WSFS Financial (WSFS) 10-Q 8 Nov 17 2017 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Nov. 03, 2017
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2017
Document Fiscal Year Focus	2,017
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 Common Stock, Shares Outstanding (in shares)		31,389,882

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Interest income:
Interest and fees on loans	$ 58,504	$ 49,849	$ 169,258	$ 140,394
Interest on mortgage-backed securities	4,955	3,854	14,132	11,658
Interest and dividends on investment securities:
Taxable	14	80	137	242
Tax-exempt	1,125	1,134	3,387	3,418
Other interest income	412	420	1,256	1,174
Total interest income	65,010	55,337	188,170	156,886
Interest expense:
Interest on deposits	3,862	2,412	10,278	6,734
Interest on senior debt	1,807	2,119	6,049	4,236
Interest on Federal Home Loan Bank advances	2,402	1,225	6,057	3,397
Interest on federal funds purchased and securities sold under agreements to repurchase	273	113	709	457
Interest on trust preferred borrowings	500	415	1,418	1,183
Interest on other borrowings	37	32	113	88
Total interest expense	8,881	6,316	24,624	16,095
Net interest income	56,129	49,021	163,546	140,791
Provision for loan losses	2,896	5,828	6,901	7,862
Net interest income after provision for loan losses	53,233	43,193	156,645	132,929
Noninterest income:
Credit/debit card and ATM income	9,350	7,776	26,406	21,930
Investment management and fiduciary income	8,809	6,074	25,683	17,610
Deposit service charges	4,695	4,482	13,652	13,100
Mortgage banking activities, net	1,756	2,555	4,785	6,025
Securities gains, net	736	1,040	1,764	1,890
Loan fee income	483	542	1,483	1,499
Bank owned life insurance income	546	255	1,124	697
Other income	6,066	4,862	17,312	14,011
Total non interest income	32,441	27,586	92,209	76,762
Noninterest expense:
Salaries, benefits and other compensation	29,172	24,804	86,231	71,189
Occupancy expense	4,756	4,335	14,602	12,560
Equipment expense	2,922	2,653	9,544	7,642
Professional fees	2,248	1,554	6,552	6,891
Data processing and operations expenses	1,817	1,500	5,185	4,564
Marketing expense	712	712	2,268	2,177
Loan workout and OREO expenses	484	511	1,504	1,059
FDIC expenses	560	469	1,683	2,080
Early extinguishment of debt	695	0	695	0
Corporate development expense	153	5,885	857	7,003
Other operating expense	10,644	8,811	29,275	24,552
Total non interest expenses	54,163	51,234	158,396	139,717
Income before taxes	31,511	19,545	90,458	69,974
Income tax provision	10,942	6,823	30,382	24,004
Net income	$ 20,569	$ 12,722	$ 60,076	$ 45,970
Earnings per share:
Basic (in dollars per share)	$ 0.65	$ 0.42	$ 1.91	$ 1.54
Diluted (in dollars per share)	$ 0.64	$ 0.41	$ 1.86	$ 1.50

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net Income	$ 20,569	$ 12,722	$ 60,076	$ 45,970
Net change in unrealized gains on investment securities available for sale
Net unrealized gains (loss) arising during the period, net of tax expense (benefit) of $761, ($682), $3,498 and $8,668, respectively	1,289	(1,112)	5,802	14,143
Less: reclassification adjustment for net gains on sales realized in net income, net of tax expense of $261, $395, $628 and $718, respectively	(475)	(645)	(1,136)	(1,172)
Net change in unrealized gains (losses) on investment securities available-for-sale	814	(1,757)	4,666	12,971
Net change in securities held to maturity
Amortization of unrealized gain on securities reclassified to held-to-maturity, net of tax expense of $60, $60, $181 and $187, respectively	(99)	(102)	(297)	(305)
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 ($15), ($14), ($42) and $266, respectively	(22)	(20)	(67)	436
Net change in cash flow hedge
Net unrealized gain arising during the period, net of tax expense of $26, $38, $118 and $38, respectively	42	61	192	61
Total other comprehensive income (loss)	735	(1,818)	4,494	13,163
Total comprehensive income	$ 21,304	$ 10,904	$ 64,570	$ 59,133

Consolidated Statements of Com4

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net change in Unrealized (losses) gains, tax (benefit) expense	$ 761	$ (682)	$ 3,498	$ 8,668
Reclassification adjustment for gains, tax expense	261	395	628	718
Amortization of unrealized gain on securities reclassified to held-to-maturity, tax expense	60	60	181	187
Change in unfunded pension liability related to unrealized (loss) gain, prior service cost and transition obligation, tax (benefit) expense	(15)	(14)	(42)	266
Net change in cash flow hedge, tax expense	$ 26	$ 38	$ 118	$ 38

Consolidated Statements of Fina

Consolidated Statements of Financial Condition - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Assets:
Cash and due from banks	$ 117,343	$ 119,929
Cash in non-owned ATMs	612,443	698,454
Interest-bearing deposits in other banks including collateral of $3,380 at September 30, 2017 and December 31, 2016	3,579	3,540
Total cash and cash equivalents	733,365	821,923
Investment securities, available for sale (amortized cost of $816,114 at September 30, 2017 and $807,761 at December 31, 2016)	810,433	794,543
Investment securities, held to maturity-at cost (fair value of $163,397 at September 30, 2017 and $163,232 at December 31, 2016)	161,721	164,346
Loans, held for sale at fair value	19,313	54,782
Loans, net of allowance for loan losses of $40,201 at September 30, 2017 and $39,751 at December 31, 2016	4,670,216	4,444,375
Bank owned life insurance	102,727	101,425
Stock in Federal Home Loan Bank of Pittsburgh-at cost	33,277	38,248
Other real estate owned	3,924	3,591
Accrued interest receivable	17,789	17,027
Premises and equipment	48,345	48,871
Goodwill	166,007	167,539
Intangible assets	23,109	23,708
Other assets	85,118	84,892
Total assets	6,875,344	6,765,270
Deposits:
Noninterest-bearing demand	1,357,597	1,266,306
Interest-bearing demand	1,057,571	935,333
Money market	1,347,576	1,257,520
Savings	557,914	547,293
Time	305,347	332,624
Jumbo certificates of deposit – customer	251,782	260,560
Total customer deposits	4,877,787	4,599,636
Brokered deposits	173,932	138,802
Total deposits	5,051,719	4,738,438
Federal funds purchased and securities sold under agreements to repurchase	70,000	130,000
Federal Home Loan Bank advances	697,812	854,236
Trust preferred borrowings	67,011	67,011
Senior debt	98,116	152,050
Other borrowed funds	70,369	64,150
Accrued interest payable	3,882	1,151
Other liabilities	75,574	70,898
Total liabilities	6,134,483	6,077,934
Stockholders’ Equity:
Common stock $0.01 par value, 65,000,000 shares authorized; issued 56,217,643 at September 30, 2017 and 55,995,219 at December 31, 2016	562	580
Capital in excess of par value	334,221	329,457
Accumulated other comprehensive loss	(3,123)	(7,617)
Retained earnings	680,554	627,078
Treasury stock at cost, 24,807,145 shares at September 30, 2017 and 24,605,145 shares at December 31, 2016	(271,353)	(262,162)
Total stockholders’ equity	740,861	687,336
Total liabilities and stockholders’ equity	$ 6,875,344	$ 6,765,270

Consolidated Statements of Fin6

Consolidated Statements of Financial Condition (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Interest-bearing deposits in banks and other financial institutions, collateral	$ 3,380	$ 3,380
Available-for-sale securities, amortized cost basis	816,114	807,761
Held-to-maturity securities, fair value	163,397	163,232
Allowance for loan losses	$ 40,201	$ 39,751
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)	56,217,643	55,995,219
Treasury stock, shares (in shares)	24,807,145	24,605,145

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, 2015		$ 580,471	$ 560	$ 256,435	$ 696	$ 570,630	$ (247,850)
Beginning Balance (in shares) at Dec. 31, 2015			55,945,245
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		45,970				45,970
Other comprehensive income		13,163			13,163
Cash dividend		(5,437)				(5,437)
Issuance of common stock including proceeds from exercise of common stock options		1,890	$ 2	1,888
Issuance of common stock including proceeds from exercise of common stock options (in shares)			174,211
Stock-based compensation expense		2,066		2,066
Stock Issued During Period, Shares, Acquisitions			1,806,748
Acquisition of Penn Liberty		66,777	$ 18	66,759
Repurchase of common stock		(12,890)					(12,890)
Treasury share reclassification (in shares)	[1]		(2,022,627)
Ending Balance at Sep. 30, 2016		692,010	$ 580	327,148	13,859	611,163	(260,740)
Ending Balance (in shares) at Sep. 30, 2016			55,903,577
Beginning Balance at Jun. 30, 2016					15,677
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		12,722
Other comprehensive income		(1,818)
Ending Balance at Sep. 30, 2016		692,010	$ 580	327,148	13,859	611,163	(260,740)
Ending Balance (in shares) at Sep. 30, 2016			55,903,577
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		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)	$ (20)				(9,191)
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		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
[1]	The 2016 Consolidated Statement of Changes in Stockholder's Equity has been revised to reflect an adjustment between shares issued and treasury stock. This reclassification had no impact on shares outstanding, earnings per share or retained earnings.

Consolidated Statements of Cha8

Consolidated Statements of Changes in Stockholders Equity (Unaudited) (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash dividend (in dollars per share)	$ 0.21	$ 0.18
Common Stock
Repurchase of common stock (in shares)	204,000	409,371

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Operating activities:
Net Income	$ 60,076	$ 45,970
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	6,901	7,862
Depreciation of premises and equipment, net	6,454	5,587
Amortization of fees and discounts, net	15,002	13,921
Amortization of intangible assets	2,352	1,260
Gain on mortgage banking activities, net	(4,785)	(6,025)
Gain on sale of securities, net	(1,764)	(1,890)
Loss on sale of other real estate owned and valuation adjustments, net	187	230
Debt extinguishment cost	(695)	0
Deferred income tax expense	3,097	5,364
Increase in accrued interest receivable	(762)	(239)
(Increase) decrease in other assets	(7,451)	8,028
Origination of loans held for sale	(258,962)	(252,368)
Proceeds from sales of loans held for sale	284,797	230,864
Stock-based compensation expense	2,449	2,253
Increase in accrued interest payable	2,731	2,857
Increase (decrease) in other liabilities	962	(2,286)
Increase in value of bank owned life insurance	(899)	(2,311)
Increase in capitalized interest, net	(3,252)	(3,834)
Net cash provided by operating activities	107,828	55,243
Investing activities:
Purchases of investment securities held to maturity	0	(3,329)
Repayments, maturities and calls of investment securities held to maturity	1,175	2,840
Sale of investment securities available for sale	415,486	155,789
Purchases of investment securities available for sale	(593,878)	(254,993)
Repayments of investment securities available for sale	174,251	62,798
Proceeds of bank owned life insurance death benefit	371	0
Net increase in loans	(231,955)	(141,500)
Net cash for business combinations	0	51,788
Redemptions of stock of Federal Home Loan Bank of Pittsburgh	(128,159)	(57,308)
Redemptions of stock of Federal Home Loan Bank of Pittsburgh	133,130	51,117
Sales of other real estate owned	4,405	4,069
Investment in premises and equipment	(7,336)	(7,677)
Sales of premises and equipment	1,593	0
Net cash used for investing activities	(230,917)	(136,406)
Financing activities:
Net increase in demand and saving deposits	320,784	221,336
Decrease in time deposits	(36,055)	(57,383)
Increase (decrease) in brokered deposits	35,079	(12,091)
Decrease in loan payable	(359)	(366)
Receipts from FHLB advances	109,432,123	90,314,153
Repayments of FHLB advances	(109,588,547)	(90,166,500)
Receipts from federal funds purchased and securities sold under agreement to repurchase	17,610,000	21,676,620
Repayments of federal funds purchased and securities sold under agreement to repurchase	(17,670,000)	(21,723,820)
Dividends paid	(6,600)	(5,437)
Issuance of common stock and exercise of common stock options	2,317	1,918
Redemption of senior debt	(55,000)	0
Issuance of senior debt	0	97,849
Purchase of treasury stock	(9,211)	(12,890)
Net cash provided by financing activities	34,531	333,389
(Decrease) increase in cash and cash equivalents	(88,558)	252,226
Cash and cash equivalents at beginning of period	821,923	561,179
Cash and cash equivalents at end of period	733,365	813,405
Supplemental Disclosure of Cash Flow Information:
Interest	21,893	13,238
Income taxes	20,861	18,640
Non-cash information:
Loans transferred to other real estate owned	4,925	1,455
Loans transferred to portfolio from held-for-sale at fair value	12,782	6,337
Net change in accumulated other comprehensive income	4,494	13,163
Fair value of assets acquired, net of cash received	0	526,767
Fair value of liabilities assumed	0	583,517
Goodwill adjustments, net	$ (1,532)	$ (1,496)

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	BASIS OF PRESENTATION 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 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 our 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, other-than-temporary impairment (OTTI), and the income tax valuation allowance. Among other effects, changes to these estimates could result in future impairments of investment securities, goodwill and intangible assets and 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. 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, 2017 . 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, 2016 (the "2016 Annual Report on Form 10-K") that was filed with the SEC on March 1, 2017 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. The significant accounting policies used in preparation of our Consolidated Financial Statements are disclosed in our 2016 Annual Report on Form 10-K. There have not been any material changes in our significant accounting policies from those disclosed in our 2016 Annual Report on Form 10-K. Senior Debt On September 1, 2017, we redeemed $55.0 million in aggregate principal amount of our 6.25% senior notes due 2019 which were issued in 2012 (the 2012 senior notes). The 2012 senior notes were repaid using a portion of the proceeds from our 2016 issuance of senior unsecured fixed-to-floating rate notes (the 2016 senior notes) described below. We recorded noninterest expense of $0.7 million due to the write-off of unamortized debt issuance costs in connection with this redemption. On June 13, 2016, the Company issued $100.0 million of the 2016 senior notes. The 2016 senior notes mature on June 15, 2026 and have a fixed coupon rate of 4.50% from issuance until June 15, 2021 and a variable coupon rate of three month LIBOR plus 3.30% from June 15, 2021 until maturity. The 2016 senior notes may be redeemed beginning on June 15, 2021 at 100% of principal plus accrued and unpaid interest. The net proceeds from the issuance of the 2016 senior notes are being used for general corporate purposes. Acquisitions in 2016 On August 12, 2016, we completed the acquisition of Penn Liberty Financial Corp. (Penn Liberty), a community bank headquartered in Wayne, Pennsylvania in order to build our market share, deepen our presence in the southeastern Pennsylvania market, and enhance our customer base. The results of Penn Liberty’s operations are included in our Consolidated Financial Statements since the date of the acquisition. See Note 2 – Business Combinations for further information. During the third and fourth quarters of 2016, respectively, we acquired the assets of Powdermill Financial Solutions LLC, a multi-family office serving an affluent clientele in the local community and throughout the U.S., and West Capital Management, Inc., an independent, fee-only wealth management firm providing fully customized solutions tailored to the unique needs of institutions and high-net-worth individuals which operates under a multi-family office philosophy. These acquisitions align with our strategic plan to expand our wealth management offerings and to diversify our fee-income generating businesses. Correction of Prior Period Balances Consolidated Statements of Income: The Consolidated Statements of Income for the three and nine months ended September 30, 2016 have been revised to correct an immaterial error in Noninterest income - Other income and Noninterest expense - Other operating expense related to revenue earned for cash servicing fees. As a result, the Consolidated Statements of Income have been revised to reflect these changes, as follows: Three months ended September 30, 2016 Nine months ended September 30, 2016 (Dollars in thousands) As originally reported Adjustments As revised As originally reported Adjustments As revised Noninterest income - Other income $ 4,125 $ 737 $ 4,862 $ 12,017 $ 1,994 $ 14,011 Noninterest expense - Other operating expense 8,074 737 8,811 22,558 1,994 24,552 The above revisions had no effect on earnings per share or retained earnings. Periods not presented herein will be revised, as applicable, as they are included in future filings. RECENT ACCOUNTING PRONOUNCEMENTS Accounting Guidance Adopted in 2017 In March 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2016-05: Derivatives and Hedging (Topic 815): Effect of Derivative Contract Novations on Existing Hedge Accounting Relationships , which amends Accounting Standards Codification (ASC) Topic 815: Derivatives and Hedging. This new guidance clarifies that the novation of a derivative contract (i.e., a change in the counterparty) in a hedge accounting relationship does not, in and of itself, cause a hedge accounting relationship to be discontinued because it does not represent a termination of the original derivative instrument or a change in the critical terms of the hedge relationship. This new guidance is effective for annual reporting periods beginning after December 15, 2016 and may be adopted prospectively or retroactively. Early adoption is permitted, including adoption in an interim period. The Company adopted this accounting guidance during the quarter ended March 31, 2017 on a prospective basis with no impact to our Consolidated Financial Statements. In March 2016, the FASB issued ASU No. 2016-06, Contingent Put and Call Options in Debt Instruments, Derivatives and Hedging (Topic 815). ASU 2016-06 clarifies that determining whether the economic characteristics of a put or call are clearly and closely related to its debt host requires only an assessment of the four-step decision sequence outlined in FASB ASC paragraph 815-15-25-24. Additionally, entities are not required to separately assess whether the contingency itself is clearly and closely related. The standard is effective for public business entities in interim and annual periods in fiscal years beginning after December 15, 2016. Early adoption is permitted in any interim period for which the entity’s financial statements have not been issued, but would be retroactively applied to the beginning of the year that includes the interim period. The standard requires a modified retrospective transition approach, with a cumulative catch-up adjustment to opening retained earnings in the period of adoption. For instruments that are eligible for the fair value option, an entity has a one-time option to irrevocably elect to measure the debt instrument affected by the standard in its entirety at fair value with changes in fair value recognized in earnings. The Company adopted this accounting guidance during the quarter ended March 31, 2017 with no impact on our Consolidated Statements of Income or Consolidated Statements of Financial Condition. In March 2016, the FASB issued ASU No. 2016-07, Simplifying the Transition to the Equity Method of Accounting, Investments - Equity Method and Joint Ventures (Topic 323). ASU 2016-07 eliminates the requirement for an investor to retroactively apply the equity method when its increase in ownership interest (or degree of influence) in an investee triggers equity method accounting. The standard is effective for all entities in annual and interim periods in fiscal years beginning after December 15, 2016. Early adoption is permitted. The new guidance will be applied prospectively to changes in ownership (or influence) after the adoption date. The Company adopted this accounting guidance during the quarter ended March 31, 2017 on a prospective basis with no impact to our Consolidated Financial Statements. Accounting Guidance Pending Adoption at September 30, 2017 In May 2014, the FASB issued 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 will require an entity to recognize revenue when it transfers promised goods or services to customers using a five-step model that requires entities to 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 defers 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 of certain provisions in Topic 606. These ASC updates are effective for public business entities 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 standard permits the use of either the retrospective or retrospectively with the cumulative effect transition method. The Company will adopt the standard on January 1, 2018 using the retrospective with the cumulative effect transition method. For revenue streams determined to be within the scope of the standard, we have substantially completed our impact analysis, the results of which has shown an immaterial effect on our Consolidated Financial Statements. The Company is in the process of updating our accounting policies, processes and related internal controls to incorporate the changes from the standard. Topic 606 also includes expanded disclosure requirements which we are currently in the process of drafting. Although the impact of this adoption is expected to be immaterial on our financial statements, we do anticipate adding additional detail to our revenue disclosures. 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, minus 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. ASU 2016-01 is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is permitted. Entities may apply this guidance on a prospective or retrospective basis. The Company will adopt the standard on a prospective basis and does not expect the prospective application of this guidance to have a material impact on its Consolidated Financial Statements. 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 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 for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. The Company does not plan to early adopt this guidance and is currently in the process of identifying our complete lease population as defined by this guidance. The Company is also evaluating our internal systems, accounting policies, processes and related internal controls for potential impacts. Our preliminary review of this guidance suggests that adoption will result in additional assets and liabilities on our Consolidated Balance Sheet. The Company will adopt this guidance on January 1, 2019. 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 is in the early stages of evaluating the impact of this guidance on its Consolidated Financial Statements, internal systems, accounting policies, processes and related internal controls. Our preliminary review of this guidance 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 and significant estimates and judgments made by management at the time of adoption. The Company will adopt this guidance on January 1, 2020. 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 does not expect the application of this guidance to have any impact on its 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 does not expect the application of this guidance to have any impact on its Consolidated Financial Statements. 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 for public entities 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. The Company does not expect the application of this guidance to have a material impact on its Consolidated Financial Statements. 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, the new guidance clarifies that 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, the new guidance clarifies that each distinct nonfinancial asset and in-substance nonfinancial asset should be derecognized when the counterparty obtains control of it. The guidance is effective for public entities 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 is currently evaluating the impact of adopting ASU 2017-05 on its Consolidated Financial Statements. 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 for public entities in annual and interim periods in fiscal years beginning after December 15, 2017. Early adoption is permitted. 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 for public entities 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 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 for all entities 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 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 . The new guidance changes both the designation and measurement guidance for qualifying hedging relationships and 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. Additionally, the new guidance provides entities the ability to apply hedge accounting to additional hedging strategies. The guidance is effective for all entities in annual and interim periods beginning after December 15, 2018. Early adoption is permitted. The Company does not expect the application of this guidance to have a material impact on its Consolidated Financial Statements.

