WSFS Financial (WSFS) 10-Q 8 Nov 18 2018 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Nov. 02, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3
Trading Symbol	WSFS
Entity Registrant Name	WSFS FINANCIAL CORP
Entity Central Index Key	828,944
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding (in shares)		31,369,448

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Interest income:
Interest and fees on loans	$ 67,164	$ 58,504	$ 192,071	$ 169,258
Interest on mortgage-backed securities	6,662	4,955	18,251	14,132
Interest and dividends on investment securities:
Taxable	14	14	47	137
Tax-exempt	1,065	1,125	3,260	3,387
Other interest income	510	412	1,550	1,256
Total interest income	75,415	65,010	215,179	188,170
Interest expense:
Interest on deposits	7,977	3,862	19,585	10,278
Interest on senior debt	1,179	1,807	3,538	6,049
Interest on Federal Home Loan Bank advances	2,097	2,402	7,096	6,057
Interest on federal funds purchased and securities sold under agreements to repurchase	381	273	1,261	709
Interest on trust preferred borrowings	677	500	1,871	1,418
Interest on other borrowings	7	37	28	113
Total interest expense	12,318	8,881	33,379	24,624
Net interest income	63,097	56,129	181,800	163,546
Provision for loan losses	3,716	2,896	9,864	6,901
Net interest income after provision for loan losses	59,381	53,233	171,936	156,645
Noninterest income:
Securities gains, net	0	736	21	1,764
Unrealized gains on equity investments	3,249	0	18,595	0
Realized gain on sale of equity investment	3,757	0	3,757	0
Loan fee income	693	483	1,859	1,483
Bank owned life insurance income	96	546	328	1,124
Total non interest income	41,901	32,441	124,355	92,209
Noninterest expense:
Salaries, benefits and other compensation	30,641	29,172	91,438	86,231
Occupancy expense	4,697	4,756	14,953	14,602
Equipment expense	3,258	2,922	9,523	9,544
Data processing and operations expenses	1,962	1,817	5,765	5,185
Professional fees	2,358	2,248	6,403	6,552
Marketing expense	1,499	712	3,341	2,268
Early extinguishment of debt	0	695	0	695
FDIC expenses	518	560	1,632	1,683
Loan workout and OREO expenses	(19)	484	1,088	1,504
Corporate development expense	3,794	153	4,251	857
(Recovery of) provision for legal settlement	(7,938)	0	(7,938)	0
(Recovery of) provision for fraud loss	(10)	0	(1,675)	0
Other operating expense	11,694	10,644	34,916	29,275
Total non interest expenses	52,454	54,163	163,697	158,396
Income before taxes	48,828	31,511	132,594	90,458
Income tax provision	9,893	10,942	27,569	30,382
Net income	$ 38,935	$ 20,569	$ 105,025	$ 60,076
Earnings per share:
Basic (in dollars per share)	$ 1.22	$ 0.65	$ 3.32	$ 1.91
Diluted (in dollars per share)	$ 1.20	$ 0.64	$ 3.26	$ 1.86
Credit/debit card and ATM income
Noninterest income:
Deposit service charges	$ 11,239	$ 9,350	$ 31,753	$ 26,406
Investment management and fiduciary income
Noninterest income:
Deposit service charges	10,029	8,809	29,462	25,683
Deposit service charges
Noninterest income:
Deposit service charges	4,670	4,695	13,964	13,652
Mortgage banking activities, net
Noninterest income:
Deposit service charges	1,509	1,756	4,938	4,785
Other income
Noninterest income:
Deposit service charges	$ 6,659	$ 6,066	$ 19,678	$ 17,312

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 38,935	$ 20,569	$ 105,025	$ 60,076
Net change in unrealized (loss) gains on investment securities available for sale
Net unrealized (loss) gains arising during the period, net of tax (benefit) expense of ($1,846), $761, ($6,958) and $3,498, respectively	(6,042)	1,289	(22,370)	5,802
Less: reclassification adjustment for net gains on sales realized in net income, net of tax expense of $0, $261, $5, and $628, respectively	0	(475)	(16)	(1,136)
Net change in unrealized gains (losses) on investment securities available-for-sale	(6,042)	814	(22,386)	4,666
Net change in securities held to maturity
Amortization of unrealized gain on securities reclassified to held-to-maturity, net of tax expense (benefit) of $36, $60, $109 and $181, respectively	(107)	(99)	(343)	(297)
Net change in unfunded pension liability
Change in unfunded pension liability related to unrealized (loss) gain, prior service cost and transition obligation, net of tax (benefit) expense of $(9), ($15), $1, and ($42), respectively	(30)	(22)	(1)	(67)
Net change in cash flow hedge
Net unrealized (loss) gain arising during the period, net of tax expense (benefit) of ($75), $26, ($391) and $118 respectively	(109)	42	(1,119)	192
Total other comprehensive (loss) income	(6,288)	735	(23,849)	4,494
Total comprehensive income	$ 32,647	$ 21,304	$ 81,176	$ 64,570

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net change in Unrealized (losses) gains, tax (benefit) expense	$ (1,846)	$ 761	$ (6,958)	$ 3,498
Reclassification adjustment for gains, tax expense	0	261	5	628
Amortization of unrealized gain on securities reclassified to held-to-maturity, tax expense	36	60	109	181
Change in unfunded pension liability related to unrealized (loss) gain, prior service cost and transition obligation, tax (benefit) expense	(9)	(15)	1	(42)
Reclassification adjustment related to derivatives, tax benefit (expense)	$ (75)	$ 26	$ (391)	$ 118

CONSOLIDATED STATEMENTS OF FINA

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Assets:
Cash and due from banks	$ 158,234	$ 122,141
Cash in non-owned ATMs	552,952	598,117
Interest-bearing deposits in other banks including collateral of $0 and $3,380 at September 30, 2018 and December 31, 2017, respectively	186	3,608
Total cash and cash equivalents	711,372	723,866
Investment securities, available for sale (amortized cost of $1,036,905 at September 30, 2018 and $847,791 at December 31, 2017)	997,131	837,499
Investment securities, held to maturity-at cost (fair value of $150,583 at September 30, 2018 and $162,853 at December 31, 2017)	152,577	161,186
Other investments	35,083	17,971
Loans, held for sale at fair value	35,855	31,055
Loans, net of allowance for loan losses of $41,812 at September 30, 2018 and $40,599 at December 31, 2017	4,886,136	4,776,318
Bank owned life insurance	6,840	102,958
Stock in Federal Home Loan Bank of Pittsburgh at cost	16,540	31,284
Other real estate owned	2,004	2,503
Accrued interest receivable	21,331	19,405
Premises and equipment	46,348	47,983
Goodwill	166,007	166,007
Intangible assets	20,577	22,437
Other assets	62,041	59,068
Total assets	7,159,842	6,999,540
Deposits:
Noninterest-bearing	1,515,336	1,420,760
Interest-bearing	4,208,580	3,826,844
Total deposits	5,723,916	5,247,604
Federal funds purchased	0	28,000
Federal Home Loan Bank advances	338,465	710,001
Trust preferred borrowings	67,011	67,011
Senior debt	98,334	98,171
Other borrowed funds	41,279	34,623
Accrued interest payable	7,119	1,037
Other liabilities	84,896	88,748
Total liabilities	6,361,020	6,275,195
Stockholders’ Equity:
Common stock $0.01 par value, 65,000,000 shares authorized; issued 56,880,335 at September 30, 2018 and 56,279,527 at December 31, 2017	567	563
Capital in excess of par value	347,900	336,271
Accumulated other comprehensive loss	(32,001)	(8,152)
Retained earnings	764,765	669,557
Treasury stock at cost, 25,028,145 shares at September 30, 2018 and 24,861,145 shares at December 31, 2017	(282,409)	(273,894)
Total stockholders’ equity	798,822	724,345
Total liabilities and stockholders’ equity	$ 7,159,842	$ 6,999,540

CONSOLIDATED STATEMENTS OF FI_2

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Interest-bearing deposits in banks and other financial institutions, collateral	$ 0	$ 3,380
Available-for-sale securities, amortized cost basis	1,036,905	847,791
Held-to-maturity securities, fair value	150,583	162,853
Allowance for loan losses	$ 41,812	$ 40,599
Common stock, shares authorized (in shares)	65,000,000	65,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, issued (in shares)	56,880,335	56,279,527
Treasury stock, shares (in shares)	25,028,145	24,861,145

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Capital in Excess of Par Value	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Treasury Stock
Beginning Balance at Dec. 31, 2016	$ 687,336	$ 580	$ 329,457	$ (7,617)	$ 627,078	$ (262,162)
Beginning Balance (in shares) at Dec. 31, 2016		55,995,219
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	60,076				60,076
Other comprehensive income (loss)	4,494			4,494
Cash dividend	(6,600)				(6,600)
Issuance of common stock including proceeds from exercise of common stock options	2,317	$ 2	2,315
Issuance of common stock including proceeds from exercise of common stock options (in shares)		222,424
Stock-based compensation expense	2,449		2,449
Repurchase of common stock	$ (9,211)					(9,191)
Repurchase of common stock (in shares)	(204,000)	(20,000)
Ending Balance at Sep. 30, 2017	$ 740,861	$ 562	334,221	(3,123)	680,554	(271,353)
Ending Balance (in shares) at Sep. 30, 2017		56,217,643
Beginning Balance at Jun. 30, 2017				(3,858)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	20,569
Other comprehensive income (loss)	735
Ending Balance at Sep. 30, 2017	740,861	$ 562	334,221	(3,123)	680,554	(271,353)
Ending Balance (in shares) at Sep. 30, 2017		56,217,643
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reclassification due to the adoption of ASU No. 2016-01	0			20	(20)
Beginning Balance at Dec. 31, 2017	724,345	$ 563	336,271	(8,152)	669,557	(273,894)
Beginning Balance (in shares) at Dec. 31, 2017		56,279,527
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	105,025				105,025
Other comprehensive income (loss)	(23,849)			(23,869)
Cash dividend	(9,797)				(9,797)
Issuance of common stock including proceeds from exercise of common stock options	9,776	$ 4	9,772
Issuance of common stock including proceeds from exercise of common stock options (in shares)		600,808
Stock-based compensation expense	1,857		1,857
Repurchase of common stock	$ (8,515)					(8,515)
Repurchase of common stock (in shares)	(167,000)
Ending Balance at Sep. 30, 2018	$ 798,822	$ 567	347,900	(32,001)	764,765	(282,409)
Ending Balance (in shares) at Sep. 30, 2018		56,880,335
Beginning Balance at Jun. 30, 2018				(25,713)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	38,935
Other comprehensive income (loss)	(6,288)
Ending Balance at Sep. 30, 2018	$ 798,822	$ 567	$ 347,900	$ (32,001)	$ 764,765	$ (282,409)
Ending Balance (in shares) at Sep. 30, 2018		56,880,335

CONSOLIDATED STATEMENTS OF CH_2

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Unaudited) (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Statement of Stockholders' Equity [Abstract]
Cash dividend (in dollars per share)	$ 0.31	$ 0.21
Repurchase of common stock (in shares)	167,000	204,000

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Operating activities:
Net income	$ 105,025	$ 60,076
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	9,864	6,901
Depreciation of premises and equipment, net	6,347	6,454
Amortization of fees and discounts, net	11,952	15,002
Amortization of intangible assets	2,223	2,352
Income from mortgage banking activities, net	(4,938)	(4,785)
Gain on sale of securities, net	(21)	(1,764)
Loss on sale of other real estate owned and valuation adjustments, net	83	187
Stock-based compensation expense	1,857	2,449
Unrealized gain on equity investments	(18,595)	0
Debt extinguishment cost	0	695
Deferred income tax expense	3,330	3,097
(Increase) decrease in accrued interest receivable	(1,926)	(762)
Decrease (increase) in other assets	3,171	(7,451)
Origination of loans held for sale	(265,674)	(258,962)
Proceeds from sales of loans held for sale	257,026	284,797
Increase in accrued interest payable	6,083	2,731
(Decrease) increase in other liabilities	(5,273)	962
Increase in value of bank owned life insurance	(311)	(899)
Increase in capitalized interest, net	(2,795)	(3,252)
Net cash provided by operating activities	107,428	107,828
Investing activities:
Purchases of investment securities held to maturity	0	0
Repayments, maturities and calls of investment securities held to maturity	7,055	1,175
Sale of investment securities available for sale	7,012	415,486
Purchases of investment securities available for sale	(280,401)	(593,878)
Repayments of investment securities available for sale	82,501	174,251
Proceeds of bank-owned life insurance death benefit	0	371
Proceeds from bank-owned life insurance surrender	96,429	0
Net increase in loans	(119,641)	(231,955)
Purchases of stock of Federal Home Loan Bank of Pittsburgh	(137,199)	(128,159)
Redemptions of stock of Federal Home Loan Bank of Pittsburgh	151,943	133,130
Sales of other real estate owned	2,323	4,405
Investment in premises and equipment	(4,910)	(7,336)
Sales of premises and equipment	201	1,593
Net cash used for investing activities	(194,687)	(230,917)
Financing activities:
Net increase in demand and saving deposits	341,411	320,784
Increase (decrease) in time deposits	83,788	(36,055)
Increase in brokered deposits	57,638	35,079
Decrease in loan payable	0	(359)
Receipts from FHLB advances	85,335,984	109,432,123
Repayments of FHLB advances	(85,707,520)	(109,588,547)
Receipts from federal funds purchased and securities sold under agreement to repurchase	18,821,100	17,610,000
Repayments of federal funds purchased and securities sold under agreement to repurchase	(18,849,100)	(17,670,000)
Dividends paid	(9,797)	(6,600)
Issuance of common stock and exercise of common stock options	9,776	2,317
Redemption of senior debt	0	(55,000)
Purchase of treasury stock	(8,515)	(9,211)
Net cash provided by financing activities	74,765	34,531
Decrease in cash and cash equivalents	(12,494)	(88,558)
Cash and cash equivalents at beginning of period	723,866	821,923
Cash and cash equivalents at end of period	711,372	733,365
Supplemental Disclosure of Cash Flow Information:
Interest	27,297	21,893
Income taxes	21,754	20,861
Non-cash information:
Loans transferred to other real estate owned	1,907	4,925
Loans transferred to portfolio from held-for-sale at fair value	7,261	12,782
Goodwill adjustments, net	$ 0	$ (1,532)

BASIS OF PRESENTATION

BASIS OF PRESENTATION	9 Months Ended
	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
BASIS OF PRESENTATION	1. BASIS OF PRESENTATION General Our unaudited Consolidated Financial Statements include the accounts of WSFS Financial Corporation (the Company or WSFS), Wilmington Savings Fund Society, FSB (WSFS Bank or the Bank), WSFS Wealth Management, LLC (Powdermill), WSFS Capital Management, LLC (West Capital), Cypress Capital Management, LLC (Cypress) and Christiana Trust Company of Delaware (Christiana Trust DE). We also have one unconsolidated subsidiary, WSFS Capital Trust III. WSFS Bank has three wholly-owned subsidiaries: WSFS Investment Group, Inc. (WSFS Wealth Investments), 1832 Holdings, Inc. and Monarch Entity Services, LLC. Overview Founded in 1832, the Bank is one of the ten oldest bank and trust companies continuously operating under the same name in the United States (U.S.). We provide residential and commercial real estate, commercial and consumer lending services, as well as retail deposit and cash management services. Lending activities are funded primarily with customer deposits and borrowings. In addition, we offer a variety of wealth management and trust services to personal and corporate customers. The Federal Deposit Insurance Corporation (FDIC) insures our customers’ deposits to their legal maximums. We serve our customers primarily from 77 offices located in Delaware ( 46 ), Pennsylvania ( 29 ), Virginia ( 1 ) and Nevada ( 1 ) and through our website at www.wsfsbank.com . Information on our website is not incorporated by reference into this quarterly report. In preparing the unaudited Consolidated Financial Statements, we are required to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenue and expenses. Amounts subject to significant estimates include the allowance for loan losses and reserves for lending-related commitments, goodwill, intangible assets, post-retirement benefit obligations, the fair value of financial instruments, and other-than-temporary impairment (OTTI). Among other effects, changes to these estimates could result in future impairments of investment securities, goodwill and intangible assets, the establishment of the allowance and lending-related commitments as well as increased post-retirement benefits expense. Our accounting and reporting policies conform to Generally Accepted Accounting Principles (GAAP) in the U.S., prevailing practices within the banking industry for interim financial information and Rule 10-01 of SEC Regulation S-X (Rule 10-01). Rule 10-01 does not require us to include all information and notes that would be required in audited financial statements. Certain prior period amounts have been reclassified to conform with current period presentation. Operating results for the periods presented are not necessarily indicative of the results that may be expected for any future quarters or for the year ending December 31, 2018 . These unaudited, interim Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and related notes included in our Annual Report on Form 10-K for the year ended December 31, 2017 (the 2017 Annual Report on Form 10-K) that was filed with the SEC on March 1, 2018 and is available at www.sec.gov or on our website at http://investors.wsfsbank.com/financials.cfm. All significant intercompany transactions were eliminated in consolidation. Business Combinations On August 7, 2018, WSFS and Beneficial Bancorp, Inc. (Beneficial) entered into an Agreement and Plan of Reorganization, (as amended from time to time, the Merger Agreement) pursuant to which, subject to the terms and conditions of the Agreement, among other things, (i) Beneficial will merge with and into WSFS, with WSFS continuing as the surviving corporation and (ii) concurrently, Beneficial Bank will merge with and into WSFS Bank, with WSFS Bank continuing as the surviving bank. Subject to the terms and conditions of the Merger Agreement, stockholders of Beneficial will receive 0.3013 shares of WSFS common stock and $2.93 in cash for each share of Beneficial common stock. These mergers, subject to customary closing conditions including required regulatory approvals and stockholder approvals, are expected to close in Q1 2019. Significant Accounting Policies: The significant accounting policies used in preparation of our Consolidated Financial Statements are disclosed in our 2017 Annual Report on Form 10-K. Those significant accounting policies remain unchanged at September 30, 2018 , except as described below: Equity Securities Following our adoption of ASU 2016-01 on January 1, 2018, as described in " Recent Accounting Pronouncements ", we account for our investments in equity securities in accordance with ASC 321-10 Investments - Equity Securities. Our equity securities may be classified into two categories and accounted for as follows: • Equity securities with a readily determinable fair value are reported at fair value, with unrealized gains and losses included in earnings. Any dividends received are recorded in interest income. • Equity securities without a readily determinable fair value are reported at their cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or similar investment of the same issuer and their impact on fair value. Any dividends received are recorded in interest income. Equity investments include our investment in Visa Class B shares and certain other equity investments. The fair value of equity investments with readily determinable fair values is primarily obtained from third-party pricing services. For equity investments without readily determinable fair values, when an orderly transaction for the identical or similar investment of the same issuer is identified, we use the valuation techniques permitted under ASC 820 Fair Value Measuremen t to evaluate the observed transaction(s) and adjust the fair value of the equity investment. ASC 321-10 also provides guidance related to accounting for impairment of equity securities without readily determinable fair values. The qualitative assessment to determine whether impairment exists requires the use of our judgment in certain circumstances. If, after completing the qualitative assessment, we conclude an equity investment without a readily determinable fair value is impaired, a loss for the difference between the equity investment’s carrying value and its fair value may be recognized as a reduction to noninterest income in the Consolidated Statements of Income. RECENT ACCOUNTING PRONOUNCEMENTS Accounting Guidance Adopted in 2018 In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2014-09, Revenue from Contracts with Customers (Topic 606). This ASU supersedes the revenue recognition requirements in ASC 605, Revenue Recognition . ASU No. 2014-09 requires an entity to recognize revenue when it transfers promised goods or services to customers using a five-step model in which entities should exercise judgment when considering the terms of the contracts. In August 2015, the FASB issued ASU No. 2015-14, Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date . This amendment deferred the effective date of ASU 2014-09 by one year. In March 2016, the FASB issued ASU 2016-08, Principal versus Agent Considerations (Reporting Gross versus Net), which amends the principal versus agent guidance and clarifies that the analysis must focus on whether the entity has control of the goods or services before they are transferred to the customer. In addition, the FASB issued ASU Nos. 2016-20, Technical Corrections and Improvements to Topic 606, Revenue from Contracts with Customers and 2016-12, Narrow-Scope Improvements and Practical Expedients , both of which provide additional clarification on certain provisions in Topic 606. These ASC updates were effective for public business entities with annual and interim reporting periods in fiscal years beginning after December 15, 2017. The standard permits the use of either the retrospective or modified retrospective with the cumulative effect transition method. The Company adopted the standard on January 1, 2018. Consistent with the transition guidance in ASC 606, results for reporting periods beginning after January 1, 2018 are presented in accordance with ASC 606, while prior period amounts are reported in accordance with ASC 605. For revenue streams determined to be within the scope of the new standard, we concluded that the adoption of the standard did not have a material effect on our Consolidated Financial Statements at the time of adoption. See Note 2 for additional disclosures resulting from our adoption of this standard. In January 2016, the FASB issued ASU No. 2016-01, Financial Instruments - Overall (Subtopic 825-10), Recognition and Measurement of Financial Assets and Financial Liabilities. This amendment requires that equity investments be measured at fair value with changes in fair value recognized in net income. When fair value is not readily determinable, an entity may elect to measure the equity investment at cost, less impairment, plus or minus any change in the investment’s observable price. For financial liabilities that are measured at fair value, the amendment requires an entity to present separately, in other comprehensive income, any change in fair value resulting from a change in instrument specific credit risk. This guidance is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is permitted. The standard requires retrospective application for equity investments with readily determinable fair values and prospective application for equity investments without readily determinable fair values. The Company adopted the standard on January 1, 2018 on a prospective basis for its equity investments without readily determinable fair values, and the adoption of the standard did not have an effect on our Consolidated Financial Statements at the time of adoption. Subsequent to the filing of our 2017 Annual Report on Form 10-K, we identified observable transactions related to an equity investment without a readily determinable fair value. These identified, observable transactions required the revaluation of this equity investment. The result of the revaluation was recorded in the Consolidated Statements of Income in the first quarter of 2018. See Note 10 for further information. In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments . ASU 2016-15 represents the Emerging Issues Task Force’s final consensus on eight issues related to the classification of cash payments and receipts in the statement of cash flows for a number of common transactions. The consensus also clarifies when identifiable cash flows should be separated versus classified based on their predominant source or use. This guidance is effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. The Company adopted this standard on January 1, 2018, on a retrospective basis and the adoption did not have an effect on the Consolidated Financial Statements. In January 2017, the FASB issued ASU 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business. ASU 2017-01 provides a new, two-step framework for determining whether a transaction is accounted for as an acquisition (or disposal) of assets or a business. The first step is evaluating whether substantially all of the fair value of the gross assets acquired is concentrated in a single identifiable asset or a group of similar identifiable assets; if so, the transaction is not considered a business. Also, in order to be considered a business, the transaction would need to include an input and a substantive process that together significantly contribute to the ability to create outputs. The guidance is effective for public entities in annual and interim periods in fiscal years beginning after December 15, 2017. Early adoption is permitted for transactions that have not been reported in financial statements that have been issued or been made available for issuance. The Company adopted this standard on January 1, 2018, on a prospective basis with no impact to the Consolidated Financial Statements at the time of adoption. In February 2017, the FASB issued ASU No. 2017-05, Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets. ASU 2017-05 provides clarification of the scope of ASC 610-20. Specifically, the new guidance clarifies that ASC 610-20 applies to nonfinancial assets which do not meet the definition of a business or not-for-profit activity. Further, a financial asset is within the scope of ASC 610-20 if it meets the definition of an in-substance nonfinancial asset which is defined as a financial asset promised to a counterparty in a contract where substantially all of the assets promised are nonfinancial. Finally, each distinct nonfinancial asset and in-substance nonfinancial asset should be derecognized when the counterparty obtains control. The guidance is effective in annual and interim reporting periods in fiscal years beginning after December 15, 2017. Early application is permitted for all entities, but not before annual reporting periods beginning after December 15, 2016. The Company adopted this standard on January 1, 2018, on a modified retrospective basis and the adoption did not have an effect on the Consolidated Financial Statements at the time of adoption. In March 2017, the FASB issued ASU No. 2017-07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. The new guidance requires that the service cost component of net periodic pension cost be disclosed with other compensation costs in the income statement. For all other cost components, an entity must either separately disclose the other cost components in separate line item(s) outside a subtotal of income from operations in the income statement or disclose the line item(s) used to present the other cost components in the income statement. The guidance is effective in annual and interim periods in fiscal years beginning after December 15, 2017. Early adoption is permitted. The Company adopted this standard on January 1, 2018, on a retrospective basis with no impact to the Consolidated Financial Statements at the time of adoption. In May 2017, the FASB issued ASU No. 2017-09, Scope of Modification Accounting . The new guidance clarifies when changes to the terms or conditions of a share-based payment award must be accounted for as modifications. If the award’s fair value, vesting conditions and classification remain the same immediately before and after the change, modification accounting is not applied. Additionally, the guidance does not require valuation before or after the change if the change does not affect any of the inputs to the model used to value the award. The guidance is effective in annual and interim periods beginning after December 15, 2017. Early adoption is permitted. The new guidance will be applied on a prospective basis to awards modified on or after the adoption date. The Company adopted this standard on January 1, 2018, on a prospective basis with no impact to the Consolidated Financial Statements at the time of adoption. Accounting Guidance Pending Adoption at September 30, 2018 In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) . This ASU revises the accounting related to lessee accounting. Under the new guidance, lessees will be required to recognize a lease liability and a right-of-use asset for substantially all leases. The new lease guidance also simplifies the accounting for sale and leaseback transactions primarily because lessees must recognize lease assets and lease liabilities. ASU 2016-02 is effective for the first interim period within annual periods beginning after December 15, 2018, with early adoption permitted. Adoption using the modified retrospective transition approach is required; however, in July 2018, the FASB issued ASU 2018-11, Leases-Targeted Improvements, which provides an optional transition method whereby comparative periods presented in the financial statements in the period of adoption do not need to be restated under Topic 842. The Company will adopt this guidance on January 1, 2019. The Company has substantially completed its process of identifying its lease population as defined by this guidance and anticipates finalizing the impact analysis on the Consolidated Financial Statements in the fourth quarter. To date, our review suggests that adoption will increase assets and liabilities on our Consolidated Statements of Financial Condition. The Company will continue to assess the impact of this guidance, taking into consideration available accounting policy elections and significant assumptions and judgments such as the discount rate and renewal options. In addition, the Company continues to evaluate its internal systems, accounting policies, processes and related internal controls for potential effects. To date, we have been working to implement a lease accounting and administration software to assist us with initial and on-going requirements of the new guidance. The Company expects to complete the implementation in the fourth quarter. In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326). ASU 2016-13 replaces the incurred loss impairment methodology in current GAAP with an expected credit loss methodology and requires consideration of a broader range of information to determine credit loss estimates. Financial assets measured at amortized cost will be presented at the net amount expected to be collected by using an allowance for credit losses. Purchased credit impaired loans will receive an allowance account at the acquisition date that represents a component of the purchase price allocation. Credit losses relating to available-for-sale debt securities will be recorded through an allowance for credit losses, with such allowance limited to the amount by which fair value is below amortized cost. This guidance is effective for fiscal years beginning after December 15, 2019 and interim periods within those fiscal years. The Company does not plan to early adopt this guidance and will adopt this guidance on January 1, 2020. A cross-functional team from Finance, Credit, and IT is leading the implementation efforts to evaluate the impact of this guidance on the Company’s Consolidated Financial Statements, internal systems, accounting policies, processes and related internal controls. To date, we have selected a software solution to assist us with the initial and on-going requirements of the new guidance and are currently in the early stages of implementing the software. We have engaged third-party experts and specialists, where necessary, to assist with the implementation efforts. We continue to perform due diligence on acceptable methodologies under the guidance, as well as evaluate the potential effects to our accounting policies, processes and related internal controls. Our review of this guidance to date suggests that adoption may materially increase the allowance for loan losses and decrease capital levels; however, the extent of these impacts will depend on the asset quality of the portfolio, macroeconomic conditions, and significant estimates and judgments made by management at the time of adoption. In January 2017, the FASB issued ASU 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment . ASU 2017-04 simplifies the measurement of goodwill impairment by removing the hypothetical purchase price allocation. The new guidance requires an impairment of goodwill be measured as the amount by which a reporting unit’s carrying value exceeds its fair value, up to the amount of goodwill recorded. The guidance is effective in annual and interim periods in fiscal years beginning after December 15, 2019. Early adoption is permitted for goodwill impairment tests with measurement dates after January 1, 2017, using the prospective method of adoption. The Company does not expect the application of this guidance to have a material impact on its Consolidated Financial Statements. In March 2017, the FASB issued ASU No. 2017-08, Premium Amortization on Purchased Callable Debt Securities . The new guidance requires the amortization period for certain non-contingent callable debt securities held at a premium to end at the earliest call date of the debt security. If the call option is not exercised at the earliest call date, the guidance requires the debt security's effective yield to be reset based on the contractual payment terms of the debt security. The guidance is effective in annual and interim periods in fiscal years beginning after December 15, 2018. Early adoption is permitted. Use of the modified retrospective method, with a cumulative-effect adjustment to retained earnings is required. In the period of adoption, a change in accounting principle disclosure is required. The Company does not expect the application of this guidance to have a material impact on its Consolidated Financial Statements. In August 2017, the FASB issued ASU No. 2017-12, Targeted Improvements to Accounting for Hedging Activities (Topic 815) . The new guidance changes both the designation and measurement guidance for qualifying hedging relationships and simplifies the presentation of hedge results. Specifically, the guidance eliminates the requirement to separately measure and report hedge ineffectiveness and also aligns the recognition and presentation of the effects of the hedging instrument and the hedged item in the financial statements. Further, the new guidance provides entities the ability to apply hedge accounting to additional hedging strategies as well as permits a one-time reclassification of eligible to be hedged instruments from held to maturity to available for sale upon adoption. The guidance is effective in annual and interim periods beginning after December 15, 2018. Early adoption is permitted. Adoption using the modified retrospective approach is required for hedging relationships that exist as of the date of adoption; presentation and disclosure requirements are applied prospectively. The Company does not expect the application of this guidance to have a material impact on its Consolidated Financial Statements, except for the one-time reclassification, if elected. In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement Disclosure Framework, which amends ASC 820 - Fair Value Measurement . The ASU modifies, adds and removes certain disclosures aimed to improve the overall usefulness of the disclosure requirements for fair value measurements. The guidance is effective in annual and interim periods in fiscal years beginning after December 15, 2019. Early adoption is permitted. Adoption is required on both a prospective and retrospective basis depending on the amendment. The Company does not expect the application of this guidance to have a material impact on its Consolidated Financial Statements. In August 2018, the FASB issued ASU No. 2018-14, Compensation-Retirement Benefits - Defined Benefit Plans-General (Topic 715) which applies to all employers that provide defined benefit pension or other postretirement benefit plans for their employees. The ASU modifies, adds and removes certain disclosures aimed to improve the overall usefulness of the disclosure requirements to financial statement users. The guidance is effective for annual periods beginning after December 15, 2020. Early adoption is permitted. Use of the retrospective method is required. The Company does not expect the application of this guidance to have a material impact on its Consolidated Financial Statements. In August 2018, the FASB issued ASU No. 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Topic 350). The new guidance provides clarity on capitalizing and expensing implementation costs for cloud computing arrangements in a service contract. If an implementation cost is capitalized, the cost should be recognized over the noncancellable term and periodically assessed for impairment. The guidance is effective in annual and interim periods in fiscal years beginning after December 15, 2019. Early adoption is permitted. Adoption should be applied retrospectively or prospectively to all implementation costs incurred after the date of adoption. Our preliminary review of this guidance to date suggests that adoption may result in a material amount of implementation costs being deferred; however, the extent of the impact will depend on the cloud computing implementations occurring at the time of adoption.

