERS’ EQUITY
Common stock and paid in capital		$ 935	$ 612
[1]	Certificates of deposit include $30,000 and $426,000 of acquisition premiums at September 30, 2017 and December 31, 2016, respectively.

CONSOLIDATED STATEMENTS OF FIN3

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
ASSETS
Securities—trading, amortized cost basis	$ 28,663	$ 30,154
Securities—available-for-sale, amortized cost basis	1,338,863	806,336
Securities—held-to-maturity, fair value	$ 268,663	$ 270,528
SHAREHOLDERS’ EQUITY
Preferred stock, share par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	500,000	500,000
Preferred stock, shares outstanding	0	0
Voting Common Stock [Member]
SHAREHOLDERS’ EQUITY
Common stock, share par value	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	33,154,755	33,108,599
Common stock, shares outstanding	33,154,755	33,108,599
Nonvoting Common Stock [Member]
SHAREHOLDERS’ EQUITY
Common stock, share par value	$ 0.01	$ 0.01
Common stock, shares authorized	5,000,000	5,000,000
Common stock, shares issued	100,029	84,788
Common stock, shares outstanding	100,029	84,788
Loans [Member] | Recurring [Member]
ASSETS
Loans Held-for-sale, Fair Value Disclosure	$ 64,399	$ 9,600

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
INTEREST INCOME:
Loans receivable	$ 95,221	$ 89,805	$ 281,304	$ 265,697
Mortgage-backed securities	6,644	4,803	17,529	15,467
Securities and cash equivalents	3,413	3,241	9,976	9,306
Total interest income	105,278	97,849	308,809	290,470
INTEREST EXPENSE:
Deposits	3,189	2,784	9,162	8,501
FHLB advances	569	256	1,142	874
Other borrowings	84	82	241	234
Junior subordinated debentures	1,226	1,019	3,494	2,962
Total interest expense	5,068	4,141	14,039	12,571
Net interest income	100,210	93,708	294,770	277,899
PROVISION FOR LOAN LOSSES	2,000	2,000	6,000	4,000
Net interest income after provision for loan losses	98,210	91,708	288,770	273,899
NON-INTEREST INCOME:
Deposit fees and other service charges	13,316	12,927	38,739	36,957
Mortgage banking operations	4,498	8,141	15,854	20,409
Bank-owned life insurance (BOLI)	1,043	1,333	3,599	3,646
Miscellaneous	1,705	1,344	7,062	3,936
Other operating income	20,562	23,745	65,254	64,948
Net gain on sale of securities	270	891	230	531
Net change in valuation of financial instruments carried at fair value	(493)	(1,124)	(1,831)	(1,472)
Total non-interest income	20,339	23,512	63,653	64,007
NON-INTEREST EXPENSE:
Salary and employee benefits	48,931	44,758	144,014	136,497
Less capitalized loan origination costs	(4,331)	(4,953)	(13,245)	(14,110)
Occupancy and equipment	11,737	10,979	35,778	32,419
Information/computer data services	4,420	4,836	12,513	14,607
Payment and card processing expenses	5,839	5,878	16,651	16,164
Professional services	3,349	2,258	12,233	5,736
Advertising and marketing	2,130	2,282	5,225	6,489
Deposit insurance	1,101	890	3,438	3,539
State/municipal business and use taxes	780	956	1,857	2,564
REO operations	240	(21)	(1,089)	513
Amortization of core deposit intangibles	1,542	1,724	4,790	5,339
Miscellaneous	6,851	7,785	20,432	22,311
Operating expenses, before acquisition-related costs	82,589	77,372	242,597	232,068
Acquisition-related costs	0	1,720	0	10,945
Total non-interest expense	82,589	79,092	242,597	243,013
Income before provision for income taxes	35,960	36,128	109,826	94,893
PROVISION FOR INCOME TAXES	10,883	12,277	35,502	32,312
NET INCOME	$ 25,077	$ 23,851	$ 74,324	$ 62,581
Earnings per common share:
Basic	$ 0.76	$ 0.70	$ 2.25	$ 1.84
Diluted	0.76	0.70	2.25	1.83
Cumulative dividends declared per common share	$ 0.25	$ 0.23	$ 1.75	$ 0.65
Weighted average number of common shares outstanding, Basic	32,982,532	34,045,225	32,966,214	34,050,459
Weighted average number of common shares outstanding, Diluted	33,079,099	34,124,611	33,061,172	34,104,875

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	$ 25,077	$ 23,851	$ 74,324	$ 62,581
OTHER COMPREHENSIVE INCOME (LOSS), NET OF INCOME TAXES:
Unrealized holding gain (loss) on available-for-sale securities arising during the period	493	(4,659)	5,841	14,043
Income tax (expense) benefit related to available-for-sale securities unrealized holding gain (loss)	(202)	1,677	(2,116)	(5,060)
Reclassification for net gains on available-for-sale securities realized in earnings	(270)	(735)	(230)	(376)
Income tax expense related to available-for-sale securities realized gains	97	265	84	136
Other comprehensive income (loss)	118	(3,452)	3,579	8,743
COMPREHENSIVE INCOME	$ 25,195	$ 20,399	$ 77,903	$ 71,324

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock [Member]	Common Stock and Paid in Capital [Member]	Retained Earnings (Accumulated Deficit) [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance, beginning of the period (in shares) at Dec. 31, 2015		34,242,255
Balance, beginning of the period at Dec. 31, 2015	$ 1,300,059		$ 1,261,174	$ 39,615	$ (730)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	85,385			85,385
Other comprehensive income, net of income tax	(2,725)				(2,725)
Accrual of dividends on common stock	(29,672)			(29,672)
Proceeds from issuance of common stock for stockholder reinvestment program (in shares)		96,382
Repurchase of common stock under the terms of the repurchase plan (in shares)		(1,145,250)
Stock Repurchased and Retired During Period, Value	(50,772)		(50,772)
Amortization of stock-based compensation related to restricted stock grants, net of shares surrendered	3,401		3,401
Excess tax benefit on stock-based compensation	34		34
Balance, end of the period (in shares) at Dec. 31, 2016		33,193,387
Balance, end of the period at Dec. 31, 2016	1,305,710		1,213,837	95,328	(3,455)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	74,324			74,324
Other comprehensive income, net of income tax	3,579				3,579
Accrual of dividends on common stock	(58,247)			(58,247)
Proceeds from issuance of common stock for stockholder reinvestment program (in shares)		86,397
Repurchase of common stock under the terms of the repurchase plan (in shares)		(25,000)
Stock Repurchased and Retired During Period, Value	(1,400)		(1,400)
Amortization of stock-based compensation related to restricted stock grants, net of shares surrendered	3,045		3,045
Balance, end of the period (in shares) at Sep. 30, 2017		33,254,784
Balance, end of the period at Sep. 30, 2017	$ 1,327,011		$ 1,215,482	$ 111,405	$ 124

CONSOLIDATED STATEMENTS OF CHA7

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Statement of Stockholders' Equity [Abstract]
Cumulative dividends declared per common share	$ 0.25	$ 0.23	$ 1.75	$ 0.65	$ 0.88

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
OPERATING ACTIVITIES:
Net income	$ 74,324	$ 62,581
Adjustments to reconcile net income to net cash provided from operating activities:
Depreciation	10,153	9,219
Deferred income and expense, net of amortization	(1,513)	419
Amortization of core deposit intangibles	4,790	5,339
Gain on sale of securities	(230)	(531)
Net change in valuation of financial instruments carried at fair value	1,831	1,472
Purchases of securities—trading	0	(1,725)
Proceeds from sales of securities—trading	0	1,682
Principal repayments and maturities of securities—trading	1,618	3,527
Decrease in deferred taxes	(8,361)	(10,747)
Increase in current taxes payable	2,853	2,108
Equity-based compensation	3,045	3,129
Increase in cash surrender value of BOLI	(3,046)	(3,628)
Gain on sale of loans, net of capitalized servicing rights	(11,653)	(14,583)
Gain on disposal of real estate held for sale and property and equipment	(2,438)	(748)
Provision for loan losses	6,000	4,000
Provision for losses on real estate held for sale	256	804
Origination of loans held for sale	(626,677)	(753,714)
Proceeds from sales of loans held for sale	812,778	691,355
Net change in:
Other assets	(4,082)	(20,428)
Other liabilities	(144)	13,560
Net cash provided from operating activities	276,226	14,585
INVESTING ACTIVITIES:
Purchases of securities—available-for-sale	(706,911)	(242,222)
Principal repayments and maturities of securities—available-for-sale	135,163	143,244
Proceeds from sales of securities—available-for-sale	35,559	233,252
Purchases of securities—held-to-maturity	(5,105)	(60,344)
Principal repayments and maturities of securities—held-to-maturity	6,544	7,458
Loan originations, net of principal repayments	(120,116)	(34,328)
Purchases of loans and participating interest in loans	(266,481)	(230,778)
Proceeds from sales of other loans	73,366	193,939
Purchases of property and equipment	(7,641)	(9,223)
Proceeds from sale of real estate held for sale and sale of other property, net	15,873	8,021
Proceeds from FHLB stock repurchase program	80,056	70,237
Purchase of FHLB stock	(88,404)	(67,006)
Other	327	1,922
Net cash (used in) provided from investing activities	(847,770)	14,172
FINANCING ACTIVITIES:
Increase in deposits, net	417,436	56,904
Proceeds from long-term Federal Home Loan Bank Advances	150,000	0
Repayments of long-term Federal Home Loan Bank Advances	(7)	(70,007)
Proceeds from (repayments of) overnight and short term FHLB advances, net	59,000	(600)
(Decrease) increase in other borrowings, net	(1,971)	10,586
Cash dividends paid	(57,467)	(20,542)
Payments for Repurchase of Common Stock	1,400	21,098
Net cash provided from (used in) financing activities	565,591	(44,757)
NET CHANGE IN CASH AND CASH EQUIVALENTS	(5,953)	(16,000)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	247,719	261,917
CASH AND CASH EQUIVALENTS, END OF PERIOD	241,766	245,917
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Interest paid in cash	13,406	12,781
Taxes paid, net of refunds received in cash	25,599	23,751
NON-CASH INVESTING AND FINANCING TRANSACTIONS:
Loans, net of discounts, specific loss allowances and unearned income, transferred to real estate owned and other repossessed assets	10	758
Dividends Payable	$ 8,443	$ 7,873

BASIS OF PRESENTATION AND SIGNI

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES	9 Months Ended
	Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES	BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES The accompanying unaudited condensed consolidated financial statements include the accounts of Banner Corporation (the Company or Banner), a bank holding company incorporated in the State of Washington and its wholly-owned subsidiaries, Banner Bank and Islanders Bank (the Banks). These unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (GAAP) for interim financial information and in accordance with the instructions to Form 10-Q and Article 10 of Regulation S-X as promulgated by the Securities and Exchange Commission (SEC). In preparing these financial statements, the Company has evaluated events and transactions subsequent to September 30, 2017 for potential recognition or disclosure. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation of the financial position and results of operations for the periods presented have been included. Certain information and disclosures normally included in annual financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to the rules and regulations of the SEC and the accounting standards for interim financial statements. Certain reclassifications have been made to the 2016 Consolidated Financial Statements and/or schedules to conform to the 2017 presentation. These reclassifications may have affected certain ratios for the prior periods. The effect of these reclassifications is considered immaterial. All significant intercompany transactions and balances have been eliminated. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect amounts reported in the financial statements. Various elements of the Company’s accounting policies, by their nature, are inherently subject to estimation techniques, valuation assumptions and other subjective assessments. In particular, management has identified several accounting policies that, due to the judgments, estimates and assumptions inherent in those policies, are significant to an understanding of Banner’s financial statements. These policies relate to (i) the methodology for the recognition of interest income, (ii) determination of the provision and allowance for loan losses, (iii) the valuation of financial assets and liabilities recorded at fair value, including other-than-temporary impairment (OTTI) losses, (iv) the valuation of intangibles, such as goodwill, core deposit intangibles (CDI) and mortgage servicing rights, (v) the valuation of real estate held for sale, (vi) the valuation of assets and liabilities acquired in business combinations and subsequent recognition of related income and expense, and (vii) the valuation or recognition of deferred tax assets and liabilities. These policies and judgments, estimates and assumptions are described in greater detail in subsequent notes to the Consolidated Financial Statements and Management’s Discussion and Analysis of Financial Condition and Results of Operations (Critical Accounting Policies) in our Annual Report on Form 10-K for the year ended December 31, 2016 filed with the SEC. There have been no significant changes in our application of accounting policies during the first nine months of 2017 . The information included in this Form 10-Q should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2016 as filed with the SEC ( 2016 Form 10-K). Interim results are not necessarily indicative of results for a full year or any other interim period.

ACCOUNTING STANDARDS RECENTLY I

ACCOUNTING STANDARDS RECENTLY ISSUED OR ADOPTED	9 Months Ended
	Sep. 30, 2017
Accounting Changes and Error Corrections [Abstract]
ACCOUNTING STANDARDS RECENTLY ISSUED OR ADOPTED	ACCOUNTING STANDARDS RECENTLY ISSUED OR ADOPTED Revenue from Contracts with Customers In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2014-09, Revenue from Contracts with Customers , which creates Topic 606 and supersedes Topic 605, Revenue Recognition . The core principle of Topic 606 is that an entity recognizes revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In general, the new guidance requires companies to use more judgment and make more estimates than under current guidance, including identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. Under the terms of ASU 2015-14 the standard is effective for interim and annual periods beginning after December 15, 2017. For financial reporting purposes, the standard allows for either full retrospective adoption, meaning the standard is applied to all of the periods presented, or modified retrospective adoption, meaning the standard is applied only to the most current period presented in the financial statements with the cumulative effect of initially applying the standard recognized at the date of initial application. Management intends to adopt the new guidance on January 1, 2018. Management has completed its identification of all revenue streams included in the financial statements (excluding interest income, which is outside of the scope of the pronouncement) and identified which revenue streams are within the scope of the pronouncement. Management is finalizing its evaluation on whether the implementation of this ASU will result in any accounting changes for the revenue streams within the scope of this ASU. Management does not expect the adoption of this ASU to have a material impact on the Company’s Consolidated Financial Statements other than additional disclosure requirements. In April 2016, FASB issued ASU No. 2016-10, Identifying Performance Obligations and Licensing . The amendments in this ASU do not change the core principle of the guidance in Topic 606. Rather, the amendments in this ASU clarify the following two aspects of Topic 606: identifying performance obligations and the licensing implementation guidance, while retaining the related principles for those areas. The amendments in this ASU affect the guidance in ASU 2014-09, discussed above, which is not yet effective. The effective date and transition requirements for the amendments in this ASU are the same as the effective date and transition requirements in Topic 606 ( Revenues from Contracts with Customers ). The Company is evaluating the provisions of this ASU in conjunction with ASU No. 2014-09 to determine the potential impact Topic 606 and its amendments will have on the Company’s Consolidated Financial Statements. In May 2016, FASB issued ASU No. 2016-12, Narrow-Scope Improvements and Practical Expedients , amending ASC Topic 606 ( Revenue from Contracts with Customers ). The amendments in this ASU do not change the core principle of the guidance in Topic 606. Rather, the amendments in this ASU affect only several narrow aspects of Topic 606. The amendments in this ASU affect the guidance in ASU 2014-09, discussed above, which is not yet effective. The effective date and transition requirements for the amendments in this ASU are the same as the effective date and transition requirements in Topic 606. The Company is evaluating the provisions of this ASU in conjunction with ASU No. 2014-09 to determine the potential impact Topic 606 and its amendments will have on the Company’s Consolidated Financial Statements. Recognition and Measurement of Financial Assets and Financial Liabilities In January 2016, FASB issued ASU No. 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities . The amendments in this ASU require equity securities to be measured at fair value with changes in the fair value recognized through net income. The amendments allow equity investments that do not have readily determinable fair values to be remeasured at fair value under certain circumstances and require enhanced disclosures about those investments. This ASU simplifies the impairment assessment of equity investments without readily determinable fair values. This ASU also eliminates the requirement to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet. The amendments in this ASU require separate presentation in other comprehensive income of the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments. This ASU excludes from net income gains or losses that the entity may not realize because those financial liabilities are not usually transferred or settled at their fair values before maturity. The amendments in this ASU require separate presentation of financial assets and financial liabilities by measurement category and form of financial asset (that is, securities or loans and receivables) on the balance sheet or in the accompanying notes to the financial statements. The amendments in this ASU are effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. At September 30, 2017 , Banner held $5.6 million of available-for-sale equity investment securities. The provisions of ASU No. 2016-01 require changes in the value of equity securities to be recognized in the income statement which could result in additional volatility in income. Leases (Topic 842) In February 2016, FASB issued ASU No. 2016-02, Leases (Topic 842) . The amendments in this ASU require lessees to recognize the following for all leases (with the exception of short-term) at the commencement date; a lease liability, which is a lessee‘s obligation to make lease payments arising from a lease, measured on a discounted basis; and a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. The amendments in this ASU leave lessor accounting largely unchanged, although certain targeted improvements were made to align lessor accounting with the lessee accounting model. This ASU simplifies the accounting for sale and leaseback transactions primarily because lessees must recognize lease assets and lease liabilities. Lessees will no longer be provided with a source of off-balance sheet financing. The amendments in this ASU are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early application is permitted upon issuance. Lessees (for capital and operating leases) and lessors (for sales-type, direct financing, and operating leases) must apply a modified retrospective transition approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. The modified retrospective approach would not require any transition accounting for leases that expired before the earliest comparative period presented. Lessees and lessors may not apply a full retrospective transition approach. 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 and regulatory capital ratios. The Company leases 115 buildings and offices under non-cancelable operating leases, the majority of which will be subject to this ASU. While the Company has not quantified the impact to its balance sheet, upon the adoption of this ASU the Company expects to report increased assets and increased liabilities on its Consolidated Statements of Financial Condition as a result of recognizing right-of-use assets and lease liabilities related to these leases and certain equipment under non-cancelable operating lease agreements, which currently are not reflected in its Consolidated Statements of Financial Condition. Derivatives and Hedging (Topic 815) In March 2016, FASB issued ASU No. 2016-05, Effect of Derivative Contract Novations on Existing Hedge Accounting Relationships . The amendments in this ASU clarify that a change in the counterparty to a derivative instrument that has been designated as the hedging instrument under Topic 815 ( Derivatives and Hedging ) does not, in and of itself, require dedesignation of that hedging relationship provided that all other hedge accounting criteria continue to be met. The amendments in this ASU were effective for financial statements issued for fiscal years beginning after December 15, 2016, and interim periods within those fiscal years. An entity has an option to apply the amendments in this ASU on either a prospective basis or a modified retrospective basis. Early adoption is permitted, including adoption in an interim period. At September 30, 2017 , Banner had three swap relationships using hedge accounting with a total market value of $531,000. This ASU has not had a material impact on the Company’s Consolidated Financial Statements. In March 2016, FASB issued ASU No. 2016-06, Contingent Put and Call Options in Debt Instruments . The amendments in this ASU clarify the requirements for assessing whether contingent call (put) options that can accelerate the payment of principal on debt instruments are clearly and closely related to their debt hosts. To determine how to account for debt instruments with embedded features, including contingent put and call options, an entity is required to assess whether the embedded derivatives must be bifurcated from the host contract and accounted for separately. Part of this assessment consists of evaluating whether the embedded derivative features are clearly and closely related to the debt host. Under existing guidance, for contingently exercisable options to be considered clearly and closely related to a debt host, they must be indexed only to interest rates or credit risk. ASU 2016-06 addresses inconsistent interpretations of whether an event that triggers an entity’s ability to exercise the embedded contingent option must be indexed to interest rates or credit risk for that option to qualify as clearly and closely related. Diversity in practice has developed because the existing four-step decision sequence in ASC 815 focuses only on whether the payoff was indexed to something other than an interest rate or credit risk. As a result, entities have been uncertain whether they should (1) determine whether the embedded features are clearly and closely related to the debt host solely on the basis of the four-step decision sequence or (2) first apply the four-step decision sequence and then also evaluate whether the event triggering the exercisability of the contingent put or call option is indexed only to an interest rate or credit risk. This ASU clarifies that in assessing whether an embedded contingent put or call option is clearly and closely related to the debt host, an entity is required to perform only the four-step decision sequence in ASC 815 as amended by this ASU. The entity does not have to separately assess whether the event that triggers its ability to exercise the contingent option is itself indexed only to interest rates or credit risk. The amendments in this ASU are effective for financial statements issued for fiscal years beginning after December 15, 2016, and interim periods within those fiscal years. This ASU has not had a material impact on the Company’s Consolidated Financial Statements. In August 2017, FASB issued ASU No. 2017-12, Targeted Improvements to Accounting for Hedging Activities . The amendments in this ASU are intended to provide investors better insight to an entity's risk management hedging strategies by permitting a company to recognize the economic results of its hedging strategies in its financial statements. The amendments in this ASU permit hedge accounting for hedging relationships involving nonfinancial risk and interest rate risk by removing certain limitations in cash flow and fair value hedging relationships. In addition, the ASU requires an entity to present the earnings effect of the hedging instrument in the same income statement line item in which the earnings effect of the hedged item is reported. This ASU is effective for fiscal years beginning after December 15, 2018, and early adoption is permitted. Adoption of ASU 2017-12 is not expected to have a material impact on the Company's Consolidated Financial Statements. Financial Instruments—Credit Losses (Topic 326) In June 2016, FASB issued ASU No. 2016-13, Measurement of Credit Losses on Financial Instruments . Current GAAP requires an “incurred loss” methodology for recognizing credit losses that delays recognition until it is probable a loss has been incurred. The main objective of this ASU is to provide financial statement users with more decision-useful information about the expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date. The amendment affects loans, debt securities, trade receivables, net investments in leases, off-balance-sheet credit exposures, reinsurance receivables, and any other financial asset not excluded from the scope that have the contractual right to receive cash. The amendments in this ASU replace the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. The amendments in this ASU require a financial asset (or group of financial assets) measured at amortized cost basis to be presented at the net amount expected to be collected. The allowance for credit losses is a valuation account that is deducted from the amortized cost basis of the financial asset(s) to present the net carrying value at the amount expected to be collected on the financial asset. The measurement of expected credit losses will be based on relevant information about past events, including historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. The amendments in this ASU broaden the information that an entity must consider in developing its expected credit loss estimate for assets measured either collectively or individually. The use of forecasted information incorporates more timely information in the estimate of expected credit loss, which will be more decision useful to users of the financial statements. The amendments in this ASU will be effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company is still evaluating the effects this ASU will have on the Company’s Consolidated Financial Statements. The Company has formed an internal committee to oversee the project and has engaged a third-party vendor to assist with the project. Upon adoption, the Company expects a change in the processes and procedures to calculate the allowance for loan losses, including changes in assumptions and estimates to consider expected credit losses over the life of the loan versus the current accounting practice that utilizes the incurred loss model. The new guidance may result in an increase in the allowance for loan losses which will also reflect the new requirement to include the nonaccretable principal differences on purchased credit-impaired loans; however, the Company is still in the process of determining the magnitude of the change and its impact on the Consolidated Financial Statements. In addition, the current accounting policy and procedures for other-than-temporary impairment on investment securities available-for-sale will be replaced with an allowance approach. The Company has begun developing and implementing processes to address the amendments of this ASU. Receivables—Nonrefundable Fees and Other Costs (Subtopic 310-20) In March 2017, FASB issued ASU No. 2017-08, Premium Amortization on Purchased Callable Debt Securities . The amendments in this ASU shorten the amortization period for certain callable debt securities held at a premium. Specifically, the amendments require the premium to be amortized to the earliest call date. Under current GAAP, premiums and discounts on callable debt securities generally are amortized to the maturity date. The amendments do not require an accounting change for securities held at a discount; the discount continues to be amortized to the maturity date. The amendments in this ASU more closely align the amortization period of premiums and discounts to expectations incorporated in market pricing on the underlying securities. The amendments in this ASU are effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. The Company is still evaluating the effects this ASU will have on the Company’s Consolidated Financial Statements. Compensation—Stock Compensation (Topic 718) In May 2017, FASB issued ASU 2017-09, Scope of Modification Accounting . The amendments in this ASU are intended to provide clarity and reduce both (1) diversity in practice and (2) cost and complexity when applying the guidance in Topic 718, Compensation—Stock Compensation , to a change to the terms or conditions of a share-based payment award. The amendments in this ASU provide guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting in Topic 718. An entity should account for the effects of a modification unless all the following are met: (1) the fair value (or calculated value or intrinsic value, if such an alternative measurement method is used) of the modified award is the same as the fair value (or calculated value or intrinsic value, if such an alternative measurement method is used) of the original award immediately before the original award is modified. If the modification does not affect any of the inputs to the valuation technique that the entity uses to value the award, the entity is not required to estimate the value immediately before and after the modification, (2) the vesting conditions of the modified award are the same as the vesting conditions of the original award immediately before the original award is modified and (3) the classification of the modified award as an equity instrument or a liability instrument is the same as the classification of the original award immediately before the original award is modified. The amendments in this ASU are effective for all entities for annual periods, and interim periods within those annual periods, beginning after December 15, 2017. Early adoption is permitted, including adoption in any interim period, for (1) public business entities for reporting periods for which financial statements have not yet been issued and (2) all other entities for reporting periods for which financial statements have not yet been made available for issuance. The Company's early adoption of the amendments in this ASU in the quarter ended June 30, 2017 did not have a material impact on the Company’s Consolidated Financial Statements.

