ESB Financial (ESBF) 10-Q 12 Nov 13 2013 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2013	Oct. 31, 2013
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Sep-13	'
Document Fiscal Year Focus	'2013	'
Document Fiscal Period Focus	'Q3	'
Entity Registrant Name	'ESB FINANCIAL CORP	'
Entity Central Index Key	'0000872835	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	17,679,838

Consolidated_Statements_of_Fin

Consolidated Statements of Financial Condition (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Assets	'	'
Cash on hand and in banks	$5,190	$5,664
Interest-earning deposits	14,649	9,400
Cash and cash equivalents	19,839	15,064
Securities available for sale; cost of $1,049,130 and $1,065,447	1,067,401	1,110,776
Loans receivable, net of allowance for loan losses of $6,713 and $6,709	683,704	672,086
Accrued interest receivable	7,582	8,068
Federal Home Loan Bank (FHLB) stock	13,655	15,077
Premises and equipment, net	13,502	14,286
Real estate acquired through foreclosure, net	1,977	2,441
Real estate held for investment	7,014	9,968
Goodwill	41,599	41,599
Intangible assets	166	302
Bank owned life insurance	30,460	30,025
Securities receivable	1,319	1,277
Prepaid expenses and other assets	11,165	6,645
Total assets	1,899,383	1,927,614
Liabilities:	'	'
Deposits	1,232,434	1,178,057
FHLB advances	251,803	213,232
Repurchase agreements	158,000	268,000
Other borrowings	12,467	3,324
Junior subordinated notes	36,083	46,393
Advance payments by borrowers for taxes and insurance	1,503	2,619
Accounts payable for land development	1,669	2,033
Accrued expenses and other liabilities	19,100	19,156
Total liabilities	1,713,059	1,732,814
Stockholders' Equity:	'	'
Preferred stock, $.01 par value, 5,000,000 shares authorized; none issued	'	'
Common stock, $.01 par value, 30,000,000 shares authorized; 19,214,226 and 19,211,028 shares issued; 17,669,375 and 17,599,928 shares outstanding	192	163
Additional paid-in capital	103,456	103,346
Treasury stock, at cost; 1,544,851 and 1,611,100 shares	-18,204	-18,847
Unearned Employee Stock Ownership Plan (ESOP) shares	-2,370	-3,132
Retained Earnings	95,639	89,065
Accumulated other comprehensive income, net	8,692	25,103
Total ESB Financial Corporation's stockholders' equity	187,405	195,698
Noncontrolling interest	-1,081	-898
Total stockholders' equity	186,324	194,800
Total liabilities and stockholders' equity	$1,899,383	$1,927,614

Consolidated_Statements_of_Fin1

Consolidated Statements of Financial Condition (Parenthetical) (USD $)	Sep. 30, 2013		Dec. 31, 2012
In Thousands, except Share data, unless otherwise specified
Statement Of Financial Position [Abstract]	'		'
Securities available for sale; cost	$1,049,130		$1,065,447
Loans receivable, allowance for loan losses	$6,713		$6,709
Preferred stock, par value	$0.01		$0.01
Preferred stock, shares authorized	5,000,000		5,000,000
Preferred stock, shares issued	0		0
Common stock, par value	$0.01		$0.01
Common stock, shares authorized	30,000,000		30,000,000
Common stock, shares issued	19,214,226	[1]	19,211,028	[1]
Common stock, shares outstanding	17,669,375	[1]	17,599,928	[1]
Treasury stock, shares	1,544,851		1,611,100
[1]	Shares issued and outstanding have been adjusted to reflect the six-for-five stock split declared April 16, 2013.

Consolidated_Statements_of_Ope

Consolidated Statements of Operations (USD $)	3 Months Ended				9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Interest and dividend income:	'		'		'		'
Loans receivable	$7,965		$8,334		$24,010		$25,017
Taxable securities available for sale	6,417		7,946		19,484		25,346
Tax free securities available for sale	1,626		1,654		4,930		4,966
FHLB Stock	68		4		86		20
Deposits with banks and federal funds sold	2		5		2		54
Total interest income	16,078		17,943		48,512		55,403
Interest expense:	'		'		'		'
Deposits	1,800		2,225		5,643		7,213
Borrowed funds	2,917		4,325		9,664		13,568
Junior subordinated notes and guaranteed preferred beneficial interest in subordinated debt	529		618		1,608		1,841
Total interest expense	5,246		7,168		16,915		22,622
Net interest income	10,832		10,775		31,597		32,781
Provision for loan losses	75		350		300		850
Net interest income after provision for loan losses	10,757		10,425		31,297		31,931
Noninterest income:	'		'		'		'
Fees and service charges	997		860		2,535		2,522
Increase of cash surrender value of bank owned life insurance	135		142		435		448
Net realized gain on securities available for sale	58		197		525		464
Total other-than-temporary impairment losses	'		'		0		-406
Portion of loss recognized in other comprehensive income before taxes	'		'		'		375
Net impairment losses on investment securities	'		'		'		-31
Net realized (loss) gain on derivatives	-166		-138		51		-538
Income from real estate held for investment	335		413		1,296		1,532
Other	258		163		585		502
Total noninterest income	1,617		1,637		5,427		4,899
Noninterest expense:	'		'		'		'
Compensation and employee benefits	4,463		4,306		13,344		12,989
Premises and equipment	676		640		2,066		2,074
Federal deposit insurance premiums	304		337		930		1,095
Data processing	593		608		1,769		1,791
Amortization of intangible assets	41		61		130		190
Advertising	145		174		468		457
Other	1,278		1,122		3,460		3,866
Total noninterest expense	7,500		7,248		22,167		22,462
Income before income taxes	4,874		4,814		14,557		14,368
Provision for income taxes	763		793		2,530		2,437
Net income before noncontrolling interest	4,111		4,021		12,027		11,931
Less: net income attributable to the noncontrolling interest	140		87		466		531
Net income attributable to ESB Financial Corporation	$3,971		$3,934		$11,561		$11,400
Net income per share	'		'		'		'
Basic	$0.23	[1]	$0.23	[1]	$0.67	[1]	$0.66	[1]
Diluted	$0.23	[1]	$0.22	[1]	$0.66	[1]	$0.66	[1]
Cash dividends declared per share	$0.10	[1]	$0.08	[1]	$0.28	[1]	$0.25	[1]
Weighted average shares outstanding	17,409,820	[1]	17,234,850	[1]	17,358,818	[1]	17,194,979	[1]
Weighted average shares and share equivalents outstanding	17,602,691	[1]	17,388,541	[1]	17,530,471	[1]	17,350,103	[1]
[1]	Outstanding shares and per share data have been adjusted to reflect the six-for-five stock split declared April 16, 2013.

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement Of Income And Comprehensive Income [Abstract]	'	'	'	'
Net Income before noncontrolling interest	$4,111	$4,021	$12,027	$11,931
Securities available for sale other-than-temporarily impaired:	'	'	'	'
Total losses	'	'	'	-406
Losses recognized in earnings	'	'	2,000	31
Losses recognized in comprehensive income	'	'	'	-375
Income tax effect	'	'	'	127
Unrealized holding losses on other-than-temporarily impaired securities available for sale, net of tax	'	'	'	-248
Securities available for sale not other-than-temporarily impaired:	'	'	'	'
(Losses) gains arising during the period	-1,363	9,956	-25,845	14,386
Income tax effect	463	-3,385	8,788	-4,891
Gains arising during the year, net of tax	-900	6,571	-17,057	9,495
Gains recognized in earnings	-58	-197	-525	-464
Income tax effect	20	67	178	158
Gains recognized in earnings, net of tax	-38	-130	-347	-306
Unrealized holding (losses) gains on securities available for sale not other-than-temporarily-impaired, net of tax	-938	6,441	-17,404	9,189
Unrealized holding (loss) gain on securities, net	-938	6,441	-17,404	8,941
Pension and Postretirement Amortization	36	51	108	157
Income tax effect	-12	-18	-37	-53
Pension and Postretirement Amortization, net of tax	24	33	71	104
Fair Value adjustment on derivatives	29	-222	1,398	-628
Income tax effect	-10	76	-476	214
Fair Value adjustment on derivatives	19	-146	922	-414
Net current period OCI, Total	-895	6,328	-16,411	8,631
Net comprehensive income (loss) before noncontrolling interest	3,216	10,349	-4,384	20,562
Less: net income attributable to the noncontrolling interest	140	87	466	531
Net comprehensive income (loss) attributable to ESB Financial Corporation	$3,076	$10,262	($4,850)	$20,031

Consolidated_Statement_of_Chan

Consolidated Statement of Changes in Stockholders' Equity (USD $)		Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Unearned ESOP Shares [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income, Net of Tax [Member]	Noncontrolling Interest [Member]
In Thousands
Beginning balance at Dec. 31, 2012		$194,800	$163	$103,346	($18,847)	($3,132)	$89,065	$25,103	($898)
Net income		12,027	'	'	'	'	11,561	'	466
Other comprehensive results, net		-16,411	'	'	'	'	'	-16,411	'
Cash dividends at $0.28 per share	[1]	-4,915	'	'	'	'	-4,915	'	'
Six for five stock split, payment in lieu of fractional shares		-5	29	-34	'	'	'	'	'
Purchase of treasury stock, at cost (44,828 shares)		-615	'	'	-615	'	'	'	'
Reissuance of treasury stock for stock option exercises (111,077 shares)		1,186	'	'	1,258	'	-72	'	'
Compensation expense ESOP and MRP		1,166	'	404	'	762	'	'	'
Additional ESOP shares purchased		-300	'	-300	'	'	'	'	'
Tax effect of compensatory stock options		40	'	40	'	'	'	'	'
Capital disbursement for noncontrolling interest		-649	'	'	'	'	'	'	-649
Ending balance at Sep. 30, 2013		$186,324	$192	$103,456	($18,204)	($2,370)	$95,639	$8,692	($1,081)
[1]	Outstanding shares and per share data have been adjusted to reflect the six-for-five stock split declared April 16, 2013.

Consolidated_Statement_of_Chan1

Consolidated Statement of Changes in Stockholders' Equity (Parenthetical) (USD $)	9 Months Ended
	Sep. 30, 2013
Cash dividends per share	$0.28	[1]
Purchase of treasury stock, shares	44,828
Reissuance of treasury stock for stock option exercises, shares	111,077
Treasury Stock [Member]	'
Purchase of treasury stock, shares	44,828
Reissuance of treasury stock for stock option exercises, shares	111,077
Retained Earnings [Member]	'
Cash dividends per share	$0.28	[1]
Reissuance of treasury stock for stock option exercises, shares	111,077
[1]	Outstanding shares and per share data have been adjusted to reflect the six-for-five stock split declared April 16, 2013.

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Operating activities:	'	'
Net income	$12,027	$11,931
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Depreciation and amortization for premises and equipment	729	767
Provision for loan losses	300	850
Amortization of premiums and accretion of discounts	2,951	2,549
Net gain on sale of securities available for sale	-525	-464
Impairment losses on investment securities	'	31
Net realized (gain) loss on derivatives	-51	538
Amortization of intangible assets	130	190
Compensation expense on ESOP and MRP	1,166	1,087
Increases in Bank owned life insurance	-435	-448
Decrease in accrued interest receivable	486	946
Decrease in prepaid FDIC assessment	2,031	1,007
Decrease (increase) in prepaid expenses and other assets	2,628	-1,761
Increase in accrued expenses and other liabilities	1,429	5,005
Gain on sale of real estate acquired through foreclosure	-58	-44
Other	-2,784	-706
Net cash provided by operating activities	20,024	21,478
Investing activities:	'	'
Loan originations	-149,279	-163,958
Purchases of:	'	'
Securities available for sale	-165,442	-196,027
FHLB Stock	-4,937	'
Premises and equipment	-50	-418
Principal repayments of:	'	'
Loans receivable	141,572	143,494
Securities available for sale	177,813	199,861
Proceeds from the sale of:	'	'
Securities available for sale	1,956	1,084
Real estate acquired through foreclosure	586	1,927
Premises and Equipment	105	'
Proceeds from bank owned life insurance	'	1,386
Redemption of FHLB stock	6,359	3,908
Funding of real estate held for investment	-5,714	-7,495
Proceeds from real estate held for investment	3,571	4,553
Net cash provided by (used in) investing activities	6,540	-11,685
Financing activities:	'	'
Net increase in deposits	54,377	36,973
Proceeds from long-term borrowings	105,291	7,512
Repayments of long-term borrowings	-162,073	-79,043
Net (decrease) increase in short-term borrowings	-5,504	9,295
Capital disbursement to noncontrolling interest	-649	-520
Redemption of junior subordinated notes	-10,310	'
Proceeds received from exercise of stock options	1,226	681
Dividends paid	-3,232	-4,388
Payments to acquire treasury stock	-615	-175
Stock purchased by ESOP	-300	-250
Net cash used in financing activities	-21,789	-29,915
Net increase (decrease) in cash equivalents	4,775	-20,122
Cash equivalents at beginning of period	15,064	38,848
Cash equivalents at end of period	19,839	18,726
Supplemental information:	'	'
Interest paid	15,605	20,402
Income taxes paid	2,050	2,960
Supplemental schedule of non-cash investing and financing activities:	'	'
Transfers from loans receivable to real estate acquired through foreclosure	86	1,192
Transfers from loan originations to proceeds on real estate held for investment	4,733	5,162
Dividends declared but not paid	$1,767	$1,467

Summary_of_Significant_Account

Summary of Significant Accounting Policies

9 Months Ended

Sep. 30, 2013

Accounting Policies [Abstract]

'

Summary of Significant Accounting Policies

'

1

Summary of Significant Accounting Policies

Principles of Consolidation

ESB Financial Corporation (the Company) is a publicly traded Pennsylvania thrift holding company. The consolidated financial statements include the accounts of the Company and its direct and indirect wholly-owned subsidiaries, which are ESB Bank (ESB or the Bank), THF, Inc. (THF), ESB Financial Services, Inc. (EFS) and AMSCO, Inc. (AMSCO). ESB is a Pennsylvania chartered, Federal Deposit Insurance Corporation (FDIC) insured stock savings bank.

AMSCO is engaged in real estate development and construction of 1-4 family residential units independently or in conjunction with its joint ventures. AMSCO is currently involved in eight real estate joint ventures, all of which are owned 51% or greater by AMSCO. The Bank has provided all development and construction financing. These joint ventures have been included in the consolidated financial statements and reflected within the consolidated statements of financial condition as real estate held for investment and related operating income and expenses are reflected within other non-interest income or expense. The Bank’s loans to AMSCO and related interest have been eliminated in consolidation.

In addition to the elimination of the loans and interest to the joint ventures described above, all other significant intercompany transactions and balances have been eliminated in consolidation.

Basis of Presentation

The accompanying unaudited consolidated financial statements for the interim periods include all adjustments, consisting only of normal recurring accruals, which are necessary, in the opinion of management, to fairly reflect the Company’s financial position and results of operations. Additionally, these consolidated financial statements for the interim periods have been prepared in accordance with instructions for the Securities and Exchange Commission’s Form 10-Q and therefore do not include all information or footnotes necessary for a complete presentation of financial condition, results of operations and cash flows in conformity with U.S. generally accepted accounting principles (GAAP). For further information, refer to the audited consolidated financial statements and footnotes thereto for the year ended December 31, 2012, as contained in the Company’s 2012 Annual Report to Stockholders.

The results of operations for the three and nine month periods ended September 30, 2013 are not necessarily indicative of the results that may be expected for the entire year. Certain amounts previously reported have been reclassified to conform to the current periods’ reporting format, such reclassifications did not have an effect on stockholders’ equity or net income.

The accounting principles followed by the Company and the methods of applying these principles conform with GAAP and with general practice within the banking industry. In preparing the consolidated financial statements management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the Statement of Financial Condition date and revenues and expenses for the period. Actual results could differ significantly from those estimates.

Operating Segments

An operating segment is defined as a component of an enterprise that engages in business activities that generate revenue and incur expense, the operating results of which are reviewed by management. At September 30, 2013, the Company was doing business through 23 full service banking branches, one loan production office and through its various other subsidiaries. Loans and deposits are primarily generated from the areas where banking branches are located. The Company derives its income predominantly from interest on loans and securities and to a lesser extent, non-interest income. The Company’s principal expenses are interest paid on deposits and borrowed funds and normal operating costs. The Company’s operations are principally in the banking industry. Consistent with internal reporting, the Company’s operations are reported in one operating segment, which is community banking.

Stock Based Compensation

During the three and nine months ended September 30, 2013, the Company recorded approximately $186,000 and $537,000, respectively, in compensation expense and a tax benefit of $12,000 and $49,000, respectively, related to our share-based compensation awards that are expected to vest in 2013. As of September 30, 2013, there was approximately $727,000 of unrecognized compensation cost related to unvested share-based compensation awards granted. That cost is expected to be recognized over the next four years.

During the three and nine months ended September 30, 2012, the Company recorded approximately $116,000 and $327,000, respectively, in compensation expense and a tax benefit of $6,000 and $23,000, respectively, related to our share-based compensation awards that vested in 2012.

Cash flows from the tax benefits resulting from tax deductions in excess of the compensation cost recognized for stock-based awards (excess tax benefits) are classified as financing cash flows.

Financial Instruments

As part of its overall interest rate risk management activities, the Company utilizes derivative instruments to manage its exposure to various types of interest rate risk. Interest rate swaps and interest rate caps are the primary instruments the Company uses for interest rate risk management. Derivative instruments are recorded at fair value as either part of prepaid expenses and other assets or accrued expenses and other liabilities on the consolidated statements of financial condition. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative and the resulting designation. Derivatives used to hedge the exposure to changes in the fair value of an asset, liability, or firm commitment attributable to a particular risk, such as interest rate risk, are considered fair value hedges. Derivatives used to hedge the exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges.

The Company formally documents the relationship between the hedging instruments and hedged items, as well as the risk management objective and strategy, before undertaking an accounting hedge. To qualify for hedge accounting, the derivatives and related hedged items must be designated as a hedge at inception of the hedge relationship. For accounting hedge relationships, we formally assess, both at the inception of the hedge and on an ongoing basis, if the derivatives are highly effective in offsetting designated changes in the fair value or cash flows of the hedged item. If it is determined that the derivative instrument is not highly effective, hedge accounting is discontinued.

For derivatives designated as fair value hedges, changes in the fair value of the derivative and the hedged item related to the hedged risk are recognized in earnings. To the extent the change in fair value of the derivative does not offset the change in fair value of the hedged item, the difference or ineffectiveness is reflected in earnings in the same financial statement category as the hedged item.

For derivatives designated as cash flow hedges, the effective portion of changes in the fair value of the derivative is initially reported in other comprehensive income (OCI) and subsequently reclassified to earnings when the hedged transaction affects earnings and the ineffective portion of changes in the fair value of the derivative is recognized directly in earnings. The Company assesses the effectiveness of each hedging relationship by comparing the changes in fair value or cash flows of the derivative hedging instrument with the changes in fair value or cash flows of the designated hedged item or transaction. For derivatives not designated as hedges, changes in fair value are recognized in earnings.

At September 30, 2013, there were twenty one interest rate cap contracts outstanding with notional amounts totaling $220.0 million. These derivative instruments are not hedged and therefore adjustments to fair value are recorded in current earnings.

The Company entered into two interest rate swap contracts to manage its exposure to interest rate risk. These interest rate swap transactions involved the exchange of the Company’s interest payment on $35.0 million in junior subordinated notes which became floating rate notes in 2011 for a fixed rate interest payment without the exchange of the underlying principal amount. Entering into interest rate derivatives potentially exposes the Company to the risk of counterparties’ failure to fulfill their legal obligations including, but not limited to, potential amounts due or payable under each derivative contract. Notional principal amounts are often used to express the volume of these transactions, but the amounts potentially subject to credit risk are much smaller. Management utilizes the Change in Variable Cash Flows Method to measure hedge ineffectiveness. To the extent that the cumulative change in anticipated cash flows from the hedging derivative offsets from 80% to 125% of the cumulative change in anticipated cash flows from the hedged exposure, the hedged is deemed effective. As of September 30, 2013, the interest rate swaps were deemed to be effective, therefore no amounts were charged to current earnings. The Company also does not expect to reclassify any hedge related amounts from OCI to earnings over the next twelve months.

The fixed rate interest rate swap contract outstanding at September 30, 2013 is being utilized to hedge $35.0 million in floating rate junior subordinated notes. Below is a summary of the interest rate swap contract and the terms at September 30, 2013:

Notional

Effective

Pay

Receive

Maturity

Unrealized

(Dollars in thousands)

Amount

Date

Rate

Rate (*)

Date

Gain

Loss

Cash Flow Hedge

$

20,000

2/10/11

4.18

%

0.28

%

2/10/18

$

—

$

862

Cash Flow Hedge

15,000

2/10/11

3.91

%

0.28

%

2/10/18

—

586

$

35,000

$

—

$

1,448

*

Variable receive rate based upon contract rates in effect at September 30, 2013.

Recent Accounting and Regulatory Pronouncements

In February 2013, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2013-02, Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income. The standard requires that companies present either in a single note or parenthetically on the face of the financial statements, the effect of significant amounts reclassified from each component of accumulated other comprehensive income based on its source and the income statement line items affected by the reclassification. The new requirements will take effect for public companies in fiscal years, and interim periods within those years, beginning after December 15, 2012. The Company adopted this standard on January 1, 2013. The effect of adopting this standard increased our disclosure surrounding reclassification items out of accumulated other comprehensive income.

In February 2013, the FASB issued ASU 2013-04, Obligations Resulting from Joint and Several Liability Arrangements for Which the Total Amount of the Obligation is Fixed at the Reporting Date. The ASU requires the measurement of obligations resulting from joint and several liability arrangements for which the total amount of the obligation is fixed at the reporting date as the sum of the amount the reporting entity agreed to pay on the basis of its arrangement with its co-obligors as well as any additional amount that the entity expects to pay on behalf of its co-obligors. The new standard is effective retrospectively for fiscal years and interim periods within those years, beginning after December 15, 2013, and early adoption is permitted. This ASU is not expected to have a significant impact on the Company’s financial statements.

