Provident Financial Services (PFS) 10-K 2 Mar 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Feb. 02, 2015	Jun. 29, 2014
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	FALSE
Document Period End Date	31-Dec-14
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Trading Symbol	PFS
Entity Registrant Name	PROVIDENT FINANCIAL SERVICES INC
Entity Central Index Key	1178970
Current Fiscal Year End Date	-19
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		65,313,288
Entity Public Float			$996.20

Consolidated_Statements_of_Fin

Consolidated Statements of Financial Condition (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
ASSETS
Cash and due from banks	$102,484	$100,053
Short-term investments	1,278	1,171
Total cash and cash equivalents	103,762	101,224
Securities available for sale, at fair value	1,074,395	1,157,594
Investment securities held to maturity (fair value of $482,473 and $355,913 at December 31, 2014 and December 31, 2013, respectively)	469,528	357,500
Federal Home Loan Bank Stock	69,789	58,070
Loans	6,085,505	5,194,813
Less allowance for loan losses	61,734	64,664
Net loans	6,023,771	5,130,149
Foreclosed assets, net	5,098	5,486
Banking premises and equipment, net	92,990	66,448
Accrued interest receivable	25,228	22,956
Intangible assets	404,422	356,432
Bank-owned life insurance	177,712	150,511
Other assets	76,682	80,958
Total assets	8,523,377	7,487,328
Deposits:
Demand deposits	3,971,487	3,473,724
Savings deposits	995,347	921,993
Certificates of deposit of $100,000 or more	342,072	270,631
Other time deposits	483,617	536,123
Total deposits	5,792,523	5,202,471
Mortgage escrow deposits	21,649	20,376
Borrowed funds	1,509,851	1,203,879
Other liabilities	55,255	49,849
Total liabilities	7,379,278	6,476,575
Stockholders’ Equity:
Preferred stock, $0.01 par value, 50,000,000 shares authorized, none issued	0	0
Common stock, $0.01 par value, 200,000,000 shares authorized, 83,209,285 shares issued and 64,905,905 shares outstanding at December 31, 2014, and 83,209,285 shares issued and 59,917,649 shares outstanding at December 31, 2013, respectively	832	832
Additional paid-in capital	995,053	1,026,144
Retained earnings	465,276	427,763
Accumulated other comprehensive income	29	-4,851
Treasury stock	-271,779	-390,380
Unallocated common stock held by the Employee Stock Ownership Plan	-45,312	-48,755
Common stock acquired by the Directors’ Deferred Fee Plan	-7,113	-7,205
Deferred compensation—Directors’ Deferred Fee Plan	7,113	7,205
Total stockholders’ equity	1,144,099	1,010,753
Total liabilities and stockholders’ equity	$8,523,377	$7,487,328

Consolidated_Statements_of_Fin1

Consolidated Statements of Financial Condition (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
Statement of Financial Position [Abstract]
Investment securities held to maturity, fair value	$482,473	$355,913
Preferred stock, par value	$0.01	$0.01
Preferred stock, shares authorized	50,000,000	50,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	83,209,285	83,209,285
Common stock, shares outstanding	64,905,905	59,917,649

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Interest income:
Real estate secured loans	$166,700	$152,429	$155,078
Commercial loans	50,115	40,428	40,942
Consumer loans	23,755	23,644	25,208
Securities available for sale and Federal Home Loan Bank stock	26,475	25,250	29,141
Investment securities held to maturity	12,263	10,987	11,808
Deposits, Federal funds sold and other short-term investments	53	39	82
Total interest income	279,361	252,777	262,259
Interest expense:
Deposits	15,332	18,031	25,348
Borrowed funds	25,140	18,736	19,574
Total interest expense	40,472	36,767	44,922
Net interest income	238,889	216,010	217,337
Provision for loan losses	4,650	5,500	16,000
Net interest income after provision for loan losses	234,239	210,510	201,337
Non-interest income:
Fees	31,345	34,045	30,336
Bank-owned life insurance	5,633	6,596	5,276
Other-than-temporary impairment losses on securities	0	-434	0
Portion of loss recognized in other comprehensive income (before taxes)	0	0	0
Net impairment losses on securities recognized in earnings	0	-434	0
Net gain on securities transactions	251	996	4,497
Other income	3,939	2,950	3,504
Total non-interest income	41,168	44,153	43,613
Non-interest expense:
Compensation and employee benefits	92,218	83,000	79,814
Net occupancy expense	23,958	20,560	20,487
Data processing expense	13,667	10,550	10,318
FDIC Insurance	4,662	4,678	5,095
Advertising and promotion expense	5,008	3,890	4,139
Amortization of intangibles	2,757	1,624	2,466
Other operating expenses	27,721	24,461	26,509
Total non-interest expenses	169,991	148,763	148,828
Income before income tax expense	105,416	105,900	96,122
Income tax expense	31,785	35,366	28,855
Net income	$73,631	$70,534	$67,267
Basic earnings per share	$1.22	$1.23	$1.18
Average basic shares outstanding	60,388,398	57,236,909	57,145,868
Diluted earnings per share	$1.22	$1.23	$1.18
Average diluted shares outstanding	60,562,070	57,361,443	57,199,804

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Net income	$73,631	$70,534	$67,267
Unrealized gains and losses on securities available for sale:
Net unrealized gains (losses) arising during the period	10,692	-19,428	1,810
Reclassification adjustment for gains included in net income	-150	-589	-2,660
Total	10,542	-20,017	-850
Other-than-temporary impairment on debt securities available for sale:
Other-than-temporary impairment losses on securities	0	0	0
Reclassification adjustment for impairment losses included in net income	0	257	0
Total	0	257	0
Amortization related to post-retirement obligations	-5,662	7,193	-1,005
Total other comprehensive income (loss)	4,880	-12,567	-1,855
Total comprehensive income	$78,511	$57,967	$65,412

Consolidated_Statement_of_Chan

Consolidated Statement of Changes in Stockholders' Equity (USD $)	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Unallocated ESOP Shares [Member]	Common Stock Acquired By DDFP [Member]	Deferred Compensation DDFP [Member]
In Thousands, unless otherwise specified
Balance at beginning of period at Dec. 31, 2011	$952,477	$832	$1,019,253	$363,011	$9,571	($384,725)	($55,465)	($7,390)	$7,390
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	67,267			67,267
Other comprehensive income, net of tax	-1,855				-1,855
Cash dividends paid	-40,729			-40,729
Distributions from DDFP	0		0					92	-92
Purchases of treasury stock	-9,424					-9,424
Shares issued dividend reinvestment plan	6,090		-1,755			7,845
Option exercises	28		-6			34
Allocation of ESOP shares	2,925		-452				3,377
Allocation of SAP shares	4,015		4,015
Allocation of stock options	452		452
Balance at end of period at Dec. 31, 2012	981,246	832	1,021,507	389,549	7,716	-386,270	-52,088	-7,298	7,298
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	70,534			70,534
Other comprehensive income, net of tax	-12,567				-12,567
Cash dividends paid	-32,320			-32,320
Distributions from DDFP	0							93	-93
Purchases of treasury stock	-5,899					-5,899
Shares issued dividend reinvestment plan	1,244		-57			1,301
Option exercises	354		-134			488
Allocation of ESOP shares	3,318		-15				3,333
Allocation of SAP shares	4,546		4,546
Allocation of stock options	297		297
Balance at end of period at Dec. 31, 2013	1,010,753	832	1,026,144	427,763	-4,851	-390,380	-48,755	-7,205	7,205
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	73,631			73,631
Other comprehensive income, net of tax	4,880				4,880
Cash dividends paid	-36,118			-36,118
Distributions from DDFP	0							92	-92
Purchases of treasury stock	-4,420					-4,420
Treasury shares issued to finance acquisition	83,517		-962			84,479
Shares issued dividend reinvestment plan	1,336		0			1,336
Option exercises	117		-49			166
Allocation of ESOP shares	3,550		107				3,443
Allocation of SAP shares	6,555		6,555
Reclassification of Stock awards			-32,787			32,787
Allocation of Treasury Shares			-4,253			4,253
Allocation of stock options	298		298
Balance at end of period at Dec. 31, 2014	$1,144,099	$832	$995,053	$465,276	$29	($271,779)	($45,312)	($7,113)	$7,113

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities:
Net income	$73,631	$70,534	$67,267
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of intangibles	11,133	8,776	9,327
Provision for loan losses	4,650	5,500	16,000
Deferred tax expense (benefit)	3,666	5,531	-1,134
Increase in cash surrender value of Bank-owned Life Insurance	-5,633	-6,596	-5,276
Net amortization of premiums and discounts on securities	10,461	12,942	16,545
Accretion of net deferred loan fees	-3,364	-3,877	-3,493
Amortization of premiums on purchased loans	694	1,286	1,694
Net increase in loans originated for sale	-12,609	-30,977	-36,723
Proceeds from sales of loans originated for sale	14,018	32,447	38,684
Proceeds from sales of foreclosed assets	6,494	13,686	16,484
ESOP expense	2,654	2,559	2,030
Allocation of stock award shares	6,359	4,869	3,658
Allocation of stock options	298	297	452
Net gain on sale of loans	-1,409	-1,470	-1,961
Net gain on securities available for sale	-251	-996	-4,497
Impairment charge on securities	0	434	0
Net gain on sale of premises and equipment	-5	-42	-633
Net (gain) loss on sale of foreclosed assets	-516	-403	75
Contribution to pension plan	0	0	-4,113
Decrease in accrued interest receivable	787	1,046	651
Increase in other assets	-22,379	-16,325	-9,228
Increase in other liabilities	7,721	173	2,482
Net cash provided by operating activities	96,400	99,394	108,291
Cash flows from investing activities:
Proceeds from maturities, calls and paydowns of investment securities held to maturity	41,057	97,974	77,207
Purchases of investment securities held to maturity	-73,397	-97,964	-89,281
Proceeds from sales of securities	25,033	14,834	106,768
Proceeds from maturities calls and paydowns of securities available for sale	207,531	351,472	488,590
Purchases of securities available for sale	-63,835	-303,334	-495,726
Cash received, net of cash consideration paid for acquisition	68,650	0	0
Purchases of loans	-130,540	-34,766	-73,740
Net increase in loans	-129,240	-259,359	-191,904
Proceeds from sales of premises and equipment	1,903	35	638
Purchases of premises and equipment, net	-16,441	-7,709	-7,658
Net cash used in investing activities	-69,279	-238,817	-185,106
Cash flows from financing activities:
Net (decrease) increase in deposits	-179,886	-226,504	271,674
Increase (decrease) in mortgage escrow deposits	1,250	-666	283
Purchase of treasury stock	-4,420	-5,899	-9,424
Cash dividends paid to stockholders	-36,118	-32,320	-40,729
Shares issued to dividend reinvestment plan	1,336	1,244	6,090
Stock options exercised	117	354	28
Proceeds from long-term borrowings	595,063	301,000	0
Payments on long-term borrowings	-289,757	-79,090	-55,700
Net (decrease) increase in short-term borrowings	-112,168	178,705	-61,216
Net cash (used in) provided by financing activities	-24,583	136,824	111,006
Net increase (decrease) in cash and cash equivalents	2,538	-2,599	34,191
Cash and cash equivalents at beginning of period	101,224	103,823	69,632
Cash and cash equivalents at end of period	103,762	101,224	103,823
Cash paid during the period for:
Interest on deposits and borrowings	39,952	36,727	45,362
Income taxes	25,776	29,119	25,858
Non cash investing activities:
Transfer of loans receivable to foreclosed assets	5,382	6,602	16,253
Investment securities available for sale	157,635	0	0
Loans	631,209	0	0
Bank-owned life insurance	22,319	0	0
Goodwill and other intangible assets, net	50,222	0	-672
Other assets	33,939	0	672
Total non-cash assets acquired	895,324	0	0
Deposits	769,936	0	0
Borrowings	112,835	0	0
Other Liabilities	-2,314	0	0
Total liabilities assumed	880,457	0	0
Common stock issued for acquisitions	$83,517	$0	$0

Summary_of_Significant_Account

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies
	Principles of Consolidation
	The consolidated financial statements include the accounts of Provident Financial Services, Inc. (the “Company”), The Provident Bank (the “Bank”) and their wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. Certain reclassifications have been made in the consolidated financial statements to conform with current year classifications.
	Business
	The Company, through the Bank, provides a full range of banking services to individual and business customers through branch offices in New Jersey and eastern Pennsylvania. The Bank is subject to competition from other financial institutions and to the regulations of certain federal and state agencies, and undergoes periodic examinations by those regulatory authorities.
	Basis of Financial Statement Presentation
	The consolidated financial statements of the Company have been prepared in conformity with U.S. generally accepted accounting principles (“GAAP”). In preparing the consolidated financial statements, management is required to make estimates and assumptions about future events. These estimates and the underlying assumptions affect the reported amounts of assets and liabilities and disclosures about contingent assets and liabilities as of the dates of the consolidated statements of financial condition, and revenues and expenses for the periods then ended. Such estimates are used in connection with the determination of the allowance for loan losses, evaluation of goodwill for impairment, evaluation of other-than-temporary impairment on securities, evaluation of the need for valuation allowances on deferred tax assets, and determination of liabilities related to retirement and other post-retirement benefits, among others. These estimates and assumptions are based on management’s best estimates and judgment. Management evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors, including the current economic environment, which management believes to be reasonable under the circumstances. Such estimates and assumptions are adjusted when facts and circumstances dictate. Illiquid credit markets, volatile securities markets, and declines in the housing market and the economy generally have combined to increase the uncertainty inherent in such estimates and assumptions. As future events and their effects cannot be determined with precision, actual results could differ significantly from these estimates. Changes in estimates resulting from continuing changes in the economic environment will be reflected in the financial statements in future periods.
	Cash and Cash Equivalents
	For purposes of reporting cash flows, cash and cash equivalents include cash and due from banks, Federal funds sold and commercial paper with maturity dates less than 90 days.
	Securities
	Securities include investment securities held to maturity and securities available for sale. Securities that the Company has the positive intent and ability to hold to maturity are classified as “investment securities held to maturity” and reported at amortized cost. Securities to be held for indefinite periods of time and not intended to be held to maturity are classified as “securities available for sale” and are reported at estimated fair value, with unrealized gains and losses excluded from earnings and reported as a separate component of stockholders’ equity, net of deferred taxes.
	The estimated fair values of the Company’s securities are affected by changes in interest rates, credit spreads, and market illiquidity. The Company conducts a periodic review and evaluation of the securities portfolio to determine if any declines in the fair values of securities are other-than-temporary. In accordance with the Financial Accounting Standards Board (“FASB”) Accounting Standard Codification (“ASC”) Topic 320 “Investments-Debt and Equity Securities” on April 1, 2009, to determine if a decline in value is other-than- temporary, the Company evaluates if it has the intent to sell these securities or if it is more likely than not that the Company would be required to sell the securities before the anticipated recovery. If such a decline were deemed other-than-temporary, the Company would measure the total credit-related component of the unrealized loss, and recognize that portion of the loss as a charge to current period earnings. The remaining portion of the unrealized loss would be recognized as an adjustment to accumulated other comprehensive income. In general, as interest rates rise, the market value of fixed-rate securities decreases and as interest rates fall, the market value of fixed-rate securities increases. The market for non-investment grade, privately issued mortgage-backed securities remains illiquid and prices have not appreciated despite favorable movements in interest rates. To determine if a decline in value is other-than-temporary, the Company evaluates if it has the intent to sell these securities or if it is more likely than not that the Company would be required to sell the securities before the anticipated recovery.
	Premiums and discounts on securities are amortized and accreted to income using a method that approximates the interest method over the remaining period to contractual maturity, adjusted for anticipated prepayments. Dividend and interest income are recognized when earned. Realized gains and losses are recognized when securities are sold or called based on the specific identification method.
	Fair Value of Financial Instruments
	GAAP establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (level 1 measurements) and the lowest priority to unobservable inputs (level 3 measurements). A financial instrument’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement.
	Federal Home Loan Bank of New York Stock
	The Bank, as a member of the Federal Home Loan Bank of New York (“FHLB”), is required to hold shares of capital stock of the FHLB at cost based on a specified formula. The Bank carries this investment at cost, which approximates fair value.
	Loans
	Loans receivable are carried at unpaid principal balances plus unamortized premiums, purchase accounting mark-to-market adjustments, certain deferred direct loan origination costs and deferred loan origination fees and discounts, less the allowance for loan losses.
	The Bank defers loan origination fees and certain direct loan origination costs and accretes such amounts as an adjustment to yield over the expected lives of the related loans using the interest method. Premiums and discounts on loans purchased are amortized or accreted as an adjustment of yield over the contractual lives of the related loans, adjusted for prepayments when applicable, using methodologies which approximate the interest method.
	Loans are generally placed on non-accrual status when they are past due 90 days or more as to contractual obligations or when other circumstances indicate that collection is questionable. When a loan is placed on non-accrual status, any interest accrued but not received is reversed against interest income. Payments received on a non-accrual loan are either applied to the outstanding principal balance or recorded as interest income, depending on an assessment of the ability to collect the loan. A non-accrual loan is restored to accrual status when principal and interest payments become less than 90 days past due and its future collectibility is reasonably assured.
	An impaired loan is defined as a loan for which it is probable, based on current information, that the lender will not collect all amounts due under the contractual terms of the loan agreement. Impaired loans are individually assessed to determine that each loan’s carrying value is not in excess of the fair value of the related collateral or the present value of the expected future cash flows. Residential mortgage and consumer loans are deemed smaller balance homogeneous loans which are evaluated collectively for impairment and are therefore excluded from the population of impaired loans.
	Purchased Credit-Impaired (“PCI”) loans, are loans acquired at a discount primarily due to deteriorated credit quality. PCI loans are recorded at fair value at the date of acquisition, with no allowance for loan losses. The difference between the undiscounted cash flows expected at acquisition and the fair value of the PCI loans at acquisition represents the accretable yield and is recognized as interest income over the life of the loans. Contractually required payments for interest and principal that exceed the undiscounted cash flows expected at acquisition represent the non-accretable discount and are not recognized as a yield adjustment or a valuation allowance. Reclassifications of the non-accretable to accretable yield may occur subsequent to the loan acquisition dates due to an increase in expected cash flows of the loans and results in an increase in interest income on a prospective basis.
	Allowance for Loan Losses
	Losses on loans are charged to the allowance for loan losses. Additions to this allowance are made by recoveries of loans previously charged off and by a provision charged to expense. The determination of the balance of the allowance for loan losses is based on an analysis of the loan portfolio, economic conditions, historical loan loss experience and other factors that warrant recognition in providing for an adequate allowance.
	While management uses available information to recognize losses on loans, future additions to the allowance for loan losses may be necessary based on changes in economic conditions in the Bank’s market area. In addition, various regulatory agencies, as an integral part of their examination process, periodically review the Bank’s allowance for loan losses. Such agencies may require the Bank to recognize additions to the allowance or additional write-downs based on their judgments about information available to them at the time of their examination.
	Foreclosed Assets
	Assets acquired through foreclosure or deed in lieu of foreclosure are carried at the lower of the outstanding loan balance at the time of foreclosure or fair value, less estimated costs to sell. Fair value is generally based on recent appraisals. When an asset is acquired, the excess of the loan balance over fair value, less estimated costs to sell, is charged to the allowance for loan losses. A reserve for foreclosed assets may be established to provide for possible write-downs and selling costs that occur subsequent to foreclosure. Foreclosed assets are carried net of the related reserve. Operating results from real estate owned, including rental income, operating expenses, and gains and losses realized from the sales of real estate owned, are recorded as incurred.
	Banking Premises and Equipment
	Land is carried at cost. Banking premises, furniture, fixtures and equipment are carried at cost, less accumulated depreciation, computed using the straight-line method based on their estimated useful lives (generally 25 to 40 years for buildings and 3 to 5 years for furniture and equipment). Leasehold improvements, carried at cost, net of accumulated depreciation, are amortized over the terms of the leases or the estimated useful lives of the assets, whichever are shorter, using the straight-line method. Maintenance and repairs are charged to expense as incurred.
	Income Taxes
	The Company uses the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates in effect for the year in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. The determination of whether deferred tax assets will be realizable is predicated on estimates of future taxable income. Such estimates are subject to management’s judgment. A valuation reserve is established when management is unable to conclude that it is more likely than not that it will realize deferred tax assets based on the nature and timing of these items. The Company recognizes, when applicable, interest and penalties related to unrecognized tax benefits in the provision for income taxes.
	Trust Assets
	Trust assets consisting of securities and other property (other than cash on deposit held by the Bank in fiduciary or agency capacities for customers of the Bank’s wholly owned subsidiary, Beacon Trust Company) are not included in the accompanying consolidated statements of financial condition because such properties are not assets of the Bank.
	Intangible Assets
	Intangible assets of the Bank consist of goodwill, core deposit premiums, customer relationship premium and mortgage servicing rights. Goodwill represents the excess of the purchase price over the estimated fair value of identifiable net assets acquired through purchase acquisitions. In accordance with GAAP, goodwill with an indefinite useful life is not amortized, but is evaluated for impairment on an annual basis, or more frequently if events or changes in circumstances indicate potential impairment between annual measurement dates. Goodwill is analyzed for impairment each year at September 30th. As permitted by GAAP, the Company prepares a qualitative assessment in determining whether goodwill may be impaired. The factors considered in the assessment include macroeconomic conditions, industry and market conditions and overall financial performance of the Company, among others. The Company completed its annual goodwill impairment test as of September 30, 2014. Based upon its qualitative assessment of goodwill, the Company concluded that goodwill was not impaired and no further quantitative analysis was warranted.
	Core deposit premiums represent the intangible value of depositor relationships assumed in purchase acquisitions and are amortized on an accelerated basis over 8.8 years. Customer relationship premiums represent the intangible value of customer relationships assumed in the purchase acquisition of Beacon and are amortized on an accelerated basis over 12.0 years. Mortgage servicing rights are recorded when purchased or when originated mortgage loans are sold, with servicing rights retained. Mortgage servicing rights are amortized on an accelerated method based upon the estimated lives of the related loans, adjusted for prepayments. Mortgage servicing rights are carried at the lower of amortized cost or fair value.
	Bank-owned Life Insurance
	Bank-owned life insurance is accounted for using the cash surrender value method and is recorded at its realizable value.
	Employee Benefit Plans
	The Bank maintains a pension plan which covers full-time employees hired prior to April 1, 2003, the date on which the pension plan was frozen. The Bank’s policy is to fund at least the minimum contribution required by the Employee Retirement Income Security Act of 1974. GAAP requires an employer to: (a) recognize in its statement of financial position the over-funded or under-funded status of a defined benefit postretirement plan measured as the difference between the fair value of plan assets and the benefit obligation; (b) measure a plan’s assets and its obligations that determine its funded status at the end of the employer’s fiscal year (with limited exceptions); and (c) recognize as a component of other comprehensive income, net of tax, the actuarial gains and losses and the prior service costs and credits that arise during the period.
	The Bank has a 401(k) plan covering substantially all employees of the Bank. The Bank may match a percentage of the first 6% contributed by participants. The Bank’s matching contribution, if any, is determined by the Board of Directors in its sole discretion.
	The Bank has an Employee Stock Ownership Plan (“ESOP”). The funds borrowed by the ESOP from the Company to purchase the Company’s common stock are being repaid from the Bank’s contributions and dividends paid on unallocated ESOP shares over a period of up to 30 years. The Company’s common stock not allocated to participants is recorded as a reduction of stockholders’ equity at cost. Compensation expense for the ESOP is based on the average price of the Company’s stock during each quarter and the amount of shares allocated during the quarter.
	The Bank has an Equity Plan designed to provide competitive compensation for demonstrated performance and to align the interests of participants directly to increases in shareholder value. The Equity Plan provides for performance-vesting grants as well as time-vesting grants. Time-vesting stock awards, stock options and performance vesting stock awards that are based on a performance condition, such as Earnings Per Share are valued on the closing stock price on the date of grant. Performance vesting stock awards and options that are based on a market condition, such as Total Shareholder Return, would be valued using a generally accepted statistical technique to simulate future stock prices for Provident and the components of the Peer Group which Provident would be measured against.
	Expense related to time vesting stock awards and stock options is based on the fair value of the common stock on the date of the grant and on the fair value of the stock options on the date of the grant, respectively, and is recognized ratably over the vesting period of the awards. Performance vesting stock awards and stock options are either dependent upon a market condition or a performance condition. A market condition performance metric is tied to a stock price, either on an absolute basis, or a relative basis against peers, while a performance-condition is based on internal operations, such as earnings per share. The expense related to a market condition performance-vesting stock award or stock option requires an initial Monte Carlo simulation to determine grant date fair value, which will be recognized as a compensation expense regardless of actual payout, assuming that the executive is still employed at the end of the requisite service period. If pre-vesting termination (forfeiture) occurs, then any expense recognized to date can be reversed. The grant date fair value is recognized ratably over the performance period. The expense related to a performance condition stock award or stock option is based on the fair value of the award on the date of grant, adjusted periodically based upon the number of awards or options expected to be earned, recognized over the performance period.
	In connection with the First Sentinel acquisition in July 2004, the Company assumed the First Savings Bank Directors’ Deferred Fee Plan (the “DDFP”). The DDFP was frozen prior to the acquisition. The Company recorded a deferred compensation equity instrument and corresponding contra-equity account for the value of the shares held by the DDFP at the July 14, 2004 acquisition date. These accounts will be liquidated as shares are distributed from the DDFP in accordance with the plan document. At December 31, 2014, there were 406,883 shares held by the DDFP.
	The Bank maintains a non-qualified plan that provides supplemental benefits to certain executives who are prevented from receiving the full benefits contemplated by the 401(k) Plan’s and the ESOP’s benefit formulas under tax law limits for tax-qualified plans.
	Postretirement Benefits Other Than Pensions
	The Bank provides postretirement health care and life insurance plans to certain of its employees. The life insurance coverage is noncontributory to the participant. Participants contribute to the cost of medical coverage based on the employee’s length of service with the Bank. The costs of such benefits are accrued based on actuarial assumptions from the date of hire to the date the employee is fully eligible to receive the benefits. On December 31, 2002, the Bank eliminated postretirement healthcare benefits for employees with less than 10 years of service. GAAP requires an employer to: (a) recognize in its statement of financial position the over-funded or under-funded status of a defined benefit postretirement plan measured as the difference between the fair value of plan assets and the benefit obligation; (b) measure a plan’s assets and its obligations that determine its funded status as of the end of the employer’s fiscal year (with limited exceptions); and (c) recognize as a component of other comprehensive income, net of tax, the actuarial gains and losses and the prior service costs and credits that arise during the period.
	Derivatives
	The Company records all derivatives on the balance sheet at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether the Company has elected to designate a derivative in a hedging relationship and apply hedge accounting and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. Currently, none of the Company’s derivatives are designated in qualifying hedging relationships. The existing interest rate derivatives result from a service provided to certain qualifying borrowers in a loan related transaction and, therefore, are not used to manage interest rate risk in the Company’s assets or liabilities. As such, all changes in fair value of the Company’s derivatives are recognized directly in earnings. The fair value of the Company's derivatives are determined using discounted cash flow analysis using observable market-based inputs.
	Comprehensive Income
	Comprehensive income is divided into net income and other comprehensive income. Other comprehensive income includes items previously recorded directly to equity, such as unrealized gains and losses on securities available for sale and amortization related to post-retirement obligations. Comprehensive income is presented in a separate Consolidated Statement of Comprehensive Income.
	Segment Reporting
	The Company’s operations are solely in the financial services industry and include providing to its customers traditional banking and other financial services. The Company operates primarily in the geographical regions of northern and central New Jersey and eastern Pennsylvania. Management makes operating decisions and assesses performance based on an ongoing review of the Bank’s consolidated financial results. Therefore, the Company has a single operating segment for financial reporting purposes.
	Earnings Per Share
	Basic earnings per share is computed by dividing income available to common stockholders by the weighted average number of shares outstanding for the period. Diluted earnings per share reflects the potential dilution that could occur if securities or other contracts to issue common stock (such as stock options) were exercised or resulted in the issuance of common stock. These potentially dilutive shares would then be included in the weighted average number of shares outstanding for the period using the treasury stock method. Shares issued and shares reacquired during the period are weighted for the portion of the period that they were outstanding.
	Impact of Recent Accounting Pronouncements
	In August 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-14, “Receivables - Troubled Debt Restructurings by Creditors: Classification of Certain Government-Guaranteed Mortgage Loans upon Foreclosure.” The amendments in this update affect creditors that hold government guaranteed mortgage loans, including those guaranteed by the Federal Housing Administration and the U.S. Department of Veterans Affairs. The amendments in this update require that a mortgage loan be derecognized and that a separate other receivable be recognized upon foreclosure if the following conditions are met (i) the loan has a government guarantee that is not separable from the loan before foreclosure, (ii) at the time of foreclosure, the creditor has the intent to convey the real estate property to the guarantor and make a claim on the guarantee, and the creditor has the ability to recover under that claim, and (iii) at the time of foreclosure, any amount of the claim that is determined on the basis of the fair value of the real estate is fixed. Upon foreclosure, the separate other receivable should be measured based on the amount of the loan balance (principal and interest) expected to be recovered from the guarantor. The amendments in this update are effective for public business entities for annual periods, and interim periods within those annual periods, beginning after December 15, 2014. The Company does not anticipate a significant impact to the consolidated financial statements related to this guidance. The Company will comply with the provisions of this guidance upon its effective date and, if applicable, record a separate other receivable for foreclosed government guaranteed mortgage loans.
	In June 2014, the FASB issued ASU No. 2014-12, "Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period," which requires that a performance target that affects vesting and that could be achieved after the requisite service period be treated as a performance condition. This update is effective for interim and annual periods beginning after December 15, 2015. The amendments can be applied prospectively to all awards granted or modified after the effective date or retrospectively to all awards with performance targets that are outstanding as of the beginning of the earliest annual period presented and to all new or modified awards thereafter. Early adoption is permitted. The Company does not expect that the adoption of this guidance will have a significant impact on the Company’s consolidated financial statements.
	Also in June 2014, the FASB issued ASU No. 2014-11, "Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures" which aligns the accounting for repurchase to maturity transactions and repurchase agreements executed as a repurchase financing with the accounting for other typical repurchase agreements. Going forward, these transactions would all be accounted for as secured borrowings. This update is effective for the first interim or annual period beginning after December 15, 2014. In addition the disclosure of certain transactions accounted for as a sale is effective for the first interim or annual period beginning on or after December 15, 2014, and the disclosure for transactions accounted for as secured borrowings is required for annual periods beginning after December 15, 2014, and interim periods beginning after March 15, 2015. Early adoption is prohibited. The Company is currently assessing the impact that the adoption of this update will have on its consolidated financial statements and disclosures.
	In May 2014, the FASB issued ASU 2014-09, "Revenue from Contracts with Customers." The objective of this amendment is to clarify the principles for recognizing revenue and to develop a common revenue standard for U.S. GAAP. This update affects any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of non-financial assets unless those contracts are in the scope of other standards. For public entities, the amendments in this update are effective for annual reporting periods beginning after December 15, 2016. The Company does not anticipate a material impact to the consolidated financial statements related to this guidance.
	In January 2014, the FASB issued ASU No. 2014-04, “Receivables-Troubled Debt Restructurings by Creditors (Subtopic 310-40): Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure,” which clarifies that an in-substance repossession or foreclosure occurs, and a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan, upon either the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure, or the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. Additionally, this ASU requires interim and annual disclosure of both the amount of foreclosed residential real estate property held by the creditor and the recorded investment in consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure according to local requirements of the applicable jurisdiction. ASU No. 2014-04 is effective for annual and interim periods beginning after December 15, 2014. The Company’s adoption of ASU No. 2014-04 is not expected to have a significant impact on its consolidated financial statements.

Stockholders_Equity_and_Acquis

Stockholders' Equity and Acquisitions	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Stockholders' Equity and Acquisition	Stockholders’ Equity and Acquisitions
	Stockholders’ Equity
	On January 15, 2003, the Bank completed its plan of conversion, and the Bank became a wholly owned subsidiary of the Company. The Company sold 59.6 million shares of common stock (par value $0.01 per share) at $10.00 per share. The Company received net proceeds in the amount of $567.2 million.
	In connection with the Bank’s commitment to its community, the plan of conversion provided for the establishment of a charitable foundation. Provident donated $4.8 million in cash and 1.92 million of authorized but unissued shares of common stock to the foundation, which amounted to $24.0 million in aggregate. The Company recognized an expense, net of income tax benefit, equal to the cash and fair value of the stock during 2003. Conversion costs were deferred and deducted from the proceeds of the shares sold in the offering.
	Upon completion of the plan of conversion, a “liquidation account” was established in an amount equal to the total equity of the Bank as of the latest practicable date prior to the conversion. The liquidation account was established to provide a limited priority claim to the assets of the Bank to “eligible account holders” and “supplemental eligible account holders” as defined in the Plan, who continue to maintain deposits in the Bank after the conversion. In the unlikely event of a complete liquidation of the Bank, and only in such event, each eligible account holder and supplemental eligible account holder would receive a liquidation distribution, prior to any payment to the holder of the Bank’s common stock. This distribution would be based upon each eligible account holder’s and supplemental eligible account holder’s proportionate share of the then total remaining qualifying deposits. At December 31, 2014, the liquidation account, which is an off-balance sheet memorandum account, amounted to $15.7 million.
	Acquisitions
	On May 30, 2014, the Company completed its acquisition of Team Capital Bank ("Team Capital"), which after purchase accounting adjustments added $964.0 million to total assets, $631.2 million to loans, and $769.9 million to deposits. Total consideration paid for Team Capital was $115.1 million: $31.6 million in cash and 4.9 million shares of common stock valued at $83.5 million on the acquisition date. Team Capital was merged with and into the Company's subsidiary, The Provident Bank as of the close of business on the date of acquisition.
	The transaction was accounted for under the acquisition method of accounting. Under this method of accounting, the purchase price has been allocated to the respective assets acquired and liabilities assumed based upon their estimated fair values, net of tax. The excess of consideration paid over the fair value of the net assets acquired has been recorded as goodwill.
	The following table summarizes the estimated fair values of the assets acquired and the liabilities assumed at the date of acquisition from Team Capital, net of cash consideration paid (in thousands):
		At May 30, 2014
	Assets acquired:
	Cash and cash equivalents, net	$	68,650
	Securities available for sale	157,635
	Loans	631,209
	Bank-owned life insurance	22,319
	Banking premises and equipment	24,778
	Accrued interest receivable	3,060
	Goodwill	40,354
	Other intangibles assets	9,868
	Foreclosed assets, net	653
	Other assets	5,448
	Total assets acquired	963,974
	Liabilities assumed:
	Deposits	769,936
	Borrowed Funds	112,835
	Other liabilities	(2,314		)
	Total liabilities assumed	880,457
	Net assets acquired	$	83,517
	The calculation of goodwill is subject to change for up to one year after the date of acquisition as additional information relative to the closing date estimates and uncertainties become available. As the Company finalizes its review of the acquired assets and liabilities, certain adjustments to the recorded carrying values may be required.
	Fair Value Measurement of Assets Assumed and Liabilities Assumed
	The methods used to determine the fair value of the assets acquired and liabilities assumed in the Team Capital acquisition were as follows:
	Securities Available for Sale
	The estimated fair values of the investment securities classified as available for sale were calculated utilizing Level 1 and Level 2 inputs. Management reviewed the data and assumptions used by its third party provider in pricing the securities to ensure the highest level of significant inputs is derived from observable market data. These prices were validated against other pricing sources and broker-dealer indications.
	Loans
	The acquired loan portfolio was valued based on current guidance which defines fair value as the price that would be received to sell an asset or transfer a liability in an orderly transaction between market participants at the measurement date. Level 3 inputs were utilized to value the portfolio and included the use of present value techniques employing cash flow estimates and the incorporated assumptions that marketplace participants would use in estimating fair values. In instances where reliable market information was not available, the Company used its own assumptions in an effort to determine reasonable fair value. Specifically, Management utilized three separate fair value analyses which a market participant would employ in estimating the total fair value adjustment. The three separate fair valuation methodologies used were: 1) interest rate loan fair value analysis; 2) general credit fair value adjustment; and 3) specific credit fair value adjustment.
	To prepare the interest rate fair value analysis, loans were grouped by characteristics such as loan type, term, collateral and rate. Market rates for similar loans were obtained from various external data sources and reviewed by Company management for reasonableness. The average of these rates was used as the fair value interest rate a market participant would utilize. A present value approach was utilized to calculate the interest rate fair value adjustment.
	The general credit fair value adjustment was calculated using a two part general credit fair value analysis: 1) expected lifetime losses; and 2) estimated fair value adjustment for qualitative factors. The expected lifetime losses were calculated using an average of historical losses of the Company, the acquired bank and peer banks. The adjustment related to qualitative factors was impacted by general economic conditions and the risk related to lack of familiarity with the originator's underwriting process.
	To calculate the specific credit fair value adjustment, management reviewed the acquired loan portfolio for loans meeting the definition of an impaired loan with deteriorated credit quality. Loans meeting this definition were reviewed by comparing the contractual cash flows to expected collectible cash flows. The aggregate expected cash flows less the acquisition date fair value resulted in an accretable yield amount. The accretable yield amount will be recognized over the life of the loans on a level yield basis as an adjustment to yield.
	Deposits and Core Deposit Premium
	Core deposit premium represents the value assigned to demand, interest checking, money market and savings accounts acquired as part of an acquisition. The core deposit premium value represents the future economic benefit, including the present value of future tax benefits, of the potential cost savings from acquiring core deposits as part of an acquisition compared to the cost alternative funding sources and was valued utilizing Level 2 inputs.
	Time deposits are not considered to be core deposits as they are assumed to have a low expected average life upon acquisition. The fair value of time deposits represents the present value of the expected contractual payments discounted by market rates for similar time deposits and was valued utilizing Level 2 inputs.
	Borrowed Funds
	The fair value for borrowed funds was obtained from actual prepayment rates from the FHLB - Pittsburgh, a Level 2 input. These borrowings were redeemed after the acquisition date and the fair value adjustment was fully amortized in the quarter ended June 30, 2014.