SECURITIES

SECURITIES	9 Months Ended
	Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract]
INTEREST-BEARING DEPOSITS AND SECURITIES	SECURITIES The amortized cost, gross unrealized gains and losses and estimated fair value of securities at September 30, 2017 and December 31, 2016 are summarized as follows (in thousands): September 30, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Trading: U.S. Government and agency obligations $ 1,230 $ 1,305 Municipal bonds 330 331 Corporate bonds 27,089 21,675 Equity securities 14 155 $ 28,663 $ 23,466 Available-for-Sale: U.S. Government and agency obligations $ 87,509 $ 379 $ (303 ) $ 87,585 Municipal bonds 113,794 1,194 (342 ) 114,646 Corporate bonds 10,567 79 (44 ) 10,602 Mortgage-backed or related securities 1,093,203 4,103 (4,874 ) 1,092,432 Asset-backed securities 28,104 157 (54 ) 28,207 Equity securities 5,686 10 (111 ) 5,585 $ 1,338,863 $ 5,922 $ (5,728 ) $ 1,339,057 Held-to-Maturity: U.S. Government and agency obligations $ 1,035 $ 24 $ — $ 1,059 Municipal bonds: 193,987 4,638 (1,015 ) 197,610 Corporate bonds 4,265 — — 4,265 Mortgage-backed or related securities 65,465 476 (212 ) 65,729 $ 264,752 $ 5,138 $ (1,227 ) $ 268,663 December 31, 2016 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Trading: U.S. Government and agency obligations $ 1,230 $ 1,326 Municipal bonds 331 335 Corporate bonds 26,959 21,143 Mortgage-backed or related securities 1,620 1,641 Equity securities 14 123 $ 30,154 $ 24,568 Available-for-Sale: U.S. Government and agency obligations $ 57,288 $ 146 $ (456 ) $ 56,978 Municipal bonds 110,487 455 (1,089 ) 109,853 Corporate bonds 10,255 77 (49 ) 10,283 Mortgage-backed or related securities 598,899 2,064 (6,251 ) 594,712 Asset-backed securities 29,319 — (326 ) 28,993 Equity securities 88 10 — 98 $ 806,336 $ 2,752 $ (8,171 ) $ 800,917 Held-to-Maturity: U.S. Government and agency obligations $ 1,065 $ — $ (18 ) $ 1,047 Municipal bonds: 196,989 4,173 (1,272 ) 199,890 Corporate bonds 3,876 — — 3,876 Mortgage-backed or related securities 65,943 309 (537 ) 65,715 $ 267,873 $ 4,482 $ (1,827 ) $ 270,528 At September 30, 2017 and December 31, 2016 , the gross unrealized losses and the fair value for securities available-for-sale and held-to-maturity aggregated by the length of time that individual securities have been in a continuous unrealized loss position was as follows (in thousands): September 30, 2017 Less Than 12 Months 12 Months or More Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Available-for-Sale: U.S. Government and agency obligations $ 39,846 $ (286 ) $ 5,680 $ (17 ) $ 45,526 $ (303 ) Municipal bonds 32,559 (169 ) 13,023 (173 ) 45,582 (342 ) Corporate bonds 300 (1 ) 4,814 (43 ) 5,114 (44 ) Mortgage-backed or related securities 437,934 (3,417 ) 95,051 (1,457 ) 532,985 (4,874 ) Asset-backed securities 9,968 (54 ) — — 9,968 (54 ) Equity securities 5,487 (111 ) — — 5,487 (111 ) $ 526,094 $ (4,038 ) $ 118,568 $ (1,690 ) $ 644,662 $ (5,728 ) Held-to-Maturity Municipal bonds $ 40,230 $ (903 ) $ 4,347 $ (112 ) $ 44,577 $ (1,015 ) Mortgage-backed or related securities 18,889 (212 ) — — 18,889 (212 ) $ 59,119 $ (1,115 ) $ 4,347 $ (112 ) $ 63,466 $ (1,227 ) December 31, 2016 Less Than 12 Months 12 Months or More Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Available-for-Sale: U.S. Government and agency obligations $ 39,043 $ (442 ) $ 1,012 $ (14 ) $ 40,055 $ (456 ) Municipal bonds 60,765 (1,087 ) 556 (2 ) 61,321 (1,089 ) Corporate bonds 5,206 (49 ) — — 5,206 (49 ) Mortgage-backed or related securities 403,431 (5,604 ) 47,467 (647 ) 450,898 (6,251 ) Asset-backed securities 9,928 (101 ) 19,064 (225 ) 28,992 (326 ) $ 518,373 $ (7,283 ) $ 68,099 $ (888 ) $ 586,472 $ (8,171 ) Held-to-Maturity U.S. Government and agency obligations $ 1,047 $ (18 ) $ — $ — $ 1,047 $ (18 ) Municipal bonds 64,802 (1,267 ) 204 (5 ) 65,006 (1,272 ) Mortgage-backed or related securities 42,245 (537 ) — — 42,245 (537 ) $ 108,094 $ (1,822 ) $ 204 $ (5 ) $ 108,298 $ (1,827 ) At September 30, 2017 , there were 221 securities—available-for-sale with unrealized losses, compared to 243 at December 31, 2016 . At September 30, 2017 , there were 31 securities—held-to-maturity with unrealized losses, compared to 73 at December 31, 2016 . Management does not believe that any individual unrealized loss as of September 30, 2017 or December 31, 2016 represented other-than-temporary impairment (OTTI). The decline in fair market value of these securities was generally due to changes in interest rates and changes in market-desired spreads subsequent to their purchase. There were no sales of securities—trading during the nine months ended September 30, 2017 compared with sales of $1.7 million with a resulting net gain of $156,000 for the nine months ending September 30, 2016 . The Company did no t recognize any OTTI charges or recoveries on securities—trading during the nine months ended September 30, 2017 or the nine months ended September 30, 2016 . There were no securities—trading in a nonaccrual status at September 30, 2017 or December 31, 2016 . Net unrealized holding gains of $389,000 were recognized during the nine months ended September 30, 2017 . Sales of securities—available-for-sale totaled $35.6 million with a resulting net gain of $230,000 for the nine months ended September 30, 2017 . Sales of securities—available-for-sale totaled $233.3 million with a resulting net gain of $374,000 for the nine months ended September 30, 2016 . There were no securities—available-for-sale in a nonaccrual status at September 30, 2017 or December 31, 2016 . There were no sales of securities—held-to-maturity during the nine months ended September 30, 2017 or September 30, 2016 . There were no securities—held-to-maturity in a nonaccrual status at September 30, 2017 or December 31, 2016 . The amortized cost and estimated fair value of securities at September 30, 2017 , by contractual maturity, are shown below (in thousands). Expected maturities will differ from contractual maturities because some securities may be called or prepaid with or without call or prepayment penalties. September 30, 2017 Trading Available-for-Sale Held-to-Maturity Amortized Cost Fair Value Amortized Cost Fair Value Amortized Cost Fair Value Maturing in one year or less $ 130 $ 131 $ 26,951 $ 26,911 $ 1,226 $ 1,226 Maturing after one year through five years 230 231 110,023 110,293 24,269 24,432 Maturing after five years through ten years 1,200 1,274 265,137 264,366 108,739 110,368 Maturing after ten years through twenty years 17,089 14,248 255,076 256,319 88,407 91,280 Maturing after twenty years 10,000 7,427 675,990 675,583 42,111 41,357 28,649 23,311 1,333,177 1,333,472 264,752 268,663 Equity securities 14 155 5,686 5,585 — — $ 28,663 $ 23,466 $ 1,338,863 $ 1,339,057 $ 264,752 $ 268,663 The following table presents, as of September 30, 2017 , investment securities which were pledged to secure borrowings, public deposits or other obligations as permitted or required by law (in thousands): September 30, 2017 Carrying Value Amortized Cost Fair Value Purpose or beneficiary: State and local governments public deposits $ 127,661 $ 127,549 $ 130,380 Interest rate swap counterparties 16,172 16,197 16,218 Repurchase agreements 127,632 127,803 127,797 Other 3,949 3,948 3,888 Total pledged securities $ 275,414 $ 275,497 $ 278,283

LOANS RECEIVABLE AND THE ALLOWA

LOANS RECEIVABLE AND THE ALLOWANCE FOR LOAN LOSSES	9 Months Ended
	Sep. 30, 2017
Receivables [Abstract]
LOANS RECEIVABLE AND THE ALLOWANCE FOR LOAN LOSSES	LOANS RECEIVABLE AND THE ALLOWANCE FOR LOAN LOSSES Loans receivable at September 30, 2017 and December 31, 2016 are summarized as follows (dollars in thousands): September 30, 2017 December 31, 2016 Amount Percent of Total Amount Percent of Total Commercial real estate: Owner-occupied $ 1,369,130 17.6 % $ 1,352,999 18.1 % Investment properties 1,993,144 25.6 1,986,336 26.7 Multifamily real estate 311,706 4.0 248,150 3.3 Commercial construction 157,041 2.0 124,068 1.7 Multifamily construction 136,532 1.8 124,126 1.7 One- to four-family construction 399,361 5.1 375,704 5.0 Land and land development: Residential 158,384 2.0 170,004 2.3 Commercial 27,095 0.4 29,184 0.4 Commercial business 1,311,409 16.9 1,207,879 16.2 Agricultural business, including secured by farmland 339,932 4.4 369,156 5.0 One- to four-family residential 869,556 11.2 813,077 10.9 Consumer: Consumer secured by one- to four-family 535,300 6.9 493,211 6.6 Consumer—other 165,859 2.1 157,254 2.1 Total loans 7,774,449 100.0 % 7,451,148 100.0 % Less allowance for loan losses (89,100 ) (85,997 ) Net loans $ 7,685,349 $ 7,365,151 Loan amounts included unamortized costs of $389,000 as of September 30, 2017 and were net of unearned fees of $5.8 million as of December 31, 2016 . Net loans include net discounts on acquired loans of $23.4 million and $31.1 million as of September 30, 2017 and December 31, 2016 , respectively. Purchased credit-impaired loans and purchased non-credit-impaired loans. Purchased loans, including loans acquired in business combinations, are recorded at their fair value at the acquisition date. Credit discounts are included in the determination of fair value; therefore, an allowance for loan and lease losses is not recorded at the acquisition date. Acquired loans are evaluated upon acquisition and classified as either purchased credit-impaired (PCI) or purchased non-credit-impaired. PCI loans reflect credit deterioration since origination such that it is probable at acquisition that the Company will be unable to collect all contractually required payments. The outstanding contractual unpaid principal balance of PCI loans, excluding acquisition accounting adjustments, was $34.9 million at September 30, 2017 and $48.4 million at December 31, 2016 . The carrying balance of PCI loans was $23.2 million at September 30, 2017 and $32.3 million at December 31, 2016 . The following table presents the changes in the accretable yield for PCI loans for the three and nine months ended September 30, 2017 and 2016 (in thousands): Three Months Ended Nine Months Ended 2017 2016 2017 2016 Balance, beginning of period $ 7,666 $ 11,035 $ 8,717 $ 10,375 Accretion to interest income (1,720 ) (1,811 ) (5,210 ) (6,349 ) Disposals — (899 ) (497 ) (1,018 ) Reclassifications from non-accretable difference 918 1,120 3,854 6,437 Balance, end of period $ 6,864 $ 9,445 $ 6,864 $ 9,445 As of September 30, 2017 and December 31, 2016 , the non-accretable difference between the contractually required payments and cash flows expected to be collected were $11.7 million and $15.7 million , respectively. Impaired Loans and the Allowance for Loan Losses. A loan is considered impaired when, based on current information and circumstances, the Company determines it is probable that it will be unable to collect all amounts due according to the contractual terms of the loan agreement, including scheduled interest payments. Factors involved in determining impairment include, but are not limited to, the financial condition of the borrower, the value of the underlying collateral and the current status of the economy. Impaired loans are comprised of loans on nonaccrual, troubled debt restructurings (TDRs) that are performing under their restructured terms, and loans that are 90 days or more past due, but are still on accrual. PCI loans are considered performing within the scope of the purchased credit-impaired accounting guidance and are not included in the impaired loan tables. The following tables provide information on impaired loans, excluding PCI loans, with and without allowance reserves at September 30, 2017 and December 31, 2016 . Recorded investment includes the unpaid principal balance or the carrying amount of loans less charge-offs and net deferred loan fees (in thousands): September 30, 2017 Unpaid Principal Balance Recorded Investment Related Allowance Without Allowance (1) With Allowance (2) Commercial real estate: Owner-occupied $ 8,250 $ 7,438 $ 200 $ 19 Investment properties 7,657 4,247 3,208 245 Land and land development: Residential 1,322 798 193 66 Commercial 1,538 928 — — Commercial business 7,945 7,195 573 52 Agricultural business/farmland 8,579 6,956 500 196 One- to four-family residential 8,858 2,878 5,904 184 Consumer: Consumer secured by one- to four-family 1,698 1,492 140 7 Consumer—other 147 71 77 4 $ 45,994 $ 32,003 $ 10,795 $ 773 December 31, 2016 Unpaid Principal Balance Recorded Investment Related Allowance Without Allowance (1) With Allowance (2) Commercial real estate: Owner-occupied $ 3,786 $ 3,373 $ 203 $ 20 Investment properties 9,916 5,565 4,304 408 Multifamily real estate 508 147 349 64 One- to four-family construction 1,180 — 1,180 156 Land and land development: Residential 3,012 750 1,106 219 Commercial 1,608 998 — — Commercial business 3,753 3,074 651 69 Agricultural business/farmland 6,438 6,354 — — One- to four-family residential 11,439 3,149 8,026 479 Consumer: Consumer secured by one- to four-family 1,904 1,721 144 1 Consumer—other 391 226 166 4 $ 43,935 $ 25,357 $ 16,129 $ 1,420 (1) Includes loans without an allowance reserve that have been individually evaluated for impairment and that evaluation concluded that no reserve was needed and $9.3 million and $10.0 million of homogenous and small balance loans as of September 30, 2017 and December 31, 2016 , respectively, that are collectively evaluated for impairment for which a general reserve has been established. (2) Loans with a specific allowance reserve have been individually evaluated for impairment using either a discounted cash flow analysis or, for collateral dependent loans, current appraisals less costs to sell to establish realizable value. The following tables summarize our average recorded investment and interest income recognized on impaired loans by loan class for the three and nine months ended September 30, 2017 and 2016 (in thousands): Three Months Ended Three Months Ended Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized Commercial real estate: Owner-occupied $ 3,657 $ 3 $ 2,544 $ 3 Investment properties 8,849 37 19,046 74 Multifamily real estate 115 1 529 27 One- to four-family construction — — 1,176 3 Land and land development: Residential 1,095 6 1,964 20 Commercial 928 — 997 — Commercial business 8,128 6 4,283 16 Agricultural business/farmland 6,196 69 4,973 6 One- to four-family residential 8,899 73 11,973 131 Consumer: Consumer secured by one- to four-family 1,608 2 1,894 5 Consumer—other 140 1 512 3 $ 39,615 $ 198 $ 49,891 $ 288 Nine Months Ended Nine Months Ended Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized Commercial real estate: Owner-occupied $ 3,079 $ 7 $ 2,673 $ 9 Investment properties 8,393 124 19,775 224 Multifamily real estate 335 10 518 36 One- to four-family construction 524 27 1,151 56 Land and land development: Residential 1,574 42 1,971 63 Commercial 950 — 1,005 — Commercial business 5,838 63 4,470 28 Agricultural business/farmland 5,605 131 4,824 19 One- to four-family residential 9,602 240 12,193 358 Consumer: Consumer secured by one- to four-family 1,647 7 1,913 13 Consumer—other 194 5 572 10 $ 37,741 $ 656 $ 51,065 $ 816 Troubled Debt Restructurings. Some of the Company’s loans are reported as TDRs. Loans are reported as TDRs when the bank grants one or more concessions to a borrower experiencing financial difficulties that it would not otherwise consider. Examples of such concessions include forgiveness of principal or accrued interest, extending the maturity date(s) or providing a lower interest rate than would be normally available for a transaction of similar risk. Our TDRs have generally not involved forgiveness of amounts due, but almost always include a modification of multiple factors; the most common combination includes interest rate, payment amount and maturity date. As a result of these concessions, restructured loans are impaired as the Company will not collect all amounts due, both principal and interest, in accordance with the terms of the original loan agreement. Loans identified as TDRs are accounted for in accordance with the Company's impaired loan accounting policies. The following table presents TDRs by accrual and nonaccrual status at September 30, 2017 and December 31, 2016 (in thousands): September 30, 2017 December 31, 2016 Accrual Status Nonaccrual Status Total TDRs Accrual Nonaccrual Total Commercial real estate: Owner-occupied $ 200 $ 89 $ 289 $ 203 $ 96 $ 299 Investment properties 3,207 — 3,207 4,304 — 4,304 Multifamily real estate — — — 349 — 349 One- to four-family construction — — — 1,180 — 1,180 Land and land development: Residential 193 — 193 1,106 — 1,106 Commercial business 573 — 573 653 — 653 Agricultural business, including secured by farmland 3,172 29 3,201 3,125 79 3,204 One- to four-family residential 5,182 810 5,992 7,678 843 8,521 Consumer: Consumer secured by one- to four-family 140 1 141 143 6 149 Consumer—other 77 — 77 166 — 166 $ 12,744 $ 929 $ 13,673 $ 18,907 $ 1,024 $ 19,931 As of September 30, 2017 and December 31, 2016 , the Company had commitments to advance additional funds related to TDRs up to $59,000 and $127,000 , respectively. No new TDRs occurred during the nine months ended September 30, 2017 or 2016. There were no TDRs which incurred a payment default within twelve months of the restructure date during the three and nine -month periods ended September 30, 2017 and 2016 . A default on a TDR results in either a transfer to nonaccrual status or a partial charge-off, or both. Credit Quality Indicators : To appropriately and effectively manage the ongoing credit quality of the Company’s loan portfolio, management has implemented a risk-rating or loan grading system for its loans. The system is a tool to evaluate portfolio asset quality throughout each applicable loan’s life as an asset of the Company. Generally, loans and leases are risk rated on an aggregate borrower/relationship basis with individual loans sharing similar ratings. There are some instances when specific situations relating to individual loans will provide the basis for different risk ratings within the aggregate relationship. Loans are graded on a scale of 1 to 9. A description of the general characteristics of these categories is shown below: Overall Risk Rating Definitions : Risk-ratings contain both qualitative and quantitative measurements and take into account the financial strength of a borrower and the structure of the loan or lease. Consequently, the definitions are to be applied in the context of each lending transaction and judgment must also be used to determine the appropriate risk rating, as it is not unusual for a loan or lease to exhibit characteristics of more than one risk-rating category. Consideration for the final rating is centered in the borrower’s ability to repay, in a timely fashion, both principal and interest. There were no material changes in the risk-rating or loan grading system in the nine months ended September 30, 2017 . Risk Rating 1: Exceptional A credit supported by exceptional financial strength, stability, and liquidity. The risk rating of 1 is reserved for the Company’s top quality loans, generally reserved for investment grade credits underwritten to the standards of institutional credit providers. Risk Rating 2: Excellent A credit supported by excellent financial strength, stability and liquidity. The risk rating of 2 is reserved for very strong and highly stable customers with ready access to alternative financing sources. Risk Rating 3: Strong A credit supported by good overall financial strength and stability. Collateral margins are strong; cash flow is stable although susceptible to cyclical market changes. Risk Rating 4: Acceptable A credit supported by the borrower’s adequate financial strength and stability. Assets and cash flow are reasonably sound and provide for orderly debt reduction. Access to alternative financing sources will be more difficult to obtain. Risk Rating 5: Watch A credit with the characteristics of an acceptable credit which requires, however, more than the normal level of supervision and warrants formal quarterly management reporting. Credits in this category are not yet criticized or classified, but due to adverse events or aspects of underwriting require closer than normal supervision. Generally, credits should be watch credits in most cases for six months or less as the impact of stress factors are analyzed. Risk Rating 6: Special Mention A credit with potential weaknesses that deserves management’s close attention is risk rated a 6. If left uncorrected, these potential weaknesses will result in deterioration in the capacity to repay debt. A key distinction between Special Mention and Substandard is that in a Special Mention credit, there are identified weaknesses that pose potential risk(s) to the repayment sources, versus well defined weaknesses that pose risk(s) to the repayment sources. Assets in this category are expected to be in this category no more than 9 - 12 months as the potential weaknesses in the credit are resolved. Risk Rating 7: Substandard A credit with well defined weaknesses that jeopardize the ability to repay in full is risk rated a 7. These credits are inadequately protected by either the sound net worth and payment capacity of the borrower or the value of pledged collateral. These are credits with a distinct possibility of loss. Loans headed for foreclosure and/or legal action due to deterioration are rated 7 or worse. Risk Rating 8: Doubtful A credit with an extremely high probability of loss is risk rated 8. These credits have all the same critical weaknesses that are found in a substandard loan; however, the weaknesses are elevated to the point that based upon current information, collection or liquidation in full is improbable. While some loss on doubtful credits is expected, pending events may strengthen a credit making the amount and timing of any loss indeterminable. In these situations taking the loss is inappropriate until it is clear that the pending event has failed to strengthen the credit and improve the capacity to repay debt. Risk Rating 9: Loss A credit that is considered to be currently uncollectible or of such little value that it is no longer a viable Bank asset is risk rated 9. Losses should be taken in the accounting period in which the credit is determined to be uncollectible. Taking a loss does not mean that a credit has absolutely no recovery or salvage value but, rather, it is not practical or desirable to defer writing off the credit, even though partial recovery may occur in the future. The following tables present the Company’s portfolio of risk-rated loans and non-risk-rated loans by grade or other characteristics as of September 30, 2017 and December 31, 2016 (in thousands): September 30, 2017 By class: Pass (Risk Ratings 1-5) (1) Special Mention Substandard Doubtful Loss Total Loans Commercial real estate: Owner-occupied $ 1,339,550 $ 996 $ 28,584 $ — $ — $ 1,369,130 Investment properties 1,978,603 3,601 10,940 — — 1,993,144 Multifamily real estate 310,936 — 770 — — 311,706 Commercial construction 157,041 — — — — 157,041 Multifamily construction 136,532 — — — — 136,532 One- to four-family construction 397,135 — 2,226 — — 399,361 Land and land development: Residential 147,874 9,374 1,136 — — 158,384 Commercial 23,202 — 3,893 — — 27,095 Commercial business 1,241,338 19,068 51,003 — — 1,311,409 Agricultural business, including secured by farmland 317,808 3,390 18,734 — — 339,932 One- to four-family residential 864,053 674 4,829 — — 869,556 Consumer: Consumer secured by one- to four-family 532,907 — 2,393 — — 535,300 Consumer—other 165,444 17 398 — — 165,859 Total $ 7,612,423 $ 37,120 $ 124,906 $ — $ — $ 7,774,449 December 31, 2016 By class: Pass (Risk Ratings 1-5) (1) Special Mention Substandard Doubtful Loss Total Loans Commercial real estate: Owner-occupied $ 1,313,142 $ 14,394 $ 25,463 $ — $ — $ 1,352,999 Investment properties 1,948,822 23,846 13,668 — — 1,986,336 Multifamily real estate 247,258 — 892 — — 248,150 Commercial construction 124,068 — — — — 124,068 Multifamily construction 124,126 — — — — 124,126 One- to four-family construction 371,636 — 4,068 — — 375,704 Land and land development: Residential 167,764 — 2,240 — — 170,004 Commercial 25,090 — 4,094 — — 29,184 Commercial business 1,148,585 35,036 24,258 — — 1,207,879 Agricultural business, including secured by farmland 356,656 3,335 9,165 — — 369,156 One- to four-family residential 807,837 967 4,273 — — 813,077 Consumer: Consumer secured by one- to four-family 490,877 5 2,327 2 — 493,211 Consumer—other 156,547 108 594 5 — 157,254 Total $ 7,282,408 $ 77,691 $ 91,042 $ 7 $ — $ 7,451,148 (1) The Pass category includes some performing loans that are part of homogenous pools which are not individually risk-rated. This includes all consumer loans, all one - to four -family residential loans and, as of September 30, 2017 and December 31, 2016 , in the commercial business category, $296.0 million and $225.0 million , respectively, of credit-scored small business loans. As loans in these pools become non-performing, they are individually risk-rated. The following tables provide additional detail on the age analysis of the Company’s past due loans as of September 30, 2017 and December 31, 2016 (in thousands): September 30, 2017 30-59 Days Past Due 60-89 Days Past Due 90 Days or More Past Due Total Past Due Purchased Credit-Impaired Current Total Loans Loans 90 Days or More Past Due and Accruing Non-accrual Commercial real estate: Owner-occupied $ 414 $ 3,156 $ 3,360 $ 6,930 $ 7,896 $ 1,354,304 $ 1,369,130 $ — $ 7,438 Investment properties — — 4,136 4,136 7,788 1,981,220 1,993,144 53 4,194 Multifamily real estate 1,101 — — 1,101 173 310,432 311,706 — — Commercial construction 223 — — 223 — 156,818 157,041 — — Multifamily construction — — — — — 136,532 136,532 — — One-to-four-family construction — — — — 794 398,567 399,361 — — Land and land development: Residential 819 — 798 1,617 — 156,767 158,384 — 798 Commercial — — 928 928 2,965 23,202 27,095 — 928 Commercial business 1,712 371 5,192 7,275 2,608 1,301,526 1,311,409 51 7,144 Agricultural business, including secured by farmland 1,051 — 2,330 3,381 683 335,868 339,932 — 4,285 One- to four-family residential 431 628 2,211 3,270 265 866,021 869,556 722 2,878 Consumer: Consumer secured by one- to four-family 1,537 220 788 2,545 5 532,750 535,300 76 1,416 Consumer—other 290 173 26 489 44 165,326 165,859 25 46 Total $ 7,578 $ 4,548 $ 19,769 $ 31,895 $ 23,221 $ 7,719,333 $ 7,774,449 $ 927 $ 29,127 December 31, 2016 30-59 Days Past Due 60-89 Days Past Due 90 Days or More Past Due Total Past Due Purchased Credit-Impaired Current Total Loans Loans 90 Days or More Past Due and Accruing Non-accrual Commercial real estate: Owner-occupied $ 1,938 $ — $ 2,538 $ 4,476 $ 13,281 $ 1,335,242 $ 1,352,999 $ — $ 3,373 Investment properties 117 — 5,447 5,564 10,168 1,970,604 1,986,336 701 4,864 Multifamily real estate — — 147 147 139 247,864 248,150 147 — Commercial construction — — — — — 124,068 124,068 — — Multifamily construction — — — — — 124,126 124,126 — — One-to-four-family construction — — — — 862 374,842 375,704 — — Land and land development: Residential 48 — 750 798 — 169,206 170,004 — 750 Commercial — — 998 998 3,016 25,170 29,184 — 998 Commercial business 2,314 647 1,591 4,552 3,821 1,199,506 1,207,879 — 3,074 Agricultural business, including secured by farmland 360 1,244 2,768 4,372 684 364,100 369,156 — 3,229 One-to four-family residential 1,793 249 2,110 4,152 274 808,651 813,077 1,233 2,263 Consumer: Consumer secured by one- to four-family 932 160 986 2,078 18 491,115 493,211 61 1,660 Consumer—other 1,421 154 147 1,722 59 155,473 157,254 11 215 Total $ 8,923 $ 2,454 $ 17,482 $ 28,859 $ 32,322 $ 7,389,967 $ 7,451,148 $ 2,153 $ 20,426 The following tables provide additional information on the allowance for loan losses and loan balances individually and collectively evaluated for impairment at or for the three and nine months ended September 30, 2017 and 2016 (in thousands): For the Three Months Ended September 30, 2017 Commercial Real Estate Multifamily Real Estate Construction and Land Commercial Business Agricultural Business One- to Four-Family Residential Consumer Unallocated Total Allowance for loan losses: Beginning balance $ 24,232 $ 1,562 $ 27,312 $ 19,126 $ 3,808 $ 2,010 $ 3,987 $ 6,549 $ 88,586 Provision for loan losses (236 ) 63 2,037 (555 ) 1,141 22 117 (589 ) 2,000 Recoveries 19 — 73 577 1 8 98 — 776 Charge-offs (584 ) — — (491 ) (1,001 ) — (186 ) — (2,262 ) Ending balance $ 23,431 $ 1,625 $ 29,422 $ 18,657 $ 3,949 $ 2,040 $ 4,016 $ 5,960 $ 89,100 For the Nine months ended September 30, 2017 Commercial Real Estate Multifamily Construction and Land Commercial Business Agricultural Business One- to Four-Family Residential Consumer Unallocated Total Allowance for loan losses: Beginning balance $ 20,993 $ 1,360 $ 34,252 $ 16,533 $ 2,967 $ 2,238 $ 4,104 $ 3,550 $ 85,997 Provision for loan losses 2,716 254 (6,010 ) 4,489 2,113 (460 ) 488 2,410 6,000 Recoveries 353 11 1,180 921 133 262 293 — 3,153 Charge-offs (631 ) — — (3,286 ) (1,264 ) — (869 ) — (6,050 ) Ending balance $ 23,431 $ 1,625 $ 29,422 $ 18,657 $ 3,949 $ 2,040 $ 4,016 $ 5,960 $ 89,100 September 30, 2017 Commercial Real Estate Multifamily Construction and Land Commercial Business Agricultural Business One- to Four-Family Residential Consumer Unallocated Total Allowance for loan losses: Individually evaluated for impairment $ 263 $ — $ 67 $ 52 $ 196 $ 184 $ 11 $ — $ 773 Collectively evaluated for impairment 23,168 1,625 29,348 18,605 3,753 1,856 4,005 5,960 88,320 Purchased credit-impaired loans — — 7 — — — — — 7 Total allowance for loan losses $ 23,431 $ 1,625 $ 29,422 $ 18,657 $ 3,949 $ 2,040 $ 4,016 $ 5,960 $ 89,100 Loan balances: Individually evaluated for impairment $ 13,866 $ — $ 1,871 $ 5,899 $ 6,495 $ 5,182 $ 218 $ — $ 33,531 Collectively evaluated for impairment 3,332,724 311,533 872,783 1,302,902 332,754 864,109 700,892 — 7,717,697 Purchased credit-impaired loans 15,684 173 3,759 2,608 683 265 49 — 23,221 Total loans $ 3,362,274 $ 311,706 $ 878,413 $ 1,311,409 $ 339,932 $ 869,556 $ 701,159 $ — $ 7,774,449 For the Three Months Ended September 30, 2016 Commercial Real Estate Multifamily Construction and Land Commercial Business Agricultural Business One- to Four-Family Residential Consumer Unallocated Total Allowance for loan losses: Beginning balance $ 20,149 $ 1,515 $ 31,861 $ 17,758 $ 2,891 $ 2,204 $ 3,743 $ 1,197 $ 81,318 Provision for loan losses (337 ) (79 ) 1,269 (1,351 ) 80 (404 ) 348 2,474 2,000 Recoveries 34 — 673 433 (138 ) 482 73 — 1,557 Charge-offs — — — (333 ) — (92 ) (230 ) — (655 ) Ending balance $ 19,846 $ 1,436 $ 33,803 $ 16,507 $ 2,833 $ 2,190 $ 3,934 $ 3,671 $ 84,220 For the Nine Months Ended September 30, 2016 Commercial Real Estate Multifamily Construction and Land Commercial Business Agricultural Business One- to Four-Family Residential Consumer Unallocated Total Allowance for loan losses: Beginning balance $ 20,716 $ 4,195 $ 27,131 $ 13,856 $ 3,645 $ 4,732 $ 902 $ 2,831 $ 78,008 Provision for loan losses (788 ) (2,759 ) 5,404 1,519 (284 ) (3,468 ) 3,536 840 4,000 Recoveries 98 — 1,268 1,775 39 1,052 529 — 4,761 Charge-offs (180 ) — — (643 ) (567 ) (126 ) (1,033 ) — (2,549 ) Ending balance $ 19,846 $ 1,436 $ 33,803 $ 16,507 $ 2,833 $ 2,190 $ 3,934 $ 3,671 $ 84,220 September 30, 2016 Commercial Real Estate Multifamily Construction and Land Commercial Business Agricultural Business One- to Four-Family Residential Consumer Unallocated Total Allowance for loan losses: Individually evaluated for impairment $ 832 $ 65 $ 396 $ 54 $ — $ 456 $ 6 $ — $ 1,809 Collectively evaluated for impairment 19,014 1,371 33,374 16,453 2,833 1,734 3,928 3,671 82,378 Purchased credit-impaired loans — — 33 — — — — — 33 Total allowance for loan losses $ 19,846 $ 1,436 $ 33,803 $ 16,507 $ 2,833 $ 2,190 $ 3,934 $ 3,671 $ 84,220 Loan balances: Individually evaluated for impairment $ 16,630 $ 351 $ 4,137 $ 2,026 $ 2,758 $ 8,270 $ 315 $ — $ 34,487 Collectively evaluated for impairment 3,214,042 266,274 789,037 1,181,558 379,710 838,328 656,527 — 7,325,476 Purchased credit impaired loans 28,544 258 4,153 4,264 807 301 347 — 38,674 Total loans $ 3,259,216 $ 266,883 $ 797,327 $ 1,187,848 $ 383,275 $ 846,899 $ 657,189 $ — $ 7,398,637

REAL ESTATE OWNED, NET

REAL ESTATE OWNED, NET	9 Months Ended
	Sep. 30, 2017
Real Estate [Abstract]
REAL ESTATE OWNED, NET	REAL ESTATE OWNED, NET The following table presents the changes in REO for the three and nine months ended September 30, 2017 and 2016 (in thousands): Three Months Ended Nine Months Ended 2017 2016 2017 2016 Balance, beginning of the period $ 2,427 $ 6,147 $ 11,081 $ 11,627 Additions from loan foreclosures — 156 46 534 Additions from acquisitions — — — 400 Additions from capitalized costs — — 54 — Proceeds from dispositions of REO (961 ) (1,699 ) (11,382 ) (8,021 ) Gain on sale of REO 30 281 1,953 981 Valuation adjustments in the period — (168 ) (256 ) (804 ) Balance, end of the period $ 1,496 $ 4,717 $ 1,496 $ 4,717 REO properties are recorded at the estimated fair value of the property, less expected selling costs, establishing a new cost basis. Subsequently, REO properties are carried at the lower of the new cost basis or updated fair market values, based on updated appraisals of the underlying properties, as received. Valuation allowances on the carrying value of REO may be recognized based on updated appraisals or on management’s authorization to reduce the selling price of a property. At September 30, 2017 and December 31, 2016 , the Company had none and $917,000 , respectively, of foreclosed one- to four-family residential real estate properties held as REO. The recorded investment in one- to four-family residential loans in the process of foreclosure was $2.0 million at September 30, 2017 compared with $715,000 at December 31, 2016.