Business Combinations

Business Combinations	9 Months Ended
	Sep. 30, 2017
Business Combinations [Abstract]
Business Combinations	BUSINESS COMBINATIONS Penn Liberty Financial Corporation On August 12, 2016, we completed the acquisition of Penn Liberty. The acquisition of Penn Liberty was accounted for as a business combination using the acquisition method of accounting and, accordingly, assets acquired, liabilities assumed and consideration transferred were recorded at their estimated fair values as of the acquisition date. The fair values of assets acquired and liabilities assumed are now considered final. In connection with the acquisition of Penn Liberty, the consideration transferred and the fair value of identifiable assets acquired and liabilities assumed, including remeasurement adjustments subsequent to the date of acquisition, are summarized in the following table: (Dollars in thousands) Fair Value Consideration Transferred: Common shares issued (1,806,748) $ 68,352 Cash paid to Penn Liberty stock and option holders 40,549 Value of consideration 108,901 Assets acquired: Cash and due from banks 102,301 Investment securities 627 Loans 483,203 Premises and equipment 6,817 Deferred income taxes 6,542 Bank owned life insurance 8,666 Core deposit intangible 2,882 Other real estate owned 996 Other assets 12,085 Total assets 624,119 Liabilities assumed: Deposits 568,706 Other borrowings 10,000 Other liabilities 3,738 Total liabilities 582,444 Net assets acquired: 41,675 Goodwill resulting from acquisition of Penn Liberty $ 67,226 The following table details the change to goodwill recorded subsequent to acquisition: (Dollars in thousands) Fair Value Goodwill resulting from the acquisition of Penn Liberty reported as of December 31, 2016 $ 68,814 Effects of adjustments to: Deferred income taxes 880 Loans 279 Other assets (1,440 ) Other liabilities (1,307 ) Adjusted goodwill resulting from the acquisition of Penn Liberty as of September 30, 2017 $ 67,226 In many cases, the fair values of assets acquired and liabilities assumed were determined by estimating the cash flows expected to result from those assets and liabilities and discounting them at appropriate market rates. During the three months ended September 30, 2017, no adjustments were made to goodwill resulting from the acquisition of Penn Liberty.

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Earnings Per Share	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) 2017 2016 2017 2016 Numerator: Net income $ 20,569 $ 12,722 $ 60,076 $ 45,970 Denominator: Weighted average basic shares 31,420 30,520 31,424 29,914 Dilutive potential common shares 848 797 856 747 Weighted average fully diluted shares 32,268 31,317 32,280 30,661 Earnings per share: Basic $ 0.65 $ 0.42 $ 1.91 $ 1.54 Diluted $ 0.64 $ 0.41 $ 1.86 $ 1.50 Outstanding common stock equivalents having no dilutive effect — 1 5 10

Investment Securities

Investment Securities	9 Months Ended
	Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Investment Securities	INVESTMENT SECURITIES The following tables detail the amortized cost and the estimated fair value of our available-for-sale and held-to-maturity investment securities. None of our investment securities are classified as trading. (Dollars in thousands) Amortized Cost Gross Unrealized Gain Gross Unrealized Loss Fair Value Available-for-Sale Securities: September 30, 2017 CMO $ 269,267 $ 895 $ 2,354 $ 267,808 FNMA MBS 434,920 1,545 5,223 431,242 FHLMC MBS 85,564 277 779 85,062 GNMA MBS 25,723 289 315 25,697 Other investments 640 — 16 624 $ 816,114 $ 3,006 $ 8,687 $ 810,433 December 31, 2016 GSE $ 35,061 $ 9 $ 60 $ 35,010 CMO 264,607 566 3,957 261,216 FNMA MBS 414,218 950 9,404 405,764 FHLMC MBS 64,709 135 1,330 63,514 GNMA MBS 28,540 303 427 28,416 Other investments 626 — 3 623 $ 807,761 $ 1,963 $ 15,181 $ 794,543 (Dollars in thousands) Amortized Cost Gross Unrealized Gain Gross Unrealized Loss Fair Value Held-to-Maturity Securities (1) September 30, 2017 State and political subdivisions $ 161,721 $ 1,796 $ 120 $ 163,397 December 31, 2016 State and political subdivisions $ 164,346 $ 271 $ 1,385 $ 163,232 (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 $1.8 million and $2.2 million at September 30, 2017 and December 31, 2016 , respectively, related to securities transferred, which are offset in Accumulated Other Comprehensive Income, net of tax. The scheduled maturities of investment securities available for sale and held to maturity at September 30, 2017 and December 31, 2016 are presented in the table below: Available for Sale (1) Amortized Fair (Dollars in thousands) Cost Value September 30, 2017 Within one year $ — $ — After one year but within five years 4,007 4,002 After five years but within ten years 201,919 198,334 After ten years 609,548 607,473 $ 815,474 $ 809,809 December 31, 2016 Within one year $ 16,009 $ 16,017 After one year but within five years 19,052 18,992 After five years but within ten years 276,635 270,300 After ten years 495,439 488,611 $ 807,135 $ 793,920 Held to Maturity Amortized Fair (Dollars in thousands) Cost Value September 30, 2017 Within one year $ 328 $ 326 After one year but within five years 5,437 5,491 After five years but within ten years 15,672 15,838 After ten years 140,284 141,742 $ 161,721 $ 163,397 December 31, 2016 Within one year $ — $ — After one year but within five years 6,168 6,162 After five years but within ten years 8,882 8,870 After ten years 149,296 148,200 $ 164,346 $ 163,232 (1) Included in the investment portfolio, but not in the table above, is a mutual fund with an amortized cost and fair value of $0.6 million and $0.6 million as of September 30, 2017 and December 31, 2016 which has no stated maturity. Mortgage-backed securities (MBS) may have expected maturities that differ from their contractual maturities. These differences arise because borrowers have the right to call or prepay obligations with or without prepayment penalty. Investment securities with fair market values aggregating $737.3 million and $562.5 million were pledged as collateral for retail customer repurchase agreements, municipal deposits, and other obligations as of September 30, 2017 and December 31, 2016 , respectively. During the nine months ended September 30, 2017 , we sold $415.5 million of investment securities categorized as available for sale, resulting in realized gains of $1.9 million and realized losses of less than $0.1 million . During the nine months ended September 30, 2016 , we sold $155.8 million of investment securities categorized as available for sale, resulting in realized gains of $1.9 million and no realized losses. The cost basis of all investment securities sales is based on the specific identification method. As of September 30, 2017 and December 31, 2016 , our investment securities portfolio had remaining unamortized premiums of $14.9 million and $18.0 million , respectively, and unaccreted discounts of $1.1 million and $0.4 million , respectively. For 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 securities were in a continuous unrealized loss position at September 30, 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 securities: CMO $ 114,939 $ 1,188 $ 43,775 $ 1,166 $ 158,714 $ 2,354 FNMA MBS 188,153 2,299 74,801 2,924 262,954 5,223 FHLMC MBS 45,317 497 7,892 282 53,209 779 GNMA MBS 4,856 83 10,687 232 15,543 315 Other investments — — 624 16 624 16 Total temporarily impaired investments $ 353,265 $ 4,067 $ 137,779 $ 4,620 $ 491,044 $ 8,687 Less than 12 months 12 months or longer Total Fair Unrealized Fair Unrealized Fair Unrealized (Dollars in thousands) Value Loss Value Loss Value Loss Held-to-maturity securities: State and political subdivisions $ 13,571 $ 48 $ 6,700 $ 72 $ 20,271 $ 120 Total temporarily impaired investments $ 13,571 $ 48 $ 6,700 $ 72 $ 20,271 $ 120 For 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 securities were in a continuous unrealized loss position at December 31, 2016 . 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 securities: GSE $ 21,996 $ 60 $ — $ — $ 21,996 $ 60 CMO 160,572 3,867 4,654 90 165,226 3,957 FNMA MBS 50,878 1,330 — — 50,878 1,330 FHLMC MBS 300,403 9,404 — — 300,403 9,404 GNMA MBS 16,480 427 — — 16,480 427 Other investments 623 3 — — 623 3 Total temporarily impaired investments $ 550,952 $ 15,091 $ 4,654 $ 90 $ 555,606 $ 15,181 Less than 12 months 12 months or longer Total Fair Unrealized Fair Unrealized Fair Unrealized (Dollars in thousands) Value Loss Value Loss Value Loss Held-to-maturity securities: State and political subdivisions $ 112,642 $ 1,374 $ 695 $ 11 $ 113,337 $ 1,385 Total temporarily impaired investments $ 112,642 $ 1,374 $ 695 $ 11 $ 113,337 $ 1,385 At September 30, 2017 , we owned investment securities totaling $511.3 million for which the amortized cost basis exceeded fair value. Total unrealized losses on these securities were $8.8 million at September 30, 2017 . The temporary impairment is the result of changes in market interest rates subsequent to the purchase of the securities. 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 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 securities, with the exception of one having a fair value of $0.8 million at September 30, 2017 , were AA-rated or better at the time of purchase and remained investment grade at September 30, 2017 . All securities were evaluated for OTTI at September 30, 2017 and December 31, 2016 . The result of this evaluation showed no OTTI as of September 30, 2017 or December 31, 2016 . The estimated weighted average duration of MBS was 5.10 years at September 30, 2017 .

Loans

Loans	9 Months Ended
	Sep. 30, 2017
Receivables [Abstract]
Loans	LOANS The following table shows our loan portfolio by category: (Dollars in thousands) September 30, 2017 December 31, 2016 Commercial and industrial $ 1,388,094 $ 1,287,731 Owner-occupied commercial 1,096,753 1,078,162 Commercial mortgages 1,157,074 1,163,554 Construction 293,317 222,712 Residential (1) 262,147 289,611 Consumer 520,276 450,029 4,717,661 4,491,799 Less: Deferred fees, net 7,244 7,673 Allowance for loan losses 40,201 39,751 Net loans $ 4,670,216 $ 4,444,375 (1) Includes reverse mortgages, at fair value of $21.4 million at September 30, 2017 and $22.6 million at December 31, 2016 . 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, 2017 December 31, 2016 Outstanding principal balance $ 30,465 $ 41,574 Carrying amount 24,039 33,104 Allowance for loan losses 542 510 The following table presents the changes in accretable yield on the acquired credit impaired loans for the nine months ended September 30, 2017 : (Dollars in thousands) Nine months ended September 30, 2017 Balance at beginning of period $ 5,150 Accretion (2,158 ) Reclassification from nonaccretable difference 1,246 Additions/adjustments (1,089 ) Disposals (345 ) Balance at end of period $ 2,804

Allowance for Loan Losses and C

Allowance for Loan Losses and Credit Quality Information	9 Months Ended
	Sep. 30, 2017
Receivables [Abstract]
Allowance for Loan Losses and Credit Quality Information	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 within 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, if 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, 2017 and 2016 , net charge-offs totaled $6.5 million or 0.19% of average loans annualized, and $5.9 million , or 0.20% 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 27 quarters. During the nine months ended September 30, 2017 , we increased the look-back period to 27 quarters from the 24 quarters used at December 31, 2016 . This increase in the look-back period allows us to continue to anchor to the fourth quarter of 2010 to ensure that the core reserves calculated by the ALLL 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 27 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 core reserve estimates and current directional trends. Qualitative factors in our model can add to or subtract from core 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 9 quarters as of September 30, 2017 . Our residential mortgage and consumer LEP remained at 4 quarters as of September 30, 2017 . We evaluate LEP quarterly for reasonableness and complete a detailed historical analysis of our LEP annually for our commercial portfolio and review the current 4 quarter LEP for the retail portfolio to determine the continued reasonableness of this assumption. In prior periods, we had a component of the allowance for model estimation and complexity risk reserve. During the second quarter of 2016 as a result of continued refinement of the model and normal review of the factors, we removed the model estimation and complexity risk reserve from our calculation of the allowance for loan losses. 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, 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 evaluated for: 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. The following table provides the activity of the allowance for loan losses and loan balances for the three and nine months ended September 30, 2016 : (Dollars in thousands) Commercial Owner - occupied Commercial Commercial Mortgages Construction Residential (1) Consumer Complexity Risk (2) Total Three months ended September 30, 2016 Allowance for loan losses Beginning balance $ 11,402 $ 6,723 $ 8,135 $ 3,308 $ 2,352 $ 5,826 $ — $ 37,746 Charge-offs (3,737 ) (1,415 ) (1 ) (30 ) (43 ) (518 ) — (5,744 ) Recoveries 223 15 197 440 33 290 — 1,198 Provision (credit) 3,714 1,437 1,089 (824 ) (179 ) 401 — 5,638 Provision for acquired loans 117 185 (48 ) (76 ) 12 — — 190 Ending balance $ 11,719 $ 6,945 $ 9,372 $ 2,818 $ 2,175 $ 5,999 $ — $ 39,028 Nine months ended September 30, 2016 Allowance for loan losses Beginning balance $ 11,156 $ 6,670 $ 6,487 $ 3,521 $ 2,281 $ 5,964 $ 1,010 $ 37,089 Charge-offs (4,643 ) (1,556 ) (79 ) (59 ) (72 ) (1,967 ) — (8,376 ) Recoveries 557 66 310 486 112 922 — 2,453 Provision (credit) 4,551 1,564 2,650 (1,104 ) (177 ) 1,118 (1,010 ) 7,592 Provision for acquired loans 98 201 4 (26 ) 31 (38 ) — 270 Ending balance $ 11,719 $ 6,945 $ 9,372 $ 2,818 $ 2,175 $ 5,999 $ — $ 39,028 Period-end allowance allocated to: Loans individually evaluated for impairment $ 692 $ — $ 1,264 $ 215 $ 989 $ 201 $ — $ 3,361 Loans collectively evaluated for impairment 10,974 6,923 7,982 2,549 1,167 5,798 — 35,393 Acquired loans evaluated for impairment 53 22 126 54 19 — — 274 Ending balance $ 11,719 $ 6,945 $ 9,372 $ 2,818 $ 2,175 $ 5,999 $ — $ 39,028 Period-end loan balances: Loans individually evaluated for impairment (3) $ 4,198 $ 2,510 $ 7,165 $ 1,419 $ 13,957 $ 8,105 $ — $ 37,354 Loans collectively evaluated for impairment 1,077,258 869,051 904,328 182,338 150,318 368,428 — 3,551,721 Acquired nonimpaired loans 175,570 175,411 229,530 21,627 103,537 61,257 — 766,932 Acquired impaired loans 9,691 10,673 12,880 3,592 899 368 — 38,103 Ending balance (4) $ 1,266,717 $ 1,057,645 $ 1,153,903 $ 208,976 $ 268,711 $ 438,158 $ — $ 4,394,110 (1) Period-end loan balance excludes reverse mortgages, at fair value of $23.1 million . (2) Represents the portion of the allowance for loan losses established to capture factors not already included in other components in our allowance for loan losses methodology. (3) The difference between this amount and nonaccruing loans represents accruing troubled debt restructured loans of $14.2 million for the period ending September 30, 2016 . Accruing troubled debt restructured loans are considered impaired loans. (4) 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, 2017 (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 $ 673 $ 136 $ 685 $ 1,494 $ 1,368,660 $ 5,235 $ 12,705 $ 1,388,094 Owner-occupied commercial 998 — — 998 1,085,008 7,401 3,346 1,096,753 Commercial mortgages 1,320 — — 1,320 1,136,982 9,969 8,803 1,157,074 Construction 1,033 — — 1,033 289,499 946 1,839 293,317 Residential (1) 1,708 364 557 2,629 232,567 788 4,733 240,717 Consumer 593 771 96 1,460 516,463 243 2,110 520,276 Total (2) $ 6,325 $ 1,271 $ 1,338 $ 8,934 $ 4,629,179 $ 24,582 $ 33,536 $ 4,696,231 % of Total Loans 0.13 % 0.03 % 0.03 % 0.19 % 98.58 % 0.52 % 0.71 % 100 % (1) Residential accruing current balances excludes reverse mortgages at fair value of $21.4 million . (2) The balances above include a total of $596.5 million of acquired nonimpaired loans. December 31, 2016 (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 $ 1,507 $ 278 $ — $ 1,785 $ 1,277,748 $ 6,183 $ 2,015 $ 1,287,731 Owner-occupied commercial 116 540 — 656 1,063,306 12,122 2,078 1,078,162 Commercial mortgages 167 — — 167 1,143,180 10,386 9,821 1,163,554 Construction 132 — — 132 218,886 3,694 — 222,712 Residential (1) 3,176 638 153 3,967 257,234 860 4,967 267,028 Consumer 392 346 285 1,023 444,642 369 3,995 450,029 Total (2) $ 5,490 $ 1,802 $ 438 $ 7,730 $ 4,404,996 $ 33,614 $ 22,876 $ 4,469,216 % of Total Loans 0.12 % 0.04 % 0.01 % 0.17 % 98.57 % 0.75 % 0.51 % 100 % (1) Residential accruing current balances excludes reverse mortgages, at fair value of $22.6 million . (2) The balances above include a total of $724.1 million of acquired nonimpaired 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 FASB ASC 310, Receivables (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, 2017 and December 31, 2016 : September 30, 2017 (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 $ 14,814 $ 3,129 $ 11,685 $ 1,513 $ 16,967 $ 11,981 Owner-occupied commercial 4,669 3,346 1,323 33 4,984 5,583 Commercial mortgages 12,190 7,267 4,923 281 18,385 12,941 Construction 2,111 1,839 272 36 2,377 3,769 Residential 14,621 8,343 6,278 884 17,517 14,652 Consumer 7,447 5,914 1,533 202 9,283 8,216 Total (2) $ 55,852 $ 29,838 $ 26,014 $ 2,949 $ 69,513 $ 57,142 (1) Reflects loan balances at or written down to their remaining book balance. (2) The above includes acquired impaired loans totaling $7.3 million in the ending loan balance and $8.3 million in the contractual principal balance of the total acquired impaired loan portfolio of $24.6 million December 31, 2016 (Dollars in thousands) Ending Loan Balances Loans with No Related (1) Loans with Related Reserve Related Reserve Contractual Principal Balances Average Loan Balances Commercial $ 4,250 $ 1,395 $ 2,855 $ 505 $ 5,572 $ 5,053 Owner-occupied commercial 4,650 2,078 2,572 15 5,129 3,339 Commercial mortgages 15,065 4,348 10,717 1,433 20,716 7,323 Construction 3,662 — 3,662 303 3,972 2,376 Residential 14,256 7,122 7,134 934 17,298 15,083 Consumer 8,021 6,561 1,460 215 11,978 7,910 Total (2) $ 49,904 $ 21,504 $ 28,400 $ 3,405 $ 64,665 $ 41,084 (1) Reflects loan balances at or written down to their remaining book balance. (2) The above includes acquired impaired loans totaling $12.8 million in the ending loan balance and $15.0 million in the contractual principal balance of the total acquired impaired loan portfolio of $33.6 million . 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. Interest income of $0.5 million and $0.8 million was recognized on impaired loans during the three and nine months ended September 30, 2016 , respectively. As of September 30, 2017 , there were 32 residential loans and 3 commercial loans in the process of foreclosure. The total outstanding balance on the loans was $3.3 million and $0.2 million , respectively. As of December 31, 2016 , there were 29 residential loans and 7 commercial loans in the process of foreclosure. The total outstanding balance on the loans was $3.7 million and $3.6 million , respectively. Reserves on Acquired Nonimpaired Loans In accordance with FASB ASC 310, loans acquired by the Bank through its mergers with First National Bank of Wyoming, Alliance Bankcorp, Inc. (Alliance) and Penn Liberty are required to be 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 . Borrowers 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 that 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, 2017 (Dollars in thousands) Commercial Owner-occupied Commercial Commercial Mortgages Construction Total Commercial (1) Amount % Risk Rating: Special mention $ 12,474 $ 2,858 $ — $ 3,644 $ 18,976 Substandard: Accrual 52,237 25,083 64 754 78,138 Nonaccrual 11,485 3,346 8,672 1,839 25,342 Doubtful 1,220 — 131 — 1,351 Total Special Mention and Substandard 77,416 31,287 8,867 6,237 123,807 3 % Acquired impaired 5,235 7,401 9,969 946 23,551 1 % Pass 1,305,443 1,058,065 1,138,238 286,134 3,787,880 96 % Total $ 1,388,094 $ 1,096,753 $ 1,157,074 $ 293,317 $ 3,935,238 100 % (1) Table includes $479.2 million of acquired nonimpaired loans as of September 30, 2017 . December 31, 2016 (Dollars in thousands) Commercial Owner-occupied Commercial Commercial Mortgages Construction Total Commercial (1) Amount % Risk Rating: Special mention $ 17,630 $ 11,419 $ 34,198 $ — $ 63,247 Substandard: Accrual 45,067 19,871 239 2,193 67,370 Nonaccrual 1,693 2,078 8,574 — 12,345 Doubtful 322 — 1,247 — 1,569 Total Special Mention and Substandard 64,712 33,368 44,258 2,193 144,531 4 % Acquired impaired 6,183 12,122 10,386 3,694 32,385 1 % Pass 1,216,836 1,032,672 1,108,910 216,825 3,575,243 95 % Total $ 1,287,731 $ 1,078,162 $ 1,163,554 $ 222,712 $ 3,752,159 100 % (1) Table includes $573.5 million of acquired nonimpaired loans as of December 31, 2016 . Residential and Consumer Credit Exposure (Dollars in thousands) Residential (2) Consumer Total Residential and Consumer (3) September 30, December 31, September 30, December 31, September 30, 2017 December 31, 2016 2017 2016 2017 2016 Amount Percent Amount Percent Nonperforming (1) $ 14,060 $ 13,547 $ 7,409 $ 7,863 $ 21,469 3 % $ 21,410 3 % Acquired impaired loans 788 860 243 369 1,031 — % 1,229 — % Performing 225,869 252,621 512,624 441,797 738,493 97 % 694,418 97 % Total $ 240,717 $ 267,028 $ 520,276 $ 450,029 $ 760,993 100 % $ 717,057 100 % (1) Includes $14.6 million as of September 30, 2017 and $12.4 million as of December 31, 2016 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 $21.4 million and $22.6 million of reverse mortgages at fair value as of September 30, 2017 and December 31, 2016 , respectively. (3) Total includes $117.3 million and $150.5 million in acquired nonimpaired loans as of September 30, 2017 and December 31, 2016 , respectively. Troubled Debt Restructurings (TDRs) TDRs are recorded in accordance with FASB ASC 310-40, Troubled Debt Restructuring by Creditors (ASC 310-40) . The following table presents the balance of TDRs as of the indicated dates: (Dollars in thousands) September 30, 2017 December 31, 2016 Performing TDRs $ 14,905 $ 14,336 Nonperforming TDRs 11,114 8,451 Total TDRs $ 26,019 $ 22,787 Approximately $1.1 million and $1.3 million in related reserves have been established for these loans at September 30, 2017 and December 31, 2016 , respectively. The following table presents information regarding the types of loan modifications made for the nine months ended September 30, 2017 : Contractual payment reduction and term extension Maturity Date Extension Discharged in bankruptcy Other (1) Total Commercial 1 1 — — 2 Owner-occupied commercial — 1 — — 1 Construction — 2 — 1 3 Residential 2 — 3 — 5 Consumer 1 — 11 6 18 Total 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, 2017 and 2016 . Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 (Dollars in thousands) Pre Modification Post Modification Pre Modification Post Modification Pre Modification Post Modification Pre Modification Post Modification Commercial $ — $ — $ — $ — $ 781 $ 781 $ 1,125 $ 1,125 Owner-occupied commercial — — — — 3,071 3,071 — — Commercial mortgages — — — — — — — — Construction — — — — 1,836 1,836 — — Residential 1,058 1,058 797 797 1,300 1,300 1,523 1,523 Consumer 609 609 278 278 1,867 1,867 733 733 Total $ 1,667 $ 1,667 $ 1,075 $ 1,075 $ 8,855 $ 8,855 $ 3,381 $ 3,381 During the nine months ended September 30, 2017 , the TDRs set forth in the table above resulted in no increase in our allowance for loan losses, and also resulted in no additional charge-offs. For the same period of 2016 , the TDRs set forth in the table above increased our allowance for loan losses by $0.1 million and resulted in charge-offs of $0.1 million . At 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 .