NONINTEREST INCOME

NONINTEREST INCOME	9 Months Ended
	Sep. 30, 2018
Revenue from Contract with Customer [Abstract]
NONINTEREST INCOME	2. NONINTEREST INCOME On January 1, 2018, we adopted ASU 2014-09, Revenue from Contracts with Customers (Topic 606) and all subsequent ASUs that modified Topic 606. The standard applies to certain revenue streams included in noninterest income on our unaudited Consolidated Statements of Income. See Note 1 for further information about our adoption of ASU 2014-09, and Note 12 for further information about the disaggregation of noninterest income by segment. Credit/debit card and ATM income The following table presents the components of credit/debit card and ATM income: Three Months Ended September 30, Nine Months Ended September 30, (Dollars in thousands) 2018 2017 2018 2017 Bailment fees $ 7,188 $ 5,603 $ 19,869 $ 15,467 Interchange fees 3,766 3,469 11,073 10,164 Other card and ATM fees 285 278 811 775 Total credit/debit card and ATM income $ 11,239 $ 9,350 $ 31,753 $ 26,406 Credit/debit card and ATM income is primarily composed of bailment fees which are earned from bailment arrangements with our customers. Bailment arrangements are legal relationships in which property is delivered to another party's temporary custody and control without a transfer of ownership. The party receiving the property (the bailee) has possession and control of the property and is obligated to take reasonable care of the property. The party who transferred the property (the bailor) retains ownership interest of the property. In the event that the bailee files for bankruptcy protection, the property is not included in the bailee's assets. The bailee pays an agreed-upon fee for the use of the bailor's property in exchange for the bailor allowing use of the assets at the bailee's site. Bailment fees are earned from cash that is owned by WSFS but available for customers' use at an offsite location, such as cash located in an ATM at a customer's place of business. These fees are typically indexed to a market interest rate. This revenue stream generates fee income through monthly billing for bailment services. Credit/debit card and ATM income also includes interchange fees. Interchange fees are paid by a merchant's bank to a bank that issued a debit or credit card used in a transaction to compensate the issuing bank for the value and benefit the merchant receives from accepting electronic payments. These revenue streams generate fee income at the time a transaction occurs and are recorded as revenue at the time of the transaction. Investment management and fiduciary income The following table presents the components of investment management and fiduciary income: Three Months Ended September 30, Nine Months Ended September 30, (Dollars in thousands) 2018 2017 2018 2017 Trust fees $ 5,932 $ 5,044 $ 17,298 $ 14,317 Wealth management and advisory fees 4,097 3,765 12,164 11,366 Total investment management and fiduciary income $ 10,029 $ 8,809 $ 29,462 $ 25,683 Investment management and fiduciary income is primarily composed of trust fees and wealth management and advisory fees. Trust fees are based on revenue earned from investment and trustee services to families and individuals across the U.S.; custody, escrow and trustee services on structured finance transactions; indenture trustee, administrative agent and collateral agent services to institutions and corporations; and commercial domicile and independent director services. Most fees are flat fees, except for a portion of personal and corporate trustee fees where we earn a percentage on the assets under management. This revenue stream primarily generates fee income through monthly, quarterly and annual billings for services provided. Wealth management and advisory fees consists of fees from Cypress, West Capital, Powdermill, WSFS Wealth Client Management, WSFS Wealth Investments and Christiana Trust. Wealth management and advisory fees are based on revenue earned from services including asset management, financial planning, family office, and brokerage. The fees are based on the market value of assets, are assessed as a flat fee, or are brokerage commissions. This revenue stream primarily generates fee income through quarterly and annual billing for the services. Deposit service charges The following table presents the components of deposit service charges: Three Months Ended September 30, Nine Months Ended September 30, (Dollars in thousands) 2018 2017 2018 2017 Service fees $ 2,663 $ 2,603 $ 7,877 $ 7,526 Return and overdraft fees 1,885 1,973 5,662 5,660 Other deposit service fees 122 119 425 466 Total deposit service charges $ 4,670 $ 4,695 $ 13,964 $ 13,652 Deposit service charges includes revenue earned from our core deposit products, certificates of deposit, and brokered deposits. We generate revenues from deposit service charges primarily through service charges and overdraft fees. Service charges consist primarily of monthly account maintenance fees, cash management fees, foreign ATM fees and other maintenance fees. All of these revenue streams generate fee income through service charges for monthly account maintenance and similar items, transfer fees, late fees, overlimit fees, and stop payment fees. Revenue is recorded at the time of the transaction. Other income The following table presents the components of other income: Three Months Ended September 30, Nine Months Ended September 30, (Dollars in thousands) 2018 2017 2018 2017 Managed service fees $ 3,169 $ 2,894 $ 9,100 $ 8,184 Currency preparation 863 765 2,406 2,185 ATM insurance 586 715 1,781 2,131 Miscellaneous products and services 2,041 1,692 6,391 4,812 Total other income $ 6,659 $ 6,066 $ 19,678 $ 17,312 Other income consists of managed service fees, which are primarily courier fees related to cash management, currency preparation, ATM insurance and other miscellaneous products and services offered by the Bank. These fees are primarily generated through monthly billings or at the time of the transaction. Arrangements with multiple performance obligations Our contracts with customers may include multiple performance obligations. For such arrangements, we allocate revenue to each performance obligation based on its relative standalone selling price. We generally determine standalone selling prices based on the prices charged to customers. Practical expedients and exemptions We do not disclose the value of unsatisfied performance obligations for (i) contracts with an original expected length of one year or less and (ii) contracts for which we recognize revenue at the amount to which we have the right to invoice for services performed.

EARNINGS PER SHARE

EARNINGS PER SHARE	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
EARNINGS PER SHARE	3. EARNINGS PER SHARE The following table shows the computation of basic and diluted earnings per share: Three Months Ended September 30, Nine Months Ended September 30, (Dollars and shares in thousands, except per share data) 2018 2017 2018 2017 Numerator: Net income $ 38,935 $ 20,569 $ 105,025 $ 60,076 Denominator: Weighted average basic shares 31,800 31,420 31,599 31,424 Dilutive potential common shares 548 848 663 856 Weighted average fully diluted shares $ 32,348 $ 32,268 $ 32,262 $ 32,280 Earnings per share: Basic $ 1.22 $ 0.65 $ 3.32 $ 1.91 Diluted $ 1.20 $ 0.64 $ 3.26 $ 1.86 Outstanding common stock equivalents having no dilutive effect 11 — 16 5

INVESTMENT SECURITIES

INVESTMENT SECURITIES	9 Months Ended
	Sep. 30, 2018
Investments, Debt and Equity Securities [Abstract]
INVESTMENT SECURITIES	4. INVESTMENT SECURITIES The following tables detail the amortized cost and the estimated fair value of our investments in available-for-sale and held-to-maturity debt securities as well as our equity investments. None of our investments in debt securities are classified as trading. September 30, 2018 (Dollars in thousands) Amortized Cost Gross Unrealized Gain Gross Unrealized Loss Fair Value Available-for-Sale Debt Securities CMO $ 311,507 $ — $ 11,477 $ 300,030 FNMA MBS 571,686 — 22,948 548,738 FHLMC MBS 116,532 2 4,112 112,422 GNMA MBS 37,180 72 1,311 35,941 $ 1,036,905 $ 74 $ 39,848 $ 997,131 Held-to-Maturity Debt Securities (1) State and political subdivisions $ 152,577 $ 55 $ 2,049 $ 150,583 Equity Investments (2) Visa Class B shares $ 13,918 $ 17,865 $ — $ 31,783 Other equity investments 3,300 — — 3,300 $ 17,218 $ 17,865 $ — $ 35,083 (1) Held-to–maturity securities transferred from available-for-sale are included in held-to-maturity at fair value at the time of transfer. The amortized cost of held-to-maturity securities included net unrealized gains of $1.2 million at September 30, 2018 , related to securities transferred, which are offset in Accumulated other comprehensive loss, net of tax. (2) Equity investments are included in Other investments in the unaudited Consolidated Statements of Financial Condition. December 31, 2017 (Dollars in thousands) Amortized Cost Gross Gross Fair Available-for-Sale Debt Securities CMO $ 250,592 $ 88 $ 4,141 $ 246,539 FNMA MBS 479,218 941 6,172 473,987 FHLMC MBS 88,681 118 924 87,875 GNMA MBS 29,300 209 411 29,098 $ 847,791 $ 1,356 $ 11,648 $ 837,499 Held-to-Maturity Debt Securities (1) State and political subdivisions $ 161,186 $ 1,758 $ 91 $ 162,853 Equity Investments (2)(3) Other equity investments $ 643 $ — $ 20 $ 623 $ 643 $ — $ 20 $ 623 (1) Held-to–maturity securities transferred from available-for-sale are included in held-to-maturity at fair value at the time of transfer. The amortized cost of held-to-maturity securities included net unrealized gains of $1.6 million at December 31, 2017 , related to securities transferred, which are offset in Accumulated other comprehensive loss, net of tax. (2) Equity investments are included in Other investments in the unaudited Consolidated Statements of Financial Condition. (3) These municipal securities were sold during the second quarter of 2018. The scheduled maturities of our available-for-sale debt securities at September 30, 2018 and December 31, 2017 are presented in the table below: Available for Sale Amortized Fair (Dollars in thousands) Cost Value September 30, 2018 Within one year $ — $ — After one year but within five years 19,792 19,160 After five years but within ten years 170,009 159,754 After ten years 847,104 818,217 $ 1,036,905 $ 997,131 December 31, 2017 Within one year $ — $ — After one year but within five years 20,051 19,825 After five years but within ten years 179,812 175,583 After ten years 647,928 642,091 $ 847,791 $ 837,499 The scheduled maturities of our held-to-maturity debt securities at September 30, 2018 and December 31, 2017 are presented in the table below: Held to Maturity Amortized Fair (Dollars in thousands) Cost Value September 30, 2018 Within one year $ 1,027 $ 1,023 After one year but within five years 6,636 6,599 After five years but within ten years 29,148 28,902 After ten years 115,766 114,059 $ 152,577 $ 150,583 December 31, 2017 Within one year $ 322 $ 320 After one year but within five years 5,895 5,894 After five years but within ten years 18,751 18,873 After ten years 136,218 137,766 $ 161,186 $ 162,853 Mortgage-backed securities (MBS) may have expected maturities that differ from their contractual maturities. These differences arise because issuers may have the right to call securities and borrowers may have the right to prepay obligations with or without prepayment penalty. Investment securities with fair market values aggregating $972.8 million and $688.2 million were pledged as collateral for retail customer repurchase agreements, municipal deposits, and other obligations as of September 30, 2018 and December 31, 2017 , respectively. During the nine months ended September 30, 2018 , we sold $7.0 million of debt securities categorized as available for sale, resulting in realized gains of less than $0.1 million and no realized losses. During the nine months ended September 30, 2017 , we sold $415.5 million of debt securities categorized as available for sale, resulting in realized gains of $1.9 million and realized losses of less than $0.1 million . The cost basis of all debt securities sales is based on the specific identification method. During the nine months ended September 30, 2018 , we sold $6.2 million of equity securities, specifically Visa Class B shares, resulting in realized gains of $3.8 million and no realized losses. There were no such sales during the nine months ended September 30, 2017 . As of September 30, 2018 and December 31, 2017 , our debt securities portfolio had remaining unamortized premiums of $12.8 million and $14.1 million , respectively, and unaccreted discounts of $1.8 million and $1.3 million as of September 30, 2018 and December 31, 2017. For debt securities with unrealized losses, the table below shows our gross unrealized losses and fair value by investment category and length of time that individual debt securities were in a continuous unrealized loss position at September 30, 2018 . Duration of Unrealized Loss Position Less than 12 months 12 months or longer Total Fair Unrealized Fair Unrealized Fair Unrealized (Dollars in thousands) Value Loss Value Loss Value Loss Available-for-sale debt securities: CMO $ 138,346 $ 2,826 $ 161,684 $ 8,651 $ 300,030 $ 11,477 FNMA MBS 303,994 8,047 244,744 14,901 548,738 22,948 FHLMC MBS 55,386 1,271 52,514 2,841 107,900 4,112 GNMA MBS 19,329 504 13,419 807 32,748 1,311 Total temporarily impaired investments $ 517,055 $ 12,648 $ 472,361 $ 27,200 $ 989,416 $ 39,848 Held-to-maturity debt securities: State and political subdivisions $ 150,060 $ 2,013 $ 523 $ 36 $ 150,583 $ 2,049 Total temporarily impaired investments $ 150,060 $ 2,013 $ 523 $ 36 $ 150,583 $ 2,049 For debt investment securities with unrealized losses, the table below shows our gross unrealized losses and fair value by investment category and length of time that individual debt securities were in a continuous unrealized loss position at December 31, 2017 . Duration of Unrealized Loss Position Less than 12 months 12 months or longer Total Fair Unrealized Fair Unrealized Fair Unrealized (Dollars in thousands) Value Loss Value Loss Value Loss Available-for-sale debt securities: CMO $ 146,726 $ 1,820 $ 77,149 $ 2,321 $ 223,875 $ 4,141 FNMA MBS 204,921 1,479 126,342 4,693 331,263 6,172 FHLMC MBS 42,514 269 21,405 655 63,919 924 GNMA MBS 4,615 56 14,782 355 19,397 411 Total temporarily impaired investments $ 398,776 $ 3,624 $ 239,678 $ 8,024 $ 638,454 $ 11,648 Held-to-maturity debt securities: State and political subdivisions $ 23,404 $ 59 $ 5,625 $ 32 $ 29,029 $ 91 Total temporarily impaired investments $ 23,404 $ 59 $ 5,625 $ 32 $ 29,029 $ 91 Other equity investments $ — $ — $ 624 $ 20 $ 624 $ 20 At September 30, 2018 , we owned debt securities totaling $1.1 billion for which the amortized cost basis exceeded fair value. Total unrealized losses on these securities were $41.9 million at September 30, 2018 . The temporary impairment is the result of changes in market interest rates subsequent to purchase. Our investment portfolio is reviewed each quarter for indications of OTTI. This review includes analyzing the length of time and the extent to which the fair value has been lower than the amortized cost, the financial condition and near-term prospects of the issuer, including any specific events which may influence the operations of the issuer and our intent and ability to hold the investment for a period of time sufficient to allow for full recovery of the unrealized loss. We evaluate our intent and ability to hold debt securities based upon our investment strategy for the particular type of security and our cash flow needs, liquidity position, capital adequacy and interest rate risk position. We do not have the intent to sell, nor is it more likely-than-not we will be required to sell these securities before we are able to recover the amortized cost basis. All debt securities, with the exception of one having a fair value of $0.6 million at September 30, 2018 , were AA-rated or better at the time of purchase and remained investment grade at September 30, 2018 . All securities were evaluated for OTTI at September 30, 2018 and December 31, 2017 . The result of this evaluation showed no OTTI as of September 30, 2018 or December 31, 2017 . The estimated weighted average duration of MBS was 5.6 years at September 30, 2018 .

LOANS

LOANS	9 Months Ended
	Sep. 30, 2018
Receivables [Abstract]
LOANS	5. LOANS The following table shows our loan portfolio by category: (Dollars in thousands) September 30, 2018 December 31, 2017 Commercial and industrial $ 1,506,675 $ 1,464,554 Owner-occupied commercial 1,085,404 1,079,247 Commercial mortgages 1,133,281 1,187,705 Construction 333,487 281,608 Residential (1) 223,308 253,301 Consumer 653,704 558,493 4,935,859 4,824,908 Less: Deferred fees, net 7,911 7,991 Allowance for loan losses 41,812 40,599 Net loans $ 4,886,136 $ 4,776,318 (1) Includes reverse mortgages at fair value of $16.6 million at September 30, 2018 and $19.8 million at December 31, 2017 . The following table shows the outstanding principal balance and carrying amounts for acquired credit impaired loans for which the Company applies ASC 310-30 as of the dates indicated: (Dollars in thousands) September 30, 2018 December 31, 2017 Outstanding principal balance $ 21,534 $ 27,034 Carrying amount 17,264 21,295 Allowance for loan losses 229 358 The following table presents the changes in accretable yield on the acquired credit impaired loans for the nine months ended September 30, 2018 : Three Months Ended September 30, Nine Months Ended September 30, (Dollars in thousands) 2018 2017 2018 2017 Balance at beginning of period $ 2,925 $ 4,603 $ 3,035 $ 5,150 Accretion (433 ) (583 ) (1,351 ) (2,158 ) Reclassification from nonaccretable difference 2 3 1,080 1,246 Additions/adjustments (52 ) (878 ) (322 ) (1,089 ) Disposals — (341 ) — (345 ) Balance at end of period $ 2,442 $ 2,804 $ 2,442 $ 2,804