GOODWILL, OTHER INTANGIBLE ASSE

GOODWILL, OTHER INTANGIBLE ASSETS AND MORTGAGE SERVICING RIGHTS	9 Months Ended
	Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL, OTHER INTANGIBLE ASSETS AND MORTGAGE SERVICING RIGHTS	GOODWILL, OTHER INTANGIBLE ASSETS AND MORTGAGE SERVICING RIGHTS Goodwill and Other Intangible Assets: At September 30, 2017 , intangible assets are comprised of goodwill, CDI, and favorable leasehold intangibles (LHI) acquired in business combinations. Goodwill represents the excess of the purchase considerations paid over the fair value of the assets acquired, net of the fair values of liabilities assumed in a business combination, and is not amortized but is reviewed annually for impairment. At December 31, 2016, the Company completed its qualitative assessment of goodwill and concluded that it is more likely than not that the fair value of Banner, the reporting unit, exceeds the carrying value. The adjustments to goodwill in 2016 relate to changes in the preliminary goodwill recorded for the merger of Banner Bank and AmericanWest Bank (AmericanWest) in October, 2015, including adjustments to loan discount, deferred taxes and REO valuations. CDI represents the value of transaction-related deposits and the value of the customer relationships associated with the deposits. LHI represents the value ascribed to leases assumed in an acquisition in which the lease terms are favorable compared to a market lease at the date of acquisition. The Company amortizes CDI and LHI over their estimated useful lives and reviews them at least annually for events or circumstances that could impair their value. The following table summarizes the changes in the Company’s goodwill and other intangibles for the nine months ended September 30, 2017 and the year ended December 31, 2016 (in thousands): Goodwill CDI Favorable LHI Total Balance, December 31, 2015 $ 247,738 $ 36,762 $ 710 $ 285,210 Amortization — (7,061 ) (249 ) (7,310 ) Adjustments to goodwill (3,155 ) — — (3,155 ) Balance, December 31, 2016 244,583 29,701 461 274,745 Amortization — (4,790 ) (153 ) (4,943 ) Balance, September 30, 2017 $ 244,583 $ 24,911 $ 308 $ 269,802 The following table presents the estimated amortization expense with respect to CDI for the periods indicated (in thousands): Estimated Amortization Remainder of 2017 $ 1,542 2018 5,609 2019 4,889 2020 4,169 2021 3,448 Thereafter 5,254 $ 24,911 Mortgage Servicing Rights: Mortgage servicing rights are reported in other assets. Mortgage servicing rights are initially recorded at fair value and are amortized in proportion to, and over the period of, the estimated future net servicing income of the underlying financial assets. Mortgage servicing rights are subsequently evaluated for impairment based upon the fair value of the rights compared to the amortized cost (remaining unamortized initial fair value). If the fair value is less than the amortized cost, a valuation allowance is created through an impairment charge, which is recognized in servicing fee income on the consolidated statement of operations. However, if the fair value is greater than the amortized cost, the amount above the amortized cost is not recognized in the carrying value. During the three and nine months ended September 30, 2017 and 2016 , the Company did not record any impairment charges or recoveries against mortgage servicing rights. The unpaid principal balance for loans which mortgage servicing rights have been recorded totaled $2.13 billion and $2.05 billion at September 30, 2017 and December 31, 2016 , respectively. Custodial accounts maintained in connection with this servicing totaled $22.5 million and $10.3 million at September 30, 2017 and December 31, 2016 , respectively. An analysis of our mortgage servicing rights for the three and nine months ended September 30, 2017 and 2016 is presented below (in thousands): Three Months Ended Nine Months Ended 2017 2016 2017 2016 Balance, beginning of the period $ 14,985 $ 14,276 $ 15,249 $ 13,354 Additions—amounts capitalized 826 1,652 2,477 4,371 Amortization (1) (1,057 ) (1,102 ) (2,972 ) (2,899 ) Balance, end of the period (2) $ 14,754 $ 14,826 $ 14,754 $ 14,826 (1) Amortization of mortgage servicing rights is recorded as a reduction of loan servicing income and any unamortized balance is fully amortized if the loan repays in full. (2) There was no valuation allowance as of September 30, 2017 and 2016 .

DEPOSITS

DEPOSITS	9 Months Ended
	Sep. 30, 2017
Banking and Thrift [Abstract]
DEPOSITS	DEPOSITS Deposits consisted of the following at September 30, 2017 and December 31, 2016 (in thousands): September 30, 2017 December 31, 2016 Non-interest-bearing accounts $ 3,379,841 $ 3,140,451 Interest-bearing checking 955,486 914,484 Regular savings accounts 1,577,292 1,523,391 Money market accounts 1,525,657 1,497,755 Total interest-bearing transaction and saving accounts 4,058,435 3,935,630 Certificates of deposit: Certificates of deposit less than or equal to $250,000 945,161 884,403 Certificates of deposit greater than $250,000 155,413 160,930 Total certificates of deposit (1) 1,100,574 1,045,333 Total deposits $ 8,538,850 $ 8,121,414 Included in total deposits: Public fund transaction and savings accounts $ 194,519 $ 221,765 Public fund interest-bearing certificates 26,543 25,650 Total public deposits $ 221,062 $ 247,415 Total brokered deposits $ 171,718 $ 34,074 (1) Certificates of deposit include $30,000 and $426,000 of acquisition premiums at September 30, 2017 and December 31, 2016 , respectively. At September 30, 2017 and December 31, 2016 , the Company had certificates of deposit of $159.9 million and $165.4 million , respectively, that were equal to or greater than $250,000. Scheduled maturities and weighted average interest rates of certificate accounts at September 30, 2017 are as follows (dollars in thousands): September 30, 2017 Amount Weighted Average Rate Maturing in one year or less $ 808,770 0.51 % Maturing after one year through two years 107,060 0.69 Maturing after two years through three years 137,253 1.26 Maturing after three years through four years 27,870 1.08 Maturing after four years through five years 17,208 1.21 Maturing after five years 2,413 1.05 Total certificates of deposit $ 1,100,574 0.65 %

FAIR VALUE OF FINANCIAL INSTRUM

FAIR VALUE OF FINANCIAL INSTRUMENTS	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
FAIR VALUE ACCOUNTING AND MEASUREMENT	FAIR VALUE OF FINANCIAL INSTRUMENTS The following table presents estimated fair values of the Company’s financial instruments as of September 30, 2017 and December 31, 2016 , whether or not measured at fair value in the Consolidated Statements of Financial Condition (in thousands): September 30, 2017 December 31, 2016 Level Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value Assets: Cash and cash equivalents 1 $ 241,766 $ 241,766 $ 247,719 $ 247,719 Securities—trading 2,3 23,466 23,466 24,568 24,568 Securities—available-for-sale 2 1,339,057 1,339,057 800,917 800,917 Securities—held-to-maturity 2,3 264,752 268,663 267,873 270,528 Loans held for sale 2 71,905 72,018 246,353 246,815 Loans receivable 3 7,774,449 7,666,707 7,451,148 7,337,608 FHLB stock 3 20,854 20,854 12,506 12,506 Bank-owned life insurance 1 161,648 161,648 158,936 158,936 Mortgage servicing rights 3 14,754 18,312 15,249 16,740 Derivatives: Interest rate swaps 2 7,186 7,186 8,330 8,330 Interest rate lock and forward sales commitments 2 664 664 482 482 Liabilities: Demand, interest checking and money market accounts 2 5,860,984 5,860,984 5,552,690 5,552,690 Regular savings 2 1,577,292 1,577,292 1,523,391 1,523,391 Certificates of deposit 2 1,100,574 1,082,829 1,045,333 1,028,866 FHLB advances 2 263,349 263,349 54,216 54,216 Other borrowings 2 103,713 103,713 105,685 105,685 Junior subordinated debentures 3 97,280 97,280 95,200 95,200 Derivatives: Interest rate swaps 2 7,186 7,186 8,330 8,330 Interest rate lock and forward sales commitments 2 115 115 289 289 The Company measures and discloses certain assets and liabilities at fair value. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (that is, not a forced liquidation or distressed sale). GAAP establishes a consistent framework for measuring fair value and disclosure requirements about fair value measurements. Among other things, the accounting standard requires the reporting entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect the Company’s estimates for market assumptions. These two types of inputs create the following fair value hierarchy: • Level 1 – Quoted prices in active markets for identical instruments. An active market is a market in which transactions occur with sufficient frequency and volume to provide pricing information on an ongoing basis. A quoted price in an active market provides the most reliable evidence of fair value and shall be used to measure fair value whenever available. • Level 2 – Observable inputs other than Level 1 including quoted prices in active markets for similar instruments, quoted prices in less active markets for identical or similar instruments, or other observable inputs that can be corroborated by observable market data. • Level 3 – Unobservable inputs supported by little or no market activity for financial instruments whose value is determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which the determination of fair value requires significant management judgment or estimation; also includes observable inputs from non-binding single dealer quotes not corroborated by observable market data. The estimated fair value amounts of financial instruments have been determined by the Company using available market information and appropriate valuation methodologies. However, considerable judgment is required to interpret data to develop the estimates of fair value. Accordingly, the estimates presented herein are not necessarily indicative of the amounts the Company could realize at a future date. The use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts. In addition, reasonable comparability between financial institutions may not be likely due to the wide range of permitted valuation techniques and numerous estimates that must be made given the absence of active secondary markets for certain financial instruments. This lack of uniform valuation methodologies also introduces a greater degree of subjectivity to these estimated fair values. Transfers between levels of the fair value hierarchy are deemed to occur at the end of the reporting period. Items Measured at Fair Value on a Recurring Basis: The following tables present financial assets and liabilities measured at fair value on a recurring basis and the level within the fair value hierarchy of the fair value measurements for those assets and liabilities as of September 30, 2017 and December 31, 2016 (in thousands): September 30, 2017 Level 1 Level 2 Level 3 Total Assets: Securities—trading U.S. Government and agency obligations $ — $ 1,305 $ — $ 1,305 Municipal bonds — 331 — 331 Corporate bonds (Trust Preferred Securities) — — 21,675 21,675 Equity securities — 155 — 155 — 1,791 21,675 23,466 Securities—available-for-sale U.S. Government and agency obligations — 87,585 — 87,585 Municipal bonds — 114,646 — 114,646 Corporate bonds — 10,602 — 10,602 Mortgage-backed or related securities — 1,092,432 — 1,092,432 Asset-backed securities — 28,207 — 28,207 Equity securities — 5,585 — 5,585 — 1,339,057 — 1,339,057 Loans held for sale — 64,399 — 64,399 Derivatives Interest rate swaps — 7,186 — 7,186 Interest rate lock and forward sales commitments — 664 — 664 $ — $ 1,413,097 $ 21,675 $ 1,434,772 Liabilities: Advances from FHLB $ — $ 263,349 $ — $ 263,349 Junior subordinated debentures, net of unamortized deferred issuance costs — — 97,280 97,280 Derivatives Interest rate swaps — 7,186 — 7,186 Interest rate lock and forward sales commitments — 115 — 115 $ — $ 270,650 $ 97,280 $ 367,930 December 31, 2016 Level 1 Level 2 Level 3 Total Assets: Securities—trading U.S. Government and agency obligations $ — $ 1,326 $ — $ 1,326 Municipal bonds — 335 — 335 Corporate Bonds (Trust Preferred Securities) — — 21,143 21,143 Mortgage-backed securities — 1,641 — 1,641 Equity securities — 123 — 123 — 3,425 21,143 24,568 Securities—available-for-sale U.S. Government and agency obligations — 56,978 — 56,978 Municipal bonds — 109,853 — 109,853 Corporate bonds — 10,283 — 10,283 Mortgage-backed securities — 594,712 — 594,712 Asset-backed securities — 28,993 — 28,993 Equity securities — 98 — 98 — 800,917 — 800,917 Loans held for sale — 9,600 — 9,600 Derivatives Interest rate swaps — 8,330 — 8,330 Interest rate lock and forward sales commitments — 482 — 482 $ — $ 822,754 $ 21,143 $ 843,897 Liabilities: Advances from FHLB $ — $ 54,216 $ — $ 54,216 Junior subordinated debentures, net of unamortized deferred issuance costs — — 95,200 95,200 Derivatives Interest rate swaps — 8,330 — 8,330 Interest rate lock and forward sales commitments — 289 — 289 $ — $ 62,835 $ 95,200 $ 158,035 The following methods were used to estimate the fair value of each class of financial instruments above: Cash and Cash Equivalents: The carrying amount of these items is a reasonable estimate of their fair value. Securities: The estimated fair values of investment securities and mortgaged-backed securities are priced using current active market quotes, if available, which are considered Level 1 measurements. For most of the portfolio, matrix pricing based on the securities’ relationship to other benchmark quoted prices is used to establish the fair value. These measurements are considered Level 2. Due to the continued limited activity in the trust preferred markets that have limited the observability of market spreads for some of the Company’s Trust Preferred Securities (TPS) securities, management has classified these securities as a Level 3 fair value measure. Management periodically reviews the pricing information received from third-party pricing services and tests those prices against other sources to validate the reported fair values. Loans Held for Sale: Fair values for residential mortgage loans held for sale are determined by comparing actual loan rates to current secondary market prices for similar loans. Fair values for multifamily loans held for sale are calculated based on discounted cash flows using as a discount rate a combination of market spreads for similar loan types added to selected index rates. Loans Receivable: Fair values are estimated first by stratifying the portfolios of loans with similar financial characteristics. Loans are segregated by type such as multifamily real estate, residential mortgage, nonresidential mortgage, commercial/agricultural, consumer and other. Each loan category is further segmented into fixed- and adjustable-rate interest terms. A preliminary estimate of fair value is then calculated based on discounted cash flows using as a discount rate the current rate offered on similar products, plus an adjustment for liquidity to reflect the non-homogeneous nature of the loans. The preliminary estimate is then further reduced by the amount of the allowance for loan losses to arrive at a final estimate of fair value. Fair value for impaired loans is also based on recent appraisals or estimated cash flows discounted using rates commensurate with risk associated with the estimated cash flows. Assumptions regarding credit risk, cash flows and discount rates are judgmentally determined using available market information and specific borrower information. FHLB Stock: The fair value is based upon the redemption value of the stock which equates to its carrying value. Bank-Owned Life Insurance: The fair value of BOLI policies owned is based on the various insurance contracts' cash surrender value. Mortgage Servicing Rights: Fair values are estimated based on an independent dealer analysis of discounted cash flows. The evaluation utilizes assumptions market participants would use in determining fair value including prepayment speeds, delinquency and foreclosure rates, the discount rate, servicing costs, and the timing of cash flows. The mortgage servicing portfolio is stratified by loan type and fair value estimates are adjusted up or down based on the serviced loan interest rates versus current rates on new loan originations since the most recent independent analysis. Deposits: The carrying amount of deposits with no stated maturity, such as savings and checking accounts, is a reasonable estimate of their fair value. The market value of certificates of deposit is based upon the discounted value of contractual cash flows. The discount rate is determined using current market rates on comparable instruments. FHLB Advances: Fair valuations for Banner’s FHLB advances are estimated using fair market values provided by the lender, the FHLB of Des Moines. The FHLB of Des Moines prices advances by discounting the future contractual cash flows for individual advances, using its current cost of funds curve to provide the discount rate. Junior Subordinated Debentures: The fair value of junior subordinated debentures is estimated using a discounted cash flow approach. The significant inputs included in the estimation of fair value are the credit risk adjusted spread and three month LIBOR. The credit risk adjusted spread represents the nonperformance risk of the liability. The Company utilizes an external valuation firm to assist management in validating the reasonableness of the credit risk adjusted spread used to determine the fair value. The junior subordinated debentures are carried at fair value which represents the estimated amount that would be paid to transfer these liabilities in an orderly transaction amongst market participants. Due to credit concerns in the capital markets and inactivity in the trust preferred markets that have limited the observability of market spreads, management has classified this as a Level 3 fair value measure. Other Borrowings: Other borrowings include securities sold under agreements to repurchase and occasionally federal funds purchased and their carrying amount is considered a reasonable approximation of their fair value. Derivatives: Derivatives include interest rate swap agreements, interest rate lock commitments to originate loans held for sale and forward sales contracts to sell loans and securities related to mortgage banking activities. Fair values for these instruments, which generally change as a result of changes in the level of market interest rates, are estimated based on dealer quotes and secondary market sources. Off-Balance-Sheet Items: Off-balance-sheet financial instruments include unfunded commitments to extend credit, including standby letters of credit, and commitments to purchase investment securities. The fair value of these instruments is not considered to be material. Limitations: The fair value estimates presented herein are based on pertinent information available to management as of September 30, 2017 and December 31, 2016 . The factors used in the fair values estimates are subject to change subsequent to the dates the fair value estimates are completed, therefore, current estimates of fair value may differ significantly from the amounts presented herein. Assets and Liabilities Measured at Fair Value Using Significant Unobservable Inputs (Level 3): The following table provides a description of the valuation technique, unobservable inputs, and qualitative information about the unobservable inputs for certain of the Company's assets and liabilities classified as Level 3 and measured at fair value on a recurring and non-recurring basis at September 30, 2017 and December 31, 2016 : Weighted Average Rate / Range Financial Instruments Valuation Techniques Unobservable Inputs September 30, 2017 December 31, 2016 Corporate Bonds (TPS securities) Discounted cash flows Discount rate 6.33 % 6.00 % Junior subordinated debentures Discounted cash flows Discount rate 6.33 % 6.00 % Impaired loans Collateral Valuations Discount to appraised value 8.5% to 9.0% n/a REO Appraisals Discount to appraised value 17.0% to 42.0% 0% to 45% TPS securities : Management believes that the credit risk-adjusted spread used to develop the discount rate utilized in the fair value measurement of TPS securities is indicative of the risk premium a willing market participant would require under current market conditions for instruments with similar contractual rates and terms and conditions and issuers with similar credit risk profiles and with similar expected probability of default. Management attributes the change in fair value of these instruments, compared to their par value, primarily to perceived general market adjustments to the risk premiums for these types of assets subsequent to their issuance. Junior subordinated debentures : Similar to the TPS securities discussed above, management believes that the credit risk-adjusted spread utilized in the fair value measurement of the junior subordinated debentures is indicative of the risk premium a willing market participant would require under current market conditions for an issuer with Banner's credit risk profile. Management attributes the change in fair value of the junior subordinated debentures, compared to their par value, primarily to perceived general market adjustments to the risk premiums for these types of liabilities subsequent to their issuance. Future contractions in the risk adjusted spread relative to the spread currently utilized to measure the Company's junior subordinated debentures at fair value as of September 30, 2017 , or the passage of time, will result in negative fair value adjustments. At September 30, 2017 , the discount rate utilized was based on a credit spread of 500 basis points and three-month LIBOR of 133 basis points. The following tables provide a reconciliation of the assets and liabilities measured at fair value using significant unobservable inputs (Level 3) on a recurring basis during the three and nine months ended September 30, 2017 and 2016 (in thousands): Three Months Ended Nine Months Ended September 30, 2017 September 30, 2017 Level 3 Fair Value Inputs Level 3 Fair Value Inputs TPS Securities Borrowings—Junior Subordinated Debentures TPS Securities Borrowings— Junior Subordinated Debentures Beginning balance $ 21,568 $ 96,852 $ 21,143 $ 95,200 Total gains or losses recognized Assets gains 107 — 532 — Liabilities losses — 428 — 2,080 Ending balance at September 30, 2017 $ 21,675 $ 97,280 $ 21,675 $ 97,280 Three Months Ended Nine Months Ended September 30, 2016 September 30, 2016 Level 3 Fair Value Inputs Level 3 Fair Value Inputs TPS Securities Borrowings—Junior Subordinated Debentures TPS Securities Borrowings— Junior Subordinated Debentures Beginning balance $ 20,645 $ 93,298 $ 18,699 $ 92,480 Total gains or losses recognized Assets gains 280 — 501 — Liabilities losses — 1,066 — 1,884 Purchases, issuances and settlements, including acquisitions — — 1,725 — Ending balance at September 30, 2016 $ 20,925 $ 94,364 $ 20,925 $ 94,364 The Company has elected to continue to recognize the interest income and dividends from the securities reclassified to fair value as a component of interest income as was done in prior years when they were classified as available-for-sale. Interest expense related to the FHLB advances and junior subordinated debentures continues to be measured based on contractual interest rates and reported in interest expense. The change in fair market value of these financial instruments has been recorded as a component of non-interest income. Items Measured at Fair Value on a Non-recurring Basis: The following tables present financial assets measured at fair value on a non-recurring basis and the level within the fair value hierarchy of the fair value measurements for those assets as of September 30, 2017 and December 31, 2016 (in thousands): September 30, 2017 Level 1 Level 2 Level 3 Total Impaired loans $ — $ 7,494 $ — $ 7,494 REO — — 1,496 1,496 December 31, 2016 Level 1 Level 2 Level 3 Total REO $ — $ — $ 11,081 $ 11,081 The following table presents the losses resulting from non-recurring fair value adjustments for the three and nine months ended September 30, 2017 and 2016 (in thousands): Three months ended September 30, Nine months ended September 30, 2017 2016 2017 2016 Impaired loans $ (1,584 ) $ (128 ) $ (2,059 ) $ (182 ) REO — (168 ) (256 ) (599 ) Total loss from non-recurring measurements $ (1,584 ) $ (296 ) $ (2,315 ) $ (781 ) Impaired loans : Impaired loans are measured based on the present value of expected future cash flows discounted at the loan's effective interest rate or, as a practical expedient, at the loan's observable market price or the fair value of collateral if the loan is collateral dependent. If this practical expedient is used, the impaired loans are considered to be held at fair value. Subsequent changes in the value of impaired loans are included within the provision for loan losses in the same manner in which impairment initially was recognized or as a reduction in the provision that would otherwise be reported. Impaired loans are periodically evaluated to determine if valuation adjustments, or partial write-downs, should be recorded. The need for valuation adjustments arises when observable market prices or current appraised values of collateral indicate a shortfall in collateral value compared to current carrying values of the related loan. If the Company determines that the value of the impaired loan is less than the carrying value of the loan, the Company either establishes an impairment reserve as a specific component of the allowance for loan losses or charges off the impaired amount. These valuation adjustments are considered non-recurring fair value adjustments. The remaining impaired loans are evaluated for reserve needs in homogenous pools within the Company’s methodology for assessing the adequacy of the allowance for loan losses. REO : The Company records REO (acquired through a lending relationship) at fair value on a non-recurring basis. Fair value adjustments on REO are based on updated real estate appraisals which are based on current market conditions. All REO properties are recorded at the lower of the estimated fair value of the real estate, less expected selling costs, or the carrying amount of the defaulted loans. From time to time, non-recurring fair value adjustments to REO are recorded to reflect partial write-downs based on an observable market price or current appraised value of property. Banner considers any valuation inputs related to REO to be Level 3 inputs. The individual carrying values of these assets are reviewed for impairment at least annually and any additional impairment charges are expensed to operations.