In April 2013, the FASB ASU 2013-07, Presentation of Financial Statements (Topic 205): Liquidation Basis of Accounting. The amendments in this Update are being issued to clarify when an entity should apply the liquidation basis of accounting. In addition, the guidance provides principles for the recognition and measurement of assets and liabilities and requirements for financial statements prepared using the liquidation basis of accounting. The amendments require an entity to prepare its financial statements using the liquidation basis of accounting when liquidation is imminent. Liquidation is imminent when the likelihood is remote that the entity will return from liquidation and either (a) a plan for liquidation is approved by the person or persons with the authority to make such a plan effective and the likelihood is remote that the execution of the plan will be blocked by other parties or (b) a plan for liquidation is being imposed by other forces (for example, involuntary bankruptcy). If a plan for liquidation was specified in the entity’s governing documents from the entity’s inception (for example, limited-life entities), the entity should apply the liquidation basis of accounting only if the approved plan for liquidation differs from the plan for liquidation that was specified at the entity’s inception. The amendments are effective for entities that determine liquidation is imminent during annual reporting periods beginning after December 15, 2013, and interim reporting periods therein. Entities should apply the requirements prospectively from the day that liquidation becomes imminent. Early adoption is permitted. Entities that use the liquidation basis of accounting as of the effective date in accordance with other Topics (for example, terminating employee benefit plans) are not required to apply the amendments. Instead, those entities should continue to apply the guidance in those other Topics until they have completed liquidation. This ASU is not expected to have a significant impact on the Company’s financial statements.

In June 2013, the FASB issued ASU 2013-08, Financial Services – Investment Companies (Topic 946): Amendments to the Scope, Measurement, and Disclosure Requirements. The amendments in this Update affect the scope, measurement, and disclosure requirements for investment companies under U.S. GAAP. The amendments do all of the following: 1. Change the approach to the investment company assessment in Topic 946, clarify the characteristics of an investment company, and provide comprehensive guidance for assessing whether an entity is an investment Company. 2. Require an investment company to measure noncontrolling ownership interests in other investment companies at fair value rather than using the equity method of accounting. 3. Require the following additional disclosures: (a) the fact that the entity is an investment company and is applying the guidance in Topic 946, (b) information about changes, if any, in an entity’s status as an investment company, and (c) information about financial support provided or contractually required to be provided by an investment company to any of its investees. The amendments in this Update are effective for an entity’s interim and annual reporting periods in fiscal years that begin after December 15, 2013. Earlier application is prohibited. This ASU is not expected to have a significant impact on the Company’s financial statements.

In July 2013, the FASB ASU 2013-09, Fair Value Measurement (Topic 820): Deferral of the Effective Date of Certain Disclosures for Nonpublic Employee Benefit Plans in Update No. 2011-04. The amendments in this Update apply to certain quantitative disclosure requirements for an employee benefit plan, other than those plans that are subject to the Securities and Exchange Commission’s filing requirements (hereafter “nonpublic employee benefit plan”), that holds investments in its plan sponsor’s own nonpublic entity equity securities, including equity securities of its plan sponsor’s nonpublic affiliated entities and that are within the scope of the disclosure requirements contained in FASB Accounting Standards Update No. 2011-04, Fair Value Measurement (Topic 820): Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRSs. The amendments in this Update defer indefinitely the effective date of certain required disclosures in Update 2011-04 (Topic 820) of quantitative information about the significant unobservable inputs used in Level 3 fair value measurements for investments held by a nonpublic employee benefit plan in its plan sponsor’s own nonpublic entity equity securities, including equity securities of its plan sponsor’s nonpublic affiliated entities. The amendments in this Update do not defer the effective date for those certain quantitative disclosures for other nonpublic entity equity securities held in the nonpublic employee benefit plan or any qualitative disclosures. The deferral in this amendment is effective upon issuance for financial statements that have not been issued. This ASU did not have a significant impact on the Company’s financial statements.

In July 2013, the FASB issued ASU 2013-10, Derivatives and Hedging (Topic 815): Inclusion of the Fed Funds Effective Swap Rate (or Overnight Index Swap Rate) as a Benchmark Interest Rate for Hedge Accounting Purposes. The amendments in this Update permit the Fed Funds Effective Swap Rate (OIS) to be used as a U.S. benchmark interest rate for hedge accounting purposes under Topic 815, in addition to UST and LIBOR. The amendments also remove the restriction on using different benchmark rates for similar hedges. The amendments are effective prospectively for qualifying new or redesignated hedging relationships entered into on or after July 17, 2013. This ASU did not have a significant impact on the Company’s financial statements.

In July 2013, the FASB issued ASU 2013-11, Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists. This Update applies to all entities that have unrecognized tax benefits when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists at the reporting date. An unrecognized tax benefit, or a portion of an unrecognized tax benefit, should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward, except as follows. To the extent a net operating loss carryforward, a similar tax loss, or a tax credit carryforward is not available at the reporting date under the tax law of the applicable jurisdiction to settle any additional income taxes that would result from the disallowance of a tax position or the tax law of the applicable jurisdiction does not require the entity to use, and the entity does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and should not be combined with deferred tax assets. The assessment of whether a deferred tax asset is available is based on the unrecognized tax benefit and deferred tax asset that exist at the reporting date and should be made presuming disallowance of the tax position at the reporting date. The amendments in this Update are effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. For nonpublic entities, the amendments are effective for fiscal years, and interim periods within those years, beginning after December 15, 2014. Early adoption is permitted. The amendments should be applied prospectively to all unrecognized tax benefits that exist at the effective date. Retrospective application is permitted. This ASU is not expected to have a significant impact on the Company’s financial statements.

Securities_Available_for_Sale

Securities Available for Sale	9 Months Ended
	Sep. 30, 2013
Investments Debt And Equity Securities [Abstract]	'
Securities Available for Sale	'
	2	Securities Available for Sale
	The Company’s securities available for sale portfolio is summarized as follows:
	(Dollar amounts in thousands)
			Amortized			Unrealized		Unrealized			Fair value
			cost			gains		losses
	September 30, 2013:
	Trust preferred securities		$	45,898		$	245	$	(7,655	)	$	38,488
	Municipal securities			176,076			6,649		(3,288	)		179,437
	Equity securities- financial institutions			953			776		—			1,729
	Corporate bonds			209,153			6,044		(477	)		214,720
	Mortgage-backed securities
	U.S. sponsored entities			615,116			20,921		(4,966	)		631,071
	Private label			1,934			24		(2	)		1,956
	Subtotal mortgage-backed securities			617,050			20,945		(4,968	)		633,027
	Total securities		$	1,049,130		$	34,659	$	(16,388	)	$	1,067,401
	December 31, 2012:
	Trust preferred securities		$	45,894		$	367	$	(8,234	)	$	38,027
	Municipal securities			177,414			13,717		(244	)		190,887
	Equity securities- financial institutions			1,142			676		—			1,818
	Corporate bonds			219,700			7,186		(1,091	)		225,795
	Mortgage-backed securities
	U.S. sponsored entities			617,158			33,021		(246	)		649,933
	Private label			4,139			177		—			4,316
	Subtotal mortgage-backed securities			621,297			33,198		(246	)		654,249
	Total securities		$	1,065,447		$	55,144	$	(9,815	)	$	1,110,776
	The following table shows the Company’s investments gross unrealized losses and fair value aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at September 30, 2013:
	As of September 30, 2013
	(Dollar amounts in thousands)
			Less than 12 Months								12 Months or more						Total
			# of			Fair Value		Unrealized			# of		Fair Value		Unrealized		# of		Fair Value		Unrealized
			Securities					losses			Securities				losses		Securities				losses
	Trust preferred securities			—		$	—	$	—			9	$	36,768	$	7,655		9	$	36,768	$	7,655
	Municipal securities			33			27,172		2,894			2		2,853		394		35		30,025		3,288
	Corporate bonds			5			13,894		160			4		15,432		317		9		29,326		477
	Mortgage-backed securities
	U.S. sponsored entities			52			176,057		4,966			—		—		—		52		176,057		4,966
	Private label			1			542		2			—		—		—		1		542		2
	Subtotal mortgage-backed securities			53			176,599		4,968			—		—		—		53		176,599		4,968
	Total			91		$	217,665	$	8,022			15	$	55,053	$	8,366		106	$	272,718	$	16,388
	The following table shows the Company’s investments gross unrealized losses and fair value aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at December 31, 2012:
	As of December 31, 2012
	(Dollar amounts in thousands)
			Less than 12 Months								12 Months or more						Total
			# of			Fair Value		Unrealized			# of		Fair Value		Unrealized		# of		Fair Value		Unrealized
			Securities					losses			Securities				losses		Securities				losses
	Trust preferred securities			—		$	—	$	—			9	$	36,179	$	8,234		9	$	36,179	$	8,234
	Municipal securities			5			4,179		58			2		3,059		186		7		7,238		244
	Corporate bonds			5			15,604		110			5		20,020		981		10		35,624		1,091
	Mortgage-backed securities
	U.S. sponsored entities			8			28,246		246			—		—		—		8		28,246		246
	Total			18		$	48,029	$	414			16	$	59,258	$	9,401		34	$	107,287	$	9,815
	The Company primarily invests in mortgage-backed securities, variable and fixed rate corporate bonds, municipal bonds, government bonds and to a lesser extent equity securities. The policy of the Company is to recognize other than temporary impairment (OTTI) on equity securities where the fair value has been significantly below cost for three consecutive quarters. Declines in the fair value of the debt securities that can be attributed to specific adverse conditions affecting the credit quality of the investment would be recorded as OTTI and charged to earnings. In order to determine if a decline in fair value is other than temporary, the Company reviews corporate ratings of the investment, analyst reports and SEC filings of the issuers. For fixed maturity investments with unrealized losses due to interest rates where the Company expects to recover the entire amortized cost basis of the security, declines in value below cost are not assumed to be other than temporary. The Company reviews its position quarterly and has asserted that at September 30, 2013, the declines outlined in the above table represent temporary declines due to changes in interest rates and are not reflections of impairment in the credit quality of the securities. Additionally, the Company does not intend to sell the investment and it is not more likely than not that the Company will be required to sell the investment before recovery of its amortized cost basis.
	The Company reviews investment debt securities on an ongoing basis for the presence of OTTI with formal reviews performed quarterly. Credit-related OTTI losses on individual securities are recognized in earnings while noncredit-related OTTI on securities not expected to be sold is recognized in accumulated other comprehensive income. There were no OTTI losses on individual securities during the quarter or nine months ended September 30, 2013.
	The Company holds one pooled trust preferred security that has previously been determined to be other than temporarily impaired by approximately $2.0 million, due solely to credit related factors. This security is a collateralized debt obligation currently comprised of trust preferred securities of 9 financial institutions and has a Moody’s rating of Ca, which is below investment grade. The Company utilized an independent third party to analyze this bond at June 30, 2013, and it was determined that no additional impairment exists. At September 30, 2013 the Company utilized a discounted cash flow pricing method and determined no additional impairment exists.
	Because of the subprime crisis, current markets for variable rate corporate trust preferred securities are illiquid. This includes the Company’s eight stand-alone trust preferred securities and the Company’s one pooled trust preferred security. The Company used a discounted cash flow method to price these securities due to a lack of liquidity for resale of this investment type and the absence of reliable pricing information. This method is described more fully in footnote 9, “Fair Value.”
	The following table summarizes scheduled maturities of the Company’s securities as of September 30, 2013 and December 31, 2012 excluding equity securities which have no maturity dates:
	As of September 30, 2013
	(Dollar amounts in thousands)
			Available for sale
			Weighted			Amortized		Fair
			Average Yield			cost		value
	Due in one year or less			2.83	%	$	33,273	$	33,721
	Due from one year to five years			3.12	%		173,386		179,923
Due from five to ten years			3.26	%		106,118		108,038
Due after ten years			3.08	%		735,400		743,990
			3.1	%	$	1,048,177	$	1,065,672
As of December 31, 2012
(Dollar amounts in thousands)
		Available for sale
		Weighted			Amortized		Fair
		Average Yield			cost		value
Due in one year or less			3.8	%	$	19,137	$	19,411
Due from one year to five years			3.05	%		187,595		195,182
Due from five to ten years			3.27	%		108,288		111,879
Due after ten years			3.3	%		749,285		782,486
			3.26	%	$	1,064,305	$	1,108,958
For purposes of the maturity table, mortgage backed securities, which are not due at a single maturity date, have been allocated over maturity groupings based on weighted-average contractual maturities of underlying collateral. The mortgage-backed securities may mature earlier than their weighted-average contractual maturities because of principal prepayments.
The proceeds from the sale of securities for the nine month period ended September 30, 2013 was $2.0 million resulting in gross realized gains of $525,000. The proceeds from the sale of securities for the nine month period ended September 30, 2012 was $1.1 million resulting in gross realized gains of $464,000. There were no gross realized losses for the nine months ended September 30, 2013 and September 30, 2012, respectively.