ALLOWANCE FOR LOAN LOSSES AND C

ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY INFORMATION	9 Months Ended
	Sep. 30, 2018
Receivables [Abstract]
ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY INFORMATION	6. ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY INFORMATION Allowance for Loan Losses We maintain an allowance for loan losses which represents our best estimate of probable losses in our loan portfolio. As losses are realized, they are charged to this allowance. We established our allowance in accordance with guidance provided in the SEC’s Staff Accounting Bulletin 102 (SAB 102), Selected Loan Loss Allowance Methodology and Documentation Issues, ASC 450, Contingencies and ASC 310, Receivables . When we have reason to believe it is probable that we will not be able to collect all contractually due amounts of principal and interest, loans are evaluated for impairment on an individual basis and a specific allocation of the allowance is assigned in accordance with ASC 310-10. We also maintain an allowance for loan losses on acquired loans when: (i) for loans accounted for under ASC 310-30, there is deterioration in credit quality subsequent to acquisition and (ii) for loans accounted for under ASC 310-20, the inherent losses in the loans exceed the remaining credit discount recorded at the time of acquisition. The determination of the allowance for loan losses requires significant judgment reflecting our best estimate of impairment related to specifically identified impaired loans as well as probable loan losses in the remaining loan portfolio. Our evaluation is based on a continuing review of these portfolios. The following are included in our allowance for loan losses: • Specific reserves for impaired loans • An allowance for each pool of homogenous loans based on historical loss experience • Adjustments for qualitative and environmental factors allocated to pools of homogenous loans When it is probable that the Bank will be unable to collect all amounts due (interest and principal) in accordance with the contractual terms of the loan agreement, it assigns a specific reserve to that loan, as necessary. Unless loans are well-secured and collection is imminent, loans greater than 90 days past due are deemed impaired and their respective reserves are generally charged off once the loss has been confirmed. Estimated specific reserves are based on collateral values, estimates of future cash flows or market valuations. We charge loans off when they are deemed to be uncollectible. During the nine months ended September 30, 2018 and 2017 , net charge-offs totaled $8.7 million , or 0.24% , of average loans annualized, and $6.5 million , or 0.19% , of average loans annualized, respectively. Allowances for pooled homogeneous loans, that are not deemed impaired, are based on historical net loss experience. Estimated losses for pooled portfolios are determined differently for commercial loan pools and retail loan pools. Commercial loans are pooled as follows: commercial, owner-occupied commercial, commercial mortgages and construction. Each pool is further segmented by internally assessed risk ratings. Loan losses for commercial loans are estimated by determining the probability of default and expected loss severity upon default. The probability of default is calculated based on the historical rate of migration to impaired status during the last 31 quarters. During the third quarter of 2018 , we increased the look-back period to 31 quarters from the 28 quarters used at December 31, 2017 . This increase in the look-back period allows us to continue to anchor to the fourth quarter of 2010 to ensure that the quantitative reserves calculated by the allowance for loan loss model are adequately considering the losses within a full credit cycle. Loss severity upon default is calculated as the actual loan losses (net of recoveries) on impaired loans in their respective pool during the same time frame. Retail loans are pooled into the following segments: residential mortgage, consumer secured and consumer unsecured loans. Pooled reserves for retail loans are calculated based solely on average net loss rates over the same 31 quarter look-back period. Qualitative adjustment factors consider various current internal and external conditions which are allocated among loan types and take into consideration: • Current underwriting policies, staff, and portfolio mix, • Internal trends of delinquency, nonaccrual and criticized loans by segment, • Risk rating accuracy, control and regulatory assessments/environment, • General economic conditions - locally and nationally, • Market trends impacting collateral values, and • The competitive environment, as it could impact loan structure and underwriting. The above factors are based on their relative standing compared to the period in which historic losses are used in quantitative reserve estimates and current directional trends. Qualitative factors in our model can add to or subtract from quantitative reserves. The allowance methodology uses a loss emergence period (LEP), which is the period of time between an event that triggers the probability of a loss and the confirmation of the loss. We estimate the commercial LEP to be approximately nine quarters as of September 30, 2018 . Our residential mortgage and consumer LEP remained at four quarters as of September 30, 2018 . We evaluate LEP quarterly for reasonableness and complete a detailed historical analysis of our LEP annually for our commercial portfolio and review the current four quarter LEP for the retail portfolio to determine the continued reasonableness of this assumption. Our loan officers and risk managers meet at least quarterly to discuss and review the conditions and risks associated with individual problem loans. In addition, various regulatory agencies periodically review our loan ratings and allowance for loan losses and the Bank’s internal loan review department performs loan reviews. The following tables provide the activity of our allowance for loan losses and loan balances for the three and nine months ended September 30, 2018 : (Dollars in thousands) Commercial Owner-occupied Commercial Commercial Mortgages Construction Residential (1) Consumer Total Three months ended September 30, 2018 Allowance for loan losses Beginning balance $ 15,842 $ 5,284 $ 6,951 $ 3,289 $ 1,519 $ 8,152 $ 41,037 Charge-offs (1,761 ) — — (1,475 ) — (567 ) (3,803 ) Recoveries 621 16 52 1 28 144 862 Provision (credit) 1,947 273 (598 ) 1,657 (71 ) 626 3,834 Provision (credit) for acquired loans (82 ) — (21 ) — (1 ) (14 ) (118 ) Ending balance $ 16,567 $ 5,573 $ 6,384 $ 3,472 $ 1,475 $ 8,341 $ 41,812 Nine months ended September 30, 2018 Allowance for loan losses Beginning balance $ 16,732 $ 5,422 $ 5,891 $ 2,861 $ 1,798 $ 7,895 $ 40,599 Charge-offs (6,861 ) (351 ) (48 ) (1,475 ) (54 ) (1,857 ) (10,646 ) Recoveries 1,060 28 189 3 117 598 1,995 Provision (credit) 5,730 419 356 2,106 (382 ) 1,711 9,940 Provision (credit) for acquired loans (94 ) 55 (4 ) (23 ) (4 ) (6 ) (76 ) Ending balance $ 16,567 $ 5,573 $ 6,384 $ 3,472 $ 1,475 $ 8,341 $ 41,812 Period-end allowance allocated to: Loans individually evaluated for impairment $ 3,970 $ 9 $ — $ 444 $ 570 $ 171 $ 5,164 Loans collectively evaluated for impairment 12,517 5,546 6,300 3,019 870 8,167 36,419 Acquired loans evaluated for impairment 80 18 84 9 35 3 229 Ending balance $ 16,567 $ 5,573 $ 6,384 $ 3,472 $ 1,475 $ 8,341 $ 41,812 Period-end loan balances: Loans individually evaluated for impairment (2) $ 19,910 $ 2,829 $ 6,502 $ 2,903 $ 11,479 $ 8,256 $ 51,879 Loans collectively evaluated for impairment 1,387,143 958,356 961,345 322,822 134,074 620,727 4,384,467 Acquired nonimpaired loans 97,552 119,403 156,483 7,025 60,407 24,568 465,438 Acquired impaired loans 2,070 4,816 8,951 737 766 153 17,493 Ending balance (3) $ 1,506,675 $ 1,085,404 $ 1,133,281 $ 333,487 $ 206,726 $ 653,704 $ 4,919,277 (1) Period-end loan balance excludes reverse mortgages at fair value of $16.6 million . (2) The difference between this amount and nonaccruing loans represents accruing troubled debt restructured loans of $15.2 million for the period ending September 30, 2018 . Accruing troubled debt restructured loans are considered impaired loans. (3) Ending loan balances do not include net deferred fees. The following table provides the activity of the allowance for loan losses and loan balances for the three and nine months ended September 30, 2017 : (Dollars in thousands) Commercial Owner - occupied Commercial Commercial Mortgages Construction Residential (1) Consumer Total Three months ended September 30, 2017 Allowance for loan losses Beginning balance $ 14,224 $ 5,816 $ 7,335 $ 3,432 $ 2,050 $ 7,148 $ 40,005 Charge-offs (1,603 ) (104 ) (1,196 ) (215 ) (59 ) (575 ) (3,752 ) Recoveries 417 12 16 301 11 295 1,052 Provision (credit) 2,128 (96 ) (231 ) 427 (49 ) 644 2,823 Provision for acquired loans (7 ) 104 (5 ) (28 ) 9 — 73 Ending balance $ 15,159 $ 5,732 $ 5,919 $ 3,917 $ 1,962 $ 7,512 $ 40,201 Nine months ended September 30, 2017 Allowance for loan losses Beginning balance $ 13,339 $ 6,588 $ 8,915 $ 2,838 $ 2,059 $ 6,012 $ 39,751 Charge-offs (3,787 ) (296 ) (1,702 ) (346 ) (112 ) (2,606 ) (8,849 ) Recoveries 820 120 69 305 141 943 2,398 Provision (credit) 4,597 (802 ) (1,602 ) 1,056 (146 ) 3,177 6,280 Provision for acquired loans 190 122 239 64 20 (14 ) 621 Ending balance $ 15,159 $ 5,732 $ 5,919 $ 3,917 $ 1,962 $ 7,512 $ 40,201 Period-end allowance allocated to: Loans individually evaluated for impairment $ 1,220 $ — $ 131 $ — $ 858 $ 198 $ 2,407 Loans collectively evaluated for impairment 13,646 5,699 5,638 3,881 1,078 7,310 37,252 Acquired loans evaluated for impairment 293 33 150 36 26 4 542 Ending balance $ 15,159 $ 5,732 $ 5,919 $ 3,917 $ 1,962 $ 7,512 $ 40,201 Period-end loan balances: Loans individually evaluated for impairment (2) $ 12,845 $ 3,346 $ 9,012 $ 1,839 $ 14,060 $ 7,409 $ 48,511 Loans collectively evaluated for impairment 1,249,027 941,296 943,699 271,447 148,715 472,488 4,026,672 Acquired nonimpaired loans 120,987 144,710 194,394 19,085 77,154 40,136 596,466 Acquired impaired loans 5,235 7,401 9,969 946 788 243 24,582 Ending balance (3) $ 1,388,094 $ 1,096,753 $ 1,157,074 $ 293,317 $ 240,717 $ 520,276 $ 4,696,231 (1) Period-end loan balance excludes reverse mortgages at fair value of $21.4 million . (2) The difference between this amount and nonaccruing loans represents accruing troubled debt restructured loans of $14.9 million for the period ending September 30, 2017 . Accruing troubled debt restructured loans are considered impaired loans. (3) Ending loan balances do not include net deferred fees. Nonaccrual and Past Due Loans Nonaccruing loans are those on which the accrual of interest has ceased. Typically, we discontinue accrual of interest on originated loans after payments become more than 90 days past due or earlier if we do not expect the full collection of principal or interest in accordance with the terms of the loan agreement. Interest accrued but not collected at the date a loan is placed on nonaccrual status is reversed and charged against interest income. In addition, the accretion of net deferred loan fees and amortization of net deferred loan costs is suspended when a loan is placed on nonaccrual status. Subsequent cash receipts are applied either to the outstanding principal balance or recorded as interest income, depending on our assessment of the ultimate collectability of principal and interest. Loans greater than 90 days past due and still accruing are defined as loans contractually past due 90 days or more as to principal or interest payments, but which remain in accrual status because they are considered well secured and are in the process of collection. The following tables show our nonaccrual and past due loans at the dates indicated: September 30, 2018 (Dollars in thousands) 30–59 Days Past Due and Still Accruing 60–89 Days Past Due and Still Accruing Greater Than 90 Days Past Due and Still Accruing Total Past Due And Still Accruing Accruing Current Balances Acquired Impaired Loans Nonaccrual Loans Total Loans Commercial $ 1,324 $ 144 $ 2 $ 1,470 $ 1,484,007 $ 2,070 $ 19,128 $ 1,506,675 Owner-occupied commercial 1,526 782 — 2,308 1,075,451 4,816 2,829 1,085,404 Commercial mortgages 674 263 — 937 1,117,184 8,951 6,209 1,133,281 Construction — — — — 329,847 737 2,903 333,487 Residential (1) 2,336 879 24 3,239 199,456 766 3,265 206,726 Consumer 612 174 185 971 650,226 153 2,354 653,704 Total (2) $ 6,472 $ 2,242 $ 211 $ 8,925 $ 4,856,171 $ 17,493 $ 36,688 $ 4,919,277 % of Total Loans 0.13 % 0.05 % — % 0.18 % 98.72 % 0.36 % 0.75 % 100 % (1) Residential accruing current balances excludes reverse mortgages at fair value of $16.6 million . (2) The balances above include a total of $465.4 million acquired non-impaired loans. December 31, 2017 (Dollars in thousands) 30–59 Days Past Due and Still Accruing 60–89 Days Past Due and Still Accruing Greater Total Past Accruing Current Balances Acquired Impaired Loans Nonaccrual Loans Total Loans Commercial $ 1,050 $ — $ — $ 1,050 $ 1,440,291 $ 4,156 $ 19,057 $ 1,464,554 Owner-occupied commercial 2,069 233 — 2,302 1,067,488 5,803 3,654 1,079,247 Commercial mortgages 320 90 — 410 1,171,701 9,724 5,870 1,187,705 Construction — — — — 278,864 940 1,804 281,608 Residential (1) 2,058 731 356 3,145 225,434 784 4,124 233,487 Consumer 1,117 463 105 1,685 554,634 247 1,927 558,493 Total (2) $ 6,614 $ 1,517 $ 461 $ 8,592 $ 4,738,412 $ 21,654 $ 36,436 $ 4,805,094 % of Total Loans 0.14 % 0.03 % 0.01 % 0.18 % 98.61 % 0.45 % 0.76 % 100 % (1) Residential accruing current balances excludes reverse mortgages, at fair value of $19.8 million . (2) The balances above include a total of $565.5 million acquired non-impaired loans. Impaired Loans Loans for which it is probable we will not collect all principal and interest due according to their contractual terms, which is assessed based on the credit characteristics of the loan and/or payment status, are measured for impairment in accordance with the provisions of SAB 102 and ASC 310. The amount of impairment is required to be measured using one of three methods: (1) the present value of expected future cash flows discounted at the loan’s effective interest rate; (2) the fair value of collateral, if the loan is collateral dependent or (3) the loan’s observable market price. If the measure of the impaired loan is less than the recorded investment in the loan, a related allowance is allocated for the impairment. The following tables provide an analysis of our impaired loans at September 30, 2018 and December 31, 2017 : September 30, 2018 (Dollars in thousands) Ending Loan Balances Loans with No Related Reserve (1) Loans with Related Reserve Related Reserve Contractual Principal Balances Average Loan Balances Commercial $ 20,211 $ 8,713 $ 11,498 $ 4,050 $ 23,609 $ 18,479 Owner-occupied commercial 4,502 2,553 1,949 27 4,766 5,099 Commercial mortgages 8,114 6,502 1,612 84 16,816 8,740 Construction 3,132 122 3,010 453 5,171 4,808 Residential 11,690 7,509 4,181 605 14,109 13,249 Consumer 8,289 7,264 1,025 174 9,015 7,862 Total (2) $ 55,938 $ 32,663 $ 23,275 $ 5,393 $ 73,486 $ 58,237 (1) Reflects loan balances at or written down to their remaining book balance. (2) The above includes acquired impaired loans totaling $4.1 million in the ending loan balance and $4.5 million in the contractual principal balance. December 31, 2017 (Dollars in thousands) Ending Loan Balances Loans with No Related (1) Loans with Related Reserve Related Reserve Contractual Principal Balances Average Loan Balances Commercial $ 20,842 $ 3,422 $ 17,420 $ 3,861 $ 23,815 $ 15,072 Owner-occupied commercial 5,374 3,654 1,720 12 5,717 5,827 Commercial mortgages 7,598 4,487 3,111 112 16,658 12,630 Construction 6,292 6,023 269 33 6,800 4,523 Residential 14,181 8,282 5,899 796 17,015 14,533 Consumer 7,819 6,304 1,515 203 8,977 8,158 Total (2) $ 62,106 $ 32,172 $ 29,934 $ 5,017 $ 78,982 $ 60,743 (1) Reflects loan balances at or written down to their remaining book balance. (2) The above includes acquired impaired loans totaling $5.8 million in the ending loan balance and $6.8 million in the contractual principal balance. Interest income of $0.6 million and $1.3 million was recognized on impaired loans during the three and nine months ended September 30, 2018 , respectively. Interest income of $0.3 million and $1.0 million was recognized on impaired loans during the three and nine months ended September 30, 2017 , respectively. As of September 30, 2018 , there were 27 residential loans and eight commercial loans in the process of foreclosure. The total outstanding balance on these loans was $2.1 million and $5.6 million , respectively. As of December 31, 2017 , there were 33 residential loans and 8 commercial loans in the process of foreclosure. The total outstanding balance on the loans was $2.9 million and $6.0 million , respectively. Reserves on Acquired Nonimpaired Loans In accordance with ASC 310, loans acquired by the Bank through its mergers with First National Bank of Wyoming, Alliance Bancorp, Inc. (Alliance) and Penn Liberty Bank (Penn Liberty) are reflected on the balance sheet at their fair values on the date of acquisition as opposed to their contractual values. Therefore, on the date of acquisition establishing an allowance for acquired loans is prohibited. After the acquisition date, the Bank performs a separate allowance analysis on a quarterly basis to determine if an allowance for loan loss is necessary. Should the credit risk calculated exceed the purchased loan portfolio’s remaining credit mark, additional reserves will be added to the Bank’s allowance. When a purchased loan becomes impaired after its acquisition, it is evaluated as part of the Bank’s reserve analysis and a specific reserve is established to be included in the Bank’s allowance. Credit Quality Indicators Below is a description of each of our risk ratings for all commercial loans: • Pass . These borrowers currently show no indication of deterioration or potential problems and their loans are considered fully collectible. • Special Mention. Borrowers have potential weaknesses that deserve management’s close attention. Borrowers in this category may be experiencing adverse operating trends, for example, declining revenues or margins, high leverage, tight liquidity, or increasing inventory without increasing sales. These adverse trends can have a potential negative effect on the borrower’s repayment capacity. These assets are not adversely classified and do not expose the Bank to significant risk that would warrant a more severe rating. Borrowers in this category may also be experiencing significant management problems, pending litigation, or other structural credit weaknesses. • Substandard . Borrowers have well-defined weaknesses that require extensive oversight by management. Borrowers in this category may exhibit one or more of the following: inadequate debt service coverage, unprofitable operations, insufficient liquidity, high leverage, and weak or inadequate capitalization. Relationships in this category are not adequately protected by the sound financial worth and paying capacity of the obligor or the collateral pledged on the loan, if any. A distinct possibility exists that the Bank will sustain some loss if the deficiencies are not corrected. • Doubtful . Borrowers have well-defined weaknesses inherent in the Substandard category with the added characteristic that the possibility of loss is extremely high. Current circumstances in the credit relationship make collection or liquidation in full highly questionable. A doubtful asset has some pending event that may strengthen the asset that defers the loss classification. Such impending events include: perfecting liens on additional collateral, obtaining collateral valuations, an acquisition or liquidation preceding, proposed merger, or refinancing plan. • Loss . Loans are uncollectible or of such negligible value that continuance as a bankable asset is not supportable. This classification does not mean that the asset has absolutely no recovery or salvage value, but rather it is not practical to defer writing off this asset even though partial recovery may be recognized sometime in the future. Residential and Consumer Loans The residential and consumer loan portfolios are monitored on an ongoing basis using delinquency information and loan type as credit quality indicators. These credit quality indicators are assessed in the aggregate in these relatively homogeneous portfolios. Loans that are greater than 90 days past due are generally considered nonperforming and placed on nonaccrual status. The following tables provide an analysis of loans by portfolio segment based on the credit quality indicators used to determine the Allowance for Loan Loss. Commercial Credit Exposure September 30, 2018 Commercial and Industrial Owner-occupied Commercial Commercial Mortgages Construction Total Commercial (1) (Dollars in thousands) Amount % Risk Rating: Special mention $ 21,315 $ 32,123 $ 10,806 $ — $ 64,244 Substandard: Accrual 17,247 24,662 1,546 169 43,624 Nonaccrual 15,158 2,820 6,209 2,460 26,647 Doubtful 3,970 9 — 444 4,423 Total Special Mention and Substandard 57,690 59,614 18,561 3,073 138,938 3 % Acquired impaired 2,070 4,816 8,951 737 16,574 1 % Pass 1,446,915 1,020,974 1,105,769 329,677 3,903,335 96 % Total $ 1,506,675 $ 1,085,404 $ 1,133,281 $ 333,487 $ 4,058,847 100 % (1) Table includes $380.5 million of acquired non-impaired loans as of September 30, 2018 . December 31, 2017 Commercial and Industrial Owner-occupied Commercial Commercial Mortgages Construction Total Commercial (1) (Dollars in thousands) Amount % Risk Rating: Special mention $ 22,789 $ 16,783 $ — $ — $ 39,572 Substandard: Accrual 34,332 19,386 1,967 4,965 60,650 Nonaccrual 15,370 3,654 5,852 1,804 26,680 Doubtful 3,687 — 18 — 3,705 Total Special Mention and Substandard 76,178 39,823 7,837 6,769 130,607 3 % Acquired impaired 4,156 5,803 9,724 940 20,623 1 % Pass 1,384,220 1,033,621 1,170,144 273,899 3,861,884 96 % Total $ 1,464,554 $ 1,079,247 $ 1,187,705 $ 281,608 $ 4,013,114 100 % (1) Table includes $457.3 million of acquired non-impaired loans as of December 31, 2017 . Residential and Consumer Credit Exposure Residential (2) Consumer Total Residential and Consumer (3) September 30, December 31, September 30, December 31, September 30, 2018 December 31, 2017 (Dollars in thousands) 2018 2017 2018 2017 Amount Percent Amount Percent Nonperforming (1) $ 11,479 $ 13,778 $ 8,256 $ 7,588 $ 19,735 2 % $ 21,366 3 % Acquired impaired loans 766 784 153 247 919 — % 1,031 — % Performing 194,481 218,925 645,295 550,658 839,776 98 % 769,583 97 % Total $ 206,726 $ 233,487 $ 653,704 $ 558,493 $ 860,430 100 % $ 791,980 100 % (1) Includes $14.1 million as of September 30, 2018 and $15.3 million as of December 31, 2017 of troubled debt restructured mortgages and home equity installment loans that are performing in accordance with the loans’ modified terms and are accruing interest. (2) Residential performing loans excludes $16.6 million and $19.8 million of reverse mortgages at fair value as of September 30, 2018 and December 31, 2017 , respectively. (3) Total includes $85.0 million and $108.2 million in acquired non-impaired loans as of September 30, 2018 and December 31, 2017 , respectively. Troubled Debt Restructurings (TDRs) TDRs are recorded in accordance with ASC 310-40, Troubled Debt Restructuring by Creditors . The following table presents the balance of TDRs as of the indicated dates: (Dollars in thousands) September 30, 2018 December 31, 2017 Performing TDRs $ 15,192 $ 20,061 Nonperforming TDRs 14,604 9,627 Total TDRs $ 29,796 $ 29,688 Approximately $2.0 million and $1.0 million in related reserves have been established for these loans at September 30, 2018 and December 31, 2017 , respectively. The following table presents information regarding the types of loan modifications made for the nine months ended September 30, 2018 and 2017: September 30, 2018 September 30, 2017 Contractual payment reduction and term extension Maturity Date Extension Discharged in bankruptcy Other (1) Total Contractual payment reduction and term extension Maturity Date Extension Discharged in bankruptcy Other (1) Total Commercial 6 — — — 6 1 1 — — 2 Owner-occupied commercial — — — — — — 1 — — 1 Commercial Mortgages 2 1 — — 3 — — — — — Construction — 1 — — 1 — 2 — 1 3 Residential 4 — — — 4 2 — 3 — 5 Consumer 8 1 4 2 15 1 — 11 6 18 Total 20 3 4 2 29 4 4 14 7 29 (1) Other includes underwriting exceptions. Principal balances are generally not forgiven when a loan is modified as a TDR. Nonaccruing restructured loans remain in nonaccrual status until there has been a period of sustained repayment performance, which is typically six months , and payment is reasonably assured. The following table presents loans identified as TDRs during the three and nine months ended September 30, 2018 and 2017 . Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (Dollars in thousands) Pre Modification Post Modification Pre Modification Post Modification Pre Modification Post Modification Pre Modification Post Modification Commercial $ 320 $ 320 $ — $ — $ 5,102 $ 5,102 $ 781 $ 781 Owner-occupied commercial — — — — — — 3,071 3,071 Commercial mortgages 168 168 — — 2,190 2,190 — — Construction — — — — 920 920 1,836 1,836 Residential — — 1,058 1,058 469 469 1,300 1,300 Consumer 113 113 609 609 1,236 1,236 1,867 1,867 Total $ 601 $ 601 $ 1,667 $ 1,667 $ 9,917 $ 9,917 $ 8,855 $ 8,855 During the nine months ended September 30, 2018 , the TDRs set forth in the table above resulted in a $0.7 million decrease in our allowance for loan losses and $0.1 million of additional charge-offs. For the same period of 2017 , the TDRs set forth in the table resulted in no increase in our allowance for loan losses, and resulted in no additional charge-offs. During the three months ended September 30, 2018 , five TDRs defaulted that had received troubled debt modification during the past twelve months with a total loan amount of $0.5 million . During the three months ended September 30, 2017 , four TDRs defaulted that had received troubled debt modification during the past twelve months with a total loan amount of $3.7 million .

DEPOSITS

DEPOSITS	9 Months Ended
	Sep. 30, 2018
Banking and Thrift [Abstract]
DEPOSITS	7. DEPOSITS The following table shows our deposits by category: (Dollars in thousands) September 30, 2018 December 31, 2017 Noninterest-bearing: Noninterest demand $ 1,515,336 $ 1,420,760 Total noninterest-bearing $ 1,515,336 $ 1,420,760 Interest-bearing: Interest-bearing demand $ 1,091,546 $ 1,071,512 Savings 535,344 549,744 Money market 1,581,684 1,347,146 Customer time deposits 712,859 629,071 Brokered deposits 287,147 229,371 Total interest-bearing 4,208,580 3,826,844 Total deposits $ 5,723,916 $ 5,247,604

ASSOCIATE BENEFIT PLANS

ASSOCIATE BENEFIT PLANS	9 Months Ended
	Sep. 30, 2018
Postemployment Benefits [Abstract]
ASSOCIATE BENEFIT PLANS	8. ASSOCIATE BENEFIT PLANS Postretirement Medical Benefits We share certain costs of providing health and life insurance benefits to eligible retired Associates (employees) and their eligible dependents. Previously, all Associates were eligible for these benefits if they reached normal retirement age while working for us. Effective March 31, 2014, we changed the eligibility of this plan to include only those Associates who have achieved ten years of service with us as of March 31, 2014. As of December 31, 2014, we began to use the mortality table issued by the Office of the Actuary of the U.S. Bureau of Census in our calculation. We account for our obligations under the provisions of FASB ASC 715, Compensation - Retirement Benefits (ASC 715). ASC 715 requires that we recognize the costs of these benefits over an Associate’s active working career. Amortization of unrecognized net gains or losses resulting from experience different from that assumed and from changes in assumptions is included as a component of net periodic benefit cost over the remaining service period of active employees to the extent that such gains and losses exceed 10% of the accumulated postretirement benefit obligation, as of the beginning of the year. We recognize our net periodic benefit cost in Salaries, benefits and other compensation in our unaudited Consolidated Statements of Income. The following table presents the components of net periodic benefit cost related to our postretirement medical benefits plan measured at January 1, 2018 and 2017. Three months ended September 30, Nine months ended September 30, (Dollars in thousands) 2018 2017 2018 2017 Service cost $ 15 $ 11 $ 45 $ 40 Interest cost 18 16 53 54 Prior service cost amortization (19 ) (19 ) (57 ) (57 ) Net gain recognition (11 ) (18 ) (34 ) (52 ) Net periodic benefit cost $ 3 $ (10 ) $ 7 $ (15 ) Alliance Associate Pension Plan During the fourth quarter of 2015, we completed the acquisition of Alliance and its wholly owned subsidiary, Alliance Bank, headquartered in Broomall, Pennsylvania. At the time of the acquisition, we assumed the Alliance pension plan offered to its current associates. The following table presents the components of net periodic benefit cost related to the Alliance Associate Pension Plan measured at January 1, 2018 and 2017. Three months ended September 30, Nine months ended September 30, (Dollars in thousands) 2018 2017 2018 2017 Service cost $ 10 $ 10 $ 30 $ 30 Interest cost 75 75 222 225 Expected return on plan assets (138 ) (135 ) (410 ) (405 ) Prior service cost amortization — — — — Net gain recognition — — — — Net periodic benefit cost $ (53 ) $ (50 ) $ (158 ) $ (150 )

INCOME TAXES

INCOME TAXES	9 Months Ended
	Sep. 30, 2018
Income Tax Disclosure [Abstract]
INCOME TAXES	9. INCOME TAXES We account for income taxes in accordance with FASB ASC 740, Income Taxes (ASC 740). ASC 740 requires the recording of deferred income taxes that reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. We exercise significant judgment in the evaluation of the amount and timing of the recognition of the resulting tax assets and liabilities. The judgments and estimates required for the evaluation are updated based on changes in business factors and the tax laws. If actual results differ from the assumptions and other considerations used in estimating the amount and timing of tax recognized, there can be no assurance that additional expenses will not be required in future periods. ASC 740 prescribes a minimum probability threshold that a tax position must meet before a financial statement benefit is recognized. We recognize, when applicable, interest and penalties related to unrecognized tax benefits in the provision for income taxes in the financial statements. Assessment of uncertain tax positions under ASC 740 requires careful consideration of the technical merits of a position based on our analysis of tax regulations and interpretations. We have recorded certain items to account for the tax effects of the Tax Cuts and Jobs Act, enacted on December 22, 2017, which among other items, lowered the corporate income tax rate from 35% to 21%. During the quarter ended September 30, 2018, we recorded certain tax provision to tax return true-up adjustments associated with items that were finalized as part of our 2017 tax return filing during the quarter. We recorded a $0.9 million tax benefit in the quarter, primarily for deferred tax temporary difference items that were claimed on the 2017 tax return at a 35% federal tax rate that were recorded at December 31, 2017 as anticipating to be deducted at a 21% federal tax rate. There are no remaining provisional items as of September 30, 2018. There were no unrecognized tax benefits as of September 30, 2018 . We record interest and penalties on potential income tax deficiencies as income tax expense. Our federal and state tax returns for the 2015 through 2017 tax years are subject to examination as of September 30, 2018 . We do not expect to record or realize any material unrecognized tax benefits during 2018 . As a result of the adoption of ASU No. 2014-01, Investments-Equity Method and Joint Ventures: Accounting for Investments in Qualified Affordable Housing Projects , the amortization of our low-income housing credit investments has been reflected as income tax expense. Accordingly, $0.5 million and $0.4 million of such amortization has been reflected as income tax expense for the three months ended September 30, 2018 and 2017, respectively, and $1.4 million and $1.2 million of such amortization has been reflected as income tax expense for the nine months ended September 30, 2018 and September 30, 2017, respectively. The amount of affordable housing tax credits, amortization and tax benefits recorded as income tax expense for the nine months ended September 30, 2018 were $1.3 million , $1.4 million and $0.2 million , respectively. The carrying value of the investment in affordable housing credits is $12.3 million at September 30, 2018 , compared to $13.8 million at December 31, 2017 .

FAIR VALUE DISCLOSURES OF FINAN

FAIR VALUE DISCLOSURES OF FINANCIAL ASSETS AND LIABILITIES	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
FAIR VALUE DISCLOSURES OF FINANCIAL ASSETS AND LIABILITIES	10. FAIR VALUE DISCLOSURES OF FINANCIAL ASSETS AND LIABILITIES FAIR VALUE OF FINANCIAL ASSETS AND LIABILITIES ASC 820-10 defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. ASC 820-10 establishes a fair value hierarchy that prioritizes the use of inputs used in valuation methodologies into the following three levels: • Level 1: Inputs to the valuation methodology are quoted prices, unadjusted, for identical assets or liabilities in active markets. 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: Inputs to the valuation methodology include quoted prices for similar assets or liabilities in active markets; inputs to the valuation methodology include quoted prices for identical or similar assets or liabilities in markets that are not active; or inputs to the valuation methodology that are derived principally from or can be corroborated by observable market data by correlation or other means. • Level 3: Inputs to the valuation methodology are unobservable and significant to the fair value measurement. Level 3 assets and liabilities include financial instruments whose value is determined using discounted cash flow methodologies, as well as instruments for which the determination of fair value requires significant management judgment or estimation. The following tables present financial instruments carried at fair value as of September 30, 2018 and December 31, 2017 by level in the valuation hierarchy (as described above): September 30, 2018 (Dollars in thousands) Quoted Prices in Active Markets for Identical Asset (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Fair Value Assets measured at fair value on a recurring basis: Available-for-sale securities: CMO $ — $ 300,030 $ — $ 300,030 FNMA MBS — 548,738 — 548,738 FHLMC MBS — 112,422 — 112,422 GNMA MBS — 35,941 — 35,941 Other assets — 977 — 977 Total assets measured at fair value on a recurring basis $ — $ 998,108 $ — $ 998,108 Liabilities measured at fair value on a recurring basis: Other liabilities $ — $ 4,781 $ — $ 4,781 Assets measured at fair value on a nonrecurring basis: Other investments (1) $ — $ — $ 35,083 $ 35,083 Other real estate owned — — 2,004 2,004 Loans held for sale — 35,855 — 35,855 Impaired loans, net — — 50,545 50,545 Total assets measured at fair value on a nonrecurring basis $ — $ 35,855 $ 87,632 $ 123,487 (1) See Note 1 for additional disclosures resulting from the Company's adoption of ASU 2016-01. December 31, 2017 (Dollars in thousands) Quoted Prices in Active Markets for Identical Asset (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Fair Value Assets measured at fair value on a recurring basis: Available-for-sale securities: CMO $ — $ 246,539 $ — $ 246,539 FNMA MBS — 473,987 — 473,987 FHLMC MBS — 87,875 — 87,875 GNMA MBS — 29,098 — 29,098 Other investments 623 — — 623 Other assets — 747 — 747 Total assets measured at fair value on a recurring basis $ 623 $ 838,246 $ — $ 838,869 Liabilities measured at fair value on a recurring basis: Other liabilities $ — $ 3,225 $ — $ 3,225 Assets measured at fair value on a nonrecurring basis Other real estate owned — — 2,503 2,503 Loans held for sale — 31,055 — 31,055 Impaired loans, net — — 57,089 57,089 Total assets measured at fair value on a nonrecurring basis $ — $ 31,055 $ 59,592 $ 90,647 There were no transfers between Level 1 and Level 2 of the fair value hierarchy during the nine months ended September 30, 2018 . Fair value is based on quoted market prices, where available. If such quoted market prices are not available, fair value is based on internally developed models or obtained from third parties that primarily use, as inputs, observable market-based parameters. Valuation adjustments may be made to ensure that financial instruments are recorded at fair value. These adjustments may include unobservable parameters. Our valuation methodologies may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. While we believe our valuation methodologies are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different estimate of fair value at the reporting date. Available-for-sale securities As of September 30, 2018 , securities classified as available-for-sale are reported at fair value using Level 2 inputs. Included in the Level 2 total are $997.1 million in Federal Agency MBS. We believe that this Level 2 designation is appropriate for these securities under ASC 820-10 as, with almost all fixed income securities, none are exchange traded, and all are priced by correlation to observed market data. For these securities we obtain fair value measurements from an independent pricing service. The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, U.S. government and agency yield curves, live trading levels, trade execution data, market consensus prepayment speeds, credit information, and the security’s terms and conditions, among other factors. Other investments Other investments includes our investments in equity securities with and without readily determinable fair values. Equity investments with readily determinable fair values are categorized as Level 1. Equity investments without readily determinable fair values, which includes our Visa Class B shares, are categorized as Level 3. Our Visa Class B ownership includes shares acquired at no cost from our prior participation in Visa’s network while Visa operated as a cooperative as well as shares subsequently acquired through private transactions and auctions. Our equity investments without readily determinable fair values are held at cost, and are adjusted for any observable transactions during the reporting period. As a result of our adoption of ASU 2016-01 and observable market transactions, we recorded an unrealized gain on our Visa Class B shares of $18.6 million during the nine months ended September 30, 2018 . See Note 1 for further information. Other real estate owned Other real estate owned consists of loan collateral which has been repossessed through foreclosure or other measures. Initially, foreclosed assets are recorded at the fair value of the collateral less estimated selling costs. Subsequent to foreclosure, valuations are updated periodically and the assets may be marked down further, reflecting a new cost basis. The fair value of our real estate owned was estimated using Level 3 inputs based on appraisals obtained from third parties. Loans held for sale The fair value of our loans held for sale is based on estimates using Level 2 inputs. These inputs are based on pricing information obtained from wholesale mortgage banks and brokers and applied to loans with similar interest rates and maturities. Impaired loans We evaluate and value impaired loans at the time the loan is identified as impaired, and the fair values of such loans are estimated using Level 3 inputs in the fair value hierarchy. Each loan’s collateral has a unique appraisal and management’s discount of the value is based on the factors unique to each impaired loan. The significant unobservable input in determining the fair value is management’s subjective discount on appraisals of the collateral securing the loan, which typically ranges from 10% - 20% . Collateral may consist of real estate and/or business assets including equipment, inventory and/or accounts receivable and the value of these assets is determined based on the appraisals by qualified licensed appraisers hired by us. Appraised and reported values may be discounted based on management’s historical knowledge, changes in market conditions from the time of valuation, estimated costs to sell, and/or management’s expertise and knowledge of the client and the client’s business. The gross amount of impaired loans, which are measured for impairment by either calculating the expected future cash flows discounted at the loan’s effective interest rate or determining the fair value of the collateral for collateral dependent loans was $55.9 million and $62.1 million at September 30, 2018 and December 31, 2017 , respectively. The valuation allowance on impaired loans was $5.4 million as of September 30, 2018 and $5.0 million as of December 31, 2017 . FAIR VALUE OF FINANCIAL INSTRUMENTS The reported fair values of financial instruments are based on a variety of factors. In certain cases, fair values represent quoted market prices for identical or comparable instruments. In other cases, fair values have been estimated based on assumptions regarding the amount and timing of estimated future cash flows that are discounted to reflect current market rates and varying degrees of risk. Accordingly, the fair values may not represent actual values of the financial instruments that could have been realized as of period-end or that will be realized in the future. The following methods and assumptions were used to estimate the fair value of each class of financial instruments for which it is practicable to estimate that value: Cash and cash equivalents For cash and short-term investment securities, including due from banks, federal funds sold or purchased under agreements to resell and interest-bearing deposits with other banks, the carrying amount is a reasonable estimate of fair value. Investment securities Fair value is estimated using quoted prices for similar securities, which we obtain from a third party vendor. We utilize one of the largest providers of securities pricing to the industry and management periodically assesses the inputs used by this vendor to price the various types of securities owned by us to validate the vendor’s methodology as described above in available-for-sale securities. Other investments Other investments includes our investments in equity securities with and without readily determinable fair values (see discussion in “Fair Value of Financial Assets and Liabilities” section above). Loans held for sale Loans held for sale are carried at their fair value (see discussion in “Fair Value of Financial Assets and Liabilities” section above). Loans Fair values are estimated for portfolios of loans with similar financial characteristics. Loans are segregated by type: commercial, commercial mortgages, owner-occupied commercial, construction, residential mortgages and consumer. For loans that reprice frequently, the book value approximates fair value. The fair values of other types of loans, with the exception of reverse mortgages, are estimated by discounting expected cash flows using the current rates at which similar loans would be made to borrowers with comparable credit ratings and for similar remaining maturities. The fair values of reverse mortgages are based on the net present value of the expected cash flows using a discount rate specific to the reverse mortgages portfolio. The fair value of nonperforming loans is based on recent external appraisals of the underlying collateral. Estimated cash flows, discounted using a rate commensurate with current rates and the risk associated with the estimated cash flows, are used if appraisals are not available. This technique does contemplate an exit price. Stock in the Federal Home Loan Bank (FHLB) of Pittsburgh The fair value of FHLB stock is assumed to be equal to its cost basis, since the stock is non-marketable but redeemable at its par value. Other assets Other assets includes, among other things, investments in subsidiaries, prepaid expenses, interest and fee income receivable, derivative financial instruments and deferred tax assets (see discussion in “Fair Value of Financial Assets and Liabilities” section above). Deposits The fair value of deposits with no stated maturity, such as noninterest-bearing demand deposits, money market and interest-bearing demand deposits, is assumed to be equal to the amount payable on demand. The fair value of time deposits is based on the discounted value of contractual cash flows. The discount rate is estimated using rates currently offered for deposits with comparable remaining maturities. Borrowed funds Rates currently available to us for debt with similar terms and remaining maturities are used to estimate the fair value of existing debt. Other Liabilities Other liabilities includes, among others, cash flow derivatives and derivatives on the residential mortgage held for sale pipeline. Valuation of our cash flow derivatives is obtained from an independent pricing service and also from the derivative counterparty. Valuation of the derivative related to the residential mortgage held for sale pipeline is based on valuation of the loans held for sale portfolio as described above in Loans held for sale . Off-balance sheet instruments The fair value of off-balance sheet instruments, including commitments to extend credit and standby letters of credit, approximates the recorded net deferred fee amounts, which are not significant. Because commitments to extend credit and letters of credit are generally not assignable by either us or the borrower, they only have value to us and the borrower. The book value and estimated fair value of our financial instruments are as follows: September 30, 2018 December 31, 2017 (Dollars in thousands) Fair Value Measurement Book Value Fair Value Book Value Fair Value Financial assets: Cash and cash equivalents Level 1 $ 711,372 $ 711,372 $ 723,866 $ 723,866 Investment securities available for sale See previous table 997,131 997,131 837,499 837,499 Investment securities held to maturity Level 2 152,577 150,583 161,186 162,853 Other investments Level 1,3 35,083 35,083 14,671 45,326 Loans, held for sale Level 2 35,855 35,855 31,055 31,055 Loans, net (1)(2) Level 2,3 4,835,591 4,802,841 4,719,229 4,699,458 Impaired loans, net Level 3 50,545 50,545 57,089 57,089 Stock in FHLB of Pittsburgh Level 2 16,540 16,540 31,284 31,284 Accrued interest receivable Level 2 21,331 21,331 19,405 19,405 Other assets Level 3 977 977 2,883 2,883 Financial liabilities: Deposits Level 2 5,723,916 5,685,435 5,247,604 4,848,588 Borrowed funds Level 2 545,089 538,395 937,806 937,605 Standby letters of credit Level 3 328 328 603 603 Accrued interest payable Level 2 7,119 7,119 1,037 1,037 Other liabilities Level 2 4,781 4,781 3,188 3,188 (1) Excludes impaired loans, net. (2) Includes reverse mortgage loans, which are categorized as Level 3. At September 30, 2018 and December 31, 2017 we had no commitments to extend credit measured at fair value.