Goodwill and Intangibles

Goodwill and Intangibles	9 Months Ended
	Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangibles	GOODWILL AND INTANGIBLES In accordance with FASB ASC 805, Business Combinations (ASC 805) and FASB ASC 350, Intangibles-Goodwill and Other (ASC 350), all assets and liabilities acquired in purchase acquisitions, including goodwill, indefinite-lived intangibles and other intangibles are recorded at fair value. During the nine months ended September 30, 2017 , we determined there were no events or other indicators of impairment as it relates to goodwill or other intangibles. The following table shows the changes in our goodwill during nine months ended September 30, 2017 as well as the allocation of goodwill to our reportable operating segments for purposes of goodwill impairment testing: WSFS Cash Wealth Consolidated (Dollars in thousands) Bank Connect Management Company December 31, 2016 $ 147,396 $ — $ 20,143 $ 167,539 Remeasurement adjustments (1,588 ) — 56 (1,532 ) September 30, 2017 $ 145,808 $ — $ 20,199 $ 166,007 ASC 350 also requires that an acquired intangible asset be separately recognized if the benefit of the intangible asset is obtained through contractual or other legal rights, or if the asset can be sold, transferred, licensed, rented or exchanged, regardless of the acquirer’s intent to do so. The following tables summarize other intangible assets: September 30, 2017 (Dollars in thousands) Gross Intangible Assets Accumulated Amortization Net Intangible Assets Amortization Period Core deposits $ 10,658 $ (3,997 ) $ 6,661 10 years Customer relationships 17,560 (3,813 ) 13,747 7-15 years Non-compete agreements 221 (46 ) 175 5 years Loan servicing rights 2,056 (1,161 ) 895 10-30 years Favorable lease asset 1,932 (301 ) 1,631 10 months-18 years Total intangible assets $ 32,427 $ (9,318 ) $ 23,109 December 31, 2016 (Dollars in thousands) Gross Intangible Assets Accumulated Amortization Net Intangible Assets Amortization Period Core deposits $ 13,128 $ (5,630 ) $ 7,498 10 years Customer relationships 17,561 (2,612 ) 14,949 7-15 years Non-compete agreements 1,006 (728 ) 278 6 months-5 years Loan servicing rights 1,708 (1,067 ) 641 10-30 years Favorable lease asset 458 (116 ) 342 10 months-15 years Total intangible assets $ 33,861 $ (10,153 ) $ 23,708 Core deposits are amortized over their expected lives using the present value of the benefit of the core deposits and either accelerated or straight-line methods of amortization. During the nine months ended September 30, 2017 , we recognized amortization expense on other intangible assets of $2.3 million . The following table shows the estimated future amortization expense related to our intangible assets: (Dollars in thousands) Amortization of Intangibles Remaining in 2017 $ 757 2018 2,986 2019 2,918 2020 2,722 2021 2,396 Thereafter 11,330 Total $ 23,109

Associate Benefit Plans

Associate Benefit Plans	9 Months Ended
	Sep. 30, 2017
Postemployment Benefits [Abstract]
Associate Benefit Plans	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 October 2014 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. The following are disclosures of the net periodic benefit cost components of postretirement medical benefits measured at January 1, 2017 and 2016. Three months ended September 30, Nine months ended September 30, (Dollars in thousands) 2017 2016 2017 2016 Service cost $ 11 $ 14 $ 40 $ 43 Interest cost 16 19 54 57 Prior service cost amortization (19 ) (18 ) (57 ) (44 ) Net gain recognition (18 ) (16 ) (52 ) (47 ) Net periodic benefit cost $ (10 ) $ (1 ) $ (15 ) $ 9 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 shows the net periodic benefit cost components for the Alliance Associate Pension Plan benefits measured at January 1, 2017. (Dollars in thousands) Three months ended September 30, 2017 Nine months ended September 30, 2017 Service cost $ 10 $ 30 Interest cost 75 225 Expected Return on Plan Assets (135 ) (405 ) Prior service cost amortization — — Net gain recognition — — Net periodic benefit cost $ (50 ) $ (150 )

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Income Taxes	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. There were no unrecognized tax benefits as of September 30, 2017 . We record interest and penalties on potential income tax deficiencies as income tax expense. Our federal and state tax returns for the 2014 through 2016 tax years are subject to examination as of September 30, 2017 . We do not expect to record or realize any material unrecognized tax benefits during 2017 . 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, $0.4 million of such amortization has been reflected as income tax expense for the three months ended September 30, 2017 and September 30, 2016 , and $1.2 million of such amortization has been reflected as income tax expense for the nine months ended September 30, 2017 and September 30, 2016 . The amount of affordable housing tax credits, amortization and tax benefits recorded as income tax expense for the nine months ended September 30, 2017 were $1.2 million , $1.2 million and $0.3 million , respectively. The carrying value of the investment in affordable housing credits is $14.2 million at September 30, 2017 , compared to $15.4 million at December 31, 2016 .

Fair Value Disclosures of Finan

Fair Value Disclosures of Financial Assets and Liabilities	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Fair Value Disclosures of Financial Assets and Liabilities	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, 2017 and December 31, 2016 by level in the valuation hierarchy (as described above): September 30, 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 $ — $ 267,808 $ — $ 267,808 FNMA MBS — 431,242 — 431,242 FHLMC MBS — 85,062 — 85,062 GNMA MBS — 25,697 — 25,697 Other investments 624 — — 624 Other assets — 1,338 — 1,338 Total assets measured at fair value on a recurring basis $ 624 $ 811,147 $ — $ 811,771 Liabilities measured at fair value on a recurring basis: Other liabilities $ — $ 2,736 $ — $ 2,736 Assets measured at fair value on a nonrecurring basis: Other real estate owned $ — $ — $ 3,924 $ 3,924 Loans held for sale — 19,313 — 19,313 Impaired loans, net — — 52,903 52,903 Total assets measured at fair value on a nonrecurring basis $ — $ 19,313 $ 56,827 $ 76,140 December 31, 2016 (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 $ — $ 261,215 $ — $ 261,215 FNMA MBS — 405,764 — 405,764 FHLMC MBS — 63,515 — 63,515 GNMA MBS — 28,416 — 28,416 GSE — 35,010 — 35,010 Other investments 623 — — 623 Other assets — 1,508 — 1,508 Total assets measured at fair value on a recurring basis $ 623 $ 795,428 $ — $ 796,051 Liabilities measured at fair value on a recurring basis: Other liabilities $ — $ 3,380 $ — $ 3,380 Assets measured at fair value on a nonrecurring basis Other real estate owned $ — $ — $ 3,591 $ 3,591 Loans held for sale — 54,782 — 54,782 Impaired loans, net — — 46,499 46,499 Total assets measured at fair value on a nonrecurring basis $ — $ 54,782 $ 50,090 $ 104,872 There were no transfers between Level 1 and Level 2 of the fair value hierarchy during the nine months ended September 30, 2017 . 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, 2017 , securities classified as available-for-sale are reported at fair value using Level 2 inputs, except for one mutual fund asset acquired as part of the Penn Liberty acquisition, which is categorized as Level 1. Included in the Level 2 total are $809.8 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 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 lower of the loan balance or 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 range from 10% - 50% . 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 $51.6 million at September 30, 2017 and December 31, 2016 , respectively. The valuation allowance on impaired loans was $2.9 million as of September 30, 2017 and $3.4 million as of December 31, 2016 . 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. 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 utilized if appraisals are not available. This technique does not 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 others, other real estate owned (see discussion earlier in this note) and our investment in Visa Class B stock. Our ownership includes shares acquired at no cost from our prior participation in Visa’s network, while Visa operated as a cooperative. During 2016 and 2017 we purchased additional shares which are accounted for as non-marketable equity securities and carried at cost. We evaluate the shares carried at cost for OTTI periodically. As of September 30, 2017 , our evaluation indicated that there was no OTTI of these shares. Following resolution of Visa’s covered litigation, shares of Visa’s Class B stock will be converted to Visa Class A shares. Only current owners of Class B shares are allowed to purchase other Class B shares. We estimate the value of our Visa Class B shares to be $44.1 million as of September 30, 2017 . 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 fair value of existing debt. Other Liabilities Other liabilities includes, among others, cash flow derivatives and derivative on the residential mortgage held for sale pipeline. Valuation of our cash flow derivative is obtained from an independent pricing service and also from the derivative counterparty. Valuation for 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: (Dollars in thousands) September 30, 2017 December 31, 2016 Fair Value Measurement Book Value Fair Value Book Value Fair Value Financial assets: Cash and cash equivalents Level 1 $ 733,365 $ 733,365 $ 821,923 $ 821,923 Investment securities available for sale See previous table 810,433 810,433 794,543 794,543 Investment securities held to maturity Level 2 161,721 163,397 164,346 163,232 Loans, held for sale Level 2 19,313 19,313 54,782 54,782 Loans, net (1)(2) Level 2,3 4,617,313 4,596,437 4,397,876 4,300,963 Impaired loans, net Level 3 52,903 52,903 46,499 46,499 Stock in FHLB of Pittsburgh Level 2 33,277 33,277 38,248 38,248 Accrued interest receivable Level 2 17,789 17,789 17,027 17,027 Other assets Level 3 19,618 49,697 9,189 15,787 Financial liabilities: Deposits Level 2 5,051,719 4,681,111 4,738,438 4,423,921 Borrowed funds Level 2 1,003,308 999,551 1,267,447 1,264,170 Standby letters of credit Level 3 463 463 468 468 Accrued interest payable Level 2 3,882 3,882 1,151 1,151 Other liabilities Level 2 2,736 2,736 3,380 3,380 (1) Excludes impaired loans, net. (2) Includes reverse mortgage loans, which are categorized as Level 3. At September 30, 2017 and December 31, 2016 we had no commitments to extend credit measured at fair value.

Derivative Financial Instrument

Derivative Financial Instruments	9 Months Ended
	Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	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 Consolidated Statements of Financial Condition as of September 30, 2017 . Fair Values of Derivative Instruments (Dollars in thousands) Count Notional Balance Sheet Location Liability Derivatives (Fair Value) Derivatives designated as hedging instruments: Interest rate products 3 $ 75,000 Other Liabilities $ 2,556 Total derivatives designated as hedging instruments $ 2,556 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 and is subsequently reclassified into earnings in the period that the hedged forecast transaction affects earnings. During the nine months ended September 30, 2017 , 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, 2017 , we did not record any hedge ineffectiveness. Amounts reported in accumulated other comprehensive income 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 $0.3 million will be reclassified as an increase to interest income. During the nine months ended September 30, 2017 , $0.1 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 1 month (excluding forecasted transactions related to the payment of variable interest on existing financial instruments). As of September 30, 2017 , we had three outstanding interest rate derivatives with a notional 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 Consolidated Statements of Income for the three and nine months ended September 30, 2017 and September 30, 2016 . (Dollars in thousands) Amount of Gain Recognized in OCI on Derivative (Effective Portion) Location of Gain or (Loss)Reclassified from Accumulated OCI into Income (Effective Portion) Three months ended September 30, Derivatives in Cash Flow Hedging Relationships 2017 2016 Interest Rate Products $ 42 $ — Interest income Total $ 42 $ — (Dollars in thousands) Amount of Gain Recognized in OCI on Derivative (Effective Portion) Location of Gain or (Loss)Reclassified from Accumulated OCI into Income (Effective Portion) Nine months ended September 30, Derivatives in Cash Flow Hedging Relationships 2017 2016 Interest Rate Products $ 192 $ — Interest income Total $ 192 $ — Credit risk-related Contingent Features We have agreements with certain of our 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 of our derivative counterparties that contain a provision where if we fail to maintain our status as a well/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, 2017 , 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 $2.6 million . We have minimum collateral posting thresholds with certain of our derivative counterparties, and have posted collateral of $3.4 million against our obligations under these agreements. If we had breached any of these provisions at September 30, 2017 , 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, 2017
Segment Reporting [Abstract]
Segment Information	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 fiduciary, investment management, credit and deposit products to clients through six business lines. WSFS Wealth Investments provides insurance and brokerage products primarily to our retail banking clients. Cypress, a registered investment adviser whose primary market segment is high-net-worth individuals, offers a "balanced" investment style focused on preservation of capital and providing current income. West Capital, a registered investment adviser, is a fee-only wealth management firm which operates under a multi-family office philosophy and provides fully-customized solutions tailored to the unique needs of institutions and high-net-worth individuals. Christiana Trust provides fiduciary and investment services to personal trust clients, and trustee, agency, bankruptcy administration, custodial and commercial domicile services to corporate and institutional clients. Powdermill is a multi-family office that specializes in providing unique, independent solutions to high-net-worth individuals, families and corporate executives through a coordinated, centralized approach. WSFS Private Banking serves high-net-worth clients by delivering credit and deposit products and partnering with other business units to deliver investment management and fiduciary products and services. The following table shows segment results for the three months ended September 30, 2017 and 2016 : Three months ended September 30, 2017 Three months ended September 30, 2016 (Dollars in thousands) WSFS Bank Cash ® Wealth Management Total WSFS Bank Cash ® Wealth Total Statement of Income External customer revenues: Interest income $ 62,748 $ — $ 2,262 $ 65,010 53,332 — 2,005 55,337 Noninterest income 12,102 11,212 9,127 32,441 11,957 9,369 (r) 6,260 27,586 Total external customer revenues 74,850 11,212 11,389 97,451 65,289 9,369 8,265 82,923 Inter-segment revenues: Interest income 2,537 — 2,235 4,772 1,302 — 1,698 3,000 Noninterest income 1,721 213 37 1,971 2,140 229 27 2,396 Total inter-segment revenues 4,258 213 2,272 6,743 3,442 229 1,725 5,396 Total revenue 79,108 11,425 13,661 104,194 68,731 9,598 9,990 88,319 External customer expenses: Interest expense 8,542 — 339 8,881 6,113 — 203 6,316 Noninterest expenses 39,546 7,048 7,569 54,163 40,991 5,743 (r) 4,500 51,234 Provision for loan losses 3,065 — (169 ) 2,896 5,669 — 159 5,828 Total external customer expenses 51,153 7,048 7,739 65,940 52,773 5,743 4,862 63,378 Inter-segment expenses: Interest expense 2,235 1,856 681 4,772 1,698 790 512 3,000 Noninterest expenses 250 556 1,165 1,971 256 744 1,396 2,396 Total inter-segment expenses 2,485 2,412 1,846 6,743 1,954 1,534 1,908 5,396 Total expenses 53,638 9,460 9,585 72,683 54,727 7,277 6,770 68,774 Income before taxes $ 25,470 $ 1,965 $ 4,076 $ 31,511 $ 14,004 $ 2,321 $ 3,220 $ 19,545 Income tax provision 10,942 6,823 Consolidated net income $ 20,569 $ 12,722 Capital expenditures $ 2,688 $ 35 $ 117 $ 2,840 $ 10,900 $ 248 $ 11 $ 11,159 (r) Noninterest income and noninterest expense for the period ended September 30, 2016 have been restated to correct an immaterial error related to revenue earned for cash servicing fees. See Note 1 - Basis of Presentation for further information. The following table shows segment results for the nine months ended September 30, 2017 and 2016 : Nine months ended September 30, 2017 Nine months ended September 30, 2016 (Dollars in thousands) WSFS Bank Cash ® Wealth Total WSFS Bank Cash ® Wealth Total Statement of Income External customer revenues: Interest income $ 181,670 $ — $ 6,500 $ 188,170 $ 150,862 $ — $ 6,024 $ 156,886 Noninterest income 34,318 31,403 26,488 92,209 31,982 26,437 (r) 18,343 76,762 Total external customer revenues 215,988 31,403 32,988 280,379 182,844 26,437 24,367 233,648 Inter-segment revenues: Interest income 6,780 — 6,735 13,515 3,498 — 5,245 8,743 Noninterest income 5,791 611 113 6,515 6,211 632 76 6,919 Total inter-segment revenues 12,571 611 6,848 20,030 9,709 632 5,321 15,662 Total revenue 228,559 32,014 39,836 300,409 192,553 27,069 29,688 249,310 External customer expenses: Interest expense 23,744 — 880 24,624 15,506 — 589 16,095 Noninterest expenses 117,288 19,774 21,334 158,396 109,265 16,681 (r) 13,771 139,717 Provision for loan losses 6,097 — 804 6,901 7,675 — 187 7,862 Total external customer expenses 147,129 19,774 23,018 189,921 132,446 16,681 14,547 163,674 Inter-segment expenses: Interest expense 6,735 4,843 1,937 13,515 5,245 1,973 1,525 8,743 Noninterest expenses 724 1,944 3,847 6,515 708 2,186 4,025 6,919 Total inter-segment expenses 7,459 6,787 5,784 20,030 5,953 4,159 5,550 15,662 Total expenses 154,588 26,561 28,802 209,951 138,399 20,840 20,097 179,336 Income before taxes $ 73,971 $ 5,453 $ 11,034 $ 90,458 $ 54,154 $ 6,229 $ 9,591 $ 69,974 Income tax provision 30,382 24,004 Consolidated net income $ 60,076 $ 45,970 Capital expenditures $ 6,611 $ 103 $ 480 $ 7,194 $ 14,346 $ 672 $ 19 $ 15,037 (r) Noninterest income and noninterest expense for the period ended September 30, 2016 have been restated to correct an immaterial error related to revenue earned for cash servicing fees. See Note 1 - Basis of Presentation for further information. The following table shows significant components of segment net assets as of September 30, 2017 and December 31, 2016 : September 30, 2017 December 31, 2016 (Dollars in thousands) WSFS Bank Cash ® Wealth Total WSFS Bank Cash ® Wealth Management Total Statement of Financial Condition Cash and cash equivalents $ 94,169 $ 631,883 $ 7,313 $ 733,365 $ 100,893 $ 717,643 $ 3,387 $ 821,923 Goodwill 145,808 — 20,199 166,007 147,396 — 20,143 167,539 Other segment assets 5,757,941 2,983 215,048 5,975,972 5,545,611 3,533 226,664 5,775,808 Total segment assets $ 5,997,918 $ 634,866 $ 242,560 $ 6,875,344 $ 5,793,900 $ 721,176 $ 250,194 $ 6,765,270

Indemnifications and Guarantees

Indemnifications and Guarantees	9 Months Ended
	Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Indemnifications and Guarantees	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 for the nine months ended September 30, 2017 . Swap Guarantees We entered into agreements with three 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 both September 30, 2017 and December 31, 2016 , there were 134 variable-rate to fixed-rate swap transactions between the third party financial institutions and our customers. The initial notional aggregate amount was approximately $557.1 million at September 30, 2017 compared to $518.8 million at December 31, 2016 . At September 30, 2017 maturities ranged from under one year to ten years. The aggregate market value of these swaps to the customers was a liability of $8.6 million at September 30, 2017 and $10.9 million at December 31, 2016 . We had no reserves for the swap guarantees as of September 30, 2017 .

Change in Accumulated Other Com

Change in Accumulated Other Comprehensive (Loss) Income	9 Months Ended
	Sep. 30, 2017
Equity [Abstract]
Change in Accumulated Other Comprehensive (Loss) Income	CHANGE IN ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME Accumulated other comprehensive (loss) income 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) income are presented net of tax as a component of stockholders' equity. Amounts that are reclassified out of accumulated other comprehensive (loss) income are recorded on the Consolidated Statement of Income either as a gain or loss. Changes to accumulated other comprehensive (loss) income 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 securities held to maturity Net change in defined benefit plan Net change in fair value of derivative used for cash flow hedge Total 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 (loss) income (475 ) (99 ) (22 ) — (596 ) Net current-period other comprehensive income (loss) 814 (99 ) (22 ) 42 735 Balance, September 30, 2017 $ (3,528 ) $ 1,095 $ 890 $ (1,580 ) $ (3,123 ) Balance, June 30, 2016 $ 12,841 $ 1,592 $ 1,244 $ — $ 15,677 Other comprehensive (loss) income before reclassifications (1,112 ) — — 61 (1,051 ) Less: Amounts reclassified from accumulated other comprehensive income (645 ) (102 ) (20 ) — (767 ) Net current-period other comprehensive (loss) income (1,757 ) (102 ) (20 ) 61 (1,818 ) Balance, September 30, 2016 $ 11,084 $ 1,490 $ 1,224 $ 61 $ 13,859 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 (loss) 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 ) Balance, December 31, 2015 $ (1,887 ) $ 1,795 $ 788 $ — $ 696 Other comprehensive income before reclassifications 14,143 — — 61 14,204 Less: Amounts reclassified from accumulated other comprehensive (loss) income (1,172 ) (305 ) 436 — (1,041 ) Net current-period other comprehensive income (loss) 12,971 (305 ) 436 61 13,163 Balance, September 30, 2016 $ 11,084 $ 1,490 $ 1,224 $ 61 $ 13,859 The Consolidated Statements of Income were impacted by components of other comprehensive income (loss) as shown in the table below: (Dollars in thousands) Three Months Ended September 30, Affected line item in Consolidated Statements of Income 2017 2016 Securities available for sale: Realized gains on securities transactions $ (736 ) $ (1,040 ) Security gains, net Income taxes 261 395 Income tax provision Net of tax $ (475 ) $ (645 ) 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 $ (159 ) $ (162 ) Interest income on investment securities Income taxes 60 60 Income tax provision Net of tax $ (99 ) $ (102 ) Amortization of Defined Benefit Pension items: Prior service (credits) costs $ (19 ) $ (18 ) Actuarial (gains) losses (18 ) (16 ) Total before tax $ (37 ) $ (34 ) Salaries, benefits and other compensation Income taxes 15 14 Income tax provision Net of tax (22 ) (20 ) Total reclassifications $ (596 ) $ (767 ) (Dollars in thousands) Nine Months Ended September 30, Affected line item in Consolidated Statements of Income 2017 2016 Securities available for sale: Realized gains on securities transactions $ (1,764 ) $ (1,890 ) Security gains, net Income taxes 628 718 Income tax provision Net of tax $ (1,136 ) $ (1,172 ) 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 $ (478 ) $ (492 ) Interest income on investment securities Income taxes 181 187 Income tax provision Net of tax $ (297 ) $ (305 ) Amortization of Defined Benefit Pension items: Prior service (credits) costs $ (57 ) $ (44 ) Actuarial (gains) losses (52 ) 746 Total before tax $ (109 ) $ 702 Salaries, benefits and other compensation Income taxes 42 (266 ) Income tax provision Net of tax (67 ) 436 Total reclassifications $ (1,500 ) $ (1,041 )

Related Party Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 2017
Related Party Transactions [Abstract]
Related Party Transactions	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 unfavorable features. The outstanding balances of loans to related parties at September 30, 2017 and December 31, 2016 were $1.1 million and $1.3 million , respectively. Total deposits from related parties at September 30, 2017 and December 31, 2016 were $6.6 million and $3.6 million , respectively. During the third quarter of 2017, new loans and credit line advances to related parties and repayments were each less than $0.1 million . For the nine months ended September 30, 2017 , new loans and credit line advances to related parties were $0.4 million and repayments were $0.6 million .