Loans_Receivable

Loans Receivable	9 Months Ended
	Sep. 30, 2013
Receivables [Abstract]	'
Loans Receivable	'
	3	Loans Receivable
	The Company’s loans receivable as of the respective dates are summarized as follows:
	(Dollar amounts In thousands)
			September 30,			December 31,
			2013			2012
	Mortgage loans:
	Residential real estate
	Single family		$	335,419		$	326,005
	Multi family			38,291			33,472
	Construction			46,323			46,418
	Total residential real estate			420,033			405,895
	Commercial real estate
	Commercial			79,299			81,077
	Construction			16,816			15,878
	Total commercial real estate			96,115			96,955
	Subtotal mortgage loans			516,148			502,850
	Other loans:
	Consumer loans
	Home equity loans			82,193			80,418
	Dealer auto and RV loans			48,003			46,571
	Other loans			7,097			7,896
	Total consumer loans			137,293			134,885
	Commercial business			51,148			54,445
	Subtotal other loans			188,441			189,330
	Total loans receivable			704,589			692,180
	Less:
	Allowance for loan losses			6,713			6,709
	Deferred loan fees and net discounts			(2,133	)		(1,862	)
	Loans in process			16,305			15,247
	Subtotal			20,885			20,094
	Net loans receivable		$	683,704		$	672,086
	At September 30, 2013 and December 31, 2012, the Company conducted its business through 23 offices in Allegheny, Beaver, Butler and Lawrence counties in Pennsylvania which also serves as its primary lending area. Management does not believe it has significant concentrations of credit risk to any one group of borrowers given its underwriting and collateral requirements.
	Management has an established methodology to determine the adequacy of the allowance for loan losses that assesses the risks and losses inherent in the loan portfolio. For purposes of determining the allowance for loan losses, the Company has segmented certain loans in the portfolio by product type. Loans are segmented into the following pools: commercial business loans, commercial real estate loans, residential real estate loans and consumer loans. The Company sub-segments residential real estate loans into the following three classes: single family, construction and multi-family. Commercial real estate is sub-segmented into commercial and construction classes. The Company also sub-segments the consumer loan portfolio into the following three classes: home equity, dealer automobile and recreational vehicle (RV) and other consumer loans. Historical loss percentages for each risk category are calculated and used as the basis for calculating allowance allocations. These historical loss percentages are calculated over a three year period for all portfolio segments. Certain qualitative factors are then added to the historical loss percentages to get the adjusted factor to be applied to non classified loans. The following qualitative factors are analyzed for each portfolio segment:
		•		Levels of and trends in delinquencies and nonaccruals
		•		Changes in lending policies and procedures
		•		Volatility of losses within each risk category
		•		Loans and Lending staff acquired through acquisition
		•		Economic trends
		•		Concentrations of credit
		•		Trends in volume and terms
		•		Experience depth and ability of management
	These qualitative factors are reviewed each quarter and adjusted based upon relevant changes within the portfolio. During the first nine months of 2013, the qualitative factors for trends in volume and terms were increased for mortgages including single family 1-4, multi-family and commercial real estate as well as other consumer and commercial loans.
	In terms of the Company’s loan portfolio, the commercial and industrial loans and commercial real estate loans are deemed to have more risk than the consumer real estate loans and other consumer loans in the portfolio. The commercial loans not secured by real estate are highly dependent on financial condition and are more dependent on economic conditions. The commercial loans secured by real estate are also dependent on economic conditions but generally have stronger forms of collateral. More recently, commercial real estate has been negatively impacted by devaluation so these commercial loans carry a higher qualitative factor for changes in the value of collateral. The commercial loans and commercial real estate loans have historically been responsible for the majority of the Company’s delinquencies, non-accrual loans, and charge-offs so both of these categories carry higher qualitative factors than consumer loans. The Company has historically experienced very low levels of consumer loan charge-offs so these qualitative factors are set lower than the commercial real estate and commercial and industrial loans.
	Loans by Segment
	The total allowance reflects management’s estimate of loan losses inherent in the loan portfolio at the statement of financial condition date. The Company considers the allowance for loan losses of $6.7 million adequate to cover loan losses inherent in the loan portfolio, at September 30, 2013. The following tables present by portfolio segment, the changes in the allowance for loan losses for the three and nine month periods ended September 30, 2013 and 2012:
	Three months ended September 30, 2013
	(Dollar amounts in thousands)
						Commercial
			Commercial			Real Estate			Consumer		Residential			Unallocated			Total
	Allowance for loan losses:
	Beginning balance		$	543		$	2,102		$	1,062	$	2,425		$	596		$	6,728
	Charge-offs			17			—			93		13			—			123
	Recoveries			—			—			33		—			—			33
	Provision			18			63			34		(40	)		—			75
	Reallocations			(44	)		(107	)		63		233			(145	)		—
	Ending Balance		$	500		$	2,058		$	1,099	$	2,605		$	451		$	6,713
	Three months ended September 30, 2012
	(Dollar amounts in thousands)
						Commercial
			Commercial			Real Estate			Consumer		Residential			Unallocated			Total
	Allowance for loan losses:
	Beginning balance		$	434		$	2,299		$	1,004	$	2,519		$	485		$	6,741
	Charge-offs			32			163			206		153			—			554
Recoveries			—			—			27		—			—			27
Provision			94			—			174		82			—			350
Reallocations			—			(62	)		—		97			(35	)		—
Ending Balance		$	496		$	2,074		$	999	$	2,545		$	450		$	6,564
Nine months ended September 30, 2013
(Dollar amounts in thousands)
					Commercial
		Commercial			Real Estate			Consumer		Residential			Unallocated			Total
Allowance for loan losses:
Beginning balance		$	550		$	2,075		$	1,031	$	2,541		$	512		$	6,709
Charge-offs			17			7			346		24			2			396
Recoveries			—			—			100		—			—			100
Provision			38			138			72		52			—			300
Reallocations			(71	)		(148	)		242		36			(59	)		—
Ending Balance		$	500		$	2,058		$	1,099	$	2,605		$	451		$	6,713
Nine months ended September 30, 2012
(Dollar amounts in thousands)
					Commercial
		Commercial			Real Estate			Consumer		Residential			Unallocated			Total
Allowance for loan losses:
Beginning balance		$	384		$	2,442		$	1,045	$	2,115		$	551		$	6,537
Charge-offs			32			163			445		277			—			917
Recoveries			—			—			77		17			—			94
Provision			144			—			322		384			—			850
Reallocations			—			(205	)		—		306			(101	)		—
Ending Balance		$	496		$	2,074		$	999	$	2,545		$	450		$	6,564
The following tables present by portfolio segment, the recorded investment in loans at September 30, 2013 and December 31, 2012:
As of September 30, 2013
(Dollar amounts in thousands)
					Commercial
		Commercial			Real Estate			Consumer		Residential			Unallocated			Total
Allowance for loan losses:
Ending balance: individually evaluated for impairment		$	—		$	1,063		$	49	$	—		$	—		$	1,112
Ending balance: collectively evaluated for impairment		$	500		$	995		$	1,050	$	2,605		$	451		$	5,601
Loans Receivable:
Ending Balance		$	51,148		$	96,115		$	137,293	$	420,033		$	—		$	704,589
Ending balance: individually evaluated for impairment		$	—		$	14,688		$	394	$	2,207		$	—		$	17,289
Ending balance: collectively evaluated for impairment		$	51,148		$	81,427		$	136,899	$	417,826		$	—		$	687,300
As of December 31, 2012
(Dollar amounts in thousands)
					Commercial
		Commercial			Real Estate			Consumer		Residential			Unallocated			Total
Allowance for loan losses:
Ending balance: individually evaluated for impairment		$	—		$	1,110		$	54	$	—		$	—		$	1,164
Ending balance: collectively evaluated for impairment		$	550		$	965		$	977	$	2,541		$	512		$	5,545
Loans Receivable:
Ending Balance		$	54,445		$	96,955		$	134,885	$	405,895		$	—		$	692,180
Ending balance: individually evaluated for impairment		$	—		$	13,414		$	327	$	2,163		$	—		$	15,904
Ending balance: collectively evaluated for impairment		$	54,445		$	83,541		$	134,558	$	403,732		$	—		$	676,276
Credit Quality Information
The following tables represent credit exposures by internally assigned grades as of September 30, 2013 and December 31, 2012. The grading analysis estimates the capability of the borrower to repay the contractual obligations of the loan agreements as scheduled or at all. The Company’s internal credit risk grading system is based on experiences with similarly graded loans.
The Company’s internally assigned grades are as follows:
Pass – loans which are protected by the current net worth and paying capacity of the obligor or by the value of the underlying collateral.
Special Mention – loans where a potential weakness or risk exists, which could cause a more serious problem if not corrected.
Substandard – loans that have a well-defined weakness based on objective evidence and be characterized by the distinct possibility that the Bank will sustain some loss if the deficiencies are not corrected.
Doubtful – loans classified as doubtful have all the weaknesses inherent in a substandard asset. In addition, these weaknesses make collection or liquidation in full highly questionable and improbable, based on existing circumstances.
Loss – loans classified as a loss are considered uncollectible, or of such value that continuance as an asset is not warranted.
As of September 30, 2013
(Dollar amounts in thousands)
		Residential			Residential			Commercial		Commercial			Commercial
		Real Estate			Real Estate			Real Estate		Real Estate
		Multi - family			Construction			Commercial		Construction
Pass		$	38,291		$	42,563		$	64,903	$	16,816		$	51,071
Special Mention			—			681			1,369		—			22
Substandard			—			3,079			13,027		—			55
Doubtful			—			—			—		—			—
Loss			—			—			—		—			—
Ending Balance		$	38,291		$	46,323		$	79,299	$	16,816		$	51,148
As of December 31, 2012
(Dollar amounts in thousands)
		Residential			Residential			Commercial		Commercial			Commercial
		Real Estate			Real Estate			Real Estate		Real Estate
		Multi - family			Construction			Commercial		Construction
Pass		$	33,472		$	41,138		$	65,696	$	15,878		$	53,883
Special Mention			—			4,477			1,334		—			527
Substandard			—			803			14,047		—			35
Doubtful			—			—			—		—			—
Loss			—			—			—		—			—
Ending Balance		$	33,472		$	46,418		$	81,077	$	15,878		$	54,445
The following tables present performing and nonperforming single family residential and consumer loans based on payment activity as of September 30, 2013 and December 31, 2012. Payment activity is reviewed by management on a monthly basis to determine how loans are performing. Loans are considered to be nonperforming when they become 90 days delinquent.
As of September 30, 2013
(Dollar amounts in thousands)
		Residential Real Estate			Consumer			Dealer		Other
		Single Family			Home Equity			Auto and RV		Consumer
Performing		$	331,904		$	81,892		$	47,832	$	7,017
Nonperforming			3,515			301			171		80
Total		$	335,419		$	82,193		$	48,003	$	7,097
As of December 31, 2012
(Dollar amounts in thousands)
		Residential Real Estate			Consumer			Dealer		Other
		Single Family			Home Equity			Auto and RV		Consumer
Performing		$	322,662		$	80,124		$	46,450	$	7,787
Nonperforming			3,343			294			121		109
Total		$	326,005		$	80,418		$	46,571	$	7,896
Nonperforming loans also include certain loans that have been modified and classified as troubled debt restructuring (TDR) where economic concessions have been granted to borrowers who have experienced or are expected to experience financial difficulties. These concessions typically result from the Company’s loss mitigation activities and could include reductions in the interest rate, payment extensions, forgiveness of principal, forbearance or other actions. Delinquent TDRs are classified as nonperforming at the time of restructure and may only be returned to performing status after considering the borrower’s sustained repayment performance for a reasonable period, generally six months.
Non-performing loans, which include non-accrual loans and TDRs, were $6.8 million and $7.4 million at September 30, 2013 and December 31, 2012, respectively. The TDRs included in non-performing loans amounted to $112,000 and $368,000 at September 30, 2013 and December 31, 2012, respectively. The Company also had TDR’s that were in compliance with their modified terms of $10.6 million and $8.2 million at September 30, 2013 and December 31, 2012, respectively. The Company is not committed to lend additional funds to debtors whose loans are on non-accrual status.
Age Analysis of Past Due Loans Receivable by Class
The following tables are an aging analysis of the investment of past due loans receivable as of September 30, 2013 and December 31, 2012:
(Dollar amounts in thousands)
As of September 30, 2013
		30-59 Days			60-89 Days			90 Days		Total Past			Current			Total Loans		Recorded
		Past Due			Past Due			Or Greater		Due						Receivable		Investment >
																		90 Days and
																		Accruing
Residential real estate
Single family		$	855		$	383		$	3,515	$	4,753		$	330,666		$	335,419	$	—
Construction			—			—			—		—			38,291			46,323		—
Multi-family			—			—			—		—			46,323			38,291		—
Commercial Real Estate
Commercial			75			397			2,631		3,103			76,196			79,299		—
Construction			—			—			—		—			16,816			16,816		—
Consumer
Consumer - home equity			129			—			237		366			81,827			82,193		—
Consumer - dealer auto and RV			433			172			169		774			47,229			48,003		—
Consumer - other			17			4			80		101			6,996			7,097		—
Commercial			1			—			33		34			51,114			51,148		—
Total		$	1,510		$	956		$	6,665	$	9,131		$	695,458		$	704,589	$	—
(Dollar amounts in thousands)
As of December 31, 2012
		30-59 Days			60-89 Days			90 Days		Total Past			Current			Total Loans		Recorded
		Past Due			Past Due			Or Greater		Due						Receivable		Investment >
																		90 Days and
																		Accruing
Residential real estate
Single family		$	887		$	420		$	3,343	$	4,650		$	321,355		$	326,005	$	—
Construction			—			—			—		—			46,418			46,418		—
Multi-family			—			—			—		—			33,472			33,472		—
Commercial Real Estate
Commercial			246			598			3,211		4,055			77,022			81,077		—
Construction			—			—			—		—			15,878			15,878		—
Consumer
Consumer - home equity			219			—			223		442			79,976			80,418		—
Consumer - dealer auto and RV			771			230			104		1,105			45,466			46,571		—
Consumer - other			70			12			109		191			7,705			7,896		—
Commercial			—			2			35		37			54,408			54,445		—
Total		$	2,193		$	1,262		$	7,025	$	10,480		$	681,700		$	692,180	$	—
Impaired Loans
Management considers commercial loans, commercial real estate loans and development loans which are 90 days or more past due to be impaired. Larger commercial loans, commercial real estate loans and development loans which are 60 days or more past due, including any troubled debt restructuring, are selected for impairment testing. These loans are analyzed to determine if it is probable that all amounts will not be collected according to the contractual terms of the loan agreement. If management determines that the fair value of the impaired loan is less than the recorded investment in the loan, impairment is recognized through a provision for loan loss estimate or a charge-off to the allowance for loan losses. The Company collectively reviews all residential real estate and consumer loans for impairment.
The following tables summarize impaired loans:
Impaired Loans
As of September 30, 2013 and December 31, 2012
(Dollar amounts in thousands)
		30-Sep-13								31-Dec-12
		Recorded			Unpaid			Related		Recorded			Unpaid			Related
		Investment			Principal			Allowance		Investment			Principal			Allowance
					Balance								Balance
With no related allowance recorded:
Commercial Real Estate		$	5,532		$	5,639		$	—	$	5,433		$	5,540		$	—
Residential single family			1,357			1,357			—		1,360			1,360
Residential construction loans			850			850			—		803			803
Consumer loans
Home Equity			211			236			—		130			130			—
Dealer auto and RV			8			8			—		14			14			—
With an allowance recorded:
Commercial Real Estate			9,156			9,319			1,063		7,981			8,144			1,110
Consumer Loans:
Home Equity			172			150			46		179			179			50
Dealer auto and RV			3			3			3		4			4			4
Total:
Commercial Real Estate			14,688			14,958			1,063		13,414			13,684			1,110
Consumer			394			397			49		327			327			54
Residential single family			1,357			1,357			—		1,360			1,360			—
Residential construction			850			850			—		803			803			—
Total		$	17,289		$	17,562		$	1,112	$	15,904		$	16,174		$	1,164
(Dollar amounts in thousands)
		Three months ended						Three months ended
		September 30, 2013						September 30, 2012
		Average			Interest			Average		Interest
		Recorded			Income			Recorded		Income
		Investment			Recognized			Investment		Recognized
With no related allowance recorded:
Commercial Real Estate:
Commercial Real Estate		$	5,562		$	57		$	5,451	$	58
Residential loans			1,358			3			1,361		2
Residential construction loans			885			7			102		10
Consumer Loans:
Home equity			198			4			91		10
Dealer auto and RV			9			—			—		—
With an allowance recorded:
Commercial Real Estate:
Commercial Real Estate			9,176			116			8,248		105
Consumer Loans:
Home equity			172			3			152		1
Dealer auto and RV			3			—			—		—
Commercial business loans			—			—			37		2
Total:
Commercial Real Estate		$	14,738		$	173		$	13,699	$	163
Consumer			382			7			243		11
Residential			1,358			3			1,361		2
Residential construction loans			885			7			102		10
Commercial			—			—			37		2
(Dollar amounts in thousands)
		Nine months ended						Nine months ended
		September 30, 2013						September 30, 2012
		Average			Interest			Average		Interest
		Recorded			Income			Recorded		Income
		Investment			Recognized			Investment		Recognized
With no related allowance recorded:
Commercial Real Estate:
Commercial Real Estate		$	5,325		$	177		$	5,488	$	170
Residential loans			1,359			7			1,362		7
Residential construction loans			894			25			421		32
Consumer Loans:
Home equity			179			10			43		10
Dealer auto and RV			10			2			—		—
With an allowance recorded:
Commercial Real Estate:
Commercial Real Estate			8,512			374			8,353		319
Consumer Loans:
Home equity			174			8			153		6
Dealer auto and RV			4			—			—		—
Commercial business loans			—			—			41		2
Total:
Commercial Real Estate		$	13,837		$	551		$	13,841	$	489
Consumer			367			20			196		16
Residential			1,359			7			1,362		7
Residential construction loans			894			25			421		32
Commercial			—			—			41		2
Nonaccrual Loans
Loans are considered nonaccrual upon reaching 90 days delinquent, although the Company may be receiving partial payments of interest and partial repayments of principal on such loans. When a loan is placed in nonaccrual status, previously accrued but unpaid interest is deducted from interest income.
On the following table are the loans receivable and TDR’s on nonaccrual status as of September 30, 2013 and December 31, 2012. The balances are presented by class of loans:
(Dollar amounts in thousands)
		September 30,			December 31,
		2013			2012
Commercial		$	33		$	35
Commercial Real Estate			2,631			3,432
Consumer
Consumer - Home Equity			237			293
Consumer - Dealer auto and RV			168			121
Consumer - Other			80			109
Residential			3,516			3,403
Total		$	6,665		$	7,393
Modifications
The Company’s loan portfolio also includes TDR’s, where economic concessions have been granted to borrowers who have experienced or are expected to experience financial difficulties. These concessions typically result from the Company’s loss mitigation activities and could include reductions in the interest rate, payment extensions, forgiveness of principal, forbearance or other actions. Delinquent TDRs are classified as nonperforming at the time of restructure and may only be returned to performing status after considering the borrower’s sustained repayment performance for a reasonable period, generally six months.
When the Company modifies a loan, management evaluates any possible impairment based on the present value of expected future cash flows, discounted at the contractual interest rate of the original loan agreement, except when the sole (remaining) source of repayment for the loan is the operation or liquidation of the collateral. In these cases, management uses the current fair value of the collateral, less selling costs, instead of discounted cash flows. If management determines that the value of the modified loan is less than the recorded investment in the loan (net of previous charge-offs, deferred loan fees or costs and unamortized premium or discount), impairment is recognized by segment or class of loan, as applicable, through an allowance estimate or a charge-off to the allowance. Segment and class status is determined by the loan’s classification at origination.
The following table includes the recorded investment and number of modifications for modified loans for the three and nine months ended September 30, 2013 and 2012. The Company reports the recorded investment in the loans prior to a modification and also the recorded investment in the loans after the loans were restructured.
(Dollar amounts in thousands)
		For the Three Months ended
		September 30, 2013
					Pre-Modification			Post-Modification Recorded Investment
					Outstanding
		Number of			Recorded			Maturity Date		Deferral of			Other			Total
		Contracts			Investment			Extension		Principal Payments
Troubled Debt Restructurings
Consumer
Home equity			1		$	25		$	25		—		$	—		$	25
Troubled Debt Restructurings			1		$	25		$	25	$	—		$	—		$	25
(Dollar amounts in thousands)
		For the Three Months ended
		September 30, 2012
					Pre-Modification			Post-Modification Recorded Investment
					Outstanding
		Number of			Recorded			Maturity Date		Deferral of			Other			Total
		Contracts			Investment			Extension		Principal Payments
Troubled Debt Restructurings
Consumer
Home equity			6		$	139		$	139	$	—		$	—		$	139
Troubled Debt Restructurings			6		$	139		$	139	$	—		$	—		$	139
(Dollar amounts in thousands)
		For the Nine Months ended
		September 30, 2013
					Pre-Modification			Post-Modification Recorded Investment
					Outstanding
		Number of			Recorded			Maturity Date		Deferral of			Other			Total
		Contracts			Investment			Extension		Principal Payments
Troubled Debt Restructurings
Commercial real estate			12		$	2,331		$	26	$	—		$	2,305		$	2,331
Consumer
Home equity			7			116			116		—			—			116
Troubled Debt Restructurings			19		$	2,447		$	142	$	—		$	2,305		$	2,447
(Dollar amounts in thousands)
		For the Nine Months ended
		September 30, 2012
					Pre-Modification			Post-Modification Recorded Investment
					Outstanding
		Number of			Recorded			Maturity Date		Deferral of			Other			Total
		Contracts			Investment			Extension		Principal Payments
Troubled Debt Restructurings
Residential construction			3		$	947		$	947	$	—		$	—		$	947
Commercial real estate			1			100			—		—			100			100
Consumer
Home equity			6			139			139		—			—			139
Troubled Debt Restructurings			10		$	1,186		$	1,086	$	—		$	100		$	1,186
The Company did not have any TDR’s that defaulted subsequent to their modification during the periods reported.

Deposits

Deposits	9 Months Ended
	Sep. 30, 2013
Banking And Thrift [Abstract]	'
Deposits	'
	4	Deposits
	The Company’s deposits as of the respective dates are summarized as follows:
	(Dollar amounts in thousands)
			September 30, 2013					December 31, 2012
	Type of accounts		Amount		%			Amount		%
	Noninterest-bearing deposits		$	126,214		10.2	%	$	109,964		9.3	%
	NOW account deposits			248,178		20.1	%		223,736		19	%
	Money Market deposits			41,226		3.3	%		39,255		3.3	%
	Passbook account deposits			177,747		14.4	%		173,343		14.7	%
	Time deposits			639,069		52	%		631,759		53.7	%
			$	1,232,434		100	%	$	1,178,057		100	%
	Time deposits mature as follows:
	Within one year		$	417,278		65.2	%	$	375,862		59.6	%
	After one year through two years			124,448		19.5	%		118,333		18.7	%
	After two years through three years			59,889		9.4	%		78,492		12.4	%
	After three years through four years			19,053		3	%		36,920		5.8	%
	After four years through five years			13,216		2.1	%		17,106		2.7	%
	Thereafter			5,185		0.8	%		5,046		0.8	%
			$	639,069		100	%	$	631,759		100	%

Borrowed_Funds

Borrowed Funds	9 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]	'
Borrowed Funds	'
	5	Borrowed Funds
	The Company’s borrowed funds as of the respective dates are summarized as follows:
	(Dollar amounts in thousands)
			September 30, 2013					December 31, 2012
			Weighted			Amount		Weighted			Amount
			average					average
			rate					rate
	FHLB advances:
	Due within 12 months			2.42	%	$	118,817		2.69	%	$	100,147
	Due beyond 12 months but within 2 years			2.14	%		29,288		2.88	%		71,392
	Due beyond 2 years but within 3 years			1.02	%		47,456		3.13	%		15,873
	Due beyond 3 years but within 4 years			1.29	%		43,426		2.15	%		8,013
	Due beyond 4 years but within 5 years			3.08	%		12,816		1.03	%		7,807
	Due beyond 5 years			—			—		3.61	%		10,000
						$	251,803				$	213,232
	Repurchase agreements:
	Due within 12 months			2.69	%	$	78,000		2.99	%	$	148,000
	Due beyond 12 months but within 2 years			4.12	%		10,000		3.07	%		40,000
	Due beyond 2 years but within 3 years			—			—		4.12	%		10,000
	Due beyond 3 years but within 4 years			4.28	%		25,000		—			—
	Due beyond 4 years but within 5 years			4.49	%		45,000		4.28	%		25,000
	Due beyond 5 years			—			—		4.49	%		45,000
						$	158,000				$	268,000
	Other borrowings:
	ESOP borrowings
	Due within 12 months			4.68	%	$	1,000		4.68	%	$	1,000
	Due beyond 12 months but within 2 years			4.68	%		1,000		4.68	%		1,000
	Due beyond 2 years but within 3 years			4.68	%		500		4.68	%		1,000
	Due beyond 3 years but within 4 years			—			—		4.68	%		250
						$	2,500				$	3,250
	Corporate borrowings
	Due within 12 months			3.75	%	$	1,000		—			—
	Due beyond 12 months but within 2 years			3.75	%		1,000		—			—
	Due beyond 2 years but within 3 years			3.75	%		1,000		—			—
	Due beyond 3 years but within 4 years			3.75	%		1,000		—			—
	Due beyond 4 years but within 5 years			3.75	%		5,967		—			—
						$	9,967				$	—
	Borrowings for joint ventures
	Due beyond 4 years but within 5 years			—		$	—		3.75	%	$	74
	Junior subordinated notes
	Due beyond 5 years			2.08	%	$	36,083		2.41	%	$	46,393
	Included in the $251.8 million of FHLB advances at September 30, 2013 are $40.0 million in structured advances with imbedded caps at various strike rates based on the 3 month LIBOR rate. If during the term of the advance, the 3 month LIBOR rate exceeds the strike rate, the interest rate on the structured advance is reduced by the difference between the rate and the strike rate.
	Included in the $158.0 million of Repurchase Agreements (REPOs), at September 30, 2013, are $20.0 million in structured REPOs with imbedded caps at various strike rates based on the 3 month LIBOR rate. If during the term of the REPO, the 3 month LIBOR rate exceeds the strike rate, the interest rate on the structured REPO is reduced by the difference between the rate and the strike rate.
	Also included in the $158.0 million of REPOs at September 30, 2013 is a $25.0 million structured REPO in which the Company pays a fixed rate of interest. At the reset date and every quarterly period thereafter, the counterparty has the right to terminate the transaction. It has historically been the Company’s position to pay off any borrowings and replace them with fixed rate funding if converted by the counterparty.
	The Company enters into sales of securities under agreements to repurchase. Such REPO’s are treated as borrowed funds. The dollar amount of the securities underlying the agreements remains in their respective asset accounts.
	REPOs are collateralized by various securities that are either held in safekeeping at the FHLB or delivered to the dealer who arranged the transaction and the Company maintains control of these securities.
	The market value of such securities exceeded the amortized cost of the securities sold under agreements to repurchase. The fair value of the securities as of September 30, 2013 was $192.1 million with an amortized cost of $182.0 million. The fair value of the securities as of December 31, 2012 was $318.9 million with an amortized cost of $297.8 million. The average maturity date of the mortgage backed securities sold under agreements to repurchase was greater than 90 days for the periods ended September 30, 2013 and December 31, 2012.
	As of September 30, 2013 and December 31, 2012, the Company had REPO’s with Citigroup of $65.0 million and $115.0 million respectively, Barclays Capital of $30.0 million and $40.0 million, respectively, Credit Suisse of $43.0 million and $83.0 million, respectively and Morgan Stanley of $20.0 million and $30.0 million, respectively.
	As of September 30, 2013, the REPO’s with Citigroup had $11.4 million at risk (where the fair value of the securities exceeds the borrowing), with a weighted average maturity of 19 months, Barclays Capital had $6.0 million at risk with a weighted average maturity of 46 months, Credit Suisse had $13.0 million at risk with a weighted average maturity of 36 months and Morgan Stanley had $3.6 million at risk with a weighted average maturity of 9 months.
	Borrowings under REPO averaged $158.0 million and $181.3 million during the three months and nine months ended September 30, 2013, respectively. The maximum amount outstanding at any month-end was $158.0 million and $258.0 million during the three and nine months ended September 30, 2013, respectively.
	The junior subordinated notes have various maturities, interest rate structures and call dates. The characteristics of these notes are detailed in the following paragraphs.
	On April 10, 2003, ESB Capital Trust II (Trust II), a statutory business trust established under Delaware law that is a subsidiary of the Company, issued $10.0 million variable rate preferred securities with a stated value and liquidation preference of $1,000 per share. The Company purchased $310,000 of common securities of Trust II. The dividend rate on the preferred securities reset quarterly to equal the LIBOR plus 3.25%. Trust II’s obligations under the preferred securities issued are fully and unconditionally guaranteed by the Company. The proceeds from the sale of the preferred securities and the common securities were utilized by the Trust II to invest in $10.3 million of variable rate subordinated debt of the Company. The subordinated debt is unsecured and ranks subordinate and junior in right of payment to all indebtedness, liabilities and obligations of the Company. The subordinated debt primarily represents the sole assets of the Trust II. Dividends on the preferred securities is cumulative and payable quarterly in arrears. The Company has the right to optionally redeem the subordinated debt prior to the maturity date of April 24, 2033, on or after April 24, 2008, at the redemption price, plus accrued and unpaid distributions, if any, at the redemption date. Under the occurrence of certain events, specifically, a tax event, investment company event or capital treatment event as more fully defined in the Indenture dated April 10, 2003, the Company may redeem in whole, but not in part, the subordinated debt at any time within 90 days following the occurrence of such event. Proceeds from any redemption of the subordinated debt would cause a mandatory redemption of the preferred securities and the common securities having an aggregate liquidation amount equal to the principal amount of the subordinated debt redeemed. On July 23, 2008, the Company redeemed $5.0 million of the preferred securities of ESB Capital Trust II with proceeds from a $14.0 million loan with First Tennessee Bank National Association (“First Tennessee”). The remainder of the First Tennessee loan was used to repay an existing loan with First Tennessee with a remaining balance of $9.0 million, which had an interest rate of 5.55% and was due on December 31, 2008. No unamortized deferred debt issuance costs remain on this issuance. On January 24, 2013, the Company redeemed the remaining subordinated debt and securities of ESB Capital Trust II with $5.0 million of the proceeds from a $10.0 million loan with WesBanco, with a fixed interest rate of 3.75%. The remaining $5.0 million of the WesBanco loan was drawn on March 15, 2013 and used to redeem the subordinated debt and securities of ESB Capital Trust III.
	On December 17, 2003, ESB Statutory Trust (Trust III), a statutory business trust established under Delaware law that is a subsidiary of the Company, issued $5.0 million variable rate preferred securities with a stated value and liquidation preference of $1,000 per share. The Company purchased $155,000 of common securities of Trust III. The preferred securities reset quarterly to equal the LIBOR Index plus 2.95%. Trust III’s obligations under the preferred securities issued are fully and unconditionally guaranteed by the Company. The proceeds from the sale of the preferred securities and the common securities were utilized by Trust III to invest in $5.2 million of variable rate subordinated debt of the Company. The subordinated debt is unsecured and ranks subordinate and junior in right of payment to all indebtedness, liabilities and obligations of the Company. The subordinated debt primarily represents the sole assets of Trust III. Interest on the preferred securities is cumulative and payable quarterly in arrears. The Company has the right to optionally redeem the subordinated debt prior to the maturity date of December 17, 2033, on or after December 17, 2008, at the redemption price, plus accrued and unpaid distributions, if any, at the redemption date. Under the occurrence of certain events, specifically, a tax event, investment company event or capital treatment event as more fully defined in the Indenture dated December 17, 2003; the Company may redeem in whole, but not in part, the subordinated debt at any time within 90 days following the occurrence of such event. Proceeds from any redemption of the subordinated debt would cause a mandatory redemption of the preferred securities and the common securities having an aggregate liquidation amount equal to the principal amount of the subordinated debt redeemed. No unamortized deferred debt issuance costs remain on this issuance. On March 18, 2013, the Company redeemed the subordinated debt and securities of ESB Capital Trust III with a $5.0 million of the aforementioned proceeds of the $10.0 million loan from WesBanco.
	On February 10, 2005, ESB Capital Trust IV (Trust IV), a statutory business trust established under Delaware law that is a subsidiary of the Company, issued $35.0 million fixed rate preferred securities. The Company purchased $1.1 million of common securities of Trust IV. The preferred securities are fixed at a rate of 6.03% for six years and then are variable at three month LIBOR plus 1.82%. The preferred securities have a stated maturity of thirty years. Trust IV’s obligations under the preferred securities issued are fully and unconditionally guaranteed by the Company. The proceeds from the sale of the preferred securities and the common securities were utilized by Trust IV to invest in $36.1 million of fixed/variable rate subordinated debt of the Company. The subordinated debt is unsecured and ranks subordinate and junior in right of payment to all indebtedness, liabilities and obligations of the Company. The subordinated debt primarily represents the sole assets of Trust IV. Interest on the preferred securities is cumulative and payable quarterly in arrears. The Company has the right to optionally redeem the subordinated debt prior to the maturity date of February 10, 2035, on or after February 10, 2011, at the redemption price, which is equal to the liquidation amount, plus accrued and unpaid distributions, if any, at the redemption date. Under the occurrence of certain events, specifically, a tax event, investment company event or capital treatment event as more fully defined in the Indenture dated February 10, 2005, the Company may redeem in whole, but not in part, the subordinated debt at any time within 90 days following the occurrence of such event. Proceeds from any redemption of the subordinated debt would cause a mandatory redemption of the preferred securities and the common securities having an aggregate liquidation amount equal to the principal amount of the subordinated debt redeemed. The Company did not have any deferred debt issuance costs associated with the preferred securities.