INCOME TAXES AND DEFERRED TAXES

INCOME TAXES AND DEFERRED TAXES	9 Months Ended
	Sep. 30, 2017
Income Tax Disclosure [Abstract]
INCOME TAXES AND DEFERRED TAXES	INCOME TAXES AND DEFERRED TAXES The Company files a consolidated income tax return including all of its wholly-owned subsidiaries on a calendar year basis. Income taxes are accounted for using the asset and liability method. Under this method, a deferred tax asset or liability is determined based on the enacted tax rates which will be in effect when the differences between the financial statement carrying amounts and tax basis of existing assets and liabilities are expected to be reported in the Company’s income tax returns. The effect on deferred taxes of a change in tax rates is recognized in income in the period of change. A valuation allowance is recognized as a reduction to deferred tax assets when management determines it is more likely than not that deferred tax assets will not be available to offset future income tax liabilities. Accounting standards for income taxes prescribe a recognition threshold and measurement process for financial statement recognition and measurement of uncertain tax positions taken or expected to be taken in a tax return, and also provide guidance on the de-recognition of previously recorded benefits and their classification, as well as the proper recording of interest and penalties, accounting in interim periods, disclosures and transition. The Company periodically reviews its income tax positions based on tax laws and regulations and financial reporting considerations, and records adjustments as appropriate. This review takes into consideration the status of current taxing authorities’ examinations of the Company’s tax returns, recent positions taken by the taxing authorities on similar transactions, if any, and the overall tax environment. As of September 30, 2017 , the Company had an insignificant amount of unrecognized tax benefits for uncertain tax positions, none of which would materially affect the effective tax rate if recognized. The Company does not anticipate that the amount of unrecognized tax benefits will significantly increase or decrease in the next twelve months. The Company’s policy is to recognize interest and penalties on unrecognized tax benefits in the income tax expense. The Company files consolidated income tax returns in the U.S. federal jurisdiction and in the Oregon, California, Utah and Idaho state jurisdictions. Tax credit investments: The Company invests in low income housing tax credit funds that are designed to generate a return primarily through the realization of federal tax credits. The Company accounts for these investments by amortizing the cost of tax credit investments over the life of the investment using a proportional amortization method and tax credit investment amortization expense is a component of the provision for income taxes. The following table presents the balances of the Company’s tax credit investments and related unfunded commitments at September 30, 2017 and December 31, 2016 (in thousands): September 30, 2017 December 31, 2016 Tax credit investments $ 4,058 $ 4,654 Unfunded commitments—tax credit investments $ 638 $ 665 The following table presents other information related to the Company's tax credit investments for the three and nine months ended September 30, 2017 and 2016 (in thousands): Three Months Ended Nine Months Ended 2017 2016 2017 2016 Tax credits and other tax benefits recognized $ 285 $ 284 $ 855 $ 852 Tax credit amortization expense included in provision for income taxes $ 199 $ 168 597 504

CALCULATION OF WEIGHTED AVERAGE

CALCULATION OF WEIGHTED AVERAGE SHARES OUTSTANDING FOR EARNINGS PER SHARE (EPS)	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
CALCULATION OF WEIGHTED AVERAGE SHARES OUTSTANDING FOR EARNINGS PER SHARE (EPS)	CALCULATION OF WEIGHTED AVERAGE SHARES OUTSTANDING FOR EARNINGS PER SHARE (EPS) The following table reconciles basic to diluted weighted shares outstanding used to calculate earnings per share data (in thousands, except shares and per share data): Three Months Ended Nine Months Ended 2017 2016 2017 2016 Net income $ 25,077 $ 23,851 $ 74,324 $ 62,581 Basic weighted average shares outstanding 32,982,532 34,045,225 32,966,214 34,050,459 Plus unvested restricted stock 96,567 79,386 94,958 54,416 Diluted weighted shares outstanding 33,079,099 34,124,611 33,061,172 34,104,875 Earnings per common share Basic $ 0.76 $ 0.70 $ 2.25 $ 1.84 Diluted $ 0.76 $ 0.70 $ 2.25 $ 1.83 As of September 30, 2017 , warrants expiring on November 21, 2018 to purchase up to $18.6 million ( 243,998 shares, post reverse-split) of common stock were not included in the computation of diluted earnings per share because the exercise price of the warrants was greater than the average market price of common shares.

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 AND STOCK OPTIONS	STOCK-BASED COMPENSATION PLANS The Company operates the following stock-based compensation plans as approved by its shareholders: • 2012 Restricted Stock and Incentive Bonus Plan (2012 Restricted Stock Plan). • 2014 Omnibus Incentive Plan (the 2014 Plan). The purpose of these plans is to promote the success and enhance the value of the Company by providing a means for attracting and retaining highly skilled employees, officers and directors of Banner Corporation and its affiliates and linking their personal interests with those of the Company's shareholders. Under these plans the Company currently has outstanding restricted stock share grants and restricted stock unit grants. 2012 Restricted Stock and Incentive Bonus Plan Under the 2012 Restricted Stock Plan, which was initially approved on April 24, 2012, the Company is authorized to issue up to 300,000 shares of its common stock to provide a means for attracting and retaining highly skilled officers of Banner Corporation and its affiliates. Shares granted under the 2012 Restricted Stock Plan have a minimum vesting period of three years. The 2012 Restricted Stock Plan will continue in effect for a term of ten years, after which no further awards may be granted. The 2012 Restricted Stock Plan was amended on April 23, 2013 to provide for the ability to grant (1) cash-denominated incentive-based awards payable in cash or common stock, including those that are eligible to qualify as qualified performance-based compensation for the purposes of Section 162(m) of the Code and (2) restricted stock awards that qualify as qualified performance-based compensation for the purposes of Section 162(m) of the Code. Vesting requirements may include time-based conditions, performance-based conditions, or market-based conditions. As of September 30, 2017 , the Company had granted 270,961 shares of restricted stock from the 2012 Restricted Stock Plan (as amended and restated), of which 242,972 shares had vested and 27,989 shares remain unvested. 2014 Omnibus Incentive Plan The 2014 Plan was approved by shareholders on April 22, 2014. The 2014 Plan provides for the grant of incentive stock options, non-qualified stock options, stock appreciation rights, restricted stock, restricted stock units, performance shares, performance units, other stock-based awards and other cash awards, and provides for vesting requirements which may include time-based or performance-based conditions. The Company reserved 900,000 shares of its common stock for issuance under the 2014 Plan in connection with the exercise of awards. As of September 30, 2017 , 372,512 restricted stock shares and 34,975 restricted stock units have been granted under the 2014 Plan of which 81,148 restricted stock shares and 20,967 restricted stock units have vested. The expense associated with all restricted stock grants (including restricted stock shares and restricted stock units) was $1.6 million and $4.2 million for the three and nine -month periods ended September 30, 2017 and $1.4 million and $4.0 million for the three and nine -month periods ended September 30, 2016 , respectively. Unrecognized compensation expense for these awards as of September 30, 2017 was $9.8 million and will be amortized over the next 34 months .

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	9 Months Ended
	Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Lease Commitments — The Company leases 115 buildings and offices under non-cancelable operating leases. The leases contain various provisions for increases in rental rates, based either on changes in the published Consumer Price Index or a predetermined escalation schedule. Substantially all of the leases provide the Company with the option to extend the lease term one or more times following expiration of the initial term. Financial Instruments with Off-Balance-Sheet Risk — The Company has financial instruments with off-balance-sheet risk generated in the normal course of business to meet the financing needs of our customers. These financial instruments include commitments to extend credit, commitments related to standby letters of credit, commitments to originate loans, commitments to sell loans, commitments to buy and sell securities. These instruments involve, to varying degrees, elements of credit and interest rate risk similar to the risk involved in on-balance-sheet items recognized in our Consolidated Statements of Financial Condition. Our exposure to credit loss in the event of nonperformance by the other party to the financial instrument from commitments to extend credit and standby letters of credit is represented by the contractual notional amount of those instruments. We use the same credit policies in making commitments and conditional obligations as for on-balance-sheet instruments. Outstanding commitments for which no asset or liability for the notional amount has been recorded consisted of the following at the dates indicated (in thousands): Contract or Notional Amount September 30, 2017 December 31, 2016 Commitments to extend credit $ 2,339,558 $ 2,204,795 Standby letters of credit and financial guarantees 15,432 17,694 Commitments to originate loans 64,263 69,833 Risk participation agreement 11,516 7,488 Derivatives also included in Note 13: Commitments to originate loans held for sale 68,976 69,487 Commitments to sell loans secured by one- to four-family residential properties 39,848 36,907 Commitments to sell securities related to mortgage banking activities 100,500 44,000 Commitments to extend credit are agreements to lend to a customer, as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Many of the commitments may expire without being drawn upon; therefore, the total commitment amounts do not necessarily represent future cash requirements. Each customer’s creditworthiness is evaluated on a case-by-case basis. The amount of collateral obtained, if deemed necessary upon extension of credit, is based on management’s credit evaluation of the customer. The type of collateral held varies, but may include accounts receivable, inventory, property, plant and equipment, and income producing commercial properties. The Company's reserve for unfunded loan commitments was $2.4 million and $3.6 million at September 30, 2017 and December 31, 2016 , respectively. Standby letters of credit are conditional commitments issued to guarantee a customer’s performance or payment to a third party. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers. Through the acquisition of AmericanWest, Banner Bank assumed a risk participation agreement. Under the risk participation agreement, Banner Bank guarantees the financial performance of a borrower on the participated portion of an interest rate swap on a loan. Interest rates on residential one- to four-family mortgage loan applications are typically rate locked (committed) to customers during the application stage for periods ranging from 30 to 60 days, the most typical period being 45 days. Traditionally, these loan applications with rate lock commitments had the pricing for the sale of these loans locked with various qualified investors under a best-efforts delivery program at or near the time the interest rate is locked with the customer. The Bank then attempts to deliver these loans before their rate locks expired. This arrangement generally required delivery of the loans prior to the expiration of the rate lock. Delays in funding the loans required a lock extension. The cost of a lock extension at times was borne by the customer and at times by the Bank. These lock extension costs have not had a material impact to our operations. The Company enters into forward commitments at specific prices and settlement dates to deliver either: (1) residential mortgage loans for purchase by secondary market investors (i.e., Freddie Mac or Fannie Mae), or (2) mortgage-backed securities to broker/dealers. The purpose of these forward commitments is to offset the movement in interest rates between the execution of its residential mortgage rate lock commitments with borrowers and the sale of those loans to the secondary market investor. There were no counterparty default losses on forward contracts during the three and nine months ended September 30, 2017 or September 30, 2016 . Market risk with respect to forward contracts arises principally from changes in the value of contractual positions due to changes in interest rates. The Company limits its exposure to market risk by monitoring differences between commitments to customers and forward contracts with market investors and securities broker/dealers. In the event the Company has forward delivery contract commitments in excess of available mortgage loans, the transaction is completed by either paying or receiving a fee to or from the investor or broker/dealer equal to the increase or decrease in the market value of the forward contract. In the normal course of business, the Company and/or its subsidiaries have various legal proceedings and other contingent matters outstanding. These proceedings and the associated legal claims are often contested and the outcome of individual matters is not always predictable. These claims and counter-claims typically arise during the course of collection efforts on problem loans or with respect to action to enforce liens on properties in which the Banks hold a security interest. Based upon the information known to management at this time, the Company and the Banks are not a party to any legal proceedings that management believes would have a material adverse effect on the results of operations or consolidated financial position at September 30, 2017 . In connection with certain asset sales, the Banks typically make representations and warranties about the underlying assets conforming to specified guidelines. If the underlying assets do not conform to the specifications, the Bank may have an obligation to repurchase the assets or indemnify the purchaser against any loss. The Banks believe that the potential for material loss under these arrangements is remote. Accordingly, the fair value of such obligations is not material.

DERIVATIVES AND HEDGING

DERIVATIVES AND HEDGING	9 Months Ended
	Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVES AND HEDGING	DERIVATIVES AND HEDGING The Company, through its Banner Bank subsidiary, is party to various derivative instruments that are used for asset and liability management and customer financing needs. Derivative instruments are contracts between two or more parties that have a notional amount and an underlying variable, require no net investment and allow for the net settlement of positions. The notional amount serves as the basis for the payment provision of the contract and takes the form of units, such as shares or dollars. The underlying variable represents a specified interest rate, index, or other component. The interaction between the notional amount and the underlying variable determines the number of units to be exchanged between the parties and influences the market value of the derivative contract. The Company obtains dealer quotations to value its derivative contracts. The Company's predominant derivative and hedging activities involve interest rate swaps related to certain term loans and forward sales contracts associated with mortgage banking activities. Generally, these instruments help the Company manage exposure to market risk and meet customer financing needs. Market risk represents the possibility that economic value or net interest income will be adversely affected by fluctuations in external factors such as market-driven interest rates and prices or other economic factors. Derivatives Designated in Hedge Relationships The Company's fixed rate loans result in exposure to losses in value or net interest income as interest rates change. The risk management objective for hedging fixed rate loans is to effectively convert the fixed rate received to a floating rate. The Company has hedged exposure to changes in the fair value of certain fixed rate loans through the use of interest rate swaps. For a qualifying fair value hedge, changes in the value of the derivatives are recognized in current period earnings along with the corresponding changes in the fair value of the designated hedged item attributable to the risk being hedged. Under a prior program, customers received fixed interest rate commercial loans and the Banner Bank subsequently hedged that fixed rate loan by entering into an interest rate swap with a dealer counterparty. Banner Bank receives fixed rate payments from the customers on the loans and makes similar fixed rate payments to the dealer counterparty on the swaps in exchange for variable rate payments based on the one-month LIBOR index. Some of these interest rate swaps are designated as fair value hedges. Through application of the “short cut method of accounting,” there is an assumption that the hedges are effective. Banner Bank discontinued originating interest rate swaps under this program in 2008. As of September 30, 2017 and December 31, 2016 , the notional values or contractual amounts and fair values of the Company's derivatives designated in hedge relationships were as follows (in thousands): Asset Derivatives Liability Derivatives September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 Notional/ Contract Amount Fair Value (1) Notional/ Contract Amount Fair Value (1) Notional/ Contract Amount Fair Value (2) Notional/ Contract Amount Fair Value (2) Interest rate swaps $ 4,441 $ 531 $ 5,855 $ 660 $ 4,441 $ 531 $ 5,855 $ 660 (1) Included in Loans receivable on the Consolidated Statements of Financial Condition. (2) Included in Other liabilities on the Consolidated Statements of Financial Condition. Derivatives Not Designated in Hedge Relationships Interest Rate Swaps: Banner Bank uses an interest rate swap program for commercial loan customers, that provides the client with a variable rate loan and enters into an interest rate swap in which the client locks in a fixed rate and the Bank receives a variable rate payment. The Bank offsets its risk exposure by entering into an offsetting interest rate swap with a dealer counterparty for the same notional amount and length of term as the client interest rate swap providing the dealer counterparty with a fixed-rate payment in exchange for a variable-rate payment. These swaps do not qualify as designated hedges; therefore, each swap is accounted for as a free standing derivative. Mortgage Banking: In the normal course of business, the Company sells originated one- to four-family and multifamily mortgage loans into the secondary mortgage loan markets. During the period of loan origination and prior to the sale of the loans in the secondary market, the Company has exposure to movements in interest rates associated with written interest rate lock commitments with potential borrowers to originate one- to four-family loans that are intended to be sold and for closed one- to four-family and multifamily mortgage loans held for sale that are awaiting sale and delivery into the secondary market. The Company attempts to economically hedge the risk of changing interest rates associated with these mortgage loan commitments by entering into forward sales contracts to sell one- to four-family and multifamily mortgage loans or mortgage-backed securities to broker/dealers as specific prices and dates. As of September 30, 2017 and December 31, 2016 , the notional values or contractual amounts and fair values of the Company's derivatives not designated in hedge relationships were as follows (in thousands): Asset Derivatives Liability Derivatives September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 Notional/ Contract Amount Fair Value (1) Notional/ Contract Amount Fair Value (1) Notional/ Contract Amount Fair Value (2) Notional/ Contract Amount Fair Value (2) Interest rate swaps $ 303,500 $ 6,655 $ 309,936 $ 7,670 $ 303,500 $ 6,655 $ 309,936 $ 7,670 Mortgage loan commitments 46,351 265 42,296 30 22,625 115 27,191 174 Forward sales contracts 140,348 399 71,192 452 — — 9,715 115 $ 490,199 $ 7,319 $ 423,424 $ 8,152 $ 326,125 $ 6,770 $ 346,842 $ 7,959 (1) Included in Other assets on the Consolidated Statements of Financial Condition, with the exception of certain interest swaps and mortgage loan commitments (with a fair value of $216,000 at September 30, 2017 and $822,000 at December 31, 2016 ), which are included in Loans receivable. (2) Included in Other liabilities on the Consolidated Statements of Financial Condition. Gains (losses) recognized in income on derivatives not designated in hedge relationships for the three and nine months ended September 30, 2017 and 2016 were as follows (in thousands): Location on Consolidated Statements of Operations Three Months Ended Nine Months Ended 2017 2016 2017 2016 Mortgage loan commitments Mortgage banking operations $ 50 $ (376 ) $ 235 $ 516 Forward sales contracts Mortgage banking operations (398 ) 315 (654 ) (297 ) $ (348 ) $ (61 ) $ (419 ) $ 219 The Company is exposed to credit-related losses in the event of nonperformance by the counterparty to these agreements. Credit risk of the financial contract is controlled through the credit approval, limits, and monitoring procedures and management does not expect the counterparties to fail their obligations. In connection with the interest rate swaps between Banner Bank and the dealer counterparties, the agreements contain a provision where if Banner Bank fails to maintain its status as a well/adequately capitalized institution, then the counterparty could terminate the derivative positions and Banner Bank would be required to settle its obligations. Similarly, Banner Bank could be required to settle its obligations under certain of its agreements if specific regulatory events occur, such as a publicly issued prompt corrective action directive, cease and desist order, or a capital maintenance agreement that required Banner Bank to maintain a specific capital level. If Banner Bank had breached any of these provisions at September 30, 2017 or December 31, 2016 , it could have been required to settle its obligations under the agreements at the termination value. As of September 30, 2017 and December 31, 2016 , the termination value of derivatives in a net liability position related to these agreements was $4.5 million and $7.6 million , respectively. The Company generally posts collateral against derivative liabilities in the form of cash, government agency-issued bonds, mortgage-backed securities, or commercial mortgage-backed securities. Collateral posted against derivative liabilities was $18.4 million and $29.3 million as of September 30, 2017 and December 31, 2016 , respectively. Derivative assets and liabilities are recorded at fair value on the balance sheet and do not take into account the effects of master netting agreements. Master netting agreements allow the Company to settle all derivative contracts held with a single counterparty on a net basis and to offset net derivative positions with related collateral where applicable. The following tables illustrate the potential effect of the Company's derivative master netting arrangements, by type of financial instrument, on the Company's Consolidated Statements of Financial Condition as of September 30, 2017 and December 31, 2016 (in thousands): September 30, 2017 Gross Amounts of Financial Instruments Not Offset in the Consolidated Statements of Financial Condition Gross Amounts Recognized Amounts offset in the Statement of Financial Condition Net Amounts in the Statement of Financial Condition Netting Adjustment Per Applicable Master Netting Agreements Fair Value of Financial Collateral in the Statement of Financial Condition Net Amount Derivative assets Interest rate swaps $ 7,186 $ — $ 7,186 $ (1,148 ) $ — $ 6,038 $ 7,186 $ — $ 7,186 $ (1,148 ) $ — $ 6,038 Derivative liabilities Interest rate swaps $ 7,186 $ — $ 7,186 $ (1,148 ) $ (4,461 ) $ 1,577 $ 7,186 $ — $ 7,186 $ (1,148 ) $ (4,461 ) $ 1,577 December 31, 2016 Gross Amounts of Financial Instruments Not Offset in the Consolidated Statements of Financial Condition Gross Amounts Recognized Amounts offset in the Statement of Financial Condition Net Amounts in the Statement of Financial Condition Netting Adjustment Per Applicable Master Netting Agreements Fair Value of Financial Collateral in the Statement of Financial Condition Net Amount Derivative assets Interest rate swaps $ 8,330 $ — $ 8,330 $ (362 ) $ — $ 7,968 $ 8,330 $ — $ 8,330 $ (362 ) $ — $ 7,968 Derivative liabilities Interest rate swaps $ 8,330 $ — $ 8,330 $ (362 ) $ (7,557 ) $ 411 $ 8,330 $ — $ 8,330 $ (362 ) $ (7,557 ) $ 411

SUBSEQUENT EVENT (Notes)

SUBSEQUENT EVENT (Notes)	9 Months Ended
	Sep. 30, 2017
Subsequent Event [Line Items]
Subsequent Events [Text Block]	SUBSEQUENT EVENT On October 6, 2017, Banner Bank completed the sale of its Utah branches and related assets and liabilities to People’s Intermountain Bank, a banking subsidiary of People’s Utah Bancorp (NASDAQ: PUB). Under the terms of the purchase and assumption agreement, the sale included approximately $255 million in loans, $160 million in deposits and all of Banner Bank’s seven Utah branches located in Provo, Orem, Salem, Springville, South Jordan, Salt Lake City and Woods Cross. The sale also included $3.9 million of property and equipment and $581,000 of accrued interest. In addition, Banner wrote off an associated $1.8 million of goodwill and $1.1 million of other intangibles. The deposit premium paid to Banner was $13.8 million based on average deposits at closing. The net gain recorded on the sale was approximately $12 million .

BASIS OF PRESENTATION AND SIG23

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Policies)	9 Months Ended
	Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Accounting	The accompanying unaudited condensed consolidated financial statements include the accounts of Banner Corporation (the Company or Banner), a bank holding company incorporated in the State of Washington and its wholly-owned subsidiaries, Banner Bank and Islanders Bank (the Banks). These unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (GAAP) for interim financial information and in accordance with the instructions to Form 10-Q and Article 10 of Regulation S-X as promulgated by the Securities and Exchange Commission (SEC). In preparing these financial statements, the Company has evaluated events and transactions subsequent to September 30, 2017 for potential recognition or disclosure. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation of the financial position and results of operations for the periods presented have been included. Certain information and disclosures normally included in annual financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to the rules and regulations of the SEC and the accounting standards for interim financial statements. Certain reclassifications have been made to the 2016 Consolidated Financial Statements and/or schedules to conform to the 2017 presentation. These reclassifications may have affected certain ratios for the prior periods. The effect of these reclassifications is considered immaterial. All significant intercompany transactions and balances have been eliminated. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect amounts reported in the financial statements. Various elements of the Company’s accounting policies, by their nature, are inherently subject to estimation techniques, valuation assumptions and other subjective assessments. In particular, management has identified several accounting policies that, due to the judgments, estimates and assumptions inherent in those policies, are significant to an understanding of Banner’s financial statements. These policies relate to (i) the methodology for the recognition of interest income, (ii) determination of the provision and allowance for loan losses, (iii) the valuation of financial assets and liabilities recorded at fair value, including other-than-temporary impairment (OTTI) losses, (iv) the valuation of intangibles, such as goodwill, core deposit intangibles (CDI) and mortgage servicing rights, (v) the valuation of real estate held for sale, (vi) the valuation of assets and liabilities acquired in business combinations and subsequent recognition of related income and expense, and (vii) the valuation or recognition of deferred tax assets and liabilities. These policies and judgments, estimates and assumptions are described in greater detail in subsequent notes to the Consolidated Financial Statements and Management’s Discussion and Analysis of Financial Condition and Results of Operations (Critical Accounting Policies) in our Annual Report on Form 10-K for the year ended December 31, 2016 filed with the SEC. There have been no significant changes in our application of accounting policies during the first nine months of 2017 . The information included in this Form 10-Q should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2016 as filed with the SEC ( 2016 Form 10-K). Interim results are not necessarily indicative of results for a full year or any other interim period.

SECURITIES (Tables)

SECURITIES (Tables)	9 Months Ended
	Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Schedule of Securities	The amortized cost, gross unrealized gains and losses and estimated fair value of securities at September 30, 2017 and December 31, 2016 are summarized as follows (in thousands): September 30, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Trading: U.S. Government and agency obligations $ 1,230 $ 1,305 Municipal bonds 330 331 Corporate bonds 27,089 21,675 Equity securities 14 155 $ 28,663 $ 23,466 Available-for-Sale: U.S. Government and agency obligations $ 87,509 $ 379 $ (303 ) $ 87,585 Municipal bonds 113,794 1,194 (342 ) 114,646 Corporate bonds 10,567 79 (44 ) 10,602 Mortgage-backed or related securities 1,093,203 4,103 (4,874 ) 1,092,432 Asset-backed securities 28,104 157 (54 ) 28,207 Equity securities 5,686 10 (111 ) 5,585 $ 1,338,863 $ 5,922 $ (5,728 ) $ 1,339,057 Held-to-Maturity: U.S. Government and agency obligations $ 1,035 $ 24 $ — $ 1,059 Municipal bonds: 193,987 4,638 (1,015 ) 197,610 Corporate bonds 4,265 — — 4,265 Mortgage-backed or related securities 65,465 476 (212 ) 65,729 $ 264,752 $ 5,138 $ (1,227 ) $ 268,663 December 31, 2016 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Trading: U.S. Government and agency obligations $ 1,230 $ 1,326 Municipal bonds 331 335 Corporate bonds 26,959 21,143 Mortgage-backed or related securities 1,620 1,641 Equity securities 14 123 $ 30,154 $ 24,568 Available-for-Sale: U.S. Government and agency obligations $ 57,288 $ 146 $ (456 ) $ 56,978 Municipal bonds 110,487 455 (1,089 ) 109,853 Corporate bonds 10,255 77 (49 ) 10,283 Mortgage-backed or related securities 598,899 2,064 (6,251 ) 594,712 Asset-backed securities 29,319 — (326 ) 28,993 Equity securities 88 10 — 98 $ 806,336 $ 2,752 $ (8,171 ) $ 800,917 Held-to-Maturity: U.S. Government and agency obligations $ 1,065 $ — $ (18 ) $ 1,047 Municipal bonds: 196,989 4,173 (1,272 ) 199,890 Corporate bonds 3,876 — — 3,876 Mortgage-backed or related securities 65,943 309 (537 ) 65,715 $ 267,873 $ 4,482 $ (1,827 ) $ 270,528
Schedule of Securities with Continuous Loss Position	At September 30, 2017 and December 31, 2016 , the gross unrealized losses and the fair value for securities available-for-sale and held-to-maturity aggregated by the length of time that individual securities have been in a continuous unrealized loss position was as follows (in thousands): September 30, 2017 Less Than 12 Months 12 Months or More Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Available-for-Sale: U.S. Government and agency obligations $ 39,846 $ (286 ) $ 5,680 $ (17 ) $ 45,526 $ (303 ) Municipal bonds 32,559 (169 ) 13,023 (173 ) 45,582 (342 ) Corporate bonds 300 (1 ) 4,814 (43 ) 5,114 (44 ) Mortgage-backed or related securities 437,934 (3,417 ) 95,051 (1,457 ) 532,985 (4,874 ) Asset-backed securities 9,968 (54 ) — — 9,968 (54 ) Equity securities 5,487 (111 ) — — 5,487 (111 ) $ 526,094 $ (4,038 ) $ 118,568 $ (1,690 ) $ 644,662 $ (5,728 ) Held-to-Maturity Municipal bonds $ 40,230 $ (903 ) $ 4,347 $ (112 ) $ 44,577 $ (1,015 ) Mortgage-backed or related securities 18,889 (212 ) — — 18,889 (212 ) $ 59,119 $ (1,115 ) $ 4,347 $ (112 ) $ 63,466 $ (1,227 ) December 31, 2016 Less Than 12 Months 12 Months or More Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Available-for-Sale: U.S. Government and agency obligations $ 39,043 $ (442 ) $ 1,012 $ (14 ) $ 40,055 $ (456 ) Municipal bonds 60,765 (1,087 ) 556 (2 ) 61,321 (1,089 ) Corporate bonds 5,206 (49 ) — — 5,206 (49 ) Mortgage-backed or related securities 403,431 (5,604 ) 47,467 (647 ) 450,898 (6,251 ) Asset-backed securities 9,928 (101 ) 19,064 (225 ) 28,992 (326 ) $ 518,373 $ (7,283 ) $ 68,099 $ (888 ) $ 586,472 $ (8,171 ) Held-to-Maturity U.S. Government and agency obligations $ 1,047 $ (18 ) $ — $ — $ 1,047 $ (18 ) Municipal bonds 64,802 (1,267 ) 204 (5 ) 65,006 (1,272 ) Mortgage-backed or related securities 42,245 (537 ) — — 42,245 (537 ) $ 108,094 $ (1,822 ) $ 204 $ (5 ) $ 108,298 $ (1,827 )
Schedule of Securities by Contractual Maturity Date	The amortized cost and estimated fair value of securities at September 30, 2017 , by contractual maturity, are shown below (in thousands). Expected maturities will differ from contractual maturities because some securities may be called or prepaid with or without call or prepayment penalties. September 30, 2017 Trading Available-for-Sale Held-to-Maturity Amortized Cost Fair Value Amortized Cost Fair Value Amortized Cost Fair Value Maturing in one year or less $ 130 $ 131 $ 26,951 $ 26,911 $ 1,226 $ 1,226 Maturing after one year through five years 230 231 110,023 110,293 24,269 24,432 Maturing after five years through ten years 1,200 1,274 265,137 264,366 108,739 110,368 Maturing after ten years through twenty years 17,089 14,248 255,076 256,319 88,407 91,280 Maturing after twenty years 10,000 7,427 675,990 675,583 42,111 41,357 28,649 23,311 1,333,177 1,333,472 264,752 268,663 Equity securities 14 155 5,686 5,585 — — $ 28,663 $ 23,466 $ 1,338,863 $ 1,339,057 $ 264,752 $ 268,663
Schedule of Pledged Securities	The following table presents, as of September 30, 2017 , investment securities which were pledged to secure borrowings, public deposits or other obligations as permitted or required by law (in thousands): September 30, 2017 Carrying Value Amortized Cost Fair Value Purpose or beneficiary: State and local governments public deposits $ 127,661 $ 127,549 $ 130,380 Interest rate swap counterparties 16,172 16,197 16,218 Repurchase agreements 127,632 127,803 127,797 Other 3,949 3,948 3,888 Total pledged securities $ 275,414 $ 275,497 $ 278,283