Legal and Other Proceedings

Legal and Other Proceedings	9 Months Ended
	Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Legal and Other Proceedings	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. 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. On April 7, 2015, WSFS Bank received a notice of arbitration and statement of claim (the Claim) from Universitas Education, LLC (Universitas) relating to Christiana Trust acting as “insurance trustee” of the Charter Oak Trust Welfare Benefit Plan (the Trust). The actions underlying the Claim occurred during a period prior to WSFS’ acquisition of Christiana Trust. According to the allegations contained in the Claim, certain life insurance policy benefits paid to an individual claiming/purporting to be a trustee of the Trust were misappropriated by individuals associated with the plan sponsor. None of those individuals, however, were employed by or agents of Christiana Trust or WSFS Bank. It is alleged that Christiana Trust, as insurance trustee, owed a fiduciary duty to the beneficiaries of the Trust and that it breached its fiduciary duty, was negligent, and aided and abetted fraud and theft in connection with the misappropriation of funds. It is further alleged that Universitas was the rightful beneficiary under the Trust of the misappropriated funds, and thus was harmed because it did not receive the death benefits that had been paid over to the purported trustee of the Trust. While the face amounts of the two insurance policies in question total $30 million , Universitas revised its total Claim to assert an alleged loss of approximately $27 million plus costs and interest to date of $27 million . WSFS is vigorously defending itself against the Claim and believes that it has valid factual and legal defenses to the Claim. The evidentiary hearing concluded late in the third quarter of 2017 and post-trial briefing will conclude in late November 2017. It is anticipated that a decision in the arbitration will be rendered during the fourth quarter of 2017 or the first quarter of 2018. WSFS does not believe that the ultimate resolution of the Claim will have a material adverse effect on the Company, but there can be no assurance as to the ultimate outcome. 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, 2017
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 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 our 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, other-than-temporary impairment (OTTI), and the income tax valuation allowance. Among other effects, changes to these estimates could result in future impairments of investment securities, goodwill and intangible assets and 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. 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, 2017 . 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, 2016 (the "2016 Annual Report on Form 10-K") that was filed with the SEC on March 1, 2017 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. The significant accounting policies used in preparation of our Consolidated Financial Statements are disclosed in our 2016 Annual Report on Form 10-K. There have not been any material changes in our significant accounting policies from those disclosed in our 2016 Annual Report on Form 10-K.
Acquisitions	Acquisitions in 2016 On August 12, 2016, we completed the acquisition of Penn Liberty Financial Corp. (Penn Liberty), a community bank headquartered in Wayne, Pennsylvania in order to build our market share, deepen our presence in the southeastern Pennsylvania market, and enhance our customer base. The results of Penn Liberty’s operations are included in our Consolidated Financial Statements since the date of the acquisition. See Note 2 – Business Combinations for further information. During the third and fourth quarters of 2016, respectively, we acquired the assets of Powdermill Financial Solutions LLC, a multi-family office serving an affluent clientele in the local community and throughout the U.S., and West Capital Management, Inc., an independent, fee-only wealth management firm providing fully customized solutions tailored to the unique needs of institutions and high-net-worth individuals which operates under a multi-family office philosophy. These acquisitions align with our strategic plan to expand our wealth management offerings and to diversify our fee-income generating businesses.
Recent Accounting Pronouncements	RECENT ACCOUNTING PRONOUNCEMENTS Accounting Guidance Adopted in 2017 In March 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2016-05: Derivatives and Hedging (Topic 815): Effect of Derivative Contract Novations on Existing Hedge Accounting Relationships , which amends Accounting Standards Codification (ASC) Topic 815: Derivatives and Hedging. This new guidance clarifies that the novation of a derivative contract (i.e., a change in the counterparty) in a hedge accounting relationship does not, in and of itself, cause a hedge accounting relationship to be discontinued because it does not represent a termination of the original derivative instrument or a change in the critical terms of the hedge relationship. This new guidance is effective for annual reporting periods beginning after December 15, 2016 and may be adopted prospectively or retroactively. Early adoption is permitted, including adoption in an interim period. The Company adopted this accounting guidance during the quarter ended March 31, 2017 on a prospective basis with no impact to our Consolidated Financial Statements. In March 2016, the FASB issued ASU No. 2016-06, Contingent Put and Call Options in Debt Instruments, Derivatives and Hedging (Topic 815). ASU 2016-06 clarifies that determining whether the economic characteristics of a put or call are clearly and closely related to its debt host requires only an assessment of the four-step decision sequence outlined in FASB ASC paragraph 815-15-25-24. Additionally, entities are not required to separately assess whether the contingency itself is clearly and closely related. The standard is effective for public business entities in interim and annual periods in fiscal years beginning after December 15, 2016. Early adoption is permitted in any interim period for which the entity’s financial statements have not been issued, but would be retroactively applied to the beginning of the year that includes the interim period. The standard requires a modified retrospective transition approach, with a cumulative catch-up adjustment to opening retained earnings in the period of adoption. For instruments that are eligible for the fair value option, an entity has a one-time option to irrevocably elect to measure the debt instrument affected by the standard in its entirety at fair value with changes in fair value recognized in earnings. The Company adopted this accounting guidance during the quarter ended March 31, 2017 with no impact on our Consolidated Statements of Income or Consolidated Statements of Financial Condition. In March 2016, the FASB issued ASU No. 2016-07, Simplifying the Transition to the Equity Method of Accounting, Investments - Equity Method and Joint Ventures (Topic 323). ASU 2016-07 eliminates the requirement for an investor to retroactively apply the equity method when its increase in ownership interest (or degree of influence) in an investee triggers equity method accounting. The standard is effective for all entities in annual and interim periods in fiscal years beginning after December 15, 2016. Early adoption is permitted. The new guidance will be applied prospectively to changes in ownership (or influence) after the adoption date. The Company adopted this accounting guidance during the quarter ended March 31, 2017 on a prospective basis with no impact to our Consolidated Financial Statements. Accounting Guidance Pending Adoption at September 30, 2017 In May 2014, the FASB issued 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 will require an entity to recognize revenue when it transfers promised goods or services to customers using a five-step model that requires entities to 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 defers 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 of certain provisions in Topic 606. These ASC updates are effective for public business entities 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 standard permits the use of either the retrospective or retrospectively with the cumulative effect transition method. The Company will adopt the standard on January 1, 2018 using the retrospective with the cumulative effect transition method. For revenue streams determined to be within the scope of the standard, we have substantially completed our impact analysis, the results of which has shown an immaterial effect on our Consolidated Financial Statements. The Company is in the process of updating our accounting policies, processes and related internal controls to incorporate the changes from the standard. Topic 606 also includes expanded disclosure requirements which we are currently in the process of drafting. Although the impact of this adoption is expected to be immaterial on our financial statements, we do anticipate adding additional detail to our revenue disclosures. 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, minus 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. ASU 2016-01 is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is permitted. Entities may apply this guidance on a prospective or retrospective basis. The Company will adopt the standard on a prospective basis and does not expect the prospective application of this guidance to have a material impact on its Consolidated Financial Statements. 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 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 for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. The Company does not plan to early adopt this guidance and is currently in the process of identifying our complete lease population as defined by this guidance. The Company is also evaluating our internal systems, accounting policies, processes and related internal controls for potential impacts. Our preliminary review of this guidance suggests that adoption will result in additional assets and liabilities on our Consolidated Balance Sheet. The Company will adopt this guidance on January 1, 2019. 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 is in the early stages of evaluating the impact of this guidance on its Consolidated Financial Statements, internal systems, accounting policies, processes and related internal controls. Our preliminary review of this guidance 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 and significant estimates and judgments made by management at the time of adoption. The Company will adopt this guidance on January 1, 2020. 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 does not expect the application of this guidance to have any impact on its 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 does not expect the application of this guidance to have any impact on its Consolidated Financial Statements. 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 for public entities 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. The Company does not expect the application of this guidance to have a material impact on its Consolidated Financial Statements. 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, the new guidance clarifies that 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, the new guidance clarifies that each distinct nonfinancial asset and in-substance nonfinancial asset should be derecognized when the counterparty obtains control of it. The guidance is effective for public entities 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 is currently evaluating the impact of adopting ASU 2017-05 on its Consolidated Financial Statements. 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 for public entities in annual and interim periods in fiscal years beginning after December 15, 2017. Early adoption is permitted. 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 for public entities 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 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 for all entities 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 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 . The new guidance changes both the designation and measurement guidance for qualifying hedging relationships and 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. Additionally, the new guidance provides entities the ability to apply hedge accounting to additional hedging strategies. The guidance is effective for all entities in annual and interim periods beginning after December 15, 2018. Early adoption is permitted. The Company does not expect the application of this guidance to have a material impact on its Consolidated Financial Statements.

Basis of Presentation Basis of

Basis of Presentation Basis of Presentation (Tables)	9 Months Ended
	Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Error Corrections and Prior Period Adjustments	As a result, the Consolidated Statements of Income have been revised to reflect these changes, as follows: Three months ended September 30, 2016 Nine months ended September 30, 2016 (Dollars in thousands) As originally reported Adjustments As revised As originally reported Adjustments As revised Noninterest income - Other income $ 4,125 $ 737 $ 4,862 $ 12,017 $ 1,994 $ 14,011 Noninterest expense - Other operating expense 8,074 737 8,811 22,558 1,994 24,552

Business Combinations (Tables)

Business Combinations (Tables) - Penn Liberty Financial Corporation	9 Months Ended
	Sep. 30, 2017
Business Acquisition [Line Items]
Summary of Consideration Paid and Fair Value of Identifiable Assets Acquired and Liabilities Assumed	In connection with the acquisition of Penn Liberty, the consideration transferred and the fair value of identifiable assets acquired and liabilities assumed, including remeasurement adjustments subsequent to the date of acquisition, are summarized in the following table: (Dollars in thousands) Fair Value Consideration Transferred: Common shares issued (1,806,748) $ 68,352 Cash paid to Penn Liberty stock and option holders 40,549 Value of consideration 108,901 Assets acquired: Cash and due from banks 102,301 Investment securities 627 Loans 483,203 Premises and equipment 6,817 Deferred income taxes 6,542 Bank owned life insurance 8,666 Core deposit intangible 2,882 Other real estate owned 996 Other assets 12,085 Total assets 624,119 Liabilities assumed: Deposits 568,706 Other borrowings 10,000 Other liabilities 3,738 Total liabilities 582,444 Net assets acquired: 41,675 Goodwill resulting from acquisition of Penn Liberty $ 67,226
Schedule of Change to Goodwill	The following table details the change to goodwill recorded subsequent to acquisition: (Dollars in thousands) Fair Value Goodwill resulting from the acquisition of Penn Liberty reported as of December 31, 2016 $ 68,814 Effects of adjustments to: Deferred income taxes 880 Loans 279 Other assets (1,440 ) Other liabilities (1,307 ) Adjusted goodwill resulting from the acquisition of Penn Liberty as of September 30, 2017 $ 67,226

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2017
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) 2017 2016 2017 2016 Numerator: Net income $ 20,569 $ 12,722 $ 60,076 $ 45,970 Denominator: Weighted average basic shares 31,420 30,520 31,424 29,914 Dilutive potential common shares 848 797 856 747 Weighted average fully diluted shares 32,268 31,317 32,280 30,661 Earnings per share: Basic $ 0.65 $ 0.42 $ 1.91 $ 1.54 Diluted $ 0.64 $ 0.41 $ 1.86 $ 1.50 Outstanding common stock equivalents having no dilutive effect — 1 5 10

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2017
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 available-for-sale and held-to-maturity investment securities. None of our investment securities are classified as trading. (Dollars in thousands) Amortized Cost Gross Unrealized Gain Gross Unrealized Loss Fair Value Available-for-Sale Securities: September 30, 2017 CMO $ 269,267 $ 895 $ 2,354 $ 267,808 FNMA MBS 434,920 1,545 5,223 431,242 FHLMC MBS 85,564 277 779 85,062 GNMA MBS 25,723 289 315 25,697 Other investments 640 — 16 624 $ 816,114 $ 3,006 $ 8,687 $ 810,433 December 31, 2016 GSE $ 35,061 $ 9 $ 60 $ 35,010 CMO 264,607 566 3,957 261,216 FNMA MBS 414,218 950 9,404 405,764 FHLMC MBS 64,709 135 1,330 63,514 GNMA MBS 28,540 303 427 28,416 Other investments 626 — 3 623 $ 807,761 $ 1,963 $ 15,181 $ 794,543 (Dollars in thousands) Amortized Cost Gross Unrealized Gain Gross Unrealized Loss Fair Value Held-to-Maturity Securities (1) September 30, 2017 State and political subdivisions $ 161,721 $ 1,796 $ 120 $ 163,397 December 31, 2016 State and political subdivisions $ 164,346 $ 271 $ 1,385 $ 163,232 (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 $1.8 million and $2.2 million at September 30, 2017 and December 31, 2016 , respectively, related to securities transferred, which are offset in Accumulated Other Comprehensive Income, net of tax
Schedule of Maturities of Investment Securities Available-for-Sale and Held-to-Maturity	The scheduled maturities of investment securities available for sale and held to maturity at September 30, 2017 and December 31, 2016 are presented in the table below: Available for Sale (1) Amortized Fair (Dollars in thousands) Cost Value September 30, 2017 Within one year $ — $ — After one year but within five years 4,007 4,002 After five years but within ten years 201,919 198,334 After ten years 609,548 607,473 $ 815,474 $ 809,809 December 31, 2016 Within one year $ 16,009 $ 16,017 After one year but within five years 19,052 18,992 After five years but within ten years 276,635 270,300 After ten years 495,439 488,611 $ 807,135 $ 793,920 Held to Maturity Amortized Fair (Dollars in thousands) Cost Value September 30, 2017 Within one year $ 328 $ 326 After one year but within five years 5,437 5,491 After five years but within ten years 15,672 15,838 After ten years 140,284 141,742 $ 161,721 $ 163,397 December 31, 2016 Within one year $ — $ — After one year but within five years 6,168 6,162 After five years but within ten years 8,882 8,870 After ten years 149,296 148,200 $ 164,346 $ 163,232 (1) Included in the investment portfolio, but not in the table above, is a mutual fund with an amortized cost and fair value of $0.6 million and $0.6 million as of September 30, 2017 and December 31, 2016 which has no stated maturity.
Schedule of Investment Securities' Gross Unrealized Losses and Fair Value by Investment Category	For 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 securities were in a continuous unrealized loss position at September 30, 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 securities: CMO $ 114,939 $ 1,188 $ 43,775 $ 1,166 $ 158,714 $ 2,354 FNMA MBS 188,153 2,299 74,801 2,924 262,954 5,223 FHLMC MBS 45,317 497 7,892 282 53,209 779 GNMA MBS 4,856 83 10,687 232 15,543 315 Other investments — — 624 16 624 16 Total temporarily impaired investments $ 353,265 $ 4,067 $ 137,779 $ 4,620 $ 491,044 $ 8,687 Less than 12 months 12 months or longer Total Fair Unrealized Fair Unrealized Fair Unrealized (Dollars in thousands) Value Loss Value Loss Value Loss Held-to-maturity securities: State and political subdivisions $ 13,571 $ 48 $ 6,700 $ 72 $ 20,271 $ 120 Total temporarily impaired investments $ 13,571 $ 48 $ 6,700 $ 72 $ 20,271 $ 120 For 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 securities were in a continuous unrealized loss position at December 31, 2016 . 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 securities: GSE $ 21,996 $ 60 $ — $ — $ 21,996 $ 60 CMO 160,572 3,867 4,654 90 165,226 3,957 FNMA MBS 50,878 1,330 — — 50,878 1,330 FHLMC MBS 300,403 9,404 — — 300,403 9,404 GNMA MBS 16,480 427 — — 16,480 427 Other investments 623 3 — — 623 3 Total temporarily impaired investments $ 550,952 $ 15,091 $ 4,654 $ 90 $ 555,606 $ 15,181 Less than 12 months 12 months or longer Total Fair Unrealized Fair Unrealized Fair Unrealized (Dollars in thousands) Value Loss Value Loss Value Loss Held-to-maturity securities: State and political subdivisions $ 112,642 $ 1,374 $ 695 $ 11 $ 113,337 $ 1,385 Total temporarily impaired investments $ 112,642 $ 1,374 $ 695 $ 11 $ 113,337 $ 1,385

Loans (Tables)

Loans (Tables)	9 Months Ended
	Sep. 30, 2017
Receivables [Abstract]
Summary of Loan Portfolio by Category	The following table shows our loan portfolio by category: (Dollars in thousands) September 30, 2017 December 31, 2016 Commercial and industrial $ 1,388,094 $ 1,287,731 Owner-occupied commercial 1,096,753 1,078,162 Commercial mortgages 1,157,074 1,163,554 Construction 293,317 222,712 Residential (1) 262,147 289,611 Consumer 520,276 450,029 4,717,661 4,491,799 Less: Deferred fees, net 7,244 7,673 Allowance for loan losses 40,201 39,751 Net loans $ 4,670,216 $ 4,444,375 (1) Includes reverse mortgages, at fair value of $21.4 million at September 30, 2017 and $22.6 million at December 31, 2016 .
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, 2017 December 31, 2016 Outstanding principal balance $ 30,465 $ 41,574 Carrying amount 24,039 33,104 Allowance for loan losses 542 510
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, 2017 : (Dollars in thousands) Nine months ended September 30, 2017 Balance at beginning of period $ 5,150 Accretion (2,158 ) Reclassification from nonaccretable difference 1,246 Additions/adjustments (1,089 ) Disposals (345 ) Balance at end of period $ 2,804