Net_Income_Per_Share

Net Income Per Share	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Net Income Per Share	'
	6	Net Income Per Share
	The following table summarizes the Company’s net income per share:
	(Amounts, except earnings per share, in thousands)
			Three Months		Three Months
			Ended		Ended
			September 30, 2013		September 30, 2012
	Net income		$	3,971	$	3,934
	Weighted-average common shares outstanding			17,410		17,235
	Basic earnings per share		$	0.23	$	0.23
	Weighted-average common shares outstanding		$	17,410	$	17,235
	Common stock equivalents due to effect of stock options			193		154
	Total weighted-average common shares and equivalents			17,603		17,389
	Diluted earnings per share		$	0.23	$	0.22
			Nine Months		Nine Months
			Ended		Ended
			30-Sep-13		30-Sep-12
	Net income		$	11,561	$	11,400
	Weighted-average common shares outstanding			17,359		17,195
	Basic earnings per share		$	0.67	$	0.66
	Weighted-average common shares outstanding		$	17,359	$	17,195
	Common stock equivalents due to effect of stock options			171		155
	Total weighted-average common shares and equivalents			17,530		17,350
	Diluted earnings per share		$	0.66	$	0.66
	The shares controlled by the Company’s Employee Stock Ownership Plan (ESOP) of 296,095 and 395,587 at September 30, 2013 and September 30, 2012, respectively, are not considered in the weighted average shares outstanding until the shares are committed for allocation to an employee’s individual account.
	Options to purchase 64,821 shares at $10.35 per diluted share expiring November 2020, 77,872 shares at $11.00 per diluted share expiring November 2021 and 189,699 shares at $10.50 per diluted share expiring November 2022 were outstanding as of September 30, 2013, but were not included in the computation of diluted earnings per share because the options’ exercise price combined with its fair value was greater than the average market price of the common shares.
	Options to purchase 85,919 shares at $10.35 per diluted share expiring November 2020 and 91,948 shares at $11.00 per diluted share expiring November 2021, were outstanding as of September 30, 2012, but were not included in the computation of diluted earnings per share because the options’ exercise price combined with its fair value was greater than the average market price of the common shares.

Comprehensive_Income

Comprehensive Income	9 Months Ended
	Sep. 30, 2013
Equity [Abstract]	'
Comprehensive Income	'
	7	Comprehensive Income
	The Company has developed the following table to present the components of accumulated OCI, at September 30, 2013:
	(Dollar amounts in thousands)
			Three Months Ended			Nine Months Ended
			September 30, 2013			September 30, 2013
			Amount			Amount			in the Statement where net
	Details about AOCI Components		Reclassifed from AOCI			Reclassifed from AOCI			income is presented
	Available-for-sale securities
	Realized gain on sale of securities		$	(58	)	$	(525	)	Net realized gain on securities
									available for sale
				20			178		Provision for income tax expense
				(38	)		(347	)	Net of tax
	Defined benefit pension plan items
	Amortization of prior service costs			26			78		See Note 1 below
	Amortization of actuarial gains/(losses)			10			30		See Note 1 below
				36			108		Total before tax
				(12	)		(37	)	Provision for income tax expense
				24			71		Net of tax
	Total reclassifications		$	(14	)	$	(276	)	Net of tax
	Note 1: These items are included in the compensation and employee benefits. See Note 8, Retirement Plans, for additional information.
	(Dollar amounts in thousands)
			Gains/(losses) on			Unrealized gains/(losses) on			Defined benefit pension
			Cash Flow Hedges			available-for-sale securities			plan items			Total
	Beginning balance		$	(3,733	)	$	29,464		$	(628	)	$	25,103
	Other comprehensive income/(loss) before reclassification			922			(17,057	)		—			(16,135	)
	Amounts reclassified from AOCI			—			(347	)		71			(276	)
	Net current period OCI			922			(17,404	)		71			(16,411	)
	Ending Balance		$	(2,811	)	$	12,060		$	(557	)	$	8,692
	(Dollar amounts in thousands)		12/31/12
	Net unrealized gain on securities available for sale		$	29,464
	Accumulated loss on effective cash flow hedging derivatives			(3,733	)
	Net unrecognized pension cost			(628	)
	Total		$	25,103

Retirement_Plans

Retirement Plans	9 Months Ended
	Sep. 30, 2013
Compensation And Retirement Disclosure [Abstract]	'
Retirement Plans	'
	8	Retirement Plans
	Supplemental Executive Retirement Plan and Directors’ Retirement Plan
	The Company maintains a Supplemental Executive Benefit Plan (SERP) in order to provide supplemental retirement and death benefits for certain key employees of the Company. Under the SERP, participants shall receive an annual retirement benefit following retirement at age 65 equal to 25% of the participant’s final average pay multiplied by a ratio, ranging from 1.25% to 25.0%, based on the participant’s total years of service. Final average pay is based upon the participant’s last three year’s compensation. The maximum ratio of 25% requires twenty or more years of credited service and the minimum ratio of 1.25% requires one year of credited service. Benefits under the plan are payable in either a lump sum or ten equal annual payments and a lesser benefit is payable upon early retirement at age 50 with at least twelve years of service. If a participant dies prior to retirement, the participant’s estate will receive a lump sum payment equal to the net present value of future benefit payments under the plan. At September 30, 2013, the participants in the plan had credited service under the SERP ranging from 22 to 34 years.
	The Company and the Bank maintain the ESB Financial Corporation Directors’ Retirement Plan and have entered into director retirement agreements with each director of the Company and the Bank. The plan provides that any retiring director with a minimum of five or more years of service with the Company or the Bank and a minimum of 10 total years of service, including years of service with any bank acquired by the Company or the Bank, that remains in continuous service as a board member until age 75 will be entitled to receive an annual retirement benefit equal to his or her director’s fees earned during the last full calendar year prior to his or her retirement date, multiplied by a ratio, ranging from 25% to 80%, based on the director’s total years of service. The maximum ratio of 80% of fees requires 20 or more years of service and the minimum ratio of 25% of fees requires 10 years of service. Retirement benefits may also be payable under the plan if a director retires from service as a director prior to attaining age 75. Three directors are currently receiving monthly benefits under the plan.
	The following table illustrates the components of the net periodic pension cost for the SERP and Directors Retirement Plan as of September 30, 2013 and 2012:
	(Dollar amounts in thousands)
			SERP				SERP
			Three Months		Three Months		Nine Months		Nine Months
			Ended		Ended		Ended		Ended
			September 30, 2013		September 30, 2012		September 30, 2013		September 30, 2012
	Components of net periodic pension cost
	Service cost		$	25	$	20	$	75	$	60
	Interest cost			28		31		84		93
	Amortization of unrecognized gains and losses			26		20		78		60
	Amortization of prior service cost			10		10		30		30
	Net periodic pension cost		$	89	$	81	$	267	$	243
	(Dollar amounts in thousands)
			Directors’ Retirement Plan				Directors’ Retirement Plan
			Three Months		Three Months		Nine Months		Nine Months
			Ended		Ended		Ended		Ended
			September 30, 2013		September 30, 2012		September 30, 2013		September 30, 2012
	Components of net periodic pension cost
	Service cost		$	1	$	1	$	3	$	3
	Interest cost			7		9		21		27
	Amortization of prior service cost			—		22		—		67
	Net periodic pension cost		$	8	$	32	$	24	$	97

Fair_Value

Fair Value	9 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'
Fair Value	'
	9	Fair Value
	Fair value is defined by GAAP as the amount that an asset could be bought or sold, or a liability incurred or settled, between willing parties, other than during a liquidation. GAAP established a fair value hierarchy that prioritizes the use of inputs in valuation methodologies into the following three levels:
	Level I: Inputs to the valuation methodology are quoted prices, unadjusted, for identical assets or liabilities in active markets, as of the reported date. A quoted price in an active market provides the most reliable evidence of fair value and shall be used to measure fair value whenever available. A contractually binding sales price also provides reliable evidence of fair value.
	Level II: Inputs to the valuation methodology include quoted prices for similar assets or liabilities in active markets: inputs to the valuation methodology include quoted prices for identical or similar assets or liabilities in markets that are not active; or inputs to the valuation methodology that utilize the model-based techniques for which all significant assumptions are observable in the market.
	Level III: Inputs to the valuation methodology are unobservable and significant to the fair value measurement; inputs to the valuation methodology that utilize a model-based techniques for which significant assumptions are not observable in the market; or inputs to the valuation methodology that requires significant management judgment or estimation, some of which may be internally developed.
	Assets and Liabilities Measured at Fair Value on a Recurring Basis
	Investment Securities Available-for-Sale
	Management classifies the Company’s equity securities as Level 1 measurements since quoted market prices were available, unadjusted, for identical securities in active markets. Declines in the fair value of individual equity securities that are deemed to be other than temporary, will be written down to current market value and included in earnings as realized losses. Level 2 investment securities were primarily comprised of debt securities issued by states and municipalities and corporations as well as mortgage-backed securities issued by government agencies. On a monthly basis, the fair values for securities available for sale are determined by obtaining quoted prices on nationally recognized securities exchanges or matrix pricing, which is a mathematical technique widely used in the industry to value debt securities without relying exclusively on quoted prices for the specific securities but rather by relying on the securities’ relationship to other benchmark quoted securities. Due to recent uncertainties in the credit markets broadly, and the lack of both trading and new issuance of floating rate trust preferred securities, market price indications generally reflect the lack of liquidity in these markets, therefore the Company classifies these securities as Level III. Due to this lack of practical quoted prices, fair value for floating rate trust preferred securities has been determined using a discounted cash-flow technique. Cash flows are estimated based upon the contractual terms of each instrument. Market rates have been calculated based upon the five year historical discount margin for these instruments from August 2002 through August 2007, when the market was more liquid. These market rates were then adjusted for credit spreads and liquidity risk given the current markets. Credit spreads are based upon the Moody’s rating for each bond and range from 45 to 75 basis points. Liquidity risk adjustments ranged from 20 to 55 basis points where the securities of the 15 largest banks in the United States are assigned 20 to 40 basis points and banks outside of the top 15 were given a higher liquidity risk adjustment. Approximately $18.1 million or 49.30% of the $36.8 million in floating rate trust preferred securities represent investments in three of the four largest banks in the United States.
	Derivative Financial Instruments
	Derivative financial instruments recorded at fair value on a recurring basis are comprised of interest rate caps and interest rate swap agreements. The Company classifies these instruments as Level II. The Company determines the fair value of the interest rate caps quarterly by using quoted prices from two brokers. The maximum market indication used is the highest price obtained from the brokers, unless this price is Level III as indicated by the broker. If so this price is excluded and the highest Level II is used. The Company utilizes a third-party pricing service to measure its interest rate swap contracts. This service provides pricing information by utilizing evaluated pricing models, supported with market data information. Cash flows are projected for each payment date using the index forward curve. These swap cash flows are then discounted to time zero using LIBOR zero-coupon interest rates, the accepted cost of funds for a financial institution. The implicit assumption is that the risk associated with the cash flows on the derivative is the same as the risk associated with a loan in the interbank market. The present value of the fixed portion is then added to the present value of the floating portion. The sum of both is the fair market value of the interest rate swap.
	The following tables present the assets and liabilities reported on the consolidated statements of financial condition at their fair value on a recurring basis as of September 30, 2013 and December 31, 2012 by level within the fair value hierarchy. As required by GAAP, financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement.
			As of September 30, 2013
	(Dollar amounts in thousands)		Quoted Prices in			Significant Other		Significant			Total
			Active Markets			Observable Inputs		Unobservable
			for Identical			(Level II)		Inputs (Level III)
			Assets or
			Liabilities (Level I)
	Assets:
	Securities available for sale
	Trust preferred securities		$	—		$	1,720	$	36,768		$	38,488
	Municipal securities			—			179,437		—			179,437
	Equity securities			1,729			—		—			1,729
	Corporate bonds			—			214,720		—			214,720
	Mortgage backed securities
	U.S. sponsored entities			—			631,071		—			631,071
	Private label			—			1,956		—			1,956
	Subtotal mortgage-backed securities			—			633,027		—			633,027
	Total securities available for sale		$	1,729		$	1,028,904	$	36,768		$	1,067,401
	Other Assets
	Interest rate caps		$	—		$	638	$	—		$	638
	Total other assets		$	—		$	638	$	—		$	638
	Liabilities
	Other Liabilities
	Interest rate swaps		$	—		$	4,258	$	—		$	4,258
	Total other liabilities		$	—		$	4,258	$	—		$	4,258
			As of December 31, 2012
	(Dollar amounts in thousands)		Quoted Prices in			Significant Other		Significant			Total
			Active Markets			Observable Inputs		Unobservable
			for Identical			(Level II)		Inputs (Level III)
			Assets or
			Liabilities (Level I)
	Assets:
	Securities available for sale
	Trust preferred securities		$	—		$	1,848	$	36,179		$	38,027
	Municipal securities			—			190,887		—			190,887
	Equity securities			1,818			—		—			1,818
	Corporate bonds			—			225,795		—			225,795
	Mortgage backed securities
	U.S. sponsored entities			—			649,933		—			649,933
	Private label			—			4,316		—			4,316
	Subtotal mortgage-backed securities			—			654,249		—			654,249
	Total securities available for sale		$	1,818		$	1,072,779	$	36,179		$	1,110,776
	Other Assets
	Interest rate caps		$	—		$	90	$	—		$	90
	Total other assets		$	—		$	90	$	—		$	90
	Liabilities:
	Other Liabilties
	Interest rate swaps		$	—		$	5,743	$	—		$	5,743
	Total other liabilities		$	—		$	5,743	$	—		$	5,743
	There were no transfers between Level I and Level II assets measured at fair value. The following table presents the changes in the Level III assets measured at fair value on a recurring basis for the three and nine month periods ended September 30, 2013 and 2012, respectively:
	Fair value measurements using significant unobservable inputs (Level III).
	(Dollar amounts in thousands)
			Securities available for sale					Securities available for sale
		Three months ended					Nine months ended
		September 30,					September 30,
		2013			2012		2013			2012
Beginning balance January 1,		$	36,934		$	35,604	$	36,179		$	35,789
Total net realized/unrealized gains (losses)
Included in earnings:
Interest income on securities			3			4		10			11
Net realized loss on securities available for sale			—			—		—			(5	)
Included in other comprehensive income			(169	)		214		579			27
Transfers in and/or out of Level III			—			—		—			—
Purchases, issuances and settlements
Purchases			—			—		—			—
Issuances			—			—		—			—
Sales			—			—		—			—
Settlements			—			—		—			—
Ending balance, September 30,		$	36,768		$	35,822	$	36,768		$	35,822
The following table summarizes changes in unrealized gains and losses recorded in earnings for the three and nine month period ended September 30, 2013 and 2012 for Level III assets and liabilities that are still held at September 30, 2013 and 2012.
(Dollar amounts in thousands)
		Securities available for sale					Securities available for sale
		Three months ended					Nine months ended
		September 30,					September 30,
		2013			2012		2013			2012
Interest income on securities		$	3		$	4	$	10		$	11
Net realized loss on securities available for sale			—			—		—			(5	)
Total		$	3		$	4	$	10		$	6
For Level III assets measured at fair value on a recurring or non-recurring basis as of September 30, 2013, the significant observable inputs used in the fair value measurements were as follows:
(Dollar amounts in thousands)
		Fair Value at			Fair Value at		Valuation Technique		Significant Unobservable Inputs	Range ( Weighted Average)
		September 30,			December 31,
		2013			2012
Trust Preferred Securities		$	36,768		$	36,179	Discounted Cash Flow		Credit Spreads	45-75 (62.5) basis points
									Liquidity Risk Adjustments	20-55 (36) basis points
									Default Rates	.6% -1%
Impaired Loans			16,177			14,740	Discounted Cash Flow		Remaining term	0 yrs to 27.2 yrs (24 yrs)
									Discount Rate	3.625%-16.3% (6.42%)
							Appraisal of collateral		Appraisal adj and liquidation exp	2,000-500,000
Real estate acquired through foreclosure			1,977			2,441	Appraisal of collateral (1)		N/A	N/A
Servicing assets			8			14	Discounted Cash Flow		Remaining term	.2 yrs to 18 yrs (12 yrs)
									Discount Rate	11.25%-12.25% (11.51%)
-1	Fair value is generally determined through independent appraisals of the underlying collateral, which generally includes various level III inputs which are not identifiable. Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses.
The significant unobservable inputs in the fair value measurement of the Company’s trust preferred securities are the credit spreads, liquidity risk adjustments and default rates as described above under Investment Securities Available for Sale. Significant increases (decreases) in any of those inputs in isolation could result in a significantly lower (higher) fair value measurement.
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis
The Company may be required periodically to measure certain assets and liabilities at fair value on a nonrecurring basis in accordance with GAAP. These adjustments to fair value usually result from the application of lower-of-cost-or-fair value accounting or impairment write-downs of individual assets. During the three month period ended September 30, 2013 and 2012, the Company incurred write-downs on its REO properties of $6,000 and $7,000, respectively. During the nine month periods ended September 30, 2013 and 2012, the Company incurred write-downs on its REO properties of $56,000 and $368,000, respectively. There were no adjustments to the fair value for the Company’s remaining assets and liabilities measured at fair value on a nonrecurring basis in accordance with GAAP during the respective periods.

Financial_Instruments

Financial Instruments	9 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'
Financial Instruments	'
	10	Financial Instruments
	In the ordinary course of business, the Company has entered into off-balance sheet financial instruments, consisting of commitments to extend credit, commitments under line of credit lending arrangements and letters of credit. Such financial instruments are recorded in the financial statements when they are funded or related fees are received.
	The following methods and assumptions were used in estimating fair values of financial instruments.
	Cash and cash equivalents – The carrying amounts of cash equivalents approximate their fair values.
	Securities – With the exception of floating rate trust preferred securities ( the valuation of the trust preferred securities is discussed in footnote 9, Fair Value), fair values for securities available for sale are determined by obtaining quoted prices on nationally recognized securities exchanges or matrix pricing, which is a mathematical technique which is widely used in the industry to value debt securities without relying exclusively on quoted prices for the specific securities but rather by relying on the securities’ relationship to other benchmark quoted securities.
	Securities receivable- The carrying amount of securities receivable approximates their fair values.
	Loans receivable and held for sale – Fair values for loans are estimated using discounted cash flow analyses, using interest rates currently being offered for loans with similar terms to borrowers of similar credit quality. Fair values of impaired loans are estimated using discounted cash flow analyses or underlying collateral values, where applicable. The carrying amounts of loans held for sale approximate their fair values.
	Accrued interest receivable and payable – The carrying amounts of accrued interest approximate their fair values.
	FHLB stock – FHLB stock is restricted from trading purposes and thus, the carrying value approximates its fair value.
	Bank owned life insurance (BOLI) – The fair value of BOLI at September 30, 2013 and December 31, 2012 approximated the cash surrender value of the policies at those dates.
	Interest rate cap and interest rate swap contracts – Fair values of interest rate cap and interest rate swap contracts are based on dealer quotes.
	Deposits – The fair values disclosed for demand deposits are, by definition, equal to the amount payable on demand at the reporting date. Fair values for certificates of deposit are estimated using a discounted cash flow calculation that applies current market interest rates to a schedule of aggregated expected monthly maturities.
	Borrowed funds and junior subordinated notes – For variable rate borrowings, fair values are based on carrying values. For fixed rate borrowings, fair values are based on the discounted value of contractual cash flows and on the Company’s current incremental borrowing rates for similar types of borrowing arrangements. Fair values of structured borrowings are based on dealer quotes.
	Advance payments by borrowers for taxes and insurance- The fair value of the advance payments by borrowers for taxes and insurance approximated the carrying value of those commitments at those dates.
	The following tables set forth the carrying amount and fair value of the Company’s financial instruments included in the consolidated statement of financial condition as of September 30, 2013 and December 31, 2012:
	September 30, 2013
	(Dollar amounts in thousands)		Carrying		Quoted Prices		Significant		Significant		Total Fair
			amount		in Active		Other		Unobservable		Value
					Markets for		Observable		Inputs
					Identical Assets		Inputs		(Level III)
					or Liabilities		(Level II)
					(Level I)
	Financial Assets:
	Cash and Cash Equivalents		$	19,839	$	19,839	$	—	$	—	$	19,839
	Securities			1,067,401		1,729		1,028,904		36,768		1,067,401
	Securities Receivable			1,319		1,319		—		—		1,319
	Loans receivable and held for sale			683,704		—		—		699,504		699,504
	Accrued Interest Receivable			7,582		7,582		—		—		7,582
	FHLB Stock			13,655		13,655		—		—		13,655
	Bank owned life insurance			30,460		30,460		—		—		30,460
	Interest rate cap contracts			638		—		638		—		638
	Financial Liabilities:
	Deposits			1,232,434		593,365		—		646,249		1,239,614
	Borrowed funds			422,270		—		173,535		264,947		438,482
	Junior subordinated notes			36,083		—		24,176		—		24,176
	Advance payments by borrowers for taxes and insurance			1,503		1,503		—		—		1,503
	Accrued interest payable			2,654		2,654		—		—		2,654
	Interest rate swap contracts			4,258		—		4,258		—		4,258
	December 31, 2012
	(Dollar amounts in thousands)		Carrying		Quoted Prices		Significant		Significant		Total Fair
			amount		in Active		Other		Unobservable		Value
					Markets for		Observable		Inputs
					Identical Assets		Inputs		(Level III)
					or Liabilities		(Level II)
					(Level I)
	Financial Assets:
	Cash and Cash Equivalents		$	15,064	$	15,064	$	—	$	—	$	15,064
	Securities			1,110,776		1,818		1,072,779		36,179		1,110,776
	Securities Receivable			1,277		1,277		—		—		1,277
	Loans receivable and held for sale			672,086		—		—		702,206		702,206
	Accrued Interest Receivable			8,068		8,068		—		—		8,068
	FHLB Stock			15,077		15,077		—		—		15,077
	Bank owned life insurance			30,025		30,025		—		—		30,025
	Interest rate cap contracts			90		—		90		—		90
	Financial Liabilities:
	Deposits			1,178,057		546,298		—		641,430		1,187,728
	Borrowed funds			484,556		—		260,333		249,550		509,883
	Junior subordinated notes			46,393		—		25,001		—		25,001
	Advance payments by borrowers for taxes and insurance			2,619		2,619		—		—		2,619
	Accrued interest payable			1,344		1,344		—		—		1,344
	Interest rate swap contracts			5,743		—		5,743		—		5,743

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2013

Accounting Policies [Abstract]

'

Principles of Consolidation

'

Principles of Consolidation

ESB Financial Corporation (the Company) is a publicly traded Pennsylvania thrift holding company. The consolidated financial statements include the accounts of the Company and its direct and indirect wholly-owned subsidiaries, which are ESB Bank (ESB or the Bank), THF, Inc. (THF), ESB Financial Services, Inc. (EFS) and AMSCO, Inc. (AMSCO). ESB is a Pennsylvania chartered, Federal Deposit Insurance Corporation (FDIC) insured stock savings bank.