DERIVATIVE FINANCIAL INSTRUMENT

DERIVATIVE FINANCIAL INSTRUMENTS	9 Months Ended
	Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVE FINANCIAL INSTRUMENTS	11. DERIVATIVE FINANCIAL INSTRUMENTS Risk Management Objective of Using Derivatives We are exposed to certain risks arising from both economic conditions and our business operations. We principally manage our exposures to a wide variety of business and operational risks through management of our core business activities. We manage economic risks, including interest rate, liquidity, and credit risk, primarily by managing the amount, sources, and duration of our assets and liabilities. We manage a matched book with respect to our derivative instruments in order to minimize our net risk exposure resulting from such transactions. Our cash flow hedging program began in the third quarter of 2016. Fair Values of Derivative Instruments The table below presents the fair value of our derivative financial instruments as well as their location on the unaudited Consolidated Statements of Financial Condition as of September 30, 2018 . Fair Values of Derivative Instruments (Dollars in thousands) Count Notional Balance Sheet Location Derivatives (Fair Value) Derivatives designated as hedging instruments: Interest rate products 3 $ 75,000 Other Liabilities $ (4,689 ) Total $ 75,000 $ (4,689 ) Derivatives not designated as hedging instruments: Interest rate lock commitments with customers 47,634 Other Assets $ 595 Interest rate lock commitments with customers 16,064 Other Liabilities (61 ) Forward sale commitments 44,840 Other Assets 382 Forward sale commitments 15,792 Other Liabilities (31 ) Total $ 124,330 $ 885 Total derivatives $ 199,330 $ (3,804 ) Cash Flow Hedges of Interest Rate Risk Our objectives in using interest rate derivatives are to add stability to interest income and to manage our exposure to interest rate movements. To accomplish this objective, we primarily use interest rate swaps as part of our interest rate risk management strategy. Interest rate swaps designated as cash flow hedges involve the receipt of fixed amounts from a counterparty in exchange for us making variable-rate payments over the life of the agreements without exchange of the underlying notional amount. The effective portion of changes in the fair value of derivatives designated and that qualify as cash flow hedges is recorded in accumulated other comprehensive income (loss) and is subsequently reclassified into earnings in the period that the hedged forecast transaction affects earnings. During the nine months ended September 30, 2018 , such derivatives were used to hedge the variable cash flows associated with a variable rate loan pool. The ineffective portion of the change in fair value of the derivatives is recognized directly in earnings. During the nine months ended September 30, 2018 , we did not record any hedge ineffectiveness. Amounts reported in accumulated other comprehensive income (loss) related to derivatives are reclassified to interest income as interest payments are received on our variable-rate pooled loans. During the next twelve months, we estimate that $1.1 million will be reclassified as an increase to interest income. During the nine months ended September 30, 2018 , $0.4 million was reclassified into interest income. We are hedging our exposure to the variability in future cash flows for forecasted transactions over a maximum period of one month (excluding forecasted transactions related to the payment of variable interest on existing financial instruments). As of September 30, 2018 , we had three outstanding interest rate derivatives with an aggregate notional amount of $75 million that were designated as cash flow hedges of interest rate risk. Effect of Derivative Instruments on the Income Statement The table below presents the effect of the derivative financial instruments on the unaudited Consolidated Statements of Income for the three and nine months ended September 30, 2018 and September 30, 2017 . Amount of (Loss) or Gain Recognized in OCI on Derivative (Effective Portion) Amount of (Loss) or Gain Recognized in OCI on Derivative (Effective Portion) Location of (Loss) or Gain Reclassified from Accumulated OCI into Income (Effective Portion) (Dollars in thousands) Three Months Ended September 30, Nine Months Ended September 30, Derivatives in Cash Flow Hedging Relationships 2018 2017 2018 2017 Interest Rate Products $ (109 ) $ 42 $ (1,119 ) $ 192 Interest income Total $ (109 ) $ 42 $ (1,119 ) $ 192 Amount of Gain or (Loss) Recognized in Income Amount of Gain or (Loss) Recognized in Income Location of Gain or (Loss) Recognized in Income (Dollars in thousands) Three Months Ended September 30, Nine Months Ended September 30, Derivatives Not Designated as a Hedging Instrument 2018 2017 2018 2017 Interest Rate Lock Commitments $ 192 $ — $ (104 ) $ — Mortgage banking activities, net Forward Sale Commitments (176 ) $ — (508 ) $ — Mortgage banking activities, net Total $ 16 $ — $ (612 ) $ — Credit risk-related Contingent Features We have agreements with certain derivative counterparties that contain a provision where if we default on any of our indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then we could also be declared in default on our derivative obligations. We also have agreements with certain derivative counterparties that contain a provision where if we fail to maintain our status as a well capitalized or adequately capitalized institution, then the counterparty could terminate the derivative positions and we would be required to settle our obligations under the agreements. As of September 30, 2018 , the termination value of derivatives in a net liability position, which includes accrued interest but excludes any adjustment for nonperformance risk, related to these agreements was $4.7 million . We have minimum collateral posting thresholds with certain of our derivative counterparties, and have posted collateral of $5.6 million against our obligations under these agreements. If we had breached any of these provisions at September 30, 2018 , we could have been required to settle our obligations under the agreements at the termination value.

SEGMENT INFORMATION

SEGMENT INFORMATION	9 Months Ended
	Sep. 30, 2018
Segment Reporting [Abstract]
SEGMENT INFORMATION	12. SEGMENT INFORMATION As defined in FASB ASC 280, Segment Reporting (ASC 280), an operating segment is a component of an enterprise that engages in business activities from which it may earn revenues and incur expenses, whose operating results are regularly reviewed by the enterprise’s chief operating decision makers to make decisions about resources to be allocated to the segment and assess its performance, and for which discrete financial information is available. We evaluate performance based on pretax net income relative to resources used, and allocate resources based on these results. The accounting policies applicable to our segments are those that apply to our preparation of the accompanying unaudited Consolidated Financial Statements. Based on these criteria, we have identified three segments: WSFS Bank, Cash Connect ® , and Wealth Management. The WSFS Bank segment provides financial products to commercial and retail customers. Retail and Commercial Banking, Commercial Real Estate Lending and other banking business units are operating departments of WSFS Bank. These departments share the same regulator, the same market, many of the same customers and provide similar products and services through the general infrastructure of the Bank. Accordingly, these departments are not considered discrete segments and are appropriately aggregated within the WSFS Bank segment in accordance with ASC 280. Cash Connect ® provides ATM vault cash and smart safe and cash logistics services through strategic partnerships with several of the largest networks, manufacturers and service providers in the ATM industry. Cash Connect ® services non-bank and WSFS-branded ATMs and retail safes nationwide. The balance sheet category “ Cash in non-owned ATMs ” includes cash from which fee income is earned through bailment arrangements with customers of Cash Connect ® . The Wealth Management segment provides a broad array of planning and advisory services, investment management, trust services, and credit and deposit products to individual, corporate, and institutional clients through multiple integrated businesses. WSFS Wealth Investments provides financial advisory services along with insurance and brokerage products. Cypress, a registered investment adviser, is a fee-only wealth management firm managing a “balanced” investment style portfolio focused on preservation of capital and generating current income. WSFS (West) Capital Management, a registered investment adviser, is a fee-only wealth management firm operating under a multi-family office philosophy to provide customized solutions to institutions and high-net-worth individuals. The trust division of WSFS Bank (doing business as Christiana Trust) provides personal trust and fiduciary services, as well as, trustee, agency, bankruptcy administration, custodial and commercial domicile services to corporate and institutional clients. Powdermill is a multi-family office specializing in providing independent solutions to high-net-worth individuals, families and corporate executives through a coordinated, centralized approach. WSFS Wealth Client Management serves high-net-worth clients by delivering credit and deposit products and partnering with other Wealth Management units to provide comprehensive solutions to clients. The following tables show segment results for the three and nine months ended September 30, 2018 and 2017 : Three Months Ended September 30, 2018 Three Months Ended September 30, 2017 (Dollars in thousands) WSFS Bank Cash ® Wealth Management Total WSFS Bank Cash ® Wealth Total Statements of Income External customer revenues: Interest income $ 72,836 $ — $ 2,579 $ 75,415 $ 62,748 $ — $ 2,262 $ 65,010 Noninterest income 18,524 13,026 10,351 41,901 12,102 11,212 9,127 32,441 Total external customer revenues 91,360 13,026 12,930 117,316 74,850 11,212 11,389 97,451 Inter-segment revenues: Interest income 4,002 — 3,020 7,022 2,537 — 2,235 4,772 Noninterest income 2,122 200 36 2,358 1,721 213 37 1,971 Total inter-segment revenues 6,124 200 3,056 9,380 4,258 213 2,272 6,743 Total revenue 97,484 13,226 15,986 126,696 79,108 11,425 13,661 104,194 External customer expenses: Interest expense 11,461 — 857 12,318 8,542 — 339 8,881 Noninterest expenses 44,922 8,133 (601 ) 52,454 39,546 7,048 7,569 54,163 Provision for loan losses 3,776 — (60 ) 3,716 3,065 — (169 ) 2,896 Total external customer expenses 60,159 8,133 196 68,488 51,153 7,048 7,739 65,940 Inter-segment expenses: Interest expense 3,020 2,885 1,117 7,022 2,235 1,856 681 4,772 Noninterest expenses 236 627 1,495 2,358 250 556 1,165 1,971 Total inter-segment expenses 3,256 3,512 2,612 9,380 2,485 2,412 1,846 6,743 Total expenses 63,415 11,645 2,808 77,868 53,638 9,460 9,585 72,683 Income before taxes $ 34,069 $ 1,581 $ 13,178 $ 48,828 $ 25,470 $ 1,965 $ 4,076 $ 31,511 Income tax provision 9,893 10,942 Consolidated net income $ 38,935 $ 20,569 Nine Months Ended September 30, 2018 Nine Months Ended September 30, 2017 (Dollars in thousands) WSFS Bank Cash ® Wealth Total WSFS Bank Cash ® Wealth Total Statements of Income External customer revenues: Interest income $ 207,725 $ — $ 7,454 $ 215,179 $ 181,670 $ — $ 6,500 $ 188,170 Noninterest income 57,175 36,707 30,473 124,355 34,318 31,403 26,488 92,209 Total external customer revenues 264,900 36,707 37,927 339,534 215,988 31,403 32,988 280,379 Inter-segment revenues: Interest income 10,535 — 8,053 18,588 6,780 — 6,735 13,515 Noninterest income 6,449 581 107 7,137 5,791 611 113 6,515 Total inter-segment revenues 16,984 581 8,160 25,725 12,571 611 6,848 20,030 Total revenue 281,884 37,288 46,087 365,259 228,559 32,014 39,836 300,409 External customer expenses: Interest expense 31,563 — 1,816 33,379 23,744 — 880 24,624 Noninterest expenses 126,862 23,357 13,478 163,697 117,288 19,774 21,334 158,396 Provision for loan losses 9,721 — 143 9,864 6,097 — 804 6,901 Total external customer expenses 168,146 23,357 15,437 206,940 147,129 19,774 23,018 189,921 Inter-segment expenses: Interest expense 8,053 7,460 3,075 18,588 6,735 4,843 1,937 13,515 Noninterest expenses 688 1,936 4,513 7,137 724 1,944 3,847 6,515 Total inter-segment expenses 8,741 9,396 7,588 25,725 7,459 6,787 5,784 20,030 Total expenses 176,887 32,753 23,025 232,665 154,588 26,561 28,802 209,951 Income before taxes $ 104,997 $ 4,535 $ 23,062 $ 132,594 $ 73,971 $ 5,453 $ 11,034 $ 90,458 Income tax provision 27,569 30,382 Consolidated net income $ 105,025 $ 60,076 The following table shows significant components of segment net assets as of September 30, 2018 and December 31, 2017 : September 30, 2018 December 31, 2017 (Dollars in thousands) WSFS Bank Cash ® Wealth Total WSFS Bank Cash ® Wealth Management Total Statements of Financial Condition Cash and cash equivalents $ 132,857 $ 564,915 $ 13,600 $ 711,372 $ 104,530 $ 611,385 $ 7,951 $ 723,866 Goodwill 145,808 — 20,199 166,007 145,808 — 20,199 166,007 Other segment assets 6,053,095 8,098 221,270 6,282,463 5,882,910 6,078 220,679 6,109,667 Total segment assets $ 6,331,760 $ 573,013 $ 255,069 $ 7,159,842 $ 6,133,248 $ 617,463 $ 248,829 $ 6,999,540 Capital expenditures $ 4,252 $ 340 $ 316 $ 4,908 $ 8,197 $ 184 $ 613 $ 8,994

INDEMNIFICATIONS AND GUARANTEES

INDEMNIFICATIONS AND GUARANTEES	9 Months Ended
	Sep. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
INDEMNIFICATIONS AND GUARANTEES	13. INDEMNIFICATIONS AND GUARANTEES Secondary Market Loan Sales Given the current interest rate environment and our overall asset and liability management approach, we typically sell newly originated residential mortgage loans in the secondary market to mortgage loan aggregators and on a more limited basis, to government sponsored entities (GSEs) such as FHLMC, FNMA, and the FHLB. Loans held for sale are reflected on our unaudited Consolidated Statements of Financial Condition at fair value with changes in the value reflected in our unaudited Consolidated Statements of Income. Gains and losses are recognized at the time of sale. We periodically retain the servicing rights on residential mortgage loans sold which results in monthly service fee income. The mortgage servicing rights are included in our intangible assets in our unaudited Consolidated Statements of Financial Condition. Otherwise, we sell loans with servicing released on a nonrecourse basis. Rate-locked loan commitments that we intend to sell in the secondary market are accounted for as derivatives under ASC Topic 815, Derivatives and Hedging (ASC 815) . We do not sell loans with recourse, except for standard loan sale contract provisions covering violations of representations and warranties and, under certain circumstances, early payment default by the borrower. These are customary repurchase provisions in the secondary market for residential mortgage loan sales. These provisions may include either an indemnification from loss or the repurchase of the loans. Repurchases and losses have been rare and no provision is made for losses at the time of sale. There were no such repurchases during the nine months ended September 30, 2018 . Swap Guarantees We entered into agreements with five unrelated financial institutions whereby those financial institutions entered into interest rate derivative contracts (interest rate swap transactions) with customers referred to them by us. Under the terms of the agreements, those financial institutions have recourse to us for any exposure created under each swap transaction in the event that the customer defaults on the swap agreement and the agreement is in a paying position to the third-party financial institution. This is a customary arrangement that allows us to provide access to interest rate swap transactions for our customers without creating the swap ourselves. These swap guarantees are accounted for as credit derivatives . At September 30, 2018 and December 31, 2017 , there were 135 and 134 variable-rate to fixed-rate swap transactions between the third party financial institutions and our customers, respectively. The initial notional aggregate amount was approximately $571.7 million at September 30, 2018 compared to $561.8 million at December 31, 2017 . At September 30, 2018 maturities ranged from under 1 year to 10 years. The aggregate market value of these swaps to the customers was an asset of $9.8 million at September 30, 2018 and a liability of $3.3 million at December 31, 2017 . We had no reserves for the swap guarantees as of September 30, 2018 .

CHANGE IN ACCUMULATED OTHER COM

CHANGE IN ACCUMULATED OTHER COMPREHENSIVE LOSS	9 Months Ended
	Sep. 30, 2018
Equity [Abstract]
CHANGE IN ACCUMULATED OTHER COMPREHENSIVE LOSS	14. CHANGE IN ACCUMULATED OTHER COMPREHENSIVE LOSS Accumulated other comprehensive loss includes unrealized gains and losses on available-for-sale investments, unrealized gains and losses on cash flow hedges, as well as unrecognized prior service costs, transition costs, and actuarial gains and losses on defined benefit pension plans. Changes to accumulated other comprehensive loss are presented, net of tax, as a component of stockholders’ equity. Amounts that are reclassified out of accumulated other comprehensive loss are recorded on the unaudited Consolidated Statement of Income either as a gain or loss. Changes to accumulated other comprehensive loss by component are shown, net of taxes, in the following tables for the period indicated: (Dollars in thousands) Net change in investment securities available for sale Net change in investment securities held to maturity Net change in defined benefit plan Net change in fair value of derivatives used for cash flow hedges Total Balance, June 30, 2018 $ (24,186 ) $ 987 $ 894 $ (3,408 ) $ (25,713 ) Other comprehensive (loss) income before reclassifications (6,042 ) — 7 (109 ) (6,144 ) Less: Amounts reclassified from accumulated other comprehensive (loss) income — (107 ) (37 ) — (144 ) Net current-period other comprehensive loss (6,042 ) (107 ) (30 ) (109 ) (6,288 ) Balance, September 30, 2018 $ (30,228 ) $ 880 $ 864 $ (3,517 ) $ (32,001 ) Balance, June 30, 2017 $ (4,342 ) $ 1,194 $ 912 $ (1,622 ) $ (3,858 ) Other comprehensive income before reclassifications 1,289 — — 42 1,331 Less: Amounts reclassified from accumulated other comprehensive income (475 ) (99 ) (22 ) — (596 ) Net current-period other comprehensive (loss) income 814 (99 ) (22 ) 42 735 Balance, September 30, 2017 $ (3,528 ) $ 1,095 $ 890 $ (1,580 ) $ (3,123 ) Balance, December 31, 2017 $ (7,842 ) $ 1,223 $ 865 $ (2,398 ) $ (8,152 ) Other comprehensive (loss) income before reclassifications (22,370 ) — 15 (1,119 ) (23,474 ) Less: Amounts reclassified from accumulated other comprehensive (loss) income (16 ) (343 ) (16 ) — (375 ) Net current-period other comprehensive (loss) income (22,386 ) (343 ) (1 ) (1,119 ) (23,849 ) Balance, September 30, 2018 $ (30,228 ) $ 880 $ 864 $ (3,517 ) $ (32,001 ) Balance, December 31, 2016 $ (8,194 ) $ 1,392 $ 957 $ (1,772 ) $ (7,617 ) Other comprehensive income before reclassifications 5,802 — — 192 5,994 Less: Amounts reclassified from accumulated other comprehensive income (1,136 ) (297 ) (67 ) — (1,500 ) Net current-period other comprehensive income (loss) 4,666 (297 ) (67 ) 192 4,494 Balance, September 30, 2017 $ (3,528 ) $ 1,095 $ 890 $ (1,580 ) $ (3,123 ) The unaudited Consolidated Statements of Income were impacted by components of other comprehensive income (loss) as shown in the table below: Three Months Ended September 30, Affected line item in unaudited Consolidated Statements of Income (Dollars in thousands) 2018 2017 Securities available for sale: Realized gains on securities transactions $ — $ (736 ) Securities gains, net Income taxes — 261 Income tax provision Net of tax $ — $ (475 ) Net unrealized holding gains on securities transferred between available-for-sale and held-to-maturity: Amortization of net unrealized gains to income during the period $ (142 ) $ (159 ) Interest and dividends on investment securities Income taxes 35 60 Income tax provision Net of tax $ (107 ) $ (99 ) Amortization of Defined Benefit Pension items: Prior service costs (credits) $ (19 ) $ (19 ) Actuarial gains (11 ) (18 ) Total before tax $ (30 ) $ (37 ) Salaries, benefits and other compensation Income taxes (7 ) 15 Income tax provision Net of tax (37 ) (22 ) Total reclassifications $ (144 ) $ (596 ) Nine Months Ended Affected line item in unaudited Consolidated Statements of Operations September 30, 2018 2017 Securities available-for-sale: Realized gains on securities transactions $ (21 ) $ (1,764 ) Securities gains, net Income taxes 5 628 Income tax provision Net of tax $ (16 ) $ (1,136 ) Net unrealized holding gains on securities transferred between available-for-sale and held-to-maturity: Amortization of net unrealized gains to income during the period $ (451 ) $ (478 ) Interest and dividends on investment securities Income taxes 108 181 Income tax provision Net of tax $ (343 ) $ (297 ) Amortization of defined benefit pension plan-related items: Prior service costs (credits) (1) $ 21 $ (57 ) Actuarial gains (34 ) (52 ) Total before tax $ (13 ) $ (109 ) Salaries, benefits and other compensation Income taxes (3 ) 42 Income tax provision Net of tax $ (16 ) $ (67 ) Total reclassifications $ (375 ) $ (1,500 ) (1) Prior service costs balance for the nine months ended September 30, 2018 includes a tax true-up adjustment of $0.1 million from March 31, 2018. Note that the tax true-up was made to the deferred tax asset with an offset to AOCI and does not affect the actual net periodic benefit costs of the pension plan.

RELATED PARTY TRANSACTIONS

RELATED PARTY TRANSACTIONS	9 Months Ended
	Sep. 30, 2018
Related Party Transactions [Abstract]
RELATED PARTY TRANSACTIONS	15. RELATED PARTY TRANSACTIONS In the ordinary course of business, from time to time we enter into transactions with related parties, including, but not limited to, our officers and directors. These transactions are made on substantially the same terms and conditions, including interest rates and collateral requirements, as those prevailing at the same time for comparable transactions with other customers. They do not, in the opinion of management, involve greater than normal credit risk or include other features unfavorable to us. The outstanding balances of loans to related parties at September 30, 2018 and December 31, 2017 were $1.2 million in both periods. Total deposits from related parties at September 30, 2018 and December 31, 2017 were $4.6 million and $5.4 million , respectively. During the third quarter of 2018, new loans and credit line advances to related parties were $0.1 million and repayments were $0.8 million .

LEGAL AND OTHER PROCEEDINGS

LEGAL AND OTHER PROCEEDINGS	9 Months Ended
	Sep. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
LEGAL AND OTHER PROCEEDINGS	16. LEGAL AND OTHER PROCEEDINGS In accordance with the current accounting standards for loss contingencies, we establish reserves for litigation-related matters that arise in the ordinary course of our business activities when it is probable that a loss associated with a claim or proceeding has been incurred and the amount of the loss can be reasonably estimated. Litigation claims and proceedings of all types are subject to many uncertain factors that generally cannot be predicted with assurance. In addition, our defense of litigation claims may result in legal fees, which we expense as incurred. As previously disclosed, on February 27, 2018 , we entered into a settlement agreement with Universitas Education, LLC (Universitas) to resolve arbitration claims related to services provided by Christiana Bank and Trust Company (CB&T) prior to its acquisition by WSFS in December 2010. In accordance with the litigation settlement, we paid Universitas $12.0 million to fully settle the claims. During the third quarter of 2018, WSFS recovered $7.9 million in settlement and legal costs from insurance carriers that provided coverage relating to the Universitas matter. WSFS will continue to pursue all of its rights and remedies to recover the remaining amounts relating to the Universitas proceeding, including the Universitas settlement payment, legal fees and related costs, by enforcing the indemnity right in the 2010 purchase agreement by which WSFS acquired CB&T. There were no material changes or additions to other significant pending legal or other proceedings involving us other than those arising out of routine operations.