LOANS RECEIVABLE AND THE ALLO25

LOANS RECEIVABLE AND THE ALLOWANCE FOR LOAN LOSSES (Tables)	9 Months Ended
	Sep. 30, 2017
Receivables [Abstract]
Schedule of Loans Receivable, Including Loans Held for Sale	Loans receivable at September 30, 2017 and December 31, 2016 are summarized as follows (dollars in thousands): September 30, 2017 December 31, 2016 Amount Percent of Total Amount Percent of Total Commercial real estate: Owner-occupied $ 1,369,130 17.6 % $ 1,352,999 18.1 % Investment properties 1,993,144 25.6 1,986,336 26.7 Multifamily real estate 311,706 4.0 248,150 3.3 Commercial construction 157,041 2.0 124,068 1.7 Multifamily construction 136,532 1.8 124,126 1.7 One- to four-family construction 399,361 5.1 375,704 5.0 Land and land development: Residential 158,384 2.0 170,004 2.3 Commercial 27,095 0.4 29,184 0.4 Commercial business 1,311,409 16.9 1,207,879 16.2 Agricultural business, including secured by farmland 339,932 4.4 369,156 5.0 One- to four-family residential 869,556 11.2 813,077 10.9 Consumer: Consumer secured by one- to four-family 535,300 6.9 493,211 6.6 Consumer—other 165,859 2.1 157,254 2.1 Total loans 7,774,449 100.0 % 7,451,148 100.0 % Less allowance for loan losses (89,100 ) (85,997 ) Net loans $ 7,685,349 $ 7,365,151 Loan amounts included unamortized costs of $389,000 as of September 30, 2017 and were net of unearned fees of $5.8 million as of December 31, 2016 . Net loans include net discounts on acquired loans of $23.4 million and $31.1 million as of September 30, 2017 and December 31, 2016 , respectively.
Schedule of Purchased Credit-Impaired Loans, Changes in Accretable Yield	The following table presents the changes in the accretable yield for PCI loans for the three and nine months ended September 30, 2017 and 2016 (in thousands): Three Months Ended Nine Months Ended 2017 2016 2017 2016 Balance, beginning of period $ 7,666 $ 11,035 $ 8,717 $ 10,375 Accretion to interest income (1,720 ) (1,811 ) (5,210 ) (6,349 ) Disposals — (899 ) (497 ) (1,018 ) Reclassifications from non-accretable difference 918 1,120 3,854 6,437 Balance, end of period $ 6,864 $ 9,445 $ 6,864 $ 9,445
Impaired loans excluding purchased credit impaired loans [Table Text Block]	The following tables provide information on impaired loans, excluding PCI loans, with and without allowance reserves at September 30, 2017 and December 31, 2016 . Recorded investment includes the unpaid principal balance or the carrying amount of loans less charge-offs and net deferred loan fees (in thousands): September 30, 2017 Unpaid Principal Balance Recorded Investment Related Allowance Without Allowance (1) With Allowance (2) Commercial real estate: Owner-occupied $ 8,250 $ 7,438 $ 200 $ 19 Investment properties 7,657 4,247 3,208 245 Land and land development: Residential 1,322 798 193 66 Commercial 1,538 928 — — Commercial business 7,945 7,195 573 52 Agricultural business/farmland 8,579 6,956 500 196 One- to four-family residential 8,858 2,878 5,904 184 Consumer: Consumer secured by one- to four-family 1,698 1,492 140 7 Consumer—other 147 71 77 4 $ 45,994 $ 32,003 $ 10,795 $ 773 December 31, 2016 Unpaid Principal Balance Recorded Investment Related Allowance Without Allowance (1) With Allowance (2) Commercial real estate: Owner-occupied $ 3,786 $ 3,373 $ 203 $ 20 Investment properties 9,916 5,565 4,304 408 Multifamily real estate 508 147 349 64 One- to four-family construction 1,180 — 1,180 156 Land and land development: Residential 3,012 750 1,106 219 Commercial 1,608 998 — — Commercial business 3,753 3,074 651 69 Agricultural business/farmland 6,438 6,354 — — One- to four-family residential 11,439 3,149 8,026 479 Consumer: Consumer secured by one- to four-family 1,904 1,721 144 1 Consumer—other 391 226 166 4 $ 43,935 $ 25,357 $ 16,129 $ 1,420 (1) Includes loans without an allowance reserve that have been individually evaluated for impairment and that evaluation concluded that no reserve was needed and $9.3 million and $10.0 million of homogenous and small balance loans as of September 30, 2017 and December 31, 2016 , respectively, that are collectively evaluated for impairment for which a general reserve has been established. (2) Loans with a specific allowance reserve have been individually evaluated for impairment using either a discounted cash flow analysis or, for collateral dependent loans, current appraisals less costs to sell to establish realizable value.
Schedule of Impaired Loans With and Without Specific Reserves	The following tables summarize our average recorded investment and interest income recognized on impaired loans by loan class for the three and nine months ended September 30, 2017 and 2016 (in thousands): Three Months Ended Three Months Ended Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized Commercial real estate: Owner-occupied $ 3,657 $ 3 $ 2,544 $ 3 Investment properties 8,849 37 19,046 74 Multifamily real estate 115 1 529 27 One- to four-family construction — — 1,176 3 Land and land development: Residential 1,095 6 1,964 20 Commercial 928 — 997 — Commercial business 8,128 6 4,283 16 Agricultural business/farmland 6,196 69 4,973 6 One- to four-family residential 8,899 73 11,973 131 Consumer: Consumer secured by one- to four-family 1,608 2 1,894 5 Consumer—other 140 1 512 3 $ 39,615 $ 198 $ 49,891 $ 288 Nine Months Ended Nine Months Ended Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized Commercial real estate: Owner-occupied $ 3,079 $ 7 $ 2,673 $ 9 Investment properties 8,393 124 19,775 224 Multifamily real estate 335 10 518 36 One- to four-family construction 524 27 1,151 56 Land and land development: Residential 1,574 42 1,971 63 Commercial 950 — 1,005 — Commercial business 5,838 63 4,470 28 Agricultural business/farmland 5,605 131 4,824 19 One- to four-family residential 9,602 240 12,193 358 Consumer: Consumer secured by one- to four-family 1,647 7 1,913 13 Consumer—other 194 5 572 10 $ 37,741 $ 656 $ 51,065 $ 816
Schedule of Troubled Debt Restructurings	The following table presents TDRs by accrual and nonaccrual status at September 30, 2017 and December 31, 2016 (in thousands): September 30, 2017 December 31, 2016 Accrual Status Nonaccrual Status Total TDRs Accrual Nonaccrual Total Commercial real estate: Owner-occupied $ 200 $ 89 $ 289 $ 203 $ 96 $ 299 Investment properties 3,207 — 3,207 4,304 — 4,304 Multifamily real estate — — — 349 — 349 One- to four-family construction — — — 1,180 — 1,180 Land and land development: Residential 193 — 193 1,106 — 1,106 Commercial business 573 — 573 653 — 653 Agricultural business, including secured by farmland 3,172 29 3,201 3,125 79 3,204 One- to four-family residential 5,182 810 5,992 7,678 843 8,521 Consumer: Consumer secured by one- to four-family 140 1 141 143 6 149 Consumer—other 77 — 77 166 — 166 $ 12,744 $ 929 $ 13,673 $ 18,907 $ 1,024 $ 19,931 As of September 30, 2017 and December 31, 2016 , the Company had commitments to advance additional funds related to TDRs up to $59,000 and $127,000 , respectively.
Schedule of Risk-Rated Loans and Non-Risk Rated Loans by Grade and Other Characteristics	The following tables present the Company’s portfolio of risk-rated loans and non-risk-rated loans by grade or other characteristics as of September 30, 2017 and December 31, 2016 (in thousands): September 30, 2017 By class: Pass (Risk Ratings 1-5) (1) Special Mention Substandard Doubtful Loss Total Loans Commercial real estate: Owner-occupied $ 1,339,550 $ 996 $ 28,584 $ — $ — $ 1,369,130 Investment properties 1,978,603 3,601 10,940 — — 1,993,144 Multifamily real estate 310,936 — 770 — — 311,706 Commercial construction 157,041 — — — — 157,041 Multifamily construction 136,532 — — — — 136,532 One- to four-family construction 397,135 — 2,226 — — 399,361 Land and land development: Residential 147,874 9,374 1,136 — — 158,384 Commercial 23,202 — 3,893 — — 27,095 Commercial business 1,241,338 19,068 51,003 — — 1,311,409 Agricultural business, including secured by farmland 317,808 3,390 18,734 — — 339,932 One- to four-family residential 864,053 674 4,829 — — 869,556 Consumer: Consumer secured by one- to four-family 532,907 — 2,393 — — 535,300 Consumer—other 165,444 17 398 — — 165,859 Total $ 7,612,423 $ 37,120 $ 124,906 $ — $ — $ 7,774,449 December 31, 2016 By class: Pass (Risk Ratings 1-5) (1) Special Mention Substandard Doubtful Loss Total Loans Commercial real estate: Owner-occupied $ 1,313,142 $ 14,394 $ 25,463 $ — $ — $ 1,352,999 Investment properties 1,948,822 23,846 13,668 — — 1,986,336 Multifamily real estate 247,258 — 892 — — 248,150 Commercial construction 124,068 — — — — 124,068 Multifamily construction 124,126 — — — — 124,126 One- to four-family construction 371,636 — 4,068 — — 375,704 Land and land development: Residential 167,764 — 2,240 — — 170,004 Commercial 25,090 — 4,094 — — 29,184 Commercial business 1,148,585 35,036 24,258 — — 1,207,879 Agricultural business, including secured by farmland 356,656 3,335 9,165 — — 369,156 One- to four-family residential 807,837 967 4,273 — — 813,077 Consumer: Consumer secured by one- to four-family 490,877 5 2,327 2 — 493,211 Consumer—other 156,547 108 594 5 — 157,254 Total $ 7,282,408 $ 77,691 $ 91,042 $ 7 $ — $ 7,451,148 (1) The Pass category includes some performing loans that are part of homogenous pools which are not individually risk-rated. This includes all consumer loans, all one - to four -family residential loans and, as of September 30, 2017 and December 31, 2016 , in the commercial business category, $296.0 million and $225.0 million , respectively, of credit-scored small business loans. As loans in these pools become non-performing, they are individually risk-rated.
Schedule of Age Analysis of the Company's Past Due Loans	The following tables provide additional detail on the age analysis of the Company’s past due loans as of September 30, 2017 and December 31, 2016 (in thousands): September 30, 2017 30-59 Days Past Due 60-89 Days Past Due 90 Days or More Past Due Total Past Due Purchased Credit-Impaired Current Total Loans Loans 90 Days or More Past Due and Accruing Non-accrual Commercial real estate: Owner-occupied $ 414 $ 3,156 $ 3,360 $ 6,930 $ 7,896 $ 1,354,304 $ 1,369,130 $ — $ 7,438 Investment properties — — 4,136 4,136 7,788 1,981,220 1,993,144 53 4,194 Multifamily real estate 1,101 — — 1,101 173 310,432 311,706 — — Commercial construction 223 — — 223 — 156,818 157,041 — — Multifamily construction — — — — — 136,532 136,532 — — One-to-four-family construction — — — — 794 398,567 399,361 — — Land and land development: Residential 819 — 798 1,617 — 156,767 158,384 — 798 Commercial — — 928 928 2,965 23,202 27,095 — 928 Commercial business 1,712 371 5,192 7,275 2,608 1,301,526 1,311,409 51 7,144 Agricultural business, including secured by farmland 1,051 — 2,330 3,381 683 335,868 339,932 — 4,285 One- to four-family residential 431 628 2,211 3,270 265 866,021 869,556 722 2,878 Consumer: Consumer secured by one- to four-family 1,537 220 788 2,545 5 532,750 535,300 76 1,416 Consumer—other 290 173 26 489 44 165,326 165,859 25 46 Total $ 7,578 $ 4,548 $ 19,769 $ 31,895 $ 23,221 $ 7,719,333 $ 7,774,449 $ 927 $ 29,127 December 31, 2016 30-59 Days Past Due 60-89 Days Past Due 90 Days or More Past Due Total Past Due Purchased Credit-Impaired Current Total Loans Loans 90 Days or More Past Due and Accruing Non-accrual Commercial real estate: Owner-occupied $ 1,938 $ — $ 2,538 $ 4,476 $ 13,281 $ 1,335,242 $ 1,352,999 $ — $ 3,373 Investment properties 117 — 5,447 5,564 10,168 1,970,604 1,986,336 701 4,864 Multifamily real estate — — 147 147 139 247,864 248,150 147 — Commercial construction — — — — — 124,068 124,068 — — Multifamily construction — — — — — 124,126 124,126 — — One-to-four-family construction — — — — 862 374,842 375,704 — — Land and land development: Residential 48 — 750 798 — 169,206 170,004 — 750 Commercial — — 998 998 3,016 25,170 29,184 — 998 Commercial business 2,314 647 1,591 4,552 3,821 1,199,506 1,207,879 — 3,074 Agricultural business, including secured by farmland 360 1,244 2,768 4,372 684 364,100 369,156 — 3,229 One-to four-family residential 1,793 249 2,110 4,152 274 808,651 813,077 1,233 2,263 Consumer: Consumer secured by one- to four-family 932 160 986 2,078 18 491,115 493,211 61 1,660 Consumer—other 1,421 154 147 1,722 59 155,473 157,254 11 215 Total $ 8,923 $ 2,454 $ 17,482 $ 28,859 $ 32,322 $ 7,389,967 $ 7,451,148 $ 2,153 $ 20,426
Allowance for Credit Losses on Financing Receivables	The following tables provide additional information on the allowance for loan losses and loan balances individually and collectively evaluated for impairment at or for the three and nine months ended September 30, 2017 and 2016 (in thousands): For the Three Months Ended September 30, 2017 Commercial Real Estate Multifamily Real Estate Construction and Land Commercial Business Agricultural Business One- to Four-Family Residential Consumer Unallocated Total Allowance for loan losses: Beginning balance $ 24,232 $ 1,562 $ 27,312 $ 19,126 $ 3,808 $ 2,010 $ 3,987 $ 6,549 $ 88,586 Provision for loan losses (236 ) 63 2,037 (555 ) 1,141 22 117 (589 ) 2,000 Recoveries 19 — 73 577 1 8 98 — 776 Charge-offs (584 ) — — (491 ) (1,001 ) — (186 ) — (2,262 ) Ending balance $ 23,431 $ 1,625 $ 29,422 $ 18,657 $ 3,949 $ 2,040 $ 4,016 $ 5,960 $ 89,100 For the Nine months ended September 30, 2017 Commercial Real Estate Multifamily Construction and Land Commercial Business Agricultural Business One- to Four-Family Residential Consumer Unallocated Total Allowance for loan losses: Beginning balance $ 20,993 $ 1,360 $ 34,252 $ 16,533 $ 2,967 $ 2,238 $ 4,104 $ 3,550 $ 85,997 Provision for loan losses 2,716 254 (6,010 ) 4,489 2,113 (460 ) 488 2,410 6,000 Recoveries 353 11 1,180 921 133 262 293 — 3,153 Charge-offs (631 ) — — (3,286 ) (1,264 ) — (869 ) — (6,050 ) Ending balance $ 23,431 $ 1,625 $ 29,422 $ 18,657 $ 3,949 $ 2,040 $ 4,016 $ 5,960 $ 89,100 September 30, 2017 Commercial Real Estate Multifamily Construction and Land Commercial Business Agricultural Business One- to Four-Family Residential Consumer Unallocated Total Allowance for loan losses: Individually evaluated for impairment $ 263 $ — $ 67 $ 52 $ 196 $ 184 $ 11 $ — $ 773 Collectively evaluated for impairment 23,168 1,625 29,348 18,605 3,753 1,856 4,005 5,960 88,320 Purchased credit-impaired loans — — 7 — — — — — 7 Total allowance for loan losses $ 23,431 $ 1,625 $ 29,422 $ 18,657 $ 3,949 $ 2,040 $ 4,016 $ 5,960 $ 89,100 Loan balances: Individually evaluated for impairment $ 13,866 $ — $ 1,871 $ 5,899 $ 6,495 $ 5,182 $ 218 $ — $ 33,531 Collectively evaluated for impairment 3,332,724 311,533 872,783 1,302,902 332,754 864,109 700,892 — 7,717,697 Purchased credit-impaired loans 15,684 173 3,759 2,608 683 265 49 — 23,221 Total loans $ 3,362,274 $ 311,706 $ 878,413 $ 1,311,409 $ 339,932 $ 869,556 $ 701,159 $ — $ 7,774,449 For the Three Months Ended September 30, 2016 Commercial Real Estate Multifamily Construction and Land Commercial Business Agricultural Business One- to Four-Family Residential Consumer Unallocated Total Allowance for loan losses: Beginning balance $ 20,149 $ 1,515 $ 31,861 $ 17,758 $ 2,891 $ 2,204 $ 3,743 $ 1,197 $ 81,318 Provision for loan losses (337 ) (79 ) 1,269 (1,351 ) 80 (404 ) 348 2,474 2,000 Recoveries 34 — 673 433 (138 ) 482 73 — 1,557 Charge-offs — — — (333 ) — (92 ) (230 ) — (655 ) Ending balance $ 19,846 $ 1,436 $ 33,803 $ 16,507 $ 2,833 $ 2,190 $ 3,934 $ 3,671 $ 84,220 For the Nine Months Ended September 30, 2016 Commercial Real Estate Multifamily Construction and Land Commercial Business Agricultural Business One- to Four-Family Residential Consumer Unallocated Total Allowance for loan losses: Beginning balance $ 20,716 $ 4,195 $ 27,131 $ 13,856 $ 3,645 $ 4,732 $ 902 $ 2,831 $ 78,008 Provision for loan losses (788 ) (2,759 ) 5,404 1,519 (284 ) (3,468 ) 3,536 840 4,000 Recoveries 98 — 1,268 1,775 39 1,052 529 — 4,761 Charge-offs (180 ) — — (643 ) (567 ) (126 ) (1,033 ) — (2,549 ) Ending balance $ 19,846 $ 1,436 $ 33,803 $ 16,507 $ 2,833 $ 2,190 $ 3,934 $ 3,671 $ 84,220 September 30, 2016 Commercial Real Estate Multifamily Construction and Land Commercial Business Agricultural Business One- to Four-Family Residential Consumer Unallocated Total Allowance for loan losses: Individually evaluated for impairment $ 832 $ 65 $ 396 $ 54 $ — $ 456 $ 6 $ — $ 1,809 Collectively evaluated for impairment 19,014 1,371 33,374 16,453 2,833 1,734 3,928 3,671 82,378 Purchased credit-impaired loans — — 33 — — — — — 33 Total allowance for loan losses $ 19,846 $ 1,436 $ 33,803 $ 16,507 $ 2,833 $ 2,190 $ 3,934 $ 3,671 $ 84,220 Loan balances: Individually evaluated for impairment $ 16,630 $ 351 $ 4,137 $ 2,026 $ 2,758 $ 8,270 $ 315 $ — $ 34,487 Collectively evaluated for impairment 3,214,042 266,274 789,037 1,181,558 379,710 838,328 656,527 — 7,325,476 Purchased credit impaired loans 28,544 258 4,153 4,264 807 301 347 — 38,674 Total loans $ 3,259,216 $ 266,883 $ 797,327 $ 1,187,848 $ 383,275 $ 846,899 $ 657,189 $ — $ 7,398,637

REAL ESTATE OWNED, NET (Tables)

REAL ESTATE OWNED, NET (Tables)	9 Months Ended
	Sep. 30, 2017
Real Estate [Abstract]
Schedule of Changes in Real Estate Owned, Net of Valuation Adjustments	The following table presents the changes in REO for the three and nine months ended September 30, 2017 and 2016 (in thousands): Three Months Ended Nine Months Ended 2017 2016 2017 2016 Balance, beginning of the period $ 2,427 $ 6,147 $ 11,081 $ 11,627 Additions from loan foreclosures — 156 46 534 Additions from acquisitions — — — 400 Additions from capitalized costs — — 54 — Proceeds from dispositions of REO (961 ) (1,699 ) (11,382 ) (8,021 ) Gain on sale of REO 30 281 1,953 981 Valuation adjustments in the period — (168 ) (256 ) (804 ) Balance, end of the period $ 1,496 $ 4,717 $ 1,496 $ 4,717

GOODWILL, OTHER INTANGIBLE AS27

GOODWILL, OTHER INTANGIBLE ASSETS AND MORTGAGE SERVICING RIGHTS (Tables)	9 Months Ended
	Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Changes in Goodwill and Intangible Assets	The following table summarizes the changes in the Company’s goodwill and other intangibles for the nine months ended September 30, 2017 and the year ended December 31, 2016 (in thousands): Goodwill CDI Favorable LHI Total Balance, December 31, 2015 $ 247,738 $ 36,762 $ 710 $ 285,210 Amortization — (7,061 ) (249 ) (7,310 ) Adjustments to goodwill (3,155 ) — — (3,155 ) Balance, December 31, 2016 244,583 29,701 461 274,745 Amortization — (4,790 ) (153 ) (4,943 ) Balance, September 30, 2017 $ 244,583 $ 24,911 $ 308 $ 269,802
Schedule of Estimated Annual Amortization Expense	The following table presents the estimated amortization expense with respect to CDI for the periods indicated (in thousands): Estimated Amortization Remainder of 2017 $ 1,542 2018 5,609 2019 4,889 2020 4,169 2021 3,448 Thereafter 5,254 $ 24,911
Schedule of Servicing Assets at Amortized Value	An analysis of our mortgage servicing rights for the three and nine months ended September 30, 2017 and 2016 is presented below (in thousands): Three Months Ended Nine Months Ended 2017 2016 2017 2016 Balance, beginning of the period $ 14,985 $ 14,276 $ 15,249 $ 13,354 Additions—amounts capitalized 826 1,652 2,477 4,371 Amortization (1) (1,057 ) (1,102 ) (2,972 ) (2,899 ) Balance, end of the period (2) $ 14,754 $ 14,826 $ 14,754 $ 14,826 (1) Amortization of mortgage servicing rights is recorded as a reduction of loan servicing income and any unamortized balance is fully amortized if the loan repays in full. (2) There was no valuation allowance as of September 30, 2017 and 2016 .

DEPOSITS (Tables)

DEPOSITS (Tables)	9 Months Ended
	Sep. 30, 2017
Banking and Thrift [Abstract]
Schedule of Deposit Liabilities	Deposits consisted of the following at September 30, 2017 and December 31, 2016 (in thousands): September 30, 2017 December 31, 2016 Non-interest-bearing accounts $ 3,379,841 $ 3,140,451 Interest-bearing checking 955,486 914,484 Regular savings accounts 1,577,292 1,523,391 Money market accounts 1,525,657 1,497,755 Total interest-bearing transaction and saving accounts 4,058,435 3,935,630 Certificates of deposit: Certificates of deposit less than or equal to $250,000 945,161 884,403 Certificates of deposit greater than $250,000 155,413 160,930 Total certificates of deposit (1) 1,100,574 1,045,333 Total deposits $ 8,538,850 $ 8,121,414 Included in total deposits: Public fund transaction and savings accounts $ 194,519 $ 221,765 Public fund interest-bearing certificates 26,543 25,650 Total public deposits $ 221,062 $ 247,415 Total brokered deposits $ 171,718 $ 34,074 (1) Certificates of deposit include $30,000 and $426,000 of acquisition premiums at September 30, 2017 and December 31, 2016 , respectively.
Maturities of Certificates of Deposit	Scheduled maturities and weighted average interest rates of certificate accounts at September 30, 2017 are as follows (dollars in thousands): September 30, 2017 Amount Weighted Average Rate Maturing in one year or less $ 808,770 0.51 % Maturing after one year through two years 107,060 0.69 Maturing after two years through three years 137,253 1.26 Maturing after three years through four years 27,870 1.08 Maturing after four years through five years 17,208 1.21 Maturing after five years 2,413 1.05 Total certificates of deposit $ 1,100,574 0.65 %