AMSCO is engaged in real estate development and construction of 1-4 family residential units independently or in conjunction with its joint ventures. AMSCO is currently involved in eight real estate joint ventures, all of which are owned 51% or greater by AMSCO. The Bank has provided all development and construction financing. These joint ventures have been included in the consolidated financial statements and reflected within the consolidated statements of financial condition as real estate held for investment and related operating income and expenses are reflected within other non-interest income or expense. The Bank’s loans to AMSCO and related interest have been eliminated in consolidation.

In addition to the elimination of the loans and interest to the joint ventures described above, all other significant intercompany transactions and balances have been eliminated in consolidation.

Basis of Presentation

'

Basis of Presentation

The accompanying unaudited consolidated financial statements for the interim periods include all adjustments, consisting only of normal recurring accruals, which are necessary, in the opinion of management, to fairly reflect the Company’s financial position and results of operations. Additionally, these consolidated financial statements for the interim periods have been prepared in accordance with instructions for the Securities and Exchange Commission’s Form 10-Q and therefore do not include all information or footnotes necessary for a complete presentation of financial condition, results of operations and cash flows in conformity with U.S. generally accepted accounting principles (GAAP). For further information, refer to the audited consolidated financial statements and footnotes thereto for the year ended December 31, 2012, as contained in the Company’s 2012 Annual Report to Stockholders.

The results of operations for the three and nine month periods ended September 30, 2013 are not necessarily indicative of the results that may be expected for the entire year. Certain amounts previously reported have been reclassified to conform to the current periods’ reporting format, such reclassifications did not have an effect on stockholders’ equity or net income.

The accounting principles followed by the Company and the methods of applying these principles conform with GAAP and with general practice within the banking industry. In preparing the consolidated financial statements management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the Statement of Financial Condition date and revenues and expenses for the period. Actual results could differ significantly from those estimates.

Operating Segments

'

Operating Segments

An operating segment is defined as a component of an enterprise that engages in business activities that generate revenue and incur expense, the operating results of which are reviewed by management. At September 30, 2013, the Company was doing business through 23 full service banking branches, one loan production office and through its various other subsidiaries. Loans and deposits are primarily generated from the areas where banking branches are located. The Company derives its income predominantly from interest on loans and securities and to a lesser extent, non-interest income. The Company’s principal expenses are interest paid on deposits and borrowed funds and normal operating costs. The Company’s operations are principally in the banking industry. Consistent with internal reporting, the Company’s operations are reported in one operating segment, which is community banking.

Stock Based Compensation

'

Stock Based Compensation

During the three and nine months ended September 30, 2013, the Company recorded approximately $186,000 and $537,000, respectively, in compensation expense and a tax benefit of $12,000 and $49,000, respectively, related to our share-based compensation awards that are expected to vest in 2013. As of September 30, 2013, there was approximately $727,000 of unrecognized compensation cost related to unvested share-based compensation awards granted. That cost is expected to be recognized over the next four years.

During the three and nine months ended September 30, 2012, the Company recorded approximately $116,000 and $327,000, respectively, in compensation expense and a tax benefit of $6,000 and $23,000, respectively, related to our share-based compensation awards that vested in 2012.

Cash flows from the tax benefits resulting from tax deductions in excess of the compensation cost recognized for stock-based awards (excess tax benefits) are classified as financing cash flows.

Financial Instruments

'

Financial Instruments

As part of its overall interest rate risk management activities, the Company utilizes derivative instruments to manage its exposure to various types of interest rate risk. Interest rate swaps and interest rate caps are the primary instruments the Company uses for interest rate risk management. Derivative instruments are recorded at fair value as either part of prepaid expenses and other assets or accrued expenses and other liabilities on the consolidated statements of financial condition. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative and the resulting designation. Derivatives used to hedge the exposure to changes in the fair value of an asset, liability, or firm commitment attributable to a particular risk, such as interest rate risk, are considered fair value hedges. Derivatives used to hedge the exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges.

The Company formally documents the relationship between the hedging instruments and hedged items, as well as the risk management objective and strategy, before undertaking an accounting hedge. To qualify for hedge accounting, the derivatives and related hedged items must be designated as a hedge at inception of the hedge relationship. For accounting hedge relationships, we formally assess, both at the inception of the hedge and on an ongoing basis, if the derivatives are highly effective in offsetting designated changes in the fair value or cash flows of the hedged item. If it is determined that the derivative instrument is not highly effective, hedge accounting is discontinued.

For derivatives designated as fair value hedges, changes in the fair value of the derivative and the hedged item related to the hedged risk are recognized in earnings. To the extent the change in fair value of the derivative does not offset the change in fair value of the hedged item, the difference or ineffectiveness is reflected in earnings in the same financial statement category as the hedged item.

For derivatives designated as cash flow hedges, the effective portion of changes in the fair value of the derivative is initially reported in other comprehensive income (OCI) and subsequently reclassified to earnings when the hedged transaction affects earnings and the ineffective portion of changes in the fair value of the derivative is recognized directly in earnings. The Company assesses the effectiveness of each hedging relationship by comparing the changes in fair value or cash flows of the derivative hedging instrument with the changes in fair value or cash flows of the designated hedged item or transaction. For derivatives not designated as hedges, changes in fair value are recognized in earnings.

At September 30, 2013, there were twenty one interest rate cap contracts outstanding with notional amounts totaling $220.0 million. These derivative instruments are not hedged and therefore adjustments to fair value are recorded in current earnings.

The Company entered into two interest rate swap contracts to manage its exposure to interest rate risk. These interest rate swap transactions involved the exchange of the Company’s interest payment on $35.0 million in junior subordinated notes which became floating rate notes in 2011 for a fixed rate interest payment without the exchange of the underlying principal amount. Entering into interest rate derivatives potentially exposes the Company to the risk of counterparties’ failure to fulfill their legal obligations including, but not limited to, potential amounts due or payable under each derivative contract. Notional principal amounts are often used to express the volume of these transactions, but the amounts potentially subject to credit risk are much smaller. Management utilizes the Change in Variable Cash Flows Method to measure hedge ineffectiveness. To the extent that the cumulative change in anticipated cash flows from the hedging derivative offsets from 80% to 125% of the cumulative change in anticipated cash flows from the hedged exposure, the hedged is deemed effective. As of September 30, 2013, the interest rate swaps were deemed to be effective, therefore no amounts were charged to current earnings. The Company also does not expect to reclassify any hedge related amounts from OCI to earnings over the next twelve months.

The fixed rate interest rate swap contract outstanding at September 30, 2013 is being utilized to hedge $35.0 million in floating rate junior subordinated notes. Below is a summary of the interest rate swap contract and the terms at September 30, 2013:

Notional

Effective

Pay

Receive

Maturity

Unrealized

(Dollars in thousands)

Amount

Date

Rate

Rate (*)

Date

Gain

Loss

Cash Flow Hedge

$

20,000

2/10/11

4.18

%

0.28

%

2/10/18

$

—

$

862

Cash Flow Hedge

15,000

2/10/11

3.91

%

0.28

%

2/10/18

—

586

$

35,000

$

—

$

1,448

*

Variable receive rate based upon contract rates in effect at September 30, 2013.

Recent Accounting and Regulatory Pronouncements

'

Recent Accounting and Regulatory Pronouncements

In February 2013, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2013-02, Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income. The standard requires that companies present either in a single note or parenthetically on the face of the financial statements, the effect of significant amounts reclassified from each component of accumulated other comprehensive income based on its source and the income statement line items affected by the reclassification. The new requirements will take effect for public companies in fiscal years, and interim periods within those years, beginning after December 15, 2012. The Company adopted this standard on January 1, 2013. The effect of adopting this standard increased our disclosure surrounding reclassification items out of accumulated other comprehensive income.

In February 2013, the FASB issued ASU 2013-04, Obligations Resulting from Joint and Several Liability Arrangements for Which the Total Amount of the Obligation is Fixed at the Reporting Date. The ASU requires the measurement of obligations resulting from joint and several liability arrangements for which the total amount of the obligation is fixed at the reporting date as the sum of the amount the reporting entity agreed to pay on the basis of its arrangement with its co-obligors as well as any additional amount that the entity expects to pay on behalf of its co-obligors. The new standard is effective retrospectively for fiscal years and interim periods within those years, beginning after December 15, 2013, and early adoption is permitted. This ASU is not expected to have a significant impact on the Company’s financial statements.

In April 2013, the FASB ASU 2013-07, Presentation of Financial Statements (Topic 205): Liquidation Basis of Accounting. The amendments in this Update are being issued to clarify when an entity should apply the liquidation basis of accounting. In addition, the guidance provides principles for the recognition and measurement of assets and liabilities and requirements for financial statements prepared using the liquidation basis of accounting. The amendments require an entity to prepare its financial statements using the liquidation basis of accounting when liquidation is imminent. Liquidation is imminent when the likelihood is remote that the entity will return from liquidation and either (a) a plan for liquidation is approved by the person or persons with the authority to make such a plan effective and the likelihood is remote that the execution of the plan will be blocked by other parties or (b) a plan for liquidation is being imposed by other forces (for example, involuntary bankruptcy). If a plan for liquidation was specified in the entity’s governing documents from the entity’s inception (for example, limited-life entities), the entity should apply the liquidation basis of accounting only if the approved plan for liquidation differs from the plan for liquidation that was specified at the entity’s inception. The amendments are effective for entities that determine liquidation is imminent during annual reporting periods beginning after December 15, 2013, and interim reporting periods therein. Entities should apply the requirements prospectively from the day that liquidation becomes imminent. Early adoption is permitted. Entities that use the liquidation basis of accounting as of the effective date in accordance with other Topics (for example, terminating employee benefit plans) are not required to apply the amendments. Instead, those entities should continue to apply the guidance in those other Topics until they have completed liquidation. This ASU is not expected to have a significant impact on the Company’s financial statements.

In June 2013, the FASB issued ASU 2013-08, Financial Services – Investment Companies (Topic 946): Amendments to the Scope, Measurement, and Disclosure Requirements. The amendments in this Update affect the scope, measurement, and disclosure requirements for investment companies under U.S. GAAP. The amendments do all of the following: 1. Change the approach to the investment company assessment in Topic 946, clarify the characteristics of an investment company, and provide comprehensive guidance for assessing whether an entity is an investment Company. 2. Require an investment company to measure noncontrolling ownership interests in other investment companies at fair value rather than using the equity method of accounting. 3. Require the following additional disclosures: (a) the fact that the entity is an investment company and is applying the guidance in Topic 946, (b) information about changes, if any, in an entity’s status as an investment company, and (c) information about financial support provided or contractually required to be provided by an investment company to any of its investees. The amendments in this Update are effective for an entity’s interim and annual reporting periods in fiscal years that begin after December 15, 2013. Earlier application is prohibited. This ASU is not expected to have a significant impact on the Company’s financial statements.

In July 2013, the FASB ASU 2013-09, Fair Value Measurement (Topic 820): Deferral of the Effective Date of Certain Disclosures for Nonpublic Employee Benefit Plans in Update No. 2011-04. The amendments in this Update apply to certain quantitative disclosure requirements for an employee benefit plan, other than those plans that are subject to the Securities and Exchange Commission’s filing requirements (hereafter “nonpublic employee benefit plan”), that holds investments in its plan sponsor’s own nonpublic entity equity securities, including equity securities of its plan sponsor’s nonpublic affiliated entities and that are within the scope of the disclosure requirements contained in FASB Accounting Standards Update No. 2011-04, Fair Value Measurement (Topic 820): Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRSs. The amendments in this Update defer indefinitely the effective date of certain required disclosures in Update 2011-04 (Topic 820) of quantitative information about the significant unobservable inputs used in Level 3 fair value measurements for investments held by a nonpublic employee benefit plan in its plan sponsor’s own nonpublic entity equity securities, including equity securities of its plan sponsor’s nonpublic affiliated entities. The amendments in this Update do not defer the effective date for those certain quantitative disclosures for other nonpublic entity equity securities held in the nonpublic employee benefit plan or any qualitative disclosures. The deferral in this amendment is effective upon issuance for financial statements that have not been issued. This ASU did not have a significant impact on the Company’s financial statements.

In July 2013, the FASB issued ASU 2013-10, Derivatives and Hedging (Topic 815): Inclusion of the Fed Funds Effective Swap Rate (or Overnight Index Swap Rate) as a Benchmark Interest Rate for Hedge Accounting Purposes. The amendments in this Update permit the Fed Funds Effective Swap Rate (OIS) to be used as a U.S. benchmark interest rate for hedge accounting purposes under Topic 815, in addition to UST and LIBOR. The amendments also remove the restriction on using different benchmark rates for similar hedges. The amendments are effective prospectively for qualifying new or redesignated hedging relationships entered into on or after July 17, 2013. This ASU did not have a significant impact on the Company’s financial statements.

In July 2013, the FASB issued ASU 2013-11, Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists. This Update applies to all entities that have unrecognized tax benefits when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists at the reporting date. An unrecognized tax benefit, or a portion of an unrecognized tax benefit, should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward, except as follows. To the extent a net operating loss carryforward, a similar tax loss, or a tax credit carryforward is not available at the reporting date under the tax law of the applicable jurisdiction to settle any additional income taxes that would result from the disallowance of a tax position or the tax law of the applicable jurisdiction does not require the entity to use, and the entity does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and should not be combined with deferred tax assets. The assessment of whether a deferred tax asset is available is based on the unrecognized tax benefit and deferred tax asset that exist at the reporting date and should be made presuming disallowance of the tax position at the reporting date. The amendments in this Update are effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. For nonpublic entities, the amendments are effective for fiscal years, and interim periods within those years, beginning after December 15, 2014. Early adoption is permitted. The amendments should be applied prospectively to all unrecognized tax benefits that exist at the effective date. Retrospective application is permitted. This ASU is not expected to have a significant impact on the Company’s financial statements.

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 2013
Accounting Policies [Abstract]	'
Summary of Interest Rate Swap Contract	'
	The fixed rate interest rate swap contract outstanding at September 30, 2013 is being utilized to hedge $35.0 million in floating rate junior subordinated notes. Below is a summary of the interest rate swap contract and the terms at September 30, 2013:
			Notional		Effective		Pay			Receive			Maturity		Unrealized
	(Dollars in thousands)		Amount		Date		Rate			Rate (*)			Date		Gain		Loss
	Cash Flow Hedge		$	20,000		2/10/11		4.18	%		0.28	%		2/10/18	$	—	$	862
	Cash Flow Hedge			15,000		2/10/11		3.91	%		0.28	%		2/10/18		—		586
			$	35,000											$	—	$	1,448
	*	Variable receive rate based upon contract rates in effect at September 30, 2013.

Securities_Available_for_Sale_

Securities Available for Sale (Tables)	9 Months Ended
	Sep. 30, 2013
Investments Debt And Equity Securities [Abstract]	'
Schedule of Securities Available for Sale Portfolio	'
	The Company’s securities available for sale portfolio is summarized as follows:
	(Dollar amounts in thousands)
		Amortized			Unrealized		Unrealized			Fair value
		cost			gains		losses
	September 30, 2013:
	Trust preferred securities	$	45,898		$	245	$	(7,655	)	$	38,488
	Municipal securities		176,076			6,649		(3,288	)		179,437
	Equity securities- financial institutions		953			776		—			1,729
	Corporate bonds		209,153			6,044		(477	)		214,720
	Mortgage-backed securities
	U.S. sponsored entities		615,116			20,921		(4,966	)		631,071
	Private label		1,934			24		(2	)		1,956
	Subtotal mortgage-backed securities		617,050			20,945		(4,968	)		633,027
	Total securities	$	1,049,130		$	34,659	$	(16,388	)	$	1,067,401
	December 31, 2012:
	Trust preferred securities	$	45,894		$	367	$	(8,234	)	$	38,027
	Municipal securities		177,414			13,717		(244	)		190,887
	Equity securities- financial institutions		1,142			676		—			1,818
	Corporate bonds		219,700			7,186		(1,091	)		225,795
	Mortgage-backed securities
	U.S. sponsored entities		617,158			33,021		(246	)		649,933
	Private label		4,139			177		—			4,316
	Subtotal mortgage-backed securities		621,297			33,198		(246	)		654,249
	Total securities	$	1,065,447		$	55,144	$	(9,815	)	$	1,110,776
Schedule of Investments Gross Unrealized Losses and Fair Value	'
	The following table shows the Company’s investments gross unrealized losses and fair value aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at September 30, 2013:
	As of September 30, 2013
	(Dollar amounts in thousands)
		Less than 12 Months								12 Months or more						Total
		# of			Fair Value		Unrealized			# of		Fair Value		Unrealized		# of		Fair Value		Unrealized
		Securities					losses			Securities				losses		Securities				losses
	Trust preferred securities		—		$	—	$	—			9	$	36,768	$	7,655		9	$	36,768	$	7,655
	Municipal securities		33			27,172		2,894			2		2,853		394		35		30,025		3,288
	Corporate bonds		5			13,894		160			4		15,432		317		9		29,326		477
	Mortgage-backed securities
	U.S. sponsored entities		52			176,057		4,966			—		—		—		52		176,057		4,966
	Private label		1			542		2			—		—		—		1		542		2
	Subtotal mortgage-backed securities		53			176,599		4,968			—		—		—		53		176,599		4,968
	Total		91		$	217,665	$	8,022			15	$	55,053	$	8,366		106	$	272,718	$	16,388
	The following table shows the Company’s investments gross unrealized losses and fair value aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at December 31, 2012:
	As of December 31, 2012
	(Dollar amounts in thousands)
		Less than 12 Months								12 Months or more						Total
		# of			Fair Value		Unrealized			# of		Fair Value		Unrealized		# of		Fair Value		Unrealized
		Securities					losses			Securities				losses		Securities				losses
	Trust preferred securities		—		$	—	$	—			9	$	36,179	$	8,234		9	$	36,179	$	8,234
	Municipal securities		5			4,179		58			2		3,059		186		7		7,238		244
	Corporate bonds		5			15,604		110			5		20,020		981		10		35,624		1,091
	Mortgage-backed securities
	U.S. sponsored entities		8			28,246		246			—		—		—		8		28,246		246
	Total		18		$	48,029	$	414			16	$	59,258	$	9,401		34	$	107,287	$	9,815
Scheduled Maturities of Securities	'
	The following table summarizes scheduled maturities of the Company’s securities as of September 30, 2013 and December 31, 2012 excluding equity securities which have no maturity dates:
	As of September 30, 2013
	(Dollar amounts in thousands)
		Available for sale
		Weighted			Amortized		Fair
		Average Yield			cost		value
	Due in one year or less		2.83	%	$	33,273	$	33,721
	Due from one year to five years		3.12	%		173,386		179,923
	Due from five to ten years		3.26	%		106,118		108,038
	Due after ten years		3.08	%		735,400		743,990
			3.1	%	$	1,048,177	$	1,065,672
	As of December 31, 2012
	(Dollar amounts in thousands)
		Available for sale
		Weighted			Amortized		Fair
		Average Yield			cost		value
	Due in one year or less		3.8	%	$	19,137	$	19,411
	Due from one year to five years		3.05	%		187,595		195,182
	Due from five to ten years		3.27	%		108,288		111,879
	Due after ten years		3.3	%		749,285		782,486
			3.26	%	$	1,064,305	$	1,108,958