BASIS OF PRESENTATION (Policies

BASIS OF PRESENTATION (Policies)	9 Months Ended
	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	General Our unaudited Consolidated Financial Statements include the accounts of WSFS Financial Corporation (the Company or WSFS), Wilmington Savings Fund Society, FSB (WSFS Bank or the Bank), WSFS Wealth Management, LLC (Powdermill), WSFS Capital Management, LLC (West Capital), Cypress Capital Management, LLC (Cypress) and Christiana Trust Company of Delaware (Christiana Trust DE). We also have one unconsolidated subsidiary, WSFS Capital Trust III. WSFS Bank has three wholly-owned subsidiaries: WSFS Investment Group, Inc. (WSFS Wealth Investments), 1832 Holdings, Inc. and Monarch Entity Services, LLC. Overview Founded in 1832, the Bank is one of the ten oldest bank and trust companies continuously operating under the same name in the United States (U.S.). We provide residential and commercial real estate, commercial and consumer lending services, as well as retail deposit and cash management services. Lending activities are funded primarily with customer deposits and borrowings. In addition, we offer a variety of wealth management and trust services to personal and corporate customers. The Federal Deposit Insurance Corporation (FDIC) insures our customers’ deposits to their legal maximums. We serve our customers primarily from 77 offices located in Delaware ( 46 ), Pennsylvania ( 29 ), Virginia ( 1 ) and Nevada ( 1 ) and through our website at www.wsfsbank.com . Information on our website is not incorporated by reference into this quarterly report. In preparing the unaudited Consolidated Financial Statements, we are required to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenue and expenses. Amounts subject to significant estimates include the allowance for loan losses and reserves for lending-related commitments, goodwill, intangible assets, post-retirement benefit obligations, the fair value of financial instruments, and other-than-temporary impairment (OTTI). Among other effects, changes to these estimates could result in future impairments of investment securities, goodwill and intangible assets, the establishment of the allowance and lending-related commitments as well as increased post-retirement benefits expense. Our accounting and reporting policies conform to Generally Accepted Accounting Principles (GAAP) in the U.S., prevailing practices within the banking industry for interim financial information and Rule 10-01 of SEC Regulation S-X (Rule 10-01). Rule 10-01 does not require us to include all information and notes that would be required in audited financial statements. Certain prior period amounts have been reclassified to conform with current period presentation. Operating results for the periods presented are not necessarily indicative of the results that may be expected for any future quarters or for the year ending December 31, 2018 . These unaudited, interim Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and related notes included in our Annual Report on Form 10-K for the year ended December 31, 2017 (the 2017 Annual Report on Form 10-K) that was filed with the SEC on March 1, 2018 and is available at www.sec.gov or on our website at http://investors.wsfsbank.com/financials.cfm. All significant intercompany transactions were eliminated in consolidation.
Equity Securities	Equity Securities Following our adoption of ASU 2016-01 on January 1, 2018, as described in " Recent Accounting Pronouncements ", we account for our investments in equity securities in accordance with ASC 321-10 Investments - Equity Securities. Our equity securities may be classified into two categories and accounted for as follows: • Equity securities with a readily determinable fair value are reported at fair value, with unrealized gains and losses included in earnings. Any dividends received are recorded in interest income. • Equity securities without a readily determinable fair value are reported at their cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or similar investment of the same issuer and their impact on fair value. Any dividends received are recorded in interest income. Equity investments include our investment in Visa Class B shares and certain other equity investments. The fair value of equity investments with readily determinable fair values is primarily obtained from third-party pricing services. For equity investments without readily determinable fair values, when an orderly transaction for the identical or similar investment of the same issuer is identified, we use the valuation techniques permitted under ASC 820 Fair Value Measuremen t to evaluate the observed transaction(s) and adjust the fair value of the equity investment. ASC 321-10 also provides guidance related to accounting for impairment of equity securities without readily determinable fair values. The qualitative assessment to determine whether impairment exists requires the use of our judgment in certain circumstances. If, after completing the qualitative assessment, we conclude an equity investment without a readily determinable fair value is impaired, a loss for the difference between the equity investment’s carrying value and its fair value may be recognized as a reduction to noninterest income in the Consolidated Statements of Income.
Recent Accounting Pronouncements	RECENT ACCOUNTING PRONOUNCEMENTS Accounting Guidance Adopted in 2018 In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2014-09, Revenue from Contracts with Customers (Topic 606). This ASU supersedes the revenue recognition requirements in ASC 605, Revenue Recognition . ASU No. 2014-09 requires an entity to recognize revenue when it transfers promised goods or services to customers using a five-step model in which entities should exercise judgment when considering the terms of the contracts. In August 2015, the FASB issued ASU No. 2015-14, Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date . This amendment deferred the effective date of ASU 2014-09 by one year. In March 2016, the FASB issued ASU 2016-08, Principal versus Agent Considerations (Reporting Gross versus Net), which amends the principal versus agent guidance and clarifies that the analysis must focus on whether the entity has control of the goods or services before they are transferred to the customer. In addition, the FASB issued ASU Nos. 2016-20, Technical Corrections and Improvements to Topic 606, Revenue from Contracts with Customers and 2016-12, Narrow-Scope Improvements and Practical Expedients , both of which provide additional clarification on certain provisions in Topic 606. These ASC updates were effective for public business entities with annual and interim reporting periods in fiscal years beginning after December 15, 2017. The standard permits the use of either the retrospective or modified retrospective with the cumulative effect transition method. The Company adopted the standard on January 1, 2018. Consistent with the transition guidance in ASC 606, results for reporting periods beginning after January 1, 2018 are presented in accordance with ASC 606, while prior period amounts are reported in accordance with ASC 605. For revenue streams determined to be within the scope of the new standard, we concluded that the adoption of the standard did not have a material effect on our Consolidated Financial Statements at the time of adoption. See Note 2 for additional disclosures resulting from our adoption of this standard. In January 2016, the FASB issued ASU No. 2016-01, Financial Instruments - Overall (Subtopic 825-10), Recognition and Measurement of Financial Assets and Financial Liabilities. This amendment requires that equity investments be measured at fair value with changes in fair value recognized in net income. When fair value is not readily determinable, an entity may elect to measure the equity investment at cost, less impairment, plus or minus any change in the investment’s observable price. For financial liabilities that are measured at fair value, the amendment requires an entity to present separately, in other comprehensive income, any change in fair value resulting from a change in instrument specific credit risk. This guidance is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is permitted. The standard requires retrospective application for equity investments with readily determinable fair values and prospective application for equity investments without readily determinable fair values. The Company adopted the standard on January 1, 2018 on a prospective basis for its equity investments without readily determinable fair values, and the adoption of the standard did not have an effect on our Consolidated Financial Statements at the time of adoption. Subsequent to the filing of our 2017 Annual Report on Form 10-K, we identified observable transactions related to an equity investment without a readily determinable fair value. These identified, observable transactions required the revaluation of this equity investment. The result of the revaluation was recorded in the Consolidated Statements of Income in the first quarter of 2018. See Note 10 for further information. In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments . ASU 2016-15 represents the Emerging Issues Task Force’s final consensus on eight issues related to the classification of cash payments and receipts in the statement of cash flows for a number of common transactions. The consensus also clarifies when identifiable cash flows should be separated versus classified based on their predominant source or use. This guidance is effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. The Company adopted this standard on January 1, 2018, on a retrospective basis and the adoption did not have an effect on the Consolidated Financial Statements. In January 2017, the FASB issued ASU 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business. ASU 2017-01 provides a new, two-step framework for determining whether a transaction is accounted for as an acquisition (or disposal) of assets or a business. The first step is evaluating whether substantially all of the fair value of the gross assets acquired is concentrated in a single identifiable asset or a group of similar identifiable assets; if so, the transaction is not considered a business. Also, in order to be considered a business, the transaction would need to include an input and a substantive process that together significantly contribute to the ability to create outputs. The guidance is effective for public entities in annual and interim periods in fiscal years beginning after December 15, 2017. Early adoption is permitted for transactions that have not been reported in financial statements that have been issued or been made available for issuance. The Company adopted this standard on January 1, 2018, on a prospective basis with no impact to the Consolidated Financial Statements at the time of adoption. In February 2017, the FASB issued ASU No. 2017-05, Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets. ASU 2017-05 provides clarification of the scope of ASC 610-20. Specifically, the new guidance clarifies that ASC 610-20 applies to nonfinancial assets which do not meet the definition of a business or not-for-profit activity. Further, a financial asset is within the scope of ASC 610-20 if it meets the definition of an in-substance nonfinancial asset which is defined as a financial asset promised to a counterparty in a contract where substantially all of the assets promised are nonfinancial. Finally, each distinct nonfinancial asset and in-substance nonfinancial asset should be derecognized when the counterparty obtains control. The guidance is effective in annual and interim reporting periods in fiscal years beginning after December 15, 2017. Early application is permitted for all entities, but not before annual reporting periods beginning after December 15, 2016. The Company adopted this standard on January 1, 2018, on a modified retrospective basis and the adoption did not have an effect on the Consolidated Financial Statements at the time of adoption. In March 2017, the FASB issued ASU No. 2017-07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. The new guidance requires that the service cost component of net periodic pension cost be disclosed with other compensation costs in the income statement. For all other cost components, an entity must either separately disclose the other cost components in separate line item(s) outside a subtotal of income from operations in the income statement or disclose the line item(s) used to present the other cost components in the income statement. The guidance is effective in annual and interim periods in fiscal years beginning after December 15, 2017. Early adoption is permitted. The Company adopted this standard on January 1, 2018, on a retrospective basis with no impact to the Consolidated Financial Statements at the time of adoption. In May 2017, the FASB issued ASU No. 2017-09, Scope of Modification Accounting . The new guidance clarifies when changes to the terms or conditions of a share-based payment award must be accounted for as modifications. If the award’s fair value, vesting conditions and classification remain the same immediately before and after the change, modification accounting is not applied. Additionally, the guidance does not require valuation before or after the change if the change does not affect any of the inputs to the model used to value the award. The guidance is effective in annual and interim periods beginning after December 15, 2017. Early adoption is permitted. The new guidance will be applied on a prospective basis to awards modified on or after the adoption date. The Company adopted this standard on January 1, 2018, on a prospective basis with no impact to the Consolidated Financial Statements at the time of adoption. Accounting Guidance Pending Adoption at September 30, 2018 In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) . This ASU revises the accounting related to lessee accounting. Under the new guidance, lessees will be required to recognize a lease liability and a right-of-use asset for substantially all leases. The new lease guidance also simplifies the accounting for sale and leaseback transactions primarily because lessees must recognize lease assets and lease liabilities. ASU 2016-02 is effective for the first interim period within annual periods beginning after December 15, 2018, with early adoption permitted. Adoption using the modified retrospective transition approach is required; however, in July 2018, the FASB issued ASU 2018-11, Leases-Targeted Improvements, which provides an optional transition method whereby comparative periods presented in the financial statements in the period of adoption do not need to be restated under Topic 842. The Company will adopt this guidance on January 1, 2019. The Company has substantially completed its process of identifying its lease population as defined by this guidance and anticipates finalizing the impact analysis on the Consolidated Financial Statements in the fourth quarter. To date, our review suggests that adoption will increase assets and liabilities on our Consolidated Statements of Financial Condition. The Company will continue to assess the impact of this guidance, taking into consideration available accounting policy elections and significant assumptions and judgments such as the discount rate and renewal options. In addition, the Company continues to evaluate its internal systems, accounting policies, processes and related internal controls for potential effects. To date, we have been working to implement a lease accounting and administration software to assist us with initial and on-going requirements of the new guidance. The Company expects to complete the implementation in the fourth quarter. In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326). ASU 2016-13 replaces the incurred loss impairment methodology in current GAAP with an expected credit loss methodology and requires consideration of a broader range of information to determine credit loss estimates. Financial assets measured at amortized cost will be presented at the net amount expected to be collected by using an allowance for credit losses. Purchased credit impaired loans will receive an allowance account at the acquisition date that represents a component of the purchase price allocation. Credit losses relating to available-for-sale debt securities will be recorded through an allowance for credit losses, with such allowance limited to the amount by which fair value is below amortized cost. This guidance is effective for fiscal years beginning after December 15, 2019 and interim periods within those fiscal years. The Company does not plan to early adopt this guidance and will adopt this guidance on January 1, 2020. A cross-functional team from Finance, Credit, and IT is leading the implementation efforts to evaluate the impact of this guidance on the Company’s Consolidated Financial Statements, internal systems, accounting policies, processes and related internal controls. To date, we have selected a software solution to assist us with the initial and on-going requirements of the new guidance and are currently in the early stages of implementing the software. We have engaged third-party experts and specialists, where necessary, to assist with the implementation efforts. We continue to perform due diligence on acceptable methodologies under the guidance, as well as evaluate the potential effects to our accounting policies, processes and related internal controls. Our review of this guidance to date suggests that adoption may materially increase the allowance for loan losses and decrease capital levels; however, the extent of these impacts will depend on the asset quality of the portfolio, macroeconomic conditions, and significant estimates and judgments made by management at the time of adoption. In January 2017, the FASB issued ASU 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment . ASU 2017-04 simplifies the measurement of goodwill impairment by removing the hypothetical purchase price allocation. The new guidance requires an impairment of goodwill be measured as the amount by which a reporting unit’s carrying value exceeds its fair value, up to the amount of goodwill recorded. The guidance is effective in annual and interim periods in fiscal years beginning after December 15, 2019. Early adoption is permitted for goodwill impairment tests with measurement dates after January 1, 2017, using the prospective method of adoption. The Company does not expect the application of this guidance to have a material impact on its Consolidated Financial Statements. In March 2017, the FASB issued ASU No. 2017-08, Premium Amortization on Purchased Callable Debt Securities . The new guidance requires the amortization period for certain non-contingent callable debt securities held at a premium to end at the earliest call date of the debt security. If the call option is not exercised at the earliest call date, the guidance requires the debt security's effective yield to be reset based on the contractual payment terms of the debt security. The guidance is effective in annual and interim periods in fiscal years beginning after December 15, 2018. Early adoption is permitted. Use of the modified retrospective method, with a cumulative-effect adjustment to retained earnings is required. In the period of adoption, a change in accounting principle disclosure is required. The Company does not expect the application of this guidance to have a material impact on its Consolidated Financial Statements. In August 2017, the FASB issued ASU No. 2017-12, Targeted Improvements to Accounting for Hedging Activities (Topic 815) . The new guidance changes both the designation and measurement guidance for qualifying hedging relationships and simplifies the presentation of hedge results. Specifically, the guidance eliminates the requirement to separately measure and report hedge ineffectiveness and also aligns the recognition and presentation of the effects of the hedging instrument and the hedged item in the financial statements. Further, the new guidance provides entities the ability to apply hedge accounting to additional hedging strategies as well as permits a one-time reclassification of eligible to be hedged instruments from held to maturity to available for sale upon adoption. The guidance is effective in annual and interim periods beginning after December 15, 2018. Early adoption is permitted. Adoption using the modified retrospective approach is required for hedging relationships that exist as of the date of adoption; presentation and disclosure requirements are applied prospectively. The Company does not expect the application of this guidance to have a material impact on its Consolidated Financial Statements, except for the one-time reclassification, if elected. In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement Disclosure Framework, which amends ASC 820 - Fair Value Measurement . The ASU modifies, adds and removes certain disclosures aimed to improve the overall usefulness of the disclosure requirements for fair value measurements. The guidance is effective in annual and interim periods in fiscal years beginning after December 15, 2019. Early adoption is permitted. Adoption is required on both a prospective and retrospective basis depending on the amendment. The Company does not expect the application of this guidance to have a material impact on its Consolidated Financial Statements. In August 2018, the FASB issued ASU No. 2018-14, Compensation-Retirement Benefits - Defined Benefit Plans-General (Topic 715) which applies to all employers that provide defined benefit pension or other postretirement benefit plans for their employees. The ASU modifies, adds and removes certain disclosures aimed to improve the overall usefulness of the disclosure requirements to financial statement users. The guidance is effective for annual periods beginning after December 15, 2020. Early adoption is permitted. Use of the retrospective method is required. The Company does not expect the application of this guidance to have a material impact on its Consolidated Financial Statements. In August 2018, the FASB issued ASU No. 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Topic 350). The new guidance provides clarity on capitalizing and expensing implementation costs for cloud computing arrangements in a service contract. If an implementation cost is capitalized, the cost should be recognized over the noncancellable term and periodically assessed for impairment. The guidance is effective in annual and interim periods in fiscal years beginning after December 15, 2019. Early adoption is permitted. Adoption should be applied retrospectively or prospectively to all implementation costs incurred after the date of adoption. Our preliminary review of this guidance to date suggests that adoption may result in a material amount of implementation costs being deferred; however, the extent of the impact will depend on the cloud computing implementations occurring at the time of adoption.

NONINTEREST INCOME (Tables)

NONINTEREST INCOME (Tables)	9 Months Ended
	Sep. 30, 2018
Revenue from Contract with Customer [Abstract]
Schedule of Credit/debit Card and ATM Income	The following table presents the components of credit/debit card and ATM income: Three Months Ended September 30, Nine Months Ended September 30, (Dollars in thousands) 2018 2017 2018 2017 Bailment fees $ 7,188 $ 5,603 $ 19,869 $ 15,467 Interchange fees 3,766 3,469 11,073 10,164 Other card and ATM fees 285 278 811 775 Total credit/debit card and ATM income $ 11,239 $ 9,350 $ 31,753 $ 26,406
Schedule of Investment Management and Fiduciary Income	The following table presents the components of investment management and fiduciary income: Three Months Ended September 30, Nine Months Ended September 30, (Dollars in thousands) 2018 2017 2018 2017 Trust fees $ 5,932 $ 5,044 $ 17,298 $ 14,317 Wealth management and advisory fees 4,097 3,765 12,164 11,366 Total investment management and fiduciary income $ 10,029 $ 8,809 $ 29,462 $ 25,683
Schedule of Deposit Service Charges	The following table presents the components of deposit service charges: Three Months Ended September 30, Nine Months Ended September 30, (Dollars in thousands) 2018 2017 2018 2017 Service fees $ 2,663 $ 2,603 $ 7,877 $ 7,526 Return and overdraft fees 1,885 1,973 5,662 5,660 Other deposit service fees 122 119 425 466 Total deposit service charges $ 4,670 $ 4,695 $ 13,964 $ 13,652
Schedule of Other Income	The following table presents the components of other income: Three Months Ended September 30, Nine Months Ended September 30, (Dollars in thousands) 2018 2017 2018 2017 Managed service fees $ 3,169 $ 2,894 $ 9,100 $ 8,184 Currency preparation 863 765 2,406 2,185 ATM insurance 586 715 1,781 2,131 Miscellaneous products and services 2,041 1,692 6,391 4,812 Total other income $ 6,659 $ 6,066 $ 19,678 $ 17,312

EARNINGS PER SHARE (Tables)

EARNINGS PER SHARE (Tables)	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
Computation of Basic and Diluted Earnings Per Share	The following table shows the computation of basic and diluted earnings per share: Three Months Ended September 30, Nine Months Ended September 30, (Dollars and shares in thousands, except per share data) 2018 2017 2018 2017 Numerator: Net income $ 38,935 $ 20,569 $ 105,025 $ 60,076 Denominator: Weighted average basic shares 31,800 31,420 31,599 31,424 Dilutive potential common shares 548 848 663 856 Weighted average fully diluted shares $ 32,348 $ 32,268 $ 32,262 $ 32,280 Earnings per share: Basic $ 1.22 $ 0.65 $ 3.32 $ 1.91 Diluted $ 1.20 $ 0.64 $ 3.26 $ 1.86 Outstanding common stock equivalents having no dilutive effect 11 — 16 5

INVESTMENT SECURITIES (Tables)

INVESTMENT SECURITIES (Tables)	9 Months Ended
	Sep. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Schedule of Amortized Cost and Estimated Fair Value of Available-for-Sale and Held-to-Maturity Investment Securities	The following tables detail the amortized cost and the estimated fair value of our investments in available-for-sale and held-to-maturity debt securities as well as our equity investments. None of our investments in debt securities are classified as trading. September 30, 2018 (Dollars in thousands) Amortized Cost Gross Unrealized Gain Gross Unrealized Loss Fair Value Available-for-Sale Debt Securities CMO $ 311,507 $ — $ 11,477 $ 300,030 FNMA MBS 571,686 — 22,948 548,738 FHLMC MBS 116,532 2 4,112 112,422 GNMA MBS 37,180 72 1,311 35,941 $ 1,036,905 $ 74 $ 39,848 $ 997,131 Held-to-Maturity Debt Securities (1) State and political subdivisions $ 152,577 $ 55 $ 2,049 $ 150,583 Equity Investments (2) Visa Class B shares $ 13,918 $ 17,865 $ — $ 31,783 Other equity investments 3,300 — — 3,300 $ 17,218 $ 17,865 $ — $ 35,083 (1) Held-to–maturity securities transferred from available-for-sale are included in held-to-maturity at fair value at the time of transfer. The amortized cost of held-to-maturity securities included net unrealized gains of $1.2 million at September 30, 2018 , related to securities transferred, which are offset in Accumulated other comprehensive loss, net of tax. (2) Equity investments are included in Other investments in the unaudited Consolidated Statements of Financial Condition. December 31, 2017 (Dollars in thousands) Amortized Cost Gross Gross Fair Available-for-Sale Debt Securities CMO $ 250,592 $ 88 $ 4,141 $ 246,539 FNMA MBS 479,218 941 6,172 473,987 FHLMC MBS 88,681 118 924 87,875 GNMA MBS 29,300 209 411 29,098 $ 847,791 $ 1,356 $ 11,648 $ 837,499 Held-to-Maturity Debt Securities (1) State and political subdivisions $ 161,186 $ 1,758 $ 91 $ 162,853 Equity Investments (2)(3) Other equity investments $ 643 $ — $ 20 $ 623 $ 643 $ — $ 20 $ 623 (1) Held-to–maturity securities transferred from available-for-sale are included in held-to-maturity at fair value at the time of transfer. The amortized cost of held-to-maturity securities included net unrealized gains of $1.6 million at December 31, 2017 , related to securities transferred, which are offset in Accumulated other comprehensive loss, net of tax. (2) Equity investments are included in Other investments in the unaudited Consolidated Statements of Financial Condition. (3) These municipal securities were sold during the second quarter of 2018.
Schedule of Maturities of Investment Securities Available-for-Sale and Held-to-Maturity	The scheduled maturities of our available-for-sale debt securities at September 30, 2018 and December 31, 2017 are presented in the table below: Available for Sale Amortized Fair (Dollars in thousands) Cost Value September 30, 2018 Within one year $ — $ — After one year but within five years 19,792 19,160 After five years but within ten years 170,009 159,754 After ten years 847,104 818,217 $ 1,036,905 $ 997,131 December 31, 2017 Within one year $ — $ — After one year but within five years 20,051 19,825 After five years but within ten years 179,812 175,583 After ten years 647,928 642,091 $ 847,791 $ 837,499 The scheduled maturities of our held-to-maturity debt securities at September 30, 2018 and December 31, 2017 are presented in the table below: Held to Maturity Amortized Fair (Dollars in thousands) Cost Value September 30, 2018 Within one year $ 1,027 $ 1,023 After one year but within five years 6,636 6,599 After five years but within ten years 29,148 28,902 After ten years 115,766 114,059 $ 152,577 $ 150,583 December 31, 2017 Within one year $ 322 $ 320 After one year but within five years 5,895 5,894 After five years but within ten years 18,751 18,873 After ten years 136,218 137,766 $ 161,186 $ 162,853
Schedule of Investment Securities' Gross Unrealized Losses and Fair Value by Investment Category	For debt securities with unrealized losses, the table below shows our gross unrealized losses and fair value by investment category and length of time that individual debt securities were in a continuous unrealized loss position at September 30, 2018 . Duration of Unrealized Loss Position Less than 12 months 12 months or longer Total Fair Unrealized Fair Unrealized Fair Unrealized (Dollars in thousands) Value Loss Value Loss Value Loss Available-for-sale debt securities: CMO $ 138,346 $ 2,826 $ 161,684 $ 8,651 $ 300,030 $ 11,477 FNMA MBS 303,994 8,047 244,744 14,901 548,738 22,948 FHLMC MBS 55,386 1,271 52,514 2,841 107,900 4,112 GNMA MBS 19,329 504 13,419 807 32,748 1,311 Total temporarily impaired investments $ 517,055 $ 12,648 $ 472,361 $ 27,200 $ 989,416 $ 39,848 Held-to-maturity debt securities: State and political subdivisions $ 150,060 $ 2,013 $ 523 $ 36 $ 150,583 $ 2,049 Total temporarily impaired investments $ 150,060 $ 2,013 $ 523 $ 36 $ 150,583 $ 2,049 For debt investment securities with unrealized losses, the table below shows our gross unrealized losses and fair value by investment category and length of time that individual debt securities were in a continuous unrealized loss position at December 31, 2017 . Duration of Unrealized Loss Position Less than 12 months 12 months or longer Total Fair Unrealized Fair Unrealized Fair Unrealized (Dollars in thousands) Value Loss Value Loss Value Loss Available-for-sale debt securities: CMO $ 146,726 $ 1,820 $ 77,149 $ 2,321 $ 223,875 $ 4,141 FNMA MBS 204,921 1,479 126,342 4,693 331,263 6,172 FHLMC MBS 42,514 269 21,405 655 63,919 924 GNMA MBS 4,615 56 14,782 355 19,397 411 Total temporarily impaired investments $ 398,776 $ 3,624 $ 239,678 $ 8,024 $ 638,454 $ 11,648 Held-to-maturity debt securities: State and political subdivisions $ 23,404 $ 59 $ 5,625 $ 32 $ 29,029 $ 91 Total temporarily impaired investments $ 23,404 $ 59 $ 5,625 $ 32 $ 29,029 $ 91 Other equity investments $ — $ — $ 624 $ 20 $ 624 $ 20

LOANS (Tables)

LOANS (Tables)	9 Months Ended
	Sep. 30, 2018
Receivables [Abstract]
Summary of Loan Portfolio by Category	The following table shows our loan portfolio by category: (Dollars in thousands) September 30, 2018 December 31, 2017 Commercial and industrial $ 1,506,675 $ 1,464,554 Owner-occupied commercial 1,085,404 1,079,247 Commercial mortgages 1,133,281 1,187,705 Construction 333,487 281,608 Residential (1) 223,308 253,301 Consumer 653,704 558,493 4,935,859 4,824,908 Less: Deferred fees, net 7,911 7,991 Allowance for loan losses 41,812 40,599 Net loans $ 4,886,136 $ 4,776,318 (1) Includes reverse mortgages at fair value of $16.6 million at September 30, 2018 and $19.8 million at December 31, 2017 .
Schedule of Outstanding Principal Balance and Carrying Amounts for Acquired Credit-Impaired Loans	The following table shows the outstanding principal balance and carrying amounts for acquired credit impaired loans for which the Company applies ASC 310-30 as of the dates indicated: (Dollars in thousands) September 30, 2018 December 31, 2017 Outstanding principal balance $ 21,534 $ 27,034 Carrying amount 17,264 21,295 Allowance for loan losses 229 358
Summary of Changes in Accretable Yield on Acquired Credit Impaired Loans	The following table presents the changes in accretable yield on the acquired credit impaired loans for the nine months ended September 30, 2018 : Three Months Ended September 30, Nine Months Ended September 30, (Dollars in thousands) 2018 2017 2018 2017 Balance at beginning of period $ 2,925 $ 4,603 $ 3,035 $ 5,150 Accretion (433 ) (583 ) (1,351 ) (2,158 ) Reclassification from nonaccretable difference 2 3 1,080 1,246 Additions/adjustments (52 ) (878 ) (322 ) (1,089 ) Disposals — (341 ) — (345 ) Balance at end of period $ 2,442 $ 2,804 $ 2,442 $ 2,804