Allowance for Loan Losses and32

Allowance for Loan Losses and Credit Quality Information (Tables)	9 Months Ended
	Sep. 30, 2017
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, 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 evaluated for: 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. The following table provides the activity of the allowance for loan losses and loan balances for the three and nine months ended September 30, 2016 : (Dollars in thousands) Commercial Owner - occupied Commercial Commercial Mortgages Construction Residential (1) Consumer Complexity Risk (2) Total Three months ended September 30, 2016 Allowance for loan losses Beginning balance $ 11,402 $ 6,723 $ 8,135 $ 3,308 $ 2,352 $ 5,826 $ — $ 37,746 Charge-offs (3,737 ) (1,415 ) (1 ) (30 ) (43 ) (518 ) — (5,744 ) Recoveries 223 15 197 440 33 290 — 1,198 Provision (credit) 3,714 1,437 1,089 (824 ) (179 ) 401 — 5,638 Provision for acquired loans 117 185 (48 ) (76 ) 12 — — 190 Ending balance $ 11,719 $ 6,945 $ 9,372 $ 2,818 $ 2,175 $ 5,999 $ — $ 39,028 Nine months ended September 30, 2016 Allowance for loan losses Beginning balance $ 11,156 $ 6,670 $ 6,487 $ 3,521 $ 2,281 $ 5,964 $ 1,010 $ 37,089 Charge-offs (4,643 ) (1,556 ) (79 ) (59 ) (72 ) (1,967 ) — (8,376 ) Recoveries 557 66 310 486 112 922 — 2,453 Provision (credit) 4,551 1,564 2,650 (1,104 ) (177 ) 1,118 (1,010 ) 7,592 Provision for acquired loans 98 201 4 (26 ) 31 (38 ) — 270 Ending balance $ 11,719 $ 6,945 $ 9,372 $ 2,818 $ 2,175 $ 5,999 $ — $ 39,028 Period-end allowance allocated to: Loans individually evaluated for impairment $ 692 $ — $ 1,264 $ 215 $ 989 $ 201 $ — $ 3,361 Loans collectively evaluated for impairment 10,974 6,923 7,982 2,549 1,167 5,798 — 35,393 Acquired loans evaluated for impairment 53 22 126 54 19 — — 274 Ending balance $ 11,719 $ 6,945 $ 9,372 $ 2,818 $ 2,175 $ 5,999 $ — $ 39,028 Period-end loan balances: Loans individually evaluated for impairment (3) $ 4,198 $ 2,510 $ 7,165 $ 1,419 $ 13,957 $ 8,105 $ — $ 37,354 Loans collectively evaluated for impairment 1,077,258 869,051 904,328 182,338 150,318 368,428 — 3,551,721 Acquired nonimpaired loans 175,570 175,411 229,530 21,627 103,537 61,257 — 766,932 Acquired impaired loans 9,691 10,673 12,880 3,592 899 368 — 38,103 Ending balance (4) $ 1,266,717 $ 1,057,645 $ 1,153,903 $ 208,976 $ 268,711 $ 438,158 $ — $ 4,394,110 (1) Period-end loan balance excludes reverse mortgages, at fair value of $23.1 million . (2) Represents the portion of the allowance for loan losses established to capture factors not already included in other components in our allowance for loan losses methodology. (3) The difference between this amount and nonaccruing loans represents accruing troubled debt restructured loans of $14.2 million for the period ending September 30, 2016 . Accruing troubled debt restructured loans are considered impaired loans. (4) 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, 2017 (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 $ 673 $ 136 $ 685 $ 1,494 $ 1,368,660 $ 5,235 $ 12,705 $ 1,388,094 Owner-occupied commercial 998 — — 998 1,085,008 7,401 3,346 1,096,753 Commercial mortgages 1,320 — — 1,320 1,136,982 9,969 8,803 1,157,074 Construction 1,033 — — 1,033 289,499 946 1,839 293,317 Residential (1) 1,708 364 557 2,629 232,567 788 4,733 240,717 Consumer 593 771 96 1,460 516,463 243 2,110 520,276 Total (2) $ 6,325 $ 1,271 $ 1,338 $ 8,934 $ 4,629,179 $ 24,582 $ 33,536 $ 4,696,231 % of Total Loans 0.13 % 0.03 % 0.03 % 0.19 % 98.58 % 0.52 % 0.71 % 100 % (1) Residential accruing current balances excludes reverse mortgages at fair value of $21.4 million . (2) The balances above include a total of $596.5 million of acquired nonimpaired loans. December 31, 2016 (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 $ 1,507 $ 278 $ — $ 1,785 $ 1,277,748 $ 6,183 $ 2,015 $ 1,287,731 Owner-occupied commercial 116 540 — 656 1,063,306 12,122 2,078 1,078,162 Commercial mortgages 167 — — 167 1,143,180 10,386 9,821 1,163,554 Construction 132 — — 132 218,886 3,694 — 222,712 Residential (1) 3,176 638 153 3,967 257,234 860 4,967 267,028 Consumer 392 346 285 1,023 444,642 369 3,995 450,029 Total (2) $ 5,490 $ 1,802 $ 438 $ 7,730 $ 4,404,996 $ 33,614 $ 22,876 $ 4,469,216 % of Total Loans 0.12 % 0.04 % 0.01 % 0.17 % 98.57 % 0.75 % 0.51 % 100 % (1) Residential accruing current balances excludes reverse mortgages, at fair value of $22.6 million . (2) The balances above include a total of $724.1 million of acquired nonimpaired loans
Analysis of Impaired Loans	The following tables provide an analysis of our impaired loans at September 30, 2017 and December 31, 2016 : September 30, 2017 (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 $ 14,814 $ 3,129 $ 11,685 $ 1,513 $ 16,967 $ 11,981 Owner-occupied commercial 4,669 3,346 1,323 33 4,984 5,583 Commercial mortgages 12,190 7,267 4,923 281 18,385 12,941 Construction 2,111 1,839 272 36 2,377 3,769 Residential 14,621 8,343 6,278 884 17,517 14,652 Consumer 7,447 5,914 1,533 202 9,283 8,216 Total (2) $ 55,852 $ 29,838 $ 26,014 $ 2,949 $ 69,513 $ 57,142 (1) Reflects loan balances at or written down to their remaining book balance. (2) The above includes acquired impaired loans totaling $7.3 million in the ending loan balance and $8.3 million in the contractual principal balance of the total acquired impaired loan portfolio of $24.6 million December 31, 2016 (Dollars in thousands) Ending Loan Balances Loans with No Related (1) Loans with Related Reserve Related Reserve Contractual Principal Balances Average Loan Balances Commercial $ 4,250 $ 1,395 $ 2,855 $ 505 $ 5,572 $ 5,053 Owner-occupied commercial 4,650 2,078 2,572 15 5,129 3,339 Commercial mortgages 15,065 4,348 10,717 1,433 20,716 7,323 Construction 3,662 — 3,662 303 3,972 2,376 Residential 14,256 7,122 7,134 934 17,298 15,083 Consumer 8,021 6,561 1,460 215 11,978 7,910 Total (2) $ 49,904 $ 21,504 $ 28,400 $ 3,405 $ 64,665 $ 41,084 (1) Reflects loan balances at or written down to their remaining book balance. (2) The above includes acquired impaired loans totaling $12.8 million in the ending loan balance and $15.0 million in the contractual principal balance of the total acquired impaired loan portfolio of $33.6 million .
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, 2017 (Dollars in thousands) Commercial Owner-occupied Commercial Commercial Mortgages Construction Total Commercial (1) Amount % Risk Rating: Special mention $ 12,474 $ 2,858 $ — $ 3,644 $ 18,976 Substandard: Accrual 52,237 25,083 64 754 78,138 Nonaccrual 11,485 3,346 8,672 1,839 25,342 Doubtful 1,220 — 131 — 1,351 Total Special Mention and Substandard 77,416 31,287 8,867 6,237 123,807 3 % Acquired impaired 5,235 7,401 9,969 946 23,551 1 % Pass 1,305,443 1,058,065 1,138,238 286,134 3,787,880 96 % Total $ 1,388,094 $ 1,096,753 $ 1,157,074 $ 293,317 $ 3,935,238 100 % (1) Table includes $479.2 million of acquired nonimpaired loans as of September 30, 2017 . December 31, 2016 (Dollars in thousands) Commercial Owner-occupied Commercial Commercial Mortgages Construction Total Commercial (1) Amount % Risk Rating: Special mention $ 17,630 $ 11,419 $ 34,198 $ — $ 63,247 Substandard: Accrual 45,067 19,871 239 2,193 67,370 Nonaccrual 1,693 2,078 8,574 — 12,345 Doubtful 322 — 1,247 — 1,569 Total Special Mention and Substandard 64,712 33,368 44,258 2,193 144,531 4 % Acquired impaired 6,183 12,122 10,386 3,694 32,385 1 % Pass 1,216,836 1,032,672 1,108,910 216,825 3,575,243 95 % Total $ 1,287,731 $ 1,078,162 $ 1,163,554 $ 222,712 $ 3,752,159 100 % (1) Table includes $573.5 million of acquired nonimpaired loans as of December 31, 2016 .
Schedule of Consumer Credit Exposure	Residential and Consumer Credit Exposure (Dollars in thousands) Residential (2) Consumer Total Residential and Consumer (3) September 30, December 31, September 30, December 31, September 30, 2017 December 31, 2016 2017 2016 2017 2016 Amount Percent Amount Percent Nonperforming (1) $ 14,060 $ 13,547 $ 7,409 $ 7,863 $ 21,469 3 % $ 21,410 3 % Acquired impaired loans 788 860 243 369 1,031 — % 1,229 — % Performing 225,869 252,621 512,624 441,797 738,493 97 % 694,418 97 % Total $ 240,717 $ 267,028 $ 520,276 $ 450,029 $ 760,993 100 % $ 717,057 100 % (1) Includes $14.6 million as of September 30, 2017 and $12.4 million as of December 31, 2016 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 $21.4 million and $22.6 million of reverse mortgages at fair value as of September 30, 2017 and December 31, 2016 , respectively. (3) Total includes $117.3 million and $150.5 million in acquired nonimpaired loans as of September 30, 2017 and December 31, 2016 , 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, 2017 : Contractual payment reduction and term extension Maturity Date Extension Discharged in bankruptcy Other (1) Total Commercial 1 1 — — 2 Owner-occupied commercial — 1 — — 1 Construction — 2 — 1 3 Residential 2 — 3 — 5 Consumer 1 — 11 6 18 Total 4 4 14 7 29 (1) Other includes underwriting exceptions. The following table presents the balance of TDRs as of the indicated dates: (Dollars in thousands) September 30, 2017 December 31, 2016 Performing TDRs $ 14,905 $ 14,336 Nonperforming TDRs 11,114 8,451 Total TDRs $ 26,019 $ 22,787 The following table presents loans identified as TDRs during the three and nine months ended September 30, 2017 and 2016 . Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 (Dollars in thousands) Pre Modification Post Modification Pre Modification Post Modification Pre Modification Post Modification Pre Modification Post Modification Commercial $ — $ — $ — $ — $ 781 $ 781 $ 1,125 $ 1,125 Owner-occupied commercial — — — — 3,071 3,071 — — Commercial mortgages — — — — — — — — Construction — — — — 1,836 1,836 — — Residential 1,058 1,058 797 797 1,300 1,300 1,523 1,523 Consumer 609 609 278 278 1,867 1,867 733 733 Total $ 1,667 $ 1,667 $ 1,075 $ 1,075 $ 8,855 $ 8,855 $ 3,381 $ 3,381

Goodwill and Intangibles (Table

Goodwill and Intangibles (Tables)	9 Months Ended
	Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Allocation of Goodwill to Our Reportable Operating Segments for Purposes of Goodwill Impairment Testing	The following table shows the changes in our goodwill during nine months ended September 30, 2017 as well as the allocation of goodwill to our reportable operating segments for purposes of goodwill impairment testing: WSFS Cash Wealth Consolidated (Dollars in thousands) Bank Connect Management Company December 31, 2016 $ 147,396 $ — $ 20,143 $ 167,539 Remeasurement adjustments (1,588 ) — 56 (1,532 ) September 30, 2017 $ 145,808 $ — $ 20,199 $ 166,007
Summary of Other Intangible Assets	The following tables summarize other intangible assets: September 30, 2017 (Dollars in thousands) Gross Intangible Assets Accumulated Amortization Net Intangible Assets Amortization Period Core deposits $ 10,658 $ (3,997 ) $ 6,661 10 years Customer relationships 17,560 (3,813 ) 13,747 7-15 years Non-compete agreements 221 (46 ) 175 5 years Loan servicing rights 2,056 (1,161 ) 895 10-30 years Favorable lease asset 1,932 (301 ) 1,631 10 months-18 years Total intangible assets $ 32,427 $ (9,318 ) $ 23,109 December 31, 2016 (Dollars in thousands) Gross Intangible Assets Accumulated Amortization Net Intangible Assets Amortization Period Core deposits $ 13,128 $ (5,630 ) $ 7,498 10 years Customer relationships 17,561 (2,612 ) 14,949 7-15 years Non-compete agreements 1,006 (728 ) 278 6 months-5 years Loan servicing rights 1,708 (1,067 ) 641 10-30 years Favorable lease asset 458 (116 ) 342 10 months-15 years Total intangible assets $ 33,861 $ (10,153 ) $ 23,708
Schedule of Estimated Amortization Expense of Intangibles	The following table shows the estimated future amortization expense related to our intangible assets: (Dollars in thousands) Amortization of Intangibles Remaining in 2017 $ 757 2018 2,986 2019 2,918 2020 2,722 2021 2,396 Thereafter 11,330 Total $ 23,109

Associate Benefit Plans (Tables

Associate Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2017
Postemployment Benefits [Abstract]
Schedule of Net Periodic Benefit Cost Components of Postretirement Benefits	The following are disclosures of the net periodic benefit cost components of postretirement medical benefits measured at January 1, 2017 and 2016. Three months ended September 30, Nine months ended September 30, (Dollars in thousands) 2017 2016 2017 2016 Service cost $ 11 $ 14 $ 40 $ 43 Interest cost 16 19 54 57 Prior service cost amortization (19 ) (18 ) (57 ) (44 ) Net gain recognition (18 ) (16 ) (52 ) (47 ) Net periodic benefit cost $ (10 ) $ (1 ) $ (15 ) $ 9 The following table shows the net periodic benefit cost components for the Alliance Associate Pension Plan benefits measured at January 1, 2017. (Dollars in thousands) Three months ended September 30, 2017 Nine months ended September 30, 2017 Service cost $ 10 $ 30 Interest cost 75 225 Expected Return on Plan Assets (135 ) (405 ) Prior service cost amortization — — Net gain recognition — — Net periodic benefit cost $ (50 ) $ (150 )

Fair Value Disclosures of Fin35

Fair Value Disclosures of Financial Assets and Liabilities (Tables)	9 Months Ended
	Sep. 30, 2017
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, 2017 and December 31, 2016 by level in the valuation hierarchy (as described above): September 30, 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 $ — $ 267,808 $ — $ 267,808 FNMA MBS — 431,242 — 431,242 FHLMC MBS — 85,062 — 85,062 GNMA MBS — 25,697 — 25,697 Other investments 624 — — 624 Other assets — 1,338 — 1,338 Total assets measured at fair value on a recurring basis $ 624 $ 811,147 $ — $ 811,771 Liabilities measured at fair value on a recurring basis: Other liabilities $ — $ 2,736 $ — $ 2,736 Assets measured at fair value on a nonrecurring basis: Other real estate owned $ — $ — $ 3,924 $ 3,924 Loans held for sale — 19,313 — 19,313 Impaired loans, net — — 52,903 52,903 Total assets measured at fair value on a nonrecurring basis $ — $ 19,313 $ 56,827 $ 76,140 December 31, 2016 (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 $ — $ 261,215 $ — $ 261,215 FNMA MBS — 405,764 — 405,764 FHLMC MBS — 63,515 — 63,515 GNMA MBS — 28,416 — 28,416 GSE — 35,010 — 35,010 Other investments 623 — — 623 Other assets — 1,508 — 1,508 Total assets measured at fair value on a recurring basis $ 623 $ 795,428 $ — $ 796,051 Liabilities measured at fair value on a recurring basis: Other liabilities $ — $ 3,380 $ — $ 3,380 Assets measured at fair value on a nonrecurring basis Other real estate owned $ — $ — $ 3,591 $ 3,591 Loans held for sale — 54,782 — 54,782 Impaired loans, net — — 46,499 46,499 Total assets measured at fair value on a nonrecurring basis $ — $ 54,782 $ 50,090 $ 104,872
Book Value and Estimated Fair Value of Financial Instruments	The book value and estimated fair value of our financial instruments are as follows: (Dollars in thousands) September 30, 2017 December 31, 2016 Fair Value Measurement Book Value Fair Value Book Value Fair Value Financial assets: Cash and cash equivalents Level 1 $ 733,365 $ 733,365 $ 821,923 $ 821,923 Investment securities available for sale See previous table 810,433 810,433 794,543 794,543 Investment securities held to maturity Level 2 161,721 163,397 164,346 163,232 Loans, held for sale Level 2 19,313 19,313 54,782 54,782 Loans, net (1)(2) Level 2,3 4,617,313 4,596,437 4,397,876 4,300,963 Impaired loans, net Level 3 52,903 52,903 46,499 46,499 Stock in FHLB of Pittsburgh Level 2 33,277 33,277 38,248 38,248 Accrued interest receivable Level 2 17,789 17,789 17,027 17,027 Other assets Level 3 19,618 49,697 9,189 15,787 Financial liabilities: Deposits Level 2 5,051,719 4,681,111 4,738,438 4,423,921 Borrowed funds Level 2 1,003,308 999,551 1,267,447 1,264,170 Standby letters of credit Level 3 463 463 468 468 Accrued interest payable Level 2 3,882 3,882 1,151 1,151 Other liabilities Level 2 2,736 2,736 3,380 3,380 (1) Excludes impaired loans, net. (2) Includes reverse mortgage loans, which are categorized as Level 3.

Derivative Financial Instrume36

Derivative Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2017
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 Consolidated Statements of Financial Condition as of September 30, 2017 . Fair Values of Derivative Instruments (Dollars in thousands) Count Notional Balance Sheet Location Liability Derivatives (Fair Value) Derivatives designated as hedging instruments: Interest rate products 3 $ 75,000 Other Liabilities $ 2,556 Total derivatives designated as hedging instruments $ 2,556
Summary of Company's Derivative Financial Instruments	The table below presents the effect of the derivative financial instruments on the Consolidated Statements of Income for the three and nine months ended September 30, 2017 and September 30, 2016 . (Dollars in thousands) Amount of Gain Recognized in OCI on Derivative (Effective Portion) Location of Gain or (Loss)Reclassified from Accumulated OCI into Income (Effective Portion) Three months ended September 30, Derivatives in Cash Flow Hedging Relationships 2017 2016 Interest Rate Products $ 42 $ — Interest income Total $ 42 $ — (Dollars in thousands) Amount of Gain Recognized in OCI on Derivative (Effective Portion) Location of Gain or (Loss)Reclassified from Accumulated OCI into Income (Effective Portion) Nine months ended September 30, Derivatives in Cash Flow Hedging Relationships 2017 2016 Interest Rate Products $ 192 $ — Interest income Total $ 192 $ —

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2017
Segment Reporting [Abstract]
Details of Segment Information	The following table shows segment results for the three months ended September 30, 2017 and 2016 : Three months ended September 30, 2017 Three months ended September 30, 2016 (Dollars in thousands) WSFS Bank Cash ® Wealth Management Total WSFS Bank Cash ® Wealth Total Statement of Income External customer revenues: Interest income $ 62,748 $ — $ 2,262 $ 65,010 53,332 — 2,005 55,337 Noninterest income 12,102 11,212 9,127 32,441 11,957 9,369 (r) 6,260 27,586 Total external customer revenues 74,850 11,212 11,389 97,451 65,289 9,369 8,265 82,923 Inter-segment revenues: Interest income 2,537 — 2,235 4,772 1,302 — 1,698 3,000 Noninterest income 1,721 213 37 1,971 2,140 229 27 2,396 Total inter-segment revenues 4,258 213 2,272 6,743 3,442 229 1,725 5,396 Total revenue 79,108 11,425 13,661 104,194 68,731 9,598 9,990 88,319 External customer expenses: Interest expense 8,542 — 339 8,881 6,113 — 203 6,316 Noninterest expenses 39,546 7,048 7,569 54,163 40,991 5,743 (r) 4,500 51,234 Provision for loan losses 3,065 — (169 ) 2,896 5,669 — 159 5,828 Total external customer expenses 51,153 7,048 7,739 65,940 52,773 5,743 4,862 63,378 Inter-segment expenses: Interest expense 2,235 1,856 681 4,772 1,698 790 512 3,000 Noninterest expenses 250 556 1,165 1,971 256 744 1,396 2,396 Total inter-segment expenses 2,485 2,412 1,846 6,743 1,954 1,534 1,908 5,396 Total expenses 53,638 9,460 9,585 72,683 54,727 7,277 6,770 68,774 Income before taxes $ 25,470 $ 1,965 $ 4,076 $ 31,511 $ 14,004 $ 2,321 $ 3,220 $ 19,545 Income tax provision 10,942 6,823 Consolidated net income $ 20,569 $ 12,722 Capital expenditures $ 2,688 $ 35 $ 117 $ 2,840 $ 10,900 $ 248 $ 11 $ 11,159 (r) Noninterest income and noninterest expense for the period ended September 30, 2016 have been restated to correct an immaterial error related to revenue earned for cash servicing fees. See Note 1 - Basis of Presentation for further information. The following table shows segment results for the nine months ended September 30, 2017 and 2016 : Nine months ended September 30, 2017 Nine months ended September 30, 2016 (Dollars in thousands) WSFS Bank Cash ® Wealth Total WSFS Bank Cash ® Wealth Total Statement of Income External customer revenues: Interest income $ 181,670 $ — $ 6,500 $ 188,170 $ 150,862 $ — $ 6,024 $ 156,886 Noninterest income 34,318 31,403 26,488 92,209 31,982 26,437 (r) 18,343 76,762 Total external customer revenues 215,988 31,403 32,988 280,379 182,844 26,437 24,367 233,648 Inter-segment revenues: Interest income 6,780 — 6,735 13,515 3,498 — 5,245 8,743 Noninterest income 5,791 611 113 6,515 6,211 632 76 6,919 Total inter-segment revenues 12,571 611 6,848 20,030 9,709 632 5,321 15,662 Total revenue 228,559 32,014 39,836 300,409 192,553 27,069 29,688 249,310 External customer expenses: Interest expense 23,744 — 880 24,624 15,506 — 589 16,095 Noninterest expenses 117,288 19,774 21,334 158,396 109,265 16,681 (r) 13,771 139,717 Provision for loan losses 6,097 — 804 6,901 7,675 — 187 7,862 Total external customer expenses 147,129 19,774 23,018 189,921 132,446 16,681 14,547 163,674 Inter-segment expenses: Interest expense 6,735 4,843 1,937 13,515 5,245 1,973 1,525 8,743 Noninterest expenses 724 1,944 3,847 6,515 708 2,186 4,025 6,919 Total inter-segment expenses 7,459 6,787 5,784 20,030 5,953 4,159 5,550 15,662 Total expenses 154,588 26,561 28,802 209,951 138,399 20,840 20,097 179,336 Income before taxes $ 73,971 $ 5,453 $ 11,034 $ 90,458 $ 54,154 $ 6,229 $ 9,591 $ 69,974 Income tax provision 30,382 24,004 Consolidated net income $ 60,076 $ 45,970 Capital expenditures $ 6,611 $ 103 $ 480 $ 7,194 $ 14,346 $ 672 $ 19 $ 15,037 (r) Noninterest income and noninterest expense for the period ended September 30, 2016 have been restated to correct an immaterial error related to revenue earned for cash servicing fees. See Note 1 - Basis of Presentation for further information. The following table shows significant components of segment net assets as of September 30, 2017 and December 31, 2016 : September 30, 2017 December 31, 2016 (Dollars in thousands) WSFS Bank Cash ® Wealth Total WSFS Bank Cash ® Wealth Management Total Statement of Financial Condition Cash and cash equivalents $ 94,169 $ 631,883 $ 7,313 $ 733,365 $ 100,893 $ 717,643 $ 3,387 $ 821,923 Goodwill 145,808 — 20,199 166,007 147,396 — 20,143 167,539 Other segment assets 5,757,941 2,983 215,048 5,975,972 5,545,611 3,533 226,664 5,775,808 Total segment assets $ 5,997,918 $ 634,866 $ 242,560 $ 6,875,344 $ 5,793,900 $ 721,176 $ 250,194 $ 6,765,270