Restrictions_on_Cash_and_Due_f

Restrictions on Cash and Due from Banks	12 Months Ended
	Dec. 31, 2014
Cash and Cash Equivalents [Abstract]
Restrictions on Cash and Due from Banks	Restrictions on Cash and Due from Banks
	Included in cash on hand and due from banks at December 31, 2014 and 2013 was $20,502,000 and $21,052,000, respectively, representing reserves required by banking regulations.

Investment_Securities_Held_to_

Investment Securities Held to Maturity	12 Months Ended
	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Investment Securities Held to Maturity	Investment Securities Held to Maturity
	Investment securities held to maturity at December 31, 2014 and 2013 are summarized as follows (in thousands):
		2014
		Amortized		Gross		Gross		Fair
		cost		unrealized		unrealized		value
				gains		losses
	Agency obligations	$	6,813	17		(20	)	6,810
	Mortgage-backed securities	2,816		123		—		2,939
	State and municipal obligations	449,410		13,814		(986	)	462,238
	Corporate obligations	10,489		29		(32	)	10,486
		$	469,528	13,983		(1,038	)	482,473
		2013
		Amortized		Gross		Gross		Fair
		cost		unrealized		unrealized		value
				gains		losses
	Agency obligations	$	7,523	13		(66	)	7,470
	Mortgage-backed securities	5,273		247		—		5,520
	State and municipal obligations	334,750		5,435		(7,198	)	332,987
	Corporate obligations	9,954		58		(76	)	9,936
		$	357,500	5,753		(7,340	)	355,913
	The Company generally purchases securities for long-term investment purposes, and differences between carrying and fair values may fluctuate during the investment period. Investment securities held to maturity having a carrying value of $343,127,000 and $186,251,000 at December 31, 2014 and 2013, respectively, were pledged to secure other borrowings, securities sold under repurchase agreements and government deposits.
	The amortized cost and fair value of investment securities held to maturity at December 31, 2014 by contractual maturity are shown below (in thousands). Expected maturities may differ from contractual maturities due to prepayment or early call privileges of the issuer.
		2014
		Amortized		Fair
		cost		value
	Due in one year or less	$	8,939	9,011
	Due after one year through five years	52,090		53,225
	Due after five years through ten years	175,546		181,887
	Due after ten years	230,137		235,411
		$	466,712	479,534
	Mortgage-backed securities totaling $2.8 million at amortized cost and $2.9 million at fair value are excluded from the table above as their expected lives are expected to be shorter than the contractual maturity date due to principal prepayments.
	During 2014, the Company recognized gains of $23,000 and no losses related to calls on certain securities in the held to maturity portfolio, with total proceeds from the calls totaling $15,156,000. In addition, for the year ended December 31, 2014, the Company recognized a gross loss of $3,000, and no gross gain, related to the sale of a security with proceeds of $524,000. The sales of this security was in response to the credit deterioration of the issuer.
	In 2013, the Company recognized gains of $90,000 and no losses related to calls on certain securities in the held to maturity portfolio, with total proceeds from the calls totaling $49,631,000. In addition, for the year ended December 31, 2013, the Company recognized gross gains of $18,000, and no gross losses, related to the sales of certain securities, with the proceeds totaling $524,000. The sales of these securities were in response to the credit deterioration of the issuers.
	The following table represents the Company’s disclosure on investment securities held to maturity with temporary impairment (in thousands):
		December 31, 2014 Unrealized Losses
		Less than 12 months				12 months or longer				Total
		Fair value		Gross		Fair value		Gross		Fair value	Gross
				unrealized				unrealized			unrealized
				losses				losses			losses
	Agency obligations	$	3,735	(20	)	—		—		3,735	(20	)
	State and municipal obligations	27,679		(217	)	47,079		(769	)	74,758	(986	)
	Corporate obligations	6,888		(32	)	—		—		6,888	(32	)
		$	38,302	(269	)	47,079		(769	)	85,381	(1,038	)
		December 31, 2013 Unrealized Losses
		Less than 12 months				12 months or longer				Total
		Fair value		Gross		Fair value		Gross		Fair value	Gross
				unrealized				unrealized			unrealized
				losses				losses			losses
	Agency obligations	$	5,766	(66	)	—		—		5,766	(66	)
	State and municipal obligations	123,988		(5,376	)	19,051		(1,822	)	143,039	(7,198	)
	Corporate obligations	5,387		(76	)	—		—		5,387	(76	)
		$	135,141	(5,518	)	19,051		(1,822	)	154,192	(7,340	)
	Based on its detailed review of the securities portfolio, the Company believes that as of December 31, 2014, securities with unrealized loss positions shown above do not represent impairments that are other-than-temporary. The review of the portfolio for other-than-temporary impairment considered the percentage and length of time the fair value of an investment is below book value as well as general market conditions, changes in interest rates, credit risk, whether the Company has the intent to sell the securities and whether it is not more likely than not that the Company would be required to sell the securities before the anticipated recovery.
	The number of securities in an unrealized loss position as of December 31, 2014 totaled 163, compared with 270 at December 31, 2013. All temporarily impaired investment securities were investment grade at December 31, 2014.

Securities_Available_for_Sale

Securities Available for Sale	12 Months Ended
	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Securities Available for Sale	Securities Available for Sale
	Securities available for sale at December 31, 2014 and 2013 are summarized as follows (in thousands):
		2014
		Amortized		Gross		Gross		Fair value
		cost		unrealized		unrealized
				gains		losses
	U.S. Treasury obligations	$	8,016	3		(3	)	8,016
	Agency obligations	94,871		268		(63	)	95,076
	Mortgage-backed securities	944,796		15,610		(3,149	)	957,257
	State and municipal obligations	6,855		147		—		7,002
	Corporate obligations	6,526		9		(15	)	6,520
	Equity securities	397		127		—		524
		$	1,061,461	16,164		(3,230	)	1,074,395
		2013
		Amortized		Gross		Gross		Fair value
		cost		unrealized		unrealized
				gains		losses
	Agency obligations	$	93,223	372		(179	)	93,416
	Mortgage-backed securities	1,060,013		14,493		(19,532	)	1,054,974
	State and municipal obligations	8,739		171		(152	)	8,758
	Equity securities	357		89		—		446
		$	1,162,332	15,125		(19,863	)	1,157,594
	Securities available for sale having a carrying value of $585,928,000 and $627,053,000 at December 31, 2014 and 2013, respectively, are pledged to secure other borrowings and securities sold under repurchase agreements.
	The amortized cost and fair value of securities available for sale at December 31, 2014, by contractual maturity, are shown below (in thousands). Expected maturities may differ from contractual maturities due to prepayment or early call privileges of the issuer.
		2014
		Amortized		Fair
		cost		value
	Due in one year or less	$	28,709	28,831
	Due after one year through five years	81,558		81,729
	Due after five years through ten years	3,018		3,015
	Due after ten years	2,983		3,039
		$	116,268	116,614
	Mortgage-backed securities totaling $944.8 million at amortized cost and $957.3 million at fair value are excluded from the table above as their expected lives are expected to be shorter than the contractual maturity date due to principal prepayments. Also excluded from the table above are equity securities of $397,000 at amortized cost and $524,000 at fair value.
	During 2014, proceeds from the sale of securities available for sale were $24,509,000, resulting in gross gains of $632,000 and gross losses of $404,000. Also, for the year ended December 31, 2014, proceeds from calls on securities available for sale totaled $740,000, with gross gains of $2,000 and no gross losses recognized.
	For the 2013 period, proceeds from the sale of securities available for sale were $14,310,000 resulting in gross gains of $888,000 and no losses. Also, for the year ended December 31, 2013, proceeds from calls on securities available for sale totaled $896,000, with no gross gains or losses recognized.
	The Company estimates the loss projections for each non-agency mortgage-backed security by stressing the individual loans collateralizing the security and applying a range of expected default rates, loss severities, and prepayment speeds in conjunction with the underlying credit enhancement for each security. Based on specific assumptions about collateral and vintage, a range of possible cash flows was identified to determine whether other-than-temporary impairment existed during the year ended December 31, 2014.
	The following table presents a roll-forward of the credit loss component of other-than-temporary impairment (“OTTI”) on debt securities for which a non-credit component of OTTI was recognized in other comprehensive income. OTTI recognized in earnings after that date for credit-impaired debt securities is presented as an addition in two components, based upon whether the current period is the first time a debt security was credit-impaired (initial credit impairment) or is not the first time a debt security was credit impaired (subsequent credit impairment). Changes in the credit loss component of credit-impaired debt securities were as follows (in thousands):
		December 31,		December 31,
		2014		2013
	Beginning credit loss amount	$	1,674	1,240
	Add: Initial OTTI credit losses	—		—
	Subsequent OTTI credit losses	—		434
	Less: Realized losses for securities sold	1,674		—
	Securities intended or required to be sold	—		—
	Increases in expected cash flows on debt securities	—		—
	Ending credit loss amount	$	—	1,674
	The Company did not incur a net other-than-temporary impairment charge on securities for the year ended December 31, 2014. During the 2014 period, the Company realized a $59,000 gain and a $365,000 loss on the sale of previously impaired non-Agency mortgage-backed securities, respectively. The Company previously incurred cumulative credit losses of $1.7 million on these securities. For the prior year period, the Company incurred a $434,000 subsequent net other-than-temporary impairment charge on a previously impaired non-Agency mortgage-backed security. Prior to these charges, any impairment was considered temporary and was recorded as an unrealized loss on securities available for sale and reflected as a reduction of equity, net of tax, through accumulated other comprehensive income.
	The following table represents the Company’s disclosure on securities available for sale with temporary impairment (in thousands):
		December 31, 2014 Unrealized Losses
		Less than 12 months				12 months or longer				Total
		Fair value		Gross		Fair value		Gross		Fair value	Gross
				unrealized				unrealized			unrealized
				losses				losses			losses
	U.S. Treasury obligations	$	5,937	(3	)	—		—		5,937	(3	)
	Agency obligations	24,404		(40	)	5,010		(23	)	29,414	(63	)
	Mortgage-backed securities	55,488		(221	)	206,669		(2,928	)	262,157	(3,149	)
	State and municipal obligations	—		—		—		—		—	—
	Corporate obligations	3,466		(15	)	—		—		3,466	(15	)
		$	89,295	(279	)	211,679		(2,951	)	300,974	(3,230	)
		December 31, 2013 Unrealized Losses
		Less than 12 months				12 months or longer				Total
		Fair value		Gross		Fair value		Gross		Fair value	Gross
				unrealized				unrealized			unrealized
				losses				losses			losses
Agency obligations	$	34,355	(179	)	—		—		34,355	(179	)
Mortgage-backed securities	604,778		(18,850	)	13,521		(682	)	618,299	(19,532	)
State and municipal obligations	2,867		(152	)	—		—		2,867	(152	)
	$	642,000	(19,181	)	13,521		(682	)	655,521	(19,863	)
The temporary loss position associated with debt securities is the result of changes in interest rates relative to the coupon of the individual security and changes in credit spreads. In addition, there remains a lack of liquidity in certain sectors of the mortgage-backed securities market. Increases in delinquencies and foreclosures have resulted in limited trading activity and significant price declines, regardless of favorable movements in interest rates. The Company does not have the intent to sell securities in a temporary loss position at December 31, 2014, nor is it more likely than not that the Company will be required to sell the securities before the anticipated recovery.
The number of securities in an unrealized loss position as of December 31, 2014 totaled 43, compared with 76 at December 31, 2013. There were two private label mortgage-backed security in an unrealized loss position at December 31, 2014, with an amortized cost of $1,800,000 and unrealized losses totaling $16,200. Both private label mortgage-backed securities were investment grade at December 31, 2014.

Loans_Receivable_and_Allowance

Loans Receivable and Allowance for Loan Losses	12 Months Ended
	Dec. 31, 2014
Receivables [Abstract]
Loans Receivable and Allowance for Loan Losses	Loans Receivable and Allowance for Loan Losses
	Loans receivable at December 31, 2014 and 2013 are summarized as follows (in thousands):
		2014				2013
	Mortgage loans:
	Residential	$	1,251,445			1,174,043
	Commercial	1,694,359				1,400,624
	Multi-family	1,041,582				928,906
	Construction	221,102				183,289
	Total mortgage loans	4,208,488				3,686,862
	Commercial loans	1,262,422				932,199
	Consumer loans	611,467				577,602
	Total gross loans	6,082,377				5,196,663
	Purchased credit-impaired ("PCI") loans	4,510				—
	Premiums on purchased loans	5,307				4,202
	Unearned discounts	(53		)		(62	)
	Net deferred fees	(6,636		)		(5,990	)
		$	6,085,505			5,194,813
	Premiums and discounts on purchased loans are amortized over the lives of the loans as an adjustment to yield. Required reductions due to loan prepayments are charged against interest income. For the years ended December 31, 2014, 2013 and 2012, $694,000, $1,286,000 and $1,694,000, respectively, decreased interest income as a result of prepayments and normal amortization.
	The following table summarizes the aging of loans receivable by portfolio segment and class of loans , excluding PCI loans (in thousands):
		At December 31, 2014
		30-59 Days				60-89 Days		Non-accrual		Total Past Due			Current		Total Loans		Recorded
															Receivable		Investment >
																	90 days
																	accruing
	Mortgage loans:														.
	Residential	$	10,121			4,331		17,222		31,674			1,219,771		1,251,445		—
	Commercial	146				30		20,026		20,202			1,674,157		1,694,359		—
	Multi-family	—				—		321		321			1,041,261		1,041,582		—
	Construction	—				—		—		—			221,102		221,102		—
	Total mortgage loans	10,267				4,361		37,569		52,197			4,156,291		4,208,488		—
	Commercial loans	1,000				371		12,342		13,713			1,248,709		1,262,422		—
	Consumer loans	2,398				2,509		3,944		8,851			602,616		611,467		—
	Total gross loans	$	13,665			7,241		53,855		74,761			6,007,616		6,082,377		—
		At December 31, 2013
		30-59 Days				60-89 Days		Non-accrual		Total Past Due			Current		Total Loans		Recorded
															Receivable		Investment >
																	90 days
																	accruing
	Mortgage loans:
	Residential	$	10,639			5,062		23,011		38,712			1,135,331		1,174,043		—
	Commercial	687				318		18,662		19,667			1,380,957		1,400,624		—
	Multi-family	—				—		403		403			928,503		928,906		—
	Construction	—				—		8,448		8,448			174,841		183,289		—
	Total mortgage loans	11,326				5,380		50,524		67,230			3,619,632		3,686,862		—
	Commercial loans	305				77		22,228		22,610			909,589		932,199		—
	Consumer loans	2,474				2,194		3,928		8,596			569,006		577,602		—
	Total gross loans	$	14,105			7,651		76,680		98,436			5,098,227		5,196,663		—
	Included in loans receivable are loans for which the accrual of interest income has been discontinued due to deterioration in the financial condition of the borrowers. The principal amount of these nonaccrual loans was $53.9 million and $76.7 million at December 31, 2014 and 2013, respectively. There were no loans ninety days or greater past due and still accruing interest at December 31, 2014, or 2013.
	If the non-accrual loans had performed in accordance with their original terms, interest income would have increased by $1,877,000, $1,913,000 and $3,022,000, for the years ended December 31, 2014, 2013 and 2012, respectively. The amount of cash basis interest income that was recognized on impaired loans during the years ended December 31, 2014, 2013 and 2012 was not material for the periods presented.
	The Company defines an impaired loan as a non-homogenous loan greater than $1.0 million for which it is probable, based on current information, that the Bank will not collect all amounts due under the contractual terms of the loan agreement. Impaired loans also include all loans modified as troubled debt restructurings (“TDRs”). A loan is deemed to be a TDR when a loan modification resulting in a concession is made by the Bank in an effort to mitigate potential loss arising from a borrower’s financial difficulty. Smaller balance homogeneous loans including residential mortgages and other consumer loans are evaluated collectively for impairment and are excluded from the definition of impaired loans, unless modified as TDRs. The Company separately calculates the reserve for loan loss on impaired loans. The Company may recognize impairment of a loan based upon: (1) the present value of expected cash flows discounted at the effective interest rate; or (2) if a loan is collateral dependent, the fair value of collateral; or (3) the market price of the loan. Additionally, if impaired loans have risk characteristics in common, those loans may be aggregated and historical statistics may be used as a means of measuring those impaired loans.
	The Company uses third-party appraisals to determine the fair value of the underlying collateral in its analyses of collateral dependent impaired loans. A third party appraisal is generally ordered as soon as a loan is designated as a collateral dependent impaired loan and updated annually, or more frequently if required.
	A specific allocation of the allowance for loan losses is established for each impaired loan with a carrying balance greater than the collateral’s fair value, less estimated costs to sell. Charge-offs are generally taken for the amount of the specific allocation when operations associated with the respective property cease and it is determined that collection of amounts due will be derived primarily from the disposition of the collateral. At each fiscal quarter end, if a loan is designated as a collateral dependent impaired loan and the third party appraisal has not yet been received, an evaluation of all available collateral is made using the best information available at the time, including rent rolls, borrower financial statements and tax returns, prior appraisals, management’s knowledge of the market and collateral, and internally prepared collateral valuations based upon market assumptions regarding vacancy and capitalization rates, each as and where applicable. Once the appraisal is received and reviewed, the specific reserves are adjusted to reflect the appraised value. The Company believes there have been no significant time lapses as a result of this process.
	At December 31, 2014, there were 147 impaired loans totaling $85.4 million, of which 143 loans totaling $81.7 million were TDRs. Included in this total were 123 TDRs related to 120 borrowers totaling $54.8 million that were performing in accordance with their restructured terms and which continued to accrue interest at December 31, 2014. At December 31, 2013, there were 152 impaired loans totaling $106.4 million, of which 142 loans totaling $89.4 million were TDRs. Included in this total were 115 TDRs related to 110 borrowers totaling $58.2 million that were performing in accordance with their restructured terms and which continued to accrue interest at December 31, 2013.
	Loans receivable summarized by portfolio segment and impairment method, excluding PCI loans are as follows (in thousands):
		At December 31, 2014
		Mortgage				Commercial		Consumer		Total
		loans				loans		loans		Portfolio
										Segments
	Individually evaluated for impairment	$	66,548			16,463		2,384		85,395
	Collectively evaluated for impairment	4,141,940				1,245,959		609,083		5,996,982
	Total gross loans	$	4,208,488			1,262,422		611,467		6,082,377
		At December 31, 2013
		Mortgage				Commercial		Consumer		Total
		loans				loans		loans		Portfolio
								Segments
Individually evaluated for impairment	$	75,839			28,210		2,321		106,370
Collectively evaluated for impairment	3,611,023				903,989		575,281		5,090,293
Total gross loans	$	3,686,862			932,199		577,602		5,196,663
The allowance for loan losses is summarized by portfolio segment and impairment classification, excluding PCI loans as follows (in thousands):
	At December 31, 2014
	Mortgage				Commercial		Consumer		Total			Unallocated		Total
	loans				loans		loans		Portfolio
									Segments
Individually evaluated for impairment	$	4,696			2,318		113		7,127			—		7,127
Collectively evaluated for impairment	27,281				22,063		4,768		54,112			495		54,607
Total	$	31,977			24,381		4,881		61,239			495		61,734
	At December 31, 2013
	Mortgage				Commercial		Consumer		Total			Unallocated		Total
	loans				loans		loans		Portfolio
									Segments
Individually evaluated for impairment	$	7,829			2,221		167		10,217			—		10,217
Collectively evaluated for impairment	26,315				21,886		4,762		52,963			1,484		54,447
Total	$	34,144			24,107		4,929		63,180			1,484		64,664
Loan modifications to customers experiencing financial difficulties that are considered TDRs primarily involve lowering the monthly payments on such loans through either a reduction in interest rate below a market rate, an extension of the term of the loan without a corresponding adjustment to the risk premium reflected in the interest rate, or a combination of these two methods. These modifications generally do not result in the forgiveness of principal or accrued interest. In addition, the Company attempts to obtain additional collateral or guarantor support when modifying such loans. If the borrower has demonstrated performance under the previous terms and our underwriting process shows the borrower has the capacity to continue to perform under the restructured terms, the loan will continue to accrue interest. Non-accruing restructured loans may be returned to accrual status when there has been a sustained period of repayment performance (generally six consecutive months of payments) and both principal and interest are deemed collectible.
The following tables present the number of loans modified as TDRs during the years ended December 31, 2014 and 2013 and their balances immediately prior to the modification date and post-modification as of December 31, 2014 and 2013.
		Year Ended December 31, 2014
Troubled Debt Restructurings		Number of			Pre-Modification			Post-Modification
		Loans			Outstanding			Outstanding
					Recorded			Recorded
					Investment			Investment
		($ in thousands)
Mortgage loans:
Residential		14			$	3,034		2,725
Commercial		1			865			861
Total mortgage loans		15			3,899			3,586
Commercial loans		—			—			—
Consumer loans		2			394			156
Total restructured loans		17			$	4,293		3,742
		Year Ended December 31, 2013
Troubled Debt Restructurings		Number of			Pre-Modification			Post-Modification
		Loans			Outstanding			Outstanding
					Recorded			Recorded
					Investment			Investment
					($ in thousands)
Mortgage loans:
Residential		42			$	9,097		9,149
Commercial		1			330			304
Total mortgage loans		43			9,427			9,453
Commercial loans		3			1,846			1,816
Consumer loans		8			1,119			1,095
Total restructured loans		54			$	12,392		12,364
All TDRs are impaired loans, which are individually evaluated for impairment, as previously discussed. Estimated collateral values of collateral dependent impaired loans modified during the years ended December 31, 2014 and 2013 exceeded the carrying amounts of such loans. As a result, there were no charge-offs recorded on collateral dependent impaired loans presented in the preceding tables for the years ended December 31, 2014 or December 31, 2013. The allowance for loan losses associated with the TDRs presented in the preceding tables totaled $419,000 and $1.0 million at December 31, 2014 and 2013, respectively and were included in the allowance for loan losses for loans individually evaluated for impairment.
The TDRs presented in the preceding tables had a weighted average modified interest rate of approximately 4.58% and 4.08%, compared to a yield of 5.69% and 5.75% prior to modification for the years ended December 31, 2014 and 2013, respectively.
The following table presents loans modified as TDRs within the previous 12 months from December 31, 2014 and 2013, and for which there was a payment default (90 days or more past due) during the years ended December 31, 2014 and 2013:
		Year Ended						Year Ended
		December 31, 2014						December 31, 2013
Troubled Debt Restructurings Subsequently Defaulted		Number of			Outstanding			Number of		Outstanding
		Loans			Recorded			Loans		Recorded
					Investment					Investment
					($ in thousands)					($ in thousands)
Commercial loans		—			—			3		1,815
Consumer loans		—			—			1		130
Total restructured loans		—			$	—		4		$	1,945
TDRs that subsequently default are considered collateral dependent impaired loans and are evaluated for impairment based on the estimated fair value of the underlying collateral less expected selling costs.
PCI loans are loans acquired at a discount primarily due to deteriorated credit quality. As part of the Team Capital acquisition, $5.2 million of the loans purchased at May 30, 2014 were determined to be PCI loans. PCI loans are accounted for at fair value, based upon the present value of expected future cash flows, with no related allowance for loan losses.
The following table presents information regarding the estimates of the contractually required payments, the cash flows expected to be collected and the estimated fair value of the PCI loans acquired from Team Capital at May 30, 2014 (in thousands):
		30-May-14
Contractually required principal and interest		$	12,505
Contractual cash flows not expected to be collected (non-accretable discount)		(6,475		)
Expected cash flows to be collected at acquisition		6,030
Interest component of expected cash flows (accretable yield)		(810		)
Fair value of acquired loans		$	5,220
PCI loans declined $710,000 to $4.5 million at December 31, 2014, from $5.2 million at acquisition from Team Capital on May 30, 2014, largely due to the full repayment and greater than projected cash flows on certain PCI loans. This resulted in a $348,000 increase in interest income for the year ended December 31, 2014, due to the acceleration of accretable and non-accretable discount on these loans.
The following table summarizes the changes in the accretable yield for PCI loans for the ended December 31, 2014 (in thousands):
		Year ended December 31, 2014
Beginning balance		$	—
Acquisition		810
Accretion		(592		)
Reclassification from non-accretable difference		477
Ending balance		$	695
The activity in the allowance for loan losses for the years ended December 31, 2014, 2013 and 2012 is as follows (in thousands):
	Years Ended December 31,
	2014				2013		2012
Balance at beginning of period	$	64,664			70,348		74,351
Provision charged to operations	4,650				5,500		16,000
Recoveries of loans previously charged off	3,292				3,222		3,904
Loans charged off	(10,872		)		(14,406	)	(23,907	)
Balance at end of period	$	61,734			64,664		70,348
The activity in the allowance for loan losses by portfolio segment for the years ended December 31, 2014 and 2013 are as follows (in thousands):
	For the Year Ended December 31, 2014
	Mortgage				Commercial		Consumer		Total			Unallocated		Total
	loans				loans		loans		Portfolio
									Segments
Balance at beginning of period	$	34,144			24,107		4,929		63,180			1,484		64,664
Provision charged to operations	1,455				2,947		1,237		5,639			(989	)	4,650
Recoveries of loans previously charged off	286				1,776		1,230		3,292			—		3,292
Loans charged off	(3,908		)		(4,449	)	(2,515	)	(10,872	)		—		(10,872	)
Balance at end of period	$	31,977			24,381		4,881		61,239			495		61,734
	Year ended December 31, 2013
	Mortgage				Commercial		Consumer		Total			Unallocated		Total
	loans				loans		loans		Portfolio
									Segments
Balance at beginning of period	$	37,962			20,315		5,224		63,501			6,847		70,348
Provision charged to operations	2,065				6,403		2,395		10,863			(5,363	)	5,500
Recoveries of loans previously charged off	1,133				1,075		1,014		3,222			—		3,222
Loans charged off	(7,016		)		(3,686	)	(3,704	)	(14,406	)		—		(14,406	)
Balance at end of period	$	34,144			24,107		4,929		63,180			1,484		64,664
Impaired loans receivable by class, excluding PCI loans are summarized as follows (in thousands):
	At December 31, 2014													At December 31, 2013
	Unpaid				Recorded		Related		Average			Interest		Unpaid			Recorded		Related	Average	Interest
	Principal				Investment		Allowance		Recorded			Income		Principal			Investment		Allowance	Recorded	Income
	Balance								Investment			Recognized		Balance						Investment	Recognized
Loans with no related allowance
Mortgage loans:
Residential	$	14,942			10,629		—		11,138			357		13,459			9,999		—	10,322	299
Commercial	4,971				4,708		—		4,713			—		4,917			4,667		—	4,834	3
Multi-family	—				—		—		—			—		—			—		—	—	—
Construction	—				—		—		—			—		—			—		—	—	—
Total	19,913				15,337		—		15,851			357		18,376			14,666		—	15,156	302
Commercial loans	2,718				2,179		—		1,823			4		8,163			6,674		—	8,252	24
Consumer loans	1,250				830		—		870			28		754			618		—	674	26
Total loans	$	23,881			18,346		—		18,544			389		27,293			21,958		—	24,082	352
Loans with an allow-ance recorded
Mortgage loans:
Residential	$	15,523			14,906		2,367		15,106			555		$	17,122		16,473		2,571	16,610	557
Commercial	37,555				36,306		2,329		36,674			914		37,320			36,251		2,309	36,727	976
Multi-family	—				—		—		—			—		—			—		—	—	—
Construction	—				—		—		—			—		9,810			8,449		2,949	8,659	—
Total	53,078				51,212		4,696		51,780			1,469		64,252			61,173		7,829	61,996	1,533
Commercial loans	15,990				14,283		2,318		15,967			390		22,779			21,536		2,221	23,204	650
Consumer loans	1,565				1,554		113		1,578			80		1,732			1,703		167	1,726	63
Total loans	$	70,633			67,049		7,127		69,325			1,939		$	88,763		84,412		10,217	86,926	2,246
Total
Mortgage loans:
Residential	$	30,465			25,535		2,367		26,244			912		$	30,581		26,472		2,571	26,932	856
Commercial	42,526				41,014		2,329		41,387			914		42,237			40,918		2,309	41,561	979
Multi-family	—				—		—		—			—		—			—		—	—	—
Construction	—				—		—		—			—		9,810			8,449		2,949	8,659	—
Total	72,991				66,549		4,696		67,631			1,826		82,628			75,839		7,829	77,152	1,835
Commercial loans	18,708				16,462		2,318		17,790			394		30,942			28,210		2,221	31,456	674
Consumer loans	2,815				2,384		113		2,448			108		2,486			2,321		167	2,400	89
Total loans	$	94,514			85,395		7,127		87,869			2,328		$	116,056		106,370		10,217	111,008	2,598
At December 31, 2014, impaired loans consisted of 147 residential, commercial and commercial mortgage loans totaling $85,395,000, of which 24 loans totaling $30,619,000 were included in nonaccrual loans. At December 31, 2013, impaired loans consisted of 152 residential, commercial and commercial mortgage loans totaling $106,370,000, of which 37 loans totaling $48,204,000 were included in nonaccrual loans. Specific allocations of the allowance for loan losses attributable to impaired loans totaled $7,127,000 and $10,217,000 at December 31, 2014 and 2013, respectively. At December 31, 2014 and 2013, impaired loans for which there was no related allowance for loan losses totaled $18,346,000 and $21,958,000, respectively. The average balances of impaired loans during the years ended December 31, 2014, 2013 and 2012 were $87,869,000, $111,008,000 and $115,611,000, respectively.
In the normal course of conducting its business, the Bank extends credit to meet the financing needs of its customers through commitments. Commitments and contingent liabilities, such as commitments to extend credit (including loan commitments of $908,581,000 and $657,563,000, at December 31, 2014 and 2013, respectively, and undisbursed home equity and personal credit lines of $300,029,000 and $252,522,000, at December 31, 2014 and 2013, respectively) exist, which are not reflected in the accompanying consolidated financial statements. These instruments involve elements of credit and interest rate risk in excess of the amount recognized in the consolidated financial statements. The Bank uses the same credit policies and collateral requirements in making commitments and conditional obligations as it does for on-balance sheet loans. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since the commitments may expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements.
The Bank evaluates each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by the Bank upon extension of credit, is based on management’s credit evaluation of the borrower.
The Bank grants residential real estate loans on single- and multi-family dwellings to borrowers primarily in New Jersey. Its borrowers’ abilities to repay their obligations are dependent upon various factors, including the borrowers’ income and net worth, cash flows generated by the underlying collateral, value of the underlying collateral, and priority of the Bank’s lien on the property. Such factors are dependent upon various economic conditions and individual circumstances beyond the Bank’s control; the Bank is therefore subject to risk of loss. The Bank believes that its lending policies and procedures adequately minimize the potential exposure to such risks and that adequate provisions for loan losses are provided for all known and inherent risks. Collateral and/or guarantees are required for virtually all loans.
The Company utilizes an internal nine-point risk rating system to summarize its loan portfolio into categories with similar risk characteristics. Loans deemed to be “acceptable quality” are rated 1 through 4, with a rating of 1 established for loans with minimal risk. Loans that are deemed to be of “questionable quality” are rated 5 (watch) or 6 (special mention). Loans with adverse classifications (substandard, doubtful or loss) are rated 7, 8 or 9, respectively. Commercial mortgage, commercial, multi-family and construction loans are rated individually, and each lending officer is responsible for risk rating loans in his or her portfolio. These risk ratings are then reviewed by the department manager and/or the Chief Lending Officer and by the Credit Administration Department. The risk ratings are also confirmed through periodic loan review examinations, which are currently performed by an independent third party. Reports by the independent third party are presented directly to the Audit Committee of the Board of Directors.
Loans receivable by credit quality risk rating indicator, excluding PCI loans are as follows (in thousands):
	At December 31, 2014
	Residential				Commercial		Multi-		Construction			Total		Commercial		Consumer		Total loans
					mortgages		family					mortgages		loans		loans
Special mention	$	4,331			18,414		851		—			23,596		45,599		2,509		71,704
Substandard	17,222				53,454		322		2,600			73,598		32,828		3,938		110,364
Doubtful	—				1,063		—		—			1,063		29		—		1,092
Loss	—				—		—		—			—		—		—		—
Total classified and criticized	21,553				72,931		1,173		2,600			98,257		78,456		6,447		183,160
Acceptable/watch	1,229,892				1,621,428		1,040,409		218,502			4,110,231		1,183,966		605,020		5,899,217
Total outstanding loans	$	1,251,445			1,694,359		1,041,582		221,102			4,208,488		1,262,422		611,467		6,082,377
	At December 31, 2013
	Residential				Commercial		Multi-		Construction			Total		Commercial		Consumer		Total loans
					mortgages		family					mortgages		loans		loans
Special mention	$	5,062			15,301		—		—			20,363		28,551		2,037		50,951
Substandard	23,011				54,592		403		8,449			86,455		46,687		4,220		137,362
Doubtful	—				—		—		—			—		649		—		649
Loss	—				—		—		—			—		—		—		—
Total classified and criticized	28,073				69,893		403		8,449			106,818		75,887		6,257		188,962
Acceptable/watch	1,145,970				1,330,731		928,503		174,840			3,580,044		856,312		571,345		5,007,701
Total outstanding loans	$	1,174,043			1,400,624		928,906		183,289			3,686,862		932,199		577,602		5,196,663

Banking_Premises_and_Equipment

Banking Premises and Equipment	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Banking Premises and Equipment	Banking Premises and Equipment
	A summary of banking premises and equipment at December 31, 2014 and 2013 is as follows (in thousands):
		2014		2013
	Land	$	15,767	13,955
	Banking premises	80,526		64,129
	Furniture, fixtures and equipment	42,836		31,565
	Leasehold improvements	33,819		27,503
	Construction in progress	4,053		3,687
		177,001		140,839
	Less accumulated depreciation and amortization	84,011		74,391
		$	92,990	66,448
	Depreciation expense for the years ended December 31, 2014, 2013 and 2012 amounted to $8,264,000, $7,152,000 and $6,929,000, respectively.