ALLOWANCE FOR LOAN LOSSES AND_2

ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY INFORMATION (Tables)	9 Months Ended
	Sep. 30, 2018
Receivables [Abstract]
Schedule of Allowance for Loan Losses and Loan Balances	The following tables provide the activity of our allowance for loan losses and loan balances for the three and nine months ended September 30, 2018 : (Dollars in thousands) Commercial Owner-occupied Commercial Commercial Mortgages Construction Residential (1) Consumer Total Three months ended September 30, 2018 Allowance for loan losses Beginning balance $ 15,842 $ 5,284 $ 6,951 $ 3,289 $ 1,519 $ 8,152 $ 41,037 Charge-offs (1,761 ) — — (1,475 ) — (567 ) (3,803 ) Recoveries 621 16 52 1 28 144 862 Provision (credit) 1,947 273 (598 ) 1,657 (71 ) 626 3,834 Provision (credit) for acquired loans (82 ) — (21 ) — (1 ) (14 ) (118 ) Ending balance $ 16,567 $ 5,573 $ 6,384 $ 3,472 $ 1,475 $ 8,341 $ 41,812 Nine months ended September 30, 2018 Allowance for loan losses Beginning balance $ 16,732 $ 5,422 $ 5,891 $ 2,861 $ 1,798 $ 7,895 $ 40,599 Charge-offs (6,861 ) (351 ) (48 ) (1,475 ) (54 ) (1,857 ) (10,646 ) Recoveries 1,060 28 189 3 117 598 1,995 Provision (credit) 5,730 419 356 2,106 (382 ) 1,711 9,940 Provision (credit) for acquired loans (94 ) 55 (4 ) (23 ) (4 ) (6 ) (76 ) Ending balance $ 16,567 $ 5,573 $ 6,384 $ 3,472 $ 1,475 $ 8,341 $ 41,812 Period-end allowance allocated to: Loans individually evaluated for impairment $ 3,970 $ 9 $ — $ 444 $ 570 $ 171 $ 5,164 Loans collectively evaluated for impairment 12,517 5,546 6,300 3,019 870 8,167 36,419 Acquired loans evaluated for impairment 80 18 84 9 35 3 229 Ending balance $ 16,567 $ 5,573 $ 6,384 $ 3,472 $ 1,475 $ 8,341 $ 41,812 Period-end loan balances: Loans individually evaluated for impairment (2) $ 19,910 $ 2,829 $ 6,502 $ 2,903 $ 11,479 $ 8,256 $ 51,879 Loans collectively evaluated for impairment 1,387,143 958,356 961,345 322,822 134,074 620,727 4,384,467 Acquired nonimpaired loans 97,552 119,403 156,483 7,025 60,407 24,568 465,438 Acquired impaired loans 2,070 4,816 8,951 737 766 153 17,493 Ending balance (3) $ 1,506,675 $ 1,085,404 $ 1,133,281 $ 333,487 $ 206,726 $ 653,704 $ 4,919,277 (1) Period-end loan balance excludes reverse mortgages at fair value of $16.6 million . (2) The difference between this amount and nonaccruing loans represents accruing troubled debt restructured loans of $15.2 million for the period ending September 30, 2018 . Accruing troubled debt restructured loans are considered impaired loans. (3) Ending loan balances do not include net deferred fees. The following table provides the activity of the allowance for loan losses and loan balances for the three and nine months ended September 30, 2017 : (Dollars in thousands) Commercial Owner - occupied Commercial Commercial Mortgages Construction Residential (1) Consumer Total Three months ended September 30, 2017 Allowance for loan losses Beginning balance $ 14,224 $ 5,816 $ 7,335 $ 3,432 $ 2,050 $ 7,148 $ 40,005 Charge-offs (1,603 ) (104 ) (1,196 ) (215 ) (59 ) (575 ) (3,752 ) Recoveries 417 12 16 301 11 295 1,052 Provision (credit) 2,128 (96 ) (231 ) 427 (49 ) 644 2,823 Provision for acquired loans (7 ) 104 (5 ) (28 ) 9 — 73 Ending balance $ 15,159 $ 5,732 $ 5,919 $ 3,917 $ 1,962 $ 7,512 $ 40,201 Nine months ended September 30, 2017 Allowance for loan losses Beginning balance $ 13,339 $ 6,588 $ 8,915 $ 2,838 $ 2,059 $ 6,012 $ 39,751 Charge-offs (3,787 ) (296 ) (1,702 ) (346 ) (112 ) (2,606 ) (8,849 ) Recoveries 820 120 69 305 141 943 2,398 Provision (credit) 4,597 (802 ) (1,602 ) 1,056 (146 ) 3,177 6,280 Provision for acquired loans 190 122 239 64 20 (14 ) 621 Ending balance $ 15,159 $ 5,732 $ 5,919 $ 3,917 $ 1,962 $ 7,512 $ 40,201 Period-end allowance allocated to: Loans individually evaluated for impairment $ 1,220 $ — $ 131 $ — $ 858 $ 198 $ 2,407 Loans collectively evaluated for impairment 13,646 5,699 5,638 3,881 1,078 7,310 37,252 Acquired loans evaluated for impairment 293 33 150 36 26 4 542 Ending balance $ 15,159 $ 5,732 $ 5,919 $ 3,917 $ 1,962 $ 7,512 $ 40,201 Period-end loan balances: Loans individually evaluated for impairment (2) $ 12,845 $ 3,346 $ 9,012 $ 1,839 $ 14,060 $ 7,409 $ 48,511 Loans collectively evaluated for impairment 1,249,027 941,296 943,699 271,447 148,715 472,488 4,026,672 Acquired nonimpaired loans 120,987 144,710 194,394 19,085 77,154 40,136 596,466 Acquired impaired loans 5,235 7,401 9,969 946 788 243 24,582 Ending balance (3) $ 1,388,094 $ 1,096,753 $ 1,157,074 $ 293,317 $ 240,717 $ 520,276 $ 4,696,231 (1) Period-end loan balance excludes reverse mortgages at fair value of $21.4 million . (2) The difference between this amount and nonaccruing loans represents accruing troubled debt restructured loans of $14.9 million for the period ending September 30, 2017 . Accruing troubled debt restructured loans are considered impaired loans. (3) Ending loan balances do not include net deferred fees.
Summary of Nonaccrual and Past Due Loans	The following tables show our nonaccrual and past due loans at the dates indicated: September 30, 2018 (Dollars in thousands) 30–59 Days Past Due and Still Accruing 60–89 Days Past Due and Still Accruing Greater Than 90 Days Past Due and Still Accruing Total Past Due And Still Accruing Accruing Current Balances Acquired Impaired Loans Nonaccrual Loans Total Loans Commercial $ 1,324 $ 144 $ 2 $ 1,470 $ 1,484,007 $ 2,070 $ 19,128 $ 1,506,675 Owner-occupied commercial 1,526 782 — 2,308 1,075,451 4,816 2,829 1,085,404 Commercial mortgages 674 263 — 937 1,117,184 8,951 6,209 1,133,281 Construction — — — — 329,847 737 2,903 333,487 Residential (1) 2,336 879 24 3,239 199,456 766 3,265 206,726 Consumer 612 174 185 971 650,226 153 2,354 653,704 Total (2) $ 6,472 $ 2,242 $ 211 $ 8,925 $ 4,856,171 $ 17,493 $ 36,688 $ 4,919,277 % of Total Loans 0.13 % 0.05 % — % 0.18 % 98.72 % 0.36 % 0.75 % 100 % (1) Residential accruing current balances excludes reverse mortgages at fair value of $16.6 million . (2) The balances above include a total of $465.4 million acquired non-impaired loans. December 31, 2017 (Dollars in thousands) 30–59 Days Past Due and Still Accruing 60–89 Days Past Due and Still Accruing Greater Total Past Accruing Current Balances Acquired Impaired Loans Nonaccrual Loans Total Loans Commercial $ 1,050 $ — $ — $ 1,050 $ 1,440,291 $ 4,156 $ 19,057 $ 1,464,554 Owner-occupied commercial 2,069 233 — 2,302 1,067,488 5,803 3,654 1,079,247 Commercial mortgages 320 90 — 410 1,171,701 9,724 5,870 1,187,705 Construction — — — — 278,864 940 1,804 281,608 Residential (1) 2,058 731 356 3,145 225,434 784 4,124 233,487 Consumer 1,117 463 105 1,685 554,634 247 1,927 558,493 Total (2) $ 6,614 $ 1,517 $ 461 $ 8,592 $ 4,738,412 $ 21,654 $ 36,436 $ 4,805,094 % of Total Loans 0.14 % 0.03 % 0.01 % 0.18 % 98.61 % 0.45 % 0.76 % 100 % (1) Residential accruing current balances excludes reverse mortgages, at fair value of $19.8 million . (2) The balances above include a total of $565.5 million acquired non-impaired loans
Analysis of Impaired Loans	The following tables provide an analysis of our impaired loans at September 30, 2018 and December 31, 2017 : September 30, 2018 (Dollars in thousands) Ending Loan Balances Loans with No Related Reserve (1) Loans with Related Reserve Related Reserve Contractual Principal Balances Average Loan Balances Commercial $ 20,211 $ 8,713 $ 11,498 $ 4,050 $ 23,609 $ 18,479 Owner-occupied commercial 4,502 2,553 1,949 27 4,766 5,099 Commercial mortgages 8,114 6,502 1,612 84 16,816 8,740 Construction 3,132 122 3,010 453 5,171 4,808 Residential 11,690 7,509 4,181 605 14,109 13,249 Consumer 8,289 7,264 1,025 174 9,015 7,862 Total (2) $ 55,938 $ 32,663 $ 23,275 $ 5,393 $ 73,486 $ 58,237 (1) Reflects loan balances at or written down to their remaining book balance. (2) The above includes acquired impaired loans totaling $4.1 million in the ending loan balance and $4.5 million in the contractual principal balance. December 31, 2017 (Dollars in thousands) Ending Loan Balances Loans with No Related (1) Loans with Related Reserve Related Reserve Contractual Principal Balances Average Loan Balances Commercial $ 20,842 $ 3,422 $ 17,420 $ 3,861 $ 23,815 $ 15,072 Owner-occupied commercial 5,374 3,654 1,720 12 5,717 5,827 Commercial mortgages 7,598 4,487 3,111 112 16,658 12,630 Construction 6,292 6,023 269 33 6,800 4,523 Residential 14,181 8,282 5,899 796 17,015 14,533 Consumer 7,819 6,304 1,515 203 8,977 8,158 Total (2) $ 62,106 $ 32,172 $ 29,934 $ 5,017 $ 78,982 $ 60,743 (1) Reflects loan balances at or written down to their remaining book balance. (2) The above includes acquired impaired loans totaling $5.8 million in the ending loan balance and $6.8 million in the contractual principal balance.
Schedule of Commercial Credit Exposure	The following tables provide an analysis of loans by portfolio segment based on the credit quality indicators used to determine the Allowance for Loan Loss. Commercial Credit Exposure September 30, 2018 Commercial and Industrial Owner-occupied Commercial Commercial Mortgages Construction Total Commercial (1) (Dollars in thousands) Amount % Risk Rating: Special mention $ 21,315 $ 32,123 $ 10,806 $ — $ 64,244 Substandard: Accrual 17,247 24,662 1,546 169 43,624 Nonaccrual 15,158 2,820 6,209 2,460 26,647 Doubtful 3,970 9 — 444 4,423 Total Special Mention and Substandard 57,690 59,614 18,561 3,073 138,938 3 % Acquired impaired 2,070 4,816 8,951 737 16,574 1 % Pass 1,446,915 1,020,974 1,105,769 329,677 3,903,335 96 % Total $ 1,506,675 $ 1,085,404 $ 1,133,281 $ 333,487 $ 4,058,847 100 % (1) Table includes $380.5 million of acquired non-impaired loans as of September 30, 2018 . December 31, 2017 Commercial and Industrial Owner-occupied Commercial Commercial Mortgages Construction Total Commercial (1) (Dollars in thousands) Amount % Risk Rating: Special mention $ 22,789 $ 16,783 $ — $ — $ 39,572 Substandard: Accrual 34,332 19,386 1,967 4,965 60,650 Nonaccrual 15,370 3,654 5,852 1,804 26,680 Doubtful 3,687 — 18 — 3,705 Total Special Mention and Substandard 76,178 39,823 7,837 6,769 130,607 3 % Acquired impaired 4,156 5,803 9,724 940 20,623 1 % Pass 1,384,220 1,033,621 1,170,144 273,899 3,861,884 96 % Total $ 1,464,554 $ 1,079,247 $ 1,187,705 $ 281,608 $ 4,013,114 100 % (1) Table includes $457.3 million of acquired non-impaired loans as of December 31, 2017 .
Schedule of Consumer Credit Exposure	Residential and Consumer Credit Exposure Residential (2) Consumer Total Residential and Consumer (3) September 30, December 31, September 30, December 31, September 30, 2018 December 31, 2017 (Dollars in thousands) 2018 2017 2018 2017 Amount Percent Amount Percent Nonperforming (1) $ 11,479 $ 13,778 $ 8,256 $ 7,588 $ 19,735 2 % $ 21,366 3 % Acquired impaired loans 766 784 153 247 919 — % 1,031 — % Performing 194,481 218,925 645,295 550,658 839,776 98 % 769,583 97 % Total $ 206,726 $ 233,487 $ 653,704 $ 558,493 $ 860,430 100 % $ 791,980 100 % (1) Includes $14.1 million as of September 30, 2018 and $15.3 million as of December 31, 2017 of troubled debt restructured mortgages and home equity installment loans that are performing in accordance with the loans’ modified terms and are accruing interest. (2) Residential performing loans excludes $16.6 million and $19.8 million of reverse mortgages at fair value as of September 30, 2018 and December 31, 2017 , respectively. (3) Total includes $85.0 million and $108.2 million in acquired non-impaired loans as of September 30, 2018 and December 31, 2017 , respectively.
Schedule of Loans Identified as Troubled Debt Restructurings During Periods Indicated	The following table presents information regarding the types of loan modifications made for the nine months ended September 30, 2018 and 2017: September 30, 2018 September 30, 2017 Contractual payment reduction and term extension Maturity Date Extension Discharged in bankruptcy Other (1) Total Contractual payment reduction and term extension Maturity Date Extension Discharged in bankruptcy Other (1) Total Commercial 6 — — — 6 1 1 — — 2 Owner-occupied commercial — — — — — — 1 — — 1 Commercial Mortgages 2 1 — — 3 — — — — — Construction — 1 — — 1 — 2 — 1 3 Residential 4 — — — 4 2 — 3 — 5 Consumer 8 1 4 2 15 1 — 11 6 18 Total 20 3 4 2 29 4 4 14 7 29 (1) Other includes underwriting exceptions. The following table presents loans identified as TDRs during the three and nine months ended September 30, 2018 and 2017 . Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (Dollars in thousands) Pre Modification Post Modification Pre Modification Post Modification Pre Modification Post Modification Pre Modification Post Modification Commercial $ 320 $ 320 $ — $ — $ 5,102 $ 5,102 $ 781 $ 781 Owner-occupied commercial — — — — — — 3,071 3,071 Commercial mortgages 168 168 — — 2,190 2,190 — — Construction — — — — 920 920 1,836 1,836 Residential — — 1,058 1,058 469 469 1,300 1,300 Consumer 113 113 609 609 1,236 1,236 1,867 1,867 Total $ 601 $ 601 $ 1,667 $ 1,667 $ 9,917 $ 9,917 $ 8,855 $ 8,855 The following table presents the balance of TDRs as of the indicated dates: (Dollars in thousands) September 30, 2018 December 31, 2017 Performing TDRs $ 15,192 $ 20,061 Nonperforming TDRs 14,604 9,627 Total TDRs $ 29,796 $ 29,688

DEPOSITS (Tables)

DEPOSITS (Tables)	9 Months Ended
	Sep. 30, 2018
Banking and Thrift [Abstract]
Deposits By Category	The following table shows our deposits by category: (Dollars in thousands) September 30, 2018 December 31, 2017 Noninterest-bearing: Noninterest demand $ 1,515,336 $ 1,420,760 Total noninterest-bearing $ 1,515,336 $ 1,420,760 Interest-bearing: Interest-bearing demand $ 1,091,546 $ 1,071,512 Savings 535,344 549,744 Money market 1,581,684 1,347,146 Customer time deposits 712,859 629,071 Brokered deposits 287,147 229,371 Total interest-bearing 4,208,580 3,826,844 Total deposits $ 5,723,916 $ 5,247,604

ASSOCIATE BENEFIT PLANS (Tables

ASSOCIATE BENEFIT PLANS (Tables)	9 Months Ended
	Sep. 30, 2018
Postemployment Benefits [Abstract]
Schedule of Net Periodic Benefit Cost Components of Postretirement Benefits	The following table presents the components of net periodic benefit cost related to our postretirement medical benefits plan measured at January 1, 2018 and 2017. Three months ended September 30, Nine months ended September 30, (Dollars in thousands) 2018 2017 2018 2017 Service cost $ 15 $ 11 $ 45 $ 40 Interest cost 18 16 53 54 Prior service cost amortization (19 ) (19 ) (57 ) (57 ) Net gain recognition (11 ) (18 ) (34 ) (52 ) Net periodic benefit cost $ 3 $ (10 ) $ 7 $ (15 ) the Alliance Associate Pension Plan measured at January 1, 2018 and 2017. Three months ended September 30, Nine months ended September 30, (Dollars in thousands) 2018 2017 2018 2017 Service cost $ 10 $ 10 $ 30 $ 30 Interest cost 75 75 222 225 Expected return on plan assets (138 ) (135 ) (410 ) (405 ) Prior service cost amortization — — — — Net gain recognition — — — — Net periodic benefit cost $ (53 ) $ (50 ) $ (158 ) $ (150 )

FAIR VALUE DISCLOSURES OF FIN_2

FAIR VALUE DISCLOSURES OF FINANCIAL ASSETS AND LIABILITIES (Tables)	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Schedule of Financial Instruments Carried at Fair Value	The following tables present financial instruments carried at fair value as of September 30, 2018 and December 31, 2017 by level in the valuation hierarchy (as described above): September 30, 2018 (Dollars in thousands) Quoted Prices in Active Markets for Identical Asset (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Fair Value Assets measured at fair value on a recurring basis: Available-for-sale securities: CMO $ — $ 300,030 $ — $ 300,030 FNMA MBS — 548,738 — 548,738 FHLMC MBS — 112,422 — 112,422 GNMA MBS — 35,941 — 35,941 Other assets — 977 — 977 Total assets measured at fair value on a recurring basis $ — $ 998,108 $ — $ 998,108 Liabilities measured at fair value on a recurring basis: Other liabilities $ — $ 4,781 $ — $ 4,781 Assets measured at fair value on a nonrecurring basis: Other investments (1) $ — $ — $ 35,083 $ 35,083 Other real estate owned — — 2,004 2,004 Loans held for sale — 35,855 — 35,855 Impaired loans, net — — 50,545 50,545 Total assets measured at fair value on a nonrecurring basis $ — $ 35,855 $ 87,632 $ 123,487 (1) See Note 1 for additional disclosures resulting from the Company's adoption of ASU 2016-01. December 31, 2017 (Dollars in thousands) Quoted Prices in Active Markets for Identical Asset (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Fair Value Assets measured at fair value on a recurring basis: Available-for-sale securities: CMO $ — $ 246,539 $ — $ 246,539 FNMA MBS — 473,987 — 473,987 FHLMC MBS — 87,875 — 87,875 GNMA MBS — 29,098 — 29,098 Other investments 623 — — 623 Other assets — 747 — 747 Total assets measured at fair value on a recurring basis $ 623 $ 838,246 $ — $ 838,869 Liabilities measured at fair value on a recurring basis: Other liabilities $ — $ 3,225 $ — $ 3,225 Assets measured at fair value on a nonrecurring basis Other real estate owned — — 2,503 2,503 Loans held for sale — 31,055 — 31,055 Impaired loans, net — — 57,089 57,089 Total assets measured at fair value on a nonrecurring basis $ — $ 31,055 $ 59,592 $ 90,647
Book Value and Estimated Fair Value of Financial Instruments	The book value and estimated fair value of our financial instruments are as follows: September 30, 2018 December 31, 2017 (Dollars in thousands) Fair Value Measurement Book Value Fair Value Book Value Fair Value Financial assets: Cash and cash equivalents Level 1 $ 711,372 $ 711,372 $ 723,866 $ 723,866 Investment securities available for sale See previous table 997,131 997,131 837,499 837,499 Investment securities held to maturity Level 2 152,577 150,583 161,186 162,853 Other investments Level 1,3 35,083 35,083 14,671 45,326 Loans, held for sale Level 2 35,855 35,855 31,055 31,055 Loans, net (1)(2) Level 2,3 4,835,591 4,802,841 4,719,229 4,699,458 Impaired loans, net Level 3 50,545 50,545 57,089 57,089 Stock in FHLB of Pittsburgh Level 2 16,540 16,540 31,284 31,284 Accrued interest receivable Level 2 21,331 21,331 19,405 19,405 Other assets Level 3 977 977 2,883 2,883 Financial liabilities: Deposits Level 2 5,723,916 5,685,435 5,247,604 4,848,588 Borrowed funds Level 2 545,089 538,395 937,806 937,605 Standby letters of credit Level 3 328 328 603 603 Accrued interest payable Level 2 7,119 7,119 1,037 1,037 Other liabilities Level 2 4,781 4,781 3,188 3,188 (1) Excludes impaired loans, net. (2) Includes reverse mortgage loans, which are categorized as Level 3.

DERIVATIVE FINANCIAL INSTRUME_2

DERIVATIVE FINANCIAL INSTRUMENTS (Tables)	9 Months Ended
	Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair Values of Derivative Instruments	The table below presents the fair value of our derivative financial instruments as well as their location on the unaudited Consolidated Statements of Financial Condition as of September 30, 2018 . Fair Values of Derivative Instruments (Dollars in thousands) Count Notional Balance Sheet Location Derivatives (Fair Value) Derivatives designated as hedging instruments: Interest rate products 3 $ 75,000 Other Liabilities $ (4,689 ) Total $ 75,000 $ (4,689 ) Derivatives not designated as hedging instruments: Interest rate lock commitments with customers 47,634 Other Assets $ 595 Interest rate lock commitments with customers 16,064 Other Liabilities (61 ) Forward sale commitments 44,840 Other Assets 382 Forward sale commitments 15,792 Other Liabilities (31 ) Total $ 124,330 $ 885 Total derivatives $ 199,330 $ (3,804 )
Summary of Company's Derivative Financial Instruments	The table below presents the effect of the derivative financial instruments on the unaudited Consolidated Statements of Income for the three and nine months ended September 30, 2018 and September 30, 2017 . Amount of (Loss) or Gain Recognized in OCI on Derivative (Effective Portion) Amount of (Loss) or Gain Recognized in OCI on Derivative (Effective Portion) Location of (Loss) or Gain Reclassified from Accumulated OCI into Income (Effective Portion) (Dollars in thousands) Three Months Ended September 30, Nine Months Ended September 30, Derivatives in Cash Flow Hedging Relationships 2018 2017 2018 2017 Interest Rate Products $ (109 ) $ 42 $ (1,119 ) $ 192 Interest income Total $ (109 ) $ 42 $ (1,119 ) $ 192 Amount of Gain or (Loss) Recognized in Income Amount of Gain or (Loss) Recognized in Income Location of Gain or (Loss) Recognized in Income (Dollars in thousands) Three Months Ended September 30, Nine Months Ended September 30, Derivatives Not Designated as a Hedging Instrument 2018 2017 2018 2017 Interest Rate Lock Commitments $ 192 $ — $ (104 ) $ — Mortgage banking activities, net Forward Sale Commitments (176 ) $ — (508 ) $ — Mortgage banking activities, net Total $ 16 $ — $ (612 ) $ —

SEGMENT INFORMATION (Tables)

SEGMENT INFORMATION (Tables)	9 Months Ended
	Sep. 30, 2018
Segment Reporting [Abstract]
Details of Segment Information	The following tables show segment results for the three and nine months ended September 30, 2018 and 2017 : Three Months Ended September 30, 2018 Three Months Ended September 30, 2017 (Dollars in thousands) WSFS Bank Cash ® Wealth Management Total WSFS Bank Cash ® Wealth Total Statements of Income External customer revenues: Interest income $ 72,836 $ — $ 2,579 $ 75,415 $ 62,748 $ — $ 2,262 $ 65,010 Noninterest income 18,524 13,026 10,351 41,901 12,102 11,212 9,127 32,441 Total external customer revenues 91,360 13,026 12,930 117,316 74,850 11,212 11,389 97,451 Inter-segment revenues: Interest income 4,002 — 3,020 7,022 2,537 — 2,235 4,772 Noninterest income 2,122 200 36 2,358 1,721 213 37 1,971 Total inter-segment revenues 6,124 200 3,056 9,380 4,258 213 2,272 6,743 Total revenue 97,484 13,226 15,986 126,696 79,108 11,425 13,661 104,194 External customer expenses: Interest expense 11,461 — 857 12,318 8,542 — 339 8,881 Noninterest expenses 44,922 8,133 (601 ) 52,454 39,546 7,048 7,569 54,163 Provision for loan losses 3,776 — (60 ) 3,716 3,065 — (169 ) 2,896 Total external customer expenses 60,159 8,133 196 68,488 51,153 7,048 7,739 65,940 Inter-segment expenses: Interest expense 3,020 2,885 1,117 7,022 2,235 1,856 681 4,772 Noninterest expenses 236 627 1,495 2,358 250 556 1,165 1,971 Total inter-segment expenses 3,256 3,512 2,612 9,380 2,485 2,412 1,846 6,743 Total expenses 63,415 11,645 2,808 77,868 53,638 9,460 9,585 72,683 Income before taxes $ 34,069 $ 1,581 $ 13,178 $ 48,828 $ 25,470 $ 1,965 $ 4,076 $ 31,511 Income tax provision 9,893 10,942 Consolidated net income $ 38,935 $ 20,569 Nine Months Ended September 30, 2018 Nine Months Ended September 30, 2017 (Dollars in thousands) WSFS Bank Cash ® Wealth Total WSFS Bank Cash ® Wealth Total Statements of Income External customer revenues: Interest income $ 207,725 $ — $ 7,454 $ 215,179 $ 181,670 $ — $ 6,500 $ 188,170 Noninterest income 57,175 36,707 30,473 124,355 34,318 31,403 26,488 92,209 Total external customer revenues 264,900 36,707 37,927 339,534 215,988 31,403 32,988 280,379 Inter-segment revenues: Interest income 10,535 — 8,053 18,588 6,780 — 6,735 13,515 Noninterest income 6,449 581 107 7,137 5,791 611 113 6,515 Total inter-segment revenues 16,984 581 8,160 25,725 12,571 611 6,848 20,030 Total revenue 281,884 37,288 46,087 365,259 228,559 32,014 39,836 300,409 External customer expenses: Interest expense 31,563 — 1,816 33,379 23,744 — 880 24,624 Noninterest expenses 126,862 23,357 13,478 163,697 117,288 19,774 21,334 158,396 Provision for loan losses 9,721 — 143 9,864 6,097 — 804 6,901 Total external customer expenses 168,146 23,357 15,437 206,940 147,129 19,774 23,018 189,921 Inter-segment expenses: Interest expense 8,053 7,460 3,075 18,588 6,735 4,843 1,937 13,515 Noninterest expenses 688 1,936 4,513 7,137 724 1,944 3,847 6,515 Total inter-segment expenses 8,741 9,396 7,588 25,725 7,459 6,787 5,784 20,030 Total expenses 176,887 32,753 23,025 232,665 154,588 26,561 28,802 209,951 Income before taxes $ 104,997 $ 4,535 $ 23,062 $ 132,594 $ 73,971 $ 5,453 $ 11,034 $ 90,458 Income tax provision 27,569 30,382 Consolidated net income $ 105,025 $ 60,076 The following table shows significant components of segment net assets as of September 30, 2018 and December 31, 2017 : September 30, 2018 December 31, 2017 (Dollars in thousands) WSFS Bank Cash ® Wealth Total WSFS Bank Cash ® Wealth Management Total Statements of Financial Condition Cash and cash equivalents $ 132,857 $ 564,915 $ 13,600 $ 711,372 $ 104,530 $ 611,385 $ 7,951 $ 723,866 Goodwill 145,808 — 20,199 166,007 145,808 — 20,199 166,007 Other segment assets 6,053,095 8,098 221,270 6,282,463 5,882,910 6,078 220,679 6,109,667 Total segment assets $ 6,331,760 $ 573,013 $ 255,069 $ 7,159,842 $ 6,133,248 $ 617,463 $ 248,829 $ 6,999,540 Capital expenditures $ 4,252 $ 340 $ 316 $ 4,908 $ 8,197 $ 184 $ 613 $ 8,994

CHANGE IN ACCUMULATED OTHER C_2

CHANGE IN ACCUMULATED OTHER COMPREHENSIVE LOSS (Tables)	9 Months Ended
	Sep. 30, 2018
Equity [Abstract]
Components of Accumulated Other Comprehensive (Loss) Income	Changes to accumulated other comprehensive loss by component are shown, net of taxes, in the following tables for the period indicated: (Dollars in thousands) Net change in investment securities available for sale Net change in investment securities held to maturity Net change in defined benefit plan Net change in fair value of derivatives used for cash flow hedges Total Balance, June 30, 2018 $ (24,186 ) $ 987 $ 894 $ (3,408 ) $ (25,713 ) Other comprehensive (loss) income before reclassifications (6,042 ) — 7 (109 ) (6,144 ) Less: Amounts reclassified from accumulated other comprehensive (loss) income — (107 ) (37 ) — (144 ) Net current-period other comprehensive loss (6,042 ) (107 ) (30 ) (109 ) (6,288 ) Balance, September 30, 2018 $ (30,228 ) $ 880 $ 864 $ (3,517 ) $ (32,001 ) Balance, June 30, 2017 $ (4,342 ) $ 1,194 $ 912 $ (1,622 ) $ (3,858 ) Other comprehensive income before reclassifications 1,289 — — 42 1,331 Less: Amounts reclassified from accumulated other comprehensive income (475 ) (99 ) (22 ) — (596 ) Net current-period other comprehensive (loss) income 814 (99 ) (22 ) 42 735 Balance, September 30, 2017 $ (3,528 ) $ 1,095 $ 890 $ (1,580 ) $ (3,123 ) Balance, December 31, 2017 $ (7,842 ) $ 1,223 $ 865 $ (2,398 ) $ (8,152 ) Other comprehensive (loss) income before reclassifications (22,370 ) — 15 (1,119 ) (23,474 ) Less: Amounts reclassified from accumulated other comprehensive (loss) income (16 ) (343 ) (16 ) — (375 ) Net current-period other comprehensive (loss) income (22,386 ) (343 ) (1 ) (1,119 ) (23,849 ) Balance, September 30, 2018 $ (30,228 ) $ 880 $ 864 $ (3,517 ) $ (32,001 ) Balance, December 31, 2016 $ (8,194 ) $ 1,392 $ 957 $ (1,772 ) $ (7,617 ) Other comprehensive income before reclassifications 5,802 — — 192 5,994 Less: Amounts reclassified from accumulated other comprehensive income (1,136 ) (297 ) (67 ) — (1,500 ) Net current-period other comprehensive income (loss) 4,666 (297 ) (67 ) 192 4,494 Balance, September 30, 2017 $ (3,528 ) $ 1,095 $ 890 $ (1,580 ) $ (3,123 )
Components of Other Comprehensive Income (Loss)	The unaudited Consolidated Statements of Income were impacted by components of other comprehensive income (loss) as shown in the table below: Three Months Ended September 30, Affected line item in unaudited Consolidated Statements of Income (Dollars in thousands) 2018 2017 Securities available for sale: Realized gains on securities transactions $ — $ (736 ) Securities gains, net Income taxes — 261 Income tax provision Net of tax $ — $ (475 ) Net unrealized holding gains on securities transferred between available-for-sale and held-to-maturity: Amortization of net unrealized gains to income during the period $ (142 ) $ (159 ) Interest and dividends on investment securities Income taxes 35 60 Income tax provision Net of tax $ (107 ) $ (99 ) Amortization of Defined Benefit Pension items: Prior service costs (credits) $ (19 ) $ (19 ) Actuarial gains (11 ) (18 ) Total before tax $ (30 ) $ (37 ) Salaries, benefits and other compensation Income taxes (7 ) 15 Income tax provision Net of tax (37 ) (22 ) Total reclassifications $ (144 ) $ (596 ) Nine Months Ended Affected line item in unaudited Consolidated Statements of Operations September 30, 2018 2017 Securities available-for-sale: Realized gains on securities transactions $ (21 ) $ (1,764 ) Securities gains, net Income taxes 5 628 Income tax provision Net of tax $ (16 ) $ (1,136 ) Net unrealized holding gains on securities transferred between available-for-sale and held-to-maturity: Amortization of net unrealized gains to income during the period $ (451 ) $ (478 ) Interest and dividends on investment securities Income taxes 108 181 Income tax provision Net of tax $ (343 ) $ (297 ) Amortization of defined benefit pension plan-related items: Prior service costs (credits) (1) $ 21 $ (57 ) Actuarial gains (34 ) (52 ) Total before tax $ (13 ) $ (109 ) Salaries, benefits and other compensation Income taxes (3 ) 42 Income tax provision Net of tax $ (16 ) $ (67 ) Total reclassifications $ (375 ) $ (1,500 ) (1) Prior service costs balance for the nine months ended September 30, 2018 includes a tax true-up adjustment of $0.1 million from March 31, 2018. Note that the tax true-up was made to the deferred tax asset with an offset to AOCI and does not affect the actual net periodic benefit costs of the pension plan.