Change in Accumulated Other C38

Change in Accumulated Other Comprehensive (Loss) Income (Tables)	9 Months Ended
	Sep. 30, 2017
Equity [Abstract]
Components of Accumulated Other Comprehensive (Loss) Income	Changes to accumulated other comprehensive (loss) income 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 securities held to maturity Net change in defined benefit plan Net change in fair value of derivative used for cash flow hedge Total 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 (loss) income (475 ) (99 ) (22 ) — (596 ) Net current-period other comprehensive income (loss) 814 (99 ) (22 ) 42 735 Balance, September 30, 2017 $ (3,528 ) $ 1,095 $ 890 $ (1,580 ) $ (3,123 ) Balance, June 30, 2016 $ 12,841 $ 1,592 $ 1,244 $ — $ 15,677 Other comprehensive (loss) income before reclassifications (1,112 ) — — 61 (1,051 ) Less: Amounts reclassified from accumulated other comprehensive income (645 ) (102 ) (20 ) — (767 ) Net current-period other comprehensive (loss) income (1,757 ) (102 ) (20 ) 61 (1,818 ) Balance, September 30, 2016 $ 11,084 $ 1,490 $ 1,224 $ 61 $ 13,859 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 (loss) 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 ) Balance, December 31, 2015 $ (1,887 ) $ 1,795 $ 788 $ — $ 696 Other comprehensive income before reclassifications 14,143 — — 61 14,204 Less: Amounts reclassified from accumulated other comprehensive (loss) income (1,172 ) (305 ) 436 — (1,041 ) Net current-period other comprehensive income (loss) 12,971 (305 ) 436 61 13,163 Balance, September 30, 2016 $ 11,084 $ 1,490 $ 1,224 $ 61 $ 13,859
Components of Other Comprehensive Income (Loss)	The Consolidated Statements of Income were impacted by components of other comprehensive income (loss) as shown in the table below: (Dollars in thousands) Three Months Ended September 30, Affected line item in Consolidated Statements of Income 2017 2016 Securities available for sale: Realized gains on securities transactions $ (736 ) $ (1,040 ) Security gains, net Income taxes 261 395 Income tax provision Net of tax $ (475 ) $ (645 ) 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 $ (159 ) $ (162 ) Interest income on investment securities Income taxes 60 60 Income tax provision Net of tax $ (99 ) $ (102 ) Amortization of Defined Benefit Pension items: Prior service (credits) costs $ (19 ) $ (18 ) Actuarial (gains) losses (18 ) (16 ) Total before tax $ (37 ) $ (34 ) Salaries, benefits and other compensation Income taxes 15 14 Income tax provision Net of tax (22 ) (20 ) Total reclassifications $ (596 ) $ (767 ) (Dollars in thousands) Nine Months Ended September 30, Affected line item in Consolidated Statements of Income 2017 2016 Securities available for sale: Realized gains on securities transactions $ (1,764 ) $ (1,890 ) Security gains, net Income taxes 628 718 Income tax provision Net of tax $ (1,136 ) $ (1,172 ) 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 $ (478 ) $ (492 ) Interest income on investment securities Income taxes 181 187 Income tax provision Net of tax $ (297 ) $ (305 ) Amortization of Defined Benefit Pension items: Prior service (credits) costs $ (57 ) $ (44 ) Actuarial (gains) losses (52 ) 746 Total before tax $ (109 ) $ 702 Salaries, benefits and other compensation Income taxes 42 (266 ) Income tax provision Net of tax (67 ) 436 Total reclassifications $ (1,500 ) $ (1,041 )

Basis of Presentation - Additio

Basis of Presentation - Additional Information (Detail)	Sep. 01, 2017USD ($)	Jun. 13, 2016USD ($)	Sep. 30, 2017SubsidiaryOffice	Dec. 31, 2012USD ($)
Basis Of Presentation [Line Items]
Number of unconsolidated affiliate			1
Number of banking offices			77
Write-off of unamortized debt issuance costs | $	$ 700,000
Senior Unsecured Fixed - to - Floating Rate Notes
Basis Of Presentation [Line Items]
Senior unsecured fixed-to-floating rate notes, issued amount | $		$ 100,000,000
Interest rate on unsecured debt		4.50%
Senior unsecured notes, redemption price percentage of principal		100.00%
Senior Unsecured Fixed - to - Floating Rate Notes | London Interbank Offered Rate (LIBOR)
Basis Of Presentation [Line Items]
Senior unsecured notes, variable rate added to LIBOR		3.30%
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
Senior notes due 2019
Basis Of Presentation [Line Items]
Senior unsecured fixed-to-floating rate notes, issued amount | $				$ 55,000,000
Interest rate on unsecured debt				6.25%

Basis of Presentation - Correct

Basis of Presentation - Correction of Prior Period Balances (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Noninterest income - Other income	$ 6,066	$ 4,862	$ 17,312	$ 14,011
Noninterest expense - Other operating expense	$ 10,644	8,811	29,275	$ 24,552
Immaterial error, cash servicing fees
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Noninterest income - Other income		4,862	14,011
Noninterest expense - Other operating expense		8,811	24,552
Immaterial error, cash servicing fees | As originally reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Noninterest income - Other income		4,125	12,017
Noninterest expense - Other operating expense		8,074	22,558
Immaterial error, cash servicing fees | Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Noninterest income - Other income		737	1,994
Noninterest expense - Other operating expense		$ 737	$ 1,994

Business Combinations - Summary

Business Combinations - Summary of Consideration Paid and Fair Value of Identifiable Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands	Aug. 12, 2016	Sep. 30, 2017	Dec. 31, 2016
Liabilities assumed:
Goodwill resulting from acquisition of Penn Liberty		$ 166,007	$ 167,539
Penn Liberty Financial Corporation
Liabilities assumed:
Goodwill resulting from acquisition of Penn Liberty		$ 67,226	$ 68,814
Pennsylvania | Penn Liberty Financial Corporation
Consideration Transferred:
Common shares issued (1,806,748)	$ 68,352
Common shares issued (in shares)	1,806,748
Cash paid to Penn Liberty stock and option holders	$ 40,549
Value of consideration	108,901
Assets acquired:
Cash and due from banks	102,301
Investment securities	627
Loans	483,203
Premises and equipment	6,817
Deferred income taxes	6,542
Bank owned life insurance	8,666
Core deposit intangible	2,882
Other real estate owned	996
Other assets	12,085
Total assets	624,119
Liabilities assumed:
Deposits	568,706
Other borrowings	10,000
Other liabilities	3,738
Total liabilities	582,444
Net assets acquired:	41,675
Goodwill resulting from acquisition of Penn Liberty	$ 67,226

Business Combinations - Summa42

Business Combinations - Summary of Changes to Goodwill (Detail) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017
Goodwill [Roll Forward]
Goodwill beginning balance		$ 167,539,000
Goodwill ending balance	$ 166,007,000	166,007,000
Penn Liberty Financial Corporation
Goodwill [Roll Forward]
Goodwill beginning balance		68,814,000
Effects of adjustments to	0
Goodwill ending balance	$ 67,226,000	67,226,000
Deferred income taxes | Penn Liberty Financial Corporation
Goodwill [Roll Forward]
Effects of adjustments to		880,000
Loans | Penn Liberty Financial Corporation
Goodwill [Roll Forward]
Effects of adjustments to		279,000
Other assets | Penn Liberty Financial Corporation
Goodwill [Roll Forward]
Effects of adjustments to		(1,440,000)
Other liabilities | Penn Liberty Financial Corporation
Goodwill [Roll Forward]
Effects of adjustments to		$ (1,307,000)

Business Combinations - Additio

Business Combinations - Additional Information (Details)	3 Months Ended
	Sep. 30, 2017USD ($)
Penn Liberty Financial Corporation
Business Acquisition [Line Items]
Goodwill, purchase accounting adjustments	$ 0

Earnings Per Share - Computatio

Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Numerator:
Net Income	$ 20,569	$ 12,722	$ 60,076	$ 45,970
Denominator:
Weighted average basic shares (in shares)	31,420	30,520	31,424	29,914
Dilutive potential common shares (in shares)	848	797	856	747
Weighted average fully diluted shares (in shares)	32,268	31,317	32,280	30,661
Earnings per share:
Basic (in dollars per share)	$ 0.65	$ 0.42	$ 1.91	$ 1.54
Diluted (in dollars per share)	$ 0.64	$ 0.41	$ 1.86	$ 1.50
Outstanding common stock equivalents having no dilutive effect (in shares)	0	1	5	10

Investment Securities - Additio

Investment Securities - Additional Information (Detail)	9 Months Ended		12 Months Ended
	Sep. 30, 2017USD ($)secuirty	Sep. 30, 2016USD ($)	Dec. 31, 2016USD ($)
Schedule of Available-for-sale Securities [Line Items]
Trading securities	$ 0
Available-for-sale securities, amortized cost basis	816,114,000		$ 807,761,000
Securities pledged as collateral	737,300,000		562,500,000
Proceeds from sale of investment securities	415,500,000	$ 155,800,000
Gains from sale of Available-for-sale securities	1,900,000	1,900,000
Losses from sale of Available-for-sale securities (less than during the current quarter end)	100,000	$ 0
Unamortized premiums	14,900,000		18,000,000
Unaccreted discounts	1,100,000		400,000
Owned investment securities	511,300,000
Total unrealized losses on securities	$ 8,800,000
Number of securities, below investment grade | secuirty	1
Available-for-sale securities, below investment grade, fair value	$ 800,000
Weighted average duration of MBS portfolio	5 years 1 month 6 days
Mortgage-Backed Securities (MBS)
Schedule of Available-for-sale Securities [Line Items]
OTTI on evaluation of securities	$ 0
Mutual Fund
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, amortized cost basis	600,000		600,000
State and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities transfers to held to maturity unrealized gains	$ 1,800,000		$ 2,200,000

Investment Securities - Schedul

Investment Securities - Schedule of Amortized Cost and Estimated Fair Value of Available-for-Sale and Held-to-Maturity Investment Securities (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Available-for-Sale Securities:
Amortized Cost	$ 816,114	$ 807,761
Gross Unrealized Gain	3,006	1,963
Gross Unrealized Loss	8,687	15,181
Investment securities available for sale	810,433	794,543
Held-to-Maturity Securities
Amortized Cost	161,721	164,346
Fair Value	163,397	163,232
CMO
Available-for-Sale Securities:
Amortized Cost	269,267	264,607
Gross Unrealized Gain	895	566
Gross Unrealized Loss	2,354	3,957
Investment securities available for sale	267,808	261,216
FNMA MBS
Available-for-Sale Securities:
Amortized Cost	434,920	414,218
Gross Unrealized Gain	1,545	950
Gross Unrealized Loss	5,223	9,404
Investment securities available for sale	431,242	405,764
FHLMC MBS
Available-for-Sale Securities:
Amortized Cost	85,564	64,709
Gross Unrealized Gain	277	135
Gross Unrealized Loss	779	1,330
Investment securities available for sale	85,062	63,514
GNMA MBS
Available-for-Sale Securities:
Amortized Cost	25,723	28,540
Gross Unrealized Gain	289	303
Gross Unrealized Loss	315	427
Investment securities available for sale	25,697	28,416
Other investments
Available-for-Sale Securities:
Amortized Cost	640	626
Gross Unrealized Gain	0	0
Gross Unrealized Loss	16	3
Investment securities available for sale	624	623
GSE
Available-for-Sale Securities:
Amortized Cost		35,061
Gross Unrealized Gain		9
Gross Unrealized Loss		60
Investment securities available for sale		35,010
State and political subdivisions
Held-to-Maturity Securities
Amortized Cost	161,721	164,346
Gross Unrealized Gain	1,796	271
Gross Unrealized Loss	120	1,385
Fair Value	$ 163,397	$ 163,232

Investment Securities - Sched47

Investment Securities - Schedule of Maturities of Investment Securities Available-for-Sale and Held-to-Maturity (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Available-for-sale securities, amortized cost within one year	$ 0	$ 16,009
Available-for-sale securities, amortized cost after one year but within five years	4,007	19,052
Available-for-sale securities, amortized cost after five years but within ten years	201,919	276,635
Available-for-sale securities, amortized cost after ten years	609,548	495,439
Available-for-sale securities, amortized cost total	815,474	807,135
Available-for-sale securities, fair value within one year	0	16,017
Available-for-sale securities, fair value after one year but within five years	4,002	18,992
Available-for-sale securities, fair value after five years but within ten years	198,334	270,300
Available-for-sale securities, fair value after ten years	607,473	488,611
Available-for-sale securities, fair value total	809,809	793,920
Held-to-maturity securities, amortized cost within one year	328	0
Held-to-maturity securities, amortized cost after one year but within five years	5,437	6,168
Held-to-maturity securities, amortized cost after five years but within ten years	15,672	8,882
Held-to-maturity securities, amortized cost after ten years	140,284	149,296
Amortized Cost	161,721	164,346
Held-to-maturity securities, fair value within one year	326	0
Held-to-maturity securities, fair value after one year but within five years	5,491	6,162
Held-to-maturity securities, after five years but within ten years	15,838	8,870
Held-to-maturity securities, after ten years	141,742	148,200
Held-to-maturity securities, fair value total	$ 163,397	$ 163,232

Investment Securities - Sched48

Investment Securities - Schedule of Investment Securities' Gross Unrealized Losses and Fair Value by Investment Category (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Less than 12 months, Fair Value	$ 353,265	$ 550,952
Available-for-sale securities, Less than 12 months, Unrealized Loss	4,067	15,091
Available-for-sale securities, 12 months or longer, Fair Value	137,779	4,654
Available-for-sale securities, 12 months or longer, Unrealized Loss	4,620	90
Available-for-sale securities, Total, Fair Value	491,044	555,606
Available-for-sale securities, Total, Unrealized Loss	8,687	15,181
Held-to-maturity, Less than 12 months, Fair Value	13,571	112,642
Held-to-maturity, Less than 12 months, Unrealized Loss	48	1,374
Held-to-maturity, 12 months or longer, Fair Value	6,700	695
Held-to-maturity, 12 months or longer, Unrealized Loss	72	11
Held-to-maturity, Total, Fair Value	20,271	113,337
Held-to-maturity, Total, Unrealized Loss	120	1,385
CMO
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Less than 12 months, Fair Value	114,939	160,572
Available-for-sale securities, Less than 12 months, Unrealized Loss	1,188	3,867
Available-for-sale securities, 12 months or longer, Fair Value	43,775	4,654
Available-for-sale securities, 12 months or longer, Unrealized Loss	1,166	90
Available-for-sale securities, Total, Fair Value	158,714	165,226
Available-for-sale securities, Total, Unrealized Loss	2,354	3,957
FNMA MBS
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Less than 12 months, Fair Value	188,153	50,878
Available-for-sale securities, Less than 12 months, Unrealized Loss	2,299	1,330
Available-for-sale securities, 12 months or longer, Fair Value	74,801	0
Available-for-sale securities, 12 months or longer, Unrealized Loss	2,924	0
Available-for-sale securities, Total, Fair Value	262,954	50,878
Available-for-sale securities, Total, Unrealized Loss	5,223	1,330
FHLMC MBS
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Less than 12 months, Fair Value	45,317	300,403
Available-for-sale securities, Less than 12 months, Unrealized Loss	497	9,404
Available-for-sale securities, 12 months or longer, Fair Value	7,892	0
Available-for-sale securities, 12 months or longer, Unrealized Loss	282	0
Available-for-sale securities, Total, Fair Value	53,209	300,403
Available-for-sale securities, Total, Unrealized Loss	779	9,404
GNMA MBS
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Less than 12 months, Fair Value	4,856	16,480
Available-for-sale securities, Less than 12 months, Unrealized Loss	83	427
Available-for-sale securities, 12 months or longer, Fair Value	10,687	0
Available-for-sale securities, 12 months or longer, Unrealized Loss	232	0
Available-for-sale securities, Total, Fair Value	15,543	16,480
Available-for-sale securities, Total, Unrealized Loss	315	427
Other investments
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Less than 12 months, Fair Value	0	623
Available-for-sale securities, Less than 12 months, Unrealized Loss	0	3
Available-for-sale securities, 12 months or longer, Fair Value	624	0
Available-for-sale securities, 12 months or longer, Unrealized Loss	16	0
Available-for-sale securities, Total, Fair Value	624	623
Available-for-sale securities, Total, Unrealized Loss	16	3
GSE
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Less than 12 months, Fair Value		21,996
Available-for-sale securities, Less than 12 months, Unrealized Loss		60
Available-for-sale securities, 12 months or longer, Fair Value		0
Available-for-sale securities, 12 months or longer, Unrealized Loss		0
Available-for-sale securities, Total, Fair Value		21,996
Available-for-sale securities, Total, Unrealized Loss		60
State and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Held-to-maturity, Less than 12 months, Fair Value	13,571	112,642
Held-to-maturity, Less than 12 months, Unrealized Loss	48	1,374
Held-to-maturity, 12 months or longer, Fair Value	6,700	695
Held-to-maturity, 12 months or longer, Unrealized Loss	72	11
Held-to-maturity, Total, Fair Value	20,271	113,337
Held-to-maturity, Total, Unrealized Loss	$ 120	$ 1,385

Loans - Summary of Loan Portfol

Loans - Summary of Loan Portfolio by Category (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 4,696,231		$ 4,469,216	$ 4,394,110
Deferred fees, net	7,244		7,673
Allowance for loan losses	40,201	$ 40,005	39,751	39,028	$ 37,746	$ 37,089
Net loans	4,670,216		4,444,375
Reverse mortgage, fair value	21,400		22,600	23,100
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	520,276		450,029	438,158
Allowance for loan losses	7,512	7,148	6,012	5,999	5,826	5,964
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,388,094		1,287,731
Owner-occupied commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,096,753		1,078,162	1,057,645
Allowance for loan losses	5,732	5,816	6,588	6,945	6,723	6,670
Commercial mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,157,074		1,163,554	1,153,903
Allowance for loan losses	5,919	7,335	8,915	9,372	8,135	6,487
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	293,317		222,712	208,976
Allowance for loan losses	3,917	$ 3,432	2,838	$ 2,818	$ 3,308	$ 3,521
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	262,147		289,611
Financing Receivable Portfolio Segment, Including Reverse Mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 4,717,661		$ 4,491,799

Loans - Schedule of Outstanding

Loans - Schedule of Outstanding Principal Balance and Carrying Amounts for Acquired Credit-Impaired Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Receivables [Abstract]
Outstanding principal balance	$ 30,465	$ 41,574
Carrying amount	24,039	33,104
Allowance for loan losses	$ 542	$ 510

Loans - Summary of Changes in A

Loans - Summary of Changes in Accretable Yield on Acquired Credit Impaired Loans (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2017USD ($)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance at beginning of period	$ 5,150
Accretion	(2,158)
Reclassification from nonaccretable difference	1,246
Additions/adjustments	(1,089)
Disposals	(345)
Balance at the end of the period	$ 2,804

Allowance for Loan Losses and52

Allowance for Loan Losses and Credit Quality Information - Additional Information (Detail)	3 Months Ended		9 Months Ended						12 Months Ended
	Sep. 30, 2017USD ($)	Sep. 30, 2016USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2017USD ($)SecurityLoan	Sep. 30, 2017USD ($)loan	Sep. 30, 2016USD ($)	Dec. 31, 2016USD ($)SecurityLoan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net charge-offs					$ 6,500,000			$ 5,900,000
Percentage of average loans annualized, charged-offs				0.19%				0.20%
Reverse mortgage, fair value	$ 21,400,000	$ 23,100,000	$ 21,400,000	$ 21,400,000	21,400,000	$ 21,400,000	$ 21,400,000	$ 23,100,000	$ 22,600,000
Performing TDRs					14,905,000			14,200,000	14,336,000
Acquired nonimpaired loans	596,466,000	766,932,000	596,466,000	596,466,000	596,466,000	596,466,000	596,466,000	766,932,000	724,100,000
Acquired impaired loans	7,300,000		7,300,000	7,300,000	7,300,000	7,300,000	7,300,000		12,800,000
Contractual principal balance	8,300,000		8,300,000	8,300,000	8,300,000	8,300,000	8,300,000		15,000,000
Acquired impaired loans					24,582,000			38,103,000	33,614,000
Interest income on impaired loans	300,000	500,000			1,000,000			800,000
Accrued troubled debt restructured loans	14,600,000		14,600,000	14,600,000	14,600,000	14,600,000	14,600,000		12,400,000
Troubled debt restructuring related reserves	1,100,000		$ 1,100,000	1,100,000	1,100,000	$ 1,100,000	$ 1,100,000		1,300,000
Usual sustained repayment performance period			6 months
TRD defaulted						14	4
Subsequent default, loan amount					3,700,000
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired nonimpaired loans	77,154,000	103,537,000	$ 77,154,000	77,154,000	77,154,000	$ 77,154,000	$ 77,154,000	103,537,000
Acquired impaired loans					788,000			899,000	$ 860,000
Number of residential loans in the process of foreclosure | SecurityLoan						32			29
Total loans outstanding, residential loans					3,300,000				$ 3,700,000
TRD defaulted | SecurityLoan						3
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired nonimpaired loans	120,987,000	$ 175,570,000	$ 120,987,000	120,987,000	120,987,000	$ 120,987,000	120,987,000	175,570,000
Acquired impaired loans					5,235,000			9,691,000	$ 6,183,000
Number of residential loans in the process of foreclosure | SecurityLoan						3			7
Total loans outstanding, residential loans					200,000				$ 3,600,000
TRD defaulted | SecurityLoan						0
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 in allowance for loan losses (less than)					0			80,000
Troubled debt restructurings charged off (less than)					0			$ 100,000
Total Residential and Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired nonimpaired loans	117,300,000		$ 117,300,000	117,300,000	117,300,000	$ 117,300,000	117,300,000		150,500,000
Impairment loans, charge off period			90 days
Total Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired nonimpaired loans	$ 479,200,000		$ 479,200,000	$ 479,200,000	$ 479,200,000	$ 479,200,000	$ 479,200,000		$ 573,500,000