FAIR VALUE OF FINANCIAL INSTR29

FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Schedule of Fair Value of Financial Instruments, by Balance Sheet Grouping	The following table presents estimated fair values of the Company’s financial instruments as of September 30, 2017 and December 31, 2016 , whether or not measured at fair value in the Consolidated Statements of Financial Condition (in thousands): September 30, 2017 December 31, 2016 Level Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value Assets: Cash and cash equivalents 1 $ 241,766 $ 241,766 $ 247,719 $ 247,719 Securities—trading 2,3 23,466 23,466 24,568 24,568 Securities—available-for-sale 2 1,339,057 1,339,057 800,917 800,917 Securities—held-to-maturity 2,3 264,752 268,663 267,873 270,528 Loans held for sale 2 71,905 72,018 246,353 246,815 Loans receivable 3 7,774,449 7,666,707 7,451,148 7,337,608 FHLB stock 3 20,854 20,854 12,506 12,506 Bank-owned life insurance 1 161,648 161,648 158,936 158,936 Mortgage servicing rights 3 14,754 18,312 15,249 16,740 Derivatives: Interest rate swaps 2 7,186 7,186 8,330 8,330 Interest rate lock and forward sales commitments 2 664 664 482 482 Liabilities: Demand, interest checking and money market accounts 2 5,860,984 5,860,984 5,552,690 5,552,690 Regular savings 2 1,577,292 1,577,292 1,523,391 1,523,391 Certificates of deposit 2 1,100,574 1,082,829 1,045,333 1,028,866 FHLB advances 2 263,349 263,349 54,216 54,216 Other borrowings 2 103,713 103,713 105,685 105,685 Junior subordinated debentures 3 97,280 97,280 95,200 95,200 Derivatives: Interest rate swaps 2 7,186 7,186 8,330 8,330 Interest rate lock and forward sales commitments 2 115 115 289 289
Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis	The following tables present financial assets and liabilities measured at fair value on a recurring basis and the level within the fair value hierarchy of the fair value measurements for those assets and liabilities as of September 30, 2017 and December 31, 2016 (in thousands): September 30, 2017 Level 1 Level 2 Level 3 Total Assets: Securities—trading U.S. Government and agency obligations $ — $ 1,305 $ — $ 1,305 Municipal bonds — 331 — 331 Corporate bonds (Trust Preferred Securities) — — 21,675 21,675 Equity securities — 155 — 155 — 1,791 21,675 23,466 Securities—available-for-sale U.S. Government and agency obligations — 87,585 — 87,585 Municipal bonds — 114,646 — 114,646 Corporate bonds — 10,602 — 10,602 Mortgage-backed or related securities — 1,092,432 — 1,092,432 Asset-backed securities — 28,207 — 28,207 Equity securities — 5,585 — 5,585 — 1,339,057 — 1,339,057 Loans held for sale — 64,399 — 64,399 Derivatives Interest rate swaps — 7,186 — 7,186 Interest rate lock and forward sales commitments — 664 — 664 $ — $ 1,413,097 $ 21,675 $ 1,434,772 Liabilities: Advances from FHLB $ — $ 263,349 $ — $ 263,349 Junior subordinated debentures, net of unamortized deferred issuance costs — — 97,280 97,280 Derivatives Interest rate swaps — 7,186 — 7,186 Interest rate lock and forward sales commitments — 115 — 115 $ — $ 270,650 $ 97,280 $ 367,930 December 31, 2016 Level 1 Level 2 Level 3 Total Assets: Securities—trading U.S. Government and agency obligations $ — $ 1,326 $ — $ 1,326 Municipal bonds — 335 — 335 Corporate Bonds (Trust Preferred Securities) — — 21,143 21,143 Mortgage-backed securities — 1,641 — 1,641 Equity securities — 123 — 123 — 3,425 21,143 24,568 Securities—available-for-sale U.S. Government and agency obligations — 56,978 — 56,978 Municipal bonds — 109,853 — 109,853 Corporate bonds — 10,283 — 10,283 Mortgage-backed securities — 594,712 — 594,712 Asset-backed securities — 28,993 — 28,993 Equity securities — 98 — 98 — 800,917 — 800,917 Loans held for sale — 9,600 — 9,600 Derivatives Interest rate swaps — 8,330 — 8,330 Interest rate lock and forward sales commitments — 482 — 482 $ — $ 822,754 $ 21,143 $ 843,897 Liabilities: Advances from FHLB $ — $ 54,216 $ — $ 54,216 Junior subordinated debentures, net of unamortized deferred issuance costs — — 95,200 95,200 Derivatives Interest rate swaps — 8,330 — 8,330 Interest rate lock and forward sales commitments — 289 — 289 $ — $ 62,835 $ 95,200 $ 158,035
Schedule of Valuation Technique, Unobservable Input, and Qualitative Information for Unobservable Inputs	The following table provides a description of the valuation technique, unobservable inputs, and qualitative information about the unobservable inputs for certain of the Company's assets and liabilities classified as Level 3 and measured at fair value on a recurring and non-recurring basis at September 30, 2017 and December 31, 2016 : Weighted Average Rate / Range Financial Instruments Valuation Techniques Unobservable Inputs September 30, 2017 December 31, 2016 Corporate Bonds (TPS securities) Discounted cash flows Discount rate 6.33 % 6.00 % Junior subordinated debentures Discounted cash flows Discount rate 6.33 % 6.00 % Impaired loans Collateral Valuations Discount to appraised value 8.5% to 9.0% n/a REO Appraisals Discount to appraised value 17.0% to 42.0% 0% to 45%
Schedule of Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation	The following tables provide a reconciliation of the assets and liabilities measured at fair value using significant unobservable inputs (Level 3) on a recurring basis during the three and nine months ended September 30, 2017 and 2016 (in thousands): Three Months Ended Nine Months Ended September 30, 2017 September 30, 2017 Level 3 Fair Value Inputs Level 3 Fair Value Inputs TPS Securities Borrowings—Junior Subordinated Debentures TPS Securities Borrowings— Junior Subordinated Debentures Beginning balance $ 21,568 $ 96,852 $ 21,143 $ 95,200 Total gains or losses recognized Assets gains 107 — 532 — Liabilities losses — 428 — 2,080 Ending balance at September 30, 2017 $ 21,675 $ 97,280 $ 21,675 $ 97,280 Three Months Ended Nine Months Ended September 30, 2016 September 30, 2016 Level 3 Fair Value Inputs Level 3 Fair Value Inputs TPS Securities Borrowings—Junior Subordinated Debentures TPS Securities Borrowings— Junior Subordinated Debentures Beginning balance $ 20,645 $ 93,298 $ 18,699 $ 92,480 Total gains or losses recognized Assets gains 280 — 501 — Liabilities losses — 1,066 — 1,884 Purchases, issuances and settlements, including acquisitions — — 1,725 — Ending balance at September 30, 2016 $ 20,925 $ 94,364 $ 20,925 $ 94,364
Schedule of Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis	The following tables present financial assets measured at fair value on a non-recurring basis and the level within the fair value hierarchy of the fair value measurements for those assets as of September 30, 2017 and December 31, 2016 (in thousands): September 30, 2017 Level 1 Level 2 Level 3 Total Impaired loans $ — $ 7,494 $ — $ 7,494 REO — — 1,496 1,496 December 31, 2016 Level 1 Level 2 Level 3 Total REO $ — $ — $ 11,081 $ 11,081 The following table presents the losses resulting from non-recurring fair value adjustments for the three and nine months ended September 30, 2017 and 2016 (in thousands): Three months ended September 30, Nine months ended September 30, 2017 2016 2017 2016 Impaired loans $ (1,584 ) $ (128 ) $ (2,059 ) $ (182 ) REO — (168 ) (256 ) (599 ) Total loss from non-recurring measurements $ (1,584 ) $ (296 ) $ (2,315 ) $ (781 )

INCOME TAXES AND DEFERRED TAX30

INCOME TAXES AND DEFERRED TAXES INCOME TAXES AND DEFERRED TAXES (Tables)	9 Months Ended
	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Expense (Benefit)	The following table presents the balances of the Company’s tax credit investments and related unfunded commitments at September 30, 2017 and December 31, 2016 (in thousands): September 30, 2017 December 31, 2016 Tax credit investments $ 4,058 $ 4,654 Unfunded commitments—tax credit investments $ 638 $ 665 The following table presents other information related to the Company's tax credit investments for the three and nine months ended September 30, 2017 and 2016 (in thousands): Three Months Ended Nine Months Ended 2017 2016 2017 2016 Tax credits and other tax benefits recognized $ 285 $ 284 $ 855 $ 852 Tax credit amortization expense included in provision for income taxes $ 199 $ 168 597 504

CALCULATION OF WEIGHTED AVERA31

CALCULATION OF WEIGHTED AVERAGE SHARES OUTSTANDING FOR EARNINGS PER SHARE (EPS) (Tables)	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Schedule of Basic and Diluted Weighted Shares Outstanding	The following table reconciles basic to diluted weighted shares outstanding used to calculate earnings per share data (in thousands, except shares and per share data): Three Months Ended Nine Months Ended 2017 2016 2017 2016 Net income $ 25,077 $ 23,851 $ 74,324 $ 62,581 Basic weighted average shares outstanding 32,982,532 34,045,225 32,966,214 34,050,459 Plus unvested restricted stock 96,567 79,386 94,958 54,416 Diluted weighted shares outstanding 33,079,099 34,124,611 33,061,172 34,104,875 Earnings per common share Basic $ 0.76 $ 0.70 $ 2.25 $ 1.84 Diluted $ 0.76 $ 0.70 $ 2.25 $ 1.83

COMMITMENTS AND CONTINGENCIES (

COMMITMENTS AND CONTINGENCIES (Tables)	9 Months Ended
	Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Schedule of Financial Instruments With Off-Balance-Sheet Risks	Outstanding commitments for which no asset or liability for the notional amount has been recorded consisted of the following at the dates indicated (in thousands): Contract or Notional Amount September 30, 2017 December 31, 2016 Commitments to extend credit $ 2,339,558 $ 2,204,795 Standby letters of credit and financial guarantees 15,432 17,694 Commitments to originate loans 64,263 69,833 Risk participation agreement 11,516 7,488 Derivatives also included in Note 13: Commitments to originate loans held for sale 68,976 69,487 Commitments to sell loans secured by one- to four-family residential properties 39,848 36,907 Commitments to sell securities related to mortgage banking activities 100,500 44,000

DERIVATIVES AND HEDGING (Tables

DERIVATIVES AND HEDGING (Tables)	9 Months Ended
	Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivatives Designated in Hedge Relationships	As of September 30, 2017 and December 31, 2016 , the notional values or contractual amounts and fair values of the Company's derivatives designated in hedge relationships were as follows (in thousands): Asset Derivatives Liability Derivatives September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 Notional/ Contract Amount Fair Value (1) Notional/ Contract Amount Fair Value (1) Notional/ Contract Amount Fair Value (2) Notional/ Contract Amount Fair Value (2) Interest rate swaps $ 4,441 $ 531 $ 5,855 $ 660 $ 4,441 $ 531 $ 5,855 $ 660 (1) Included in Loans receivable on the Consolidated Statements of Financial Condition. (2) Included in Other liabilities on the Consolidated Statements of Financial Condition.
Schedule of Derivatives Not Designated in Hedge Relationships	As of September 30, 2017 and December 31, 2016 , the notional values or contractual amounts and fair values of the Company's derivatives not designated in hedge relationships were as follows (in thousands): Asset Derivatives Liability Derivatives September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 Notional/ Contract Amount Fair Value (1) Notional/ Contract Amount Fair Value (1) Notional/ Contract Amount Fair Value (2) Notional/ Contract Amount Fair Value (2) Interest rate swaps $ 303,500 $ 6,655 $ 309,936 $ 7,670 $ 303,500 $ 6,655 $ 309,936 $ 7,670 Mortgage loan commitments 46,351 265 42,296 30 22,625 115 27,191 174 Forward sales contracts 140,348 399 71,192 452 — — 9,715 115 $ 490,199 $ 7,319 $ 423,424 $ 8,152 $ 326,125 $ 6,770 $ 346,842 $ 7,959 (1) Included in Other assets on the Consolidated Statements of Financial Condition, with the exception of certain interest swaps and mortgage loan commitments (with a fair value of $216,000 at September 30, 2017 and $822,000 at December 31, 2016 ), which are included in Loans receivable. (2) Included in Other liabilities on the Consolidated Statements of Financial Condition. Gains (losses) recognized in income on derivatives not designated in hedge relationships for the three and nine months ended September 30, 2017 and 2016 were as follows (in thousands): Location on Consolidated Statements of Operations Three Months Ended Nine Months Ended 2017 2016 2017 2016 Mortgage loan commitments Mortgage banking operations $ 50 $ (376 ) $ 235 $ 516 Forward sales contracts Mortgage banking operations (398 ) 315 (654 ) (297 ) $ (348 ) $ (61 ) $ (419 ) $ 219
Offsetting Assets and Liabilities	The following tables illustrate the potential effect of the Company's derivative master netting arrangements, by type of financial instrument, on the Company's Consolidated Statements of Financial Condition as of September 30, 2017 and December 31, 2016 (in thousands): September 30, 2017 Gross Amounts of Financial Instruments Not Offset in the Consolidated Statements of Financial Condition Gross Amounts Recognized Amounts offset in the Statement of Financial Condition Net Amounts in the Statement of Financial Condition Netting Adjustment Per Applicable Master Netting Agreements Fair Value of Financial Collateral in the Statement of Financial Condition Net Amount Derivative assets Interest rate swaps $ 7,186 $ — $ 7,186 $ (1,148 ) $ — $ 6,038 $ 7,186 $ — $ 7,186 $ (1,148 ) $ — $ 6,038 Derivative liabilities Interest rate swaps $ 7,186 $ — $ 7,186 $ (1,148 ) $ (4,461 ) $ 1,577 $ 7,186 $ — $ 7,186 $ (1,148 ) $ (4,461 ) $ 1,577 December 31, 2016 Gross Amounts of Financial Instruments Not Offset in the Consolidated Statements of Financial Condition Gross Amounts Recognized Amounts offset in the Statement of Financial Condition Net Amounts in the Statement of Financial Condition Netting Adjustment Per Applicable Master Netting Agreements Fair Value of Financial Collateral in the Statement of Financial Condition Net Amount Derivative assets Interest rate swaps $ 8,330 $ — $ 8,330 $ (362 ) $ — $ 7,968 $ 8,330 $ — $ 8,330 $ (362 ) $ — $ 7,968 Derivative liabilities Interest rate swaps $ 8,330 $ — $ 8,330 $ (362 ) $ (7,557 ) $ 411 $ 8,330 $ — $ 8,330 $ (362 ) $ (7,557 ) $ 411

ACCOUNTING STANDARDS RECENTLY34

ACCOUNTING STANDARDS RECENTLY ISSUED OR ADOPTED Available for sale securities - equity securities (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Securities—available-for-sale	$ 1,339,057	$ 800,917
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities—available-for-sale	$ 5,585	$ 98

SECURITIES (Schedule of Securit

SECURITIES (Schedule of Securities) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Securities [Line Items]
Securities—trading, Amortized Cost	$ 28,663	$ 30,154
Securities—trading	23,466	24,568
Available-for-sale Securities, Amortized Cost	1,338,863	806,336
Available-for-sale Securities, Gross Unrealized Gains	5,922	2,752
Available-for-sale Securities, Gross Unrealized Losses	(5,728)	(8,171)
Securities—available-for-sale	1,339,057	800,917
Held-to-maturity Securities, Amortized Cost	264,752	267,873
Held-to-maturity Securities, Gross Unrealized Gains	5,138	4,482
Held-to-maturity Securities, Gross Unrealized Losses	1,227	1,827
Securities—held-to-maturity	268,663	270,528
U.S. Government and agency obligations [Member]
Schedule of Securities [Line Items]
Securities—trading, Amortized Cost	1,230	1,230
Securities—trading	1,305	1,326
Available-for-sale Securities, Amortized Cost	87,509	57,288
Available-for-sale Securities, Gross Unrealized Gains	379	146
Available-for-sale Securities, Gross Unrealized Losses	(303)	(456)
Securities—available-for-sale	87,585	56,978
Held-to-maturity Securities, Amortized Cost	1,035	1,065
Held-to-maturity Securities, Gross Unrealized Gains	24	0
Held-to-maturity Securities, Gross Unrealized Losses	0	18
Securities—held-to-maturity	1,059	1,047
Municipal bonds [Member]
Schedule of Securities [Line Items]
Securities—trading, Amortized Cost	330	331
Securities—trading	331	335
Available-for-sale Securities, Amortized Cost	113,794	110,487
Available-for-sale Securities, Gross Unrealized Gains	1,194	455
Available-for-sale Securities, Gross Unrealized Losses	(342)	(1,089)
Securities—available-for-sale	114,646	109,853
Held-to-maturity Securities, Amortized Cost	193,987	196,989
Held-to-maturity Securities, Gross Unrealized Gains	4,638	4,173
Held-to-maturity Securities, Gross Unrealized Losses	1,015	1,272
Securities—held-to-maturity	197,610	199,890
Corporate bonds [Member]
Schedule of Securities [Line Items]
Securities—trading, Amortized Cost	27,089	26,959
Securities—trading	21,675	21,143
Available-for-sale Securities, Amortized Cost	10,567	10,255
Available-for-sale Securities, Gross Unrealized Gains	79	77
Available-for-sale Securities, Gross Unrealized Losses	(44)	(49)
Securities—available-for-sale	10,602	10,283
Held-to-maturity Securities, Amortized Cost	4,265	3,876
Held-to-maturity Securities, Gross Unrealized Gains	0	0
Held-to-maturity Securities, Gross Unrealized Losses	0	0
Securities—held-to-maturity	4,265	3,876
Mortgage-backed or related securities [Member]
Schedule of Securities [Line Items]
Securities—trading, Amortized Cost		1,620
Securities—trading		1,641
Available-for-sale Securities, Amortized Cost	1,093,203	598,899
Available-for-sale Securities, Gross Unrealized Gains	4,103	2,064
Available-for-sale Securities, Gross Unrealized Losses	(4,874)	(6,251)
Securities—available-for-sale	1,092,432	594,712
Held-to-maturity Securities, Amortized Cost	65,465	65,943
Held-to-maturity Securities, Gross Unrealized Gains	476	309
Held-to-maturity Securities, Gross Unrealized Losses	212	537
Securities—held-to-maturity	65,729	65,715
Asset-backed Securities [Member]
Schedule of Securities [Line Items]
Available-for-sale Securities, Amortized Cost	28,104	29,319
Available-for-sale Securities, Gross Unrealized Gains	157	0
Available-for-sale Securities, Gross Unrealized Losses	(54)	(326)
Securities—available-for-sale	28,207	28,993
Equity Securities [Member]
Schedule of Securities [Line Items]
Securities—trading, Amortized Cost	14	14
Securities—trading	155	123
Available-for-sale Securities, Amortized Cost	5,686	88
Available-for-sale Securities, Gross Unrealized Gains	10	10
Available-for-sale Securities, Gross Unrealized Losses	(111)	0
Securities—available-for-sale	$ 5,585	$ 98

SECURITIES (Securities with Con

SECURITIES (Securities with Continuous Loss Position) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Held-to-maturity Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 526,094	$ 518,373
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(4,038)	(7,283)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	118,568	68,099
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(1,690)	(888)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	644,662	586,472
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(5,728)	(8,171)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	59,119	108,094
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1,115	1,822
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	4,347	204
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(112)	(5)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	63,466	108,298
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss	1,227	1,827
U.S. Government and agency obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	39,846	39,043
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(286)	(442)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	5,680	1,012
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(17)	(14)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	45,526	40,055
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(303)	(456)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value		1,047
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		18
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value		0
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value		1,047
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss		18
Municipal bonds [Member]
Schedule of Held-to-maturity Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	32,559	60,765
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(169)	(1,087)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	13,023	556
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(173)	(2)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	45,582	61,321
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(342)	(1,089)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	40,230	64,802
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	903	1,267
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	4,347	204
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(112)	(5)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	44,577	65,006
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss	1,015	1,272
Corporate bonds [Member]
Schedule of Held-to-maturity Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	300	5,206
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(1)	(49)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	4,814	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(43)	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	5,114	5,206
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(44)	(49)
Mortgage-backed or related securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	437,934	403,431
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(3,417)	(5,604)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	95,051	47,467
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(1,457)	(647)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	532,985	450,898
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(4,874)	(6,251)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	18,889	42,245
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	212	537
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	0	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	18,889	42,245
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss	212	537
Asset-backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	9,968	9,928
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(54)	(101)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	0	19,064
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	(225)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	9,968	28,992
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(54)	$ (326)
Equity Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	5,487
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(111)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	5,487
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ (111)

SECURITIES (Securities Debt Mat

SECURITIES (Securities Debt Maturities) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Trading Securities, Amortized Cost, Maturing in one year or less	$ 130
Trading Securities, Amortized Cost, Maturing after one year through five years	230
Trading Securities, Amortized Cost, Maturing after five years through ten years	1,200
Trading Securities, Amortized Cost, Maturing after ten years through twenty years	17,089
Trading Securities, Amortized Cost, Maturing after twenty years	10,000
Trading Securities, Amortized Cost, Total with contractual maturity	28,649
Trading Securities, Amortized Cost, Equity securities	14
Trading Securities, Amortized Cost	28,663	$ 30,154
Trading Securities, Fair Value, Maturing in one year or less	131
Trading Securities, Fair Value, Maturing after one year through five years	231
Trading Securities, Fair Value, Maturing after five years through ten years	1,274
Trading Securities, Fair Value, Maturing after ten years through twenty years	14,248
Trading Securities, Fair Value, Maturing after twenty years	7,427
Trading Securities, Fair Value, Total with contractual maturity	23,311
Trading Securities, Fair Value, Equity securities	155
Trading Securities, Fair Value	23,466	24,568
Available-for-sale Securities, Amortized Cost, Maturing in one year or less	26,951
Available-for-sale Securities, Amortized Cost, Maturing after one year through five years	110,023
Available-for-sale Securities, Amortized Cost, Maturing after five years through ten years	265,137
Available-for-sale Securities, Amortized Cost, Maturing after ten years through twenty years	255,076
Available-for-sale Securities, Amortized Cost, Maturing after twenty years	675,990
Available-for-sale Securities, Amortized Cost, Total with contractual maturity	1,333,177
Available-for-sale Securities, Amortized Cost, Equity securities	5,686
Available-for-sale Securities, Amortized Cost	1,338,863	806,336
Available-for-sale Securities, Fair Value, Maturing in one year or less	26,911
Available-for-sale Securities, Fair Value, Maturing after one year through five years	110,293
Available-for-sale Securities, Fair Value, Maturing after five years through ten years	264,366
Available-for-sale Securities, Fair Value, Maturing after ten years through twenty years	256,319
Available-for-sale Securities, Fair Value, Maturing after twenty years	675,583
Available-for-sale Securities, Fair Value, Total with contractual maturity	1,333,472
Available-for-sale Securities, Fair Value, Equity securities	5,585
Available-for-sale Securities, Fair Value	1,339,057	800,917
Held-to-maturity Securities, Amortized Cost, Maturing in one year or less	1,226
Held-to-maturity Securities, Amortized Cost, Maturing after one year through five years	24,269
Held-to-maturity Securities, Amortized Cost, Maturing after five years through ten years	108,739
Held-to-maturity Securities, Amortized Cost, Maturing after ten years through twenty years	88,407
Held-to-maturity Securities, Amortized Cost, Maturing after twenty years	42,111
Held-to-maturity Securities, Amortized Cost	264,752	267,873
Held-to-maturity Securities, Fair Value, Maturing in one year or less	1,226
Held-to-maturity Securities, Fair Value, Maturing after one year through five years	24,432
Held-to-maturity Securities, Fair Value, Maturing after five years through ten years	110,368
Held-to-maturity Securities, Fair Value, Maturing after ten years through twenty years	91,280
Held-to-maturity Securities, Fair Value, Maturing after twenty years	41,357
Held-to-maturity Securities, Fair Value	$ 268,663	$ 270,528

SECURITIES (Securities Pledged)

SECURITIES (Securities Pledged) (Details) $ in Thousands	Sep. 30, 2017USD ($)
Pledged Financial Instruments, Not Separately Reported, Securities [Abstract]
Securities pledged for State and Local Government Public Deposits, Carrying Value	$ 127,661
Securities pledged for Interest Rate Swap Counterparties, Carrying Value	16,172
Securities pledged for Repurchase Agreements, Carrying Value	127,632
Pledged Financial Instruments, Not Separately Reported, Interest-bearing Deposits for Other Debt Facilities	3,949
Total pledged securities, Carrying Value	275,414
Securities pledged for State and Local Government public deposits, Amortized Cost	127,549
Securities pledged for Interest Rate Swap Counterparties, Amortized Cost	16,197
Securities pledged for Repurchase Agreements, Amortized Cost	127,803
Pledged Financial Instruments, Not Separately Reported, Interest-bearing Deposits for Other Debt Facilities, Amortized Cost	3,948
Total pledged securities, Amortized Cost	275,497
Securities pledged for State and Local Government Public Deposits, Fair Value	130,380
Securities pledged for Interest Rate Swap Counterparties, Fair Value	16,218
Securities pledged for Retail Repurchase Agreements, Fair Value	127,797
Pledged Financial Instruments, Not Separately Reported, Interest-bearing Deposits for Other Debt Facilities, Fair Value	3,888
Total pledged securities, Fair Value	$ 278,283

SECURITIES (Textual) (Details)

SECURITIES (Textual) (Details)	9 Months Ended
	Sep. 30, 2017USD ($)security	Sep. 30, 2016USD ($)security	Dec. 31, 2016security
Trading Securities [Abstract]
Trading Securities, Sale Proceeds	$ 0	$ 1,682,000
Trading Securities, Realized Gain (Loss)	0	156,000
Trading Securities, OTTI (Recovery) Charges	$ 0	$ 0
Trading Securities, Number of Securities on Nonaccrual Status | security	0	0
Trading Securities, Unrealized Holding Gain	$ 389,000
Available-for-sale Securities [Abstract]
Available-for-sale Securities, Number of Securities in Unrealized Loss Position | security	221		243
Available-for-sale Securities, Sale Proceeds	$ 35,600,000	$ 233,300,000
Available-for-sale Securities, Gross Realized Gain (Loss)	230,000	374,000
Available-for-sale Securities, OTTI Charges	$ 0	$ 0
Available-for-sale Securities, Number of Securities in Nonaccrual Status | security	0	0
Held-to-maturity Securities [Abstract]
Held-to-maturity Securities, Number of Securities in Unrealized Loss Position | security	31		73
Held-to-maturity Securities, Number of Securities Sold | security	0	0
Held-to-maturity Securities, Sale Proceeds	$ 0
Held-to-maturity Securities, OTTI Charges	$ 0	$ 0
Held-to-maturity Securities, Number of Securities in Nonaccrual Status | security	0	0

LOANS RECEIVABLE AND THE ALLO40

LOANS RECEIVABLE AND THE ALLOWANCE FOR LOAN LOSSES (Loans by Type) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Mar. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 7,774,449		$ 7,451,148	$ 7,398,637
Allowance for loan losses	89,100	$ 88,586	85,997	84,220	$ 81,318	$ 78,008
Net loans	$ 7,685,349		$ 7,365,151
Percent of total loans	100.00%		100.00%
Unearned loan fees in excess of unamortized costs	$ 389		$ (5,800)
Discount on acquired loans, net	23,400		31,100
Commerical real estate - owner-occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 1,369,130		$ 1,352,999
Percent of total loans	17.60%		18.10%
Commercial real estate - investment properties [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 1,993,144		$ 1,986,336
Percent of total loans	25.60%		26.70%
Multifamily real estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 311,706		$ 248,150	266,883
Allowance for loan losses	$ 1,625	1,562	$ 1,360	1,436	1,515	4,195
Percent of total loans	4.00%		3.30%
Commercial construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 157,041		$ 124,068
Percent of total loans	2.00%		1.70%
Multifamily construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 136,532		$ 124,126
Percent of total loans	1.80%		1.70%
One- to four-family construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 399,361		$ 375,704
Percent of total loans	5.10%		5.00%
Land and land development - residential [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 158,384		$ 170,004
Percent of total loans	2.00%		2.30%
Land and land development - commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 27,095		$ 29,184
Percent of total loans	0.40%		0.40%
Commercial business [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 1,311,409		$ 1,207,879	1,187,848
Allowance for loan losses	$ 18,657	19,126	$ 16,533	16,507	17,758	13,856
Percent of total loans	16.90%		16.20%
Agricultural business, including secured by farmland [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 339,932		$ 369,156	383,275
Allowance for loan losses	$ 3,949	3,808	$ 2,967	2,833	2,891	3,645
Percent of total loans	4.40%		5.00%
One- to four-family residential [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 869,556		$ 813,077	846,899
Allowance for loan losses	$ 2,040	$ 2,010	$ 2,238	$ 2,190	$ 2,204	$ 4,732
Percent of total loans	11.20%		10.90%
Consumer secured by one- to four-family [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 535,300		$ 493,211
Percent of total loans	6.90%		6.60%
Consumer - other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 165,859		$ 157,254
Percent of total loans	2.10%		2.10%

LOANS RECEIVABLE AND THE ALLO41

LOANS RECEIVABLE AND THE ALLOWANCE FOR LOAN LOSSES (Purchased Credit-Impaired Loans, Changes in Accretable Yield) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Receivables [Abstract]
Outstanding contractual unpaid balance of purchased credit-impaired loans	$ 34,900		$ 34,900		$ 48,400
Carrying balance of purchased credit-impaired loans	23,221	$ 38,674	23,221	$ 38,674	32,322
Accretable Yield Movement Schedule [Roll Forward]
Balance, beginning of period	7,666	11,035	8,717	10,375
Accretion to interest income	(1,720)	(1,811)	(5,210)	(6,349)
Disposals	0	(899)	(497)	(1,018)
Reclassifications from non-accretable difference	918	1,120	3,854	6,437
Balance, end of period	6,864	$ 9,445	6,864	$ 9,445
Non-accretable difference	$ 11,700		$ 11,700		$ 15,700

LOANS RECEIVABLE AND THE ALLO42

LOANS RECEIVABLE AND THE ALLOWANCE FOR LOAN LOSSES (Impaired Loans With and Without Specific Reserves) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance		$ 45,994		$ 45,994		$ 43,935
Recorded Investment, Without Allowance	[1]	32,003		32,003		25,357
Recorded Investment, With Allowance	[2]	10,795		10,795		16,129
Related Allowance		773		773		1,420
Average Recorded Investment		39,615	$ 49,891	37,741	$ 51,065
Interest Income Recognized		198	288	656	816
Commerical real estate - owner-occupied [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance		8,250		8,250		3,786
Recorded Investment, Without Allowance	[1]	7,438		7,438		3,373
Recorded Investment, With Allowance	[2]	200		200		203
Related Allowance		19		19		20
Average Recorded Investment		3,657	2,544	3,079	2,673
Interest Income Recognized		3	3	7	9
Commercial real estate - investment properties [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance		7,657		7,657		9,916
Recorded Investment, Without Allowance	[1]	4,247		4,247		5,565
Recorded Investment, With Allowance	[2]	3,208		3,208		4,304
Related Allowance		245		245		408
Average Recorded Investment		8,849	19,046	8,393	19,775
Interest Income Recognized		37	74	124	224
Multifamily real estate [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance						508
Recorded Investment, Without Allowance	[1]					147
Recorded Investment, With Allowance	[2]					349
Related Allowance						64
Average Recorded Investment		115	529	335	518
Interest Income Recognized		1	27	10	36
One- to four-family construction [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance						1,180
Recorded Investment, Without Allowance	[1]					0
Recorded Investment, With Allowance	[2]					1,180
Related Allowance						156
Average Recorded Investment		0	1,176	524	1,151
Interest Income Recognized		0	3	27	56
Land and land development - residential [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance		1,322		1,322		3,012
Recorded Investment, Without Allowance	[1]	798		798		750
Recorded Investment, With Allowance	[2]	193		193		1,106
Related Allowance		66		66		219
Average Recorded Investment		1,095	1,964	1,574	1,971
Interest Income Recognized		6	20	42	63
Land and land development - commercial [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance		1,538		1,538		1,608
Recorded Investment, Without Allowance	[1]	928		928		998
Recorded Investment, With Allowance	[2]	0		0		0
Related Allowance		0		0		0
Average Recorded Investment		928	997	950	1,005
Interest Income Recognized		0	0	0	0
Commercial business [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance		7,945		7,945		3,753
Recorded Investment, Without Allowance	[1]	7,195		7,195		3,074
Recorded Investment, With Allowance	[2]	573		573		651
Related Allowance		52		52		69
Average Recorded Investment		8,128	4,283	5,838	4,470
Interest Income Recognized		6	16	63	28
Agricultural business, including secured by farmland [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance		8,579		8,579		6,438
Recorded Investment, Without Allowance	[1]	6,956		6,956		6,354
Recorded Investment, With Allowance	[2]	500		500		0
Related Allowance		196		196		0
Average Recorded Investment		6,196	4,973	5,605	4,824
Interest Income Recognized		69	6	131	19
One- to four-family residential [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance		8,858		8,858		11,439
Recorded Investment, Without Allowance	[1]	2,878		2,878		3,149
Recorded Investment, With Allowance	[2]	5,904		5,904		8,026
Related Allowance		184		184		479
Average Recorded Investment		8,899	11,973	9,602	12,193
Interest Income Recognized		73	131	240	358
Consumer secured by one- to four-family [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance		1,698		1,698		1,904
Recorded Investment, Without Allowance	[1]	1,492		1,492		1,721
Recorded Investment, With Allowance	[2]	140		140		144
Related Allowance		7		7		1
Average Recorded Investment		1,608	1,894	1,647	1,913
Interest Income Recognized		2	5	7	13
Consumer - other [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance		147		147		391
Recorded Investment, Without Allowance	[1]	71		71		226
Recorded Investment, With Allowance	[2]	77		77		166
Related Allowance		4		4		$ 4
Average Recorded Investment		140	512	194	572
Interest Income Recognized		$ 1	$ 3	$ 5	$ 10
[1]	Includes loans without an allowance reserve that have been individually evaluated for impairment and that evaluation concluded that no reserve was needed and $9.3 million and $10.0 million of homogenous and small balance loans as of September 30, 2017 and December 31, 2016, respectively, that are collectively evaluated for impairment for which a general reserve has been established.
[2]	Loans with a specific allowance reserve have been individually evaluated for impairment using either a discounted cash flow analysis or, for collateral dependent loans, current appraisals less costs to sell to establish realizable value.