Intangible_Assets

Intangible Assets	12 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	Intangible Assets
	Intangible assets at December 31, 2014 and 2013 are summarized as follows (in thousands):
		2014			2013
	Goodwill	$	392,757		352,609
	Core deposit premiums	7,603			1,096
	Customer relationship and other intangibles	2,987			1,563
	Mortgage servicing rights	1,075			1,164
		$	404,422		356,432
	Amortization expense of intangible assets for the years ended December 31, 2014, 2013 and 2012 is as follows (in thousands):
		2014			2013	2012
	Core deposit premiums	$	1,472		965	1,698
	Customer relationship and other intangibles	1,106			335	367
	Mortgage servicing rights	179			324	401
		$	2,757		1,624	2,466
	Scheduled amortization of core deposit and customer relationship intangibles for each of the next five years is as follows (in thousands):
	Year ended December 31,		Scheduled Amortization
	2015		$	2,973
	2016		2,071
	2017		1,530
	2018		1,102
	2019		925

Deposits

Deposits	12 Months Ended
	Dec. 31, 2014
Banking and Thrift [Abstract]
Deposits	Deposits
	Deposits at December 31, 2014 and 2013 are summarized as follows (in thousands):
		2014		Weighted		2013		Weighted
				average				average
				interest rate				interest rate
	Savings deposits	$	995,347	0.1	%	$	921,993	0.09	%
	Money market accounts	1,496,466		0.27		1,281,596		0.25
	NOW accounts	1,425,424		0.27		1,326,941		0.29
	Non-interest bearing deposits	1,049,597		—		865,187		—
	Certificates of deposit	825,689		0.89		806,754		0.97
		$	5,792,523			$	5,202,471
	Scheduled maturities of certificates of deposit accounts at December 31, 2014 and 2013 are as follows (in thousands):
		2014		2013
	Within one year	$	568,462	529,896
	One to three years	152,317		193,457
	Three to five years	100,080		82,344
	Five years and thereafter	4,830		1,057
		$	825,689	806,754
	Interest expense on deposits for the years ended December 31, 2014, 2013 and 2012 is summarized as follows (in thousands):
		Years ended December 31,
		2014		2013		2012
	Savings deposits	$	938	960		1,449
	NOW and money market accounts	7,733		7,456		10,292
	Certificates of deposits	6,661		9,615		13,607
		$	15,332	18,031		25,348

Borrowed_Funds

Borrowed Funds	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Borrowed Funds	Borrowed Funds
	Borrowed funds at December 31, 2014 and 2013 are summarized as follows (in thousands):
		2014		2013
	Securities sold under repurchase agreements	$	246,571	246,322
	FHLB line of credit	73,000		183,000
	FHLB advances	1,190,280		774,557
		$	1,509,851	1,203,879
	FHLB advances are at fixed rates and mature between January 2015 and August 2021. These advances are secured by loans receivable and investment securities under a blanket collateral agreement.
	Scheduled maturities of FHLB advances at December 31, 2014 are as follows (in thousands):
		2014
	Due in one year or less	$	269,668
	Due after one year through two years	150,398
	Due after two years through three years	262,534
	Due after three years through four years	211,220
	Due after four years through five years	203,991
	Thereafter	92,469
		$	1,190,280
	Scheduled maturities of securities sold under repurchase agreements at December 31, 2014 are as follows (in thousands):
		2014
	Due in one year or less	$	91,571
	Due after one year through two years	75,000
	Due after two years through three years	25,000
	Due after three years through four years	20,000
	Due after four years through five years	35,000
	Thereafter	—
		$	246,571
	The following tables set forth certain information as to Borrowed Funds for the years ended December 31, 2014 and 2013 (in thousands):
		Maximum		Average	Weighted
		balance		balance	average
					interest
					rate
	2014:00:00
	Securities sold under repurchase agreements	$	255,633	245,260	1.72	%
	FHLB line of credit	180,000		104,121	0.37
	FHLB advances	1,190,280		989,245	2.08
	Federal funds purchased	—		—	—
	2013:00:00
	Securities sold under repurchase agreements	$	294,034	260,004	1.74	%
	FHLB line of credit	183,000		48,784	0.38
	FHLB advances	774,557		599,991	2.34
	Federal funds purchased	—		253	1
	Securities sold under repurchase agreements include wholesale borrowing arrangements, as well as arrangements with deposit customers of the Bank to sweep funds into short-term borrowings. The Bank uses securities available for sale to pledge as collateral for the repurchase agreements.

Benefit_Plans

Benefit Plans	12 Months Ended
	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Benefit Plans	Benefit Plans
	Pension and Post-retirement Benefits
	The Bank has a noncontributory defined benefit pension plan covering its full-time employees who had attained age 21 with at least one year of service as of April 1, 2003. The pension plan was frozen on April 1, 2003. All participants in the pension plan are 100% vested. The pension plan’s assets are invested in investment funds and group annuity contracts currently managed by the Principal Financial Group and Allmerica Financial. Based on the measurement date of December 31, 2014, management believes that no contributions will be made to the pension plan in 2015.
	In an effort to lower and reduce the volatility of its future pension costs, the Company offered a lump sum pension distribution option to its vested terminated employees in the quarter ended June 30, 2014. For the year ended December 31, 2014, the Plan paid $4.3 million to those employees that elected to receive lump sum pension distributions and the Company realized an associated charge of $1.3 million. This charge was a pro rata share of the unrecognized losses recorded in other comprehensive income.
	In addition to pension benefits, certain healthcare and life insurance benefits are currently made available to certain of the Bank’s retired employees. The costs of such benefits are accrued based on actuarial assumptions from the date of hire to the date the employee is fully eligible to receive the benefits. Effective January 1, 2003, eligibility for retiree health care benefits was frozen as to new entrants and benefits were eliminated for employees with less than ten years of service as of December 31, 2002. Effective January 1, 2007, eligibility for retiree life insurance benefits was frozen to new entrants and retiree life insurance benefits were eliminated for employees with less than ten years of service as of December 31, 2006.
	The following table sets forth information regarding the pension plan and post-retirement healthcare and life insurance plans (in thousands):
		Pension										Post-retirement
		2014				2013			2012			2014			2013			2012
	Change in benefit obligation:
	Benefit obligation at beginning of year	$	28,605			32,189			28,277			22,086			25,116			23,327
	Service cost	—				—			—			169			240			252
	Interest cost	1,271				1,273			1,287			1,087			981			1,043
	Actuarial loss (gain)	51				114			779			51			(210	)		231
	Benefits paid	(5,326		)		(969	)		(891	)		(670	)		(624	)		(634	)
	Change in actuarial assumptions	4,320				(4,002	)		2,737			5,610			(3,417	)		897
	Benefit obligation at end of year	$	28,921			28,605			32,189			28,333			22,086			25,116
	Change in plan assets:
	Fair value of plan assets at beginning of year	$	45,202			40,072			32,666			—			—			—
	Actual return on plan assets	2,868				6,099			4,184			—			—			—
	Employer contributions	—				—			4,113			670			624			634
	Benefits paid	(5,326		)		(969	)		(891	)		(670	)		(624	)		(634	)
	Fair value of plan assets at end of year	$	42,744			45,202			40,072			—			—			—
	Funded status at end of year	$	13,823			16,597			7,883			(28,333	)		(22,086	)		(25,116	)
	For the year ended December 31, 2014, the Company in the measurement of its pension plan and post-retirement obligations updated its mortality assumptions based upon data (RP 2014 and MP 2104) issued by The Society of Actuaries ("SOA") in November 2014. The change in mortality data resulted in an actuarial loss of $1.5 million and $3.0 million for the pension and post-retirement plans, respectively, and was reflected in other comprehensive income for the year ended December 31, 2014. The prepaid pension benefits of $13.8 million and the unfunded post-retirement healthcare and life insurance benefits of $28.3 million at December 31, 2014 are included in other assets and other liabilities, respectively, in the consolidated statement of financial condition.
	The components of accumulated other comprehensive loss (gain) related to the pension plan and other post-retirement benefits, on a pre-tax basis, at December 31, 2014 and 2013 are summarized in the following table (in thousands):
		Pension							Post-retirement
		2014				2013			2014			2013
	Unrecognized prior service cost	$	—			—			(1	)		(5	)
	Unrecognized net actuarial loss (gain)	10,887				7,699			1,788			(4,076	)
	Total accumulated other comprehensive loss (gain)	$	10,887			7,699			1,787			(4,081	)
	Net periodic benefit cost (increase) for the years ending December 31, 2014, 2013 and 2012, included the following components (in thousands):
		Pension										Post-retirement
		2014				2013			2012			2014			2013			2012
	Service cost	$	—			—			—			169			240			252
	Interest cost	1,271				1,273			1,287			1,087			981			1,043
	Return on plan assets	(3,463		)		(3,167	)		(2,578	)		—			—			—
	Amortization of:
	Net gain (loss)	441				1,352			1,428			(204	)		15			12
	Lump sum pension distribution	1,336				—			—			—			—			—
	Unrecognized prior service cost	—				—			—			(4	)		(4	)		(4	)
	Net periodic benefit (increase) cost	$	(415	)		(542	)		137			1,048			1,232			1,303
	The weighted average actuarial assumptions used in the plan determinations at December 31, 2014, 2013 and 2012 were as follows:
		Pension									Post-retirement
		2014			2013			2012			2014			2013			2012
	Discount rate	4	%		5	%		4	%		4	%		5	%		4	%
	Rate of compensation increase	—			—			—			—			—			—
	Expected return on plan assets	8			8			8			—			—			—
	Medical and life insurance benefits cost rate of increase	—			—			—			6			6			6.5
	The Company provides its actuary with certain rate assumptions used in measuring the benefit obligation. The most significant of these is the discount rate used to calculate the period-end present value of the benefit obligations, and the expense to be included in the following year’s financial statements. A lower discount rate will result in a higher benefit obligation and expense, while a higher discount rate will result in a lower benefit obligation and expense. The discount rate assumption was determined based on a cash flow-yield curve model specific to the Company’s pension and post-retirement plans. The Company compares this rate to certain market indices, such as long-term treasury bonds, or the Citigroup pension liability indices, for reasonableness. A discount rate of 4.00% was selected for the December 31, 2014 measurement date and the 2013 expense calculation.
	Assumed health care cost trend rates have a significant effect on the amounts reported for health care plans. A 1% change in the assumed health care cost trend rate would have had the following effects on post-retirement benefits at December 31, 2014 (in thousands):
		1% increase				1% decrease
	Effect on total service cost and interest cost	$	220			(180	)
	Effect on post-retirement benefits obligation	$	5,260			(4,160	)
	Estimated future benefit payments, which reflect expected future service, as appropriate for the next five years, are as follows (in thousands):
		Pension				Post-retirement
	2015	$	1,080,000			$	816,000
	2016	1,141,000				849,000
	2017	1,188,000				882,000
	2018	1,225,000				920,000
	2019	1,269,000				967,000
	The weighted-average asset allocation of pension plan assets at December 31, 2014 and 2013 were as follows:
	Asset Category		2014			2013
	Domestic equities		41	%		44	%
	Foreign equities		12	%		14	%
Fixed income		45	%		40	%
Real estate		2	%		2	%
Cash		0	%		0	%
Total		100	%		100	%
The Company’s expected return on pension plan assets assumption is based on historical investment return experience and evaluation of input from the Investment Consultant and Committee managing the pension plan’s assets. The expected return on pension plan assets is also impacted by the target allocation of assets, which is based on the Company’s goal of earning the highest rate of return while maintaining risk at acceptable levels.
Management strives to have pension plan assets sufficiently diversified so that adverse or unexpected results from one security class will not have a significant detrimental impact on the entire portfolio. The target allocation of assets and acceptable ranges around the targets are as follows:
Asset Category		Target			Allowable Range
Domestic equities		44	%		35-55%
Foreign equities		14	%		5-25%
Fixed income		40	%		30-50%
Real estate		2	%		0-10%
Cash		0	%		0-35%
Total		100	%
The following tables present the assets that are measured at fair value on a recurring basis by level within the U.S. GAAP fair value hierarchy as reported on the statements of net assets available for Plan benefits at December 31, 2014 and 2013, respectively. Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement.
	Fair value measurements at December 31, 2014
(in thousands)	Total				(Level 1)			(Level 2)			(Level 3)
Group annuity contracts	$	152			—			152			—
Mutual funds:
International equity	5,370				5,370			—			—
Large U.S. equity	1,689				1,689			—			—
Small/Mid U.S. equity	1,309				1,309			—			—
Total mutual funds	8,368				8,368			—			—
Pooled separate accounts:
Fixed income	19,789				—			19,789			—
Large U.S. equity	11,857				—			11,857			—
Small/Mid U.S. equity	2,578				—			2,578			—
Total pooled separate accounts	34,224				—			34,224			—
Total investments	$	42,744			8,368			34,376			—
	Fair value measurements at December 31, 2013
(in thousands)	Total				(Level 1)			(Level 2)			(Level 3)
Group annuity contracts	$	180			—			180			—
Mutual funds:
Fixed income	9,210				9,210			—			—
International equity	6,316				6,316			—			—
Large U.S. equity	1,809				1,809			—			—
Small/Mid U.S. equity	1,844				1,844			—			—
Total mutual funds	19,179				19,179			—			—
Pooled separate accounts:
Fixed income	8,624				—			8,624			—
Large U.S. equity	14,509				—			14,509			—
Small/Mid U.S. equity	2,710				—			2,710			—
Total pooled separate accounts	25,843				—			25,843			—
Total investments	$	45,202			19,179			26,023			—
The Company anticipates that the long-term asset allocation on average will approximate the targeted allocation. Actual asset allocations are the result of investment decisions by a third-party investment manager.
401(k) Plan
The Bank has a 401(k) plan covering substantially all employees of the Bank. For 2014, 2013 and 2012, the Bank matched 25% of the first 6% contributed by the participants. The contribution percentage is determined by the Board of Directors in its sole discretion. The Bank’s aggregate contributions to the 401(k) Plan for 2014, 2013 and 2012 were $674,000, $587,000 and $601,000, respectively.
Supplemental Executive Retirement Plan
The Bank maintains a non-qualified supplemental retirement plan for certain senior officers of the Bank. This plan was frozen as of April 1, 2003. The Supplemental Executive Retirement Plan, which is unfunded, provides benefits in excess of the benefits permitted to be paid by the pension plan under provisions of the tax law. Amounts expensed under this supplemental retirement plan amounted to $102,000, $162,000 and $169,000 for the years 2014, 2013 and 2012, respectively. At December 31, 2014, and 2013, $2,166,000 and $2,207,000, respectively, were recorded in other liabilities on the consolidated statements of condition for this supplemental retirement plan. A decrease of $198,000, an increase of $56,000, and a decrease of $49,000, net of tax, were recorded in other comprehensive income for 2014, 2013 and 2012, respectively, in connection with this supplemental retirement plan.
Retirement Plan for the Board of Directors of The Provident Bank
The Bank maintains a Retirement Plan for the Board of Directors of the Bank, a non-qualified plan that provides cash payments for up to 10 years to eligible retired board members based on age and length of service requirements. The maximum payment under this plan to a board member, who terminates service on or after the age of 72 with at least ten years of service on the board, is forty quarterly payments of $1,250. The Bank may suspend payments under this plan if it does not meet Federal Deposit Insurance Corporation or New Jersey Department of Banking and Insurance minimum capital requirements. The Bank may terminate this plan at any time although such termination may not reduce or eliminate any benefit previously accrued to a board member without his or her consent.
The plan further provides that, in the event of a change in control (as defined in the plan), the undistributed balance of a director’s accrued benefit will be distributed to him or her within 60 days of the change in control. The Bank paid $15,000 to former board members under this plan for each of the years ended December 31, 2014, 2013 and 2012. At December 31, 2014 and 2013, $169,000 and $181,000, respectively, were recorded in other liabilities on the consolidated statements of financial condition for this retirement plan. A decrease of $7,400, an increase of $6,000, and an increase of $3,000, net of tax, were recorded in other comprehensive income for 2014, 2013 and 2012, respectively, in connection with this plan.
The plan was amended in December 2005 to terminate benefits under this plan for any directors who had less than ten years of service on the board of directors of the Bank as of December 31, 2006.
Employee Stock Ownership Plan
The ESOP is a tax-qualified plan designed to invest primarily in the Company’s common stock that provides employees with the opportunity to receive a funded retirement benefit from the Bank, based primarily on the value of the Company’s common stock. The ESOP purchased 4,769,464 shares of the Company’s common stock at an average price of $17.09 per share with the proceeds of a loan from the Company to the ESOP. The outstanding loan principal at December 31, 2014, was $53.4 million. Shares of the Company’s common stock pledged as collateral for the loan are released from the pledge for allocation to participants as loan payments are made.
For the ESOP years ending December 31, 2014 and 2013, 201,512 shares and 195,065 shares were released, respectively. Unallocated ESOP shares held in suspense totaled 2,652,045 at December 31, 2014, and had a fair value of $47.9 million. ESOP compensation expense for the years ended December 31, 2014, 2013 and 2012 was $2,654,000, $2,559,000 and $2,030,000, respectively.
The Supplemental Executive Savings Plan
The Supplemental Executive Savings Plan is a non-qualified plan that provides supplemental benefits to certain executives who are prevented from receiving the full benefits contemplated by the 401(k) Plan’s and the ESOP’s benefit formulas under tax law limits for tax-qualified plans. The Supplemental Executive Savings Plan was frozen effective December 31, 2003, and all benefit distributions have been made.
Non-Qualified Supplemental Defined Contribution Plan (“the Supplemental Employee Stock Ownership Plan”)
Effective January 1, 2004, the Bank established a deferred compensation plan for executive management and key employees of the Bank, known as The Provident Bank Non-Qualified Supplemental Employee Stock Ownership Plan (the “Supplemental ESOP”). The Supplemental ESOP was amended and restated as the Non-Qualified Supplemental Defined Contribution Plan (the “Supplemental DC Plan”), effective January 1, 2010. The Supplemental DC Plan is a non-qualified plan that provides additional benefits to certain executives whose benefits under the 401(k) Plan and ESOP are limited by tax law limitations applicable to tax-qualified plans. The Supplemental DC Plan requires a contribution by the Bank for each participant who also participates in the 401(k) Plan and ESOP equal to the amount that would have been contributed under the terms of the of the 401(k) Plan and ESOP but for the tax law limitations, less the amount actually contributed under the 401(k) Plan and ESOP.
The Supplemental DC Plan provides for a phantom stock allocation for qualified contributions that may not be accrued in the qualified ESOP and for matching contributions that may not be accrued in the qualified 401(k) Plan due to tax law limitations. Under the Supplemental 401(k) provision, the estimated expense for the year ending December 31, 2014, 2013 and 2012 was $10,500, $7,000 and $7,500, respectively, and included the matching contributions plus interest credited at an annual rate equal to the ten-year bond-equivalent yield on U.S. Treasury securities. Under the Supplemental ESOP provision, the estimated expense for the year ending December 31, 2014, 2013 and 2012 was $48,000, $45,000 and $28,000, respectively. The phantom equity is treated as equity awards (expensed at the time of allocation) and not liability awards which would require periodic adjustment to market, as participants do not have an option to take their distribution in cash.
The Amended and Restated Long-Term Incentive Plan
Upon stockholders’ approval of the Amended and Restated Long-Term Incentive Plan on April 4, 2014, shares available for stock awards and stock options under the 2008 Long-Term Equity Incentive Plan were reserved for issuance under the new Amended and Restated Long-Term Incentive Plan. No additional grants of stock awards and stock options will be made under the 2008 Long-Term Equity Incentive Plan. The new plan authorized the issuance of up to 3,686,510 shares of Company common stock with no more than 2,100,000 shares permitted to be issued as stock awards. Shares previously awarded under the 2008 plans that are subsequently forfeited or expire may also be issued under the new plan.
Stock Awards
As a general rule, restricted stock grants are held in escrow for the benefit of the award recipient until vested. Awards outstanding generally vest in three or five annual installments, commencing one year from the date of the award. Additionally, certain awards are two and three-year performance vesting awards, which may or may not vest depending upon the attainment of certain corporate financial targets. Expense attributable to stock awards amounted to $6,359,000, $4,869,000 and $3,658,000 for the years ended December 31, 2014, 2013 and 2012, respectively.
A summary status of the granted but unvested stock awards as of December 31, and changes during the year, is presented below:
	Restricted Stock Awards
	2014			2013			2012
Outstanding at beginning of year	782,213			846,883			904,411
Granted	426,726			386,669			373,510
Forfeited	(126,743	)		(68,954	)		(220,590	)
Vested	(235,734	)		(382,385	)		(210,448	)
Outstanding at the end of year	846,462			782,213			846,883
As of December 31, 2014, unrecognized compensation cost relating to unvested restricted stock totaled $1.1 million. This amount will be recognized over a remaining weighted average period of 1.1 years.
Stock Options
Each stock option granted entitles the holder to purchase one share of the Company’s common stock at an exercise price not less than the fair value of a share of the Company’s common stock at the date of grant. Options generally vest over a five-year period from the date of grant and expire no later than 10 years following the grant date. Additionally, certain options are three-year performance vesting options, which may or may not vest depending upon the attainment of certain corporate financial targets.
A summary of the status of the granted but unexercised stock options as of December 31, and changes during the year is presented below:
	2014							2013							2012
	Number			Weighted				Number			Weighted				Number			Weighted
	of			average				of			average				of			average
	stock			exercise				stock			exercise				stock			exercise
	options			price				options			price				options			price
Outstanding at beginning of year	1,233,742			$	15.24			4,152,016			$	17.5			4,248,898			$	17.37
Granted	171,935			16.44				85,250			15.23				80,081			14.86
Exercised	(9,678	)		12.11				(28,464	)		12.41				(2,000	)		12.54
Forfeited	(4,178	)		14.5				(53,444	)		10.34				(109,655	)		10.41
Expired	(107,500	)		16.54				(2,921,616	)		18.57				(65,308	)		18.32
Outstanding at the end of year	1,284,321			$	15.32			1,233,742			$	15.24			4,152,016			$	17.5
The total fair value of options vesting during 2014, 2013 and 2012 was $438,000, $696,000 and $551,000, respectively.
Compensation expense of approximately $179,000, $70,000 and $41,000 is projected for 2015, 2016 and 2017, respectively, on stock options outstanding at December 31, 2014.
The following table summarizes information about stock options outstanding at December 31, 2014:
	Options Outstanding									Options Exercisable
Range of exercise prices	Number			Average		Weighted				Number			Weighted
	of			remaining		average				of			average
	options			contractual		exercise				options			exercise
	outstanding			life		price				exercisable			price
$10.27-15.23	638,382			5.3 years		$	12.57			476,716			$	11.75
$16.38-18.87	645,939			3.6 years		$	17.67			478,504			$	18.12
The stock options outstanding and stock options exercisable at December 31, 2014 have an aggregate intrinsic value of $3,840,117 and $3,064,000, respectively.
The expense related to stock options is based on the fair value of the options at the date of the grant and is recognized ratably over the vesting period of the options.
Compensation expense related to the Company’s stock option plan totaled $298,000, $297,000 and $452,000 for 2014, 2013 and 2012, respectively.
The estimated fair values were determined on the dates of grant using the Black-Scholes Option pricing model. The fair value of the Company’ stock option awards are expensed on a straight-line basis over the vesting period of the stock option. The risk-free rate is based on the implied yield on a U.S. Treasury bond with a term approximating the expected term of the option. The expected volatility computation is based on historical volatility over a period approximating the expected term of the option. The dividend yield is based on the annual dividend payment per share, divided by the grant date stock price. The expected option term is a function of the option life and the vesting period.
The fair value of the option grants was estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted average assumptions:
	For the year ended December 31,
	2014			2013			2012
Expected dividend yield	3.66	%		3.41	%		3.26	%
Expected volatility	20.04	%		33.38	%		32.51	%
Risk-free interest rate	0.96	%		0.88	%		0.86	%
Expected option life	6.5 years			8 years			8 years
The weighted average fair value of options granted during 2014, 2013 and 2012 was $1.64, $3.49 and $3.37 per option, respectively.

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes
	The current and deferred amounts of income tax expense (benefit) for the years ended December 31, 2014, 2013 and 2012 are as follows (in thousands):
		Years ended December 31,
		2014			2013		2012
	Current:
	Federal	$	27,577		27,667		29,813
	State	542			2,168		176
	Total current	28,119			29,835		29,989
	Deferred:
	Federal	1,678			4,210		(3,208	)
	State	1,988			1,321		2,074
	Total deferred	3,666			5,531		(1,134	)
		$	31,785		35,366		28,855
	The Bank recorded, in accumulated other comprehensive income, deferred tax expense (benefit) of $7,075,000, ($13,824,000) and $587,000 during 2014, 2013 and 2012, respectively, to reflect the tax effect of the unrealized gain on securities available for sale. The Bank recorded, in accumulated other comprehensive income, a deferred tax expense (benefit) of $(3,800,000), $4,968,000 and ($694,000) in 2014, 2013 and 2012, respectively, related to the amortization of post-retirement obligations.
	A reconciliation between the amount of reported total income tax expense and the amount computed by multiplying the applicable statutory income tax rate is as follows (in thousands):
		Years ended December 31,
		2014			2013		2012
	Tax expense at statutory rate of 35%	$	36,896		37,065		33,643
	Increase (decrease) in taxes resulting from:
	State tax, net of federal income tax benefit	1,621			2,268		1,462
	Tax-exempt interest income	(4,916		)	(4,084	)	(3,937	)
	Bank-owned life insurance	(1,972		)	(2,309	)	(1,847	)
	Non-qualified stock option expiration	—			2,746		—
	Other, net	156			(320	)	(466	)
		$	31,785		35,366		28,855
	The net deferred tax asset is included in other assets in the consolidated statements of financial condition. The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities at December 31, 2014 and 2013 are as follows (in thousands):
		2014			2013
	Deferred tax assets:
	Allowance for loan losses	$	24,160		25,848
	Post-retirement benefit	10,658			10,690
	Deferred compensation	3,009			3,037
	Intangibles	499			511
	Purchase accounting adjustments	387			426
	Depreciation	3,963			3,396
	SERP	949			958
	ESOP	3,264			3,253
	Stock-based compensation	5,734			5,558
	Non-accrual interest	5,202			6,756
	Unrealized loss on securities	—			1,939
	State NOL	430			237
	Federal NOL	1,376			1,692
	Pension liability adjustments	5,178			1,438
	Other	1,073			1,345
	Total gross deferred tax assets	65,882			67,084
	Valuation Reserve	(242		)	(242	)
	Deferred tax liabilities:
	Pension expense	9,925			9,925
	Deferred loan costs	4,089			3,936
	Investment securities, principally due to accretion of discounts	311			235
	Originated mortgage servicing rights	395			447
	Unrealized gain on securities	5,191			—
	Total gross deferred tax liabilities	19,911			14,543
	Net deferred tax asset	$	45,729		52,299
	The 2014 deferred tax expense does not equal the change in net deferred tax assets as a result of deferred taxes recorded in connection with the Team Capital acquisition in the amount of $486,000.
	Retained earnings at December 31, 2014 includes approximately $51,800,000 for which no provision for income tax has been made. This amount represented an allocation of income to bad debt deductions for tax purposes only. Events that would result in taxation of these reserves include the failure to qualify as a bank for tax purposes, distributions in complete or partial liquidation, stock redemptions and excess distributions to stockholders. At December 31, 2014, the Company had an unrecognized tax liability of $21,160,000 with respect to this reserve.
	At December 31, 2014 and 2013, the Company had a valuation allowance of $242,000 related to approximately $648,000 of capital loss carryforwards. As a result of the Beacon acquisition in 2011, the Company acquired federal net operating loss carryforwards. There are approximately $3,900,000 available to offset future taxable income as of December 31, 2014. If not utilized, these carryforwards will expire in 2030. Also, the Company New Jersey NOL carryforwards in the amount of $3,300,000 which are scheduled to expire in 2033 and Pennsylvania NOL carryforwards in the amount of $3,000,000, which are set to expire in 2016. The federal NOLs are subject to a combined annual Code Section 382 limitation in the amount of approximately $900,000. Management has determined that it is more likely than not that it will realize the net deferred tax asset based upon the nature and timing of the items listed above. In order to fully realize the net deferred tax asset, the Company will need to generate future taxable income. Management has projected that the Company will generate sufficient taxable income to utilize the net deferred tax asset; however, there can be no assurance that such levels of taxable income will be generated.
	The Company’s policy is to report interest and penalties, if any, related to unrecognized tax benefits in income tax expense. The Company did not have any liabilities for uncertain tax positions or any known unrecognized tax benefits at December 31, 2014 and 2013.
	The Company and its subsidiaries file a consolidated U.S. Federal income tax return and each entity files a separate state income tax return. The Company and its subsidiaries are no longer subject to income tax examinations by taxing authorities for years prior to 2011.

Lease_Commitments

Lease Commitments	12 Months Ended
	Dec. 31, 2014
Leases [Abstract]
Lease Commitments	Lease Commitments
	The approximate future minimum rental commitments, exclusive of taxes and other related charges, for all significant non-cancellable operating leases at December 31, 2014, are summarized as follows (in thousands):
	Year ending December 31,
	2015	$	6,521
	2016	6,455
	2017	5,960
	2018	5,351
	2019	5,093
	Thereafter	12,887
		$	42,267
	Rental expense was $8,056,000, $6,850,000 and $7,115,000 for the years ended December 31, 2014, 2013 and 2012, respectively.

Commitments_Contingencies_and_

Commitments, Contingencies and Concentrations of Credit Risk	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Commitments, Contingencies and Concentrations of Credit Risk	Commitments, Contingencies and Concentrations of Credit Risk
	In the normal course of business, various commitments and contingent liabilities are outstanding which are not reflected in the accompanying consolidated financial statements. In the opinion of management, the consolidated financial position of the Company will not be materially affected by the outcome of such commitments or contingent liabilities.
	A substantial portion of the Bank’s loans are one- to four-family residential first mortgage loans secured by real estate located in New Jersey. Accordingly, the collectability of a substantial portion of the Bank’s loan portfolio and the recovery of a substantial portion of the carrying amount of other real estate owned are susceptible to changes in local real estate market conditions.

Regulatory_Capital_Requirement

Regulatory Capital Requirements	12 Months Ended
	Dec. 31, 2014
Banking and Thrift [Abstract]
Regulatory Capital Requirements	Regulatory Capital Requirements
	FDIC regulations require banks to maintain minimum levels of regulatory capital. Under the regulations in effect at December 31, 2014 and 2013, the Bank is required to maintain (i) a minimum leverage ratio of Tier 1 capital to total adjusted assets of 4.00%, and (ii) minimum ratios of Tier 1 and total capital to risk-weighted assets of 4.00% and 8.00%, respectively. Under its prompt corrective action regulations, the FDIC is required to take certain supervisory actions (and may take additional discretionary actions) with respect to an undercapitalized institution. Such actions could have a direct material effect on an institution’s financial statements. The regulations establish a framework for the classification of savings institutions into five categories: well capitalized, adequately capitalized, undercapitalized, significantly undercapitalized, and critically undercapitalized. Generally, an institution is considered well capitalized if it has a leverage (Tier 1) capital ratio of at least 5.00%; a Tier 1 risk-based capital ratio of at least 6.00%; and a total risk-based capital ratio of at least 10.00%.
	The foregoing capital ratios are based in part on specific quantitative measures of assets, liabilities and certain off-balance sheet items as calculated under regulatory accounting practices. Capital amounts and classifications are also subject to qualitative judgments by the FDIC about capital components, risk weightings and other factors.
	As of December 31, 2014 and 2013, the Bank exceeded all minimum capital adequacy requirements to which it is subject. Further, the most recent FDIC notification categorized the Bank as a well-capitalized institution under the prompt corrective action regulations. There have been no conditions or events since that notification that management believes have changed the Bank’s capital classification.
	The Company is regulated as a bank holding company, and as such, is subject to examination, regulation and periodic reporting under the Bank Holding Company Act, as administered by the Federal Reserve Board (“FRB”). The FRB has adopted capital adequacy guidelines for bank holding companies on a consolidated basis substantially similar to those of the FDIC for the Bank. As of December 31, 2014 and 2013, the Company was “well capitalized” under FRB guidelines. Regulations of the FRB provide that a bank holding company must serve as a source of strength to any of its subsidiary banks and must not conduct its activities in an unsafe or unsound manner. Under the prompt corrective action provisions discussed above, a bank holding company parent of an undercapitalized subsidiary bank would be directed to guarantee, within limitations, the capital restoration plan that is required of such an undercapitalized bank. If the undercapitalized bank fails to file an acceptable capital restoration plan or fails to implement an accepted plan, the FRB may prohibit the bank holding company parent of the undercapitalized bank from paying any dividend or making any other form of capital distribution without the prior approval of the FRB.
	The following is a summary of the Company’s actual capital amounts and ratios as of December 31, 2014 and 2013, compared to the FRB minimum capital adequacy requirements and the FRB requirements for classification as a well-capitalized institution (dollars in thousands).
		Actual				FRB minimum capital				To be well-capitalized
						adequacy requirements				under prompt corrective
										action provisions
		Amount		Ratio		Amount		Ratio		Amount		Ratio
	As of December 31, 2014:
	Leverage (Tier 1)	$	740,958	9.21	%	$	321,809	4	%	$	402,262	5	%
	Risk-based capital:
	Tier 1	740,958		12.06		245,859		4		368,788		6
	Total	802,692		13.06		491,717		8		614,646		10
		Actual				FRB minimum capital				To be well-capitalized
						adequacy requirements				under prompt corrective
										action provisions
		Amount		Ratio		Amount		Ratio		Amount		Ratio
	As of December 31, 2013:
	Leverage (Tier 1)	$	660,549	9.42	%	$	280,572	4	%	$	350,715	5	%
	Risk-based capital:
	Tier 1	660,549		12.89		204,967		4		307,451		6
	Total	724,609		14.14		409,934		8		512,418		10
	The following is a summary of the Bank’s actual capital amounts and ratios as of December 31, 2014 and 2013, compared to the FDIC minimum capital adequacy requirements and the FDIC requirements for classification as a well-capitalized institution (dollars in thousands).
		Actual				FDIC minimum capital				To be well-capitalized
						adequacy requirements				under prompt corrective
										action provisions
		Amount		Ratio		Amount		Ratio		Amount		Ratio
	As of December 31, 2014:
	Leverage (Tier 1)	$	674,483	8.38	%	$	321,805	4	%	$	402,257	5	%
	Risk-based capital:
	Tier 1	674,483		10.97		245,853		4		368,779		6
	Total	736,217		11.98		491,705		8		614,631		10
		Actual				FDIC minimum capital				To be well-capitalized
						adequacy requirements				under prompt corrective
										action provisions
		Amount		Ratio		Amount		Ratio		Amount		Ratio
	As of December 31, 2013:
	Leverage (Tier 1)	$	585,313	8.34	%	$	280,578	4	%	$	350,723	5	%
	Risk-based capital:
	Tier 1	585,313		11.42		204,967		4		307,450		6
	Total	649,373		12.67		409,933		8		512,417		10