Allowance for Loan Losses and53

Allowance for Loan Losses and Credit Quality Information - Schedule of Allowance for Loan Losses and Loan Balances (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Allowance for loan losses
Beginning balance	$ 40,005	$ 37,746	$ 39,751	$ 37,089	$ 37,089
Charge-offs	(3,752)	(5,744)	(8,849)	(8,376)
Recoveries	1,052	1,198	2,398	2,453
Provision (credit)	2,823	5,638	6,280	7,592
Provision for acquired loans	73	190	621	270
Ending balance	40,201	39,028	40,201	39,028	39,751
Loans individually evaluated for impairment	2,407	3,361	2,407	3,361
Loans collectively evaluated for impairment	37,252	35,393	37,252	35,393
Acquired loans evaluated for impairment			542	274
Ending balance	40,201	39,028	40,201	39,028
Loans individually evaluated for impairment	48,511	37,354	48,511	37,354
Loans collectively evaluated for impairment	4,026,672	3,551,721	4,026,672	3,551,721
Acquired nonimpaired loans	596,466	766,932	596,466	766,932	724,100
Acquired impaired loans			24,582	38,103	33,614
Ending balance	4,696,231	4,394,110	4,696,231	4,394,110	4,469,216
Owner-occupied commercial
Allowance for loan losses
Beginning balance	5,816	6,723	6,588	6,670	6,670
Charge-offs	(104)	(1,415)	(296)	(1,556)
Recoveries	12	15	120	66
Provision (credit)	(96)	1,437	(802)	1,564
Provision for acquired loans	104	185	122	201
Ending balance	5,732	6,945	5,732	6,945	6,588
Loans individually evaluated for impairment	0	0	0	0
Loans collectively evaluated for impairment	5,699	6,923	5,699	6,923
Acquired loans evaluated for impairment			33	22
Ending balance	5,732	6,945	5,732	6,945
Loans individually evaluated for impairment	3,346	2,510	3,346	2,510
Loans collectively evaluated for impairment	941,296	869,051	941,296	869,051
Acquired nonimpaired loans	144,710	175,411	144,710	175,411
Acquired impaired loans			7,401	10,673	12,122
Ending balance	1,096,753	1,057,645	1,096,753	1,057,645	1,078,162
Commercial mortgages
Allowance for loan losses
Beginning balance	7,335	8,135	8,915	6,487	6,487
Charge-offs	(1,196)	(1)	(1,702)	(79)
Recoveries	16	197	69	310
Provision (credit)	(231)	1,089	(1,602)	2,650
Provision for acquired loans	(5)	(48)	239	4
Ending balance	5,919	9,372	5,919	9,372	8,915
Loans individually evaluated for impairment	131	1,264	131	1,264
Loans collectively evaluated for impairment	5,638	7,982	5,638	7,982
Acquired loans evaluated for impairment			150	126
Ending balance	5,919	9,372	5,919	9,372
Loans individually evaluated for impairment	9,012	7,165	9,012	7,165
Loans collectively evaluated for impairment	943,699	904,328	943,699	904,328
Acquired nonimpaired loans	194,394	229,530	194,394	229,530
Acquired impaired loans			9,969	12,880	10,386
Ending balance	1,157,074	1,153,903	1,157,074	1,153,903	1,163,554
Construction
Allowance for loan losses
Beginning balance	3,432	3,308	2,838	3,521	3,521
Charge-offs	(215)	(30)	(346)	(59)
Recoveries	301	440	305	486
Provision (credit)	427	(824)	1,056	(1,104)
Provision for acquired loans	(28)	(76)	64	(26)
Ending balance	3,917	2,818	3,917	2,818	2,838
Loans individually evaluated for impairment	0	215	0	215
Loans collectively evaluated for impairment	3,881	2,549	3,881	2,549
Acquired loans evaluated for impairment			36	54
Ending balance	3,917	2,818	3,917	2,818
Loans individually evaluated for impairment	1,839	1,419	1,839	1,419
Loans collectively evaluated for impairment	271,447	182,338	271,447	182,338
Acquired nonimpaired loans	19,085	21,627	19,085	21,627
Acquired impaired loans			946	3,592	3,694
Ending balance	293,317	208,976	293,317	208,976	222,712
Complexity Risk
Allowance for loan losses
Beginning balance		0		1,010	1,010
Charge-offs		0		0
Recoveries		0		0
Provision (credit)		0		(1,010)
Provision for acquired loans		0		0
Ending balance		0		0
Loans individually evaluated for impairment		0		0
Loans collectively evaluated for impairment		0		0
Acquired loans evaluated for impairment				0
Ending balance		0		0
Loans individually evaluated for impairment		0		0
Loans collectively evaluated for impairment		0		0
Acquired nonimpaired loans		0		0
Acquired impaired loans				0
Ending balance		0		0
Commercial
Allowance for loan losses
Beginning balance	14,224	11,402	13,339	11,156	11,156
Charge-offs	(1,603)	(3,737)	(3,787)	(4,643)
Recoveries	417	223	820	557
Provision (credit)	2,128	3,714	4,597	4,551
Provision for acquired loans	(7)	117	190	98
Ending balance	15,159	11,719	15,159	11,719	13,339
Loans individually evaluated for impairment	1,220	692	1,220	692
Loans collectively evaluated for impairment	13,646	10,974	13,646	10,974
Acquired loans evaluated for impairment			293	53
Ending balance	15,159	11,719	15,159	11,719
Loans individually evaluated for impairment	12,845	4,198	12,845	4,198
Loans collectively evaluated for impairment	1,249,027	1,077,258	1,249,027	1,077,258
Acquired nonimpaired loans	120,987	175,570	120,987	175,570
Acquired impaired loans			5,235	9,691	6,183
Ending balance	1,388,094	1,266,717	1,388,094	1,266,717	1,287,731
Residential
Allowance for loan losses
Beginning balance	2,050	2,352	2,059	2,281	2,281
Charge-offs	(59)	(43)	(112)	(72)
Recoveries	11	33	141	112
Provision (credit)	(49)	(179)	(146)	(177)
Provision for acquired loans	9	12	20	31
Ending balance	1,962	2,175	1,962	2,175	2,059
Loans individually evaluated for impairment	858	989	858	989
Loans collectively evaluated for impairment	1,078	1,167	1,078	1,167
Acquired loans evaluated for impairment			26	19
Ending balance	1,962	2,175	1,962	2,175
Loans individually evaluated for impairment	14,060	13,957	14,060	13,957
Loans collectively evaluated for impairment	148,715	150,318	148,715	150,318
Acquired nonimpaired loans	77,154	103,537	77,154	103,537
Acquired impaired loans			788	899	860
Ending balance	240,717	268,711	240,717	268,711	267,028
Consumer
Allowance for loan losses
Beginning balance	7,148	5,826	6,012	5,964	5,964
Charge-offs	(575)	(518)	(2,606)	(1,967)
Recoveries	295	290	943	922
Provision (credit)	644	401	3,177	1,118
Provision for acquired loans	0	0	(14)	(38)
Ending balance	7,512	5,999	7,512	5,999	6,012
Loans individually evaluated for impairment	198	201	198	201
Loans collectively evaluated for impairment	7,310	5,798	7,310	5,798
Acquired loans evaluated for impairment			4	0
Ending balance	7,512	5,999	7,512	5,999
Loans individually evaluated for impairment	7,409	8,105	7,409	8,105
Loans collectively evaluated for impairment	472,488	368,428	472,488	368,428
Acquired nonimpaired loans	40,136	61,257	40,136	61,257
Acquired impaired loans			243	368	369
Ending balance	$ 520,276	$ 438,158	$ 520,276	$ 438,158	$ 450,029

Allowance for Loan Losses and54

Allowance for Loan Losses and Credit Quality Information - Summary of Nonaccrual and Past Due Loans (Detail) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	$ 8,934		$ 7,730
Accruing Current Balances	4,629,179		4,404,996
Acquired Impaired Loans	24,582	$ 38,103	33,614
Nonaccrual Loans	33,536		22,876
Total Loans	$ 4,696,231	4,394,110	$ 4,469,216
30-59 Days Past Due and Still Accruing, % of Total Loans	0.13%		0.12%
60-89 Days Past Due and Still Accruing, % of Total Loans	0.03%		0.04%
Greater Than 90 Days Past Due and Still Accruing, % of Total Loans	0.03%		0.01%
Total Past Due And Still Accruing, % of Total Loans	0.19%		0.17%
Accruing Current Balances, % of Total Loans	98.58%		98.57%
Acquired Impaired Loans, % of Total Loans	0.52%		0.75%
Nonaccrual Loans, % of Total Loans	0.71%		0.51%
% of Total Loans	100.00%		100.00%
Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	$ 1,494		$ 1,785
Accruing Current Balances	1,368,660		1,277,748
Acquired Impaired Loans	5,235	9,691	6,183
Nonaccrual Loans	12,705		2,015
Total Loans	1,388,094	1,266,717	1,287,731
Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	2,629		3,967
Accruing Current Balances	232,567		257,234
Acquired Impaired Loans	788	899	860
Nonaccrual Loans	4,733		4,967
Total Loans	240,717	268,711	267,028
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	1,460		1,023
Accruing Current Balances	516,463		444,642
Acquired Impaired Loans	243	368	369
Nonaccrual Loans	2,110		3,995
Total Loans	520,276	438,158	450,029
30–59 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	6,325		5,490
30–59 Days Past Due and Still Accruing | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	673		1,507
30–59 Days Past Due and Still Accruing | Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	1,708		3,176
30–59 Days Past Due and Still Accruing | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	593		392
60–89 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	1,271		1,802
60–89 Days Past Due and Still Accruing | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	136		278
60–89 Days Past Due and Still Accruing | Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	364		638
60–89 Days Past Due and Still Accruing | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	771		346
Greater Than 90 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	1,338		438
Greater Than 90 Days Past Due and Still Accruing | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	685		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	557		153
Greater Than 90 Days Past Due and Still Accruing | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	96		285
Owner-occupied commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	998		656
Accruing Current Balances	1,085,008		1,063,306
Acquired Impaired Loans	7,401	10,673	12,122
Nonaccrual Loans	3,346		2,078
Total Loans	1,096,753	1,057,645	1,078,162
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	998		116
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	0		540
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	1,320		167
Accruing Current Balances	1,136,982		1,143,180
Acquired Impaired Loans	9,969	12,880	10,386
Nonaccrual Loans	8,803		9,821
Total Loans	1,157,074	1,153,903	1,163,554
Commercial mortgages | 30–59 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	1,320		167
Commercial mortgages | 60–89 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	0		0
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	1,033		132
Accruing Current Balances	289,499		218,886
Acquired Impaired Loans	946	3,592	3,694
Nonaccrual Loans	1,839		0
Total Loans	293,317	$ 208,976	222,712
Construction | 30–59 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due And Still Accruing	1,033		132
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 and55

Allowance for Loan Losses and Credit Quality Information - Analysis of Impaired Loans (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ending Loan Balances	$ 55,852	$ 51,600
Loans with No Related Reserve	29,838	21,504
Loans with Related Reserve	26,014	28,400
Related Reserve	2,949	3,405
Contractual Principal Balances	69,513	64,665
Average Loan Balances	57,142	41,084
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ending Loan Balances	14,814	4,250
Loans with No Related Reserve	3,129	1,395
Loans with Related Reserve	11,685	2,855
Related Reserve	1,513	505
Contractual Principal Balances	16,967	5,572
Average Loan Balances	11,981	5,053
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ending Loan Balances	14,621	14,256
Loans with No Related Reserve	8,343	7,122
Loans with Related Reserve	6,278	7,134
Related Reserve	884	934
Contractual Principal Balances	17,517	17,298
Average Loan Balances	14,652	15,083
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ending Loan Balances	7,447	8,021
Loans with No Related Reserve	5,914	6,561
Loans with Related Reserve	1,533	1,460
Related Reserve	202	215
Contractual Principal Balances	9,283	11,978
Average Loan Balances	8,216	7,910
Owner-occupied commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ending Loan Balances	4,669	4,650
Loans with No Related Reserve	3,346	2,078
Loans with Related Reserve	1,323	2,572
Related Reserve	33	15
Contractual Principal Balances	4,984	5,129
Average Loan Balances	5,583	3,339
Commercial mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ending Loan Balances	12,190	15,065
Loans with No Related Reserve	7,267	4,348
Loans with Related Reserve	4,923	10,717
Related Reserve	281	1,433
Contractual Principal Balances	18,385	20,716
Average Loan Balances	12,941	7,323
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ending Loan Balances	2,111	3,662
Loans with No Related Reserve	1,839	0
Loans with Related Reserve	272	3,662
Related Reserve	36	303
Contractual Principal Balances	2,377	3,972
Average Loan Balances	$ 3,769	2,376
Collateral Dependent Impaired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ending Loan Balances		$ 49,904

Allowance for Loan Losses and56

Allowance for Loan Losses and Credit Quality Information - Schedule of Commercial Credit Exposure (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial Loans	100.00%	100.00%
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	$ 1,388,094	$ 1,287,731
Special mention | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	12,474	17,630
Accrual | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	52,237	45,067
Nonaccrual | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	11,485	1,693
Doubtful | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	$ 1,220	$ 322
Total Special Mention and Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial Loans	3.00%	4.00%
Total Special Mention and Substandard | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	$ 77,416	$ 64,712
Acquired impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial Loans	1.00%	1.00%
Acquired impaired | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	$ 5,235	$ 6,183
Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial Loans	96.00%	95.00%
Pass | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	$ 1,305,443	$ 1,216,836
Owner-occupied commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	1,096,753	1,078,162
Owner-occupied commercial | Special mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	2,858	11,419
Owner-occupied commercial | Accrual
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	25,083	19,871
Owner-occupied commercial | Nonaccrual
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	3,346	2,078
Owner-occupied commercial | Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	0	0
Owner-occupied commercial | Total Special Mention and Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	31,287	33,368
Owner-occupied commercial | Acquired impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	7,401	12,122
Owner-occupied commercial | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	1,058,065	1,032,672
Commercial mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	1,157,074	1,163,554
Commercial mortgages | Special mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	0	34,198
Commercial mortgages | Accrual
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	64	239
Commercial mortgages | Nonaccrual
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	8,672	8,574
Commercial mortgages | Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	131	1,247
Commercial mortgages | Total Special Mention and Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	8,867	44,258
Commercial mortgages | Acquired impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	9,969	10,386
Commercial mortgages | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	1,138,238	1,108,910
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	293,317	222,712
Construction | Special mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	3,644	0
Construction | Accrual
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	754	2,193
Construction | Nonaccrual
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	1,839	0
Construction | Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	0	0
Construction | Total Special Mention and Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	6,237	2,193
Construction | Acquired impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	946	3,694
Construction | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	286,134	216,825
Total Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	3,935,238	3,752,159
Total Commercial | Special mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	18,976	63,247
Total Commercial | Accrual
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	78,138	67,370
Total Commercial | Nonaccrual
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	25,342	12,345
Total Commercial | Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	1,351	1,569
Total Commercial | Total Special Mention and Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	123,807	144,531
Total Commercial | Acquired impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	23,551	32,385
Total Commercial | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Commercial Loans	$ 3,787,880	$ 3,575,243

Allowance for Loan Losses and57

Allowance for Loan Losses and Credit Quality Information - Schedule of Residential and Consumer Credit Exposure (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 4,696,231	$ 4,469,216	$ 4,394,110
Total	100.00%	100.00%
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 240,717	$ 267,028	268,711
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	520,276	450,029	$ 438,158
Nonperforming | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	14,060	13,547
Nonperforming | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	7,409	7,863
Performing | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	225,869	252,621
Performing | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 512,624	$ 441,797
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	$ 788	$ 860
Acquired impaired | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	243	369
Total Residential and Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 760,993	$ 717,057
Total	100.00%	100.00%
Total Residential and Consumer | Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 21,469	$ 21,410
Total	3.00%	3.00%
Total Residential and Consumer | Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 738,493	$ 694,418
Total	97.00%	97.00%
Total Residential and Consumer | Acquired impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 1,031	$ 1,229
Total	0.00%	0.00%

Allowance for Loan Losses and58

Allowance for Loan Losses and Credit Quality Information - Schedule of Troubled Debt Restructurings (Detail) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Receivables [Abstract]
Performing TDRs	$ 14,905	$ 14,200	$ 14,336
Nonperforming TDRs	11,114		8,451
Total TDRs	$ 26,019		$ 22,787

Allowance for Loan Losses and59

Allowance for Loan Losses and Credit Quality Information - Schedule of Types of TDR (Detail) - 9 months ended Sep. 30, 2017	SecurityLoan	loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contractual payment reduction and term extension	4
Maturity Date Extension	4
Discharged in bankruptcy	14	4
Other	7
Total	29
Owner-occupied commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contractual payment reduction and term extension	0
Maturity Date Extension	1
Discharged in bankruptcy	0
Other	0
Total	1
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contractual payment reduction and term extension	1
Maturity Date Extension	1
Discharged in bankruptcy	0
Other	0
Total	2
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contractual payment reduction and term extension	0
Maturity Date Extension	2
Discharged in bankruptcy	0
Other	1
Total	3
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contractual payment reduction and term extension	2
Maturity Date Extension	0
Discharged in bankruptcy	3
Other	0
Total	5
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contractual payment reduction and term extension	1
Maturity Date Extension	0
Discharged in bankruptcy	11
Other	6
Total	18

Allowance for Loan Losses and60

Allowance for Loan Losses and Credit Quality Information - Schedule of Loans Identified as Troubled Debt Restructurings During Periods Indicated (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Financing Receivable, Modifications [Line Items]
Total loans identified during the period	$ 1,667	$ 1,075	$ 8,855	$ 3,381
Commercial
Financing Receivable, Modifications [Line Items]
Total loans identified during the period	0	0	781	1,125
Commercial mortgages
Financing Receivable, Modifications [Line Items]
Total loans identified during the period	0	0	0	0
Construction
Financing Receivable, Modifications [Line Items]
Total loans identified during the period	0	0	1,836	0
Residential
Financing Receivable, Modifications [Line Items]
Total loans identified during the period	1,058	797	1,300	1,523
Consumer
Financing Receivable, Modifications [Line Items]
Total loans identified during the period	609	278	1,867	733
Owner-occupied commercial
Financing Receivable, Modifications [Line Items]
Total loans identified during the period	$ 0	$ 0	$ 3,071	$ 0

Goodwill and Intangibles - Sche

Goodwill and Intangibles - Schedule of Allocation of Goodwill to Our Reportable Operating Segments for Purposes of Goodwill Impairment Testing (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Goodwill [Roll Forward]
Goodwill beginning balance	$ 167,539
Remeasurement adjustments	(1,532)	$ (1,496)
Goodwill ending balance	166,007
WSFS Bank
Goodwill [Roll Forward]
Goodwill beginning balance	147,396
Remeasurement adjustments	(1,588)
Goodwill ending balance	145,808
Cash Connect
Goodwill [Roll Forward]
Goodwill beginning balance	0
Remeasurement adjustments	0
Goodwill ending balance	0
Wealth Management
Goodwill [Roll Forward]
Goodwill beginning balance	20,143
Remeasurement adjustments	56
Goodwill ending balance	$ 20,199

Goodwill and Intangibles - Summ

Goodwill and Intangibles - Summary of Other Intangible Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	$ 32,427	$ 33,861
Accumulated Amortization	(9,318)	(10,153)
Total	23,109	23,708
Core deposits
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	10,658	13,128
Accumulated Amortization	(3,997)	(5,630)
Total	$ 6,661	$ 7,498
Amortization Period	10 years	10 years
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	$ 17,560	$ 17,561
Accumulated Amortization	(3,813)	(2,612)
Total	13,747	14,949
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	221	1,006
Accumulated Amortization	(46)	(728)
Total	$ 175	278
Amortization Period	5 years
Loan servicing rights
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	$ 2,056	1,708
Accumulated Amortization	(1,161)	(1,067)
Total	895	641
Favorable lease asset
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	1,932	458
Accumulated Amortization	(301)	(116)
Total	$ 1,631	$ 342
Minimum | Customer relationships
Finite-Lived Intangible Assets [Line Items]
Amortization Period	7 years	7 years
Minimum | Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Amortization Period		6 months
Minimum | Loan servicing rights
Finite-Lived Intangible Assets [Line Items]
Amortization Period	10 years	10 years
Minimum | Favorable lease asset
Finite-Lived Intangible Assets [Line Items]
Amortization Period	10 months	10 months
Maximum | Customer relationships
Finite-Lived Intangible Assets [Line Items]
Amortization Period	15 years	15 years
Maximum | Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Amortization Period		5 years
Maximum | Loan servicing rights
Finite-Lived Intangible Assets [Line Items]
Amortization Period	30 years	30 years
Maximum | Favorable lease asset
Finite-Lived Intangible Assets [Line Items]
Amortization Period	18 years	15 years

Goodwill and Intangibles - Addi

Goodwill and Intangibles - Additional Information (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Finite-Lived Intangible Assets [Line Items]
Amortization expense on other intangible assets	$ 2,352	$ 1,260
Other Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Amortization expense on other intangible assets	$ 2,300

Goodwill and Intangibles - Sc64

Goodwill and Intangibles - Schedule of Estimated Amortization Expense of Intangibles (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Remaining in 2017	$ 757
2,018	2,986
2,019	2,918
2,020	2,722
2,021	2,396
Thereafter	11,330
Total	$ 23,109	$ 23,708

Associate (Employee) Benefit Pl

Associate (Employee) Benefit Plans - Additional Information (Detail)	Mar. 31, 2014	Sep. 30, 2017
Postemployment Benefits [Abstract]
Requisite service period	10 years
Amortization of unrecognized gains losses exceed percentage		10.00%

Associate (Employee) Benefit 66

Associate (Employee) Benefit Plans - Schedule of Net Periodic Benefit Cost Components of Postretirement Benefits (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Business Acquisition [Line Items]
Service cost	$ 11	$ 14	$ 40	$ 43
Interest cost	16	19	54	57
Prior service cost amortization	(19)	(18)	(57)	(44)
Net gain recognition	(18)	(16)	(52)	(47)
Net periodic benefit cost	(10)	$ (1)	(15)	$ 9
Alliance
Business Acquisition [Line Items]
Service cost	10		30
Interest cost	75		225
Expected Return on Plan Assets	(135)		(405)
Prior service cost amortization	0		0
Net gain recognition	0		0
Net periodic benefit cost	$ (50)		$ (150)

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Income Tax Examination [Line Items]
Unrecognized tax benefits	$ 0		$ 0
Amortization method qualified affordable housing project investments, amortization	400,000	$ 400,000	1,200,000	$ 800,000
Tax benefits recorded as income tax expense			300,000
Carrying value of investment in affordable housing credits	14,200,000		14,200,000		$ 15,400,000
Tax Credit
Income Tax Examination [Line Items]
Affordable housing tax credits	$ 1,200,000		$ 1,200,000