LOANS RECEIVABLE AND THE ALLO43

LOANS RECEIVABLE AND THE ALLOWANCE FOR LOAN LOSSES (Troubled Debt Restructuring) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Modifications [Line Items]
TDRs on Accrual Status	$ 12,744	$ 18,907
TDRs on Nonaccrual Status	929	1,024
Total TDRs	13,673	19,931
Commitments to advance funds related to TDRs, maximum additional amounts	59	127
Commerical real estate - owner-occupied [Member]
Financing Receivable, Modifications [Line Items]
TDRs on Accrual Status	200	203
TDRs on Nonaccrual Status	89	96
Total TDRs	289	299
Commercial real estate - investment properties [Member]
Financing Receivable, Modifications [Line Items]
TDRs on Accrual Status	3,207	4,304
TDRs on Nonaccrual Status	0	0
Total TDRs	3,207	4,304
Multifamily real estate [Member]
Financing Receivable, Modifications [Line Items]
TDRs on Accrual Status	0	349
TDRs on Nonaccrual Status	0	0
Total TDRs	0	349
One- to four-family construction [Member]
Financing Receivable, Modifications [Line Items]
TDRs on Accrual Status	0	1,180
TDRs on Nonaccrual Status	0	0
Total TDRs	0	1,180
Land and land development - residential [Member]
Financing Receivable, Modifications [Line Items]
TDRs on Accrual Status	193	1,106
TDRs on Nonaccrual Status	0	0
Total TDRs	193	1,106
Commercial business [Member]
Financing Receivable, Modifications [Line Items]
TDRs on Accrual Status	573	653
TDRs on Nonaccrual Status	0	0
Total TDRs	573	653
Agricultural business, including secured by farmland [Member]
Financing Receivable, Modifications [Line Items]
TDRs on Accrual Status	3,172	3,125
TDRs on Nonaccrual Status	29	79
Total TDRs	3,201	3,204
One- to four-family residential [Member]
Financing Receivable, Modifications [Line Items]
TDRs on Accrual Status	5,182	7,678
TDRs on Nonaccrual Status	810	843
Total TDRs	5,992	8,521
Consumer secured by one- to four-family [Member]
Financing Receivable, Modifications [Line Items]
TDRs on Accrual Status	140	143
TDRs on Nonaccrual Status	1	6
Total TDRs	141	149
Consumer - other [Member]
Financing Receivable, Modifications [Line Items]
TDRs on Accrual Status	77	166
TDRs on Nonaccrual Status	0	0
Total TDRs	$ 77	$ 166

LOANS RECEIVABLE AND THE ALLO44

LOANS RECEIVABLE AND THE ALLOWANCE FOR LOAN LOSSES (Newly Restructured Loans) (Details)	3 Months Ended
	Sep. 30, 2016contract
Financing Receivable, Modifications [Line Items]
Number of Contracts	0

LOANS RECEIVABLE AND THE ALLO45

LOANS RECEIVABLE AND THE ALLOWANCE FOR LOAN LOSSES LOANS RECEIVABLE AND THE ALLOWANCE FOR LOAN LOSSES (Troubled Debt Restructuring Which Incurred Payment Default) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
TDRs Which Incurred a Payment Default	$ 0	$ 0

LOANS RECEIVABLE AND THE ALLO46

LOANS RECEIVABLE AND THE ALLOWANCE FOR LOAN LOSSES (Risk-Rated and Non-Risk Rated Loans by Grade and Other Characteristic) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	$ 7,774,449	$ 7,451,148	$ 7,398,637
Owner-occupied Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	1,369,130	1,352,999
Commercial real estate - investment properties [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	1,993,144	1,986,336
Multifamily real estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	311,706	248,150	266,883
Commercial construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	157,041	124,068
Multifamily construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	136,532	124,126
One- to four-family construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	399,361	375,704
Land and land development - residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	158,384	170,004
Land and land development - commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	27,095	29,184
Commercial business [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	1,311,409	1,207,879	1,187,848
Agricultural Business/Farmland [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	339,932	369,156	383,275
One- to four-family [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	869,556	813,077	$ 846,899
Consumer secured by one- to four-family [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	535,300	493,211
Consumer Borrower [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	165,859	157,254
Pass (Risk Ratings 1-5) [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	7,612,423	7,282,408
Pass (Risk Ratings 1-5) [Member] | Owner-occupied Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	1,339,550	1,313,142
Pass (Risk Ratings 1-5) [Member] | Commercial real estate - investment properties [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	1,978,603	1,948,822
Pass (Risk Ratings 1-5) [Member] | Multifamily real estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	310,936	247,258
Pass (Risk Ratings 1-5) [Member] | Commercial construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	157,041	124,068
Pass (Risk Ratings 1-5) [Member] | Multifamily construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	136,532	124,126
Pass (Risk Ratings 1-5) [Member] | One- to four-family construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	397,135	371,636
Pass (Risk Ratings 1-5) [Member] | Land and land development - residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	147,874	167,764
Pass (Risk Ratings 1-5) [Member] | Land and land development - commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	23,202	25,090
Pass (Risk Ratings 1-5) [Member] | Commercial business [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	1,241,338	1,148,585
Pass (Risk Ratings 1-5) [Member] | Small Credit-Scored Business Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	296,000	225,000
Pass (Risk Ratings 1-5) [Member] | Agricultural Business/Farmland [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	317,808	356,656
Pass (Risk Ratings 1-5) [Member] | One- to four-family [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	864,053	807,837
Pass (Risk Ratings 1-5) [Member] | Consumer secured by one- to four-family [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	532,907	490,877
Pass (Risk Ratings 1-5) [Member] | Consumer Borrower [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	165,444	156,547
Special mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	37,120	77,691
Special mention [Member] | Owner-occupied Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	996	14,394
Special mention [Member] | Commercial real estate - investment properties [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	3,601	23,846
Special mention [Member] | Multifamily real estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Special mention [Member] | Commercial construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Special mention [Member] | Multifamily construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Special mention [Member] | One- to four-family construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Special mention [Member] | Land and land development - residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	9,374	0
Special mention [Member] | Land and land development - commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Special mention [Member] | Commercial business [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	19,068	35,036
Special mention [Member] | Agricultural Business/Farmland [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	3,390	3,335
Special mention [Member] | One- to four-family [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	674	967
Special mention [Member] | Consumer secured by one- to four-family [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	5
Special mention [Member] | Consumer Borrower [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	17	108
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	124,906	91,042
Substandard [Member] | Owner-occupied Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	28,584	25,463
Substandard [Member] | Commercial real estate - investment properties [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	10,940	13,668
Substandard [Member] | Multifamily real estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	770	892
Substandard [Member] | Commercial construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Substandard [Member] | Multifamily construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Substandard [Member] | One- to four-family construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	2,226	4,068
Substandard [Member] | Land and land development - residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	1,136	2,240
Substandard [Member] | Land and land development - commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	3,893	4,094
Substandard [Member] | Commercial business [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	51,003	24,258
Substandard [Member] | Agricultural Business/Farmland [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	18,734	9,165
Substandard [Member] | One- to four-family [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	4,829	4,273
Substandard [Member] | Consumer secured by one- to four-family [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	2,393	2,327
Substandard [Member] | Consumer Borrower [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	398	594
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	7
Doubtful [Member] | Owner-occupied Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Doubtful [Member] | Commercial real estate - investment properties [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Doubtful [Member] | Multifamily real estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Doubtful [Member] | Commercial construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Doubtful [Member] | Multifamily construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Doubtful [Member] | One- to four-family construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Doubtful [Member] | Land and land development - residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Doubtful [Member] | Land and land development - commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Doubtful [Member] | Commercial business [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Doubtful [Member] | Agricultural Business/Farmland [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Doubtful [Member] | One- to four-family [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Doubtful [Member] | Consumer secured by one- to four-family [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	2
Doubtful [Member] | Consumer Borrower [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	5
Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Loss [Member] | Owner-occupied Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Loss [Member] | Commercial real estate - investment properties [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Loss [Member] | Multifamily real estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Loss [Member] | Commercial construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Loss [Member] | Multifamily construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Loss [Member] | One- to four-family construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Loss [Member] | Land and land development - residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Loss [Member] | Land and land development - commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Loss [Member] | Commercial business [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Loss [Member] | Agricultural Business/Farmland [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Loss [Member] | One- to four-family [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Loss [Member] | Consumer secured by one- to four-family [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Loss [Member] | Consumer Borrower [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	$ 0	$ 0

LOANS RECEIVABLE AND THE ALLO47

LOANS RECEIVABLE AND THE ALLOWANCE FOR LOAN LOSSES (Age Analysis of Company's Past Due Loans) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	$ 31,895	$ 28,859
Purchased Credit-Impaired	23,221	32,322	$ 38,674
Current	7,719,333	7,389,967
Total loans	7,774,449	7,451,148	7,398,637
Loans 90 days or more past due and still accruing	927	2,153
Nonaccrual loans	29,127	20,426
Commerical real estate - owner-occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	6,930	4,476
Purchased Credit-Impaired	7,896	13,281
Current	1,354,304	1,335,242
Total loans	1,369,130	1,352,999
Loans 90 days or more past due and still accruing	0	0
Nonaccrual loans	7,438	3,373
Commercial real estate - investment properties [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	4,136	5,564
Purchased Credit-Impaired	7,788	10,168
Current	1,981,220	1,970,604
Total loans	1,993,144	1,986,336
Loans 90 days or more past due and still accruing	53	701
Nonaccrual loans	4,194	4,864
Multifamily real estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,101	147
Purchased Credit-Impaired	173	139	258
Current	310,432	247,864
Total loans	311,706	248,150	266,883
Loans 90 days or more past due and still accruing	0	147
Nonaccrual loans	0	0
Commercial construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	223	0
Purchased Credit-Impaired	0	0
Current	156,818	124,068
Total loans	157,041	124,068
Loans 90 days or more past due and still accruing	0	0
Nonaccrual loans	0	0
Multifamily construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Purchased Credit-Impaired	0	0
Current	136,532	124,126
Total loans	136,532	124,126
Loans 90 days or more past due and still accruing	0	0
Nonaccrual loans	0	0
One- to four-family construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Purchased Credit-Impaired	794	862
Current	398,567	374,842
Total loans	399,361	375,704
Loans 90 days or more past due and still accruing	0	0
Nonaccrual loans	0	0
Land and land development - residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,617	798
Purchased Credit-Impaired	0	0
Current	156,767	169,206
Total loans	158,384	170,004
Loans 90 days or more past due and still accruing	0	0
Nonaccrual loans	798	750
Land and land development - commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	928	998
Purchased Credit-Impaired	2,965	3,016
Current	23,202	25,170
Total loans	27,095	29,184
Loans 90 days or more past due and still accruing	0	0
Nonaccrual loans	928	998
Commercial business [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	7,275	4,552
Purchased Credit-Impaired	2,608	3,821	4,264
Current	1,301,526	1,199,506
Total loans	1,311,409	1,207,879	1,187,848
Loans 90 days or more past due and still accruing	51	0
Nonaccrual loans	7,144	3,074
Agricultural business, including secured by farmland [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	3,381	4,372
Purchased Credit-Impaired	683	684	807
Current	335,868	364,100
Total loans	339,932	369,156	383,275
Loans 90 days or more past due and still accruing	0	0
Nonaccrual loans	4,285	3,229
One- to four-family residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	3,270	4,152
Purchased Credit-Impaired	265	274	301
Current	866,021	808,651
Total loans	869,556	813,077	$ 846,899
Loans 90 days or more past due and still accruing	722	1,233
Nonaccrual loans	2,878	2,263
Consumer secured by one- to four-family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	2,545	2,078
Purchased Credit-Impaired	5	18
Current	532,750	491,115
Total loans	535,300	493,211
Loans 90 days or more past due and still accruing	76	61
Nonaccrual loans	1,416	1,660
Consumer - other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	489	1,722
Purchased Credit-Impaired	44	59
Current	165,326	155,473
Total loans	165,859	157,254
Loans 90 days or more past due and still accruing	25	11
Nonaccrual loans	46	215
30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	7,578	8,923
30 to 59 Days Past Due [Member] | Commerical real estate - owner-occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	414	1,938
30 to 59 Days Past Due [Member] | Commercial real estate - investment properties [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	117
30 to 59 Days Past Due [Member] | Multifamily real estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,101	0
30 to 59 Days Past Due [Member] | Commercial construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	223	0
30 to 59 Days Past Due [Member] | Multifamily construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
30 to 59 Days Past Due [Member] | One- to four-family construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
30 to 59 Days Past Due [Member] | Land and land development - residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	819	48
30 to 59 Days Past Due [Member] | Land and land development - commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
30 to 59 Days Past Due [Member] | Commercial business [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,712	2,314
30 to 59 Days Past Due [Member] | Agricultural business, including secured by farmland [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,051	360
30 to 59 Days Past Due [Member] | One- to four-family residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	431	1,793
30 to 59 Days Past Due [Member] | Consumer secured by one- to four-family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,537	932
30 to 59 Days Past Due [Member] | Consumer - other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	290	1,421
60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	4,548	2,454
60 to 89 Days Past Due [Member] | Commerical real estate - owner-occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	3,156	0
60 to 89 Days Past Due [Member] | Commercial real estate - investment properties [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
60 to 89 Days Past Due [Member] | Multifamily real estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
60 to 89 Days Past Due [Member] | Commercial construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
60 to 89 Days Past Due [Member] | Multifamily construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
60 to 89 Days Past Due [Member] | One- to four-family construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
60 to 89 Days Past Due [Member] | Land and land development - residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
60 to 89 Days Past Due [Member] | Land and land development - commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
60 to 89 Days Past Due [Member] | Commercial business [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	371	647
60 to 89 Days Past Due [Member] | Agricultural business, including secured by farmland [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	1,244
60 to 89 Days Past Due [Member] | One- to four-family residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	628	249
60 to 89 Days Past Due [Member] | Consumer secured by one- to four-family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	220	160
60 to 89 Days Past Due [Member] | Consumer - other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	173	154
90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	19,769	17,482
90 Days or More Past Due [Member] | Commerical real estate - owner-occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	3,360	2,538
90 Days or More Past Due [Member] | Commercial real estate - investment properties [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	4,136	5,447
90 Days or More Past Due [Member] | Multifamily real estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	147
90 Days or More Past Due [Member] | Commercial construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
90 Days or More Past Due [Member] | Multifamily construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
90 Days or More Past Due [Member] | One- to four-family construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
90 Days or More Past Due [Member] | Land and land development - residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	798	750
90 Days or More Past Due [Member] | Land and land development - commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	928	998
90 Days or More Past Due [Member] | Commercial business [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	5,192	1,591
90 Days or More Past Due [Member] | Agricultural business, including secured by farmland [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	2,330	2,768
90 Days or More Past Due [Member] | One- to four-family residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	2,211	2,110
90 Days or More Past Due [Member] | Consumer secured by one- to four-family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	788	986
90 Days or More Past Due [Member] | Consumer - other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	$ 26	$ 147

LOANS RECEIVABLE AND THE ALLO48

LOANS RECEIVABLE AND THE ALLOWANCE FOR LOAN LOSSES (Allowance 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	Sep. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Mar. 31, 2016
Financing Receivable, Allowance for Loan Losses [Roll Forward]
Allowance for loan losses, Beginning balance			$ 85,997	$ 78,008
Provision for loan losses	$ 2,000	$ 2,000	6,000	4,000
Recoveries	776	1,557	3,153	4,761
Charge-offs	(2,262)	(655)	(6,050)	(2,549)
Allowance for loan losses, Ending balance	89,100	84,220	89,100	84,220
Financing Receivable, Allowance for Loan Losses, Additional Information [Abstract]
Allowance individually evaluated for impairment					$ 773			$ 1,809
Allowance collectively evaluated for impairment					88,320			82,378
Allowance for purchased credit-impaired loans					7			33
Total allowance for loan losses	89,100	84,220	85,997	78,008	89,100	$ 88,586	$ 85,997	84,220	$ 81,318
Loans individually evaluated for impairment					33,531			34,487
Loans collectively evaluated for impairment					7,717,697			7,325,476
Purchased Credit-Impaired					23,221		32,322	38,674
Total loans					7,774,449		7,451,148	7,398,637
Commercial real estate [Member]
Financing Receivable, Allowance for Loan Losses [Roll Forward]
Allowance for loan losses, Beginning balance			20,993	20,716
Provision for loan losses	(236)	(337)	2,716	(788)
Recoveries	19	34	353	98
Charge-offs	(584)	0	(631)	(180)
Allowance for loan losses, Ending balance	23,431	19,846	23,431	19,846
Financing Receivable, Allowance for Loan Losses, Additional Information [Abstract]
Allowance individually evaluated for impairment					263			832
Allowance collectively evaluated for impairment					23,168			19,014
Allowance for purchased credit-impaired loans					0			0
Total allowance for loan losses	23,431	19,846	20,993	20,716	23,431	24,232	20,993	19,846	20,149
Loans individually evaluated for impairment					13,866			16,630
Loans collectively evaluated for impairment					3,332,724			3,214,042
Purchased Credit-Impaired					15,684			28,544
Total loans					3,362,274			3,259,216
Multifamily real estate [Member]
Financing Receivable, Allowance for Loan Losses [Roll Forward]
Allowance for loan losses, Beginning balance			1,360	4,195
Provision for loan losses	63	(79)	254	(2,759)
Recoveries	0	0	11	0
Charge-offs	0	0	0	0
Allowance for loan losses, Ending balance	1,625	1,436	1,625	1,436
Financing Receivable, Allowance for Loan Losses, Additional Information [Abstract]
Allowance individually evaluated for impairment					0			65
Allowance collectively evaluated for impairment					1,625			1,371
Allowance for purchased credit-impaired loans					0			0
Total allowance for loan losses	1,625	1,436	1,360	4,195	1,625	1,562	1,360	1,436	1,515
Loans individually evaluated for impairment					0			351
Loans collectively evaluated for impairment					311,533			266,274
Purchased Credit-Impaired					173		139	258
Total loans					311,706		248,150	266,883
Construction and Land [Member]
Financing Receivable, Allowance for Loan Losses [Roll Forward]
Allowance for loan losses, Beginning balance			34,252	27,131
Provision for loan losses	2,037	1,269	(6,010)	5,404
Recoveries	73	673	1,180	1,268
Charge-offs	0	0	0	0
Allowance for loan losses, Ending balance	29,422	33,803	29,422	33,803
Financing Receivable, Allowance for Loan Losses, Additional Information [Abstract]
Allowance individually evaluated for impairment					67			396
Allowance collectively evaluated for impairment					29,348			33,374
Allowance for purchased credit-impaired loans					7			33
Total allowance for loan losses	29,422	33,803	34,252	27,131	29,422	27,312	34,252	33,803	31,861
Loans individually evaluated for impairment					1,871			4,137
Loans collectively evaluated for impairment					872,783			789,037
Purchased Credit-Impaired					3,759			4,153
Total loans					878,413			797,327
Commercial business [Member]
Financing Receivable, Allowance for Loan Losses [Roll Forward]
Allowance for loan losses, Beginning balance			16,533	13,856
Provision for loan losses	(555)	(1,351)	4,489	1,519
Recoveries	577	433	921	1,775
Charge-offs	(491)	(333)	(3,286)	(643)
Allowance for loan losses, Ending balance	18,657	16,507	18,657	16,507
Financing Receivable, Allowance for Loan Losses, Additional Information [Abstract]
Allowance individually evaluated for impairment					52			54
Allowance collectively evaluated for impairment					18,605			16,453
Allowance for purchased credit-impaired loans					0			0
Total allowance for loan losses	18,657	16,507	16,533	13,856	18,657	19,126	16,533	16,507	17,758
Loans individually evaluated for impairment					5,899			2,026
Loans collectively evaluated for impairment					1,302,902			1,181,558
Purchased Credit-Impaired					2,608		3,821	4,264
Total loans					1,311,409		1,207,879	1,187,848
Agricultural Business/Farmland [Member]
Financing Receivable, Allowance for Loan Losses [Roll Forward]
Allowance for loan losses, Beginning balance			2,967	3,645
Provision for loan losses	1,141	80	2,113	(284)
Recoveries	1	(138)	133	39
Charge-offs	(1,001)	0	(1,264)	(567)
Allowance for loan losses, Ending balance	3,949	2,833	3,949	2,833
Financing Receivable, Allowance for Loan Losses, Additional Information [Abstract]
Allowance individually evaluated for impairment					196			0
Allowance collectively evaluated for impairment					3,753			2,833
Allowance for purchased credit-impaired loans					0			0
Total allowance for loan losses	3,949	2,833	2,967	3,645	3,949	3,808	2,967	2,833	2,891
Loans individually evaluated for impairment					6,495			2,758
Loans collectively evaluated for impairment					332,754			379,710
Purchased Credit-Impaired					683		684	807
Total loans					339,932		369,156	383,275
One- to four-family [Member]
Financing Receivable, Allowance for Loan Losses [Roll Forward]
Allowance for loan losses, Beginning balance			2,238	4,732
Provision for loan losses	22	(404)	(460)	(3,468)
Recoveries	8	482	262	1,052
Charge-offs	0	(92)	0	(126)
Allowance for loan losses, Ending balance	2,040	2,190	2,040	2,190
Financing Receivable, Allowance for Loan Losses, Additional Information [Abstract]
Allowance individually evaluated for impairment					184			456
Allowance collectively evaluated for impairment					1,856			1,734
Allowance for purchased credit-impaired loans					0			0
Total allowance for loan losses	2,040	2,190	2,238	4,732	2,040	2,010	2,238	2,190	2,204
Loans individually evaluated for impairment					5,182			8,270
Loans collectively evaluated for impairment					864,109			838,328
Purchased Credit-Impaired					265		274	301
Total loans					869,556		813,077	846,899
Consumer [Member]
Financing Receivable, Allowance for Loan Losses [Roll Forward]
Allowance for loan losses, Beginning balance			4,104	902
Provision for loan losses	117	348	488	3,536
Recoveries	98	73	293	529
Charge-offs	(186)	(230)	(869)	(1,033)
Allowance for loan losses, Ending balance	4,016	3,934	4,016	3,934
Financing Receivable, Allowance for Loan Losses, Additional Information [Abstract]
Allowance individually evaluated for impairment					11			6
Allowance collectively evaluated for impairment					4,005			3,928
Allowance for purchased credit-impaired loans					0			0
Total allowance for loan losses	4,016	3,934	4,104	902	4,016	3,987	4,104	3,934	3,743
Loans individually evaluated for impairment					218			315
Loans collectively evaluated for impairment					700,892			656,527
Purchased Credit-Impaired					49			347
Total loans					701,159			657,189
Unallocated Financing Receivables [Member]
Financing Receivable, Allowance for Loan Losses [Roll Forward]
Allowance for loan losses, Beginning balance			3,550	2,831
Provision for loan losses	(589)	2,474	2,410	840
Recoveries	0	0	0	0
Charge-offs	0	0	0	0
Allowance for loan losses, Ending balance	5,960	3,671	5,960	3,671
Financing Receivable, Allowance for Loan Losses, Additional Information [Abstract]
Allowance individually evaluated for impairment					0			0
Allowance collectively evaluated for impairment					5,960			3,671
Allowance for purchased credit-impaired loans					0			0
Total allowance for loan losses	$ 5,960	$ 3,671	$ 3,550	$ 2,831	5,960	$ 6,549	$ 3,550	3,671	$ 1,197
Loans individually evaluated for impairment					0			0
Loans collectively evaluated for impairment					0			0
Purchased Credit-Impaired					0			0
Total loans					$ 0			$ 0

REAL ESTATE OWNED, NET (REO Rol

REAL ESTATE OWNED, NET (REO Rollforward) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Real Estate Owned [Roll Forward]
Balance, beginning of the period	$ 2,427	$ 6,147	$ 11,081	$ 11,627
Additions from loan foreclosures	0	156	46	534
Additions from acquisitions	0	0	0	400
Real Estate Owned, Acquisitions Through Capitalized Costs	0	0	54	0
Proceeds from dispositions of REO	(961)	(1,699)	(11,382)	(8,021)
Gain on sale of REO	30	281	1,953	981
Valuation adjustments in the period	0	(168)	(256)	(804)
Balance, end of the period	$ 1,496	$ 4,717	$ 1,496	$ 4,717

REAL ESTATE OWNED, NET REAL EST

REAL ESTATE OWNED, NET REAL ESTATE OWNED, NET (Textual) (Details) - USD ($)	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
Real Estate Owned [Line Items]
Real Estate Owned	$ 1,496,000	$ 2,427,000	$ 11,081,000	$ 4,717,000	$ 6,147,000	$ 11,627,000
Mortgage Loans in Process of Foreclosure, Amount	2,000,000		715,000
One- to four-family residential [Member]
Real Estate Owned [Line Items]
Real Estate Owned	$ 0		$ 917,000

GOODWILL, OTHER INTANGIBLE AS51

GOODWILL, OTHER INTANGIBLE ASSETS AND MORTGAGE SERVICING RIGHTS (Finite-Lived Intangible Assets) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Finite-lived Intangible Assets [Roll Forward]
Goodwill, beginning of period	$ 244,583	$ 247,738
Goodwill and other intangibles, net, beginning of period	274,745	285,210
Amortization	(4,943)	(7,310)
Goodwill, Purchase Accounting Adjustments		3,155
Goodwill, end of period	244,583	244,583
Goodwill and other intangibles, net, end of period	269,802	274,745
Core Deposit Intangibles [Member]
Finite-lived Intangible Assets [Roll Forward]
Finite lived assets Balance, beginning of period	29,701	36,762
Amortization	(4,790)	(7,061)
Finite lived assets Balance, end of period	24,911	29,701
Leasehold Improvements [Member]
Finite-lived Intangible Assets [Roll Forward]
Finite lived assets Balance, beginning of period	461	710
Amortization	(153)	(249)
Finite lived assets Balance, end of period	$ 308	$ 461

GOODWILL, OTHER INTANGIBLE AS52

GOODWILL, OTHER INTANGIBLE ASSETS AND MORTGAGE SERVICING RIGHTS (Estimated Annual Amortization Expense) (Details) - Core Deposit Intangibles [Member] - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Remainder of 2017	$ 1,542
2,018	5,609
2,019	4,889
2,020	4,169
2,021	3,448
Thereafter	5,254
Finite lived assets, net	$ 24,911	$ 29,701	$ 36,762

GOODWILL, OTHER INTANGIBLE AS53

GOODWILL, OTHER INTANGIBLE ASSETS AND MORTGAGE SERVICING RIGHTS (Mortgage Servicing Rights) (Details) - Mortgage Servicing Rights [Member] - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Morgage Servicing Rights at Amortized Value [Line Items]
Loans Serviced For Others		$ 2,130,000		$ 2,130,000		$ 2,050,000
Custodial Accounts		22,500		22,500		$ 10,300
Servicing Asset at Amortized Value, Balance [Roll Forward]
Balance, net of valuation allowance, beginning of the period		14,985	$ 14,276	15,249	$ 13,354
Additions—amounts capitalized		826	1,652	2,477	4,371
Amortization	[1]	(1,057)	(1,102)	(2,972)	(2,899)
Balance, net of valuation allowance, end of the period	[2]	14,754	$ 14,826	14,754	$ 14,826
Valuation allowance, end of period	[2]	$ 0		$ 0
[1]	Amortization of mortgage servicing rights is recorded as a reduction of loan servicing income and any unamortized balance is fully amortized if the loan repays in full.
[2]	There was no valuation allowance as of September 30, 2017 and 2016.