Loans_Receivable_Tables

Loans Receivable (Tables)	9 Months Ended
	Sep. 30, 2013
Receivables [Abstract]	'
Schedule of Loans Receivable	'
	The Company’s loans receivable as of the respective dates are summarized as follows:
	(Dollar amounts In thousands)
		September 30,			December 31,
		2013			2012
	Mortgage loans:
	Residential real estate
	Single family	$	335,419		$	326,005
	Multi family		38,291			33,472
	Construction		46,323			46,418
	Total residential real estate		420,033			405,895
	Commercial real estate
	Commercial		79,299			81,077
	Construction		16,816			15,878
	Total commercial real estate		96,115			96,955
	Subtotal mortgage loans		516,148			502,850
	Other loans:
	Consumer loans
	Home equity loans		82,193			80,418
	Dealer auto and RV loans		48,003			46,571
	Other loans		7,097			7,896
	Total consumer loans		137,293			134,885
	Commercial business		51,148			54,445
	Subtotal other loans		188,441			189,330
	Total loans receivable		704,589			692,180
	Less:
	Allowance for loan losses		6,713			6,709
	Deferred loan fees and net discounts		(2,133	)		(1,862	)
	Loans in process		16,305			15,247
	Subtotal		20,885			20,094
	Net loans receivable	$	683,704		$	672,086
Changes in Allowance for Loan Losses and Recorded Investment in Loans	'
	The following tables present by portfolio segment, the changes in the allowance for loan losses for the three and nine month periods ended September 30, 2013 and 2012:
	Three months ended September 30, 2013
	(Dollar amounts in thousands)
					Commercial
		Commercial			Real Estate			Consumer		Residential			Unallocated			Total
	Allowance for loan losses:
	Beginning balance	$	543		$	2,102		$	1,062	$	2,425		$	596		$	6,728
	Charge-offs		17			—			93		13			—			123
	Recoveries		—			—			33		—			—			33
	Provision		18			63			34		(40	)		—			75
	Reallocations		(44	)		(107	)		63		233			(145	)		—
	Ending Balance	$	500		$	2,058		$	1,099	$	2,605		$	451		$	6,713
	Three months ended September 30, 2012
	(Dollar amounts in thousands)
					Commercial
		Commercial			Real Estate			Consumer		Residential			Unallocated			Total
	Allowance for loan losses:
	Beginning balance	$	434		$	2,299		$	1,004	$	2,519		$	485		$	6,741
	Charge-offs		32			163			206		153			—			554
	Recoveries		—			—			27		—			—			27
	Provision		94			—			174		82			—			350
	Reallocations		—			(62	)		—		97			(35	)		—
	Ending Balance	$	496		$	2,074		$	999	$	2,545		$	450		$	6,564
	Nine months ended September 30, 2013
	(Dollar amounts in thousands)
					Commercial
		Commercial			Real Estate			Consumer		Residential			Unallocated			Total
	Allowance for loan losses:
	Beginning balance	$	550		$	2,075		$	1,031	$	2,541		$	512		$	6,709
	Charge-offs		17			7			346		24			2			396
	Recoveries		—			—			100		—			—			100
	Provision		38			138			72		52			—			300
	Reallocations		(71	)		(148	)		242		36			(59	)		—
	Ending Balance	$	500		$	2,058		$	1,099	$	2,605		$	451		$	6,713
	Nine months ended September 30, 2012
	(Dollar amounts in thousands)
					Commercial
		Commercial			Real Estate			Consumer		Residential			Unallocated			Total
	Allowance for loan losses:
	Beginning balance	$	384		$	2,442		$	1,045	$	2,115		$	551		$	6,537
	Charge-offs		32			163			445		277			—			917
	Recoveries		—			—			77		17			—			94
	Provision		144			—			322		384			—			850
	Reallocations		—			(205	)		—		306			(101	)		—
	Ending Balance	$	496		$	2,074		$	999	$	2,545		$	450		$	6,564
	The following tables present by portfolio segment, the recorded investment in loans at September 30, 2013 and December 31, 2012:
	As of September 30, 2013
	(Dollar amounts in thousands)
					Commercial
		Commercial			Real Estate			Consumer		Residential			Unallocated			Total
	Allowance for loan losses:
	Ending balance: individually evaluated for impairment	$	—		$	1,063		$	49	$	—		$	—		$	1,112
	Ending balance: collectively evaluated for impairment	$	500		$	995		$	1,050	$	2,605		$	451		$	5,601
	Loans Receivable:
	Ending Balance	$	51,148		$	96,115		$	137,293	$	420,033		$	—		$	704,589
	Ending balance: individually evaluated for impairment	$	—		$	14,688		$	394	$	2,207		$	—		$	17,289
	Ending balance: collectively evaluated for impairment	$	51,148		$	81,427		$	136,899	$	417,826		$	—		$	687,300
	As of December 31, 2012
	(Dollar amounts in thousands)
					Commercial
		Commercial			Real Estate			Consumer		Residential			Unallocated			Total
	Allowance for loan losses:
	Ending balance: individually evaluated for impairment	$	—		$	1,110		$	54	$	—		$	—		$	1,164
Ending balance: collectively evaluated for impairment	$	550		$	965		$	977	$	2,541		$	512		$	5,545
Loans Receivable:
Ending Balance	$	54,445		$	96,955		$	134,885	$	405,895		$	—		$	692,180
Ending balance: individually evaluated for impairment	$	—		$	13,414		$	327	$	2,163		$	—		$	15,904
Ending balance: collectively evaluated for impairment	$	54,445		$	83,541		$	134,558	$	403,732		$	—		$	676,276
Schedule of Credit Exposures by Internally Assigned Grades	'
	As of September 30, 2013
	(Dollar amounts in thousands)
		Residential			Residential			Commercial		Commercial			Commercial
		Real Estate			Real Estate			Real Estate		Real Estate
		Multi - family			Construction			Commercial		Construction
	Pass	$	38,291		$	42,563		$	64,903	$	16,816		$	51,071
	Special Mention		—			681			1,369		—			22
	Substandard		—			3,079			13,027		—			55
	Doubtful		—			—			—		—			—
	Loss		—			—			—		—			—
	Ending Balance	$	38,291		$	46,323		$	79,299	$	16,816		$	51,148
	As of December 31, 2012
	(Dollar amounts in thousands)
		Residential			Residential			Commercial		Commercial			Commercial
		Real Estate			Real Estate			Real Estate		Real Estate
		Multi - family			Construction			Commercial		Construction
	Pass	$	33,472		$	41,138		$	65,696	$	15,878		$	53,883
	Special Mention		—			4,477			1,334		—			527
	Substandard		—			803			14,047		—			35
	Doubtful		—			—			—		—			—
	Loss		—			—			—		—			—
	Ending Balance	$	33,472		$	46,418		$	81,077	$	15,878		$	54,445
Performing and Nonperforming Single Family Residential and Consumer Loans Based on Payment Activity	'
	The following tables present performing and nonperforming single family residential and consumer loans based on payment activity as of September 30, 2013 and December 31, 2012. Payment activity is reviewed by management on a monthly basis to determine how loans are performing. Loans are considered to be nonperforming when they become 90 days delinquent.
	As of September 30, 2013
	(Dollar amounts in thousands)
		Residential Real Estate			Consumer			Dealer		Other
		Single Family			Home Equity			Auto and RV		Consumer
	Performing	$	331,904		$	81,892		$	47,832	$	7,017
	Nonperforming		3,515			301			171		80
	Total	$	335,419		$	82,193		$	48,003	$	7,097
	As of December 31, 2012
	(Dollar amounts in thousands)
		Residential Real Estate			Consumer			Dealer		Other
		Single Family			Home Equity			Auto and RV		Consumer
	Performing	$	322,662		$	80,124		$	46,450	$	7,787
	Nonperforming		3,343			294			121		109
	Total	$	326,005		$	80,418		$	46,571	$	7,896
Aging Analysis of Investment of Past Due Loans Receivable	'
	The following tables are an aging analysis of the investment of past due loans receivable as of September 30, 2013 and December 31, 2012:
	(Dollar amounts in thousands)
	As of September 30, 2013
		30-59 Days			60-89 Days			90 Days		Total Past			Current			Total Loans		Recorded
		Past Due			Past Due			Or Greater		Due						Receivable		Investment >
																		90 Days and
																		Accruing
	Residential real estate
	Single family	$	855		$	383		$	3,515	$	4,753		$	330,666		$	335,419	$	—
	Construction		—			—			—		—			38,291			46,323		—
	Multi-family		—			—			—		—			46,323			38,291		—
	Commercial Real Estate
	Commercial		75			397			2,631		3,103			76,196			79,299		—
	Construction		—			—			—		—			16,816			16,816		—
	Consumer
	Consumer - home equity		129			—			237		366			81,827			82,193		—
	Consumer - dealer auto and RV		433			172			169		774			47,229			48,003		—
	Consumer - other		17			4			80		101			6,996			7,097		—
	Commercial		1			—			33		34			51,114			51,148		—
	Total	$	1,510		$	956		$	6,665	$	9,131		$	695,458		$	704,589	$	—
	(Dollar amounts in thousands)
	As of December 31, 2012
		30-59 Days			60-89 Days			90 Days		Total Past			Current			Total Loans		Recorded
		Past Due			Past Due			Or Greater		Due						Receivable		Investment >
																		90 Days and
																		Accruing
	Residential real estate
	Single family	$	887		$	420		$	3,343	$	4,650		$	321,355		$	326,005	$	—
	Construction		—			—			—		—			46,418			46,418		—
	Multi-family		—			—			—		—			33,472			33,472		—
	Commercial Real Estate
	Commercial		246			598			3,211		4,055			77,022			81,077		—
	Construction		—			—			—		—			15,878			15,878		—
	Consumer
	Consumer - home equity		219			—			223		442			79,976			80,418		—
	Consumer - dealer auto and RV		771			230			104		1,105			45,466			46,571		—
	Consumer - other		70			12			109		191			7,705			7,896		—
	Commercial		—			2			35		37			54,408			54,445		—
	Total	$	2,193		$	1,262		$	7,025	$	10,480		$	681,700		$	692,180	$	—
Recorded Investment and Unpaid Principal Balances for Impaired Loans Receivable	'
	The following tables summarize impaired loans:
	Impaired Loans
	As of September 30, 2013 and December 31, 2012
	(Dollar amounts in thousands)
		30-Sep-13								31-Dec-12
		Recorded			Unpaid			Related		Recorded			Unpaid			Related
		Investment			Principal			Allowance		Investment			Principal			Allowance
					Balance								Balance
	With no related allowance recorded:
	Commercial Real Estate	$	5,532		$	5,639		$	—	$	5,433		$	5,540		$	—
	Residential single family		1,357			1,357			—		1,360			1,360
	Residential construction loans		850			850			—		803			803
	Consumer loans
	Home Equity		211			236			—		130			130			—
	Dealer auto and RV		8			8			—		14			14			—
	With an allowance recorded:
	Commercial Real Estate		9,156			9,319			1,063		7,981			8,144			1,110
	Consumer Loans:
	Home Equity		172			150			46		179			179			50
	Dealer auto and RV		3			3			3		4			4			4
	Total:
	Commercial Real Estate		14,688			14,958			1,063		13,414			13,684			1,110
	Consumer		394			397			49		327			327			54
	Residential single family		1,357			1,357			—		1,360			1,360			—
	Residential construction		850			850			—		803			803			—
	Total	$	17,289		$	17,562		$	1,112	$	15,904		$	16,174		$	1,164
Average Recorded Investment and Interest Income Recognized on Loans	'
	(Dollar amounts in thousands)
		Three months ended						Three months ended
		September 30, 2013						September 30, 2012
		Average			Interest			Average		Interest
		Recorded			Income			Recorded		Income
		Investment			Recognized			Investment		Recognized
	With no related allowance recorded:
	Commercial Real Estate:
	Commercial Real Estate	$	5,562		$	57		$	5,451	$	58
	Residential loans		1,358			3			1,361		2
	Residential construction loans		885			7			102		10
	Consumer Loans:
	Home equity		198			4			91		10
	Dealer auto and RV		9			—			—		—
	With an allowance recorded:
	Commercial Real Estate:
	Commercial Real Estate		9,176			116			8,248		105
	Consumer Loans:
	Home equity		172			3			152		1
	Dealer auto and RV		3			—			—		—
	Commercial business loans		—			—			37		2
	Total:
	Commercial Real Estate	$	14,738		$	173		$	13,699	$	163
	Consumer		382			7			243		11
	Residential		1,358			3			1,361		2
	Residential construction loans		885			7			102		10
	Commercial		—			—			37		2
	(Dollar amounts in thousands)
		Nine months ended						Nine months ended
		September 30, 2013						September 30, 2012
		Average			Interest			Average		Interest
		Recorded			Income			Recorded		Income
		Investment			Recognized			Investment		Recognized
	With no related allowance recorded:
	Commercial Real Estate:
	Commercial Real Estate	$	5,325		$	177		$	5,488	$	170
	Residential loans		1,359			7			1,362		7
	Residential construction loans		894			25			421		32
	Consumer Loans:
	Home equity		179			10			43		10
	Dealer auto and RV		10			2			—		—
	With an allowance recorded:
	Commercial Real Estate:
	Commercial Real Estate		8,512			374			8,353		319
	Consumer Loans:
	Home equity		174			8			153		6
	Dealer auto and RV		4			—			—		—
	Commercial business loans		—			—			41		2
	Total:
	Commercial Real Estate	$	13,837		$	551		$	13,841	$	489
	Consumer		367			20			196		16
	Residential		1,359			7			1,362		7
	Residential construction loans		894			25			421		32
	Commercial		—			—			41		2
Schedule of Loans Receivable on Nonaccrual Status	'
	On the following table are the loans receivable and TDR’s on nonaccrual status as of September 30, 2013 and December 31, 2012. The balances are presented by class of loans:
	(Dollar amounts in thousands)
		September 30,			December 31,
		2013			2012
	Commercial	$	33		$	35
	Commercial Real Estate		2,631			3,432
	Consumer
	Consumer - Home Equity		237			293
	Consumer - Dealer auto and RV		168			121
	Consumer - Other		80			109
	Residential		3,516			3,403
	Total	$	6,665		$	7,393
Summary of Information Relating to Troubled Debt Restructuring by Class of Loans	'
	The following table includes the recorded investment and number of modifications for modified loans for the three and nine months ended September 30, 2013 and 2012. The Company reports the recorded investment in the loans prior to a modification and also the recorded investment in the loans after the loans were restructured.
	(Dollar amounts in thousands)
		For the Three Months ended
		September 30, 2013
					Pre-Modification			Post-Modification Recorded Investment
					Outstanding
		Number of			Recorded			Maturity Date		Deferral of			Other			Total
		Contracts			Investment			Extension		Principal Payments
	Troubled Debt Restructurings
	Consumer
	Home equity		1		$	25		$	25		—		$	—		$	25
	Troubled Debt Restructurings		1		$	25		$	25	$	—		$	—		$	25
	(Dollar amounts in thousands)
		For the Three Months ended
		September 30, 2012
					Pre-Modification			Post-Modification Recorded Investment
					Outstanding
		Number of			Recorded			Maturity Date		Deferral of			Other			Total
		Contracts			Investment			Extension		Principal Payments
	Troubled Debt Restructurings
	Consumer
	Home equity		6		$	139		$	139	$	—		$	—		$	139
	Troubled Debt Restructurings		6		$	139		$	139	$	—		$	—		$	139
	(Dollar amounts in thousands)
		For the Nine Months ended
		September 30, 2013
					Pre-Modification			Post-Modification Recorded Investment
					Outstanding
		Number of			Recorded			Maturity Date		Deferral of			Other			Total
		Contracts			Investment			Extension		Principal Payments
	Troubled Debt Restructurings
	Commercial real estate		12		$	2,331		$	26	$	—		$	2,305		$	2,331
	Consumer
	Home equity		7			116			116		—			—			116
	Troubled Debt Restructurings		19		$	2,447		$	142	$	—		$	2,305		$	2,447
	(Dollar amounts in thousands)
		For the Nine Months ended
		September 30, 2012
					Pre-Modification			Post-Modification Recorded Investment
					Outstanding
		Number of			Recorded			Maturity Date		Deferral of			Other			Total
		Contracts			Investment			Extension		Principal Payments
	Troubled Debt Restructurings
	Residential construction		3		$	947		$	947	$	—		$	—		$	947
	Commercial real estate		1			100			—		—			100			100
	Consumer
	Home equity		6			139			139		—			—			139
	Troubled Debt Restructurings		10		$	1,186		$	1,086	$	—		$	100		$	1,186

Deposits_Tables

Deposits (Tables)	9 Months Ended
	Sep. 30, 2013
Banking And Thrift [Abstract]	'
Summary of Deposits	'
	The Company’s deposits as of the respective dates are summarized as follows:
	(Dollar amounts in thousands)
		September 30, 2013					December 31, 2012
	Type of accounts	Amount		%			Amount		%
	Noninterest-bearing deposits	$	126,214		10.2	%	$	109,964		9.3	%
	NOW account deposits		248,178		20.1	%		223,736		19	%
	Money Market deposits		41,226		3.3	%		39,255		3.3	%
	Passbook account deposits		177,747		14.4	%		173,343		14.7	%
	Time deposits		639,069		52	%		631,759		53.7	%
		$	1,232,434		100	%	$	1,178,057		100	%
Schedule of Deposits of Time Deposits Maturity	'
		September 30, 2013					December 31, 2012
	Type of accounts	Amount		%			Amount		%
	Noninterest-bearing deposits	$	126,214		10.2	%	$	109,964		9.3	%
	NOW account deposits		248,178		20.1	%		223,736		19	%
	Money Market deposits		41,226		3.3	%		39,255		3.3	%
	Passbook account deposits		177,747		14.4	%		173,343		14.7	%
	Time deposits		639,069		52	%		631,759		53.7	%
		$	1,232,434		100	%	$	1,178,057		100	%
	Time deposits mature as follows:
	Within one year	$	417,278		65.2	%	$	375,862		59.6	%
	After one year through two years		124,448		19.5	%		118,333		18.7	%
	After two years through three years		59,889		9.4	%		78,492		12.4	%
	After three years through four years		19,053		3	%		36,920		5.8	%
	After four years through five years		13,216		2.1	%		17,106		2.7	%
	Thereafter		5,185		0.8	%		5,046		0.8	%
		$	639,069		100	%	$	631,759		100	%

Borrowed_Funds_Tables

Borrowed Funds (Tables)	9 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]	'
Summary of Borrowed Funds	'
	The Company’s borrowed funds as of the respective dates are summarized as follows:
	(Dollar amounts in thousands)
		September 30, 2013					December 31, 2012
		Weighted			Amount		Weighted			Amount
		average					average
		rate					rate
	FHLB advances:
	Due within 12 months		2.42	%	$	118,817		2.69	%	$	100,147
	Due beyond 12 months but within 2 years		2.14	%		29,288		2.88	%		71,392
	Due beyond 2 years but within 3 years		1.02	%		47,456		3.13	%		15,873
	Due beyond 3 years but within 4 years		1.29	%		43,426		2.15	%		8,013
	Due beyond 4 years but within 5 years		3.08	%		12,816		1.03	%		7,807
	Due beyond 5 years		—			—		3.61	%		10,000
					$	251,803				$	213,232
	Repurchase agreements:
	Due within 12 months		2.69	%	$	78,000		2.99	%	$	148,000
	Due beyond 12 months but within 2 years		4.12	%		10,000		3.07	%		40,000
	Due beyond 2 years but within 3 years		—			—		4.12	%		10,000
	Due beyond 3 years but within 4 years		4.28	%		25,000		—			—
	Due beyond 4 years but within 5 years		4.49	%		45,000		4.28	%		25,000
	Due beyond 5 years		—			—		4.49	%		45,000
					$	158,000				$	268,000
	Other borrowings:
	ESOP borrowings
	Due within 12 months		4.68	%	$	1,000		4.68	%	$	1,000
	Due beyond 12 months but within 2 years		4.68	%		1,000		4.68	%		1,000
	Due beyond 2 years but within 3 years		4.68	%		500		4.68	%		1,000
	Due beyond 3 years but within 4 years		—			—		4.68	%		250
					$	2,500				$	3,250
	Corporate borrowings
	Due within 12 months		3.75	%	$	1,000		—			—
	Due beyond 12 months but within 2 years		3.75	%		1,000		—			—
	Due beyond 2 years but within 3 years		3.75	%		1,000		—			—
	Due beyond 3 years but within 4 years		3.75	%		1,000		—			—
	Due beyond 4 years but within 5 years		3.75	%		5,967		—			—
					$	9,967				$	—
	Borrowings for joint ventures
	Due beyond 4 years but within 5 years		—		$	—		3.75	%	$	74
	Junior subordinated notes
	Due beyond 5 years		2.08	%	$	36,083		2.41	%	$	46,393

Net_Income_Per_Share_Tables

Net Income Per Share (Tables)	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Summary of Net Income Per Share	'
	The following table summarizes the Company’s net income per share:
	(Amounts, except earnings per share, in thousands)
		Three Months		Three Months
		Ended		Ended
		September 30, 2013		September 30, 2012
	Net income	$	3,971	$	3,934
	Weighted-average common shares outstanding		17,410		17,235
	Basic earnings per share	$	0.23	$	0.23
	Weighted-average common shares outstanding	$	17,410	$	17,235
	Common stock equivalents due to effect of stock options		193		154
	Total weighted-average common shares and equivalents		17,603		17,389
	Diluted earnings per share	$	0.23	$	0.22
		Nine Months		Nine Months
		Ended		Ended
		30-Sep-13		30-Sep-12
	Net income	$	11,561	$	11,400
	Weighted-average common shares outstanding		17,359		17,195
	Basic earnings per share	$	0.67	$	0.66
	Weighted-average common shares outstanding	$	17,359	$	17,195
	Common stock equivalents due to effect of stock options		171		155
	Total weighted-average common shares and equivalents		17,530		17,350
	Diluted earnings per share	$	0.66	$	0.66

Comprehensive_Income_Tables

Comprehensive Income (Tables)	9 Months Ended
	Sep. 30, 2013
Equity [Abstract]	'
Summary of Amounts Recognized in Other Comprehensive Income Loss	'
	The Company has developed the following table to present the components of accumulated OCI, at September 30, 2013:
	(Dollar amounts in thousands)
		Three Months Ended			Nine Months Ended
		September 30, 2013			September 30, 2013
		Amount			Amount			in the Statement where net
	Details about AOCI Components	Reclassifed from AOCI			Reclassifed from AOCI			income is presented
	Available-for-sale securities
	Realized gain on sale of securities	$	(58	)	$	(525	)	Net realized gain on securities
								available for sale
			20			178		Provision for income tax expense
			(38	)		(347	)	Net of tax
	Defined benefit pension plan items
	Amortization of prior service costs		26			78		See Note 1 below
	Amortization of actuarial gains/(losses)		10			30		See Note 1 below
			36			108		Total before tax
			(12	)		(37	)	Provision for income tax expense
			24			71		Net of tax
	Total reclassifications	$	(14	)	$	(276	)	Net of tax
Summary of Comprehensive Income Loss	'
	(Dollar amounts in thousands)
		Gains/(losses) on			Unrealized gains/(losses) on			Defined benefit pension
		Cash Flow Hedges			available-for-sale securities			plan items			Total
	Beginning balance	$	(3,733	)	$	29,464		$	(628	)	$	25,103
	Other comprehensive income/(loss) before reclassification		922			(17,057	)		—			(16,135	)
	Amounts reclassified from AOCI		—			(347	)		71			(276	)
	Net current period OCI		922			(17,404	)		71			(16,411	)
	Ending Balance	$	(2,811	)	$	12,060		$	(557	)	$	8,692
Schedule of Components of AOCI, Net of Tax	'
	Dollar amounts in thousands)	12/31/12
	Net unrealized gain on securities available for sale	$	29,464
	Accumulated loss on effective cash flow hedging derivatives		(3,733	)
	Net unrecognized pension cost		(628	)
	Total	$	25,103