Fair_Value_Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements
	The Company utilizes fair value measurements to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures. The determination of fair values of financial instruments often requires the use of estimates. Where quoted market values in an active market are not readily available, the Company utilizes various valuation techniques to estimate fair value.
	Fair value is an estimate of 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. However, in many instances fair value estimates may not be substantiated by comparison to independent markets and may not be realized in an immediate sale of the financial instrument.
	GAAP establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). The three levels of fair value hierarchy are as follows:
	Level 1:	Unadjusted quoted market prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities;
	Level 2:	Quoted prices in markets that are not active, or inputs that are observable either directly or indirectly, for substantially the full term of the asset or liability; and
	Level 3:	Prices or valuation techniques that require inputs that are both significant to the fair value measurement and unobservable (i.e., supported by little or no market activity).
	A financial instrument’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement.
	The valuation techniques are based upon the unpaid principal balance only, and exclude any accrued interest or dividends at the measurement date. Interest income and expense and dividend income are recorded within the consolidated statements of income depending on the nature of the instrument using the effective interest method based on acquired discount or premium.
	Assets Measured at Fair Value on a Recurring Basis
	The valuation techniques described below were used to measure fair value of financial instruments in the table below on a recurring basis as of December 31, 2014 and December 31, 2013.
	Securities Available for Sale
	For securities available for sale, fair value was estimated using a market approach. he majority of the Company’s securities are fixed income instruments that are not quoted on an exchange, but are traded in active markets. Prices for these instruments are obtained through third party data service providers or dealer market participants with which the Company has historically transacted both purchases and sales of securities. Prices obtained from these sources include market quotations and matrix pricing. Matrix pricing, a Level 2 input, is a mathematical technique used principally to value certain securities to benchmark or to comparable securities. The Company evaluates the quality of Level 2 matrix pricing through comparison to similar assets with greater liquidity and evaluation of projected cash flows. As the Company is responsible for the determination of fair value, it performs quarterly analyses on the prices received from the pricing service to determine whether the prices are reasonable estimates of fair value. Specifically, the Company compares the prices received from the pricing service to a secondary pricing source. Additionally, the Company compares changes in the reported market values and returns to relevant market indices to test the reasonableness of the reported prices. The Company’s internal price verification procedures and review of fair value methodology documentation provided by independent pricing services has not historically resulted in adjustment in the prices obtained from the pricing service. The Company also may hold equity securities and debt instruments issued by the U.S. government and U.S. government-sponsored agencies that are traded in active markets with readily accessible quoted market prices that are considered Level 1 inputs.
	Derivatives
	The Company records all derivatives on the balance sheet at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether the Company has elected to designate a derivative in a hedging relationship and apply hedge accounting and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. Currently, none of the Company’s derivatives are designated in qualifying hedging relationships. The existing interest rate derivatives result from a service provided to certain qualifying borrowers in a loan related transaction and, therefore, are not used to manage interest rate risk in the Company’s assets or liabilities. As such, all changes in fair value of the Company’s derivatives are recognized directly in earnings. The fair value of the Company's derivatives are determined using discounted cash flow analysis using observable market-based inputs, which are considered Level 2 inputs.
	Assets Measured at Fair Value on a Non-Recurring Basis
	The valuation techniques described below were used to estimate fair value of financial instruments measured on a non-recurring basis as of December 31, 2014 and 2013.
	Collateral Dependent Impaired Loans
	For loans measured for impairment based on the fair value of the underlying collateral, fair value was estimated using a market approach. The Company measures the fair value of collateral underlying impaired loans primarily through obtaining independent appraisals that rely upon quoted market prices for similar assets in active markets. These appraisals include adjustments, on an individual case-by-case basis, to comparable assets based on the appraisers’ market knowledge and experience, as well as adjustments for estimated costs to sell of up to 6%. The Company classifies these loans as Level 3 within the fair value hierarchy.
	Foreclosed Assets
	Assets acquired through foreclosure or deed in lieu of foreclosure are carried at fair value, less estimated costs to sell of up to 6%. Fair value is generally based on independent appraisals that rely upon quoted market prices for similar assets in active markets. These appraisals include adjustments, on an individual case basis, to comparable assets based on the appraisers’ market knowledge and experience, and are classified as Level 3. When an asset is acquired, the excess of the loan balance over fair value, less estimated costs to sell, is charged to the allowance for loan losses. A reserve for foreclosed assets may be established to provide for possible write-downs and selling costs that occur subsequent to foreclosure. Foreclosed assets are carried net of the related reserve. Operating results from real estate owned, including rental income, operating expenses, and gains and losses realized from the sales of real estate owned, are recorded as incurred.
	There were no changes to the valuation techniques for fair value measurements during the years ended December 31, 2014 and 2013.
	The following tables present the assets and liabilities reported on the consolidated statements of financial condition at their fair value as of December 31, 2014 and 2013, by level within the fair value hierarchy (in thousands).
				Fair Value Measurements at Reporting Date Using:
		December 31,		Quoted Prices in	Significant Other	Significant
		2014		Active Markets for	Observable	Unobservable
				Identical Assets	Inputs (Level 2)	Inputs
				(Level 1)		(Level 3)
	Measured on a recurring basis:
	U.S. Treasury obligations	$	8,016	8,016	—	—
	Agency obligations	95,076		95,076	—	—
	Mortgage-backed securities	957,257		—	957,257	—
	State and municipal obligations	7,002		—	7,002	—
	Corporate obligations	6,520			6,520
	Equities	524		524	—	—
		$	1,074,395	103,616	970,779	—
	Asset derivatives	$	2,046	—	2,046
		$	1,076,441	103,616	972,825	—
	Liability derivatives	$	2,052		2,052
	Measured on a non-recurring basis:
	Loans measured for impairment based on the fair value of the underlying collateral	$	23,086	—	—	23,086
	Foreclosed assets	5,098		—	—	5,098
		$	28,184	—	—	28,184
				Fair Value Measurements at Reporting Date Using:
		December 31,		Quoted Prices in	Significant Other	Significant
		2013		Active Markets for	Observable	Unobservable
				Identical Assets	Inputs (Level 2)	Inputs
				(Level 1)		(Level 3)
	Measured on a recurring basis:
	Agency obligations	$	93,416	93,416	—	—
	Mortgage-backed securities	1,054,974		—	1,054,974	—
	State and municipal obligations	8,758		—	8,758	—
	Equities	446		446	—	—
		$	1,157,594	93,862	1,063,732	—
	Measured on a non-recurring basis:
	Loans measured for impairment based on the fair value of the underlying collateral	$	29,782	—	—	29,782
	Foreclosed assets	5,486		—	—	5,486
		$	35,268	—	—	35,268
	There were no transfers between Level 1 and Level 2 during the years ended December 31, 2014 and 2013.
	Other Fair Value Disclosures
	The Company is required to disclose estimated fair value of financial instruments, both assets and liabilities on and off the balance sheet, for which it is practicable to estimate fair value. The following is a description of valuation methodologies used for those assets and liabilities.
	Cash and Cash Equivalents
	For cash and due from banks, federal funds sold and short-term investments, the carrying amount approximates fair value.
	Investment Securities Held to Maturity
For investment securities held to maturity, fair value was estimated using a market approach. The majority of the Company’s securities are fixed income instruments that are not quoted on an exchange, but are traded in active markets. Prices for these instruments are obtained through third party data service providers or dealer market participants with which the Company has historically transacted both purchases and sales of securities. Prices obtained from these sources include market quotations and matrix pricing. Matrix pricing, a Level 2 input, is a mathematical technique used principally to value certain securities to benchmark or comparable securities. The Company evaluates the quality of Level 2 matrix pricing through comparison to similar assets with greater liquidity and evaluation of projected cash flows. As the Company is responsible for the determination of fair value, it performs quarterly analyses on the prices received from the pricing service to determine whether the prices are reasonable estimates of fair value. Specifically, the Company compares the prices received from the pricing service to a secondary pricing source. Additionally, the Company compares changes in the reported market values and returns to relevant market indices to test the reasonableness of the reported prices. The Company’s internal price verification procedures and review of fair value methodology documentation provided by independent pricing services has not historically resulted in adjustment in the prices obtained from the pricing service. The Company also holds debt instruments issued by the U.S. government and U.S. government agencies that are traded in active markets with readily accessible quoted market prices that are considered Level 1 within the fair value hierarchy.
FHLBNY Stock
The carrying value of FHLBNY stock was its cost. The fair value of FHLBNY stock is based on redemption at par value. The Company classifies the estimated fair value as Level 1 within the fair value hierarchy.
Loans
Fair values are estimated for portfolios of loans with similar financial characteristics. Loans are segregated by type such as commercial mortgage, residential mortgage, commercial, construction and consumer. Each loan category is further segmented into fixed and adjustable rate interest terms and into performing and non-performing categories. The fair value of performing loans was estimated using a combination of techniques, including a discounted cash flow model that utilizes a discount rate that reflects the Company’s current pricing for loans with similar characteristics and remaining maturity, adjusted by an amount for estimated credit losses inherent in the portfolio at the balance sheet date. The rates take into account the expected yield curve, as well as an adjustment for prepayment risk, when applicable. The Company classifies the estimated fair value of its loan portfolio as Level 3.
The fair value for significant non-performing loans was based on recent external appraisals of collateral securing such loans, adjusted for the timing of anticipated cash flows. The Company classifies the estimated fair value of its non-performing loan portfolio as Level 3.
Deposits
The fair value of deposits with no stated maturity, such as non-interest bearing demand deposits and savings deposits, was equal to the amount payable on demand and classified as Level 1. The estimated fair value of certificates of deposit was based on the discounted value of contractual cash flows. The discount rate was estimated using the Company’s current rates offered for deposits with similar remaining maturities. The Company classifies the estimated fair value of its certificates of deposit portfolio as Level 2.
Borrowed Funds
The fair value of borrowed funds was estimated by discounting future cash flows using rates available for debt with similar terms and maturities and is classified by the Company as Level 2 within the fair value hierarchy.
Commitments to Extend Credit and Letters of Credit
The fair value of commitments to extend credit and letters of credit was estimated using the fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements and the present creditworthiness of the counterparties. For fixed rate loan commitments, fair value also considers the difference between current levels of interest rates and the committed rates. The fair value estimates of commitments to extend credit and letters of credit are deemed immaterial.
Limitations
Fair value estimates are made at a specific point in time, based on relevant market information and information about the financial instrument. These estimates do not reflect any premium or discount that could result from offering for sale at one time the Company’s entire holdings of a particular financial instrument. Because no market exists for a significant portion of the Company’s financial instruments, fair value estimates are based on judgments regarding future expected loss experience, current economic conditions, risk characteristics of various financial instruments, and other factors. These estimates are subjective in nature and involve uncertainties and matters of significant judgment and, therefore, cannot be determined with precision. Changes in assumptions could significantly affect the estimates.
Fair value estimates are based on existing on- and off-balance sheet financial instruments without attempting to estimate the value of anticipated future business and the value of assets and liabilities that are not considered financial instruments.
Significant assets and liabilities that are not considered financial assets or liabilities include goodwill and other intangibles, deferred tax assets and premises and equipment. In addition, the tax ramifications related to the realization of the unrealized gains and losses can have a significant effect on fair value estimates and have not been considered in the estimates.
The following tables present the Company’s financial instruments at their carrying and fair values as of December 31, 2014 and December 31, 2013. Fair values are presented by level within the fair value hierarchy.
			Fair Value Measurements at December 31, 2014 Using:
(Dollars in thousands)	Carrying		Fair	Quoted Prices in	Significant Other	Significant
	value		value	Active Markets for	Observable Inputs	Unobservable
				Identical Assets	(Level 2)	Inputs
				(Level 1)		(Level 3)
Financial assets:
Cash and cash equivalents	$	103,762	103,762	103,762	—	—
Securities available for sale:
U.S. Treasury obligations	8,016		8,016	8,016	—	—
Agency obligations	95,076		95,076	95,076	—	—
Mortgage-backed securities	957,257		957,257	—	957,257	—
State and municipal obligations	7,002		7,002	—	7,002	—
Corporate obligations	6,520		6,520	—	6,520	—
Equity securities	524		524	524	—	—
Total securities available for sale	$	1,074,395	1,074,395	103,616	970,779	—
Investment securities held to maturity:
Agency obligations	$	6,813	6,810	6,810	—	—
Mortgage-backed securities	2,816		2,939	—	2,939	—
State and municipal obligations	449,410		462,238	—	462,238	—
Corporate obligations	10,489		10,486	—	10,486	—
Total securities held to maturity	$	469,528	482,473	6,810	475,663	—
FHLBNY stock	69,789		69,789	69,789	—	—
Loans, net of allowance for loan losses	6,023,771		6,104,558	—	—	6,104,558
Asset derivative	2,046		2,046		2,046
Financial liabilities:
Deposits other than certificates of deposits	$	4,966,834	4,966,834	4,966,834	—	—
Certificates of deposit	825,689		830,233	—	830,233	—
	5,792,523		5,797,067	4,966,834	830,233	—
Borrowings	$	1,509,851	1,516,966	—	1,516,966	—
Liability derivative	2,052		2,052		2,052
			Fair Value Measurements at December 31, 2013 Using:
(Dollars in thousands)	Carrying		Fair	Quoted Prices in	Significant Other	Significant
	value		value	Active Markets for	Observable Inputs	Unobservable
				Identical Assets	(Level 2)	Inputs
				(Level 1)		(Level 3)
Financial assets:
Cash and cash equivalents	$	101,224	101,224	101,224	—	—
Securities available for sale:
Agency obligations	93,416		93,416	93,416	—	—
Mortgage-backed securities	1,054,974		1,054,974	—	1,054,974	—
State and municipal obligations	8,758		8,758	—	8,758	—
Equity securities	446		446	446	—	—
Total securities available for sale	$	1,157,594	1,157,594	93,862	1,063,732	—
Investment securities held to maturity:
Agency obligations	$	7,523	7,470	7,470	—	—
Mortgage-backed securities	5,273		5,520	—	5,520	—
State and municipal obligations	334,750		332,987	—	332,987	—
Corporate obligations	9,954		9,936	—	9,936	—
Total securities held to maturity	$	357,500	355,913	7,470	348,443	—
FHLBNY stock	58,070		58,070	58,070	—	—
Loans, net of allowance for loan losses	5,130,149		5,221,228	—	—	5,221,228
Financial liabilities:
Deposits other than certificates of deposits	$	4,395,717	4,395,717	4,395,717	—	—
Certificates of deposit	806,754		813,337	—	813,337	—
Total deposits	$	5,202,471	5,209,054	4,395,717	813,337	—
Borrowings	$	1,203,879	1,218,136	—	1,218,136	—

Selected_Quarterly_Financial_D

Selected Quarterly Financial Data (Unaudited)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Selected Quarterly Financial Data (Unaudited)	Selected Quarterly Financial Data (Unaudited)
	The following tables are a summary of certain quarterly financial data for the years ended December 31, 2014 and 2013.
		2014 Quarters Ended
		March 31		June 30			September 30			December 31
		(In thousands, except per share data)
	Interest income	$	64,523	$	67,386		$	73,652		$	73,800
	Interest expense	9,322		9,985			10,683			10,482
	Net interest income	55,201		57,401			62,969			63,318
	Provision for loan losses	400		1,500			1,500			1,250
	Net interest income after provision for loan losses	54,801		55,901			61,469			62,068
	Non-interest income	8,116		10,327			11,309			11,416
	Non-interest expense	38,190		43,671			45,833			42,297
	Income before income tax expense	24,727		22,557			26,945			31,187
	Income tax expense	7,698		6,206			7,913			9,968
	Net income	$	17,029	$	16,351		$	19,032		$	21,219
	Basic earnings per share	$	0.3	$	0.28		$	0.3		$	0.34
	Diluted earnings per share	$	0.3	$	0.28		$	0.3		$	0.34
		2013 Quarter Ended
		March 31		June 30		September 30			December 31
		(In thousands, except per share data)
	Interest income	$	63,304	62,413		62,984			64,076
	Interest expense	9,409		9,002		8,987			9,369
	Net interest income	53,895		53,411		53,997			54,707
	Provision for loan losses	1,500		1,000		1,200			1,800
	Net interest income after provision for loan losses	52,395		52,411		52,797			52,907
	Non-interest income	9,945		12,637		11,730			9,841
	Non-interest expense	36,946		37,813		36,464			37,540
	Income before income tax expense	25,394		27,235		28,063			25,208
	Income tax expense	7,566		8,007		11,987			7,806
	Net income	$	17,828	19,228		16,076			17,402
	Basic earnings per share	$	0.31	0.34		0.28			0.3
	Diluted earnings per share	$	0.31	0.34		0.28			0.3

Earnings_Per_Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share
	The following is a reconciliation of the outstanding shares used in the basic and diluted earnings per share calculations.
	(Dollars in thousands, except per share data)	For the Year Ended December 31,
		2014		2013	2012
	Net income	$	73,631	70,534	67,267
	Basic weighted average common shares outstanding	60,388,398		57,236,909	57,145,868
	Plus:
	Dilutive shares	173,672		124,534	53,936
	Diluted weighted average common shares outstanding	60,562,070		57,361,443	57,199,804
	Earnings per share:
	Basic	$	1.22	1.23	1.18
	Diluted	$	1.22	1.23	1.18
	Anti-dilutive stock options and awards totaling 988,931, 659,531 and 3,891,443 shares at December 31, 2014, 2013 and 2012, respectively, were excluded from the earnings per share calculations.

Parentonly_Financial_Informati

Parent-only Financial Information	12 Months Ended
	Dec. 31, 2014
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Parent-only Financial Information	Parent-only Financial Information
	The condensed financial statements of Provident Financial Services, Inc. (parent company only) are presented below:
	PROVIDENT FINANCIAL SERVICES, INC.
	Condensed Statements of Financial Condition
	(Dollars in Thousands)
		December 31,			December 31,
		2014			2013
	Assets
	Cash and due from banks	$	10,475		$	12,796
	Securities available for sale, at fair value	524			446
	Investment in subsidiary	1,077,624			935,517
	Due from subsidiary—SAP	2,794			6,269
	ESOP loan	53,438			56,716
	Other assets	34			59
	Total assets	$	1,144,889		$	1,011,803
	Liabilities and Stockholders’ Equity
	Other liabilities	790			1,050
	Total stockholders’ equity	1,144,099			1,010,753
	Total liabilities and stockholders’ equity	$	1,144,889		$	1,011,803
	PROVIDENT FINANCIAL SERVICES, INC.
	Condensed Statements of Operations
	(Dollars in Thousands)
		For the Years Ended December 31,
		2014			2013		2012
	Dividends from subsidiary	$	36,118		32,320		40,729
	Interest income	2,276			2,390		2,696
	Investment gain	11			9		9
	Total income	38,405			34,719		43,434
	Non-interest expense	814			891		882
	Total expense	814			891		882
	Income before income tax expense	37,591			33,828		42,552
	Income tax expense	551			563		688
	Income before undistributed net income of subsidiary	37,040			33,265		41,864
	Equity in undistributed net income of subsidiary	36,591			37,269		25,403
	(dividends in excess of earnings)
	Net income	$	73,631		70,534		67,267
	PROVIDENT FINANCIAL SERVICES, INC.
	Condensed Statements of Cash Flows
	(Dollars in Thousands)
		For the Years Ended December 31,
		2014			2013		2012
	Cash flows from operating activities:
	Net income	$	73,631		70,534		67,267
	Adjustments to reconcile net income to net cash provided by operating activities
	Dividends in excess of earnings (equity in undistributed net income) of subsidiary	(36,591		)	(37,269	)	(25,403	)
	ESOP allocation	2,654			2,559		2,030
	SAP allocation	6,359			4,869		3,658
	Stock option allocation	298			297		452
	Decrease in due from subsidiary—SAP	3,475			5,814		4,177
	Increase (decrease) in other assets	15,454			(6,912	)	(13,960	)
	(Decrease) increase in other liabilities	(259		)	(172	)	68
	Net cash provided by operating activities	65,021			39,720		38,289
	Cash flows from investing activities:
	Cash consideration paid for business acquisition	(31,562		)	—		—
	Net decrease in ESOP loan	3,278			3,034		3,035
	Net cash (used in) provided by investing activities	(28,284		)	3,034		3,035
	Cash flows from financing activities:
	Purchases of treasury stock	(4,420		)	(5,899	)	(9,424	)
	Cash dividends paid	(36,118		)	(32,320	)	(40,729	)
	Shares issued dividend reinvestment plan	1,336			1,186		6,090
	Stock options exercised	144			412		28
	Net cash used in financing activities	(39,058		)	(36,621	)	(44,035	)
	Net (decrease) increase in cash and cash equivalents	(2,321		)	6,133		(2,711	)
	Cash and cash equivalents at beginning of period	12,796			6,663		9,374
Cash and cash equivalents at end of period	$	10,475		12,796		6,663

Other_Comprehensive_Income_Los

Other Comprehensive Income (Loss)	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Other Comprehensive Income (Loss)	Other Comprehensive Income (Loss)
	The following table presents the components of other comprehensive income (loss) both gross and net of tax, for the years ended December 31, 2014, 2013 and 2012 (in thousands):
		For the Years Ended December 31,
		2014										2013									2012
		Before				Tax			After			Before			Tax			After			Before		Tax		After
		Tax				Effect			Tax			Tax			Effect			Tax			Tax		Effect		Tax
	Components of Other Comprehensive Income(Loss):
	Unrealized gains and losses on securities available for sale:
	Net gains (losses) arising during the period	$	17,868			(7,176	)		10,692			(32,845	)		13,417			(19,428	)		3,060		(1,250	)	1,810
	Reclassification adjustment for gains included in net income	(251		)		101			(150	)		(996	)		407			(589	)		(4,497	)	1,837		(2,660	)
	Total	17,617				(7,075	)		10,542			(33,841	)		13,824			(20,017	)		(1,437	)	587		(850	)
	Other-than-temporary impairment on debt securities available for sale:
	Other-than-temporary impairment losses on securities	—				—			—			—			—			—			—		—		—
	Reclassification adjustment for impairment losses included in net income	—				—			—			434			(177	)		257			—		—		—
	Total	—				—			—			434			(177	)		257			—		—		—
	Amortization related to post retirement obligations	(9,462		)		3,800			(5,662	)		12,161			(4,968	)		7,193			(1,699	)	694		(1,005	)
	Total other comprehensive income (loss)	$	8,155			(3,275	)		4,880			(21,246	)		8,679			(12,567	)		(3,136	)	1,281		(1,855	)
	The following table presents the changes in the components of accumulated other comprehensive income, net of tax, for the years ended December 31, 2014 and 2013 (in thousands):
			Changes in Accumulated Other Comprehensive Income by Component, net of tax
			For the Years Ended December 31,
			2014										2013
			Unrealized				Post  Retirement			Accumulated			Unrealized			Post  Retirement			Accumulated
			Gains on Securities				Obligations			Other			Gains on Securities			Obligations			Other
			Available for							Comprehensive			Available for						Comprehensive
			Sale							Income			Sale						Income
	Balance at the beginning of the period,		$	(2,799	)		(2,052	)		(4,851	)		16,961			(9,245	)		7,716
	Current period change in other comprehensive income (loss)		10,542				(5,662	)		4,880			(19,760	)		7,193			(12,567	)
	Balance at the end of the period		$	7,743			(7,714	)		29			(2,799	)		(2,052	)		(4,851	)
	The following table summarizes the reclassifications out of accumulated other comprehensive income for the years ended December 31, 2014 and 2013(in thousands):
			Reclassifications Out of Accumulated Other Comprehensive
			Income
			Amount reclassified from AOCI for the years ended December 31,							Affected line item in the Consolidated
			2014				2013			Statement of Income
	Details of AOCI:
	Securities available for sale:
	Realized net gains on the sale of securities available for sale		$	251			996			Net gain on securities transactions
			(101		)		(407	)		Income tax expense
			150				589			Net of tax
	Realized other-than-temporary impairment losses securities available for sale		—				(434	)		Net impairment losses on securities recognized in earnings
			—				177			Income tax expense
			—				(257	)		Net of tax
	Post retirement obligations:
	Amortization of actuarial losses		237				1,367			Compensation and employee benefits (1)
			(95		)		(558	)		Income tax expense
			142				809			Net of tax
	Realized loss related to lump sum pension settlement		(1,336		)		—			Compensation and employee benefits (1)
			546				—			Income tax expense
			(790		)		—			Net of tax
	Total reclassifications		$	(498	)		1,141			Net of tax
	(1) This item is included in the computation of net periodic benefit cost. See Note 11. Benefit Plans

Derivative_and_Hedging_Activit

Derivative and Hedging Activities (Notes)	12 Months Ended
	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities Disclosure	Derivative and Hedging Activities
	The Company is exposed to certain risks arising from both its business operations and economic conditions. The Company principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. The Company manages economic risks, including interest rate, liquidity, and credit risk, primarily by managing the amount, sources, and duration of its assets and liabilities. The Company’s existing interest rate derivatives result from a service provided to certain qualifying borrowers in a loan related transaction and, therefore, are not used to manage interest rate risk in the Company’s assets or liabilities. The Company manages a matched book with respect to its derivative instruments in order to minimize its net risk exposure resulting from such transactions.
	The table below presents the fair value of the Company’s derivative financial instruments as well as their classification on the Consolidated Statements of Financial Condition as of December 31, 2014 (in thousands):
		As of December 31, 2014
		Asset Derivatives				Liability Derivatives
		Consolidated Statements of Financial Condition	Fair			Consolidated Statements of Financial Condition	Fair
			Value				Value
	Derivatives not designated as a hedging instruments:
	Interest rate products	Other assets	$	2,040		Other liabilities	$	2,052
	Credit contracts	Other assets	6				—
	Total derivatives not designated as hedging instruments		$	2,046			$	2,052
	None of the Company’s derivatives are designated in qualifying hedging relationships. Derivatives not designated as hedges are not speculative and result from a service the Company provides to certain customers, which the Company implemented during 2014. The Company executes interest rate swaps with commercial banking customers to facilitate their respective risk management strategies. Those interest rate swaps are simultaneously hedged by offsetting interest rate swaps that the Company executes with a third party, such that the Company minimizes its net risk exposure resulting from such transactions. As the interest rate swaps associated with this program do not meet the strict hedge accounting requirements, changes in the fair value of both the customer swaps and the offsetting swaps are recognized directly in earnings. As of December 31, 2014, the Company had nine interest rate swaps with an aggregate notional amount of $94.9 million related to this program.
	The tables below present the effect of the Company’s derivative financial instruments on the Consolidated Statements of Income for the year ended December 31, 2014 (in thousands).
			Gain (loss) recognized in Income on derivatives
		Consolidated Statements of Income	Year ended
			31-Dec-14
	Derivatives not designated as a hedging instruments:
	Interest rate products	Other income	$	(3	)
	Credit contracts	Other income	6
	Total		$	3
	The Company has agreements with certain of its derivative counterparties that contain a provision that if the Company defaults on any of its indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then the Company could also be declared in default on its derivative obligations.
	The Company also has agreements with certain of its derivative counterparties that contain a provision that if the Company fails to maintain its status as a well / adequate capitalized institution, then the counterparty could terminate the derivative positions and the Company would be required to settle its obligations under the agreements.
	As of December 31, 2014, 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 $2,084,000. The Company has minimum collateral posting thresholds with certain of its derivative counterparties, and has posted collateral of $1,250,000 against its obligations under these agreements. If the Company had breached any of these provisions at December 31, 2014, it could have been required to settle its obligations under the agreements at the termination value.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation
	The consolidated financial statements include the accounts of Provident Financial Services, Inc. (the “Company”), The Provident Bank (the “Bank”) and their wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation.
Business	Business
	The Company, through the Bank, provides a full range of banking services to individual and business customers through branch offices in New Jersey and eastern Pennsylvania. The Bank is subject to competition from other financial institutions and to the regulations of certain federal and state agencies, and undergoes periodic examinations by those regulatory authorities.
Basis of Financial Statement Presentation	Basis of Financial Statement Presentation
	The consolidated financial statements of the Company have been prepared in conformity with U.S. generally accepted accounting principles (“GAAP”). In preparing the consolidated financial statements, management is required to make estimates and assumptions about future events. These estimates and the underlying assumptions affect the reported amounts of assets and liabilities and disclosures about contingent assets and liabilities as of the dates of the consolidated statements of financial condition, and revenues and expenses for the periods then ended. Such estimates are used in connection with the determination of the allowance for loan losses, evaluation of goodwill for impairment, evaluation of other-than-temporary impairment on securities, evaluation of the need for valuation allowances on deferred tax assets, and determination of liabilities related to retirement and other post-retirement benefits, among others. These estimates and assumptions are based on management’s best estimates and judgment. Management evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors, including the current economic environment, which management believes to be reasonable under the circumstances. Such estimates and assumptions are adjusted when facts and circumstances dictate. Illiquid credit markets, volatile securities markets, and declines in the housing market and the economy generally have combined to increase the uncertainty inherent in such estimates and assumptions. As future events and their effects cannot be determined with precision, actual results could differ significantly from these estimates. Changes in estimates resulting from continuing changes in the economic environment will be reflected in the financial statements in future periods.
Cash and Cash Equivalents	Cash and Cash Equivalents
	For purposes of reporting cash flows, cash and cash equivalents include cash and due from banks, Federal funds sold and commercial paper with maturity dates less than 90 days.
Securities	Securities
	Securities include investment securities held to maturity and securities available for sale. Securities that the Company has the positive intent and ability to hold to maturity are classified as “investment securities held to maturity” and reported at amortized cost. Securities to be held for indefinite periods of time and not intended to be held to maturity are classified as “securities available for sale” and are reported at estimated fair value, with unrealized gains and losses excluded from earnings and reported as a separate component of stockholders’ equity, net of deferred taxes.
	The estimated fair values of the Company’s securities are affected by changes in interest rates, credit spreads, and market illiquidity. The Company conducts a periodic review and evaluation of the securities portfolio to determine if any declines in the fair values of securities are other-than-temporary. In accordance with the Financial Accounting Standards Board (“FASB”) Accounting Standard Codification (“ASC”) Topic 320 “Investments-Debt and Equity Securities” on April 1, 2009, to determine if a decline in value is other-than- temporary, the Company evaluates if it has the intent to sell these securities or if it is more likely than not that the Company would be required to sell the securities before the anticipated recovery. If such a decline were deemed other-than-temporary, the Company would measure the total credit-related component of the unrealized loss, and recognize that portion of the loss as a charge to current period earnings. The remaining portion of the unrealized loss would be recognized as an adjustment to accumulated other comprehensive income. In general, as interest rates rise, the market value of fixed-rate securities decreases and as interest rates fall, the market value of fixed-rate securities increases. The market for non-investment grade, privately issued mortgage-backed securities remains illiquid and prices have not appreciated despite favorable movements in interest rates. To determine if a decline in value is other-than-temporary, the Company evaluates if it has the intent to sell these securities or if it is more likely than not that the Company would be required to sell the securities before the anticipated recovery.
	Premiums and discounts on securities are amortized and accreted to income using a method that approximates the interest method over the remaining period to contractual maturity, adjusted for anticipated prepayments. Dividend and interest income are recognized when earned. Realized gains and losses are recognized when securities are sold or called based on the specific identification method.
Fair Value of Financial Instruments	Fair Value of Financial Instruments
	GAAP establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (level 1 measurements) and the lowest priority to unobservable inputs (level 3 measurements). A financial instrument’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement.
Federal Home Loan Bank of New York Stock	Federal Home Loan Bank of New York Stock
	The Bank, as a member of the Federal Home Loan Bank of New York (“FHLB”), is required to hold shares of capital stock of the FHLB at cost based on a specified formula. The Bank carries this investment at cost, which approximates fair value.
Loans	Loans
	Loans receivable are carried at unpaid principal balances plus unamortized premiums, purchase accounting mark-to-market adjustments, certain deferred direct loan origination costs and deferred loan origination fees and discounts, less the allowance for loan losses.
	The Bank defers loan origination fees and certain direct loan origination costs and accretes such amounts as an adjustment to yield over the expected lives of the related loans using the interest method. Premiums and discounts on loans purchased are amortized or accreted as an adjustment of yield over the contractual lives of the related loans, adjusted for prepayments when applicable, using methodologies which approximate the interest method.
	Loans are generally placed on non-accrual status when they are past due 90 days or more as to contractual obligations or when other circumstances indicate that collection is questionable. When a loan is placed on non-accrual status, any interest accrued but not received is reversed against interest income. Payments received on a non-accrual loan are either applied to the outstanding principal balance or recorded as interest income, depending on an assessment of the ability to collect the loan. A non-accrual loan is restored to accrual status when principal and interest payments become less than 90 days past due and its future collectibility is reasonably assured.
	An impaired loan is defined as a loan for which it is probable, based on current information, that the lender will not collect all amounts due under the contractual terms of the loan agreement. Impaired loans are individually assessed to determine that each loan’s carrying value is not in excess of the fair value of the related collateral or the present value of the expected future cash flows. Residential mortgage and consumer loans are deemed smaller balance homogeneous loans which are evaluated collectively for impairment and are therefore excluded from the population of impaired loans.
	Purchased Credit-Impaired (“PCI”) loans, are loans acquired at a discount primarily due to deteriorated credit quality. PCI loans are recorded at fair value at the date of acquisition, with no allowance for loan losses. The difference between the undiscounted cash flows expected at acquisition and the fair value of the PCI loans at acquisition represents the accretable yield and is recognized as interest income over the life of the loans. Contractually required payments for interest and principal that exceed the undiscounted cash flows expected at acquisition represent the non-accretable discount and are not recognized as a yield adjustment or a valuation allowance. Reclassifications of the non-accretable to accretable yield may occur subsequent to the loan acquisition dates due to an increase in expected cash flows of the loans and results in an increase in interest income on a prospective basis.
Allowance for Loan Losses	Allowance for Loan Losses
	Losses on loans are charged to the allowance for loan losses. Additions to this allowance are made by recoveries of loans previously charged off and by a provision charged to expense. The determination of the balance of the allowance for loan losses is based on an analysis of the loan portfolio, economic conditions, historical loan loss experience and other factors that warrant recognition in providing for an adequate allowance.
	While management uses available information to recognize losses on loans, future additions to the allowance for loan losses may be necessary based on changes in economic conditions in the Bank’s market area. In addition, various regulatory agencies, as an integral part of their examination process, periodically review the Bank’s allowance for loan losses. Such agencies may require the Bank to recognize additions to the allowance or additional write-downs based on their judgments about information available to them at the time of their examination.
Foreclosed Assets	Foreclosed Assets
	Assets acquired through foreclosure or deed in lieu of foreclosure are carried at the lower of the outstanding loan balance at the time of foreclosure or fair value, less estimated costs to sell. Fair value is generally based on recent appraisals. When an asset is acquired, the excess of the loan balance over fair value, less estimated costs to sell, is charged to the allowance for loan losses. A reserve for foreclosed assets may be established to provide for possible write-downs and selling costs that occur subsequent to foreclosure. Foreclosed assets are carried net of the related reserve. Operating results from real estate owned, including rental income, operating expenses, and gains and losses realized from the sales of real estate owned, are recorded as incurred.
Banking Premises and Equipment	Banking Premises and Equipment
	Land is carried at cost. Banking premises, furniture, fixtures and equipment are carried at cost, less accumulated depreciation, computed using the straight-line method based on their estimated useful lives (generally 25 to 40 years for buildings and 3 to 5 years for furniture and equipment). Leasehold improvements, carried at cost, net of accumulated depreciation, are amortized over the terms of the leases or the estimated useful lives of the assets, whichever are shorter, using the straight-line method. Maintenance and repairs are charged to expense as incurred.
Income Taxes	Income Taxes
	The Company uses the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates in effect for the year in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. The determination of whether deferred tax assets will be realizable is predicated on estimates of future taxable income. Such estimates are subject to management’s judgment. A valuation reserve is established when management is unable to conclude that it is more likely than not that it will realize deferred tax assets based on the nature and timing of these items. The Company recognizes, when applicable, interest and penalties related to unrecognized tax benefits in the provision for income taxes.
Trust Assets	Trust Assets
	Trust assets consisting of securities and other property (other than cash on deposit held by the Bank in fiduciary or agency capacities for customers of the Bank’s wholly owned subsidiary, Beacon Trust Company) are not included in the accompanying consolidated statements of financial condition because such properties are not assets of the Bank.
Intangible Assets	Intangible Assets
	Intangible assets of the Bank consist of goodwill, core deposit premiums, customer relationship premium and mortgage servicing rights. Goodwill represents the excess of the purchase price over the estimated fair value of identifiable net assets acquired through purchase acquisitions. In accordance with GAAP, goodwill with an indefinite useful life is not amortized, but is evaluated for impairment on an annual basis, or more frequently if events or changes in circumstances indicate potential impairment between annual measurement dates. Goodwill is analyzed for impairment each year at September 30th. As permitted by GAAP, the Company prepares a qualitative assessment in determining whether goodwill may be impaired. The factors considered in the assessment include macroeconomic conditions, industry and market conditions and overall financial performance of the Company, among others. The Company completed its annual goodwill impairment test as of September 30, 2014. Based upon its qualitative assessment of goodwill, the Company concluded that goodwill was not impaired and no further quantitative analysis was warranted.
	Core deposit premiums represent the intangible value of depositor relationships assumed in purchase acquisitions and are amortized on an accelerated basis over 8.8 years. Customer relationship premiums represent the intangible value of customer relationships assumed in the purchase acquisition of Beacon and are amortized on an accelerated basis over 12.0 years. Mortgage servicing rights are recorded when purchased or when originated mortgage loans are sold, with servicing rights retained. Mortgage servicing rights are amortized on an accelerated method based upon the estimated lives of the related loans, adjusted for prepayments. Mortgage servicing rights are carried at the lower of amortized cost or fair value.
Bank-owned Life Insurance	Bank-owned Life Insurance
	Bank-owned life insurance is accounted for using the cash surrender value method and is recorded at its realizable value.
Employee Benefit Plans	Employee Benefit Plans
	The Bank maintains a pension plan which covers full-time employees hired prior to April 1, 2003, the date on which the pension plan was frozen. The Bank’s policy is to fund at least the minimum contribution required by the Employee Retirement Income Security Act of 1974. GAAP requires an employer to: (a) recognize in its statement of financial position the over-funded or under-funded status of a defined benefit postretirement plan measured as the difference between the fair value of plan assets and the benefit obligation; (b) measure a plan’s assets and its obligations that determine its funded status at the end of the employer’s fiscal year (with limited exceptions); and (c) recognize as a component of other comprehensive income, net of tax, the actuarial gains and losses and the prior service costs and credits that arise during the period.
	The Bank has a 401(k) plan covering substantially all employees of the Bank. The Bank may match a percentage of the first 6% contributed by participants. The Bank’s matching contribution, if any, is determined by the Board of Directors in its sole discretion.
	The Bank has an Employee Stock Ownership Plan (“ESOP”). The funds borrowed by the ESOP from the Company to purchase the Company’s common stock are being repaid from the Bank’s contributions and dividends paid on unallocated ESOP shares over a period of up to 30 years. The Company’s common stock not allocated to participants is recorded as a reduction of stockholders’ equity at cost. Compensation expense for the ESOP is based on the average price of the Company’s stock during each quarter and the amount of shares allocated during the quarter.
	The Bank has an Equity Plan designed to provide competitive compensation for demonstrated performance and to align the interests of participants directly to increases in shareholder value. The Equity Plan provides for performance-vesting grants as well as time-vesting grants. Time-vesting stock awards, stock options and performance vesting stock awards that are based on a performance condition, such as Earnings Per Share are valued on the closing stock price on the date of grant. Performance vesting stock awards and options that are based on a market condition, such as Total Shareholder Return, would be valued using a generally accepted statistical technique to simulate future stock prices for Provident and the components of the Peer Group which Provident would be measured against.
	Expense related to time vesting stock awards and stock options is based on the fair value of the common stock on the date of the grant and on the fair value of the stock options on the date of the grant, respectively, and is recognized ratably over the vesting period of the awards. Performance vesting stock awards and stock options are either dependent upon a market condition or a performance condition. A market condition performance metric is tied to a stock price, either on an absolute basis, or a relative basis against peers, while a performance-condition is based on internal operations, such as earnings per share. The expense related to a market condition performance-vesting stock award or stock option requires an initial Monte Carlo simulation to determine grant date fair value, which will be recognized as a compensation expense regardless of actual payout, assuming that the executive is still employed at the end of the requisite service period. If pre-vesting termination (forfeiture) occurs, then any expense recognized to date can be reversed. The grant date fair value is recognized ratably over the performance period. The expense related to a performance condition stock award or stock option is based on the fair value of the award on the date of grant, adjusted periodically based upon the number of awards or options expected to be earned, recognized over the performance period.
	In connection with the First Sentinel acquisition in July 2004, the Company assumed the First Savings Bank Directors’ Deferred Fee Plan (the “DDFP”). The DDFP was frozen prior to the acquisition. The Company recorded a deferred compensation equity instrument and corresponding contra-equity account for the value of the shares held by the DDFP at the July 14, 2004 acquisition date. These accounts will be liquidated as shares are distributed from the DDFP in accordance with the plan document. At December 31, 2014, there were 406,883 shares held by the DDFP.
	The Bank maintains a non-qualified plan that provides supplemental benefits to certain executives who are prevented from receiving the full benefits contemplated by the 401(k) Plan’s and the ESOP’s benefit formulas under tax law limits for tax-qualified plans.
Postretirement Benefits Other Than Pensions	Postretirement Benefits Other Than Pensions
	The Bank provides postretirement health care and life insurance plans to certain of its employees. The life insurance coverage is noncontributory to the participant. Participants contribute to the cost of medical coverage based on the employee’s length of service with the Bank. The costs of such benefits are accrued based on actuarial assumptions from the date of hire to the date the employee is fully eligible to receive the benefits. On December 31, 2002, the Bank eliminated postretirement healthcare benefits for employees with less than 10 years of service. GAAP requires an employer to: (a) recognize in its statement of financial position the over-funded or under-funded status of a defined benefit postretirement plan measured as the difference between the fair value of plan assets and the benefit obligation; (b) measure a plan’s assets and its obligations that determine its funded status as of the end of the employer’s fiscal year (with limited exceptions); and (c) recognize as a component of other comprehensive income, net of tax, the actuarial gains and losses and the prior service costs and credits that arise during the period.
Derivatives	Derivatives
	The Company records all derivatives on the balance sheet at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether the Company has elected to designate a derivative in a hedging relationship and apply hedge accounting and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. Currently, none of the Company’s derivatives are designated in qualifying hedging relationships. The existing interest rate derivatives result from a service provided to certain qualifying borrowers in a loan related transaction and, therefore, are not used to manage interest rate risk in the Company’s assets or liabilities. As such, all changes in fair value of the Company’s derivatives are recognized directly in earnings. The fair value of the Company's derivatives are determined using discounted cash flow analysis using observable market-based inputs.
Comprehensive Income	Comprehensive Income
	Comprehensive income is divided into net income and other comprehensive income. Other comprehensive income includes items previously recorded directly to equity, such as unrealized gains and losses on securities available for sale and amortization related to post-retirement obligations. Comprehensive income is presented in a separate Consolidated Statement of Comprehensive Income.
Segment Reporting	Segment Reporting
	The Company’s operations are solely in the financial services industry and include providing to its customers traditional banking and other financial services. The Company operates primarily in the geographical regions of northern and central New Jersey and eastern Pennsylvania. Management makes operating decisions and assesses performance based on an ongoing review of the Bank’s consolidated financial results. Therefore, the Company has a single operating segment for financial reporting purposes.
Earnings Per Share	Earnings Per Share
	Basic earnings per share is computed by dividing income available to common stockholders by the weighted average number of shares outstanding for the period. Diluted earnings per share reflects the potential dilution that could occur if securities or other contracts to issue common stock (such as stock options) were exercised or resulted in the issuance of common stock. These potentially dilutive shares would then be included in the weighted average number of shares outstanding for the period using the treasury stock method. Shares issued and shares reacquired during the period are weighted for the portion of the period that they were outstanding.
Impact of Recent Accounting Pronouncements	Impact of Recent Accounting Pronouncements
	In August 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-14, “Receivables - Troubled Debt Restructurings by Creditors: Classification of Certain Government-Guaranteed Mortgage Loans upon Foreclosure.” The amendments in this update affect creditors that hold government guaranteed mortgage loans, including those guaranteed by the Federal Housing Administration and the U.S. Department of Veterans Affairs. The amendments in this update require that a mortgage loan be derecognized and that a separate other receivable be recognized upon foreclosure if the following conditions are met (i) the loan has a government guarantee that is not separable from the loan before foreclosure, (ii) at the time of foreclosure, the creditor has the intent to convey the real estate property to the guarantor and make a claim on the guarantee, and the creditor has the ability to recover under that claim, and (iii) at the time of foreclosure, any amount of the claim that is determined on the basis of the fair value of the real estate is fixed. Upon foreclosure, the separate other receivable should be measured based on the amount of the loan balance (principal and interest) expected to be recovered from the guarantor. The amendments in this update are effective for public business entities for annual periods, and interim periods within those annual periods, beginning after December 15, 2014. The Company does not anticipate a significant impact to the consolidated financial statements related to this guidance. The Company will comply with the provisions of this guidance upon its effective date and, if applicable, record a separate other receivable for foreclosed government guaranteed mortgage loans.
	In June 2014, the FASB issued ASU No. 2014-12, "Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period," which requires that a performance target that affects vesting and that could be achieved after the requisite service period be treated as a performance condition. This update is effective for interim and annual periods beginning after December 15, 2015. The amendments can be applied prospectively to all awards granted or modified after the effective date or retrospectively to all awards with performance targets that are outstanding as of the beginning of the earliest annual period presented and to all new or modified awards thereafter. Early adoption is permitted. The Company does not expect that the adoption of this guidance will have a significant impact on the Company’s consolidated financial statements.
	Also in June 2014, the FASB issued ASU No. 2014-11, "Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures" which aligns the accounting for repurchase to maturity transactions and repurchase agreements executed as a repurchase financing with the accounting for other typical repurchase agreements. Going forward, these transactions would all be accounted for as secured borrowings. This update is effective for the first interim or annual period beginning after December 15, 2014. In addition the disclosure of certain transactions accounted for as a sale is effective for the first interim or annual period beginning on or after December 15, 2014, and the disclosure for transactions accounted for as secured borrowings is required for annual periods beginning after December 15, 2014, and interim periods beginning after March 15, 2015. Early adoption is prohibited. The Company is currently assessing the impact that the adoption of this update will have on its consolidated financial statements and disclosures.
	In May 2014, the FASB issued ASU 2014-09, "Revenue from Contracts with Customers." The objective of this amendment is to clarify the principles for recognizing revenue and to develop a common revenue standard for U.S. GAAP. This update affects any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of non-financial assets unless those contracts are in the scope of other standards. For public entities, the amendments in this update are effective for annual reporting periods beginning after December 15, 2016. The Company does not anticipate a material impact to the consolidated financial statements related to this guidance.
	In January 2014, the FASB issued ASU No. 2014-04, “Receivables-Troubled Debt Restructurings by Creditors (Subtopic 310-40): Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure,” which clarifies that an in-substance repossession or foreclosure occurs, and a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan, upon either the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure, or the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. Additionally, this ASU requires interim and annual disclosure of both the amount of foreclosed residential real estate property held by the creditor and the recorded investment in consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure according to local requirements of the applicable jurisdiction. ASU No. 2014-04 is effective for annual and interim periods beginning after December 15, 2014. The Company’s adoption of ASU No. 2014-04 is not expected to have a significant impact on its consolidated financial statements.