BASIS OF PRESENTATION (Details)

BASIS OF PRESENTATION (Details)	3 Months Ended
	Mar. 31, 2019$ / shares	Sep. 30, 2018SubsidiaryOffice
Basis Of Presentation [Line Items]
Number of unconsolidated affiliate | Subsidiary		1
Number of banking offices		77
Scenario, Forecast
Basis Of Presentation [Line Items]
Shares issued per acquiree share, ratio	0.3013
Cash paid per acquiree share (in dollars per share) | $ / shares	$ 2.93
Delaware
Basis Of Presentation [Line Items]
Number of banking offices		46
Pennsylvania
Basis Of Presentation [Line Items]
Number of banking offices		29
Virginia
Basis Of Presentation [Line Items]
Number of banking offices		1
Nevada
Basis Of Presentation [Line Items]
Number of banking offices		1
WSFS Financial Corporation
Basis Of Presentation [Line Items]
Number of wholly-owned subsidiaries | Subsidiary		3

NONINTEREST INCOME - Credit_deb

NONINTEREST INCOME - Credit/debit card and ATM Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Credit/debit card and ATM income
Revenue from External Customer [Line Items]
Noninterest fee income	$ 11,239	$ 9,350	$ 31,753	$ 26,406
Bailment fees
Revenue from External Customer [Line Items]
Noninterest fee income	7,188	5,603	19,869	15,467
Interchange fees
Revenue from External Customer [Line Items]
Noninterest fee income	3,766	3,469	11,073	10,164
Other card and ATM fees
Revenue from External Customer [Line Items]
Noninterest fee income	$ 285	$ 278	$ 811	$ 775

NONINTEREST INCOME - Investment

NONINTEREST INCOME - Investment Management and Fiduciary Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Trust fees
Revenue from External Customer [Line Items]
Noninterest fee income	$ 5,932	$ 5,044	$ 17,298	$ 14,317
Wealth management and advisory fees
Revenue from External Customer [Line Items]
Noninterest fee income	4,097	3,765	12,164	11,366
Investment management and fiduciary income
Revenue from External Customer [Line Items]
Noninterest fee income	$ 10,029	$ 8,809	$ 29,462	$ 25,683

NONINTEREST INCOME - Deposit se

NONINTEREST INCOME - Deposit service charges (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Service fees
Revenue from External Customer [Line Items]
Deposit service charges	$ 2,663	$ 2,603	$ 7,877	$ 7,526
Return and overdraft fees
Revenue from External Customer [Line Items]
Deposit service charges	1,885	1,973	5,662	5,660
Other deposit service fees
Revenue from External Customer [Line Items]
Deposit service charges	122	119	425	466
Deposit service charges
Revenue from External Customer [Line Items]
Deposit service charges	$ 4,670	$ 4,695	$ 13,964	$ 13,652

NONINTEREST INCOME - Other inco

NONINTEREST INCOME - Other income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Managed service fees
Revenue from External Customer [Line Items]
Noninterest fee income	$ 3,169	$ 2,894	$ 9,100	$ 8,184
Currency preparation
Revenue from External Customer [Line Items]
Noninterest fee income	863	765	2,406	2,185
ATM insurance
Revenue from External Customer [Line Items]
Noninterest fee income	586	715	1,781	2,131
Miscellaneous products and services
Revenue from External Customer [Line Items]
Noninterest fee income	2,041	1,692	6,391	4,812
Other income
Revenue from External Customer [Line Items]
Noninterest fee income	$ 6,659	$ 6,066	$ 19,678	$ 17,312

EARNINGS PER SHARE (Details)

EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Numerator:
Net income	$ 38,935	$ 20,569	$ 105,025	$ 60,076
Denominator:
Weighted average basic shares (in shares)	31,800	31,420	31,599	31,424
Dilutive potential common shares (in shares)	548	848	663	856
Weighted average fully diluted shares (in shares)	32,348	32,268	32,262	32,280
Earnings per share:
Basic (in dollars per share)	$ 1.22	$ 0.65	$ 3.32	$ 1.91
Diluted (in dollars per share)	$ 1.20	$ 0.64	$ 3.26	$ 1.86
Outstanding common stock equivalents having no dilutive effect (in shares)	11	0	16	5

INVESTMENT SECURITIES - Additio

INVESTMENT SECURITIES - Additional Information (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018USD ($)secuirty	Sep. 30, 2017USD ($)	Sep. 30, 2018USD ($)secuirty	Sep. 30, 2017USD ($)	Dec. 31, 2017USD ($)
Gain (Loss) on Securities [Line Items]
Trading securities	$ 0		$ 0
Securities pledged as collateral	972,800,000		972,800,000		$ 688,200,000
Sale of investment securities available for sale			7,012,000	$ 415,486,000
Debt securities, available-for-sale, realized gain (less than)			100,000	1,900,000
Losses from sale of available-for-sale securities (less than during the current quarter end)			0	100,000
Proceeds from sale of equity securities			6,200,000	0
Realized gain on sale of equity investment	3,757,000	$ 0	3,757,000	$ 0
Realized losses on equity securities			0
Unamortized premiums			12,800,000		14,100,000
Unaccreted discounts			1,800,000		1,300,000
Owned investment securities	1,100,000,000		1,100,000,000
Total unrealized losses on securities	$ 41,900,000		$ 41,900,000
Number of securities, below investment grade | secuirty	1		1
Available-for-sale securities, below investment grade, fair value	$ 600,000		$ 600,000
Weighted average duration of MBS portfolio			5 years 7 months 5 days
Collateralized Mortgage Backed Securities
Gain (Loss) on Securities [Line Items]
OTTI on evaluation of securities			$ 0		$ 0

INVESTMENT SECURITIES - Schedul

INVESTMENT SECURITIES - Schedule of Amortized Cost and Estimated Fair Value of Available-for-Sale and Held-to-Maturity Investment Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Available-for-Sale Debt Securities
Amortized Cost	$ 1,036,905	$ 847,791
Gross Unrealized Gain	74	1,356
Gross Unrealized Loss	39,848	11,648
Fair Value	997,131	837,499
Held-to-Maturity Debt Securities
Amortized Cost	152,577	161,186
Fair Value	150,583	162,853
Equity Investments
Amortized Cost	17,218	643
Gross Unrealized Gain	17,865	0
Gross Unrealized Loss	0	20
Fair Value	35,083	623
CMO
Available-for-Sale Debt Securities
Amortized Cost	311,507	250,592
Gross Unrealized Gain	0	88
Gross Unrealized Loss	11,477	4,141
Fair Value	300,030	246,539
FNMA MBS
Available-for-Sale Debt Securities
Amortized Cost	571,686	479,218
Gross Unrealized Gain	0	941
Gross Unrealized Loss	22,948	6,172
Fair Value	548,738	473,987
FHLMC MBS
Available-for-Sale Debt Securities
Amortized Cost	116,532	88,681
Gross Unrealized Gain	2	118
Gross Unrealized Loss	4,112	924
Fair Value	112,422	87,875
GNMA MBS
Available-for-Sale Debt Securities
Amortized Cost	37,180	29,300
Gross Unrealized Gain	72	209
Gross Unrealized Loss	1,311	411
Fair Value	35,941	29,098
Other equity investments
Equity Investments
Amortized Cost	3,300	643
Gross Unrealized Gain	0	0
Gross Unrealized Loss	0	20
Fair Value	3,300	623
State and political subdivisions
Held-to-Maturity Debt Securities
Amortized Cost	152,577	161,186
Gross Unrealized Gain	55	1,758
Gross Unrealized Loss	2,049	91
Fair Value	150,583	162,853
Equity Investments
Available for sale securities transfers to held to maturity unrealized gains	1,200	$ 1,600
Visa | Visa Class B shares | Common Stock
Equity Investments
Amortized Cost	13,918
Gross Unrealized Gain	17,865
Gross Unrealized Loss	0
Fair Value	$ 31,783

INVESTMENT SECURITIES - Sched_2

INVESTMENT SECURITIES - Schedule of Maturities of Investment Securities Available-for-Sale and Held-to-Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Available for Sale Amortized Cost
Within one year	$ 0	$ 0
After one year but within five years	19,792	20,051
After five years but within ten years	170,009	179,812
After ten years	847,104	647,928
Amortized Cost	1,036,905	847,791
Available for Sale Fair Value
Within one year	0	0
After one year but within five years	19,160	19,825
After five years but within ten years	159,754	175,583
After ten years	818,217	642,091
Available-for-sale securities, fair value total	997,131	837,499
Held to Maturity, Amortized Cost
Within one year	1,027	322
After one year but within five years	6,636	5,895
After five years but within ten years	29,148	18,751
After ten years	115,766	136,218
Amortized Cost	152,577	161,186
Held to Maturity, Fair Value
Within one year	1,023	320
After one year but within five years	6,599	5,894
After five years but within ten years	28,902	18,873
After ten years	114,059	137,766
Held-to-maturity securities, fair value total	$ 150,583	$ 162,853

INVESTMENT SECURITIES - Sched_3

INVESTMENT SECURITIES - Schedule of Investment Securities' Gross Unrealized Losses and Fair Value by Investment Category (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Available-for-sale debt securities:
Available-for-sale debt securities, Less than 12 months, Fair Value	$ 517,055	$ 398,776
Available-for-sale debt securities, Less than 12 months, Unrealized Loss	12,648	3,624
Available-for-sale debt securities, 12 months or longer, Fair Value	472,361	239,678
Available-for-sale debt securities, 12 months or longer, Unrealized Loss	27,200	8,024
Available-for-sale debt securities, Total, Fair Value	989,416	638,454
Available-for-sale debt securities, Total, Unrealized Loss	39,848	11,648
Held-to-maturity debt securities:
Held-to-maturity, Less than 12 months, Fair Value	150,060	23,404
Held-to-maturity, Less than 12 months, Unrealized Loss	2,013	59
Held-to-maturity, 12 months or longer, Fair Value	523	5,625
Held-to-maturity, 12 months or longer, Unrealized Loss	36	32
Held-to-maturity, Total, Fair Value	150,583	29,029
Held-to-maturity, Total, Unrealized Loss	2,049	91
CMO
Available-for-sale debt securities:
Available-for-sale debt securities, Less than 12 months, Fair Value	138,346	146,726
Available-for-sale debt securities, Less than 12 months, Unrealized Loss	2,826	1,820
Available-for-sale debt securities, 12 months or longer, Fair Value	161,684	77,149
Available-for-sale debt securities, 12 months or longer, Unrealized Loss	8,651	2,321
Available-for-sale debt securities, Total, Fair Value	300,030	223,875
Available-for-sale debt securities, Total, Unrealized Loss	11,477	4,141
FNMA MBS
Available-for-sale debt securities:
Available-for-sale debt securities, Less than 12 months, Fair Value	303,994	204,921
Available-for-sale debt securities, Less than 12 months, Unrealized Loss	8,047	1,479
Available-for-sale debt securities, 12 months or longer, Fair Value	244,744	126,342
Available-for-sale debt securities, 12 months or longer, Unrealized Loss	14,901	4,693
Available-for-sale debt securities, Total, Fair Value	548,738	331,263
Available-for-sale debt securities, Total, Unrealized Loss	22,948	6,172
FHLMC MBS
Available-for-sale debt securities:
Available-for-sale debt securities, Less than 12 months, Fair Value	55,386	42,514
Available-for-sale debt securities, Less than 12 months, Unrealized Loss	1,271	269
Available-for-sale debt securities, 12 months or longer, Fair Value	52,514	21,405
Available-for-sale debt securities, 12 months or longer, Unrealized Loss	2,841	655
Available-for-sale debt securities, Total, Fair Value	107,900	63,919
Available-for-sale debt securities, Total, Unrealized Loss	4,112	924
GNMA MBS
Available-for-sale debt securities:
Available-for-sale debt securities, Less than 12 months, Fair Value	19,329	4,615
Available-for-sale debt securities, Less than 12 months, Unrealized Loss	504	56
Available-for-sale debt securities, 12 months or longer, Fair Value	13,419	14,782
Available-for-sale debt securities, 12 months or longer, Unrealized Loss	807	355
Available-for-sale debt securities, Total, Fair Value	32,748	19,397
Available-for-sale debt securities, Total, Unrealized Loss	1,311	411
Other equity investments
Other equity investments
Other investments, Less than 12 months, Fair Value		0
Other investments, Less than 12 months, Unrealized Loss		0
Other investments, 12 months or longer, Fair Value		624
Other investments, 12 months or longer, Unrealized Loss		20
Other investments, Total, Fair Value		624
Other investments, Total, Unrealized Loss		20
State and political subdivisions
Held-to-maturity debt securities:
Held-to-maturity, Less than 12 months, Fair Value	150,060	23,404
Held-to-maturity, Less than 12 months, Unrealized Loss	2,013	59
Held-to-maturity, 12 months or longer, Fair Value	523	5,625
Held-to-maturity, 12 months or longer, Unrealized Loss	36	32
Held-to-maturity, Total, Fair Value	150,583	29,029
Held-to-maturity, Total, Unrealized Loss	$ 2,049	$ 91

LOANS - Summary of Loan Portfol

LOANS - Summary of Loan Portfolio by Category (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 4,919,277		$ 4,805,094	$ 4,696,231
Deferred fees, net	7,911		7,991
Allowance for loan losses	41,812	$ 41,037	40,599	40,201	$ 40,005	$ 39,751
Net loans	4,886,136		4,776,318
Reverse mortgage, fair value	16,600		19,800	21,400
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	653,704		558,493	520,276
Allowance for loan losses	8,341	8,152	7,895	7,512	7,148	6,012
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,506,675		1,464,554
Owner-occupied commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,085,404		1,079,247	1,096,753
Allowance for loan losses	5,573	5,284	5,422	5,732	5,816	6,588
Commercial mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,133,281		1,187,705	1,157,074
Allowance for loan losses	6,384	6,951	5,891	5,919	7,335	8,915
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	333,487		281,608	293,317
Allowance for loan losses	3,472	$ 3,289	2,861	$ 3,917	$ 3,432	$ 2,838
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	223,308		253,301
Financing Receivable Portfolio Segment, Including Reverse Mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 4,935,859		$ 4,824,908

LOANS - Schedule of Outstanding

LOANS - Schedule of Outstanding Principal Balance and Carrying Amounts for Acquired Credit-Impaired Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Receivables [Abstract]
Outstanding principal balance	$ 21,534	$ 27,034
Carrying amount	17,264	21,295
Allowance for loan losses	$ 229	$ 358

LOANS - Summary of Changes in A

LOANS - Summary of Changes in Accretable Yield on Acquired Credit Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance at beginning of period	$ 2,925	$ 4,603	$ 3,035	$ 5,150
Accretion	(433)	(583)	(1,351)	(2,158)
Reclassification from nonaccretable difference	2	3	1,080	1,246
Additions/adjustments	(52)	(878)	(322)	(1,089)
Disposals	0	(341)	0	(345)
Balance at the end of the period	$ 2,442	$ 2,804	$ 2,442	$ 2,804

ALLOWANCE FOR LOAN LOSSES AND_3

ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY INFORMATION - Additional Information (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2018USD ($)SecurityLoanloan	Sep. 30, 2017USD ($)loan	Dec. 31, 2017USD ($)SecurityLoan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net charge-offs			$ 8,700,000	$ 6,500,000
Percentage of average loans annualized, charged-offs			0.24%	0.19%
Interest income on impaired loans	$ 600,000	$ 300,000	$ 1,300,000	$ 1,000,000
Troubled debt restructuring related reserves	$ 2,000,000		$ 2,000,000		$ 1,000,000
Usual sustained repayment performance period			6 months
TRD defaulted | loan			5	4
Subsequent default, loan amount			$ 500,000	$ 3,700,000
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of residential loans in the process of foreclosure | SecurityLoan			27		33
Total loans outstanding, residential loans			$ 2,100,000		$ 2,900,000
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of residential loans in the process of foreclosure | SecurityLoan			8		8
Total loans outstanding, residential loans			$ 5,600,000		$ 6,000,000
Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Period for impairment loans			90 days
Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Increase (decrease) in allowance for loan losses (less than)			$ (700,000)
Troubled debt restructurings charged off (less than)			$ 100,000	$ 0
Total Residential and Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impairment loans, charge off period			90 days

ALLOWANCE FOR LOAN LOSSES AND_4

ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY INFORMATION - Schedule of Allowance for Loan Losses and Loan Balances (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Allowance for loan losses
Beginning balance	$ 41,037	$ 40,005	$ 40,599	$ 39,751	$ 39,751
Charge-offs	(3,803)	(3,752)	(10,646)	(8,849)
Recoveries	862	1,052	1,995	2,398
Provision (credit)	3,834	2,823	9,940	6,280
Provision (credit) for acquired loans	(118)	73	(76)	621
Ending balance	41,812	40,201	41,812	40,201	40,599
Loans individually evaluated for impairment	5,164	2,407	5,164	2,407
Loans collectively evaluated for impairment	36,419	37,252	36,419	37,252
Acquired loans evaluated for impairment			229	542
Ending balance	41,812	40,201	41,812	40,201
Loans individually evaluated for impairment	51,879	48,511	51,879	48,511
Loans collectively evaluated for impairment	4,384,467	4,026,672	4,384,467	4,026,672
Acquired nonimpaired loans	465,438	596,466	465,438	596,466	565,500
Acquired impaired loans			17,493	24,582	21,654
Ending balance	4,919,277	4,696,231	4,919,277	4,696,231	4,805,094
Reverse mortgage, fair value	16,600	21,400	16,600	21,400	19,800
Performing TDRs			15,192	14,900	20,061
Owner-occupied commercial
Allowance for loan losses
Beginning balance	5,284	5,816	5,422	6,588	6,588
Charge-offs	0	(104)	(351)	(296)
Recoveries	16	12	28	120
Provision (credit)	273	(96)	419	(802)
Provision (credit) for acquired loans	0	104	55	122
Ending balance	5,573	5,732	5,573	5,732	5,422
Loans individually evaluated for impairment	9	0	9	0
Loans collectively evaluated for impairment	5,546	5,699	5,546	5,699
Acquired loans evaluated for impairment			18	33
Ending balance	5,573	5,732	5,573	5,732
Loans individually evaluated for impairment	2,829	3,346	2,829	3,346
Loans collectively evaluated for impairment	958,356	941,296	958,356	941,296
Acquired nonimpaired loans	119,403	144,710	119,403	144,710
Acquired impaired loans			4,816	7,401	5,803
Ending balance	1,085,404	1,096,753	1,085,404	1,096,753	1,079,247
Commercial mortgages
Allowance for loan losses
Beginning balance	6,951	7,335	5,891	8,915	8,915
Charge-offs	0	(1,196)	(48)	(1,702)
Recoveries	52	16	189	69
Provision (credit)	(598)	(231)	356	(1,602)
Provision (credit) for acquired loans	(21)	(5)	(4)	239
Ending balance	6,384	5,919	6,384	5,919	5,891
Loans individually evaluated for impairment	0	131	0	131
Loans collectively evaluated for impairment	6,300	5,638	6,300	5,638
Acquired loans evaluated for impairment			84	150
Ending balance	6,384	5,919	6,384	5,919
Loans individually evaluated for impairment	6,502	9,012	6,502	9,012
Loans collectively evaluated for impairment	961,345	943,699	961,345	943,699
Acquired nonimpaired loans	156,483	194,394	156,483	194,394
Acquired impaired loans			8,951	9,969	9,724
Ending balance	1,133,281	1,157,074	1,133,281	1,157,074	1,187,705
Construction
Allowance for loan losses
Beginning balance	3,289	3,432	2,861	2,838	2,838
Charge-offs	(1,475)	(215)	(1,475)	(346)
Recoveries	1	301	3	305
Provision (credit)	1,657	427	2,106	1,056
Provision (credit) for acquired loans	0	(28)	(23)	64
Ending balance	3,472	3,917	3,472	3,917	2,861
Loans individually evaluated for impairment	444	0	444	0
Loans collectively evaluated for impairment	3,019	3,881	3,019	3,881
Acquired loans evaluated for impairment			9	36
Ending balance	3,472	3,917	3,472	3,917
Loans individually evaluated for impairment	2,903	1,839	2,903	1,839
Loans collectively evaluated for impairment	322,822	271,447	322,822	271,447
Acquired nonimpaired loans	7,025	19,085	7,025	19,085
Acquired impaired loans			737	946	940
Ending balance	333,487	293,317	333,487	293,317	281,608
Commercial
Allowance for loan losses
Beginning balance	15,842	14,224	16,732	13,339	13,339
Charge-offs	(1,761)	(1,603)	(6,861)	(3,787)
Recoveries	621	417	1,060	820
Provision (credit)	1,947	2,128	5,730	4,597
Provision (credit) for acquired loans	(82)	(7)	(94)	190
Ending balance	16,567	15,159	16,567	15,159	16,732
Loans individually evaluated for impairment	3,970	1,220	3,970	1,220
Loans collectively evaluated for impairment	12,517	13,646	12,517	13,646
Acquired loans evaluated for impairment			80	293
Ending balance	16,567	15,159	16,567	15,159
Loans individually evaluated for impairment	19,910	12,845	19,910	12,845
Loans collectively evaluated for impairment	1,387,143	1,249,027	1,387,143	1,249,027
Acquired nonimpaired loans	97,552	120,987	97,552	120,987
Acquired impaired loans			2,070	5,235	4,156
Ending balance	1,506,675	1,388,094	1,506,675	1,388,094	1,464,554
Residential
Allowance for loan losses
Beginning balance	1,519	2,050	1,798	2,059	2,059
Charge-offs	0	(59)	(54)	(112)
Recoveries	28	11	117	141
Provision (credit)	(71)	(49)	(382)	(146)
Provision (credit) for acquired loans	(1)	9	(4)	20
Ending balance	1,475	1,962	1,475	1,962	1,798
Loans individually evaluated for impairment	570	858	570	858
Loans collectively evaluated for impairment	870	1,078	870	1,078
Acquired loans evaluated for impairment			35	26
Ending balance	1,475	1,962	1,475	1,962
Loans individually evaluated for impairment	11,479	14,060	11,479	14,060
Loans collectively evaluated for impairment	134,074	148,715	134,074	148,715
Acquired nonimpaired loans	60,407	77,154	60,407	77,154
Acquired impaired loans			766	788	784
Ending balance	206,726	240,717	206,726	240,717	233,487
Consumer
Allowance for loan losses
Beginning balance	8,152	7,148	7,895	6,012	6,012
Charge-offs	(567)	(575)	(1,857)	(2,606)
Recoveries	144	295	598	943
Provision (credit)	626	644	1,711	3,177
Provision (credit) for acquired loans	(14)	0	(6)	(14)
Ending balance	8,341	7,512	8,341	7,512	7,895
Loans individually evaluated for impairment	171	198	171	198
Loans collectively evaluated for impairment	8,167	7,310	8,167	7,310
Acquired loans evaluated for impairment			3	4
Ending balance	8,341	7,512	8,341	7,512
Loans individually evaluated for impairment	8,256	7,409	8,256	7,409
Loans collectively evaluated for impairment	620,727	472,488	620,727	472,488
Acquired nonimpaired loans	24,568	40,136	24,568	40,136
Acquired impaired loans			153	243	247
Ending balance	$ 653,704	$ 520,276	$ 653,704	$ 520,276	$ 558,493

ALLOWANCE FOR LOAN LOSSES AND_5

ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY INFORMATION - Summary of Nonaccrual and Past Due Loans (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	$ 8,925		$ 8,592
Accruing Current Balances	4,856,171		4,738,412
Acquired Impaired Loans	17,493	$ 24,582	21,654
Nonaccrual Loans	36,688		36,436
Total Loans	$ 4,919,277	4,696,231	$ 4,805,094
30-59 Days Past Due and Still Accruing, % of Total Loans	0.13%		0.14%
60-89 Days Past Due and Still Accruing, % of Total Loans	0.05%		0.03%
Greater Than 90 Days Past Due and Still Accruing, % of Total Loans	0.00%		0.01%
Total Past Due And Still Accruing, % of Total Loans	0.18%		0.18%
Accruing Current Balances, % of Total Loans	98.72%		98.61%
Acquired Impaired Loans, % of Total Loans	0.36%		0.45%
Nonaccrual Loans, % of Total Loans	0.75%		0.76%
% of Total Loans	100.00%		100.00%
Reverse mortgage, fair value	$ 16,600	21,400	$ 19,800
Acquired nonimpaired loans	465,438	596,466	565,500
Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	1,470		1,050
Accruing Current Balances	1,484,007		1,440,291
Acquired Impaired Loans	2,070	5,235	4,156
Nonaccrual Loans	19,128		19,057
Total Loans	1,506,675	1,388,094	1,464,554
Acquired nonimpaired loans	97,552	120,987
Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	3,239		3,145
Accruing Current Balances	199,456		225,434
Acquired Impaired Loans	766	788	784
Nonaccrual Loans	3,265		4,124
Total Loans	206,726	240,717	233,487
Acquired nonimpaired loans	60,407	77,154
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	971		1,685
Accruing Current Balances	650,226		554,634
Acquired Impaired Loans	153	243	247
Nonaccrual Loans	2,354		1,927
Total Loans	653,704	520,276	558,493
Acquired nonimpaired loans	24,568	40,136
30–59 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	6,472		6,614
30–59 Days Past Due and Still Accruing | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	1,324		1,050
30–59 Days Past Due and Still Accruing | Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	2,336		2,058
30–59 Days Past Due and Still Accruing | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	612		1,117
60–89 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	2,242		1,517
60–89 Days Past Due and Still Accruing | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	144		0
60–89 Days Past Due and Still Accruing | Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	879		731
60–89 Days Past Due and Still Accruing | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	174		463
Greater Than 90 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	211		461
Greater Than 90 Days Past Due and Still Accruing | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	2		0
Greater Than 90 Days Past Due and Still Accruing | Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	24		356
Greater Than 90 Days Past Due and Still Accruing | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	185		105
Owner-occupied commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	2,308		2,302
Accruing Current Balances	1,075,451		1,067,488
Acquired Impaired Loans	4,816	7,401	5,803
Nonaccrual Loans	2,829		3,654
Total Loans	1,085,404	1,096,753	1,079,247
Acquired nonimpaired loans	119,403	144,710
Owner-occupied commercial | 30–59 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	1,526		2,069
Owner-occupied commercial | 60–89 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	782		233
Owner-occupied commercial | Greater Than 90 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	0		0
Commercial mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	937		410
Accruing Current Balances	1,117,184		1,171,701
Acquired Impaired Loans	8,951	9,969	9,724
Nonaccrual Loans	6,209		5,870
Total Loans	1,133,281	1,157,074	1,187,705
Acquired nonimpaired loans	156,483	194,394
Commercial mortgages | 30–59 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	674		320
Commercial mortgages | 60–89 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	263		90
Commercial mortgages | Greater Than 90 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	0		0
Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	0		0
Accruing Current Balances	329,847		278,864
Acquired Impaired Loans	737	946	940
Nonaccrual Loans	2,903		1,804
Total Loans	333,487	293,317	281,608
Acquired nonimpaired loans	7,025	$ 19,085
Construction | 30–59 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	0		0
Construction | 60–89 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	0		0
Construction | Greater Than 90 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	$ 0		$ 0

ALLOWANCE FOR LOAN LOSSES AND_6

ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY INFORMATION - Analysis of Impaired Loans (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ending Loan Balances	$ 55,938	$ 62,106
Loans with No Related Reserve	32,663	32,172
Loans with Related Reserve	23,275	29,934
Related Reserve	5,393	5,017
Contractual Principal Balances	73,486	78,982
Average Loan Balances	58,237	60,743
Acquired impaired loans	4,100	5,800
Contractual principal balance	4,500	6,800
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ending Loan Balances	20,211	20,842
Loans with No Related Reserve	8,713	3,422
Loans with Related Reserve	11,498	17,420
Related Reserve	4,050	3,861
Contractual Principal Balances	23,609	23,815
Average Loan Balances	18,479	15,072
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ending Loan Balances	11,690	14,181
Loans with No Related Reserve	7,509	8,282
Loans with Related Reserve	4,181	5,899
Related Reserve	605	796
Contractual Principal Balances	14,109	17,015
Average Loan Balances	13,249	14,533
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ending Loan Balances	8,289	7,819
Loans with No Related Reserve	7,264	6,304
Loans with Related Reserve	1,025	1,515
Related Reserve	174	203
Contractual Principal Balances	9,015	8,977
Average Loan Balances	7,862	8,158
Owner-occupied commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ending Loan Balances	4,502	5,374
Loans with No Related Reserve	2,553	3,654
Loans with Related Reserve	1,949	1,720
Related Reserve	27	12
Contractual Principal Balances	4,766	5,717
Average Loan Balances	5,099	5,827
Commercial mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ending Loan Balances	8,114	7,598
Loans with No Related Reserve	6,502	4,487
Loans with Related Reserve	1,612	3,111
Related Reserve	84	112
Contractual Principal Balances	16,816	16,658
Average Loan Balances	8,740	12,630
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ending Loan Balances	3,132	6,292
Loans with No Related Reserve	122	6,023
Loans with Related Reserve	3,010	269
Related Reserve	453	33
Contractual Principal Balances	5,171	6,800
Average Loan Balances	$ 4,808	$ 4,523

ALLOWANCE FOR LOAN LOSSES AND_7

ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY INFORMATION - Schedule of Commercial Credit Exposure (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial Loans	100.00%	100.00%
Acquired nonimpaired loans	$ 465,438	$ 565,500	$ 596,466
Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	1,506,675	1,464,554
Acquired nonimpaired loans	97,552		120,987
Special mention | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	21,315	22,789
Accrual | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	17,247	34,332
Nonaccrual | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	15,158	15,370
Doubtful | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	$ 3,970	$ 3,687
Total Special Mention and Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial Loans	3.00%	3.00%
Total Special Mention and Substandard | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	$ 57,690	$ 76,178
Acquired impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial Loans	1.00%	1.00%
Acquired impaired | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	$ 2,070	$ 4,156
Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial Loans	96.00%	96.00%
Pass | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	$ 1,446,915	$ 1,384,220
Owner-occupied commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	1,085,404	1,079,247
Acquired nonimpaired loans	119,403		144,710
Owner-occupied commercial | Special mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	32,123	16,783
Owner-occupied commercial | Accrual
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	24,662	19,386
Owner-occupied commercial | Nonaccrual
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	2,820	3,654
Owner-occupied commercial | Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	9	0
Owner-occupied commercial | Total Special Mention and Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	59,614	39,823
Owner-occupied commercial | Acquired impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	4,816	5,803
Owner-occupied commercial | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	1,020,974	1,033,621
Commercial mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	1,133,281	1,187,705
Acquired nonimpaired loans	156,483		194,394
Commercial mortgages | Special mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	10,806	0
Commercial mortgages | Accrual
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	1,546	1,967
Commercial mortgages | Nonaccrual
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	6,209	5,852
Commercial mortgages | Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	0	18
Commercial mortgages | Total Special Mention and Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	18,561	7,837
Commercial mortgages | Acquired impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	8,951	9,724
Commercial mortgages | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	1,105,769	1,170,144
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	333,487	281,608
Acquired nonimpaired loans	7,025		$ 19,085
Construction | Special mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	0	0
Construction | Accrual
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	169	4,965
Construction | Nonaccrual
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	2,460	1,804
Construction | Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	444	0
Construction | Total Special Mention and Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	3,073	6,769
Construction | Acquired impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	737	940
Construction | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	329,677	273,899
Total Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	4,058,847	4,013,114
Acquired nonimpaired loans	380,500	457,300
Total Commercial | Special mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	64,244	39,572
Total Commercial | Accrual
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	43,624	60,650
Total Commercial | Nonaccrual
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	26,647	26,680
Total Commercial | Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	4,423	3,705
Total Commercial | Total Special Mention and Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	138,938	130,607
Total Commercial | Acquired impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	16,574	20,623
Total Commercial | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	$ 3,903,335	$ 3,861,884

ALLOWANCE FOR LOAN LOSSES AND_8

ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY INFORMATION - Schedule of Residential and Consumer Credit Exposure (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 4,919,277	$ 4,805,094	$ 4,696,231
Total	100.00%	100.00%
Accrued troubled debt restructured loans	$ 14,100	$ 15,300
Reverse mortgage, fair value	16,600	19,800	21,400
Acquired nonimpaired loans	465,438	565,500	596,466
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	206,726	233,487	240,717
Acquired nonimpaired loans	60,407		77,154
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	653,704	558,493	520,276
Acquired nonimpaired loans	24,568		$ 40,136
Nonperforming | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	11,479	13,778
Nonperforming | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	8,256	7,588
Performing | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	194,481	218,925
Performing | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 645,295	$ 550,658
Acquired impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1.00%	1.00%
Acquired impaired | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 766	$ 784
Acquired impaired | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	153	247
Total Residential and Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 860,430	$ 791,980
Total	100.00%	100.00%
Acquired nonimpaired loans	$ 85,000	$ 108,200
Total Residential and Consumer | Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 19,735	$ 21,366
Total	2.00%	3.00%
Total Residential and Consumer | Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 839,776	$ 769,583
Total	98.00%	97.00%
Total Residential and Consumer | Acquired impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 919	$ 1,031
Total	0.00%	0.00%

ALLOWANCE FOR LOAN LOSSES AND_9

ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY INFORMATION - Schedule of Troubled Debt Restructurings (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Receivables [Abstract]
Performing TDRs	$ 15,192	$ 14,900	$ 20,061
Nonperforming TDRs	14,604		9,627
Total TDRs	$ 29,796		$ 29,688