Retirement_Plans_Tables

Retirement Plans (Tables)	9 Months Ended
	Sep. 30, 2013
Compensation And Retirement Disclosure [Abstract]	'
Schedule of Net Periodic Pension Cost for Retirement Plan	'
	The following table illustrates the components of the net periodic pension cost for the SERP and Directors Retirement Plan as of September 30, 2013 and 2012:
	(Dollar amounts in thousands)
		SERP				SERP
		Three Months		Three Months		Nine Months		Nine Months
		Ended		Ended		Ended		Ended
		September 30, 2013		September 30, 2012		September 30, 2013		September 30, 2012
	Components of net periodic pension cost
	Service cost	$	25	$	20	$	75	$	60
	Interest cost		28		31		84		93
	Amortization of unrecognized gains and losses		26		20		78		60
	Amortization of prior service cost		10		10		30		30
	Net periodic pension cost	$	89	$	81	$	267	$	243
	(Dollar amounts in thousands)
		Directors’ Retirement Plan				Directors’ Retirement Plan
		Three Months		Three Months		Nine Months		Nine Months
		Ended		Ended		Ended		Ended
		September 30, 2013		September 30, 2012		September 30, 2013		September 30, 2012
	Components of net periodic pension cost
	Service cost	$	1	$	1	$	3	$	3
	Interest cost		7		9		21		27
	Amortization of prior service cost		—		22		—		67
	Net periodic pension cost	$	8	$	32	$	24	$	97

Fair_Value_Tables

Fair Value (Tables)	9 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'
Assets and Liabilities Reported on Consolidated Statements of Financial Condition at Fair Value on a Recurring Basis	'
	The following tables present the assets and liabilities reported on the consolidated statements of financial condition at their fair value on a recurring basis as of September 30, 2013 and December 31, 2012 by level within the fair value hierarchy. As required by GAAP, financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement.
			As of September 30, 2013
	(Dollar amounts in thousands)		Quoted Prices in			Significant Other		Significant			Total
			Active Markets			Observable Inputs		Unobservable
			for Identical			(Level II)		Inputs (Level III)
			Assets or
			Liabilities (Level I)
	Assets:
	Securities available for sale
	Trust preferred securities		$	—		$	1,720	$	36,768		$	38,488
	Municipal securities			—			179,437		—			179,437
	Equity securities			1,729			—		—			1,729
	Corporate bonds			—			214,720		—			214,720
	Mortgage backed securities
	U.S. sponsored entities			—			631,071		—			631,071
	Private label			—			1,956		—			1,956
	Subtotal mortgage-backed securities			—			633,027		—			633,027
	Total securities available for sale		$	1,729		$	1,028,904	$	36,768		$	1,067,401
	Other Assets
	Interest rate caps		$	—		$	638	$	—		$	638
	Total other assets		$	—		$	638	$	—		$	638
	Liabilities
	Other Liabilities
	Interest rate swaps		$	—		$	4,258	$	—		$	4,258
	Total other liabilities		$	—		$	4,258	$	—		$	4,258
			As of December 31, 2012
	(Dollar amounts in thousands)		Quoted Prices in			Significant Other		Significant			Total
			Active Markets			Observable Inputs		Unobservable
			for Identical			(Level II)		Inputs (Level III)
			Assets or
			Liabilities (Level I)
	Assets:
	Securities available for sale
	Trust preferred securities		$	—		$	1,848	$	36,179		$	38,027
	Municipal securities			—			190,887		—			190,887
	Equity securities			1,818			—		—			1,818
	Corporate bonds			—			225,795		—			225,795
	Mortgage backed securities
	U.S. sponsored entities			—			649,933		—			649,933
	Private label			—			4,316		—			4,316
	Subtotal mortgage-backed securities			—			654,249		—			654,249
	Total securities available for sale		$	1,818		$	1,072,779	$	36,179		$	1,110,776
	Other Assets
	Interest rate caps		$	—		$	90	$	—		$	90
	Total other assets		$	—		$	90	$	—		$	90
	Liabilities:
	Other Liabilties
	Interest rate swaps		$	—		$	5,743	$	—		$	5,743
	Total other liabilities		$	—		$	5,743	$	—		$	5,743
Fair Value Measurements Using Significant Unobservable Inputs (Level III)	'
	Fair value measurements using significant unobservable inputs (Level III).
	(Dollar amounts in thousands)
			Securities available for sale					Securities available for sale
			Three months ended					Nine months ended
			September 30,					September 30,
			2013			2012		2013			2012
	Beginning balance January 1,		$	36,934		$	35,604	$	36,179		$	35,789
	Total net realized/unrealized gains (losses)
	Included in earnings:
	Interest income on securities			3			4		10			11
	Net realized loss on securities available for sale			—			—		—			(5	)
	Included in other comprehensive income			(169	)		214		579			27
	Transfers in and/or out of Level III			—			—		—			—
	Purchases, issuances and settlements
	Purchases			—			—		—			—
	Issuances			—			—		—			—
	Sales			—			—		—			—
	Settlements			—			—		—			—
	Ending balance, September 30,		$	36,768		$	35,822	$	36,768		$	35,822
Changes in Unrealized Gains and Losses Recorded in Earnings for Level III Assets and Liabilities	'
	The following table summarizes changes in unrealized gains and losses recorded in earnings for the three and nine month period ended September 30, 2013 and 2012 for Level III assets and liabilities that are still held at September 30, 2013 and 2012.
	(Dollar amounts in thousands)
			Securities available for sale					Securities available for sale
			Three months ended					Nine months ended
			September 30,					September 30,
			2013			2012		2013			2012
	Interest income on securities		$	3		$	4	$	10		$	11
	Net realized loss on securities available for sale			—			—		—			(5	)
	Total		$	3		$	4	$	10		$	6
Schedule of Fair Value Level III Assets Measured at Fair Value on a Recurring or Non- Recurring Basis	'
	For Level III assets measured at fair value on a recurring or non-recurring basis as of September 30, 2013, the significant observable inputs used in the fair value measurements were as follows:
	(Dollar amounts in thousands)
			Fair Value at			Fair Value at		Valuation Technique		Significant Unobservable Inputs	Range ( Weighted Average)
			September 30,			December 31,
			2013			2012
	Trust Preferred Securities		$	36,768		$	36,179	Discounted Cash Flow		Credit Spreads	45-75 (62.5) basis points
										Liquidity Risk Adjustments	20-55 (36) basis points
										Default Rates	.6% -1%
	Impaired Loans			16,177			14,740	Discounted Cash Flow		Remaining term	0 yrs to 27.2 yrs (24 yrs)
										Discount Rate	3.625%-16.3% (6.42%)
								Appraisal of collateral		Appraisal adj and liquidation exp	2,000-500,000
	Real estate acquired through foreclosure			1,977			2,441	Appraisal of collateral (1)		N/A	N/A
	Servicing assets			8			14	Discounted Cash Flow		Remaining term	.2 yrs to 18 yrs (12 yrs)
										Discount Rate	11.25%-12.25% (11.51%)
	-1	Fair value is generally determined through independent appraisals of the underlying collateral, which generally includes various level III inputs which are not identifiable. Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses.

Financial_Instruments_Tables

Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'
Carrying Amount and Fair Value of the Company's Financial Instruments	'
	The following tables set forth the carrying amount and fair value of the Company’s financial instruments included in the consolidated statement of financial condition as of September 30, 2013 and December 31, 2012:
	September 30, 2013
	(Dollar amounts in thousands)	Carrying		Quoted Prices		Significant		Significant		Total Fair
		amount		in Active		Other		Unobservable		Value
				Markets for		Observable		Inputs
				Identical Assets		Inputs		(Level III)
				or Liabilities		(Level II)
				(Level I)
	Financial Assets:
	Cash and Cash Equivalents	$	19,839	$	19,839	$	—	$	—	$	19,839
	Securities		1,067,401		1,729		1,028,904		36,768		1,067,401
	Securities Receivable		1,319		1,319		—		—		1,319
	Loans receivable and held for sale		683,704		—		—		699,504		699,504
	Accrued Interest Receivable		7,582		7,582		—		—		7,582
	FHLB Stock		13,655		13,655		—		—		13,655
	Bank owned life insurance		30,460		30,460		—		—		30,460
	Interest rate cap contracts		638		—		638		—		638
	Financial Liabilities:
	Deposits		1,232,434		593,365		—		646,249		1,239,614
	Borrowed funds		422,270		—		173,535		264,947		438,482
	Junior subordinated notes		36,083		—		24,176		—		24,176
	Advance payments by borrowers for taxes and insurance		1,503		1,503		—		—		1,503
	Accrued interest payable		2,654		2,654		—		—		2,654
	Interest rate swap contracts		4,258		—		4,258		—		4,258
	December 31, 2012
	(Dollar amounts in thousands)	Carrying		Quoted Prices		Significant		Significant		Total Fair
		amount		in Active		Other		Unobservable		Value
				Markets for		Observable		Inputs
				Identical Assets		Inputs		(Level III)
				or Liabilities		(Level II)
				(Level I)
	Financial Assets:
	Cash and Cash Equivalents	$	15,064	$	15,064	$	—	$	—	$	15,064
	Securities		1,110,776		1,818		1,072,779		36,179		1,110,776
	Securities Receivable		1,277		1,277		—		—		1,277
	Loans receivable and held for sale		672,086		—		—		702,206		702,206
	Accrued Interest Receivable		8,068		8,068		—		—		8,068
	FHLB Stock		15,077		15,077		—		—		15,077
	Bank owned life insurance		30,025		30,025		—		—		30,025
	Interest rate cap contracts		90		—		90		—		90
	Financial Liabilities:
	Deposits		1,178,057		546,298		—		641,430		1,187,728
	Borrowed funds		484,556		—		260,333		249,550		509,883
	Junior subordinated notes		46,393		—		25,001		—		25,001
	Advance payments by borrowers for taxes and insurance		2,619		2,619		—		—		2,619
	Accrued interest payable		1,344		1,344		—		—		1,344
	Interest rate swap contracts		5,743		—		5,743		—		5,743

Summary_of_Significant_Account3

Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
	Office		Branches
	Contract		Contract
			Segment
			Office
Operations And Summary Of Significant Accounting Policies [Line Items]	'	'	'	'
Real estate development and construction maximum family residential units	'	'	4	'
Real estate development and construction minimum family residential units	'	'	1	'
Number of real estate joint ventures currently involved	'	'	8	'
Number of full service banking branches	'	'	23	'
Number of loan production offices	1	'	1	'
Number of operating segment	'	'	1	'
Stock-based compensation expense	$186,000	$116,000	$537,000	$327,000
Tax benefit from compensation expense	12,000	6,000	49,000	23,000
Unrecognized compensation cost	727,000	'	727,000	'
Share based compensation expense recognized, years	'	'	'4 years	'
Interest rate cap contracts outstanding	21	'	21	'
Interest payment in junior subordinated notes	35,000,000	'	35,000,000	'
Number of interest rate swap contracts	'	'	2	'
Minimum cumulative percentage change in anticipated cash flows	'	'	80.00%	'
Maximum cumulative percentage change in anticipated cash flows	'	'	125.00%	'
Amounts charged to current earnings	0	'	0	'
Interest Rate Swaps [Member]	'	'	'	'
Operations And Summary Of Significant Accounting Policies [Line Items]	'	'	'	'
Interest payment in junior subordinated notes	35,000,000	'	35,000,000	'
Interest Rate Caps [Member]	'	'	'	'
Operations And Summary Of Significant Accounting Policies [Line Items]	'	'	'	'
Interest payment in junior subordinated notes	$220,000,000	'	$220,000,000	'
AMSCO Inc [Member]	'	'	'	'
Operations And Summary Of Significant Accounting Policies [Line Items]	'	'	'	'
Ownership percentage	'	'	51.00%	'

Summary_of_Significant_Account4

Summary of Significant Accounting Policies - Summary of Interest Rate Swap Contract (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013
Derivative [Line Items]	'
Notional Amount	$35,000
Unrealized Gain	'
Unrealized Loss	1,448
4.18 % Cash Flow Hedge [Member]	'
Derivative [Line Items]	'
Notional Amount	20,000
Effective Date	10-Feb-11
Pay Rate	4.18%
Receive Rate	0.28%
Maturity Date	10-Feb-18
Unrealized Gain	'
Unrealized Loss	862
3.91 % Cash Flow Hedge [Member]	'
Derivative [Line Items]	'
Notional Amount	15,000
Effective Date	10-Feb-11
Pay Rate	3.91%
Receive Rate	0.28%
Maturity Date	10-Feb-18
Unrealized Gain	'
Unrealized Loss	$586

Securities_Available_for_Sale_1

Securities Available for Sale - Schedule of Securities Available for Sale Portfolio (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized cost	$1,049,130	$1,065,447
Unrealized gains	34,659	55,144
Unrealized losses	-16,388	-9,815
Fair value	1,067,401	1,110,776
Trust Preferred Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized cost	45,898	45,894
Unrealized gains	245	367
Unrealized losses	-7,655	-8,234
Fair value	38,488	38,027
Municipal Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized cost	176,076	177,414
Unrealized gains	6,649	13,717
Unrealized losses	-3,288	-244
Fair value	179,437	190,887
Equity Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized cost	953	1,142
Unrealized gains	776	676
Unrealized losses	'	'
Fair value	1,729	1,818
Corporate Bonds [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized cost	209,153	219,700
Unrealized gains	6,044	7,186
Unrealized losses	-477	-1,091
Fair value	214,720	225,795
U.S. Sponsored Entities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized cost	615,116	617,158
Unrealized gains	20,921	33,021
Unrealized losses	-4,966	-246
Fair value	631,071	649,933
Private Label [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized cost	1,934	4,139
Unrealized gains	24	177
Unrealized losses	-2	'
Fair value	1,956	4,316
Subtotal Mortgage-Backed Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized cost	617,050	621,297
Unrealized gains	20,945	33,198
Unrealized losses	-4,968	-246
Fair value	$633,027	$654,249

Securities_Available_for_Sale_2

Securities Available for Sale - Schedule of Investments Gross Unrealized Losses and Fair Value (Detail) (USD $)	9 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
	Security	Security
Schedule of Available-for-sale Securities [Line Items]	'	'
Less than 12 Months, # of Securities	91	18
Less than 12 Months, Fair Value	$217,665	$48,029
Less than 12 Months, Unrealized losses	8,022	414
12 Months or more, # of Securities	15	16
12 Months or more, Fair Value	55,053	59,258
12 Months or more, Unrealized losses	8,366	9,401
Total, # of Securities	106	34
Total, Fair Value	272,718	107,287
Total, Unrealized losses	16,388	9,815
Trust Preferred Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Less than 12 Months, # of Securities	'	'
Less than 12 Months, Fair Value	'	'
Less than 12 Months, Unrealized losses	'	'
12 Months or more, # of Securities	9	9
12 Months or more, Fair Value	36,768	36,179
12 Months or more, Unrealized losses	7,655	8,234
Total, # of Securities	9	9
Total, Fair Value	36,768	36,179
Total, Unrealized losses	7,655	8,234
Municipal Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Less than 12 Months, # of Securities	33	5
Less than 12 Months, Fair Value	27,172	4,179
Less than 12 Months, Unrealized losses	2,894	58
12 Months or more, # of Securities	2	2
12 Months or more, Fair Value	2,853	3,059
12 Months or more, Unrealized losses	394	186
Total, # of Securities	35	7
Total, Fair Value	30,025	7,238
Total, Unrealized losses	3,288	244
Corporate Bonds [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Less than 12 Months, # of Securities	5	5
Less than 12 Months, Fair Value	13,894	15,604
Less than 12 Months, Unrealized losses	160	110
12 Months or more, # of Securities	4	5
12 Months or more, Fair Value	15,432	20,020
12 Months or more, Unrealized losses	317	981
Total, # of Securities	9	10
Total, Fair Value	29,326	35,624
Total, Unrealized losses	477	1,091
U.S. Sponsored Entities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Less than 12 Months, # of Securities	52	8
Less than 12 Months, Fair Value	176,057	28,246
Less than 12 Months, Unrealized losses	4,966	246
12 Months or more, # of Securities	'	'
12 Months or more, Fair Value	'	'
12 Months or more, Unrealized losses	'	'
Total, # of Securities	52	8
Total, Fair Value	176,057	28,246
Total, Unrealized losses	4,966	246
Private Label [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Less than 12 Months, # of Securities	1	'
Less than 12 Months, Fair Value	542	'
Less than 12 Months, Unrealized losses	2	'
12 Months or more, # of Securities	'	'
12 Months or more, Fair Value	'	'
12 Months or more, Unrealized losses	'	'
Total, # of Securities	1	'
Total, Fair Value	542	'
Total, Unrealized losses	2	'
Subtotal Mortgage-Backed Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Less than 12 Months, # of Securities	53	'
Less than 12 Months, Fair Value	176,599	'
Less than 12 Months, Unrealized losses	4,968	'
12 Months or more, # of Securities	'	'
12 Months or more, Fair Value	'	'
12 Months or more, Unrealized losses	'	'
Total, # of Securities	53	'
Total, Fair Value	176,599	'
Total, Unrealized losses	$4,968	'

Securities_Available_for_Sale_3

Securities Available for Sale - Additional Information (Detail) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
	Entity
Investments Debt And Equity Securities [Abstract]	'	'
OTTI Recognized	$0	$406,000
Number of financial institutions collateralized debt obligation	9	'
Additional credit impairment	0	'
Company recorded impairment charges	2,000,000	31,000
Proceeds from the sale of securities	2,000,000	1,100,000
Gross realized gains from sale of securities	525,000	464,000
Gross realized losses	$0	$0

Securities_Available_for_Sale_4

Securities Available for Sale - Scheduled Maturities of Securities (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Available For Sale Securities Debt Maturities [Abstract]	'	'
Weighted Average Yield, Due in one year or less	2.83%	3.80%
Weighted Average Yield, Due from one year to five years	3.12%	3.05%
Weighted Average Yield, Due from five to ten years	3.26%	3.27%
Weighted Average Yield, Due after ten years	3.08%	3.30%
Weighted Average Yield, Total	3.10%	3.26%
Amortized cost, Due in one year or less	$33,273	$19,137
Amortized cost, Due from one year to five years	173,386	187,595
Amortized cost, Due from five to ten years	106,118	108,288
Amortized cost, Due after ten years	735,400	749,285
Amortized cost, Total	1,048,177	1,064,305
Fair value, Due in one year or less	33,721	19,411
Fair value, Due from one year to five years	179,923	195,182
Fair value, Due from five to ten years	108,038	111,879
Fair value, Due after ten years	743,990	782,486
Fair value, Total	$1,065,672	$1,108,958

Loans_Receivable_Schedule_of_L

Loans Receivable - Schedule of Loans Receivable (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total residential real estate	$420,033	$405,895
Total commercial real estate	96,115	96,955
Subtotal mortgage loans	516,148	502,850
Total consumer loans	137,293	134,885
Commercial business	51,148	54,445
Subtotal other loans	188,441	189,330
Total Loans Receivable	704,589	692,180
Allowance for loan losses	6,713	6,709
Deferred loan fees and net discounts	-2,133	-1,862
Loans in process	16,305	15,247
Subtotal	20,885	20,094
Net loans receivable	683,704	672,086
Residential Real Estate, Single Family [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total residential real estate	335,419	326,005
Total Loans Receivable	335,419	326,005
Residential Real Estate Multi-Family [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total residential real estate	38,291	33,472
Total Loans Receivable	38,291	33,472
Residential Real Estate, Construction [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total residential real estate	46,323	46,418
Total Loans Receivable	46,323	46,418
Commercial Real Estate [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total commercial real estate	79,299	81,077
Total Loans Receivable	96,115	96,955
Commercial Real Estate, Construction [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total commercial real estate	16,816	15,878
Total Loans Receivable	16,816	15,878
Consumer Home Equity [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total consumer loans	82,193	80,418
Total Loans Receivable	82,193	80,418
Dealer Auto and RV Loans [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total consumer loans	48,003	46,571
Total Loans Receivable	48,003	46,571
Other Consumer [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total consumer loans	7,097	7,896
Total Loans Receivable	$7,097	$7,896

Loans_Receivable_Additional_In

Loans Receivable - Additional Information (Detail) (USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
	Office	Office
Receivables [Abstract]	'	'
Number of offices of company	23	23
Historical loss calculation period	'3 years	'
Allowance for loan losses	$6,713,000	$6,709,000
Borrowers sustained repayment period	'6 months	'
Non-performing loans, including non-accrual loans and TDRs	6,665,000	7,393,000
Troubled debt restructuring (TDRs)	112,000	368,000
TDR with modified terms	$10,600,000	$8,200,000
Maturity period of impaired loans	'90 days	'
Maturity period of Larger commercial loans	'60 days	'
Description of Loans	'Loans are considered nonaccrual upon reaching 90 days delinquency	'