Stockholders_Equity_and_Acquis1

Stockholders' Equity and Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Schedule of Business Acquisitions, by Acquisition [Table Text Block]	The following table summarizes the estimated fair values of the assets acquired and the liabilities assumed at the date of acquisition from Team Capital, net of cash consideration paid (in thousands):
		At May 30, 2014
	Assets acquired:
	Cash and cash equivalents, net	$	68,650
	Securities available for sale	157,635
	Loans	631,209
	Bank-owned life insurance	22,319
	Banking premises and equipment	24,778
	Accrued interest receivable	3,060
	Goodwill	40,354
	Other intangibles assets	9,868
	Foreclosed assets, net	653
	Other assets	5,448
	Total assets acquired	963,974
	Liabilities assumed:
	Deposits	769,936
	Borrowed Funds	112,835
	Other liabilities	(2,314		)
	Total liabilities assumed	880,457
	Net assets acquired	$	83,517

Investment_Securities_Held_to_1

Investment Securities Held to Maturity (Tables)	12 Months Ended
	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Investment Securities Held to Maturity	Investment securities held to maturity at December 31, 2014 and 2013 are summarized as follows (in thousands):
		2014
		Amortized		Gross		Gross		Fair
		cost		unrealized		unrealized		value
				gains		losses
	Agency obligations	$	6,813	17		(20	)	6,810
	Mortgage-backed securities	2,816		123		—		2,939
	State and municipal obligations	449,410		13,814		(986	)	462,238
	Corporate obligations	10,489		29		(32	)	10,486
		$	469,528	13,983		(1,038	)	482,473
		2013
		Amortized		Gross		Gross		Fair
		cost		unrealized		unrealized		value
				gains		losses
	Agency obligations	$	7,523	13		(66	)	7,470
	Mortgage-backed securities	5,273		247		—		5,520
	State and municipal obligations	334,750		5,435		(7,198	)	332,987
	Corporate obligations	9,954		58		(76	)	9,936
		$	357,500	5,753		(7,340	)	355,913
Securities Held to Maturity by Contractual Maturity	The amortized cost and fair value of investment securities held to maturity at December 31, 2014 by contractual maturity are shown below (in thousands). Expected maturities may differ from contractual maturities due to prepayment or early call privileges of the issuer.
		2014
		Amortized		Fair
		cost		value
	Due in one year or less	$	8,939	9,011
	Due after one year through five years	52,090		53,225
	Due after five years through ten years	175,546		181,887
	Due after ten years	230,137		235,411
		$	466,712	479,534
Disclosure Regarding Length of Time on Investment Securities with Temporary Impairment	The following table represents the Company’s disclosure on investment securities held to maturity with temporary impairment (in thousands):
		December 31, 2014 Unrealized Losses
		Less than 12 months				12 months or longer				Total
		Fair value		Gross		Fair value		Gross		Fair value	Gross
				unrealized				unrealized			unrealized
				losses				losses			losses
	Agency obligations	$	3,735	(20	)	—		—		3,735	(20	)
	State and municipal obligations	27,679		(217	)	47,079		(769	)	74,758	(986	)
	Corporate obligations	6,888		(32	)	—		—		6,888	(32	)
		$	38,302	(269	)	47,079		(769	)	85,381	(1,038	)
		December 31, 2013 Unrealized Losses
		Less than 12 months				12 months or longer				Total
		Fair value		Gross		Fair value		Gross		Fair value	Gross
				unrealized				unrealized			unrealized
				losses				losses			losses
	Agency obligations	$	5,766	(66	)	—		—		5,766	(66	)
	State and municipal obligations	123,988		(5,376	)	19,051		(1,822	)	143,039	(7,198	)
	Corporate obligations	5,387		(76	)	—		—		5,387	(76	)
		$	135,141	(5,518	)	19,051		(1,822	)	154,192	(7,340	)

Securities_Available_for_Sale_

Securities Available for Sale (Tables)	12 Months Ended
	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Securities Available for Sale	Securities available for sale at December 31, 2014 and 2013 are summarized as follows (in thousands):
		2014
		Amortized		Gross		Gross		Fair value
		cost		unrealized		unrealized
				gains		losses
	U.S. Treasury obligations	$	8,016	3		(3	)	8,016
	Agency obligations	94,871		268		(63	)	95,076
	Mortgage-backed securities	944,796		15,610		(3,149	)	957,257
	State and municipal obligations	6,855		147		—		7,002
	Corporate obligations	6,526		9		(15	)	6,520
	Equity securities	397		127		—		524
		$	1,061,461	16,164		(3,230	)	1,074,395
		2013
		Amortized		Gross		Gross		Fair value
		cost		unrealized		unrealized
				gains		losses
	Agency obligations	$	93,223	372		(179	)	93,416
	Mortgage-backed securities	1,060,013		14,493		(19,532	)	1,054,974
	State and municipal obligations	8,739		171		(152	)	8,758
	Equity securities	357		89		—		446
		$	1,162,332	15,125		(19,863	)	1,157,594
Securities Available for Sale by Contractual Maturity	The amortized cost and fair value of securities available for sale at December 31, 2014, by contractual maturity, are shown below (in thousands). Expected maturities may differ from contractual maturities due to prepayment or early call privileges of the issuer.
		2014
		Amortized		Fair
		cost		value
	Due in one year or less	$	28,709	28,831
	Due after one year through five years	81,558		81,729
	Due after five years through ten years	3,018		3,015
	Due after ten years	2,983		3,039
		$	116,268	116,614
Roll-Forward of Credit Loss Component of Other-than-Temporary Impairment	Changes in the credit loss component of credit-impaired debt securities were as follows (in thousands):
		December 31,		December 31,
		2014		2013
	Beginning credit loss amount	$	1,674	1,240
	Add: Initial OTTI credit losses	—		—
	Subsequent OTTI credit losses	—		434
	Less: Realized losses for securities sold	1,674		—
	Securities intended or required to be sold	—		—
	Increases in expected cash flows on debt securities	—		—
	Ending credit loss amount	$	—	1,674
Disclosure on Securities Available for Sale with Temporary Impairment	The following table represents the Company’s disclosure on securities available for sale with temporary impairment (in thousands):
		December 31, 2014 Unrealized Losses
		Less than 12 months				12 months or longer				Total
		Fair value		Gross		Fair value		Gross		Fair value	Gross
				unrealized				unrealized			unrealized
				losses				losses			losses
	U.S. Treasury obligations	$	5,937	(3	)	—		—		5,937	(3	)
	Agency obligations	24,404		(40	)	5,010		(23	)	29,414	(63	)
	Mortgage-backed securities	55,488		(221	)	206,669		(2,928	)	262,157	(3,149	)
	State and municipal obligations	—		—		—		—		—	—
	Corporate obligations	3,466		(15	)	—		—		3,466	(15	)
		$	89,295	(279	)	211,679		(2,951	)	300,974	(3,230	)
		December 31, 2013 Unrealized Losses
		Less than 12 months				12 months or longer				Total
		Fair value		Gross		Fair value		Gross		Fair value	Gross
				unrealized				unrealized			unrealized
				losses				losses			losses
	Agency obligations	$	34,355	(179	)	—		—		34,355	(179	)
	Mortgage-backed securities	604,778		(18,850	)	13,521		(682	)	618,299	(19,532	)
	State and municipal obligations	2,867		(152	)	—		—		2,867	(152	)
		$	642,000	(19,181	)	13,521		(682	)	655,521	(19,863	)

Loans_Receivable_and_Allowance1

Loans Receivable and Allowance for Loan Losses (Tables)	12 Months Ended
	Dec. 31, 2014
Receivables [Abstract]
Schedule of Summarized Loans Receivable	Loans receivable at December 31, 2014 and 2013 are summarized as follows (in thousands):
		2014				2013
	Mortgage loans:
	Residential	$	1,251,445			1,174,043
	Commercial	1,694,359				1,400,624
	Multi-family	1,041,582				928,906
	Construction	221,102				183,289
	Total mortgage loans	4,208,488				3,686,862
	Commercial loans	1,262,422				932,199
	Consumer loans	611,467				577,602
	Total gross loans	6,082,377				5,196,663
	Purchased credit-impaired ("PCI") loans	4,510				—
	Premiums on purchased loans	5,307				4,202
	Unearned discounts	(53		)		(62	)
	Net deferred fees	(6,636		)		(5,990	)
		$	6,085,505			5,194,813
Summary of Aging Loans Receivable by Portfolio Segment and Class	The following table summarizes the aging of loans receivable by portfolio segment and class of loans , excluding PCI loans (in thousands):
		At December 31, 2014
		30-59 Days				60-89 Days		Non-accrual		Total Past Due			Current		Total Loans		Recorded
															Receivable		Investment >
																	90 days
																	accruing
	Mortgage loans:														.
	Residential	$	10,121			4,331		17,222		31,674			1,219,771		1,251,445		—
	Commercial	146				30		20,026		20,202			1,674,157		1,694,359		—
	Multi-family	—				—		321		321			1,041,261		1,041,582		—
	Construction	—				—		—		—			221,102		221,102		—
	Total mortgage loans	10,267				4,361		37,569		52,197			4,156,291		4,208,488		—
	Commercial loans	1,000				371		12,342		13,713			1,248,709		1,262,422		—
	Consumer loans	2,398				2,509		3,944		8,851			602,616		611,467		—
	Total gross loans	$	13,665			7,241		53,855		74,761			6,007,616		6,082,377		—
		At December 31, 2013
		30-59 Days				60-89 Days		Non-accrual		Total Past Due			Current		Total Loans		Recorded
															Receivable		Investment >
																	90 days
																	accruing
	Mortgage loans:
	Residential	$	10,639			5,062		23,011		38,712			1,135,331		1,174,043		—
	Commercial	687				318		18,662		19,667			1,380,957		1,400,624		—
	Multi-family	—				—		403		403			928,503		928,906		—
	Construction	—				—		8,448		8,448			174,841		183,289		—
	Total mortgage loans	11,326				5,380		50,524		67,230			3,619,632		3,686,862		—
	Commercial loans	305				77		22,228		22,610			909,589		932,199		—
	Consumer loans	2,474				2,194		3,928		8,596			569,006		577,602		—
	Total gross loans	$	14,105			7,651		76,680		98,436			5,098,227		5,196,663		—
Summary of Loans Receivable by Portfolio Segment and Impairment Method	Loans receivable summarized by portfolio segment and impairment method, excluding PCI loans are as follows (in thousands):
		At December 31, 2014
		Mortgage				Commercial		Consumer		Total
		loans				loans		loans		Portfolio
										Segments
	Individually evaluated for impairment	$	66,548			16,463		2,384		85,395
	Collectively evaluated for impairment	4,141,940				1,245,959		609,083		5,996,982
	Total gross loans	$	4,208,488			1,262,422		611,467		6,082,377
		At December 31, 2013
		Mortgage				Commercial		Consumer		Total
		loans				loans		loans		Portfolio
										Segments
	Individually evaluated for impairment	$	75,839			28,210		2,321		106,370
	Collectively evaluated for impairment	3,611,023				903,989		575,281		5,090,293
	Total gross loans	$	3,686,862			932,199		577,602		5,196,663
Summary of Allowance for Loan Losses by Portfolio Segment and Impairment Classification	The allowance for loan losses is summarized by portfolio segment and impairment classification, excluding PCI loans as follows (in thousands):
		At December 31, 2014
		Mortgage				Commercial		Consumer		Total			Unallocated		Total
		loans				loans		loans		Portfolio
										Segments
	Individually evaluated for impairment	$	4,696			2,318		113		7,127			—		7,127
	Collectively evaluated for impairment	27,281				22,063		4,768		54,112			495		54,607
	Total	$	31,977			24,381		4,881		61,239			495		61,734
		At December 31, 2013
		Mortgage				Commercial		Consumer		Total			Unallocated		Total
		loans				loans		loans		Portfolio
										Segments
	Individually evaluated for impairment	$	7,829			2,221		167		10,217			—		10,217
	Collectively evaluated for impairment	26,315				21,886		4,762		52,963			1,484		54,447
	Total	$	34,144			24,107		4,929		63,180			1,484		64,664
Schedule of Troubled Debt Restructuring	The following tables present the number of loans modified as TDRs during the years ended December 31, 2014 and 2013 and their balances immediately prior to the modification date and post-modification as of December 31, 2014 and 2013.
			Year Ended December 31, 2014
	Troubled Debt Restructurings		Number of			Pre-Modification			Post-Modification
			Loans			Outstanding			Outstanding
						Recorded			Recorded
						Investment			Investment
			($ in thousands)
	Mortgage loans:
	Residential		14			$	3,034		2,725
	Commercial		1			865			861
	Total mortgage loans		15			3,899			3,586
	Commercial loans		—			—			—
	Consumer loans		2			394			156
	Total restructured loans		17			$	4,293		3,742
			Year Ended December 31, 2013
	Troubled Debt Restructurings		Number of			Pre-Modification			Post-Modification
			Loans			Outstanding			Outstanding
						Recorded			Recorded
						Investment			Investment
						($ in thousands)
	Mortgage loans:
	Residential		42			$	9,097		9,149
	Commercial		1			330			304
	Total mortgage loans		43			9,427			9,453
	Commercial loans		3			1,846			1,816
	Consumer loans		8			1,119			1,095
	Total restructured loans		54			$	12,392		12,364
Schedule of Troubled Debt Restructurings Subsequently Defaulted	The following table presents loans modified as TDRs within the previous 12 months from December 31, 2014 and 2013, and for which there was a payment default (90 days or more past due) during the years ended December 31, 2014 and 2013:
			Year Ended						Year Ended
			December 31, 2014						December 31, 2013
	Troubled Debt Restructurings Subsequently Defaulted		Number of			Outstanding			Number of		Outstanding
			Loans			Recorded			Loans		Recorded
						Investment					Investment
						($ in thousands)					($ in thousands)
	Commercial loans		—			—			3		1,815
	Consumer loans		—			—			1		130
	Total restructured loans		—			$	—		4		$	1,945
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Table Text Block]	The following table presents information regarding the estimates of the contractually required payments, the cash flows expected to be collected and the estimated fair value of the PCI loans acquired from Team Capital at May 30, 2014 (in thousands):
			30-May-14
	Contractually required principal and interest		$	12,505
	Contractual cash flows not expected to be collected (non-accretable discount)		(6,475		)
	Expected cash flows to be collected at acquisition		6,030
	Interest component of expected cash flows (accretable yield)		(810		)
	Fair value of acquired loans		$	5,220
	The following table summarizes the changes in the accretable yield for PCI loans for the ended December 31, 2014 (in thousands):
			Year ended December 31, 2014
	Beginning balance		$	—
	Acquisition		810
	Accretion		(592		)
	Reclassification from non-accretable difference		477
	Ending balance		$	695
Allowance for Loan Losses	The activity in the allowance for loan losses for the years ended December 31, 2014, 2013 and 2012 is as follows (in thousands):
		Years Ended December 31,
		2014				2013		2012
	Balance at beginning of period	$	64,664			70,348		74,351
	Provision charged to operations	4,650				5,500		16,000
	Recoveries of loans previously charged off	3,292				3,222		3,904
	Loans charged off	(10,872		)		(14,406	)	(23,907	)
	Balance at end of period	$	61,734			64,664		70,348
Schedule of Allowance for Loan Losses by Portfolio Segment	The activity in the allowance for loan losses by portfolio segment for the years ended December 31, 2014 and 2013 are as follows (in thousands):
		For the Year Ended December 31, 2014
		Mortgage				Commercial		Consumer		Total			Unallocated		Total
		loans				loans		loans		Portfolio
										Segments
	Balance at beginning of period	$	34,144			24,107		4,929		63,180			1,484		64,664
	Provision charged to operations	1,455				2,947		1,237		5,639			(989	)	4,650
	Recoveries of loans previously charged off	286				1,776		1,230		3,292			—		3,292
	Loans charged off	(3,908		)		(4,449	)	(2,515	)	(10,872	)		—		(10,872	)
	Balance at end of period	$	31,977			24,381		4,881		61,239			495		61,734
		Year ended December 31, 2013
		Mortgage				Commercial		Consumer		Total			Unallocated		Total
		loans				loans		loans		Portfolio
										Segments
	Balance at beginning of period	$	37,962			20,315		5,224		63,501			6,847		70,348
	Provision charged to operations	2,065				6,403		2,395		10,863			(5,363	)	5,500
	Recoveries of loans previously charged off	1,133				1,075		1,014		3,222			—		3,222
	Loans charged off	(7,016		)		(3,686	)	(3,704	)	(14,406	)		—		(14,406	)
	Balance at end of period	$	34,144			24,107		4,929		63,180			1,484		64,664
Summary of Impaired Loans Receivable by Class	Impaired loans receivable by class, excluding PCI loans are summarized as follows (in thousands):
		At December 31, 2014													At December 31, 2013
		Unpaid				Recorded		Related		Average			Interest		Unpaid			Recorded		Related	Average	Interest
		Principal				Investment		Allowance		Recorded			Income		Principal			Investment		Allowance	Recorded	Income
		Balance								Investment			Recognized		Balance						Investment	Recognized
	Loans with no related allowance
	Mortgage loans:
	Residential	$	14,942			10,629		—		11,138			357		13,459			9,999		—	10,322	299
	Commercial	4,971				4,708		—		4,713			—		4,917			4,667		—	4,834	3
	Multi-family	—				—		—		—			—		—			—		—	—	—
	Construction	—				—		—		—			—		—			—		—	—	—
	Total	19,913				15,337		—		15,851			357		18,376			14,666		—	15,156	302
	Commercial loans	2,718				2,179		—		1,823			4		8,163			6,674		—	8,252	24
	Consumer loans	1,250				830		—		870			28		754			618		—	674	26
	Total loans	$	23,881			18,346		—		18,544			389		27,293			21,958		—	24,082	352
	Loans with an allow-ance recorded
	Mortgage loans:
	Residential	$	15,523			14,906		2,367		15,106			555		$	17,122		16,473		2,571	16,610	557
	Commercial	37,555				36,306		2,329		36,674			914		37,320			36,251		2,309	36,727	976
	Multi-family	—				—		—		—			—		—			—		—	—	—
	Construction	—				—		—		—			—		9,810			8,449		2,949	8,659	—
	Total	53,078				51,212		4,696		51,780			1,469		64,252			61,173		7,829	61,996	1,533
	Commercial loans	15,990				14,283		2,318		15,967			390		22,779			21,536		2,221	23,204	650
	Consumer loans	1,565				1,554		113		1,578			80		1,732			1,703		167	1,726	63
	Total loans	$	70,633			67,049		7,127		69,325			1,939		$	88,763		84,412		10,217	86,926	2,246
	Total
	Mortgage loans:
	Residential	$	30,465			25,535		2,367		26,244			912		$	30,581		26,472		2,571	26,932	856
	Commercial	42,526				41,014		2,329		41,387			914		42,237			40,918		2,309	41,561	979
	Multi-family	—				—		—		—			—		—			—		—	—	—
	Construction	—				—		—		—			—		9,810			8,449		2,949	8,659	—
	Total	72,991				66,549		4,696		67,631			1,826		82,628			75,839		7,829	77,152	1,835
	Commercial loans	18,708				16,462		2,318		17,790			394		30,942			28,210		2,221	31,456	674
	Consumer loans	2,815				2,384		113		2,448			108		2,486			2,321		167	2,400	89
	Total loans	$	94,514			85,395		7,127		87,869			2,328		$	116,056		106,370		10,217	111,008	2,598
Summary of Loans Receivable by Credit Quality Risk Rating Indicator	Loans receivable by credit quality risk rating indicator, excluding PCI loans are as follows (in thousands):
		At December 31, 2014
		Residential				Commercial		Multi-		Construction			Total		Commercial		Consumer		Total loans
						mortgages		family					mortgages		loans		loans
	Special mention	$	4,331			18,414		851		—			23,596		45,599		2,509		71,704
	Substandard	17,222				53,454		322		2,600			73,598		32,828		3,938		110,364
	Doubtful	—				1,063		—		—			1,063		29		—		1,092
	Loss	—				—		—		—			—		—		—		—
	Total classified and criticized	21,553				72,931		1,173		2,600			98,257		78,456		6,447		183,160
	Acceptable/watch	1,229,892				1,621,428		1,040,409		218,502			4,110,231		1,183,966		605,020		5,899,217
	Total outstanding loans	$	1,251,445			1,694,359		1,041,582		221,102			4,208,488		1,262,422		611,467		6,082,377
		At December 31, 2013
		Residential				Commercial		Multi-		Construction			Total		Commercial		Consumer		Total loans
						mortgages		family					mortgages		loans		loans
	Special mention	$	5,062			15,301		—		—			20,363		28,551		2,037		50,951
	Substandard	23,011				54,592		403		8,449			86,455		46,687		4,220		137,362
	Doubtful	—				—		—		—			—		649		—		649
	Loss	—				—		—		—			—		—		—		—
	Total classified and criticized	28,073				69,893		403		8,449			106,818		75,887		6,257		188,962
	Acceptable/watch	1,145,970				1,330,731		928,503		174,840			3,580,044		856,312		571,345		5,007,701
	Total outstanding loans	$	1,174,043			1,400,624		928,906		183,289			3,686,862		932,199		577,602		5,196,663

Banking_Premises_and_Equipment1

Banking Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Banking Premises and Equipment	A summary of banking premises and equipment at December 31, 2014 and 2013 is as follows (in thousands):
		2014		2013
	Land	$	15,767	13,955
	Banking premises	80,526		64,129
	Furniture, fixtures and equipment	42,836		31,565
	Leasehold improvements	33,819		27,503
	Construction in progress	4,053		3,687
		177,001		140,839
	Less accumulated depreciation and amortization	84,011		74,391
		$	92,990	66,448

Intangible_Assets_Tables

Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	Intangible assets at December 31, 2014 and 2013 are summarized as follows (in thousands):
		2014			2013
	Goodwill	$	392,757		352,609
	Core deposit premiums	7,603			1,096
	Customer relationship and other intangibles	2,987			1,563
	Mortgage servicing rights	1,075			1,164
		$	404,422		356,432
Amortization Expense of Intangible Assets	Amortization expense of intangible assets for the years ended December 31, 2014, 2013 and 2012 is as follows (in thousands):
		2014			2013	2012
	Core deposit premiums	$	1,472		965	1,698
	Customer relationship and other intangibles	1,106			335	367
	Mortgage servicing rights	179			324	401
		$	2,757		1,624	2,466
Scheduled Amortization of Core Deposit Intangibles	Scheduled amortization of core deposit and customer relationship intangibles for each of the next five years is as follows (in thousands):
	Year ended December 31,		Scheduled Amortization
	2015		$	2,973
	2016		2,071
	2017		1,530
	2018		1,102
	2019		925

Deposits_Tables

Deposits (Tables)	12 Months Ended
	Dec. 31, 2014
Banking and Thrift [Abstract]
Schedule of Deposits	Deposits at December 31, 2014 and 2013 are summarized as follows (in thousands):
		2014		Weighted		2013		Weighted
				average				average
				interest rate				interest rate
	Savings deposits	$	995,347	0.1	%	$	921,993	0.09	%
	Money market accounts	1,496,466		0.27		1,281,596		0.25
	NOW accounts	1,425,424		0.27		1,326,941		0.29
	Non-interest bearing deposits	1,049,597		—		865,187		—
	Certificates of deposit	825,689		0.89		806,754		0.97
		$	5,792,523			$	5,202,471
Scheduled Maturities of Certificates of Deposit	Scheduled maturities of certificates of deposit accounts at December 31, 2014 and 2013 are as follows (in thousands):
		2014		2013
	Within one year	$	568,462	529,896
	One to three years	152,317		193,457
	Three to five years	100,080		82,344
	Five years and thereafter	4,830		1,057
		$	825,689	806,754
Interest Expense on Deposits	Interest expense on deposits for the years ended December 31, 2014, 2013 and 2012 is summarized as follows (in thousands):
		Years ended December 31,
		2014		2013		2012
	Savings deposits	$	938	960		1,449
	NOW and money market accounts	7,733		7,456		10,292
	Certificates of deposits	6,661		9,615		13,607
		$	15,332	18,031		25,348

Borrowed_Funds_Tables

Borrowed Funds (Tables)	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Schedule of Borrowed Funds	Borrowed funds at December 31, 2014 and 2013 are summarized as follows (in thousands):
		2014		2013
	Securities sold under repurchase agreements	$	246,571	246,322
	FHLB line of credit	73,000		183,000
	FHLB advances	1,190,280		774,557
		$	1,509,851	1,203,879
Scheduled Maturities of FHLB Advances	Scheduled maturities of FHLB advances at December 31, 2014 are as follows (in thousands):
		2014
	Due in one year or less	$	269,668
	Due after one year through two years	150,398
	Due after two years through three years	262,534
	Due after three years through four years	211,220
	Due after four years through five years	203,991
	Thereafter	92,469
		$	1,190,280
Scheduled Maturities of Securities Sold Under Repurchase Agreements	Scheduled maturities of securities sold under repurchase agreements at December 31, 2014 are as follows (in thousands):
		2014
	Due in one year or less	$	91,571
	Due after one year through two years	75,000
	Due after two years through three years	25,000
	Due after three years through four years	20,000
	Due after four years through five years	35,000
	Thereafter	—
		$	246,571
Debt Disclosure by Year	The following tables set forth certain information as to Borrowed Funds for the years ended December 31, 2014 and 2013 (in thousands):
		Maximum		Average	Weighted
		balance		balance	average
					interest
					rate
	2014:00:00
	Securities sold under repurchase agreements	$	255,633	245,260	1.72	%
	FHLB line of credit	180,000		104,121	0.37
	FHLB advances	1,190,280		989,245	2.08
	Federal funds purchased	—		—	—
	2013:00:00
	Securities sold under repurchase agreements	$	294,034	260,004	1.74	%
	FHLB line of credit	183,000		48,784	0.38
	FHLB advances	774,557		599,991	2.34
	Federal funds purchased	—		253	1