Fair Value Disclosures of Fin68

Fair Value Disclosures of Financial Assets and Liabilities - Schedule of Financial Instruments Carried at Fair Value (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment securities available for sale	$ 810,433	$ 794,543
Total assets measured at fair value on a recurring basis	811,771	796,051
Other real estate owned	3,924	3,591
Loans held for sale	19,313	54,782
Impaired loans, net	52,903	46,499
Total assets measured at fair value on a nonrecurring basis	76,140	104,872
Fair Value, Measurements, Recurring
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Other liabilities	2,736	3,380
GSE | Fair Value, Measurements, Recurring
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment securities available for sale		35,010
CMO
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment securities available for sale	267,808	261,216
CMO | Fair Value, Measurements, Recurring
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment securities available for sale	267,808	261,215
FNMA MBS
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment securities available for sale	431,242	405,764
FNMA MBS | Fair Value, Measurements, Recurring
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment securities available for sale	431,242	405,764
FHLMC MBS
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment securities available for sale	85,062	63,514
FHLMC MBS | Fair Value, Measurements, Recurring
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment securities available for sale	85,062	63,515
GNMA MBS
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment securities available for sale	25,697	28,416
GNMA MBS | Fair Value, Measurements, Recurring
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment securities available for sale	25,697	28,416
Other investments | Fair Value, Measurements, Recurring
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment securities available for sale	624	623
Other assets | Fair Value, Measurements, Recurring
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment securities available for sale	1,338	1,508
Quoted Prices in Active Markets for Identical Asset (Level 1)
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total assets measured at fair value on a recurring basis	624	623
Other real estate owned	0	0
Loans held for sale	0	0
Impaired loans, net	0	0
Total assets measured at fair value on a nonrecurring basis	0	0
Quoted Prices in Active Markets for Identical Asset (Level 1) | Fair Value, Measurements, Recurring
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Other liabilities	0	0
Quoted Prices in Active Markets for Identical Asset (Level 1) | GSE | Fair Value, Measurements, Recurring
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment securities available for sale		0
Quoted Prices in Active Markets for Identical Asset (Level 1) | CMO | Fair Value, Measurements, Recurring
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment securities available for sale	0	0
Quoted Prices in Active Markets for Identical Asset (Level 1) | FNMA MBS | Fair Value, Measurements, Recurring
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment securities available for sale	0	0
Quoted Prices in Active Markets for Identical Asset (Level 1) | FHLMC MBS | Fair Value, Measurements, Recurring
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment securities available for sale	0	0
Quoted Prices in Active Markets for Identical Asset (Level 1) | GNMA MBS | Fair Value, Measurements, Recurring
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment securities available for sale	0	0
Quoted Prices in Active Markets for Identical Asset (Level 1) | Other investments | Fair Value, Measurements, Recurring
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment securities available for sale	624	623
Quoted Prices in Active Markets for Identical Asset (Level 1) | Other assets | Fair Value, Measurements, Recurring
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment securities available for sale	0	0
Significant Other Observable Inputs (Level 2)
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total assets measured at fair value on a recurring basis	811,147	795,428
Other real estate owned	0	0
Loans held for sale	19,313	54,782
Impaired loans, net	0	0
Total assets measured at fair value on a nonrecurring basis	19,313	54,782
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Other liabilities	2,736	3,380
Significant Other Observable Inputs (Level 2) | GSE | Fair Value, Measurements, Recurring
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment securities available for sale		35,010
Significant Other Observable Inputs (Level 2) | CMO | Fair Value, Measurements, Recurring
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment securities available for sale	267,808	261,215
Significant Other Observable Inputs (Level 2) | FNMA MBS | Fair Value, Measurements, Recurring
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment securities available for sale	431,242	405,764
Significant Other Observable Inputs (Level 2) | FHLMC MBS | Fair Value, Measurements, Recurring
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment securities available for sale	85,062	63,515
Significant Other Observable Inputs (Level 2) | GNMA MBS | Fair Value, Measurements, Recurring
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment securities available for sale	25,697	28,416
Significant Other Observable Inputs (Level 2) | Other investments | Fair Value, Measurements, Recurring
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment securities available for sale	0	0
Significant Other Observable Inputs (Level 2) | Other assets | Fair Value, Measurements, Recurring
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment securities available for sale	1,338	1,508
Significant Unobservable Inputs (Level 3)
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total assets measured at fair value on a recurring basis	0	0
Other real estate owned	3,924	3,591
Loans held for sale	0	0
Impaired loans, net	52,903	46,499
Total assets measured at fair value on a nonrecurring basis	56,827	50,090
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Other liabilities	0	0
Significant Unobservable Inputs (Level 3) | GSE | Fair Value, Measurements, Recurring
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment securities available for sale		0
Significant Unobservable Inputs (Level 3) | CMO | Fair Value, Measurements, Recurring
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment securities available for sale	0	0
Significant Unobservable Inputs (Level 3) | FNMA MBS | Fair Value, Measurements, Recurring
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment securities available for sale	0	0
Significant Unobservable Inputs (Level 3) | FHLMC MBS | Fair Value, Measurements, Recurring
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment securities available for sale	0	0
Significant Unobservable Inputs (Level 3) | GNMA MBS | Fair Value, Measurements, Recurring
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment securities available for sale	0	0
Significant Unobservable Inputs (Level 3) | Other investments | Fair Value, Measurements, Recurring
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment securities available for sale	0	0
Significant Unobservable Inputs (Level 3) | Other assets | Fair Value, Measurements, Recurring
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment securities available for sale	$ 0	$ 0

Fair Value Disclosures of Fin69

Fair Value Disclosures of Financial Assets and Liabilities - Additional Information (Detail)	Sep. 30, 2017USD ($)secuirty	Dec. 31, 2016USD ($)	Sep. 30, 2017USD ($)secuirty
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	$ 810,433,000	$ 794,543,000	$ 810,433,000
Minimum discount rate on appraisals of collateral securing loan			10.00%
Maximum discount rate on appraisals of collateral securing loan			50.00%
Loan balances	55,852,000	51,600,000	$ 55,852,000
Related reserve	2,949,000	3,405,000	2,949,000
Commitments of lending operations	0	$ 0
Federal Agency MBS | AAA-Rated
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	809,800,000		809,800,000
Visa | Common Class B
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated value of shares	$ 44,100,000		$ 44,100,000
Penn Liberty Financial Corporation | Quoted Prices in Active Markets for Identical Asset (Level 1)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities, security | secuirty	1		1

Fair Value Disclosures of Fin70

Fair Value Disclosures of Financial Assets and Liabilities - Book Value and Estimated Fair Value of Financial Instruments (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financial assets:
Investment securities available for sale	$ 810,433	$ 794,543
Investment securities held to maturity	161,721	164,346
Loans, held for sale	19,313	54,782
Loans, net	4,670,216	4,444,375
Impaired loans, net	52,903	46,499
Stock in FHLB of Pittsburgh	33,277	38,248
Accrued interest receivable	17,789	17,027
Other assets	85,118	84,892
Financial liabilities:
Deposits	5,051,719	4,738,438
Accrued interest payable	3,882	1,151
Quoted Prices in Active Markets for Identical Asset (Level 1)
Financial assets:
Loans, held for sale	0	0
Impaired loans, net	0	0
Significant Other Observable Inputs (Level 2)
Financial assets:
Loans, held for sale	19,313	54,782
Impaired loans, net	0	0
Significant Unobservable Inputs (Level 3)
Financial assets:
Loans, held for sale	0	0
Impaired loans, net	52,903	46,499
Book Value | Quoted Prices in Active Markets for Identical Asset (Level 1)
Financial assets:
Cash and cash equivalents	733,365	821,923
Book Value | Fair Value Inputs Level 1 And Level 2
Financial assets:
Investment securities available for sale	810,433	794,543
Book Value | Significant Other Observable Inputs (Level 2)
Financial assets:
Investment securities held to maturity	161,721	164,346
Loans, held for sale	19,313	54,782
Stock in FHLB of Pittsburgh	33,277	38,248
Accrued interest receivable	17,789	17,027
Financial liabilities:
Deposits	5,051,719	4,738,438
Borrowed funds	1,003,308	1,267,447
Accrued interest payable	3,882	1,151
Other liabilities	2,736	3,380
Book Value | Fair Value Inputs Level 2 And Level 3
Financial assets:
Loans, net	4,617,313	4,397,876
Book Value | Significant Unobservable Inputs (Level 3)
Financial assets:
Impaired loans, net	52,903	46,499
Other assets	19,618	9,189
Financial liabilities:
Standby letters of credit	463	468
Fair Value | Quoted Prices in Active Markets for Identical Asset (Level 1)
Financial assets:
Cash and cash equivalents	733,365	821,923
Fair Value | Fair Value Inputs Level 1 And Level 2
Financial assets:
Investment securities available for sale	810,433	794,543
Fair Value | Significant Other Observable Inputs (Level 2)
Financial assets:
Investment securities held to maturity	163,397	163,232
Loans, held for sale	19,313	54,782
Stock in FHLB of Pittsburgh	33,277	38,248
Accrued interest receivable	17,789	17,027
Financial liabilities:
Deposits	4,681,111	4,423,921
Borrowed funds	999,551	1,264,170
Accrued interest payable	3,882	1,151
Other liabilities	2,736	3,380
Fair Value | Fair Value Inputs Level 2 And Level 3
Financial assets:
Loans, net	4,596,437	4,300,963
Fair Value | Significant Unobservable Inputs (Level 3)
Financial assets:
Impaired loans, net	52,903	46,499
Other assets	49,697	15,787
Financial liabilities:
Standby letters of credit	$ 463	$ 468

Derivative Financial Instrume71

Derivative Financial Instruments - Fair Value of Derivative Instruments (Detail) $ in Thousands	Sep. 30, 2017USD ($)instrument	Dec. 31, 2016USD ($)
Derivative [Line Items]
Notional	$ 557,100	$ 518,800
Designated as Hedging Instrument
Derivative [Line Items]
Count | instrument	3
Notional	$ 75,000
Liability Derivatives (Fair Value)	2,556
Other liabilities | Designated as Hedging Instrument
Derivative [Line Items]
Liability Derivatives (Fair Value)	$ 2,556

Derivative Financial Instrume72

Derivative Financial Instruments - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2017USD ($)instrument	Dec. 31, 2016USD ($)
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	300,000
Interest rate cash flow hedge gain (loss) reclassified to earnings, net	100,000
Notional	557,100,000	$ 518,800,000
Collateral value against obligations	$ 3,400,000
Designated as Hedging Instrument
Derivative [Line Items]
Count | instrument	3
Notional	$ 75,000,000
Accrued Liabilities
Derivative [Line Items]
Termination value of derivatives	$ 2,600,000

Derivative Financial Instrume73

Derivative Financial Instruments - Effect of Derivative Instruments on the Income Statement (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Derivative [Line Items]
Amount of Gain Recognized in OCI on Derivative (Effective Portion)	$ 42	$ 0	$ 192	$ 0
Interest Rate Products
Derivative [Line Items]
Amount of Gain Recognized in OCI on Derivative (Effective Portion)	$ 42	$ 0	$ 192	$ 0

Segment Information - Additiona

Segment Information - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2017Business_LineSegment
Segment Reporting [Abstract]
Number of businesses | Segment	3
Number of business lines | Business_Line	6

Segment Information - Details o

Segment Information - Details of Segment Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Information [Line Items]
Interest income	$ 65,010	$ 55,337	$ 188,170	$ 156,886
Noninterest income	32,441	27,586	92,209	76,762
Total revenue	97,451	82,923	280,379	233,648
Interest expense	8,881	6,316	24,624	16,095
Noninterest expenses	54,163	51,234	158,396	139,717
Provision for loan losses	2,896	5,828	6,901	7,862
Total expenses	65,940	63,378	189,921	163,674
Income before taxes	31,511	19,545	90,458	69,974
Income tax provision	10,942	6,823	30,382	24,004
Net income	20,569	12,722	60,076	45,970
Capital expenditures	2,840	11,159	7,194	15,037
Inter-Segment Eliminations
Segment Reporting Information [Line Items]
Interest income	4,772	3,000	13,515	8,743
Noninterest income	1,971	2,396	6,515	6,919
Total revenue	6,743	5,396	20,030	15,662
Interest expense	4,772	3,000	13,515	8,743
Noninterest expenses	1,971	2,396	6,515	6,919
Total expenses	6,743	5,396	20,030	15,662
External Customer
Segment Reporting Information [Line Items]
Total revenue	104,194	88,319	300,409	249,310
Total expenses	72,683	68,774	209,951	179,336
WSFS Bank
Segment Reporting Information [Line Items]
Interest income	62,748	53,332	181,670	150,862
Noninterest income	12,102	11,957	34,318	31,982
Total revenue	74,850	65,289	215,988	182,844
Interest expense	8,542	6,113	23,744	15,506
Noninterest expenses	39,546	40,991	117,288	109,265
Provision for loan losses	3,065	5,669	6,097	7,675
Total expenses	51,153	52,773	147,129	132,446
Income before taxes	25,470	14,004	73,971	54,154
Capital expenditures	2,688	10,900	6,611	14,346
WSFS Bank | Inter-Segment Eliminations
Segment Reporting Information [Line Items]
Interest income	2,537	1,302	6,780	3,498
Noninterest income	1,721	2,140	5,791	6,211
Total revenue	4,258	3,442	12,571	9,709
Interest expense	2,235	1,698	6,735	5,245
Noninterest expenses	250	256	724	708
Total expenses	2,485	1,954	7,459	5,953
WSFS Bank | External Customer
Segment Reporting Information [Line Items]
Total revenue	79,108	68,731	228,559	192,553
Total expenses	53,638	54,727	154,588	138,399
Cash Connect
Segment Reporting Information [Line Items]
Interest income	0	0	0	0
Noninterest income	11,212	9,369	31,403	26,437
Total revenue	11,212	9,369	31,403	26,437
Interest expense	0	0	0	0
Noninterest expenses	7,048	5,743	19,774	16,681
Provision for loan losses	0	0	0	0
Total expenses	7,048	5,743	19,774	16,681
Income before taxes	1,965	2,321	5,453	6,229
Capital expenditures	35	248	103	672
Cash Connect | Inter-Segment Eliminations
Segment Reporting Information [Line Items]
Interest income	0	0	0	0
Noninterest income	213	229	611	632
Total revenue	213	229	611	632
Interest expense	1,856	790	4,843	1,973
Noninterest expenses	556	744	1,944	2,186
Total expenses	2,412	1,534	6,787	4,159
Cash Connect | External Customer
Segment Reporting Information [Line Items]
Total revenue	11,425	9,598	32,014	27,069
Total expenses	9,460	7,277	26,561	20,840
Wealth Management
Segment Reporting Information [Line Items]
Interest income	2,262	2,005	6,500	6,024
Noninterest income	9,127	6,260	26,488	18,343
Total revenue	11,389	8,265	32,988	24,367
Interest expense	339	203	880	589
Noninterest expenses	7,569	4,500	21,334	13,771
Provision for loan losses	(169)	159	804	187
Total expenses	7,739	4,862	23,018	14,547
Income before taxes	4,076	3,220	11,034	9,591
Capital expenditures	117	11	480	19
Wealth Management | Inter-Segment Eliminations
Segment Reporting Information [Line Items]
Interest income	2,235	1,698	6,735	5,245
Noninterest income	37	27	113	76
Total revenue	2,272	1,725	6,848	5,321
Interest expense	681	512	1,937	1,525
Noninterest expenses	1,165	1,396	3,847	4,025
Total expenses	1,846	1,908	5,784	5,550
Wealth Management | External Customer
Segment Reporting Information [Line Items]
Total revenue	13,661	9,990	39,836	29,688
Total expenses	$ 9,585	$ 6,770	$ 28,802	$ 20,097

Segment Information - Details76

Segment Information - Details of Segment Information- Statement of Financial Condition (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Cash and cash equivalents	$ 733,365	$ 821,923	$ 813,405	$ 561,179
Goodwill	166,007	167,539
Other segment assets	5,975,972	5,775,808
Total assets	6,875,344	6,765,270
WSFS Bank
Segment Reporting Information [Line Items]
Cash and cash equivalents	94,169	100,893
Goodwill	145,808	147,396
Other segment assets	5,757,941	5,545,611
Total assets	5,997,918	5,793,900
Cash Connect
Segment Reporting Information [Line Items]
Cash and cash equivalents	631,883	717,643
Goodwill	0	0
Other segment assets	2,983	3,533
Total assets	634,866	721,176
Wealth Management
Segment Reporting Information [Line Items]
Cash and cash equivalents	7,313	3,387
Goodwill	20,199	20,143
Other segment assets	215,048	226,664
Total assets	$ 242,560	$ 250,194

Indemnifications and Guarante77

Indemnifications and Guarantees - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2017USD ($)loanFinancial_Institution	Sep. 30, 2016USD ($)	Sep. 30, 2017USD ($)TransactionloanFinancial_Institution	Sep. 30, 2016USD ($)	Dec. 31, 2016USD ($)loan
Guarantor Obligations [Line Items]
Provision for losses at the time of sale	$ 2,896,000	$ 5,828,000	$ 6,901,000	$ 7,862,000
Number of unrelated financial institutions | Financial_Institution	3		3
Derivative transaction held for guarantee | loan	134		134		134
Notional	$ 557,100,000		$ 557,100,000		$ 518,800,000
Aggregate fair value of swaps to customers	8,600,000		8,600,000		$ 10,900,000
Reserves for swap guarantees	$ 0		$ 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

Change in Accumulated Other C78

Change in Accumulated Other Comprehensive Income - Components of Accumulated Other Comprehensive (Loss) Income (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance			$ 687,336	$ 580,471
Ending Balance	$ 740,861	$ 692,010	740,861	692,010
Net change in investment securities available for sale
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(4,342)	12,841	(8,194)	(1,887)
Other comprehensive income before reclassifications	1,289	(1,112)	5,802	14,143
Less: Amounts reclassified from accumulated other comprehensive (loss) income	(475)	(645)	(1,136)	(1,172)
Net current-period other comprehensive income (loss)	814	(1,757)	4,666	12,971
Ending Balance	(3,528)	11,084	(3,528)	11,084
Net change in securities held to maturity
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	1,194	1,592	1,392	1,795
Other comprehensive income before reclassifications	0	0	0	0
Less: Amounts reclassified from accumulated other comprehensive (loss) income	(99)	(102)	(297)	(305)
Net current-period other comprehensive income (loss)	(99)	(102)	(297)	(305)
Ending Balance	1,095	1,490	1,095	1,490
Net change in defined benefit plan
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	912	1,244	957	788
Other comprehensive income before reclassifications	0	0	0	0
Less: Amounts reclassified from accumulated other comprehensive (loss) income	(22)	(20)	(67)	436
Net current-period other comprehensive income (loss)	(22)	(20)	(67)	436
Ending Balance	890	1,224	890	1,224
Net change in fair value of derivative used for cash flow hedge
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(1,622)	0	(1,772)	0
Other comprehensive income before reclassifications	42	61	192	61
Less: Amounts reclassified from accumulated other comprehensive (loss) income	0	0	0	0
Net current-period other comprehensive income (loss)	42	61	192	61
Ending Balance	(1,580)	61	(1,580)	61
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(3,858)	15,677	(7,617)	696
Other comprehensive income before reclassifications	1,331	(1,051)	5,994	14,204
Less: Amounts reclassified from accumulated other comprehensive (loss) income	(596)	(767)	(1,500)	(1,041)
Net current-period other comprehensive income (loss)	735	(1,818)	4,494	13,163
Ending Balance	$ (3,123)	$ 13,859	$ (3,123)	$ 13,859

Change in Accumulated Other C79

Change in Accumulated Other Comprehensive Income - Components of Other Comprehensive (Loss) Income (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Realized gains on securities transactions	$ 736	$ 1,040	$ 1,764	$ 1,890
Income taxes	(10,942)	(6,823)	(30,382)	(24,004)
Income before taxes	31,511	19,545	90,458	69,974
Net income	20,569	12,722	60,076	45,970
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income	(596)	(767)	(1,500)	(1,041)
Reclassification out of Accumulated Other Comprehensive Income | Net change in defined benefit plan
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income taxes	15	14	42	(266)
Prior service (credits) costs	(19)	(18)	(57)	(44)
Actuarial (gains) losses	(18)	(16)	(52)	746
Income before taxes	(37)	(34)	(109)	702
Net income	(22)	(20)	(67)	436
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	(736)	(1,040)	(1,764)	(1,890)
Income taxes	261	395	628	718
Net income	(475)	(645)	(1,136)	(1,172)
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]
Income taxes	60	60	181	187
Amortization of net unrealized gains to income during the period	(159)	(162)	(478)	(492)
Net income	$ (99)	$ (102)	$ (297)	$ (305)

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Dec. 31, 2016
Related Party Transaction [Line Items]
Total deposits from related parties	$ 6.6	$ 6.6	$ 3.6
Loans
Related Party Transaction [Line Items]
Related party loan repayment	1.1	1.1	$ 1.3
New Loans And Credit Line Advance To Related Parties
Related Party Transaction [Line Items]
New loans and credit line advance to related parties	0	0.4
Repayments from related party debt (less than in current quarter)	$ 0.1	$ 0.6

Legal and Other Proceedings - A

Legal and Other Proceedings - Additional Information (Detail)	Apr. 07, 2015USD ($)policy	Sep. 30, 2017USD ($)
Subsequent Event [Line Items]
Additions to other significant pending legal or other proceedings		$ 0
Insurance Claims | Universitas Education, LLC | Pending Litigation
Subsequent Event [Line Items]
Loss contingency, number of insurance policies | policy	2
Loss contingency, insurance policy face amount	$ 30,000,000
Damages Sought | Universitas Education, LLC | Pending Litigation
Subsequent Event [Line Items]
Loss contingency, damages sought	27,000,000
Interest And Other Costs | Universitas Education, LLC | Pending Litigation
Subsequent Event [Line Items]
Loss contingency, damages sought	$ 27,000,000