DEPOSITS (Deposit Liabilities)

DEPOSITS (Deposit Liabilities) (Details) - USD ($)		Sep. 30, 2017	Dec. 31, 2016
Deposits:
Non-interest-bearing accounts		$ 3,379,841,000	$ 3,140,451,000
Interest-bearing checking		955,486,000	914,484,000
Regular savings accounts		1,577,292,000	1,523,391,000
Money market accounts		1,525,657,000	1,497,755,000
Total interest-bearing transaction and saving accounts		4,058,435,000	3,935,630,000
Certificates of deposit less than or equal to $250,000		945,161,000	884,403,000
Certificates of deposit greater than $250,000		155,413,000	160,930,000
Total certificates of deposit	[1]	1,100,574,000	1,045,333,000
Total deposits		8,538,850,000	8,121,414,000
Included in total deposits:
Public fund transaction and savings accounts		194,519,000	221,765,000
Public fund interest-bearing certificates		26,543,000	25,650,000
Total public deposits		221,062,000	247,415,000
Total brokered deposits		171,718,000	34,074,000
CD acquisition premium		$ 30,000	$ 426,000
[1]	Certificates of deposit include $30,000 and $426,000 of acquisition premiums at September 30, 2017 and December 31, 2016, respectively.

DEPOSITS DEPOSITS (Maturities a

DEPOSITS DEPOSITS (Maturities and Weighted Average Interest Rates of Certificates of Deposit) (Details) - USD ($) $ in Thousands		Sep. 30, 2017	Dec. 31, 2016
Maturities of Time Deposits [Abstract]
Maturing in one year or less		$ 808,770
Maturing after one year through two years		107,060
Maturing after two years through three years		137,253
Maturing after three years through four years		27,870
Maturing after four years through five years		17,208
Maturing after five years		2,413
Total certificates of deposit	[1]	$ 1,100,574	$ 1,045,333
Weighted Average Rate [Abstract]
Maturing in one year or less		0.51%
Maturing after one year through two years		0.69%
Maturing after two years through three years		1.26%
Maturing after three years through four years		1.08%
Maturing after four years through five years		1.21%
Maturing after five years		1.05%
Total certificates of deposit		0.65%
[1]	Certificates of deposit include $30,000 and $426,000 of acquisition premiums at September 30, 2017 and December 31, 2016, respectively.

DEPOSITS DEPOSITS (Textual) (De

DEPOSITS DEPOSITS (Textual) (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Banking and Thrift [Abstract]
Time Deposits, at or Above FDIC Insurance Limit	$ 159.9	$ 165.4

FAIR VALUE OF FINANCIAL INSTR57

FAIR VALUE OF FINANCIAL INSTRUMENTS (Fair Value By Balance Sheet Location) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Assets:
Securities—trading	$ 23,466	$ 24,568
Securities—available-for-sale	1,339,057	800,917
Securities—held-to-maturity	268,663	270,528
Liabilities:
FHLB advances at fair value	263,349	54,216
Carrying Value
Assets:
Cash and cash equivalents	241,766	247,719
Securities—trading	23,466	24,568
Securities—available-for-sale	1,339,057	800,917
Securities—held-to-maturity	264,752	267,873
Loans receivable held for sale	71,905	246,353
Loans receivable	7,774,449	7,451,148
FHLB stock	20,854	12,506
Bank-owned life insurance	161,648	158,936
Mortgage servicing rights	14,754	15,249
Liabilities:
Demand, interest checking and money market accounts	5,860,984	5,552,690
Regular savings	1,577,292	1,523,391
Certificates of deposit	1,100,574	1,045,333
FHLB advances at fair value	263,349	54,216
Other borrowings	103,713	105,685
Junior subordinated debentures at fair value	97,280	95,200
Estimated Fair Value
Assets:
Cash and cash equivalents	241,766	247,719
Securities—trading	23,466	24,568
Securities—available-for-sale	1,339,057	800,917
Securities—held-to-maturity	268,663	270,528
Loans receivable held for sale	72,018	246,815
Loans receivable	7,666,707	7,337,608
FHLB stock	20,854	12,506
Bank-owned life insurance	161,648	158,936
Mortgage servicing rights	18,312	16,740
Liabilities:
Demand, interest checking and money market accounts	5,860,984	5,552,690
Regular savings	1,577,292	1,523,391
Certificates of deposit	1,082,829	1,028,866
FHLB advances at fair value	263,349	54,216
Other borrowings	103,713	105,685
Junior subordinated debentures at fair value	97,280	95,200
Interest rate swaps [Member] | Carrying Value
Assets:
Derivatives:	7,186	8,330
Liabilities:
Derivatives:	7,186	8,330
Interest rate swaps [Member] | Estimated Fair Value
Assets:
Derivatives:	7,186	8,330
Liabilities:
Derivatives:	7,186	8,330
Interest Rate Forward Sales Commitments [Member] | Carrying Value
Assets:
Derivatives:	664	482
Liabilities:
Derivatives:	115	289
Interest Rate Forward Sales Commitments [Member] | Estimated Fair Value
Assets:
Derivatives:	664	482
Liabilities:
Derivatives:	$ 115	$ 289

FAIR VALUE OF FINANCIAL INSTR58

FAIR VALUE OF FINANCIAL INSTRUMENTS (Assets and Liabilities Measured on a 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]
Securities—trading	$ 23,466	$ 24,568
Securities—available-for-sale	1,339,057	800,917
Advances from FHLB at fair value	263,349	54,216
Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities—trading	23,466	24,568
Securities—available-for-sale	1,339,057	800,917
Total assets	1,434,772	843,897
Advances from FHLB at fair value	263,349	54,216
Junior subordinated debentures net of unamortized deferred issuance costs at fair value	97,280	95,200
Total liabilities	367,930	158,035
Recurring [Member] | Interest rate lock and forward sale commitments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	664	8,330
Derivative liabilities	115	8,330
Recurring [Member] | Interest rate swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	7,186	482
Derivative liabilities	7,186	289
Recurring [Member] | U.S. Government and agency obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities—trading	1,305	1,326
Securities—available-for-sale	87,585	56,978
Recurring [Member] | Municipal bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities—trading	331	335
Securities—available-for-sale	114,646	109,853
Recurring [Member] | Corporate bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities—available-for-sale	10,602	10,283
Recurring [Member] | TPS and TRUP CDOs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities—trading	21,675	21,143
Recurring [Member] | Mortgage-backed securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities—trading		1,641
Securities—available-for-sale	1,092,432	594,712
Recurring [Member] | Asset-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities—available-for-sale	28,207	28,993
Recurring [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities—trading	155	123
Securities—available-for-sale	5,585	98
Recurring [Member] | Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale, Fair Value Disclosure	64,399	9,600
Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities—trading	0	0
Securities—available-for-sale	0	0
Total assets	0	0
Advances from FHLB at fair value	0	0
Junior subordinated debentures net of unamortized deferred issuance costs at fair value	0	0
Total liabilities	0	0
Recurring [Member] | Level 1 [Member] | Interest rate lock and forward sale commitments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0	0
Derivative liabilities	0	0
Recurring [Member] | Level 1 [Member] | Interest rate swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0	0
Derivative liabilities	0	0
Recurring [Member] | Level 1 [Member] | U.S. Government and agency obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities—trading	0	0
Securities—available-for-sale	0	0
Recurring [Member] | Level 1 [Member] | Municipal bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities—trading	0	0
Securities—available-for-sale	0	0
Recurring [Member] | Level 1 [Member] | Corporate bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities—available-for-sale	0	0
Recurring [Member] | Level 1 [Member] | TPS and TRUP CDOs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities—trading	0	0
Recurring [Member] | Level 1 [Member] | Mortgage-backed securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities—trading		0
Securities—available-for-sale	0	0
Recurring [Member] | Level 1 [Member] | Asset-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities—available-for-sale	0	0
Recurring [Member] | Level 1 [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities—trading	0	0
Securities—available-for-sale	0	0
Recurring [Member] | Level 1 [Member] | Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale, Fair Value Disclosure	0	0
Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities—trading	1,791	3,425
Securities—available-for-sale	1,339,057	800,917
Total assets	1,413,097	822,754
Advances from FHLB at fair value	263,349	54,216
Junior subordinated debentures net of unamortized deferred issuance costs at fair value	0	0
Total liabilities	270,650	62,835
Recurring [Member] | Level 2 [Member] | Interest rate lock and forward sale commitments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	664	8,330
Derivative liabilities	115	8,330
Recurring [Member] | Level 2 [Member] | Interest rate swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	7,186	482
Derivative liabilities	7,186	289
Recurring [Member] | Level 2 [Member] | U.S. Government and agency obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities—trading	1,305	1,326
Securities—available-for-sale	87,585	56,978
Recurring [Member] | Level 2 [Member] | Municipal bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities—trading	331	335
Securities—available-for-sale	114,646	109,853
Recurring [Member] | Level 2 [Member] | Corporate bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities—available-for-sale	10,602	10,283
Recurring [Member] | Level 2 [Member] | TPS and TRUP CDOs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities—trading	0	0
Recurring [Member] | Level 2 [Member] | Mortgage-backed securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities—trading		1,641
Securities—available-for-sale	1,092,432	594,712
Recurring [Member] | Level 2 [Member] | Asset-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities—available-for-sale	28,207	28,993
Recurring [Member] | Level 2 [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities—trading	155	123
Securities—available-for-sale	5,585	98
Recurring [Member] | Level 2 [Member] | Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale, Fair Value Disclosure	64,399	9,600
Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities—trading	21,675	21,143
Securities—available-for-sale	0	0
Total assets	21,675	21,143
Advances from FHLB at fair value	0	0
Junior subordinated debentures net of unamortized deferred issuance costs at fair value	97,280	95,200
Total liabilities	97,280	95,200
Recurring [Member] | Level 3 [Member] | Interest rate lock and forward sale commitments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0	0
Derivative liabilities	0	0
Recurring [Member] | Level 3 [Member] | Interest rate swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0	0
Derivative liabilities	0	0
Recurring [Member] | Level 3 [Member] | U.S. Government and agency obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities—trading	0	0
Securities—available-for-sale	0	0
Recurring [Member] | Level 3 [Member] | Municipal bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities—trading	0	0
Securities—available-for-sale	0	0
Recurring [Member] | Level 3 [Member] | Corporate bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities—available-for-sale	0	0
Recurring [Member] | Level 3 [Member] | TPS and TRUP CDOs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities—trading	21,675	21,143
Recurring [Member] | Level 3 [Member] | Mortgage-backed securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities—trading		0
Securities—available-for-sale	0	0
Recurring [Member] | Level 3 [Member] | Asset-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities—available-for-sale	0	0
Recurring [Member] | Level 3 [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities—trading	0	0
Securities—available-for-sale	0	0
Recurring [Member] | Level 3 [Member] | Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale, Fair Value Disclosure	$ 0	$ 0

FAIR VALUE OF FINANCIAL INSTR59

FAIR VALUE OF FINANCIAL INSTRUMENTS (Valuation Technique) (Details) - Level 3 [Member]	3 Months Ended		9 Months Ended	12 Months Ended
	Sep. 30, 2016	Mar. 31, 2015	Sep. 30, 2017	Dec. 31, 2016
Junior Subordinated Debt [Member] | Discounted cash flows [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate, Description of Variable Rate Basis	three-month LIBOR
Fair Value Inputs, Discount Rate, Basis Spread on Variable Rate Basis	5.00%
Junior Subordinated Debt [Member] | Weighted Average [Member] | Discounted cash flows [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Discount rate			6.33%	6.00%
Corporate Bonds (TPS securities) [Member] | Weighted Average [Member] | Discounted cash flows [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Discount rate			6.33%	6.00%
Impaired Loans [Member] | Weighted Average [Member] | discount to appraised value [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
fair value inputs, discount to appraised value			8.5% to 9.0%
Impaired Loans [Member] | Minimum [Member] | Market Approach Valuation Technique [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Discount rate			0.00%
Impaired Loans [Member] | Maximum [Member] | Market Approach Valuation Technique [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Discount rate			0.00%
Real Estate Owned [Member] | Weighted Average [Member] | discount to appraised value [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
fair value inputs, discount to appraised value				0% to 45%
Real Estate Owned [Member] | Minimum [Member] | Discounted cash flows [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Discount rate			17.00%	0.00%
Real Estate Owned [Member] | Maximum [Member] | Discounted cash flows [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Discount rate			42.00%	45.00%

FAIR VALUE OF FINANCIAL INSTR60

FAIR VALUE OF FINANCIAL INSTRUMENTS (Unobservable Inputs Reconciliation) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Junior Subordinated Debt [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 96,852	$ 93,298	$ 95,200	$ 92,480
Liabilities (gains) losses	428	1,066	2,080	1,884
Purchases, issuances and settlements, including acquisitions		0		0
Ending balance	97,280	94,364	97,280	94,364
TPS Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	21,568	20,645
Assets gains (losses), including OTTI	107	280
Purchases, issuances and settlements, including acquisitions		0
Ending balance	21,675	20,925	21,675	20,925
TPS and TRUP CDOs [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance			21,143	18,699
Assets gains (losses), including OTTI			532	501
Purchases, issuances and settlements, including acquisitions				1,725
Ending balance	$ 21,675	$ 20,925	$ 21,675	$ 20,925

FAIR VALUE OF FINANCIAL INSTR61

FAIR VALUE OF FINANCIAL INSTRUMENTS (Assets Measured on Nonrecurring Basis) (Details) - Nonrecurring [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ (7,494)		$ (7,494)
REO	1,496		1,496		$ 11,081
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0		0
REO	0		0		0
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	(7,494)		(7,494)
REO	0		0		0
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0		0
REO	1,496		1,496		$ 11,081
Gains (losses) resulting from nonrecurring fair value adjustments	(1,584)	$ (296)	(2,315)	$ (781)
Impaired Loans [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gains (losses) resulting from nonrecurring fair value adjustments	(1,584)	(128)	(2,059)	(182)
Real Estate [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gains (losses) resulting from nonrecurring fair value adjustments	$ 0	$ (168)	$ (256)	$ (599)

INCOME TAXES AND DEFERRED TAX62

INCOME TAXES AND DEFERRED TAXES INCOME TAXES AND DEFERRED TAXES (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Tax credit investments	$ 4,058		$ 4,058		$ 4,654
Unfunded commitments—tax credit investments	638		638		$ 665
Tax credits and other tax benefits recognized	285	$ 284	855	$ 852
Tax credit amortization expense included in provision for income taxes	$ 199	$ 168	$ 597	$ 504

CALCULATION OF WEIGHTED AVERA63

CALCULATION OF WEIGHTED AVERAGE SHARES OUTSTANDING FOR EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Earnings Per Share [Abstract]
Net income	$ 25,077	$ 23,851	$ 74,324	$ 62,581	$ 85,385
Basic weighted average shares outstanding	32,982,532	34,045,225	32,966,214	34,050,459
Plus unvested restricted stock	96,567	79,386	94,958	54,416
Diluted weighted shares outstanding	33,079,099	34,124,611	33,061,172	34,104,875
Earnings per common share
Basic	$ 0.76	$ 0.70	$ 2.25	$ 1.84
Diluted	$ 0.76	$ 0.70	$ 2.25	$ 1.83

CALCULATION OF WEIGHTED AVERA64

CALCULATION OF WEIGHTED AVERAGE SHARES OUTSTANDING FOR EARNINGS PER SHARE - Textuals (Details) - Warrant [Member] - Common Stock [Member] $ in Millions	Sep. 30, 2017USD ($)shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Warrants outstanding | $	$ 18.6
Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Warrants outstanding, number of shares | shares	243,998

STOCK-BASED COMPENSATION PLANS

STOCK-BASED COMPENSATION PLANS (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended	32 Months Ended	35 Months Ended	41 Months Ended	65 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2016	Mar. 31, 2017	Sep. 30, 2017	Sep. 30, 2017
Restricted Stock Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Expense	$ 1.6	$ 1.4		$ 4	$ 4.2
Compensation Cost Not yet Recognized	$ 9.8		$ 9.8					$ 9.8	$ 9.8
Compensation Cost Not yet Recognized, Period for Recognition			34 months
2012 Restricted Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares Authorized	300,000		300,000					300,000	300,000
2012 Restricted Stock Plan [Member] | Restricted Stock Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award Vesting Period			3 years
Award Expiration Period			10 years
Restricted stock granted									270,961
Restricted stock grants, shares vested									242,972
Restricted stock grants, shares non-vested	27,989		27,989					27,989	27,989
2014 Omnibus Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares Authorized	900,000		900,000					900,000	900,000
2014 Omnibus Incentive Plan [Member] | Restricted Stock Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock granted						372,512
Restricted stock grants, shares vested							81,148
2014 Omnibus Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock granted							34,975
Restricted stock grants, shares vested								20,967

COMMITMENTS AND CONTINGENCIES66

COMMITMENTS AND CONTINGENCIES (Commitments Without Recorded Liability) (Details)	9 Months Ended
	Sep. 30, 2017USD ($)location	Sep. 30, 2016USD ($)	Dec. 31, 2016USD ($)
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Reserve for Unfunded Loan Commitments	$ 2,400,000		$ 3,600,000
Number of Properties Subject to Non-cancelable Operating Leases | location	115
Mortgage loan applications, day interest rate is locked	45 days
Minimum [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Mortgage loan applications, day interest rate is locked	30 days
Maximum [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Mortgage loan applications, day interest rate is locked	60 days
Commitments to extend credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract or Notional Amount	$ 2,339,558,000		2,204,795,000
Standby letters of credit and financial guarantees [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract or Notional Amount	15,432,000		17,694,000
Commitments to originate loans [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract or Notional Amount	64,263,000		69,833,000
Risk Participation Agreement [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract or Notional Amount	11,516,000		7,488,000
Commitments to originate loans held for sale [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract or Notional Amount	68,976,000		69,487,000
Commitments to sell loans secured by one- to four residential properties [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract or Notional Amount	39,848,000		36,907,000
Counterparty default losses on forward contracts	0	$ 0
Commitments to sell securities related to mortgage banking activities [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract or Notional Amount	100,500,000		$ 44,000,000
Counterparty default losses on forward contracts	$ 0	$ 0

DERIVATIVES AND HEDGING (Deriva

DERIVATIVES AND HEDGING (Derivatives Designated as Hedging, by Balance Sheet Location) (Details) - USD ($) $ in Thousands		Sep. 30, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value		$ 7,186	$ 8,330
Liability Derivatives, Fair Value		7,186	8,330
Interest rate swaps [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value		7,186	8,330
Liability Derivatives, Fair Value		7,186	8,330
Interest rate swaps [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Notional/Contract Amount		4,441	5,855
Liability Derivatives, Notional/Contract Amount		4,441	5,855
Interest rate swaps [Member] | Designated as Hedging Instrument [Member] | Loans Receivable [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	[1]	531	660
Interest rate swaps [Member] | Designated as Hedging Instrument [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	[2]	$ 531	$ 660
[1]	Included in Loans receivable on the Consolidated Statements of Financial Condition.
[2]	Included in Other liabilities on the Consolidated Statements of Financial Condition.

DERIVATIVES AND HEDGING (Deri68

DERIVATIVES AND HEDGING (Derivatives Not Designated as Hedging, by Balance Sheet Location) (Details) - USD ($) $ in Thousands		Sep. 30, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value		$ 7,186	$ 8,330
Liability Derivatives, Fair Value		7,186	8,330
Interest rate swaps [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value		7,186	8,330
Liability Derivatives, Fair Value		7,186	8,330
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Notional/Contract Amount		490,199	423,424
Liability Derivatives, Notional/Contract Amount		326,125	346,842
Not Designated as Hedging Instrument [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	[1]	7,319	8,152
Not Designated as Hedging Instrument [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	[2]	6,770	7,959
Not Designated as Hedging Instrument [Member] | Interest rate swaps [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Notional/Contract Amount		303,500	309,936
Liability Derivatives, Notional/Contract Amount		303,500	309,936
Not Designated as Hedging Instrument [Member] | Interest rate swaps [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	[1]	6,655	7,670
Not Designated as Hedging Instrument [Member] | Interest rate swaps [Member] | Loans Receivable [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value		216	822
Not Designated as Hedging Instrument [Member] | Interest rate swaps [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	[2]	6,655	7,670
Not Designated as Hedging Instrument [Member] | Mortgage loan commitments [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Notional/Contract Amount		46,351	42,296
Liability Derivatives, Notional/Contract Amount		22,625	27,191
Not Designated as Hedging Instrument [Member] | Mortgage loan commitments [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	[1]	265	30
Not Designated as Hedging Instrument [Member] | Mortgage loan commitments [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	[2]	115	174
Not Designated as Hedging Instrument [Member] | Forward sales contracts [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Notional/Contract Amount		140,348	71,192
Liability Derivatives, Notional/Contract Amount		0	9,715
Not Designated as Hedging Instrument [Member] | Forward sales contracts [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	[1]	399	452
Not Designated as Hedging Instrument [Member] | Forward sales contracts [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	[2]	$ 0	$ 115
[1]	Included in Other assets on the Consolidated Statements of Financial Condition, with the exception of certain interest swaps and mortgage loan commitments (with a fair value of $216,000 at September 30, 2017 and $822,000 at December 31, 2016), which are included in Loans receivable.
[2]	Included in Other liabilities on the Consolidated Statements of Financial Condition.

DERIVATIVES AND HEDGING (Gain (

DERIVATIVES AND HEDGING (Gain (Loss) On Derivatives Not Designated in Hedging Relationship) (Details) - Not Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in income, net	$ (348)	$ (61)	$ (419)	$ 219
Mortgage loan commitments [Member] | Mortgage banking operations [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in income, net	50	(376)	235	516
Forward sales contracts [Member] | Mortgage banking operations [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in income, net	$ (398)	$ 315	$ (654)	$ (297)

DERIVATIVES AND HEDGING (Narrat

DERIVATIVES AND HEDGING (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative net liability position	$ 4.5	$ 7.6
Collateral posted	$ 18.4	$ 29.3

DERIVATIVES AND HEDGING (Deri71

DERIVATIVES AND HEDGING (Derivative Offsetting) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Offsetting Derivative Assets [Abstract]
Derivative Assets, Gross Amounts Recognized	$ 7,186	$ 8,330
Derivative Assets, Amounts offsett in the Statement of Financial Condition	0	0
Derivative Assets, Net Amounts in the Statement of Financial Condition	7,186	8,330
Derivative Assets, Netting Adjustment Per Applicable Master Netting Agreements	(1,148)	(362)
Derivative Assets, Fair Value of Financial Collateral in the Statement of Financial Condiation	0	0
Derivative Assets, Net Amount	6,038	7,968
Offsetting Derivative Liabilities [Abstract]
Derivative Liabilities, Gross Amounts Recognized	7,186	8,330
Derivative Liabilities, Amounts offset in the Statement of Financial Condition	0	0
Derivative Liabilities, Net Amounts of the Statement of Financial Condition	7,186	8,330
Derivative Liabilities, Net Adjustment Per Applicable Master Netting Agreements	(1,148)	(362)
Derivative Liabilities, Fair Value of Financial Collateral in the Statement of Financial Condition	(4,461)	(7,557)
Derivative Liabilities, Net Amount	1,577	411
Interest rate swaps [Member]
Offsetting Derivative Assets [Abstract]
Derivative Assets, Gross Amounts Recognized	7,186	8,330
Derivative Assets, Amounts offsett in the Statement of Financial Condition	0	0
Derivative Assets, Net Amounts in the Statement of Financial Condition	7,186	8,330
Derivative Assets, Netting Adjustment Per Applicable Master Netting Agreements	(1,148)	(362)
Derivative Assets, Fair Value of Financial Collateral in the Statement of Financial Condiation	0	0
Derivative Assets, Net Amount	6,038	7,968
Offsetting Derivative Liabilities [Abstract]
Derivative Liabilities, Gross Amounts Recognized	7,186	8,330
Derivative Liabilities, Amounts offset in the Statement of Financial Condition	0	0
Derivative Liabilities, Net Amounts of the Statement of Financial Condition	7,186	8,330
Derivative Liabilities, Net Adjustment Per Applicable Master Netting Agreements	(1,148)	(362)
Derivative Liabilities, Fair Value of Financial Collateral in the Statement of Financial Condition	(4,461)	(7,557)
Derivative Liabilities, Net Amount	$ 1,577	$ 411

SUBSEQUENT EVENT (Details)

SUBSEQUENT EVENT (Details) - Subsequent Event [Member]	Oct. 06, 2017USD ($)
Subsequent Event [Line Items]
LoansIncludedInPurchaseAndSaleAgreement	$ 255,000,000
DepositsIncludedInPurchaseAndSaleAgreement	160,000,000
Property and equipment included in sale of branches	3,900,000
Accrued interest included in sale of branches	581,000
Goodwill included in sale of branches	1,800,000
Other intangibles included in sale of branches	1,100,000
EstimatedDepositPremiumFromSaleOfBranches	13,800,000
Net gain from sale of branches	$ 12,000,000