Benefit_Plans_Tables

Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Pension Plan and Post-Retirement Healthcare and Life Insurance Plans	The following table sets forth information regarding the pension plan and post-retirement healthcare and life insurance plans (in thousands):
		Pension										Post-retirement
		2014				2013			2012			2014			2013			2012
	Change in benefit obligation:
	Benefit obligation at beginning of year	$	28,605			32,189			28,277			22,086			25,116			23,327
	Service cost	—				—			—			169			240			252
	Interest cost	1,271				1,273			1,287			1,087			981			1,043
	Actuarial loss (gain)	51				114			779			51			(210	)		231
	Benefits paid	(5,326		)		(969	)		(891	)		(670	)		(624	)		(634	)
	Change in actuarial assumptions	4,320				(4,002	)		2,737			5,610			(3,417	)		897
	Benefit obligation at end of year	$	28,921			28,605			32,189			28,333			22,086			25,116
	Change in plan assets:
	Fair value of plan assets at beginning of year	$	45,202			40,072			32,666			—			—			—
	Actual return on plan assets	2,868				6,099			4,184			—			—			—
	Employer contributions	—				—			4,113			670			624			634
	Benefits paid	(5,326		)		(969	)		(891	)		(670	)		(624	)		(634	)
	Fair value of plan assets at end of year	$	42,744			45,202			40,072			—			—			—
	Funded status at end of year	$	13,823			16,597			7,883			(28,333	)		(22,086	)		(25,116	)
Components of Accumulated Other Comprehensive Loss (Gain)	The components of accumulated other comprehensive loss (gain) related to the pension plan and other post-retirement benefits, on a pre-tax basis, at December 31, 2014 and 2013 are summarized in the following table (in thousands):
		Pension							Post-retirement
		2014				2013			2014			2013
	Unrecognized prior service cost	$	—			—			(1	)		(5	)
	Unrecognized net actuarial loss (gain)	10,887				7,699			1,788			(4,076	)
	Total accumulated other comprehensive loss (gain)	$	10,887			7,699			1,787			(4,081	)
	The following table presents the changes in the components of accumulated other comprehensive income, net of tax, for the years ended December 31, 2014 and 2013 (in thousands):
			Changes in Accumulated Other Comprehensive Income by Component, net of tax
			For the Years Ended December 31,
			2014										2013
			Unrealized				Post  Retirement			Accumulated			Unrealized			Post  Retirement			Accumulated
			Gains on Securities				Obligations			Other			Gains on Securities			Obligations			Other
			Available for							Comprehensive			Available for						Comprehensive
			Sale							Income			Sale						Income
	Balance at the beginning of the period,		$	(2,799	)		(2,052	)		(4,851	)		16,961			(9,245	)		7,716
	Current period change in other comprehensive income (loss)		10,542				(5,662	)		4,880			(19,760	)		7,193			(12,567	)
	Balance at the end of the period		$	7,743			(7,714	)		29			(2,799	)		(2,052	)		(4,851	)
Net Periodic Benefit Cost (Increase)	Net periodic benefit cost (increase) for the years ending December 31, 2014, 2013 and 2012, included the following components (in thousands):
		Pension										Post-retirement
		2014				2013			2012			2014			2013			2012
	Service cost	$	—			—			—			169			240			252
	Interest cost	1,271				1,273			1,287			1,087			981			1,043
	Return on plan assets	(3,463		)		(3,167	)		(2,578	)		—			—			—
	Amortization of:
	Net gain (loss)	441				1,352			1,428			(204	)		15			12
	Lump sum pension distribution	1,336				—			—			—			—			—
	Unrecognized prior service cost	—				—			—			(4	)		(4	)		(4	)
	Net periodic benefit (increase) cost	$	(415	)		(542	)		137			1,048			1,232			1,303
Weighted Average Actuarial Assumptions Used	The weighted average actuarial assumptions used in the plan determinations at December 31, 2014, 2013 and 2012 were as follows:
		Pension									Post-retirement
		2014			2013			2012			2014			2013			2012
	Discount rate	4	%		5	%		4	%		4	%		5	%		4	%
	Rate of compensation increase	—			—			—			—			—			—
	Expected return on plan assets	8			8			8			—			—			—
	Medical and life insurance benefits cost rate of increase	—			—			—			6			6			6.5
Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rate	A 1% change in the assumed health care cost trend rate would have had the following effects on post-retirement benefits at December 31, 2014 (in thousands):
		1% increase				1% decrease
	Effect on total service cost and interest cost	$	220			(180	)
	Effect on post-retirement benefits obligation	$	5,260			(4,160	)
Estimated Future Benefit Payments	Estimated future benefit payments, which reflect expected future service, as appropriate for the next five years, are as follows (in thousands):
		Pension				Post-retirement
	2015	$	1,080,000			$	816,000
	2016	1,141,000				849,000
	2017	1,188,000				882,000
	2018	1,225,000				920,000
	2019	1,269,000				967,000
Weighted-Average Asset Allocation of Pension Plan Assets	The weighted-average asset allocation of pension plan assets at December 31, 2014 and 2013 were as follows:
	Asset Category		2014			2013
	Domestic equities		41	%		44	%
	Foreign equities		12	%		14	%
	Fixed income		45	%		40	%
	Real estate		2	%		2	%
	Cash		0	%		0	%
	Total		100	%		100	%
Target Allocation of Assets and Acceptable Ranges	The target allocation of assets and acceptable ranges around the targets are as follows:
	Asset Category		Target			Allowable Range
	Domestic equities		44	%		35-55%
	Foreign equities		14	%		5-25%
	Fixed income		40	%		30-50%
	Real estate		2	%		0-10%
	Cash		0	%		0-35%
	Total		100	%
Assets Measured at Fair Value on Recurring Basis	The following tables present the assets that are measured at fair value on a recurring basis by level within the U.S. GAAP fair value hierarchy as reported on the statements of net assets available for Plan benefits at December 31, 2014 and 2013, respectively. Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement.
		Fair value measurements at December 31, 2014
	(in thousands)	Total				(Level 1)			(Level 2)			(Level 3)
	Group annuity contracts	$	152			—			152			—
	Mutual funds:
	International equity	5,370				5,370			—			—
	Large U.S. equity	1,689				1,689			—			—
	Small/Mid U.S. equity	1,309				1,309			—			—
	Total mutual funds	8,368				8,368			—			—
	Pooled separate accounts:
	Fixed income	19,789				—			19,789			—
	Large U.S. equity	11,857				—			11,857			—
	Small/Mid U.S. equity	2,578				—			2,578			—
	Total pooled separate accounts	34,224				—			34,224			—
	Total investments	$	42,744			8,368			34,376			—
		Fair value measurements at December 31, 2013
	(in thousands)	Total				(Level 1)			(Level 2)			(Level 3)
	Group annuity contracts	$	180			—			180			—
	Mutual funds:
	Fixed income	9,210				9,210			—			—
	International equity	6,316				6,316			—			—
	Large U.S. equity	1,809				1,809			—			—
	Small/Mid U.S. equity	1,844				1,844			—			—
	Total mutual funds	19,179				19,179			—			—
	Pooled separate accounts:
	Fixed income	8,624				—			8,624			—
	Large U.S. equity	14,509				—			14,509			—
	Small/Mid U.S. equity	2,710				—			2,710			—
	Total pooled separate accounts	25,843				—			25,843			—
	Total investments	$	45,202			19,179			26,023			—
Status of Unvested Stock Awards	A summary status of the granted but unvested stock awards as of December 31, and changes during the year, is presented below:
		Restricted Stock Awards
		2014			2013			2012
	Outstanding at beginning of year	782,213			846,883			904,411
	Granted	426,726			386,669			373,510
	Forfeited	(126,743	)		(68,954	)		(220,590	)
	Vested	(235,734	)		(382,385	)		(210,448	)
	Outstanding at the end of year	846,462			782,213			846,883
Status of Unexercised Stock Options	A summary of the status of the granted but unexercised stock options as of December 31, and changes during the year is presented below:
		2014							2013							2012
		Number			Weighted				Number			Weighted				Number			Weighted
		of			average				of			average				of			average
		stock			exercise				stock			exercise				stock			exercise
		options			price				options			price				options			price
	Outstanding at beginning of year	1,233,742			$	15.24			4,152,016			$	17.5			4,248,898			$	17.37
	Granted	171,935			16.44				85,250			15.23				80,081			14.86
	Exercised	(9,678	)		12.11				(28,464	)		12.41				(2,000	)		12.54
	Forfeited	(4,178	)		14.5				(53,444	)		10.34				(109,655	)		10.41
	Expired	(107,500	)		16.54				(2,921,616	)		18.57				(65,308	)		18.32
	Outstanding at the end of year	1,284,321			$	15.32			1,233,742			$	15.24			4,152,016			$	17.5
Stock Options Outstanding	The following table summarizes information about stock options outstanding at December 31, 2014:
		Options Outstanding									Options Exercisable
	Range of exercise prices	Number			Average		Weighted				Number			Weighted
		of			remaining		average				of			average
		options			contractual		exercise				options			exercise
		outstanding			life		price				exercisable			price
	$10.27-15.23	638,382			5.3 years		$	12.57			476,716			$	11.75
	$16.38-18.87	645,939			3.6 years		$	17.67			478,504			$	18.12
Weighted Average Assumptions of Fair Value Option Grants	The fair value of the option grants was estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted average assumptions:
		For the year ended December 31,
		2014			2013			2012
	Expected dividend yield	3.66	%		3.41	%		3.26	%
	Expected volatility	20.04	%		33.38	%		32.51	%
	Risk-free interest rate	0.96	%		0.88	%		0.86	%
	Expected option life	6.5 years			8 years			8 years

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Current and Deferred Amounts of Income Tax Expense (Benefit)	The current and deferred amounts of income tax expense (benefit) for the years ended December 31, 2014, 2013 and 2012 are as follows (in thousands):
		Years ended December 31,
		2014			2013		2012
	Current:
	Federal	$	27,577		27,667		29,813
	State	542			2,168		176
	Total current	28,119			29,835		29,989
	Deferred:
	Federal	1,678			4,210		(3,208	)
	State	1,988			1,321		2,074
	Total deferred	3,666			5,531		(1,134	)
		$	31,785		35,366		28,855
Reconciliation between Amount Reported and Amount Computed for Income Tax Expense and Income Tax Rate	A reconciliation between the amount of reported total income tax expense and the amount computed by multiplying the applicable statutory income tax rate is as follows (in thousands):
		Years ended December 31,
		2014			2013		2012
	Tax expense at statutory rate of 35%	$	36,896		37,065		33,643
	Increase (decrease) in taxes resulting from:
	State tax, net of federal income tax benefit	1,621			2,268		1,462
	Tax-exempt interest income	(4,916		)	(4,084	)	(3,937	)
	Bank-owned life insurance	(1,972		)	(2,309	)	(1,847	)
	Non-qualified stock option expiration	—			2,746		—
	Other, net	156			(320	)	(466	)
		$	31,785		35,366		28,855
Deferred Tax Assets and Liabilities	The net deferred tax asset is included in other assets in the consolidated statements of financial condition. The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities at December 31, 2014 and 2013 are as follows (in thousands):
		2014			2013
	Deferred tax assets:
	Allowance for loan losses	$	24,160		25,848
	Post-retirement benefit	10,658			10,690
	Deferred compensation	3,009			3,037
	Intangibles	499			511
	Purchase accounting adjustments	387			426
	Depreciation	3,963			3,396
	SERP	949			958
	ESOP	3,264			3,253
	Stock-based compensation	5,734			5,558
	Non-accrual interest	5,202			6,756
	Unrealized loss on securities	—			1,939
	State NOL	430			237
	Federal NOL	1,376			1,692
	Pension liability adjustments	5,178			1,438
	Other	1,073			1,345
	Total gross deferred tax assets	65,882			67,084
	Valuation Reserve	(242		)	(242	)
	Deferred tax liabilities:
	Pension expense	9,925			9,925
	Deferred loan costs	4,089			3,936
	Investment securities, principally due to accretion of discounts	311			235
	Originated mortgage servicing rights	395			447
	Unrealized gain on securities	5,191			—
	Total gross deferred tax liabilities	19,911			14,543
	Net deferred tax asset	$	45,729		52,299

Lease_Commitments_Tables

Lease Commitments (Tables)	12 Months Ended
	Dec. 31, 2014
Leases [Abstract]
Future Minimum Rental Commitments	The approximate future minimum rental commitments, exclusive of taxes and other related charges, for all significant non-cancellable operating leases at December 31, 2014, are summarized as follows (in thousands):
	Year ending December 31,
	2015	$	6,521
	2016	6,455
	2017	5,960
	2018	5,351
	2019	5,093
	Thereafter	12,887
		$	42,267

Regulatory_Capital_Requirement1

Regulatory Capital Requirements (Tables)	12 Months Ended
	Dec. 31, 2014
Banking and Thrift [Abstract]
Actual Capital Amounts and Ratios	The following is a summary of the Company’s actual capital amounts and ratios as of December 31, 2014 and 2013, compared to the FRB minimum capital adequacy requirements and the FRB requirements for classification as a well-capitalized institution (dollars in thousands).
		Actual				FRB minimum capital				To be well-capitalized
						adequacy requirements				under prompt corrective
										action provisions
		Amount		Ratio		Amount		Ratio		Amount		Ratio
	As of December 31, 2014:
	Leverage (Tier 1)	$	740,958	9.21	%	$	321,809	4	%	$	402,262	5	%
	Risk-based capital:
	Tier 1	740,958		12.06		245,859		4		368,788		6
	Total	802,692		13.06		491,717		8		614,646		10
		Actual				FRB minimum capital				To be well-capitalized
						adequacy requirements				under prompt corrective
										action provisions
		Amount		Ratio		Amount		Ratio		Amount		Ratio
	As of December 31, 2013:
	Leverage (Tier 1)	$	660,549	9.42	%	$	280,572	4	%	$	350,715	5	%
	Risk-based capital:
	Tier 1	660,549		12.89		204,967		4		307,451		6
	Total	724,609		14.14		409,934		8		512,418		10
FDIC Minimum Capital Adequacy Requirements	The following is a summary of the Bank’s actual capital amounts and ratios as of December 31, 2014 and 2013, compared to the FDIC minimum capital adequacy requirements and the FDIC requirements for classification as a well-capitalized institution (dollars in thousands).
		Actual				FDIC minimum capital				To be well-capitalized
						adequacy requirements				under prompt corrective
										action provisions
		Amount		Ratio		Amount		Ratio		Amount		Ratio
	As of December 31, 2014:
	Leverage (Tier 1)	$	674,483	8.38	%	$	321,805	4	%	$	402,257	5	%
	Risk-based capital:
	Tier 1	674,483		10.97		245,853		4		368,779		6
	Total	736,217		11.98		491,705		8		614,631		10
		Actual				FDIC minimum capital				To be well-capitalized
						adequacy requirements				under prompt corrective
										action provisions
		Amount		Ratio		Amount		Ratio		Amount		Ratio
	As of December 31, 2013:
	Leverage (Tier 1)	$	585,313	8.34	%	$	280,578	4	%	$	350,723	5	%
	Risk-based capital:
	Tier 1	585,313		11.42		204,967		4		307,450		6
	Total	649,373		12.67		409,933		8		512,417		10

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Assets and Liabilities Reported on Consolidated Statements of Financial Condition at Fair Values	The following tables present the assets and liabilities reported on the consolidated statements of financial condition at their fair value as of December 31, 2014 and 2013, by level within the fair value hierarchy (in thousands).
				Fair Value Measurements at Reporting Date Using:
		December 31,		Quoted Prices in	Significant Other	Significant
		2014		Active Markets for	Observable	Unobservable
				Identical Assets	Inputs (Level 2)	Inputs
				(Level 1)		(Level 3)
	Measured on a recurring basis:
	U.S. Treasury obligations	$	8,016	8,016	—	—
	Agency obligations	95,076		95,076	—	—
	Mortgage-backed securities	957,257		—	957,257	—
	State and municipal obligations	7,002		—	7,002	—
	Corporate obligations	6,520			6,520
	Equities	524		524	—	—
		$	1,074,395	103,616	970,779	—
	Asset derivatives	$	2,046	—	2,046
		$	1,076,441	103,616	972,825	—
	Liability derivatives	$	2,052		2,052
	Measured on a non-recurring basis:
	Loans measured for impairment based on the fair value of the underlying collateral	$	23,086	—	—	23,086
	Foreclosed assets	5,098		—	—	5,098
		$	28,184	—	—	28,184
				Fair Value Measurements at Reporting Date Using:
		December 31,		Quoted Prices in	Significant Other	Significant
		2013		Active Markets for	Observable	Unobservable
				Identical Assets	Inputs (Level 2)	Inputs
				(Level 1)		(Level 3)
	Measured on a recurring basis:
	Agency obligations	$	93,416	93,416	—	—
	Mortgage-backed securities	1,054,974		—	1,054,974	—
	State and municipal obligations	8,758		—	8,758	—
	Equities	446		446	—	—
		$	1,157,594	93,862	1,063,732	—
	Measured on a non-recurring basis:
	Loans measured for impairment based on the fair value of the underlying collateral	$	29,782	—	—	29,782
	Foreclosed assets	5,486		—	—	5,486
		$	35,268	—	—	35,268
Schedule of Financial Instruments at Carrying and Fair Values	The following tables present the Company’s financial instruments at their carrying and fair values as of December 31, 2014 and December 31, 2013. Fair values are presented by level within the fair value hierarchy.
				Fair Value Measurements at December 31, 2014 Using:
	(Dollars in thousands)	Carrying		Fair	Quoted Prices in	Significant Other	Significant
		value		value	Active Markets for	Observable Inputs	Unobservable
					Identical Assets	(Level 2)	Inputs
					(Level 1)		(Level 3)
	Financial assets:
	Cash and cash equivalents	$	103,762	103,762	103,762	—	—
	Securities available for sale:
	U.S. Treasury obligations	8,016		8,016	8,016	—	—
	Agency obligations	95,076		95,076	95,076	—	—
	Mortgage-backed securities	957,257		957,257	—	957,257	—
	State and municipal obligations	7,002		7,002	—	7,002	—
	Corporate obligations	6,520		6,520	—	6,520	—
	Equity securities	524		524	524	—	—
	Total securities available for sale	$	1,074,395	1,074,395	103,616	970,779	—
	Investment securities held to maturity:
	Agency obligations	$	6,813	6,810	6,810	—	—
	Mortgage-backed securities	2,816		2,939	—	2,939	—
	State and municipal obligations	449,410		462,238	—	462,238	—
	Corporate obligations	10,489		10,486	—	10,486	—
	Total securities held to maturity	$	469,528	482,473	6,810	475,663	—
	FHLBNY stock	69,789		69,789	69,789	—	—
	Loans, net of allowance for loan losses	6,023,771		6,104,558	—	—	6,104,558
	Asset derivative	2,046		2,046		2,046
	Financial liabilities:
	Deposits other than certificates of deposits	$	4,966,834	4,966,834	4,966,834	—	—
	Certificates of deposit	825,689		830,233	—	830,233	—
		5,792,523		5,797,067	4,966,834	830,233	—
	Borrowings	$	1,509,851	1,516,966	—	1,516,966	—
	Liability derivative	2,052		2,052		2,052
				Fair Value Measurements at December 31, 2013 Using:
	(Dollars in thousands)	Carrying		Fair	Quoted Prices in	Significant Other	Significant
		value		value	Active Markets for	Observable Inputs	Unobservable
					Identical Assets	(Level 2)	Inputs
					(Level 1)		(Level 3)
	Financial assets:
	Cash and cash equivalents	$	101,224	101,224	101,224	—	—
	Securities available for sale:
	Agency obligations	93,416		93,416	93,416	—	—
	Mortgage-backed securities	1,054,974		1,054,974	—	1,054,974	—
	State and municipal obligations	8,758		8,758	—	8,758	—
	Equity securities	446		446	446	—	—
	Total securities available for sale	$	1,157,594	1,157,594	93,862	1,063,732	—
	Investment securities held to maturity:
	Agency obligations	$	7,523	7,470	7,470	—	—
	Mortgage-backed securities	5,273		5,520	—	5,520	—
	State and municipal obligations	334,750		332,987	—	332,987	—
	Corporate obligations	9,954		9,936	—	9,936	—
	Total securities held to maturity	$	357,500	355,913	7,470	348,443	—
	FHLBNY stock	58,070		58,070	58,070	—	—
	Loans, net of allowance for loan losses	5,130,149		5,221,228	—	—	5,221,228
	Financial liabilities:
	Deposits other than certificates of deposits	$	4,395,717	4,395,717	4,395,717	—	—
	Certificates of deposit	806,754		813,337	—	813,337	—
	Total deposits	$	5,202,471	5,209,054	4,395,717	813,337	—
	Borrowings	$	1,203,879	1,218,136	—	1,218,136	—

Selected_Quarterly_Financial_D1

Selected Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Selected Quarterly Financial Data (Unaudited)	The following tables are a summary of certain quarterly financial data for the years ended December 31, 2014 and 2013.
		2014 Quarters Ended
		March 31		June 30			September 30			December 31
		(In thousands, except per share data)
	Interest income	$	64,523	$	67,386		$	73,652		$	73,800
	Interest expense	9,322		9,985			10,683			10,482
	Net interest income	55,201		57,401			62,969			63,318
	Provision for loan losses	400		1,500			1,500			1,250
	Net interest income after provision for loan losses	54,801		55,901			61,469			62,068
	Non-interest income	8,116		10,327			11,309			11,416
	Non-interest expense	38,190		43,671			45,833			42,297
	Income before income tax expense	24,727		22,557			26,945			31,187
	Income tax expense	7,698		6,206			7,913			9,968
	Net income	$	17,029	$	16,351		$	19,032		$	21,219
	Basic earnings per share	$	0.3	$	0.28		$	0.3		$	0.34
	Diluted earnings per share	$	0.3	$	0.28		$	0.3		$	0.34
		2013 Quarter Ended
		March 31		June 30		September 30			December 31
		(In thousands, except per share data)
	Interest income	$	63,304	62,413		62,984			64,076
	Interest expense	9,409		9,002		8,987			9,369
	Net interest income	53,895		53,411		53,997			54,707
	Provision for loan losses	1,500		1,000		1,200			1,800
	Net interest income after provision for loan losses	52,395		52,411		52,797			52,907
	Non-interest income	9,945		12,637		11,730			9,841
	Non-interest expense	36,946		37,813		36,464			37,540
	Income before income tax expense	25,394		27,235		28,063			25,208
	Income tax expense	7,566		8,007		11,987			7,806
	Net income	$	17,828	19,228		16,076			17,402
	Basic earnings per share	$	0.31	0.34		0.28			0.3
	Diluted earnings per share	$	0.31	0.34		0.28			0.3

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Basic and Diluted Earnings (Loss) Per Share	The following is a reconciliation of the outstanding shares used in the basic and diluted earnings per share calculations.
	(Dollars in thousands, except per share data)	For the Year Ended December 31,
		2014		2013	2012
	Net income	$	73,631	70,534	67,267
	Basic weighted average common shares outstanding	60,388,398		57,236,909	57,145,868
	Plus:
	Dilutive shares	173,672		124,534	53,936
	Diluted weighted average common shares outstanding	60,562,070		57,361,443	57,199,804
	Earnings per share:
	Basic	$	1.22	1.23	1.18
	Diluted	$	1.22	1.23	1.18

Parentonly_Financial_Informati1

Parent-only Financial Information (Tables)	12 Months Ended
	Dec. 31, 2014
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Statements of Financial Condition	The condensed financial statements of Provident Financial Services, Inc. (parent company only) are presented below:
	PROVIDENT FINANCIAL SERVICES, INC.
	Condensed Statements of Financial Condition
	(Dollars in Thousands)
		December 31,			December 31,
		2014			2013
	Assets
	Cash and due from banks	$	10,475		$	12,796
	Securities available for sale, at fair value	524			446
	Investment in subsidiary	1,077,624			935,517
	Due from subsidiary—SAP	2,794			6,269
	ESOP loan	53,438			56,716
	Other assets	34			59
	Total assets	$	1,144,889		$	1,011,803
	Liabilities and Stockholders’ Equity
	Other liabilities	790			1,050
	Total stockholders’ equity	1,144,099			1,010,753
	Total liabilities and stockholders’ equity	$	1,144,889		$	1,011,803
Condensed Statements of Operations	PROVIDENT FINANCIAL SERVICES, INC.
	Condensed Statements of Operations
	(Dollars in Thousands)
		For the Years Ended December 31,
		2014			2013		2012
	Dividends from subsidiary	$	36,118		32,320		40,729
	Interest income	2,276			2,390		2,696
	Investment gain	11			9		9
	Total income	38,405			34,719		43,434
	Non-interest expense	814			891		882
	Total expense	814			891		882
	Income before income tax expense	37,591			33,828		42,552
	Income tax expense	551			563		688
	Income before undistributed net income of subsidiary	37,040			33,265		41,864
	Equity in undistributed net income of subsidiary	36,591			37,269		25,403
	(dividends in excess of earnings)
	Net income	$	73,631		70,534		67,267
Condensed Statements of Cash Flows	PROVIDENT FINANCIAL SERVICES, INC.
	Condensed Statements of Cash Flows
	(Dollars in Thousands)
		For the Years Ended December 31,
		2014			2013		2012
	Cash flows from operating activities:
	Net income	$	73,631		70,534		67,267
	Adjustments to reconcile net income to net cash provided by operating activities
	Dividends in excess of earnings (equity in undistributed net income) of subsidiary	(36,591		)	(37,269	)	(25,403	)
	ESOP allocation	2,654			2,559		2,030
	SAP allocation	6,359			4,869		3,658
	Stock option allocation	298			297		452
	Decrease in due from subsidiary—SAP	3,475			5,814		4,177
	Increase (decrease) in other assets	15,454			(6,912	)	(13,960	)
	(Decrease) increase in other liabilities	(259		)	(172	)	68
	Net cash provided by operating activities	65,021			39,720		38,289
	Cash flows from investing activities:
	Cash consideration paid for business acquisition	(31,562		)	—		—
	Net decrease in ESOP loan	3,278			3,034		3,035
	Net cash (used in) provided by investing activities	(28,284		)	3,034		3,035
	Cash flows from financing activities:
	Purchases of treasury stock	(4,420		)	(5,899	)	(9,424	)
	Cash dividends paid	(36,118		)	(32,320	)	(40,729	)
	Shares issued dividend reinvestment plan	1,336			1,186		6,090
	Stock options exercised	144			412		28
	Net cash used in financing activities	(39,058		)	(36,621	)	(44,035	)
	Net (decrease) increase in cash and cash equivalents	(2,321		)	6,133		(2,711	)
	Cash and cash equivalents at beginning of period	12,796			6,663		9,374
	Cash and cash equivalents at end of period	$	10,475		12,796		6,663

Other_Comprehensive_Income_Los1

Other Comprehensive Income (Loss) (Tables)	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Components of Other Comprehensive (Loss) Income	The following table presents the components of other comprehensive income (loss) both gross and net of tax, for the years ended December 31, 2014, 2013 and 2012 (in thousands):
		For the Years Ended December 31,
		2014										2013									2012
		Before				Tax			After			Before			Tax			After			Before		Tax		After
		Tax				Effect			Tax			Tax			Effect			Tax			Tax		Effect		Tax
	Components of Other Comprehensive Income(Loss):
	Unrealized gains and losses on securities available for sale:
	Net gains (losses) arising during the period	$	17,868			(7,176	)		10,692			(32,845	)		13,417			(19,428	)		3,060		(1,250	)	1,810
	Reclassification adjustment for gains included in net income	(251		)		101			(150	)		(996	)		407			(589	)		(4,497	)	1,837		(2,660	)
	Total	17,617				(7,075	)		10,542			(33,841	)		13,824			(20,017	)		(1,437	)	587		(850	)
	Other-than-temporary impairment on debt securities available for sale:
	Other-than-temporary impairment losses on securities	—				—			—			—			—			—			—		—		—
	Reclassification adjustment for impairment losses included in net income	—				—			—			434			(177	)		257			—		—		—
	Total	—				—			—			434			(177	)		257			—		—		—
	Amortization related to post retirement obligations	(9,462		)		3,800			(5,662	)		12,161			(4,968	)		7,193			(1,699	)	694		(1,005	)
	Total other comprehensive income (loss)	$	8,155			(3,275	)		4,880			(21,246	)		8,679			(12,567	)		(3,136	)	1,281		(1,855	)
Changes in Accumulated Other Comprehensive Income by Component, net of tax	The components of accumulated other comprehensive loss (gain) related to the pension plan and other post-retirement benefits, on a pre-tax basis, at December 31, 2014 and 2013 are summarized in the following table (in thousands):
		Pension							Post-retirement
		2014				2013			2014			2013
	Unrecognized prior service cost	$	—			—			(1	)		(5	)
	Unrecognized net actuarial loss (gain)	10,887				7,699			1,788			(4,076	)
	Total accumulated other comprehensive loss (gain)	$	10,887			7,699			1,787			(4,081	)
	The following table presents the changes in the components of accumulated other comprehensive income, net of tax, for the years ended December 31, 2014 and 2013 (in thousands):
			Changes in Accumulated Other Comprehensive Income by Component, net of tax
			For the Years Ended December 31,
			2014										2013
			Unrealized				Post  Retirement			Accumulated			Unrealized			Post  Retirement			Accumulated
			Gains on Securities				Obligations			Other			Gains on Securities			Obligations			Other
			Available for							Comprehensive			Available for						Comprehensive
			Sale							Income			Sale						Income
	Balance at the beginning of the period,		$	(2,799	)		(2,052	)		(4,851	)		16,961			(9,245	)		7,716
	Current period change in other comprehensive income (loss)		10,542				(5,662	)		4,880			(19,760	)		7,193			(12,567	)
	Balance at the end of the period		$	7,743			(7,714	)		29			(2,799	)		(2,052	)		(4,851	)
Reclassification Out of Accumulated Other Comprehensive Income	The following table summarizes the reclassifications out of accumulated other comprehensive income for the years ended December 31, 2014 and 2013(in thousands):
			Reclassifications Out of Accumulated Other Comprehensive
			Income
			Amount reclassified from AOCI for the years ended December 31,							Affected line item in the Consolidated
			2014				2013			Statement of Income
	Details of AOCI:
	Securities available for sale:
	Realized net gains on the sale of securities available for sale		$	251			996			Net gain on securities transactions
			(101		)		(407	)		Income tax expense
			150				589			Net of tax
	Realized other-than-temporary impairment losses securities available for sale		—				(434	)		Net impairment losses on securities recognized in earnings
			—				177			Income tax expense
			—				(257	)		Net of tax
	Post retirement obligations:
	Amortization of actuarial losses		237				1,367			Compensation and employee benefits (1)
			(95		)		(558	)		Income tax expense
			142				809			Net of tax
	Realized loss related to lump sum pension settlement		(1,336		)		—			Compensation and employee benefits (1)
			546				—			Income tax expense
			(790		)		—			Net of tax
	Total reclassifications		$	(498	)		1,141			Net of tax
	(1) This item is included in the computation of net periodic benefit cost. See Note 11. Benefit Plans

Derivative_and_Hedging_Activit1

Derivative and Hedging Activities (Tables)	12 Months Ended
	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	The table below presents the fair value of the Company’s derivative financial instruments as well as their classification on the Consolidated Statements of Financial Condition as of December 31, 2014 (in thousands):
		As of December 31, 2014
		Asset Derivatives				Liability Derivatives
		Consolidated Statements of Financial Condition	Fair			Consolidated Statements of Financial Condition	Fair
			Value				Value
	Derivatives not designated as a hedging instruments:
	Interest rate products	Other assets	$	2,040		Other liabilities	$	2,052
	Credit contracts	Other assets	6				—
	Total derivatives not designated as hedging instruments		$	2,046			$	2,052
Derivative Instruments, Gain (Loss)	The tables below present the effect of the Company’s derivative financial instruments on the Consolidated Statements of Income for the year ended December 31, 2014 (in thousands).
			Gain (loss) recognized in Income on derivatives
		Consolidated Statements of Income	Year ended
			31-Dec-14
	Derivatives not designated as a hedging instruments:
	Interest rate products	Other income	$	(3	)
	Credit contracts	Other income	6
	Total		$	3

Summary_of_Significant_Account2

Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2002
Property, Plant and Equipment [Line Items]
Cash and cash equivalents maturity period, days	90 days
Percentage of participants matched contribution	6.00%
Dividends paid on unallocated ESOP shares over period (in years)	30 years
Date of acquisition	14-Jul-04
Shares held by the DDFP	406,883
Service period of employee subjected to elimination of postretirement healthcare benefits (in years)		10 years
Depositor Relationships [Member]
Property, Plant and Equipment [Line Items]
Amortized accelerated basis period (in years)	8 years 9 months 18 days
Customer Relationships [Member]
Property, Plant and Equipment [Line Items]
Amortized accelerated basis period (in years)	12 years
Building [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life, (in years)	25 years
Building [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life, (in years)	40 years
Furniture And Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life, (in years)	3 years
Furniture And Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life, (in years)	5 years

Stockholders_Equity_and_Acquis2

Stockholders' Equity and Acquisitions - Stockholders’ Equity (Detail) (USD $)	1 Months Ended	12 Months Ended
In Millions, except Share data, unless otherwise specified	Jan. 15, 2003	Dec. 31, 2013	Dec. 31, 2003	Dec. 31, 2014
Equity [Abstract]
Common stock, shares issued	59,600,000	83,209,285		83,209,285
Common stock, par value	$0.01	$0.01		$0.01
Common stock, per share	$10
Proceeds from issuance of common stock	$567.20
Cash donated			4.8
Number of shares donated			1,920,000
Value of shares donated			24
Liquidation date		31-Dec-14
Liquidation account balance				$15.70

Stockholders_Equity_and_Acquis3

Stockholders' Equity and Acquisitions - Acquisitions (Details) (USD $)	12 Months Ended			0 Months Ended
Share data in Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	30-May-14
Business Acquisition [Line Items]
Common stock issued for acquisitions	$83,517,000	$0	$0
Assets acquired:
Goodwill	392,757,000	352,609,000
Team Capital [Member]
Business Acquisition [Line Items]
Consideration transferred				115,100,000
Acquisition purchase price				31,600,000
Common stock issued for acquisitions				83,500,000
Assets acquired:
Cash and cash equivalents, net				68,650,000
Securities available for sale				157,635,000
Loans				631,209,000
Bank-owned life insurance				22,319,000
Banking premises and equipment				24,778,000
Accrued interest receivable				3,060,000
Goodwill				40,354,000
Other intangibles assets				9,868,000
Foreclosed assets, net				653,000
Other assets				5,448,000
Total assets acquired				963,974,000
Liabilities assumed:
Deposits				769,936,000
Borrowed Funds				112,835,000
Other liabilities				-2,314,000
Total liabilities assumed				880,457,000
Net assets acquired				$83,517,000
Common Stock [Member] | Team Capital [Member]
Business Acquisition [Line Items]
Number of shares				4.9

Restrictions_on_Cash_and_Due_f1

Restrictions on Cash and Due from Banks (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Cash and due from banks	$102,484	$100,053
Cash Reserves Required by Banking Regulations [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Cash and due from banks	$20,502	$21,052

Investment_Securities_Held_to_2

Investment Securities Held to Maturity - Investment Securities Held to Maturity (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost	$469,528	$357,500
Gross unrealized gains	13,983	5,753
Gross unrealized losses	-1,038	-7,340
Fair value	482,473	355,913
Agency Obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost	6,813	7,523
Gross unrealized gains	17	13
Gross unrealized losses	-20	-66
Fair value	6,810	7,470
Mortgage-Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost	2,816	5,273
Gross unrealized gains	123	247
Gross unrealized losses	0	0
Fair value	2,939	5,520
State and Municipal Obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost	449,410	334,750
Gross unrealized gains	13,814	5,435
Gross unrealized losses	-986	-7,198
Fair value	462,238	332,987
Corporate Obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost	10,489	9,954
Gross unrealized gains	29	58
Gross unrealized losses	-32	-76
Fair value	$10,486	$9,936

Investment_Securities_Held_to_3

Investment Securities Held to Maturity - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
	security	security
Schedule of Held-to-maturity Securities [Line Items]
Held to maturity securities at carrying value	$343,127,000	$186,251,000
Investment securities held to maturity	469,528,000	357,500,000
Fair value	482,473,000	355,913,000
Proceeds from the calls	41,057,000	97,974,000	77,207,000
Number of securities in an unrealized loss position	163	270
Held to Maturity Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Recognized gain on calls of securities held to maturity portfolio	23,000	90,000
Recognized loss on calls of securities held to maturity portfolio	0	0
Proceeds from the calls	15,156,000	49,631,000
Held to Maturity Securities [Member] | Nonperforming Financing Receivable [Member]
Schedule of Held-to-maturity Securities [Line Items]
Proceeds from the calls	524,000
Gross realized gains (losses) on securities sold	-3,000	18,000
Gross recognized gain (loss) on calls of securities	0	0
Mortgage-Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Investment securities held to maturity	2,816,000	5,273,000
Fair value	$2,939,000	$5,520,000

Investment_Securities_Held_to_4

Investment Securities Held to Maturity - Securities Held to Maturity by Contractual Maturity (Detail) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Schedule of Held-to-maturity Securities [Line Items]
Due in one year or less, amortized cost	$8,939
Due after one year through five years, amortized cost	52,090
Due after five years through ten years, amortized cost	175,546
Due after ten years, amortized cost	230,137
Amortized cost	466,712
Due in one year or less, fair value	9,011
Due after one year through five years, fair value	53,225
Due after five years through ten years, fair value	181,887
Due after ten years, fair value	235,411
Fair value	$479,534

Investment_Securities_Held_to_5

Investment Securities Held to Maturity - Disclosure Regarding Length of Time on Investment Securities with Temporary Impairment (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value	$38,302	$135,141
12 months or longer, Fair value	47,079	19,051
Total, fair value	85,381	154,192
Less than 12 months, gross unrealized losses	-269	-5,518
12 months or longer, gross unrealized losses	-769	-1,822
Total, gross unrealized losses	-1,038	-7,340
Agency Obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value	3,735	5,766
12 months or longer, Fair value	0	0
Total, fair value	3,735	5,766
Less than 12 months, gross unrealized losses	-20	-66
12 months or longer, gross unrealized losses	0	0
Total, gross unrealized losses	-20	-66
State and Municipal Obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value	27,679	123,988
12 months or longer, Fair value	47,079	19,051
Total, fair value	74,758	143,039
Less than 12 months, gross unrealized losses	-217	-5,376
12 months or longer, gross unrealized losses	-769	-1,822
Total, gross unrealized losses	-986	-7,198
Corporate Obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value	6,888	5,387
12 months or longer, Fair value	0	0
Total, fair value	6,888	5,387
Less than 12 months, gross unrealized losses	-32	-76
12 months or longer, gross unrealized losses	0	0
Total, gross unrealized losses	($32)	($76)