ALLOWANCE FOR LOAN LOSSES AN_10

ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY INFORMATION - Schedule of Types of TDR (Details) - loan	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	29	29
Owner-occupied commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	1
Commercial mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	3	0
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	6	2
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	1	3
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	4	5
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	15	18
Contractual payment reduction and term extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	20	4
Contractual payment reduction and term extension | Owner-occupied commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0
Contractual payment reduction and term extension | Commercial mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	2	0
Contractual payment reduction and term extension | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	6	1
Contractual payment reduction and term extension | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0
Contractual payment reduction and term extension | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	4	2
Contractual payment reduction and term extension | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	8	1
Maturity Date Extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	3	4
Maturity Date Extension | Owner-occupied commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	1
Maturity Date Extension | Commercial mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	1	0
Maturity Date Extension | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	1
Maturity Date Extension | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	1	2
Maturity Date Extension | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0
Maturity Date Extension | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	1	0
Discharged in bankruptcy
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	4	14
Discharged in bankruptcy | Owner-occupied commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0
Discharged in bankruptcy | Commercial mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0
Discharged in bankruptcy | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0
Discharged in bankruptcy | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0
Discharged in bankruptcy | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	3
Discharged in bankruptcy | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	4	11
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	2	7
Other | Owner-occupied commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0
Other | Commercial mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0
Other | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0
Other | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	1
Other | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0
Other | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	2	6

ALLOWANCE FOR LOAN LOSSES AN_11

ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY INFORMATION - Schedule of Loans Identified as Troubled Debt Restructurings During Periods Indicated (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Financing Receivable, Modifications [Line Items]
Total loans identified during the period	$ 601	$ 1,667	$ 9,917	$ 8,855
Commercial
Financing Receivable, Modifications [Line Items]
Total loans identified during the period	320	0	5,102	781
Commercial mortgages
Financing Receivable, Modifications [Line Items]
Total loans identified during the period	168	0	2,190	0
Construction
Financing Receivable, Modifications [Line Items]
Total loans identified during the period	0	0	920	1,836
Residential
Financing Receivable, Modifications [Line Items]
Total loans identified during the period	0	1,058	469	1,300
Consumer
Financing Receivable, Modifications [Line Items]
Total loans identified during the period	113	609	1,236	1,867
Owner-occupied commercial
Financing Receivable, Modifications [Line Items]
Total loans identified during the period	$ 0	$ 0	$ 0	$ 3,071

DEPOSITS (Details)

DEPOSITS (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Noninterest-bearing:
Noninterest demand	$ 1,515,336	$ 1,420,760
Total noninterest-bearing	1,515,336	1,420,760
Interest-bearing:
Interest-bearing demand	1,091,546	1,071,512
Savings	535,344	549,744
Money market	1,581,684	1,347,146
Customer time deposits	712,859	629,071
Brokered deposits	287,147	229,371
Total interest-bearing	4,208,580	3,826,844
Total deposits	$ 5,723,916	$ 5,247,604

ASSOCIATE BENEFIT PLANS - Addit

ASSOCIATE BENEFIT PLANS - Additional Information (Details)	Mar. 31, 2014	Sep. 30, 2018
Postemployment Benefits [Abstract]
Requisite service period	10 years
Amortization of unrecognized gains losses exceed percentage		10.00%

ASSOCIATE BENEFIT PLANS - Sched

ASSOCIATE BENEFIT PLANS - Schedule of Net Periodic Benefit Cost Components of Postretirement Benefits (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Postretirement Health Coverage
Business Acquisition [Line Items]
Service cost	$ 15	$ 11	$ 45	$ 40
Interest cost	18	16	53	54
Prior service cost amortization	(19)	(19)	(57)	(57)
Net gain recognition	(11)	(18)	(34)	(52)
Net periodic benefit cost	3	(10)	7	(15)
Pension Plan | Alliance
Business Acquisition [Line Items]
Service cost	10	10	30	30
Interest cost	75	75	222	225
Expected return on plan assets	(138)	(135)	(410)	(405)
Prior service cost amortization	0	0	0	0
Net gain recognition	0	0	0	0
Net periodic benefit cost	$ (53)	$ (50)	$ (158)	$ (150)

INCOME TAXES (Details)

INCOME TAXES (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Income Tax Examination [Line Items]
Tax benefit for deferred tax temporary differences	$ 900,000
Unrecognized tax benefits	0		$ 0
Amortization method qualified affordable housing project investments, amortization	500,000	$ 400,000	1,400,000	$ 1,200,000
Tax benefits recorded as income tax expense			200,000
Carrying value of investment in affordable housing credits	12,300,000		12,300,000		$ 13,800,000
Tax Credit
Income Tax Examination [Line Items]
Affordable housing tax credits	$ 1,300,000		$ 1,300,000

FAIR VALUE DISCLOSURES OF FIN_3

FAIR VALUE DISCLOSURES OF FINANCIAL ASSETS AND LIABILITIES - Schedule of Financial Instruments Carried at Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 997,131	$ 837,499
Investment securities available for sale		838,869
Total assets measured at fair value on a nonrecurring basis		90,647
Fair Value, Measurements, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	998,108
Fair Value, Measurements, Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets measured at fair value on a nonrecurring basis	123,487
CMO
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	300,030	246,539
CMO | Fair Value, Measurements, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	300,030	246,539
FNMA MBS
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	548,738	473,987
FNMA MBS | Fair Value, Measurements, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	548,738	473,987
FHLMC MBS
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	112,422	87,875
FHLMC MBS | Fair Value, Measurements, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	112,422	87,875
GNMA MBS
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	35,941	29,098
GNMA MBS | Fair Value, Measurements, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	35,941	29,098
Other equity investments | Fair Value, Measurements, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale		623
Other equity investments | Fair Value, Measurements, Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets measured at fair value on a nonrecurring basis	35,083
Other Assets | Fair Value, Measurements, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	977	747
Other Liabilities | Fair Value, Measurements, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other liabilities	4,781	3,225
Other real estate owned | Fair Value, Measurements, Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets measured at fair value on a nonrecurring basis	2,004	2,503
Loans held for sale | Fair Value, Measurements, Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets measured at fair value on a nonrecurring basis	35,855	31,055
Impaired loans, net | Fair Value, Measurements, Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets measured at fair value on a nonrecurring basis	50,545	57,089
Quoted Prices in Active Markets for Identical Asset (Level 1)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale		623
Total assets measured at fair value on a nonrecurring basis		0
Quoted Prices in Active Markets for Identical Asset (Level 1) | Fair Value, Measurements, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	0
Quoted Prices in Active Markets for Identical Asset (Level 1) | Fair Value, Measurements, Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets measured at fair value on a nonrecurring basis	0
Quoted Prices in Active Markets for Identical Asset (Level 1) | CMO | Fair Value, Measurements, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	0	0
Quoted Prices in Active Markets for Identical Asset (Level 1) | FNMA MBS | Fair Value, Measurements, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	0	0
Quoted Prices in Active Markets for Identical Asset (Level 1) | FHLMC MBS | Fair Value, Measurements, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	0	0
Quoted Prices in Active Markets for Identical Asset (Level 1) | GNMA MBS | Fair Value, Measurements, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	0	0
Quoted Prices in Active Markets for Identical Asset (Level 1) | Other equity investments | Fair Value, Measurements, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale		623
Quoted Prices in Active Markets for Identical Asset (Level 1) | Other equity investments | Fair Value, Measurements, Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets measured at fair value on a nonrecurring basis	0
Quoted Prices in Active Markets for Identical Asset (Level 1) | Other Assets | Fair Value, Measurements, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	0	0
Quoted Prices in Active Markets for Identical Asset (Level 1) | Other Liabilities | Fair Value, Measurements, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other liabilities	0	0
Quoted Prices in Active Markets for Identical Asset (Level 1) | Other real estate owned | Fair Value, Measurements, Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets measured at fair value on a nonrecurring basis	0	0
Quoted Prices in Active Markets for Identical Asset (Level 1) | Loans held for sale | Fair Value, Measurements, Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets measured at fair value on a nonrecurring basis	0	0
Quoted Prices in Active Markets for Identical Asset (Level 1) | Impaired loans, net | Fair Value, Measurements, Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets measured at fair value on a nonrecurring basis	0	0
Significant Other Observable Inputs (Level 2)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale		838,246
Total assets measured at fair value on a nonrecurring basis		31,055
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	998,108
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets measured at fair value on a nonrecurring basis	35,855
Significant Other Observable Inputs (Level 2) | CMO | Fair Value, Measurements, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	300,030	246,539
Significant Other Observable Inputs (Level 2) | FNMA MBS | Fair Value, Measurements, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	548,738	473,987
Significant Other Observable Inputs (Level 2) | FHLMC MBS | Fair Value, Measurements, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	112,422	87,875
Significant Other Observable Inputs (Level 2) | GNMA MBS | Fair Value, Measurements, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	35,941	29,098
Significant Other Observable Inputs (Level 2) | Other equity investments | Fair Value, Measurements, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale		0
Significant Other Observable Inputs (Level 2) | Other equity investments | Fair Value, Measurements, Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets measured at fair value on a nonrecurring basis	0
Significant Other Observable Inputs (Level 2) | Other Assets | Fair Value, Measurements, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	977	747
Significant Other Observable Inputs (Level 2) | Other Liabilities | Fair Value, Measurements, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other liabilities	4,781	3,225
Significant Other Observable Inputs (Level 2) | Other real estate owned | Fair Value, Measurements, Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets measured at fair value on a nonrecurring basis	0	0
Significant Other Observable Inputs (Level 2) | Loans held for sale | Fair Value, Measurements, Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets measured at fair value on a nonrecurring basis	35,855	31,055
Significant Other Observable Inputs (Level 2) | Impaired loans, net | Fair Value, Measurements, Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets measured at fair value on a nonrecurring basis	0	0
Significant Unobservable Inputs (Level 3)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale		0
Total assets measured at fair value on a nonrecurring basis		59,592
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	0
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets measured at fair value on a nonrecurring basis	87,632
Significant Unobservable Inputs (Level 3) | CMO | Fair Value, Measurements, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	0	0
Significant Unobservable Inputs (Level 3) | FNMA MBS | Fair Value, Measurements, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	0	0
Significant Unobservable Inputs (Level 3) | FHLMC MBS | Fair Value, Measurements, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	0	0
Significant Unobservable Inputs (Level 3) | GNMA MBS | Fair Value, Measurements, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	0	0
Significant Unobservable Inputs (Level 3) | Other equity investments | Fair Value, Measurements, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale		0
Significant Unobservable Inputs (Level 3) | Other equity investments | Fair Value, Measurements, Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets measured at fair value on a nonrecurring basis	35,083
Significant Unobservable Inputs (Level 3) | Other Assets | Fair Value, Measurements, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	0	0
Significant Unobservable Inputs (Level 3) | Other Liabilities | Fair Value, Measurements, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other liabilities	0	0
Significant Unobservable Inputs (Level 3) | Other real estate owned | Fair Value, Measurements, Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets measured at fair value on a nonrecurring basis	2,004	2,503
Significant Unobservable Inputs (Level 3) | Loans held for sale | Fair Value, Measurements, Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets measured at fair value on a nonrecurring basis	0	0
Significant Unobservable Inputs (Level 3) | Impaired loans, net | Fair Value, Measurements, Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets measured at fair value on a nonrecurring basis	$ 50,545	$ 57,089

FAIR VALUE DISCLOSURES OF FIN_4

FAIR VALUE DISCLOSURES OF FINANCIAL ASSETS AND LIABILITIES - Additional Information (Details) - USD ($)	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	$ 997,131,000	$ 837,499,000	$ 997,131,000
Minimum discount rate on appraisals of collateral securing loan			10.00%
Maximum discount rate on appraisals of collateral securing loan			20.00%
Loan balances	55,938,000	62,106,000	$ 55,938,000
Related reserve	5,393,000	5,017,000	5,393,000
Commitments of lending operations	0	$ 0
Significant Other Observable Inputs (Level 2) | Federal Agency MBS
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	$ 997,100,000		997,100,000
Accounting Standards Update 2016-01
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities unrealized gain			$ 18,600,000

FAIR VALUE DISCLOSURES OF FIN_5

FAIR VALUE DISCLOSURES OF FINANCIAL ASSETS AND LIABILITIES - Book Value and Estimated Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financial assets:
Investment securities available for sale		$ 838,869
Investment securities held to maturity	$ 152,577	161,186
Other investments	35,083	17,971
Loans, held for sale	35,855	31,055
Loans, net	4,886,136	4,776,318
Stock in FHLB of Pittsburgh	16,540	31,284
Accrued interest receivable	21,331	19,405
Other assets	62,041	59,068
Financial liabilities:
Deposits	5,723,916	5,247,604
Accrued interest payable	7,119	1,037
Quoted Prices in Active Markets for Identical Asset (Level 1)
Financial assets:
Investment securities available for sale		623
Significant Other Observable Inputs (Level 2)
Financial assets:
Investment securities available for sale		838,246
Significant Unobservable Inputs (Level 3)
Financial assets:
Investment securities available for sale		0
Book Value | Quoted Prices in Active Markets for Identical Asset (Level 1)
Financial assets:
Cash and cash equivalents	711,372	723,866
Book Value | Fair Value Inputs Level 1 And Level 2
Financial assets:
Investment securities available for sale	997,131	837,499
Book Value | Significant Other Observable Inputs (Level 2)
Financial assets:
Investment securities held to maturity	152,577	161,186
Loans, held for sale	35,855	31,055
Stock in FHLB of Pittsburgh	16,540	31,284
Accrued interest receivable	21,331	19,405
Financial liabilities:
Deposits	5,723,916	5,247,604
Borrowed funds	545,089	937,806
Accrued interest payable	7,119	1,037
Other liabilities	4,781	3,188
Book Value | Fair Value Inputs Level 1 And Level 3
Financial assets:
Other investments		14,671
Book Value | Fair Value Inputs Level 2 And Level 3
Financial assets:
Loans, net	4,835,591	4,719,229
Book Value | Significant Unobservable Inputs (Level 3)
Financial assets:
Other investments	35,083
Impaired loans, net	50,545	57,089
Other assets	977	2,883
Financial liabilities:
Standby letters of credit	328	603
Fair Value | Quoted Prices in Active Markets for Identical Asset (Level 1)
Financial assets:
Cash and cash equivalents	711,372	723,866
Fair Value | Fair Value Inputs Level 1 And Level 2
Financial assets:
Investment securities available for sale	997,131	837,499
Fair Value | Significant Other Observable Inputs (Level 2)
Financial assets:
Investment securities held to maturity	150,583	162,853
Loans, held for sale	35,855	31,055
Stock in FHLB of Pittsburgh	16,540	31,284
Accrued interest receivable	21,331	19,405
Financial liabilities:
Deposits	5,685,435	4,848,588
Borrowed funds	538,395	937,605
Accrued interest payable	7,119	1,037
Other liabilities	4,781	3,188
Fair Value | Fair Value Inputs Level 1 And Level 3
Financial assets:
Other investments		45,326
Fair Value | Fair Value Inputs Level 2 And Level 3
Financial assets:
Loans, net	4,802,841	4,699,458
Fair Value | Significant Unobservable Inputs (Level 3)
Financial assets:
Other investments	35,083
Impaired loans, net	50,545	57,089
Other assets	977	2,883
Financial liabilities:
Standby letters of credit	$ 328	$ 603

DERIVATIVE FINANCIAL INSTRUME_3

DERIVATIVE FINANCIAL INSTRUMENTS - Fair Value of Derivative Instruments (Details) $ in Thousands	Sep. 30, 2018USD ($)instrument
Derivative [Line Items]
Notional	$ 199,330
Total derivatives	(3,804)
Designated as Hedging Instrument
Derivative [Line Items]
Notional	75,000
Derivatives not designated as hedging instruments
Derivative [Line Items]
Notional	124,330
Total derivatives	885
Other Liabilities | Designated as Hedging Instrument
Derivative [Line Items]
Derivative Liability	$ (4,689)
Interest rate products | Other Liabilities | Designated as Hedging Instrument
Derivative [Line Items]
Count | instrument	3
Notional	$ 75,000
Derivative Liability	(4,689)
Interest rate lock commitments with customers | Other Assets | Derivatives not designated as hedging instruments
Derivative [Line Items]
Notional	47,634
Derivative Asset	595
Interest rate lock commitments with customers | Other Liabilities | Derivatives not designated as hedging instruments
Derivative [Line Items]
Notional	16,064
Derivative Liability	(61)
Forward sale commitments | Other Assets | Derivatives not designated as hedging instruments
Derivative [Line Items]
Notional	44,840
Derivative Asset	382
Forward sale commitments | Other Liabilities | Derivatives not designated as hedging instruments
Derivative [Line Items]
Notional	15,792
Derivative Liability	$ (31)

DERIVATIVE FINANCIAL INSTRUME_4

DERIVATIVE FINANCIAL INSTRUMENTS - Additional Information (Details)	9 Months Ended
	Sep. 30, 2018USD ($)instrument
Derivative [Line Items]
Derivative hedge Ineffectiveness gain (loss)	$ 0
Interest rate cash flow hedge increase decrease interest expense to be reclassified during next 12 months net	1,100,000
Interest rate cash flow hedge gain (loss) reclassified to earnings, net	400,000
Notional	199,330,000
Termination value of derivatives	(3,804,000)
Collateral value against obligations	5,600,000
Designated as Hedging Instrument
Derivative [Line Items]
Notional	75,000,000
Accrued Liabilities
Derivative [Line Items]
Termination value of derivatives	$ 4,700,000
Other Liabilities | Interest rate products | Designated as Hedging Instrument
Derivative [Line Items]
Count | instrument	3
Notional	$ 75,000,000

DERIVATIVE FINANCIAL INSTRUME_5

DERIVATIVE FINANCIAL INSTRUMENTS - Effect of Derivative Instruments on the Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Derivative [Line Items]
Amount of (Loss) or Gain Recognized in OCI on Derivative (Effective Portion)	$ (109)	$ 42	$ (1,119)	$ 192
Interest income | Interest Rate Products
Derivative [Line Items]
Amount of (Loss) or Gain Recognized in OCI on Derivative (Effective Portion)	(109)	42	(1,119)	192
Derivatives not designated as hedging instruments
Derivative [Line Items]
Amount of Gain or (Loss) Recognized in Income	16	0	(612)	0
Derivatives not designated as hedging instruments | Mortgage banking activities, net | Interest rate lock commitments with customers
Derivative [Line Items]
Amount of Gain or (Loss) Recognized in Income	192	0	(104)	0
Derivatives not designated as hedging instruments | Mortgage banking activities, net | Forward sale commitments
Derivative [Line Items]
Amount of Gain or (Loss) Recognized in Income	$ (176)	$ 0	$ (508)	$ 0

SEGMENT INFORMATION - Additiona

SEGMENT INFORMATION - Additional Information (Details)	9 Months Ended
	Sep. 30, 2018Segment
Segment Reporting [Abstract]
Number of segments	3

SEGMENT INFORMATION - Segment R

SEGMENT INFORMATION - Segment Results (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Interest income	$ 75,415	$ 65,010	$ 215,179	$ 188,170
Noninterest income	41,901	32,441	124,355	92,209
Total revenue	117,316	97,451	339,534	280,379
Interest expense	12,318	8,881	33,379	24,624
Noninterest expenses	52,454	54,163	163,697	158,396
Provision for loan losses	3,716	2,896	9,864	6,901
Total expenses	68,488	65,940	206,940	189,921
Income before taxes	48,828	31,511	132,594	90,458
Income tax provision	9,893	10,942	27,569	30,382
Net income	38,935	20,569	105,025	60,076
Inter-Segment Eliminations
Segment Reporting Information [Line Items]
Interest income	7,022	4,772	18,588	13,515
Noninterest income	2,358	1,971	7,137	6,515
Total revenue	9,380	6,743	25,725	20,030
Interest expense	7,022	4,772	18,588	13,515
Noninterest expenses	2,358	1,971	7,137	6,515
Total expenses	9,380	6,743	25,725	20,030
Operating Segments
Segment Reporting Information [Line Items]
Total revenue	126,696	104,194	365,259	300,409
Total expenses	77,868	72,683	232,665	209,951
Income before taxes	48,828	31,511	132,594	90,458
WSFS Bank
Segment Reporting Information [Line Items]
Interest income	72,836	62,748	207,725	181,670
Noninterest income	18,524	12,102	57,175	34,318
Total revenue	91,360	74,850	264,900	215,988
Interest expense	11,461	8,542	31,563	23,744
Noninterest expenses	44,922	39,546	126,862	117,288
Provision for loan losses	3,776	3,065	9,721	6,097
Total expenses	60,159	51,153	168,146	147,129
WSFS Bank | Inter-Segment Eliminations
Segment Reporting Information [Line Items]
Interest income	4,002	2,537	10,535	6,780
Noninterest income	2,122	1,721	6,449	5,791
Total revenue	6,124	4,258	16,984	12,571
Interest expense	3,020	2,235	8,053	6,735
Noninterest expenses	236	250	688	724
Total expenses	3,256	2,485	8,741	7,459
WSFS Bank | Operating Segments
Segment Reporting Information [Line Items]
Total revenue	97,484	79,108	281,884	228,559
Total expenses	63,415	53,638	176,887	154,588
Income before taxes	34,069	25,470	104,997	73,971
Cash Connect
Segment Reporting Information [Line Items]
Interest income	0	0	0	0
Noninterest income	13,026	11,212	36,707	31,403
Total revenue	13,026	11,212	36,707	31,403
Interest expense	0	0	0	0
Noninterest expenses	8,133	7,048	23,357	19,774
Provision for loan losses	0	0	0	0
Total expenses	8,133	7,048	23,357	19,774
Cash Connect | Inter-Segment Eliminations
Segment Reporting Information [Line Items]
Interest income	0	0	0	0
Noninterest income	200	213	581	611
Total revenue	200	213	581	611
Interest expense	2,885	1,856	7,460	4,843
Noninterest expenses	627	556	1,936	1,944
Total expenses	3,512	2,412	9,396	6,787
Cash Connect | Operating Segments
Segment Reporting Information [Line Items]
Total revenue	13,226	11,425	37,288	32,014
Total expenses	11,645	9,460	32,753	26,561
Income before taxes	1,581	1,965	4,535	5,453
Wealth Management
Segment Reporting Information [Line Items]
Interest income	2,579	2,262	7,454	6,500
Noninterest income	10,351	9,127	30,473	26,488
Total revenue	12,930	11,389	37,927	32,988
Interest expense	857	339	1,816	880
Noninterest expenses	(601)	7,569	13,478	21,334
Provision for loan losses	(60)	(169)	143	804
Total expenses	196	7,739	15,437	23,018
Wealth Management | Inter-Segment Eliminations
Segment Reporting Information [Line Items]
Interest income	3,020	2,235	8,053	6,735
Noninterest income	36	37	107	113
Total revenue	3,056	2,272	8,160	6,848
Interest expense	1,117	681	3,075	1,937
Noninterest expenses	1,495	1,165	4,513	3,847
Total expenses	2,612	1,846	7,588	5,784
Wealth Management | Operating Segments
Segment Reporting Information [Line Items]
Total revenue	15,986	13,661	46,087	39,836
Total expenses	2,808	9,585	23,025	28,802
Income before taxes	$ 13,178	$ 4,076	$ 23,062	$ 11,034

SEGMENT INFORMATION - Details o

SEGMENT INFORMATION - Details of Segment Information - Statement of Financial Condition (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Cash and cash equivalents	$ 711,372	$ 723,866	$ 733,365	$ 821,923
Goodwill	166,007	166,007
Other segment assets	6,282,463	6,109,667
Total assets	7,159,842	6,999,540
Capital expenditures	4,908	8,994
WSFS Bank
Segment Reporting Information [Line Items]
Cash and cash equivalents	132,857	104,530
Goodwill	145,808	145,808
Other segment assets	6,053,095	5,882,910
Total assets	6,331,760	6,133,248
Capital expenditures	4,252	8,197
Cash Connect
Segment Reporting Information [Line Items]
Cash and cash equivalents	564,915	611,385
Goodwill	0	0
Other segment assets	8,098	6,078
Total assets	573,013	617,463
Capital expenditures	340	184
Wealth Management
Segment Reporting Information [Line Items]
Cash and cash equivalents	13,600	7,951
Goodwill	20,199	20,199
Other segment assets	221,270	220,679
Total assets	255,069	248,829
Capital expenditures	$ 316	$ 613

INDEMNIFICATIONS AND GUARANTE_2

INDEMNIFICATIONS AND GUARANTEES (Details)	9 Months Ended
	Sep. 30, 2018USD ($)loanTransactionFinancial_Institution	Dec. 31, 2017USD ($)loan
Guarantor Obligations [Line Items]
Number of unrelated financial institutions | Financial_Institution	5
Derivative transaction held for guarantee | loan	135	134
Notional	$ 199,330,000
Aggregate fair value of swaps to customers, asset	9,800,000
Aggregate fair value of swaps to customers, liability		$ 3,300,000
Reserves for swap guarantees	$ 0
Minimum
Guarantor Obligations [Line Items]
Notional amount maturity period	1 year
Maximum
Guarantor Obligations [Line Items]
Notional amount maturity period	10 years
Secondary Market Loan Sales
Guarantor Obligations [Line Items]
Provision for losses at the time of sale	$ 0
Number of loans repurchased | Transaction	0
Interest Rate Swap
Guarantor Obligations [Line Items]
Notional	$ 571,700,000	$ 561,800,000

CHANGE IN ACCUMULATED OTHER C_3

CHANGE IN ACCUMULATED OTHER COMPREHENSIVE LOSS - Components of Accumulated Other Comprehensive (Loss) Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance			$ 724,345	$ 687,336
Other comprehensive (loss) income before reclassifications	$ (6,144)	$ 1,331	(23,474)	5,994
Less: Amounts reclassified from accumulated other comprehensive (loss) income	(144)	(596)	(375)	(1,500)
Net current-period other comprehensive income (loss)	(6,288)	735	(23,849)	4,494
Ending Balance	798,822	740,861	798,822	740,861
Net change in investment securities available for sale
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(24,186)	(4,342)	(7,842)	(8,194)
Other comprehensive (loss) income before reclassifications	(6,042)	1,289	(22,370)	5,802
Less: Amounts reclassified from accumulated other comprehensive (loss) income	0	(475)	(16)	(1,136)
Net current-period other comprehensive income (loss)	(6,042)	814	(22,386)	4,666
Ending Balance	(30,228)	(3,528)	(30,228)	(3,528)
Net change in investment securities held to maturity
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	987	1,194	1,223	1,392
Other comprehensive (loss) income before reclassifications	0	0	0	0
Less: Amounts reclassified from accumulated other comprehensive (loss) income	(107)	(99)	(343)	(297)
Net current-period other comprehensive income (loss)	(107)	(99)	(343)	(297)
Ending Balance	880	1,095	880	1,095
Net change in defined benefit plan
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	894	912	865	957
Other comprehensive (loss) income before reclassifications	7	0	15	0
Less: Amounts reclassified from accumulated other comprehensive (loss) income	(37)	(22)	(16)	(67)
Net current-period other comprehensive income (loss)	(30)	(22)	(1)	(67)
Ending Balance	864	890	864	890
Net change in fair value of derivatives used for cash flow hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(3,408)	(1,622)	(2,398)	(1,772)
Other comprehensive (loss) income before reclassifications	(109)	42	(1,119)	192
Less: Amounts reclassified from accumulated other comprehensive (loss) income	0	0	0	0
Net current-period other comprehensive income (loss)	(109)	42	(1,119)	192
Ending Balance	(3,517)	(1,580)	(3,517)	(1,580)
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(25,713)	(3,858)	(8,152)	(7,617)
Ending Balance	$ (32,001)	$ (3,123)	$ (32,001)	$ (3,123)

CHANGE IN ACCUMULATED OTHER C_4

CHANGE IN ACCUMULATED OTHER COMPREHENSIVE LOSS - Components of Other Comprehensive (Loss) Income (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Realized gains on securities transactions		$ 0	$ 736	$ 21	$ 1,764
Income taxes		(9,893)	(10,942)	(27,569)	(30,382)
Income before taxes		48,828	31,511	132,594	90,458
Net income		38,935	20,569	105,025	60,076
Prior service cost (credit), tax adjustment	$ 100
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income		(144)	(596)	(375)	(1,500)
Reclassification out of Accumulated Other Comprehensive Income | Net change in defined benefit plan
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Prior service costs (credits)		(19)	(19)	21	(57)
Actuarial gains		(11)	(18)	(34)	(52)
Income taxes		(7)	15	(3)	42
Income before taxes		(30)	(37)	(13)	(109)
Net income		(37)	(22)	(16)	(67)
Reclassification out of Accumulated Other Comprehensive Income | Realized Gains on Securities Transactions | Net change in investment securities available for sale
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Realized gains on securities transactions		0	(736)	(21)	(1,764)
Income taxes		0	261	5	628
Net income		0	(475)	(16)	(1,136)
Reclassification out of Accumulated Other Comprehensive Income | Amortization of Net Unrealized Gains to Income During Period | Net change in investment securities available for sale
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of net unrealized gains to income during the period		(142)	(159)	(451)	(478)
Income taxes		35	60	108	181
Net income		$ (107)	$ (99)	$ (343)	$ (297)

RELATED PARTY TRANSACTIONS (Det

RELATED PARTY TRANSACTIONS (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Related Party Transaction [Line Items]
Total deposits from related parties	$ 4.6	$ 5.4
Loans
Related Party Transaction [Line Items]
Related party loan repayment	1.2	$ 1.2
New Loans And Credit Line Advance To Related Parties
Related Party Transaction [Line Items]
New loans and credit line advance to related parties	0.1
Repayments from related party debt (less than in current quarter)	$ 0.8

LEGAL AND OTHER PROCEEDINGS (De

LEGAL AND OTHER PROCEEDINGS (Details) - USD ($)	Feb. 27, 2018	Sep. 30, 2018	Sep. 30, 2018
Loss Contingencies [Line Items]
Additions to other significant pending legal or other proceedings			$ 0
Universitas Education, LLC | Settled Litigation
Loss Contingencies [Line Items]
Loss related to litigation settlement	$ 12,000,000
Proceeds from arbitration settlement and legal costs		$ 7,900,000