Securities_Available_for_Sale_1

Securities Available for Sale - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
	security	security
Schedule of Available-for-sale Securities [Line Items]
Securities available for sale at carrying value	$585,928,000	$627,053,000
Amortized cost	1,061,461,000	1,162,332,000
Securities available for sale, at fair value	1,074,395,000	1,157,594,000
Proceeds from the sale of securities available for sale	25,033,000	14,834,000	106,768,000
Gross gains	632,000	888,000
Recognized gains on calls on securities in available for sale portfolio	2,000
Losses related to calls	404,000	0
Proceeds from the calls	207,531,000	351,472,000	488,590,000
Other than temporary impairment losses		434,000
Number of securities in an unrealized loss position	43	76
Gain on previously impaired securities	59,000
Loss on previously impaired securities	365,000
Cumulative Credit Losses	1,700,000
Available-for-sale Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	116,268,000
Securities available for sale, at fair value	116,614,000
Proceeds from the sale of securities available for sale	24,509,000	14,310,000
Proceeds from the calls	740,000	896,000
Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	944,796,000	1,060,013,000
Securities available for sale, at fair value	957,257,000	1,054,974,000
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	397,000	357,000
Securities available for sale, at fair value	524,000	446,000
Private Label Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	1,800,000
Number of securities in an unrealized loss position	2
Unrealized losses	$16,200

Securities_Available_for_Sale_2

Securities Available for Sale - Securities Available for Sale (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	$1,061,461	$1,162,332
Gross unrealized gains	16,164	15,125
Gross unrealized losses	-3,230	-19,863
Securities available for sale, at fair value	1,074,395	1,157,594
US Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	8,016
Gross unrealized gains	3
Gross unrealized losses	-3
Securities available for sale, at fair value	8,016
Agency Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	94,871	93,223
Gross unrealized gains	268	372
Gross unrealized losses	-63	-179
Securities available for sale, at fair value	95,076	93,416
Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	944,796	1,060,013
Gross unrealized gains	15,610	14,493
Gross unrealized losses	-3,149	-19,532
Securities available for sale, at fair value	957,257	1,054,974
State and Municipal Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	6,855	8,739
Gross unrealized gains	147	171
Gross unrealized losses	0	-152
Securities available for sale, at fair value	7,002	8,758
Corporate Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	6,526
Gross unrealized gains	9
Gross unrealized losses	-15
Securities available for sale, at fair value	6,520
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	397	357
Gross unrealized gains	127	89
Gross unrealized losses	0	0
Securities available for sale, at fair value	$524	$446

Securities_Available_for_Sale_3

Securities Available for Sale - Securities Available for Sale by Contractual Maturity (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	$1,061,461	$1,162,332
Securities available for sale, at fair value	1,074,395	1,157,594
Available-for-sale Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Due in one year or less, amortized cost	28,709
Due after one year through five years, amortized cost	81,558
Due after five years through ten years, amortized cost	3,018
Due after ten years, amortized cost	2,983
Amortized cost	116,268
Due in one year or less, fair value	28,831
Due after one year through five years, fair value	81,729
Due after five years through ten years, fair value	3,015
Due after ten years, fair value	3,039
Securities available for sale, at fair value	$116,614

Securities_Available_for_Sale_4

Securities Available for Sale - Roll-Forward of Credit Loss Component of Other-than-Temporary Impairment (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Beginning credit loss amount	$1,674	$1,240
Add: Initial OTTI credit losses	0	0
Subsequent OTTI credit losses	0	434
Less: Realized losses for securities sold	1,674	0
Securities intended or required to be sold	0	0
Increases in expected cash flows on debt securities	0	0
Ending credit loss amount	$0	$1,674

Securities_Available_for_Sale_5

Securities Available for Sale - Disclosure on Securities Available for Sale with Temporary Impairment (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, fair value	$89,295	$642,000
12 months or longer, fair value	211,679	13,521
Total, fair value	300,974	655,521
Less than 12 months, gross unrealized losses	-279	-19,181
12 months or longer, gross unrealized losses	-2,951	-682
Total, gross unrealized losses	-3,230	-19,863
US Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, fair value	5,937
12 months or longer, fair value	0
Total, fair value	5,937
Less than 12 months, gross unrealized losses	-3
12 months or longer, gross unrealized losses	0
Total, gross unrealized losses	-3
Agency Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, fair value	24,404	34,355
12 months or longer, fair value	5,010	0
Total, fair value	29,414	34,355
Less than 12 months, gross unrealized losses	-40	-179
12 months or longer, gross unrealized losses	-23	0
Total, gross unrealized losses	-63	-179
Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, fair value	55,488	604,778
12 months or longer, fair value	206,669	13,521
Total, fair value	262,157	618,299
Less than 12 months, gross unrealized losses	-221	-18,850
12 months or longer, gross unrealized losses	-2,928	-682
Total, gross unrealized losses	-3,149	-19,532
State and Municipal Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, fair value	0	2,867
12 months or longer, fair value	0	0
Total, fair value	0	2,867
Less than 12 months, gross unrealized losses	0	-152
12 months or longer, gross unrealized losses	0	0
Total, gross unrealized losses	0	-152
Corporate Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, fair value	3,466
12 months or longer, fair value	0
Total, fair value	3,466
Less than 12 months, gross unrealized losses	-15
12 months or longer, gross unrealized losses	0
Total, gross unrealized losses	($15)

Loans_Receivable_and_Allowance2

Loans Receivable and Allowance for Loan Losses - Additional Information (Detail) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	30-May-14
									Borrowers	Borrowers
									SecurityLoan	SecurityLoan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortization of interest income									$694,000	$1,286,000	$1,694,000
Principal amount of nonaccrual loans	53,900,000				76,700,000				53,900,000	76,700,000
Increase in interest income									1,877,000	1,913,000	3,022,000
Impaired loan defined floor limit	1,000,000								1,000,000
Impaired loans number									147	152
Number of troubled debt restructurings										142
Impaired loans	85,395,000				106,370,000				85,395,000	106,370,000
Number of borrowers									120	110
Loans and leases receivable, impaired, nonperforming, accrual of interest					89,400,000					89,400,000
Loans charged off									10,872,000	14,406,000	23,907,000
Allowances for loan losses	7,127,000				10,217,000				7,127,000	10,217,000
Weighted average modified interest rate									4.58%	4.08%
Yield percentage rate									5.69%	5.75%
Average balances of impaired loans									87,869,000	111,008,000	115,611,000
Loan commitments	908,581,000				657,563,000				908,581,000	657,563,000
Undisbursed home equity and personal credit lines	300,029,000				252,522,000				300,029,000	252,522,000
Interest income	73,800,000	73,652,000	67,386,000	64,523,000	64,076,000	62,984,000	62,413,000	63,304,000	279,361,000	252,777,000	262,259,000
No Allowance For Loan Losses Required [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired financing receivable with no related allowance	18,346,000				21,958,000				18,346,000	21,958,000
With Related Allowance For Loan Losses [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Allowances for loan losses	7,127,000				10,217,000				7,127,000	10,217,000
Impaired Loans Troubled Debt Restructurings [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans number									143
Number of troubled debt restructurings									123	115
Impaired loans	81,700,000								81,700,000
Loans and leases receivable, impaired, nonperforming, accrual of interest	54,800,000				58,200,000				54,800,000	58,200,000
Allowances for loan losses	419,000				1,000,000				419,000	1,000,000
Residential Commercial And Commercial Mortgage Loan [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans number									147	152
Impaired loans	85,400,000				106,400,000				85,400,000	106,400,000
Residential Commercial And Commercial Mortgage Loan [Member] | Non Accrual [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans number									24	37
Impaired loans	30,619,000				48,204,000				30,619,000	48,204,000
Team Capital [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest component of expected cash flows (accretable yield)												5,220,000
Loans declined	710,000
Certain loans acquired in transfer not accounted for as debt securities	4,500,000								4,500,000			5,200,000
Interest income									$348,000

Loans_Receivable_and_Allowance3

Loans Receivable and Allowance for Loan Losses - Schedule of Summarized Loans Receivable (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	$6,082,377	$5,196,663
Purchased Credit-Impaired Loans	4,510	0
Premiums on purchased loans	5,307	4,202
Unearned discounts	-53	-62
Net deferred fees	-6,636	-5,990
Loans receivable	6,085,505	5,194,813
Mortgage Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total mortgage loans	4,208,488	3,686,862
Residential [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total mortgage loans	1,251,445	1,174,043
Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total mortgage loans	1,694,359	1,400,624
Multi-Family [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total mortgage loans	1,041,582	928,906
Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total mortgage loans	221,102	183,289
Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	1,262,422	932,199
Consumer Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	$611,467	$577,602

Loans_Receivable_and_Allowance4

Loans Receivable and Allowance for Loan Losses - Summary of Aging Loans Receivable by Portfolio Segment and Class (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days	$13,665	$14,105
60-89 Days	7,241	7,651
Non-accrual	53,855	76,680
Total Past Due	74,761	98,436
Current	6,007,616	5,098,227
Total Loans Receivable	6,082,377	5,196,663
Recorded Investment 90 days accruing	0	0
Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days	1,000	305
60-89 Days	371	77
Non-accrual	12,342	22,228
Total Past Due	13,713	22,610
Current	1,248,709	909,589
Total Loans Receivable	1,262,422	932,199
Recorded Investment 90 days accruing	0	0
Consumer Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days	2,398	2,474
60-89 Days	2,509	2,194
Non-accrual	3,944	3,928
Total Past Due	8,851	8,596
Current	602,616	569,006
Total Loans Receivable	611,467	577,602
Recorded Investment 90 days accruing	0	0
Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days	10,267	11,326
60-89 Days	4,361	5,380
Non-accrual	37,569	50,524
Total Past Due	52,197	67,230
Current	4,156,291	3,619,632
Total Loans Receivable	4,208,488	3,686,862
Recorded Investment 90 days accruing	0	0
Mortgage Loans [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days	10,121	10,639
60-89 Days	4,331	5,062
Non-accrual	17,222	23,011
Total Past Due	31,674	38,712
Current	1,219,771	1,135,331
Total Loans Receivable	1,251,445	1,174,043
Recorded Investment 90 days accruing	0	0
Mortgage Loans [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days	146	687
60-89 Days	30	318
Non-accrual	20,026	18,662
Total Past Due	20,202	19,667
Current	1,674,157	1,380,957
Total Loans Receivable	1,694,359	1,400,624
Recorded Investment 90 days accruing	0	0
Mortgage Loans [Member] | Multi-Family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days	0	0
60-89 Days	0	0
Non-accrual	321	403
Total Past Due	321	403
Current	1,041,261	928,503
Total Loans Receivable	1,041,582	928,906
Recorded Investment 90 days accruing	0	0
Mortgage Loans [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days	0	0
60-89 Days	0	0
Non-accrual	0	8,448
Total Past Due	0	8,448
Current	221,102	174,841
Total Loans Receivable	221,102	183,289
Recorded Investment 90 days accruing	$0	$0

Loans_Receivable_and_Allowance5

Loans Receivable and Allowance for Loan Losses - Summary of Loans Receivable by Portfolio Segment and Impairment Method (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	$85,395	$106,370
Collectively evaluated for impairment	5,996,982	5,090,293
Total Loans Receivable	6,082,377	5,196,663
Mortgage Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	66,548	75,839
Collectively evaluated for impairment	4,141,940	3,611,023
Total Loans Receivable	4,208,488	3,686,862
Commercial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	16,463	28,210
Collectively evaluated for impairment	1,245,959	903,989
Total Loans Receivable	1,262,422	932,199
Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	2,384	2,321
Collectively evaluated for impairment	609,083	575,281
Total Loans Receivable	$611,467	$577,602

Loans_Receivable_and_Allowance6

Loans Receivable and Allowance for Loan Losses - Summary of Allowance for Loan Losses by Portfolio Segment and Impairment Classification (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	$7,127	$10,217
Collectively evaluated for impairment	54,607	54,447
Total	61,734	64,664	70,348	74,351
Mortgage Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	4,696	7,829
Collectively evaluated for impairment	27,281	26,315
Total	31,977	34,144	37,962
Commercial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	2,318	2,221
Collectively evaluated for impairment	22,063	21,886
Total	24,381	24,107	20,315
Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	113	167
Collectively evaluated for impairment	4,768	4,762
Total	4,881	4,929	5,224
Total Portfolio Segments [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	7,127	10,217
Collectively evaluated for impairment	54,112	52,963
Total	61,239	63,180	63,501
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	495	1,484
Total	$495	$1,484	$6,847

Loans_Receivable_and_Allowance7

Loans Receivable and Allowance for Loan Losses - Schedule of Troubled Debt Restructurings (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
	SecurityLoan	SecurityLoan
Financing Receivable, Recorded Investment [Line Items]
Number of Loans	17	54
Pre-Modification Outstanding Recorded Investment	$4,293	$12,392
Post-Modification Outstanding Recorded Investment	3,742	12,364
Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Loans	14	42
Pre-Modification Outstanding Recorded Investment	3,034	9,097
Post-Modification Outstanding Recorded Investment	2,725	9,149
Commercial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Loans	1	1
Pre-Modification Outstanding Recorded Investment	865	330
Post-Modification Outstanding Recorded Investment	861	304
Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Loans	15	43
Pre-Modification Outstanding Recorded Investment	3,899	9,427
Post-Modification Outstanding Recorded Investment	3,586	9,453
Commercial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Loans	0	3
Pre-Modification Outstanding Recorded Investment	0	1,846
Post-Modification Outstanding Recorded Investment	0	1,816
Consumer Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Loans	2	8
Pre-Modification Outstanding Recorded Investment	394	1,119
Post-Modification Outstanding Recorded Investment	$156	$1,095

Loans_Receivable_and_Allowance8

Loans Receivable and Allowance for Loan Losses - Schedule of Troubled Debt Restructurings Subsequently Defaulted (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
	SecurityLoan	SecurityLoan
Financing Receivable, Modifications [Line Items]
Number of Loans	0	4
Outstanding Recorded Investment	$0	$1,945
Commercial Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	0	3
Outstanding Recorded Investment	0	1,815
Consumer Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	0	1
Outstanding Recorded Investment	$0	$130

Loans_Receivable_and_Allowance9

Loans Receivable and Allowance for Loan Losses - PCI Loans Acquired (Details) (Team Capital [Member], USD $)	30-May-14
In Thousands, unless otherwise specified
Team Capital [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Contractually required principal and interest	$12,505
Contractual cash flows not expected to be collected (non-accretable discount)	-6,475
Expected cash flows to be collected at acquisition	6,030
Fair value of acquired loans	-810
Interest component of expected cash flows (accretable yield)	$5,220

Recovered_Sheet1

Loans Receivable and Allowance for Loan Losses - Change in Accretable Yield (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Beginning balance	$0
Acquisition	810
Accretion	-592
Reclassification from non-accretable difference	477
Ending balance	$695

Recovered_Sheet2

Loans Receivable and Allowance for Loan Losses - Allowance for Loan Losses (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period				$64,664				$70,348	$64,664	$70,348	$74,351
Provision for loan losses	1,250	1,500	1,500	400	1,800	1,200	1,000	1,500	4,650	5,500	16,000
Recoveries of loans previously charged off									3,292	3,222	3,904
Loans charged off									-10,872	-14,406	-23,907
Balance at end of period	61,734				64,664				61,734	64,664	70,348
Mortgage Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period				34,144				37,962	34,144	37,962
Provision for loan losses									1,455	2,065
Recoveries of loans previously charged off									286	1,133
Loans charged off									-3,908	-7,016
Balance at end of period	31,977				34,144				31,977	34,144
Commercial Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period				24,107				20,315	24,107	20,315
Provision for loan losses									2,947	6,403
Recoveries of loans previously charged off									1,776	1,075
Loans charged off									-4,449	-3,686
Balance at end of period	24,381				24,107				24,381	24,107
Consumer Loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period				4,929				5,224	4,929	5,224
Provision for loan losses									1,237	2,395
Recoveries of loans previously charged off									1,230	1,014
Loans charged off									-2,515	-3,704
Balance at end of period	4,881				4,929				4,881	4,929
Total Portfolio Segments [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period				63,180				63,501	63,180	63,501
Provision for loan losses									5,639	10,863
Recoveries of loans previously charged off									3,292	3,222
Loans charged off									-10,872	-14,406
Balance at end of period	61,239				63,180				61,239	63,180
Unallocated [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period				1,484				6,847	1,484	6,847
Provision for loan losses									-989	-5,363
Recoveries of loans previously charged off									0	0
Loans charged off									0	0
Balance at end of period	$495				$1,484				$495	$1,484

Recovered_Sheet3

Loans Receivable and Allowance for Loan Losses - Summary of Impaired Loans Receivable by Class (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	$94,514	$116,056
Recorded Investment	85,395	106,370
Related Allowance	7,127	10,217
Average Recorded Investment	87,869	111,008
Interest Income Recognized	2,328	2,598
Residential [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	30,465	30,581
Recorded Investment	25,535	26,472
Related Allowance	2,367	2,571
Average Recorded Investment	26,244	26,932
Interest Income Recognized	912	856
Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	42,526	42,237
Recorded Investment	41,014	40,918
Related Allowance	2,329	2,309
Average Recorded Investment	41,387	41,561
Interest Income Recognized	914	979
Multi-Family [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	0	0
Recorded Investment	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Construction [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	0	9,810
Recorded Investment	0	8,449
Related Allowance	0	2,949
Average Recorded Investment	0	8,659
Interest Income Recognized	0	0
Mortgage Loans [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	72,991	82,628
Recorded Investment	66,549	75,839
Related Allowance	4,696	7,829
Average Recorded Investment	67,631	77,152
Interest Income Recognized	1,826	1,835
Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	18,708	30,942
Recorded Investment	16,462	28,210
Related Allowance	2,318	2,221
Average Recorded Investment	17,790	31,456
Interest Income Recognized	394	674
Consumer Loans [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	2,815	2,486
Recorded Investment	2,384	2,321
Related Allowance	113	167
Average Recorded Investment	2,448	2,400
Interest Income Recognized	108	89
Loans With No Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	23,881	27,293
Recorded Investment	18,346	21,958
Related Allowance	0	0
Average Recorded Investment	18,544	24,082
Interest Income Recognized	389	352
Loans With No Related Allowance [Member] | Residential [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	14,942	13,459
Recorded Investment	10,629	9,999
Related Allowance	0	0
Average Recorded Investment	11,138	10,322
Interest Income Recognized	357	299
Loans With No Related Allowance [Member] | Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	4,971	4,917
Recorded Investment	4,708	4,667
Related Allowance	0	0
Average Recorded Investment	4,713	4,834
Interest Income Recognized	0	3
Loans With No Related Allowance [Member] | Multi-Family [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	0	0
Recorded Investment	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Loans With No Related Allowance [Member] | Construction [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	0	0
Recorded Investment	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Loans With No Related Allowance [Member] | Mortgage Loans [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	19,913	18,376
Recorded Investment	15,337	14,666
Related Allowance	0	0
Average Recorded Investment	15,851	15,156
Interest Income Recognized	357	302
Loans With No Related Allowance [Member] | Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	2,718	8,163
Recorded Investment	2,179	6,674
Related Allowance	0	0
Average Recorded Investment	1,823	8,252
Interest Income Recognized	4	24
Loans With No Related Allowance [Member] | Consumer Loans [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	1,250	754
Recorded Investment	830	618
Related Allowance	0	0
Average Recorded Investment	870	674
Interest Income Recognized	28	26
Loans With Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	70,633	88,763
Recorded Investment	67,049	84,412
Related Allowance	7,127	10,217
Average Recorded Investment	69,325	86,926
Interest Income Recognized	1,939	2,246
Loans With Allowance Recorded [Member] | Residential [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	15,523	17,122
Recorded Investment	14,906	16,473
Related Allowance	2,367	2,571
Average Recorded Investment	15,106	16,610
Interest Income Recognized	555	557
Loans With Allowance Recorded [Member] | Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	37,555	37,320
Recorded Investment	36,306	36,251
Related Allowance	2,329	2,309
Average Recorded Investment	36,674	36,727
Interest Income Recognized	914	976
Loans With Allowance Recorded [Member] | Multi-Family [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	0	0
Recorded Investment	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Loans With Allowance Recorded [Member] | Construction [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	0	9,810
Recorded Investment	0	8,449
Related Allowance	0	2,949
Average Recorded Investment	0	8,659
Interest Income Recognized	0	0
Loans With Allowance Recorded [Member] | Mortgage Loans [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	53,078	64,252
Recorded Investment	51,212	61,173
Related Allowance	4,696	7,829
Average Recorded Investment	51,780	61,996
Interest Income Recognized	1,469	1,533
Loans With Allowance Recorded [Member] | Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	15,990	22,779
Recorded Investment	14,283	21,536
Related Allowance	2,318	2,221
Average Recorded Investment	15,967	23,204
Interest Income Recognized	390	650
Loans With Allowance Recorded [Member] | Consumer Loans [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	1,565	1,732
Recorded Investment	1,554	1,703
Related Allowance	113	167
Average Recorded Investment	1,578	1,726
Interest Income Recognized	$80	$63

Recovered_Sheet4

Loans Receivable and Allowance for Loan Losses - Summary of Loans Receivable by Credit Quality Risk Rating Indicator (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment [Line Items]
Total loans	$6,082,377	$5,196,663
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	71,704	50,951
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	110,364	137,362
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,092	649
Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Total Classified And Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	183,160	188,962
Acceptable/Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	5,899,217	5,007,701
Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Total mortgage loans	1,251,445	1,174,043
Residential [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total mortgage loans	4,331	5,062
Residential [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total mortgage loans	17,222	23,011
Residential [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total mortgage loans	0	0
Residential [Member] | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Total mortgage loans	0	0
Residential [Member] | Total Classified And Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total mortgage loans	21,553	28,073
Residential [Member] | Acceptable/Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total mortgage loans	1,229,892	1,145,970
Commercial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total mortgage loans	1,694,359	1,400,624
Commercial Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total mortgage loans	18,414	15,301
Commercial Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total mortgage loans	53,454	54,592
Commercial Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total mortgage loans	1,063	0
Commercial Loans [Member] | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Total mortgage loans	0	0
Commercial Loans [Member] | Total Classified And Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total mortgage loans	72,931	69,893
Commercial Loans [Member] | Acceptable/Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total mortgage loans	1,621,428	1,330,731
Multi-Family [Member]
Financing Receivable, Recorded Investment [Line Items]
Total mortgage loans	1,041,582	928,906
Multi-Family [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total mortgage loans	851	0
Multi-Family [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total mortgage loans	322	403
Multi-Family [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total mortgage loans	0	0
Multi-Family [Member] | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Total mortgage loans	0	0
Multi-Family [Member] | Total Classified And Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total mortgage loans	1,173	403
Multi-Family [Member] | Acceptable/Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total mortgage loans	1,040,409	928,503
Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total mortgage loans	221,102	183,289
Construction [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total mortgage loans	0	0
Construction [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total mortgage loans	2,600	8,449
Construction [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total mortgage loans	0	0
Construction [Member] | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Total mortgage loans	0	0
Construction [Member] | Total Classified And Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total mortgage loans	2,600	8,449
Construction [Member] | Acceptable/Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total mortgage loans	218,502	174,840
Total Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Total mortgage loans	4,208,488	3,686,862
Total Mortgages [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total mortgage loans	23,596	20,363
Total Mortgages [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total mortgage loans	73,598	86,455
Total Mortgages [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total mortgage loans	1,063	0
Total Mortgages [Member] | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Total mortgage loans	0	0
Total Mortgages [Member] | Total Classified And Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total mortgage loans	98,257	106,818
Total Mortgages [Member] | Acceptable/Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total mortgage loans	4,110,231	3,580,044
Commercial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,262,422	932,199
Commercial Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	45,599	28,551
Commercial Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	32,828	46,687
Commercial Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	29	649
Commercial Loans [Member] | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Commercial Loans [Member] | Total Classified And Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	78,456	75,887
Commercial Loans [Member] | Acceptable/Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,183,966	856,312
Consumer Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	611,467	577,602
Consumer Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,509	2,037
Consumer Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,938	4,220
Consumer Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Consumer Loans [Member] | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Consumer Loans [Member] | Total Classified And Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	6,447	6,257
Consumer Loans [Member] | Acceptable/Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	$605,020	$571,345

Banking_Premises_and_Equipment2

Banking Premises and Equipment (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Abstract]
Land	$15,767	$13,955
Banking premises	80,526	64,129
Leasehold improvements	42,836	31,565
Leasehold improvements	33,819	27,503
Construction in progress	4,053	3,687
Banking premises and equipment, gross	177,001	140,839
Less accumulated depreciation and amortization	84,011	74,391
Banking premises and equipment, net	92,990	66,448
Depreciation expense	$8,264	$7,152	$6,929

Intangible_Assets_Schedule_of_

Intangible Assets - Schedule of Intangible Assets (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$392,757	$352,609
Core deposit premiums	7,603	1,096
Customer relationship and other intangibles	2,987	1,563
Mortgage servicing rights	1,075	1,164
Intangible assets	$404,422	$356,432

Intangible_Assets_Amortization

Intangible Assets - Amortization Expense (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Goodwill and Intangible Assets Disclosure [Abstract]
Core deposit premiums	$1,472	$965	$1,698
Customer relationship and other intangibles	1,106	335	367
Mortgage servicing rights	179	324	401
Amortization expenses of intangible assets	$2,757	$1,624	$2,466

Intangible_Assets_Scheduled_of

Intangible Assets - Scheduled of Future Amortization (Detail) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Goodwill and Intangible Assets Disclosure [Abstract]
2015	$2,973
2016	2,071
2017	1,530
2018	1,102
2019	$925

Deposits_Schedule_of_Deposits_

Deposits - Schedule of Deposits (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Banking and Thrift [Abstract]
Savings deposits	$995,347	$921,993
Money market accounts	1,496,466	1,281,596
NOW accounts	1,425,424	1,326,941
Non-interest bearing deposits	1,049,597	865,187
Certificates of deposit	825,689	806,754
Total deposits	$5,792,523	$5,202,471
Weighted average interest rate, savings deposits	0.10%	0.09%
Weighted average interest rate, money market accounts	0.27%	0.25%
Weighted average interest rate, NOW accounts	0.27%	0.29%
Weighted average interest rate, non-interest bearing deposits	0.00%	0.00%
Weighted average interest rate, certificates of deposit	0.89%	0.97%

Deposits_Scheduled_Maturities_

Deposits - Scheduled Maturities of Certificates of Deposit (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Banking and Thrift [Abstract]
Within one year	$568,462	$529,896
One to three years	152,317	193,457
Three to five years	100,080	82,344
Five years and thereafter	4,830	1,057
Certificates of deposit	$825,689	$806,754

Deposits_Interest_Expense_on_D

Deposits - Interest Expense on Deposits (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Banking and Thrift [Abstract]
Savings deposits	$938	$960	$1,449
NOW and money market accounts	7,733	7,456	10,292
Certificates of deposits	6,661	9,615	13,607
Total interest expense on deposits	$15,332	$18,031	$25,348

Borrowed_Funds_Schedule_of_Bor

Borrowed Funds - Schedule of Borrowed Funds (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Debt Disclosure [Abstract]
Securities sold under repurchase agreements	$246,571	$246,322
FHLB line of credit	73,000	183,000
FHLB advances	1,190,280	774,557
Borrowed funds	$1,509,851	$1,203,879

Borrowed_Funds_Scheduled_FHLB_

Borrowed Funds - Scheduled FHLB Advances (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Due in one year or less	269,668
Due after one year through two years	150,398
Due after two years through three years	262,534
Due after three years through four years	211,220
Due after four years through five years	203,991
Thereafter	92,469
Total FHLB advances	1,190,280	$774,557
Minimum [Member]
Debt Instrument [Line Items]
Maturity date of FHLB advances	31-Jan-15
Maximum [Member]
Debt Instrument [Line Items]
Maturity date of FHLB advances	31-Aug-21

Borrowed_Funds_Scheduled_Secur

Borrowed Funds - Scheduled Securities Sold Under Repurchase Agreements (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Debt Instrument [Line Items]
Total scheduled maturities of securities	$246,571	$246,322
Securities Sold Under Repurchase Agreements [Member]
Debt Instrument [Line Items]
Due in one year or less	91,571
Due after one year through two years	75,000
Due after two years through three years	25,000
Due after three years through four years	20,000
Due after four years through five years	35,000
Thereafter	0
Total scheduled maturities of securities	$246,571

Borrowed_Funds_Debt_Disclosure

Borrowed Funds - Debt Disclosure by Year (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Debt Disclosure [Abstract]
Securities sold under repurchase agreements, maximum balance	$255,633	$294,034
FHLB line of credit, maximum balance	180,000	183,000
FHLB advances, maximum balance	1,190,280	774,557
Federal funds purchased, maximum balance	0	0
Securities sold under repurchase agreements, average balance	245,260	260,004
FHLB line of credit, average balance	104,121	48,784
FHLB advances, average balance	989,245	599,991
Federal funds purchased, Average balance	$0	$253
Securities sold under repurchase agreements, weighted average interest rate	1.72%	1.74%
FHLB line of credit, weighted average interest rate	0.37%	0.38%
FHLB advances, weighted average interest rate	2.08%	2.34%
Federal funds purchased, weighted average interest rate	0.00%	1.00%

Benefit_Plans_Additional_Infor

Benefit Plans - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2006	Dec. 31, 2002
Defined Benefit Plan Disclosure [Line Items]
Service period for employees of coverage age, years		1 year
Vesting percentage of participants in pension plan		100.00%
Lump sum payment		$4,300,000
Lump sum pension distribution		1,300,000
Requisite service period for deferred compensation arrangement		10 years			10 years	10 years
Defined benefit plan age attained for coverage		21 years
Actuarial gain (loss) during the period	-3,000,000	-1,500,000
Discount rate		4.00%
Percentage of matching contribution			25.00%	25.00%
Percentage of contribution made by the participants in benefit plans			6.00%	6.00%
Retirement plan for the board of directors to get maximum payments minimum age		72 years
Benefit plans compensation expense		1,250
Period in which undistributed balance of accrued benefit will be distributed		60 days
Shares purchased under ESOP		4,769,464
Average price per share purchased under ESOP		$17.09
Outstanding loan principal		53,400,000
Number of shares released under ESOP		201,512	195,065
Unallocated ESOP shares held in suspense		2,652,045
Fair market value of ESOP shares		47,900,000
ESOP compensation expenses		2,654,000	2,559,000	2,030,000
Estimated expense under the supplemental ESOP provision		48,000	45,000	28,000
Number of shares authorized for issuance under stock award plan		3,686,510
Limited number of shares authorized for issuance		2,100,000
Unrecognized compensation cost relating go unvested restricted stock		1,100,000
Weighted average period in which unrecognized compensation cost recognized yrs		1 year 1 month 6 days
Fair value of options vesting		438,000	696,000	551,000
Projected share based compensation expense, 2015		179,000
Projected share based compensation expense, 2016		70,000
Projected share based compensation expense, 2017		41,000
Aggregate intrinsic value of stock options outstanding		3,840,000
Aggregate intrinsic value of stock options exercisable		3,064,000
Weighted average fair value of options granted		$1.64	$3.49	$3.37
Retirement Plan for the Board of Directors [Member]
Defined Benefit Plan Disclosure [Line Items]
Increase (decrease) in other comprehensive income from retirement plans		-7,000	6,000	3,000
Restricted Stock [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Share based payment award vesting period in years		3 years
Restricted Stock [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Share based payment award vesting period in years		5 years
Outstanding Stock Awards [Member]
Defined Benefit Plan Disclosure [Line Items]
Share based payment award compensation expense		6,359,000	4,869,000	3,658,000
Stock Options [Member]
Defined Benefit Plan Disclosure [Line Items]
Share based payment award vesting period in years		5 years
Share based payment award expiration period in years		10 years
Share based payment award compensation expense		298,000	297,000	452,000
401(k) Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of matching contribution		25.00%
Percentage of contribution made by the participants in benefit plans		6.00%
Contribution to the Plan		674,000	587,000	601,000
Estimated expense of supplemental ESOP provision		11,000	7,000	8,000
Supplemental Executive Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Aggregate contributions to the benefit plan		102,000	162,000	169,000
Increase (decrease) in other comprehensive income from retirement plans		-198,000	56,000	-49,000
Other Liabilities [Member]
Defined Benefit Plan Disclosure [Line Items]
Retirement plan liabilities		2,166,000	2,207,000
Other Liabilities [Member] | Retirement Plan for the Board of Directors [Member]
Defined Benefit Plan Disclosure [Line Items]
Retirement plan liabilities		169,000	181,000
Board of Directors [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit plans compensation expense		$15,000	$15,000	$15,000

Benefit_Plans_Benefit_Obligati

Benefit Plans - Benefit Obligation and Plan Asset Rollforward (Detail) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Change in benefit obligation:
Actuarial loss (gain)	$3,000	$1,500
Change in plan assets:
Fair value of plan assets at beginning of year	45,202	45,202
Fair value of plan assets at end of year		42,744
Pension [Member]
Change in benefit obligation:
Benefit obligation at beginning of year	28,605	28,605	32,189	28,277
Service cost		0	0	0
Interest cost		1,271	1,273	1,287
Actuarial loss (gain)		51	114	779
Benefits paid		-5,326	-969	-891
Change in actuarial assumptions		4,320	-4,002	2,737
Benefit obligation at end of year		28,921	28,605	32,189
Change in plan assets:
Fair value of plan assets at beginning of year	45,202	45,202	40,072	32,666
Actual return on plan assets		2,868	6,099	4,184
Employer contributions		0	0	4,113
Benefits paid		-5,326	-969	-891
Fair value of plan assets at end of year		42,744	45,202	40,072
Funded status at end of year		13,823	16,597	7,883
Post-retirement [Member]
Change in benefit obligation:
Benefit obligation at beginning of year	22,086	22,086	25,116	23,327
Service cost		169	240	252
Interest cost		1,087	981	1,043
Actuarial loss (gain)		51	-210	231
Benefits paid		-670	-624	-634
Change in actuarial assumptions		5,610	-3,417	897
Benefit obligation at end of year		28,333	22,086	25,116
Change in plan assets:
Fair value of plan assets at beginning of year	0	0	0	0
Actual return on plan assets		0	0	0
Employer contributions		670	624	634
Benefits paid		-670	-624	-634
Fair value of plan assets at end of year		0	0	0
Funded status at end of year		($28,333)	($22,086)	($25,116)

Benefit_Plans_Components_of_Ac

Benefit Plans - Components of Accumulated Other Comprehensive Loss (Gain) (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Unrecognized prior service cost	$0	$0
Unrecognized net actuarial loss (gain)	10,887	7,699
Total accumulated other comprehensive loss (gain)	10,887	7,699
Post-retirement [Member]
Defined Benefit Plan Disclosure [Line Items]
Unrecognized prior service cost	-1	-5
Unrecognized net actuarial loss (gain)	1,788	-4,076
Total accumulated other comprehensive loss (gain)	$1,787	($4,081)

Benefit_Plans_Net_Periodic_Ben

Benefit Plans - Net Periodic Benefit Cost (Increase) (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Lump sum pension distribution	$1,300
Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0
Interest cost	1,271	1,273	1,287
Return on plan assets	-3,463	-3,167	-2,578
Amortization of net gain (loss)	441	1,352	1,428
Lump sum pension distribution	1,336	0	0
Amortization of unrecognized prior service cost	0	0	0
Net periodic benefit cost (increase)	-415	-542	137
Post-retirement [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	169	240	252
Interest cost	1,087	981	1,043
Return on plan assets	0	0	0
Amortization of net gain (loss)	-204	15	12
Lump sum pension distribution	0	0	0
Amortization of unrecognized prior service cost	-4	-4	-4
Net periodic benefit cost (increase)	$1,048	$1,232	$1,303

Benefit_Plans_Actuarial_Assump

Benefit Plans - Actuarial Assumptions Used (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.00%
Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.00%	5.00%	4.00%
Rate of compensation increase	0.00%	0.00%	0.00%
Expected return on plan assets	8.00%	8.00%	8.00%
Medical and life insurance benefits cost rate of increase	0.00%	0.00%	0.00%
Post-retirement [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.00%	5.00%	4.00%
Rate of compensation increase	0.00%	0.00%	0.00%
Expected return on plan assets	0.00%	0.00%	0.00%
Medical and life insurance benefits cost rate of increase	6.00%	6.00%	6.50%

Benefit_Plans_Effect_of_OnePer

Benefit Plans - Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rate (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Effect on total service cost and interest cost, 1% increase	$220
Effect on post-retirement benefits obligation, 1% increase	5,260
Effect on total service cost and interest cost, 1% decrease	-180
Effect on post-retirement benefits obligation, 1% decrease	($4,160)

Benefit_Plans_Estimated_Future

Benefit Plans - Estimated Future Benefit Payments (Detail) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
2015	$1,080,000
2016	1,141,000
2017	1,188,000
2018	1,225,000
2019	1,269,000
Post-retirement [Member]
Defined Benefit Plan Disclosure [Line Items]
2015	816,000
2016	849,000
2017	882,000
2018	920,000
2019	$967,000

Benefit_Plans_WeightedAverage_

Benefit Plans - Weighted-Average Asset Allocation of Pension Plan Assets (Detail)	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Equities	100.00%	100.00%
Domestic equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Equities	41.00%	44.00%
Foreign equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Equities	12.00%	14.00%
Fixed income [Member]
Defined Benefit Plan Disclosure [Line Items]
Equities	45.00%	40.00%
Real estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Equities	2.00%	2.00%
Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Equities	0.00%	0.00%

Benefit_Plans_Target_Allocatio

Benefit Plans - Target Allocation of Assets and Acceptable Ranges (Detail)	12 Months Ended
	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Target allocation of assets	100.00%
Domestic equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of assets	44.00%
Target allocation of assets, range minimum	35.00%
Target allocation of assets, range maximum	55.00%
Foreign equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of assets	14.00%
Target allocation of assets, range minimum	5.00%
Target allocation of assets, range maximum	25.00%
Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of assets	40.00%
Target allocation of assets, range minimum	30.00%
Target allocation of assets, range maximum	50.00%
Real estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of assets	2.00%
Target allocation of assets, range minimum	0.00%
Target allocation of assets, range maximum	10.00%
Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of assets	0.00%
Target allocation of assets, range minimum	0.00%
Target allocation of assets, range maximum	35.00%

Benefit_Plans_Assets_Measured_

Benefit Plans - Assets Measured at Fair Value on Recurring Basis (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Defined Benefit Plan Disclosure [Line Items]
Total investments	$42,744	$45,202
Group Annuity Contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	152	180
Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	8,368	19,179
Pooled Separate Accounts [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	34,224	25,843
Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	8,368	19,179
Level 1 [Member] | Group Annuity Contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	0	0
Level 1 [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	8,368	19,179
Level 1 [Member] | Pooled Separate Accounts [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	0	0
Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	34,376	26,023
Level 2 [Member] | Group Annuity Contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	152	180
Level 2 [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	0	0
Level 2 [Member] | Pooled Separate Accounts [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	34,224	25,843
Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	0	0
Level 3 [Member] | Group Annuity Contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	0	0
Level 3 [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	0	0
Level 3 [Member] | Pooled Separate Accounts [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	0	0
Fixed Income [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments		9,210
Fixed Income [Member] | Pooled Separate Accounts [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	19,789	8,624
Fixed Income [Member] | Level 1 [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments		9,210
Fixed Income [Member] | Level 1 [Member] | Pooled Separate Accounts [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	0	0
Fixed Income [Member] | Level 2 [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments		0
Fixed Income [Member] | Level 2 [Member] | Pooled Separate Accounts [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	19,789	8,624
Fixed Income [Member] | Level 3 [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments		0
Fixed Income [Member] | Level 3 [Member] | Pooled Separate Accounts [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	0	0
International Equity [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	5,370	6,316
International Equity [Member] | Level 1 [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	5,370	6,316
International Equity [Member] | Level 2 [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	0	0
International Equity [Member] | Level 3 [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	0	0
Large U S Equity [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	1,689	1,809
Large U S Equity [Member] | Pooled Separate Accounts [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	11,857	14,509
Large U S Equity [Member] | Level 1 [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	1,689	1,809
Large U S Equity [Member] | Level 1 [Member] | Pooled Separate Accounts [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	0	0
Large U S Equity [Member] | Level 2 [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	0	0
Large U S Equity [Member] | Level 2 [Member] | Pooled Separate Accounts [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	11,857	14,509
Large U S Equity [Member] | Level 3 [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	0	0
Large U S Equity [Member] | Level 3 [Member] | Pooled Separate Accounts [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	0	0
Small Mid U S Equity [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	1,309	1,844
Small Mid U S Equity [Member] | Pooled Separate Accounts [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	2,578	2,710
Small Mid U S Equity [Member] | Level 1 [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	1,309	1,844
Small Mid U S Equity [Member] | Level 1 [Member] | Pooled Separate Accounts [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	0	0
Small Mid U S Equity [Member] | Level 2 [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	0	0
Small Mid U S Equity [Member] | Level 2 [Member] | Pooled Separate Accounts [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	2,578	2,710
Small Mid U S Equity [Member] | Level 3 [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	0	0
Small Mid U S Equity [Member] | Level 3 [Member] | Pooled Separate Accounts [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	$0	$0

Benefit_Plans_Status_of_Unvest

Benefit Plans - Status of Unvested Stock Awards (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Compensation and Retirement Disclosure [Abstract]
Restricted stock awards, outstanding at beginning of year	782,213	846,883	904,411
Granted	426,726	386,669	373,510
Forfeited	-126,743	-68,954	-220,590
Vested	-235,734	-382,385	-210,448
Restricted stock awards, outstanding at the end of year	846,462	782,213	846,883

Benefit_Plans_Status_of_Unexer

Benefit Plans - Status of Unexercised Stock Options (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Compensation and Retirement Disclosure [Abstract]
Number of stock options, outstanding at beginning of year	1,233,742	4,152,016	4,248,898
Number of stock options, granted	171,935	85,250	80,081
Number of stock options, exercised	-9,678	-28,464	-2,000
Number of stock options, forfeited	-4,178	-53,444	-109,655
Number of stock options, expired	-107,500	-2,921,616	-65,308
Number of stock options, outstanding at the end of year	1,284,321	1,233,742	4,152,016
Weighted average exercise price, outstanding at beginning of year	$15.24	$17.50	$17.37
Weighted average exercise price, granted	$16.44	$15.23	$14.86
Weighted average exercise price, exercised	$12.11	$12.41	$12.54
Weighted average exercise price, forfeited	$14.50	$10.34	$10.41
Weighted average exercise price, expired	$16.54	$18.57	$18.32
Weighted average exercise price, outstanding at the end of year	$15.32	$15.24	$17.50

Benefit_Plans_Stock_Options_Ou

Benefit Plans - Stock Options Outstanding (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014
$ 10.27-15.14 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, minimum	$10.27
Range of exercise prices, maximum	$15.23
Number of options outstanding	638,382
Options Outstanding, average remaining contractual life, yrs	5 years 3 months 18 days
Options Outstanding, weighted average exercise price	$12.57
Number of options exercisable	476,716
Options exercisable, weighted average exercise price	$11.75
$ 17.43-19.22 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, minimum	$16.38
Range of exercise prices, maximum	$18.87
Number of options outstanding	645,939
Options Outstanding, average remaining contractual life, yrs	3 years 7 months 18 days
Options Outstanding, weighted average exercise price	$17.67
Number of options exercisable	478,504
Options exercisable, weighted average exercise price	$18.12

Benefit_Plans_Weighted_Average

Benefit Plans - Weighted Average Assumptions of Fair Value Option Grants (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Compensation and Retirement Disclosure [Abstract]
Expected dividend yield	3.66%	3.41%	3.26%
Expected volatility	20.04%	33.38%	32.51%
Risk-free interest rate	0.96%	0.88%	0.86%
Expected option life	6 years 6 months	8 years	8 years

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating Loss Carryforwards [Line Items]
Accumulated other comprehensive income, deferred tax (benefit) expense	$7,075,000	$13,824,000	($587,000)
Accumulated other comprehensive income, a deferred tax expense (benefit)	-3,800,000	4,968,000	-694,000
Retained earnings amount for which no provision for income tax has been made	51,800,000
Unrecognized tax liability	21,160,000
Valuation reserve	242,000	242,000
Valuation allowance associated with net operating losses	648,000
Federal [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, limitations on use	900,000
State [Member] | New Jersey [Member]
Operating Loss Carryforwards [Line Items]
Unused capital loss carryforwards	3,300,000
State [Member] | Pennsylvania [Member]
Operating Loss Carryforwards [Line Items]
Unused capital loss carryforwards	3,000,000
Team Capital [Member]
Operating Loss Carryforwards [Line Items]
Acquired gross tax asset	486,000
Beacon Trust [Member]
Operating Loss Carryforwards [Line Items]
Unused capital loss carryforwards	$3,900,000

Income_Taxes_Current_and_Defer

Income Taxes - Current and Deferred Tax Expense (Benefit) (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current:
Current Federal									$27,577	$27,667	$29,813
Current State									542	2,168	176
Total current									28,119	29,835	29,989
Deferred:
Deferred Federal									1,678	4,210	-3,208
Deferred State									1,988	1,321	2,074
Total deferred									3,666	5,531	-1,134
Income tax expense (benefit)	$9,968	$7,913	$6,206	$7,698	$7,806	$11,987	$8,007	$7,566	$31,785	$35,366	$28,855

Income_Taxes_Reconciliation_Fr

Income Taxes - Reconciliation From Statutory Rate to Effective Tax (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Tax expense at statutory rate of 35%									$36,896	$37,065	$33,643
State tax, net of federal income tax benefit									1,621	2,268	1,462
Tax-exempt interest income									-4,916	-4,084	-3,937
Bank-owned life insurance									-1,972	-2,309	-1,847
Non-qualified stock option expiration									0	2,746	0
Other, net									156	-320	-466
Income tax expense (benefit)	$9,968	$7,913	$6,206	$7,698	$7,806	$11,987	$8,007	$7,566	$31,785	$35,366	$28,855
Statutory interest rate									35.00%	35.00%	35.00%

Income_Taxes_Deferred_Tax_Asse

Income Taxes - Deferred Tax Assets and Liabilities (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Deferred tax assets:
Allowance for loan losses	$24,160	$25,848
Post-retirement benefit	10,658	10,690
Deferred compensation	3,009	3,037
Intangibles	499	511
Purchase accounting adjustments	387	426
Depreciation	3,963	3,396
SERP	949	958
ESOP	3,264	3,253
Stock-based compensation	5,734	5,558
Non-accrual interest	5,202	6,756
Unrealized loss on securities	0	1,939
State NOL	430	237
Federal NOL	1,376	1,692
Pension liability adjustments	5,178	1,438
Other	1,073	1,345
Total gross deferred tax assets	65,882	67,084
Valuation Reserve	-242	-242
Deferred tax liabilities:
Pension expense	9,925	9,925
Deferred loan costs	4,089	3,936
Investment securities, principally due to accretion of discounts	311	235
Originated mortgage servicing rights	395	447
Unrealized gain on securities	5,191	0
Total gross deferred tax liabilities	19,911	14,543
Net deferred tax asset	$45,729	$52,299

Lease_Commitments_Detail

Lease Commitments (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Leases [Abstract]
2015	$6,521
2016	6,455
2017	5,960
2018	5,351
2019	5,093
Thereafter	12,887
Total future minimum rental commitments	42,267
Rental expense	$8,056	$6,850	$7,115

Regulatory_Capital_Requirement2

Regulatory Capital Requirements - Additional Information (Detail) (FDIC [Member])	Dec. 31, 2014	Dec. 31, 2013
FDIC [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Leverage (Tier 1), minimum capital adequacy requirements, Ratio	4.00%	4.00%
Risk-based capital: Tier 1, minimum capital adequacy requirements, Ratio	4.00%	4.00%
Risk-based capital: Total, minimum capital adequacy requirements, Ratio	8.00%	8.00%
Leverage (Tier 1), To be well-capitalized under prompt corrective action provisions, Ratio	5.00%	5.00%
Risk-based capital: Tier 1, To be well-capitalized under prompt corrective action provisions, Ratio	6.00%	6.00%
Risk-based capital: Total, To be well-capitalized under prompt corrective action provisions, Ratio	10.00%	10.00%

Regulatory_Capital_Requirement3

Regulatory Capital Requirements - Actual Capital Amounts and Ratios and FDIC Minimum Capital Adequacy Requirements (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
FRB [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Leverage (Tier 1), Actual Amount	$740,958	$660,549
Leverage (Tier 1), Actual Ratio	9.21%	9.42%
Leverage (Tier 1), minimum capital adequacy requirements, Amount	321,809	280,572
Leverage (Tier 1), minimum capital adequacy requirements, Ratio	4.00%	4.00%
Leverage (Tier 1), To be well-capitalized under prompt corrective action provisions, Amount	402,262	350,715
Leverage (Tier 1), To be well-capitalized under prompt corrective action provisions, Ratio	5.00%	5.00%
Risk-based capital: Tier 1, Actual Amount	740,958	660,549
Risk-based capital: Tier 1, Actual, Ratio	12.06%	12.89%
Risk-based capital: Tier 1, minimum capital adequacy requirements, Amount	245,859	204,967
Risk-based capital: Tier 1, minimum capital adequacy requirements, Ratio	4.00%	4.00%
Risk-based capital: Tier 1, To be well-capitalized under prompt corrective action provisions, Amount	368,788	307,451
Risk-based capital: Tier 1, To be well-capitalized under prompt corrective action provisions, Ratio	6.00%	6.00%
Risk-based capital: Total, Actual Amount	802,692	724,609
Risk-based capital: Total, Actual, Ratio	13.06%	14.14%
Risk-based capital: Total, minimum capital adequacy requirements, Amount	491,717	409,934
Risk-based capital: Total, minimum capital adequacy requirements, Ratio	8.00%	8.00%
Risk-based capital: Total, to be well-capitalized under prompt corrective action provisions, Amount	614,646	512,418
Risk-based capital: Total, To be well-capitalized under prompt corrective action provisions, Ratio	10.00%	10.00%
FDIC [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Leverage (Tier 1), Actual Amount	674,483	585,313
Leverage (Tier 1), Actual Ratio	8.38%	8.34%
Leverage (Tier 1), minimum capital adequacy requirements, Amount	321,805	280,578
Leverage (Tier 1), minimum capital adequacy requirements, Ratio	4.00%	4.00%
Leverage (Tier 1), To be well-capitalized under prompt corrective action provisions, Amount	402,257	350,723
Leverage (Tier 1), To be well-capitalized under prompt corrective action provisions, Ratio	5.00%	5.00%
Risk-based capital: Tier 1, Actual Amount	674,483	585,313
Risk-based capital: Tier 1, Actual, Ratio	10.97%	11.42%
Risk-based capital: Tier 1, minimum capital adequacy requirements, Amount	245,853	204,967
Risk-based capital: Tier 1, minimum capital adequacy requirements, Ratio	4.00%	4.00%
Risk-based capital: Tier 1, To be well-capitalized under prompt corrective action provisions, Amount	368,779	307,450
Risk-based capital: Tier 1, To be well-capitalized under prompt corrective action provisions, Ratio	6.00%	6.00%
Risk-based capital: Total, Actual Amount	736,217	649,373
Risk-based capital: Total, Actual, Ratio	11.98%	12.67%
Risk-based capital: Total, minimum capital adequacy requirements, Amount	491,705	409,933
Risk-based capital: Total, minimum capital adequacy requirements, Ratio	8.00%	8.00%
Risk-based capital: Total, to be well-capitalized under prompt corrective action provisions, Amount	$614,631	$512,417
Risk-based capital: Total, To be well-capitalized under prompt corrective action provisions, Ratio	10.00%	10.00%

Fair_Value_Measurements_Additi

Fair Value Measurements - Additional Information (Detail) (Maximum [Member])	12 Months Ended
	Dec. 31, 2014
Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Estimated costs	6.00%

Fair_Value_Measurements_Assets

Fair Value Measurements - Assets and Liabilities at Fair Values (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	$1,074,395	$1,157,594
Foreclosed assets	5,098	5,486
Measured on A Recurring Basis[Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	1,074,395	1,157,594
Asset derivative	2,046
Assets, fair value disclosure	1,076,441
Liability derivative	2,052
Measured on A Recurring Basis[Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	0	0
Assets, fair value disclosure	0
Measured on A Recurring Basis[Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	970,779	1,063,732
Asset derivative	2,046
Assets, fair value disclosure	972,825
Liability derivative	2,052
Measured on A Recurring Basis[Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	103,616	93,862
Asset derivative	0
Assets, fair value disclosure	103,616
Measured on A Non-recurring Basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans measured for impairment based on the fair value of the underlying collateral	23,086	29,782
Foreclosed assets	5,098	5,486
Fair value assets, nonrecurring	28,184	35,268
Measured on A Non-recurring Basis [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans measured for impairment based on the fair value of the underlying collateral	23,086	29,782
Foreclosed assets	5,098	5,486
Fair value assets, nonrecurring	28,184	35,268
Measured on A Non-recurring Basis [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans measured for impairment based on the fair value of the underlying collateral	0	0
Foreclosed assets	0	0
Fair value assets, nonrecurring	0	0
Measured on A Non-recurring Basis [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans measured for impairment based on the fair value of the underlying collateral	0	0
Foreclosed assets	0	0
Fair value assets, nonrecurring	0	0
US Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	8,016
US Treasury Securities [Member] | Measured on A Recurring Basis[Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	8,016
US Treasury Securities [Member] | Measured on A Recurring Basis[Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	0
US Treasury Securities [Member] | Measured on A Recurring Basis[Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	0
US Treasury Securities [Member] | Measured on A Recurring Basis[Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	8,016
Agency Obligations [Member] | Measured on A Recurring Basis[Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	95,076	93,416
Agency Obligations [Member] | Measured on A Recurring Basis[Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	0	0
Agency Obligations [Member] | Measured on A Recurring Basis[Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	0	0
Agency Obligations [Member] | Measured on A Recurring Basis[Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	95,076	93,416
Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	957,257	1,054,974
Mortgage-Backed Securities [Member] | Measured on A Recurring Basis[Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	957,257	1,054,974
Mortgage-Backed Securities [Member] | Measured on A Recurring Basis[Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	0	0
Mortgage-Backed Securities [Member] | Measured on A Recurring Basis[Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	957,257	1,054,974
Mortgage-Backed Securities [Member] | Measured on A Recurring Basis[Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	0	0
State and Municipal Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	7,002	8,758
State and Municipal Obligations [Member] | Measured on A Recurring Basis[Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	7,002	8,758
State and Municipal Obligations [Member] | Measured on A Recurring Basis[Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	0	0
State and Municipal Obligations [Member] | Measured on A Recurring Basis[Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	7,002	8,758
State and Municipal Obligations [Member] | Measured on A Recurring Basis[Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	0	0
Corporate Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	6,520
Corporate Obligations [Member] | Measured on A Recurring Basis[Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	6,520
Corporate Obligations [Member] | Measured on A Recurring Basis[Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	6,520
Equities [Member] | Measured on A Recurring Basis[Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	524	446
Equities [Member] | Measured on A Recurring Basis[Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	0	0
Equities [Member] | Measured on A Recurring Basis[Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	0	0
Equities [Member] | Measured on A Recurring Basis[Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, at fair value	$524	$446

Fair_Value_Measurements_Schedu

Fair Value Measurements - Schedule of Financial Instruments, Carrying and Fair Values (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$103,762	$101,224	$103,823	$69,632
Securities available for sale	1,074,395	1,157,594
Investment securities held to maturity	469,528	357,500
FHLBNY stock	69,789	58,070
Loans, net of allowance for loan losses	6,023,771	5,130,149
Certificates of deposit	825,689	806,754
Total deposits	5,792,523	5,202,471
Borrowings	1,509,851	1,203,879
US Treasury Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	8,016
Mortgage-Backed Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	957,257	1,054,974
State and Municipal Obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	7,002	8,758
Corporate Obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	6,520
Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	103,762	101,224
Securities available for sale	1,074,395	1,157,594
Investment securities held to maturity	469,528	357,500
FHLBNY stock	69,789	58,070
Loans, net of allowance for loan losses	6,023,771	5,130,149
Asset derivative	2,046
Deposits other than certificates of deposits	4,966,834	4,395,717
Certificates of deposit	825,689	806,754
Total deposits	5,792,523	5,202,471
Borrowings	1,509,851	1,203,879
Liability derivative	2,052
Carrying Value [Member] | US Treasury Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	8,016
Carrying Value [Member] | Agency Obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	95,076	93,416
Investment securities held to maturity	6,813	7,523
Carrying Value [Member] | Mortgage-Backed Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	957,257	1,054,974
Investment securities held to maturity	2,816	5,273
Carrying Value [Member] | State and Municipal Obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	7,002	8,758
Investment securities held to maturity	449,410	334,750
Carrying Value [Member] | Corporate Obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	6,520
Investment securities held to maturity	10,489	9,954
Carrying Value [Member] | Equity Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	524	446
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	103,762	101,224
Securities available for sale	1,074,395	1,157,594
Investment securities held to maturity	482,473	355,913
FHLBNY stock	69,789	58,070
Loans, net of allowance for loan losses	6,104,558	5,221,228
Asset derivative	2,046
Deposits other than certificates of deposits	4,966,834	4,395,717
Certificates of deposit	830,233	813,337
Total deposits	5,797,067	5,209,054
Borrowings	1,516,966	1,218,136
Liability derivative	2,052
Fair Value [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	103,762	101,224
Securities available for sale	103,616	93,862
Investment securities held to maturity	6,810	7,470
FHLBNY stock	69,789	58,070
Loans, net of allowance for loan losses	0	0
Deposits other than certificates of deposits	4,966,834	4,395,717
Certificates of deposit	0	0
Total deposits	4,966,834	4,395,717
Borrowings	0	0
Fair Value [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Securities available for sale	970,779	1,063,732
Investment securities held to maturity	475,663	348,443
FHLBNY stock	0	0
Loans, net of allowance for loan losses	0	0
Asset derivative	2,046
Deposits other than certificates of deposits	0	0
Certificates of deposit	830,233	813,337
Total deposits	830,233	813,337
Borrowings	1,516,966	1,218,136
Liability derivative	2,052
Fair Value [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Securities available for sale	0	0
Investment securities held to maturity	0	0
FHLBNY stock	0	0
Loans, net of allowance for loan losses	6,104,558	5,221,228
Deposits other than certificates of deposits	0	0
Certificates of deposit	0	0
Total deposits	0	0
Borrowings	0	0
Fair Value [Member] | US Treasury Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	8,016
Fair Value [Member] | US Treasury Securities [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	8,016
Fair Value [Member] | US Treasury Securities [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	0
Fair Value [Member] | US Treasury Securities [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	0
Fair Value [Member] | Agency Obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	95,076	93,416
Investment securities held to maturity	6,810	7,470
Fair Value [Member] | Agency Obligations [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	95,076	93,416
Investment securities held to maturity	6,810	7,470
Fair Value [Member] | Agency Obligations [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	0	0
Investment securities held to maturity	0	0
Fair Value [Member] | Agency Obligations [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	0	0
Investment securities held to maturity	0	0
Fair Value [Member] | Mortgage-Backed Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	957,257	1,054,974
Investment securities held to maturity	2,939	5,520
Fair Value [Member] | Mortgage-Backed Securities [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	0	0
Investment securities held to maturity	0	0
Fair Value [Member] | Mortgage-Backed Securities [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	957,257	1,054,974
Investment securities held to maturity	2,939	5,520
Fair Value [Member] | Mortgage-Backed Securities [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	0	0
Investment securities held to maturity	0	0
Fair Value [Member] | State and Municipal Obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	7,002	8,758
Investment securities held to maturity	462,238	332,987
Fair Value [Member] | State and Municipal Obligations [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	0	0
Investment securities held to maturity	0	0
Fair Value [Member] | State and Municipal Obligations [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	7,002	8,758
Investment securities held to maturity	462,238	332,987
Fair Value [Member] | State and Municipal Obligations [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	0	0
Investment securities held to maturity	0	0
Fair Value [Member] | Corporate Obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	6,520
Investment securities held to maturity	10,486	9,936
Fair Value [Member] | Corporate Obligations [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	0
Investment securities held to maturity	0	0
Fair Value [Member] | Corporate Obligations [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	6,520
Investment securities held to maturity	10,486	9,936
Fair Value [Member] | Corporate Obligations [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	0
Investment securities held to maturity	0	0
Fair Value [Member] | Equity Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	524	446
Fair Value [Member] | Equity Securities [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	524	446
Fair Value [Member] | Equity Securities [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	0	0
Fair Value [Member] | Equity Securities [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	$0	$0

Selected_Quarterly_Financial_D2

Selected Quarterly Financial Data (Unaudited) (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]
Interest income	$73,800	$73,652	$67,386	$64,523	$64,076	$62,984	$62,413	$63,304	$279,361	$252,777	$262,259
Interest expense	10,482	10,683	9,985	9,322	9,369	8,987	9,002	9,409	40,472	36,767	44,922
Net interest income	63,318	62,969	57,401	55,201	54,707	53,997	53,411	53,895	238,889	216,010	217,337
Provision for loan losses	1,250	1,500	1,500	400	1,800	1,200	1,000	1,500	4,650	5,500	16,000
Net interest income after provision for loan losses	62,068	61,469	55,901	54,801	52,907	52,797	52,411	52,395	234,239	210,510	201,337
Non-interest income	11,416	11,309	10,327	8,116	9,841	11,730	12,637	9,945	41,168	44,153	43,613
Non-interest expense	42,297	45,833	43,671	38,190	37,540	36,464	37,813	36,946	169,991	148,763	148,828
Income before income tax expense	31,187	26,945	22,557	24,727	25,208	28,063	27,235	25,394	105,416	105,900	96,122
Income tax expense	9,968	7,913	6,206	7,698	7,806	11,987	8,007	7,566	31,785	35,366	28,855
Net income	$21,219	$19,032	$16,351	$17,029	$17,402	$16,076	$19,228	$17,828	$73,631	$70,534	$67,267
Basic earnings per share	$0.34	$0.30	$0.28	$0.30	$0.30	$0.28	$0.34	$0.31	$1.22	$1.23	$1.18
Diluted earnings per share	$0.34	$0.30	$0.28	$0.30	$0.30	$0.28	$0.34	$0.31	$1.22	$1.23	$1.18

Earnings_Per_Share_Detail

Earnings Per Share (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share [Abstract]
Net income	$21,219	$19,032	$16,351	$17,029	$17,402	$16,076	$19,228	$17,828	$73,631	$70,534	$67,267
Basic weighted average common shares outstanding									60,388,398	57,236,909	57,145,868
Dilutive shares									173,672	124,534	53,936
Diluted weighted average common shares outstanding									60,562,070	57,361,443	57,199,804
Diluted weighted average common shares outstanding
Basic	$0.34	$0.30	$0.28	$0.30	$0.30	$0.28	$0.34	$0.31	$1.22	$1.23	$1.18
Diluted	$0.34	$0.30	$0.28	$0.30	$0.30	$0.28	$0.34	$0.31	$1.22	$1.23	$1.18
Anti-dilutive stock options and awards excluded from computation of earnings per share									988,931	659,531	3,891,443

Parentonly_Financial_Informati2

Parent-only Financial Information - Financial Condition (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
ASSETS
Cash and due from banks	$102,484	$100,053
Securities available for sale, at fair value	1,074,395	1,157,594
Other assets	76,682	80,958
Total assets	8,523,377	7,487,328
LIABILITIES AND STOCKHOLDERS’ EQUITY
Other liabilities	7,379,278	6,476,575
Total stockholders’ equity	1,144,099	1,010,753	981,246	952,477
Total liabilities and stockholders’ equity	8,523,377	7,487,328
Provident Financial Services, Inc. [Member]
ASSETS
Cash and due from banks	10,475	12,796
Securities available for sale, at fair value	524	446
Investment in subsidiary	1,077,624	935,517
Due from subsidiary—SAP	2,794	6,269
ESOP loan	53,438	56,716
Other assets	34	59
Total assets	1,144,889	1,011,803
LIABILITIES AND STOCKHOLDERS’ EQUITY
Other liabilities	790	1,050
Total stockholders’ equity	1,144,099	1,010,753
Total liabilities and stockholders’ equity	$1,144,889	$1,011,803

Parentonly_Financial_Informati3

Parent-only Financial Information - Statements of Operations (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Condensed Financial Statements, Captions [Line Items]
Total interest income	$73,800	$73,652	$67,386	$64,523	$64,076	$62,984	$62,413	$63,304	$279,361	$252,777	$262,259
Non-interest expense	42,297	45,833	43,671	38,190	37,540	36,464	37,813	36,946	169,991	148,763	148,828
Income before income tax expense	31,187	26,945	22,557	24,727	25,208	28,063	27,235	25,394	105,416	105,900	96,122
Income tax expense	9,968	7,913	6,206	7,698	7,806	11,987	8,007	7,566	31,785	35,366	28,855
Net income	21,219	19,032	16,351	17,029	17,402	16,076	19,228	17,828	73,631	70,534	67,267
Provident Financial Services, Inc. [Member]
Condensed Financial Statements, Captions [Line Items]
Dividends from subsidiary									36,118	32,320	40,729
Interest income									2,276	2,390	2,696
Investment gain									11	9	9
Total interest income									38,405	34,719	43,434
Non-interest expense									814	891	882
Total expense									814	891	882
Income before income tax expense									37,591	33,828	42,552
Income tax expense									551	563	688
Income before undistributed net income of subsidiary									37,040	33,265	41,864
Equity in undistributed net income of subsidiary (dividends in excess of earnings)									36,591	37,269	25,403
Net income									$73,631	$70,534	$67,267

Parentonly_Financial_Informati4

Parent-only Financial Information - Statements of Cash Flows (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities:
Net income	$73,631	$70,534	$67,267
Adjustments to reconcile net income to net cash provided by operating activities
ESOP expense	2,654	2,559	2,030
SAP allocation	6,359	4,869	3,658
Stock option allocation	298	297	452
Increase (decrease) in other assets	-22,379	-16,325	-9,228
(Decrease) increase in other liabilities	7,721	173	2,482
Net cash provided by operating activities	96,400	99,394	108,291
Cash flows from investing activities:
Net decrease in ESOP loan	-129,240	-259,359	-191,904
Net cash used in investing activities	-69,279	-238,817	-185,106
Cash flows from financing activities:
Purchases of treasury stock	-4,420	-5,899	-9,424
Cash dividends paid	-36,118	-32,320	-40,729
Shares issued dividend reinvestment plan	1,336	1,244	6,090
Stock options exercised	117	354	28
Net cash (used in) provided by financing activities	-24,583	136,824	111,006
Net (decrease) increase in cash and cash equivalents	2,538	-2,599	34,191
Cash and cash equivalents at beginning of period	101,224	103,823	69,632
Cash and cash equivalents at end of period	103,762	101,224	103,823
Provident Financial Services, Inc. [Member]
Cash flows from operating activities:
Net income	73,631	70,534	67,267
Adjustments to reconcile net income to net cash provided by operating activities
Dividends in excess of earnings (equity in undistributed net income) of subsidiary	-36,591	-37,269	-25,403
ESOP expense	2,654	2,559	2,030
SAP allocation	6,359	4,869	3,658
Stock option allocation	298	297	452
Decrease in due from subsidiary—SAP	3,475	5,814	4,177
Increase (decrease) in other assets	15,454	-6,912	-13,960
(Decrease) increase in other liabilities	-259	-172	68
Net cash provided by operating activities	65,021	39,720	38,289
Cash flows from investing activities:
Cash consideration paid for business acquisition	-31,562	0	0
Net decrease in ESOP loan	3,278	3,034	3,035
Net cash used in investing activities	-28,284	3,034	3,035
Cash flows from financing activities:
Purchases of treasury stock	-4,420	-5,899	-9,424
Cash dividends paid	-36,118	-32,320	-40,729
Shares issued dividend reinvestment plan	1,336	1,186	6,090
Stock options exercised	144	412	28
Net cash (used in) provided by financing activities	-39,058	-36,621	-44,035
Net (decrease) increase in cash and cash equivalents	-2,321	6,133	-2,711
Cash and cash equivalents at beginning of period	12,796	6,663	9,374
Cash and cash equivalents at end of period	$10,475	$12,796	$6,663

Other_Comprehensive_Income_Los2

Other Comprehensive Income (Loss) - Schedule of Components (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Unrealized gains and losses on securities available for sale:
Net gains (losses) arising during the period	$17,868	($32,845)	$3,060
Reclassification adjustment for gains included in net income	-251	-996	-4,497
Total	17,617	-33,841	-1,437
Other-than-temporary impairment on debt securities available for sale:
Other-than-temporary impairment losses on securities	0	0	0
Reclassification adjustment for impairment losses included in net income	0	434	0
Total	0	434	0
Pension and other postretirement benefit plans:
Amortization related to post retirement obligations	-9,462	12,161	-1,699
Total other comprehensive income (loss)	8,155	-21,246	-3,136
Unrealized gains and losses on securities available for sale:
Net gains (losses) arising during the period	-7,176	13,417	-1,250
Reclassification adjustment for gains included in net income	101	407	1,837
Total	-7,075	13,824	587
Other-than-temporary impairment on debt securities available for sale:
Other-than-temporary impairment losses on securities	0	0	0
Reclassification adjustment for impairment losses included in net income	0	-177	0
Total	0	-177	0
Pension and other postretirement benefit plans:
Amortization related to post retirement obligations	3,800	-4,968	694
Total other comprehensive (loss) income, Tax Effect	-3,275	8,679	1,281
Unrealized gains and losses on securities available for sale:
Net gains (losses) arising during the period	10,692	-19,428	1,810
Reclassification adjustment for gains included in net income	-150	-589	-2,660
Total	10,542	-20,017	-850
Other-than-temporary impairment on debt securities available for sale:
Other-than-temporary impairment losses on securities	0	0	0
Reclassification adjustment for impairment losses included in net income	0	257	0
Total	0	257	0
Pension and other postretirement benefit plans:
Amortization related to post retirement obligations	-5,662	7,193	-1,005
Total other comprehensive income (loss)	$4,880	($12,567)	($1,855)

Other_Comprehensive_Income_Los3

Other Comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Income (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss), Net Of Tax [Roll Forward]
Beginning balance	($4,851)	$7,716
Current period other comprehensive (loss) income	4,880	-12,567	-1,855
Ending balance	29	-4,851	7,716
Unrealized Gains on Securities Available for Sale [Member]
Accumulated Other Comprehensive Income (Loss), Net Of Tax [Roll Forward]
Beginning balance	-2,799	16,961
Current period other comprehensive (loss) income	10,542	-19,760
Ending balance	7,743	-2,799
Post-Retirement Obligations [Member]
Accumulated Other Comprehensive Income (Loss), Net Of Tax [Roll Forward]
Beginning balance	-2,052	-9,245
Current period other comprehensive (loss) income	-5,662	7,193
Ending balance	($7,714)	($2,052)

Other_Comprehensive_Income_Los4

Other Comprehensive Income (Loss) - Reclassifications Out of Accumulated Other Comprehensive Income (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Realized loss related to lump sum pension settlement									($1,300)
Income tax expense (benefit)	-9,968	-7,913	-6,206	-7,698	-7,806	-11,987	-8,007	-7,566	-31,785	-35,366	-28,855
Net income	21,219	19,032	16,351	17,029	17,402	16,076	19,228	17,828	73,631	70,534	67,267
Amount Reclassified from AOCI [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Net income									-498	1,141
Amount Reclassified from AOCI [Member] | Securities available for sale: Realized net gains [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Realized net gains on the sale of securities available for sale									251	996
Income tax expense (benefit)									-101	-407
Net income									150	589
Amount Reclassified from AOCI [Member] | Securities available for sale: Realized other-than-temporary impairment [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Realized other-than-temporary impairment losses on securities available for sale									0	-434
Income tax expense (benefit)									0	177
Net income									0	-257
Amount Reclassified from AOCI [Member] | Post-retirement obligations [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Amortization of actuarial losses (gains)									237	1,367
Income tax expense (benefit)									-95	-558
Net income									142	809
Amount Reclassified from AOCI [Member] | Realized loss related to lump sum pension settlement [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Realized loss related to lump sum pension settlement									-1,336	0
Income tax expense (benefit)									546	0
Net income									($790)	$0

Derivative_and_Hedging_Activit2

Derivative and Hedging Activities - Fair Value of Derivatives (Details) (Derivatives Not Designated as Hedging Instrument [Member], USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Derivatives, Fair Value [Line Items]
Asset Derivatives	$2,046
Liability Derivatives	2,052
Other Assets [Member] | Interest Rate Products [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives	2,040
Other Assets [Member] | Credit Risk Contract [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives	6
Other Liabilities [Member] | Interest Rate Products [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives	$2,052

Derivative_and_Hedging_Activit3

Derivative and Hedging Activities - Gains and Losses on Derivatives (Details) (Derivatives Not Designated as Hedging Instrument [Member], USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in Income on derivatives	$3
Interest Rate Products [Member] | Other Income
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in Income on derivatives	-3
Credit Risk Contract [Member] | Other Income
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in Income on derivatives	$6

Derivative_and_Hedging_Activit4

Derivative and Hedging Activities - Additional Information (Details) (Derivatives Not Designated as Hedging Instrument [Member], USD $)	Dec. 31, 2014
Derivative [Line Items]
Liability derivative	$2,084,000
Collateral against obligations	1,250,000
Interest Rate Products [Member]
Derivative [Line Items]
Number of derivative instruments held	9
Derivative, notional amount	$94,900,000