Loans_Receivable_Changes_in_Al

Loans Receivable - Changes in Allowance for Loan Losses and Recorded Investment in Loans (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'
Beginning balance	$6,728	$6,741	$6,709	$6,537	'
Charge-offs	123	554	396	917	'
Recoveries	33	27	100	94	'
Provision	75	350	300	850	'
Reallocations	'	'	'	'	'
Ending Balance	6,713	6,564	6,713	6,564	'
Ending balance: individually evaluated for impairment	1,112	'	1,112	'	1,164
Ending balance: collectively evaluated for impairment	5,601	'	5,601	'	5,545
Loans Receivable:	'	'	'	'	'
Ending Balance	704,589	'	704,589	'	692,180
Ending balance: individually evaluated for impairment	17,289	'	17,289	'	15,904
Ending balance: collectively evaluated for impairment	687,300	'	687,300	'	676,276
Commercial [Member]	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'
Beginning balance	543	434	550	384	'
Charge-offs	17	32	17	32	'
Recoveries	'	'	'	'	'
Provision	18	94	38	144	'
Reallocations	-44	'	-71	'	'
Ending Balance	500	496	500	496	'
Ending balance: individually evaluated for impairment	'	'	'	'	'
Ending balance: collectively evaluated for impairment	500	'	500	'	550
Loans Receivable:	'	'	'	'	'
Ending Balance	51,148	'	51,148	'	54,445
Ending balance: individually evaluated for impairment	'	'	'	'	'
Ending balance: collectively evaluated for impairment	51,148	'	51,148	'	54,445
Commercial Real Estate [Member]	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'
Beginning balance	2,102	2,299	2,075	2,442	'
Charge-offs	'	163	7	163	'
Recoveries	'	'	'	'	'
Provision	63	'	138	'	'
Reallocations	-107	-62	-148	-205	'
Ending Balance	2,058	2,074	2,058	2,074	'
Ending balance: individually evaluated for impairment	1,063	'	1,063	'	1,110
Ending balance: collectively evaluated for impairment	995	'	995	'	965
Loans Receivable:	'	'	'	'	'
Ending Balance	96,115	'	96,115	'	96,955
Ending balance: individually evaluated for impairment	14,688	'	14,688	'	13,414
Ending balance: collectively evaluated for impairment	81,427	'	81,427	'	83,541
Consumer [Member]	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'
Beginning balance	1,062	1,004	1,031	1,045	'
Charge-offs	93	206	346	445	'
Recoveries	33	27	100	77	'
Provision	34	174	72	322	'
Reallocations	63	'	242	'	'
Ending Balance	1,099	999	1,099	999	'
Ending balance: individually evaluated for impairment	49	'	49	'	54
Ending balance: collectively evaluated for impairment	1,050	'	1,050	'	977
Loans Receivable:	'	'	'	'	'
Ending Balance	137,293	'	137,293	'	134,885
Ending balance: individually evaluated for impairment	394	'	394	'	327
Ending balance: collectively evaluated for impairment	136,899	'	136,899	'	134,558
Residential [Member]	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'
Beginning balance	2,425	2,519	2,541	2,115	'
Charge-offs	13	153	24	277	'
Recoveries	'	'	'	17	'
Provision	-40	82	52	384	'
Reallocations	233	97	36	306	'
Ending Balance	2,605	2,545	2,605	2,545	'
Ending balance: individually evaluated for impairment	'	'	'	'	'
Ending balance: collectively evaluated for impairment	2,605	'	2,605	'	2,541
Loans Receivable:	'	'	'	'	'
Ending Balance	420,033	'	420,033	'	405,895
Ending balance: individually evaluated for impairment	2,207	'	2,207	'	2,163
Ending balance: collectively evaluated for impairment	417,826	'	417,826	'	403,732
Unallocated [Member]	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'
Beginning balance	596	485	512	551	'
Charge-offs	'	'	2	'	'
Recoveries	'	'	'	'	'
Provision	'	'	'	'	'
Reallocations	-145	-35	-59	-101	'
Ending Balance	451	450	451	450	'
Ending balance: individually evaluated for impairment	'	'	'	'	'
Ending balance: collectively evaluated for impairment	451	'	451	'	512
Loans Receivable:	'	'	'	'	'
Ending Balance	'	'	'	'	'
Ending balance: individually evaluated for impairment	'	'	'	'	'
Ending balance: collectively evaluated for impairment	'	'	'	'	'

Loans_Receivable_Schedule_of_C

Loans Receivable - Schedule of Credit Exposures by Internally Assigned Grades (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Residential Real Estate Multi-Family [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	$38,291	$33,472
Residential Real Estate Multi-Family [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	38,291	33,472
Residential Real Estate Multi-Family [Member] | Special Mention [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	'	'
Residential Real Estate Multi-Family [Member] | Substandard [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	'	'
Residential Real Estate Multi-Family [Member] | Doubtful [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	'	'
Residential Real Estate Multi-Family [Member] | Loss [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	'	'
Residential Real Estate, Construction [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	46,323	46,418
Residential Real Estate, Construction [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	42,563	41,138
Residential Real Estate, Construction [Member] | Special Mention [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	681	4,477
Residential Real Estate, Construction [Member] | Substandard [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	3,079	803
Residential Real Estate, Construction [Member] | Doubtful [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	'	'
Residential Real Estate, Construction [Member] | Loss [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	'	'
Commercial Real Estate [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	79,299	81,077
Commercial Real Estate [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	64,903	65,696
Commercial Real Estate [Member] | Special Mention [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	1,369	1,334
Commercial Real Estate [Member] | Substandard [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	13,027	14,047
Commercial Real Estate [Member] | Doubtful [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	'	'
Commercial Real Estate [Member] | Loss [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	'	'
Commercial Real Estate, Construction [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	16,816	15,878
Commercial Real Estate, Construction [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	16,816	15,878
Commercial Real Estate, Construction [Member] | Special Mention [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	'	'
Commercial Real Estate, Construction [Member] | Substandard [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	'	'
Commercial Real Estate, Construction [Member] | Doubtful [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	'	'
Commercial Real Estate, Construction [Member] | Loss [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	'	'
Commercial [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	51,148	54,445
Commercial [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	51,071	53,883
Commercial [Member] | Special Mention [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	22	527
Commercial [Member] | Substandard [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	55	35
Commercial [Member] | Doubtful [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	'	'
Commercial [Member] | Loss [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	'	'

Loans_Receivable_Performing_an

Loans Receivable - Performing and Nonperforming Single Family Residential and Consumer Loans Based on Payment Activity (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Residential Real Estate, Single Family [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	$335,419	$326,005
Residential Real Estate, Single Family [Member] | Performing [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	331,904	322,662
Residential Real Estate, Single Family [Member] | Nonperforming [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	3,515	3,343
Consumer Home Equity [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	82,193	80,418
Consumer Home Equity [Member] | Performing [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	81,892	80,124
Consumer Home Equity [Member] | Nonperforming [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	301	294
Dealer Auto and RV Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	48,003	46,571
Dealer Auto and RV Loans [Member] | Performing [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	47,832	46,450
Dealer Auto and RV Loans [Member] | Nonperforming [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	171	121
Other Consumer [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	7,097	7,896
Other Consumer [Member] | Performing [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	7,017	7,787
Other Consumer [Member] | Nonperforming [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Financing Receivable	$80	$109

Loans_Receivable_Aging_Analysi

Loans Receivable - Aging Analysis of Investment of Past Due Loans Receivable (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	$1,510	$2,193
60-89 Days Past Due	956	1,262
90 Days Or Greater	6,665	7,025
Total Past Due	9,131	10,480
Current	695,458	681,700
Total Loans Receivable	704,589	692,180
Recorded Investment greater than 90 Days and Accruing	'	'
Residential Real Estate, Single Family [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	855	887
60-89 Days Past Due	383	420
90 Days Or Greater	3,515	3,343
Total Past Due	4,753	4,650
Current	330,666	321,355
Total Loans Receivable	335,419	326,005
Recorded Investment greater than 90 Days and Accruing	'	'
Residential Real Estate, Construction [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	'	'
60-89 Days Past Due	'	'
90 Days Or Greater	'	'
Total Past Due	'	'
Current	38,291	46,418
Total Loans Receivable	46,323	46,418
Recorded Investment greater than 90 Days and Accruing	'	'
Residential Real Estate Multi-Family [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	'	'
60-89 Days Past Due	'	'
90 Days Or Greater	'	'
Total Past Due	'	'
Current	46,323	33,472
Total Loans Receivable	38,291	33,472
Recorded Investment greater than 90 Days and Accruing	'	'
Commercial Real Estate, Commercial [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	75	246
60-89 Days Past Due	397	598
90 Days Or Greater	2,631	3,211
Total Past Due	3,103	4,055
Current	76,196	77,022
Total Loans Receivable	79,299	81,077
Recorded Investment greater than 90 Days and Accruing	'	'
Commercial Real Estate, Construction [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	'	'
60-89 Days Past Due	'	'
90 Days Or Greater	'	'
Total Past Due	'	'
Current	16,816	15,878
Total Loans Receivable	16,816	15,878
Recorded Investment greater than 90 Days and Accruing	'	'
Consumer Home Equity [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	129	219
60-89 Days Past Due	'	'
90 Days Or Greater	237	223
Total Past Due	366	442
Current	81,827	79,976
Total Loans Receivable	82,193	80,418
Recorded Investment greater than 90 Days and Accruing	'	'
Dealer Auto and RV Loans [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	433	771
60-89 Days Past Due	172	230
90 Days Or Greater	169	104
Total Past Due	774	1,105
Current	47,229	45,466
Total Loans Receivable	48,003	46,571
Recorded Investment greater than 90 Days and Accruing	'	'
Other Consumer [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	17	70
60-89 Days Past Due	4	12
90 Days Or Greater	80	109
Total Past Due	101	191
Current	6,996	7,705
Total Loans Receivable	7,097	7,896
Recorded Investment greater than 90 Days and Accruing	'	'
Commercial [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	1	'
60-89 Days Past Due	'	2
90 Days Or Greater	33	35
Total Past Due	34	37
Current	51,114	54,408
Total Loans Receivable	51,148	54,445
Recorded Investment greater than 90 Days and Accruing	'	'

Loans_Receivable_Recorded_Inve

Loans Receivable - Recorded Investment and Unpaid Principal Balances for Impaired Loans Receivable (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Schedule Of Financial Receivables [Line Items]	'	'
Recorded Investment	$17,289	$15,904
Unpaid Principal Balance	17,562	16,174
Related Allowance	1,112	1,164
Commercial Real Estate [Member]	'	'
Schedule Of Financial Receivables [Line Items]	'	'
Recorded Investment	14,688	13,414
Unpaid Principal Balance	14,958	13,684
Related Allowance	1,063	1,110
Residential Real Estate, Single Family [Member]	'	'
Schedule Of Financial Receivables [Line Items]	'	'
Recorded Investment	1,357	1,360
Unpaid Principal Balance	1,357	1,360
Related Allowance	'	'
Residential Construction Loans [Member]	'	'
Schedule Of Financial Receivables [Line Items]	'	'
Recorded Investment	850	803
Unpaid Principal Balance	850	803
Related Allowance	'	'
Consumer [Member]	'	'
Schedule Of Financial Receivables [Line Items]	'	'
Recorded Investment	394	327
Unpaid Principal Balance	397	327
Related Allowance	49	54
With No Related Allowance Recorded [Member] | Commercial Real Estate [Member]	'	'
Schedule Of Financial Receivables [Line Items]	'	'
Recorded Investment	5,532	5,433
Unpaid Principal Balance	5,639	5,540
Related Allowance	'	'
With No Related Allowance Recorded [Member] | Residential Real Estate, Single Family [Member]	'	'
Schedule Of Financial Receivables [Line Items]	'	'
Recorded Investment	1,357	1,360
Unpaid Principal Balance	1,357	1,360
Related Allowance	'	'
With No Related Allowance Recorded [Member] | Residential Construction Loans [Member]	'	'
Schedule Of Financial Receivables [Line Items]	'	'
Recorded Investment	850	803
Unpaid Principal Balance	850	803
Related Allowance	'	'
With No Related Allowance Recorded [Member] | Consumer Home Equity [Member]	'	'
Schedule Of Financial Receivables [Line Items]	'	'
Recorded Investment	211	130
Unpaid Principal Balance	236	130
Related Allowance	'	'
With No Related Allowance Recorded [Member] | Dealer Auto and RV Loans [Member]	'	'
Schedule Of Financial Receivables [Line Items]	'	'
Recorded Investment	8	14
Unpaid Principal Balance	8	14
Related Allowance	'	'
With an Allowance Recorded [Member] | Commercial Real Estate [Member]	'	'
Schedule Of Financial Receivables [Line Items]	'	'
Recorded Investment	9,156	7,981
Unpaid Principal Balance	9,319	8,144
Related Allowance	1,063	1,110
With an Allowance Recorded [Member] | Consumer Home Equity [Member]	'	'
Schedule Of Financial Receivables [Line Items]	'	'
Recorded Investment	172	179
Unpaid Principal Balance	150	179
Related Allowance	46	50
With an Allowance Recorded [Member] | Dealer Auto and RV Loans [Member]	'	'
Schedule Of Financial Receivables [Line Items]	'	'
Recorded Investment	3	4
Unpaid Principal Balance	3	4
Related Allowance	$3	$4

Loans_Receivable_Average_Recor

Loans Receivable - Average Recorded Investment and Interest Income Recognized on Loans (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Commercial Real Estate [Member]	'	'	'	'
Schedule Of Financial Receivables [Line Items]	'	'	'	'
Average Recorded Investment	$14,738	$13,699	$13,837	$13,841
Interest Income Recognized	173	163	551	489
Residential Real Estate, Single Family [Member]	'	'	'	'
Schedule Of Financial Receivables [Line Items]	'	'	'	'
Average Recorded Investment	1,358	1,361	1,359	1,362
Interest Income Recognized	3	2	7	7
Residential Construction Loans [Member]	'	'	'	'
Schedule Of Financial Receivables [Line Items]	'	'	'	'
Average Recorded Investment	885	102	894	421
Interest Income Recognized	7	10	25	32
Consumer [Member]	'	'	'	'
Schedule Of Financial Receivables [Line Items]	'	'	'	'
Average Recorded Investment	382	243	367	196
Interest Income Recognized	7	11	20	16
Commercial [Member]	'	'	'	'
Schedule Of Financial Receivables [Line Items]	'	'	'	'
Average Recorded Investment	'	37	'	41
Interest Income Recognized	'	2	'	2
With No Related Allowance Recorded [Member] | Commercial Real Estate [Member]	'	'	'	'
Schedule Of Financial Receivables [Line Items]	'	'	'	'
Average Recorded Investment	5,562	5,451	5,325	5,488
Interest Income Recognized	57	58	177	170
With No Related Allowance Recorded [Member] | Residential Real Estate, Single Family [Member]	'	'	'	'
Schedule Of Financial Receivables [Line Items]	'	'	'	'
Average Recorded Investment	1,358	1,361	1,359	1,362
Interest Income Recognized	3	2	7	7
With No Related Allowance Recorded [Member] | Residential Construction Loans [Member]	'	'	'	'
Schedule Of Financial Receivables [Line Items]	'	'	'	'
Average Recorded Investment	885	102	894	421
Interest Income Recognized	7	10	25	32
With No Related Allowance Recorded [Member] | Consumer Home Equity [Member]	'	'	'	'
Schedule Of Financial Receivables [Line Items]	'	'	'	'
Average Recorded Investment	198	91	179	43
Interest Income Recognized	4	10	10	10
With No Related Allowance Recorded [Member] | Dealer Auto and RV Loans [Member]	'	'	'	'
Schedule Of Financial Receivables [Line Items]	'	'	'	'
Average Recorded Investment	9	'	10	'
Interest Income Recognized	'	'	2	'
With an Allowance Recorded [Member] | Commercial Real Estate [Member]	'	'	'	'
Schedule Of Financial Receivables [Line Items]	'	'	'	'
Average Recorded Investment	9,176	8,248	8,512	8,353
Interest Income Recognized	116	105	374	319
With an Allowance Recorded [Member] | Consumer Home Equity [Member]	'	'	'	'
Schedule Of Financial Receivables [Line Items]	'	'	'	'
Average Recorded Investment	172	152	174	153
Interest Income Recognized	3	1	8	6
With an Allowance Recorded [Member] | Dealer Auto and RV Loans [Member]	'	'	'	'
Schedule Of Financial Receivables [Line Items]	'	'	'	'
Average Recorded Investment	3	'	4	'
Interest Income Recognized	'	'	'	'
With an Allowance Recorded [Member] | Commercial Business Loans [Member]	'	'	'	'
Schedule Of Financial Receivables [Line Items]	'	'	'	'
Average Recorded Investment	'	37	'	41
Interest Income Recognized	'	$2	'	$2

Loans_Receivable_Schedule_of_L1

Loans Receivable - Schedule of Loans Receivable on Nonaccrual Status (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Non Accrual Loans Segregated By Class Of Loans [Line Items]	'	'
Loans receivable on nonaccrual status	$6,665	$7,393
Commercial [Member]	'	'
Non Accrual Loans Segregated By Class Of Loans [Line Items]	'	'
Loans receivable on nonaccrual status	33	35
Commercial Real Estate [Member]	'	'
Non Accrual Loans Segregated By Class Of Loans [Line Items]	'	'
Loans receivable on nonaccrual status	2,631	3,432
Consumer [Member]	'	'
Non Accrual Loans Segregated By Class Of Loans [Line Items]	'	'
Loans receivable on nonaccrual status	'	'
Consumer Home Equity [Member]	'	'
Non Accrual Loans Segregated By Class Of Loans [Line Items]	'	'
Loans receivable on nonaccrual status	237	293
Dealer Auto and RV Loans [Member]	'	'
Non Accrual Loans Segregated By Class Of Loans [Line Items]	'	'
Loans receivable on nonaccrual status	168	121
Other Consumer [Member]	'	'
Non Accrual Loans Segregated By Class Of Loans [Line Items]	'	'
Loans receivable on nonaccrual status	80	109
Residential [Member]	'	'
Non Accrual Loans Segregated By Class Of Loans [Line Items]	'	'
Loans receivable on nonaccrual status	$3,516	$3,403

Loans_Receivable_Summary_of_In

Loans Receivable - Summary of Information Relating to Troubled Debt Restructuring by Class of Loans (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
	Contract	Contract	Contract	Contract
Financing Receivable Modifications Number Of Contracts [Line Items]	'	'	'	'
Number of Contracts	1	6	19	10
Pre-Modification Outstanding Recorded Investment	$25	$139	$2,447	$1,186
Maturity Date Extension	25	139	142	1,086
Deferral of Principal Payments	'	'	'	'
Other	'	'	2,305	100
Total	25	139	2,447	1,186
Consumer Home Equity [Member]	'	'	'	'
Financing Receivable Modifications Number Of Contracts [Line Items]	'	'	'	'
Number of Contracts	1	6	7	6
Pre-Modification Outstanding Recorded Investment	25	139	116	139
Maturity Date Extension	25	139	116	139
Deferral of Principal Payments	'	'	'	'
Other	'	'	'	'
Total	25	139	116	139
Commercial Real Estate [Member]	'	'	'	'
Financing Receivable Modifications Number Of Contracts [Line Items]	'	'	'	'
Number of Contracts	'	'	12	1
Pre-Modification Outstanding Recorded Investment	'	'	2,331	100
Maturity Date Extension	'	'	26	'
Deferral of Principal Payments	'	'	'	'
Other	'	'	2,305	100
Total	'	'	2,331	100
Residential Construction Loans [Member]	'	'	'	'
Financing Receivable Modifications Number Of Contracts [Line Items]	'	'	'	'
Number of Contracts	'	'	'	3
Pre-Modification Outstanding Recorded Investment	'	'	'	947
Maturity Date Extension	'	'	'	947
Deferral of Principal Payments	'	'	'	'
Other	'	'	'	'
Total	'	'	'	$947

Deposits_Summary_of_Deposits_D

Deposits - Summary of Deposits (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Banking And Thrift [Abstract]	'	'
Noninterest-bearing deposits	$126,214	$109,964
NOW account deposits	248,178	223,736
Money Market deposits	41,226	39,255
Passbook account deposits	177,747	173,343
Time deposits	639,069	631,759
Total	$1,232,434	$1,178,057
Percentage of noninterest-bearing deposits	10.20%	9.30%
Percentage of NOW account deposits	20.10%	19.00%
Percentage of Money Market deposits	3.30%	3.30%
Percentage of Passbook account deposits	14.40%	14.70%
Percentage of Time deposits	52.00%	53.70%
Percentage of deposits, total	100.00%	100.00%

Deposits_Schedule_of_Deposits_

Deposits - Schedule of Deposits of Time Deposits Maturity (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Banking And Thrift [Abstract]	'	'
Within one year	$417,278	$375,862
After one year through two years	124,448	118,333
After two years through three years	59,889	78,492
After three years through four years	19,053	36,920
After four years through five years	13,216	17,106
Thereafter	5,185	5,046
Total	$639,069	$631,759
Within one year, Weighted average rate	65.20%	59.60%
After one year through two years, Weighted average rate	19.50%	18.70%
After two years through three years, Weighted average rate	9.40%	12.40%
After three years through four years, Weighted average rate	3.00%	5.80%
After four years through five years, Weighted average rate	2.10%	2.70%
Thereafter, Weighted average rate	0.80%	0.80%
Total, Weighted average rate	100.00%	100.00%

Borrowed_Funds_Summary_of_Borr

Borrowed Funds - Summary of Borrowed Funds (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Proforma Debt Instrument [Line Items]	'	'
Due within 12 months, Weighted average rate	2.42%	2.69%
Due beyond 12 months but within 2 years, Weighted average rate	2.14%	2.88%
Due beyond 2 years but within 3 years, Weighted average rate	1.02%	3.13%
Due beyond 3 years but within 4 years, Weighted average rate	1.29%	2.15%
Due beyond 4 years but within 5 years, Weighted average rate	3.08%	1.03%
Due beyond 5 years, Weighted average rate	'	3.61%
Due within 12 months	$118,817	$100,147
Due beyond 12 months but within 2 years	29,288	71,392
Due beyond 2 years but within 3 years	47,456	15,873
Due beyond 3 years but within 4 years	43,426	8,013
Due beyond 4 years but within 5 years	12,816	7,807
Due beyond 5 years	'	10,000
Total	251,803	213,232
Repurchase Agreements [Member]	'	'
Proforma Debt Instrument [Line Items]	'	'
Due within 12 months, Weighted average rate	2.69%	2.99%
Due beyond 12 months but within 2 years, Weighted average rate	4.12%	3.07%
Due beyond 2 years but within 3 years, Weighted average rate	'	4.12%
Due beyond 3 years but within 4 years, Weighted average rate	4.28%	'
Due beyond 4 years but within 5 years, Weighted average rate	4.49%	4.28%
Due beyond 5 years, Weighted average rate	'	4.49%
Due within 12 months	78,000	148,000
Due beyond 12 months but within 2 years	10,000	40,000
Due beyond 2 years but within 3 years	'	10,000
Due beyond 3 years but within 4 years	25,000	'
Due beyond 4 years but within 5 years	45,000	25,000
Due beyond 5 years	'	45,000
Total	158,000	268,000
ESOP Borrowings [Member]	'	'
Proforma Debt Instrument [Line Items]	'	'
Due within 12 months, Weighted average rate	4.68%	4.68%
Due beyond 12 months but within 2 years, Weighted average rate	4.68%	4.68%
Due beyond 2 years but within 3 years, Weighted average rate	4.68%	4.68%
Due beyond 3 years but within 4 years, Weighted average rate	'	4.68%
Due within 12 months	1,000	1,000
Due beyond 12 months but within 2 years	1,000	1,000
Due beyond 2 years but within 3 years	500	1,000
Due beyond 3 years but within 4 years	'	250
Total	2,500	3,250
Corporate Borrowings [Member]	'	'
Proforma Debt Instrument [Line Items]	'	'
Due within 12 months, Weighted average rate	3.75%	'
Due beyond 12 months but within 2 years, Weighted average rate	3.75%	'
Due beyond 2 years but within 3 years, Weighted average rate	3.75%	'
Due beyond 3 years but within 4 years, Weighted average rate	3.75%	'
Due beyond 4 years but within 5 years, Weighted average rate	3.75%	'
Due within 12 months	1,000	'
Due beyond 12 months but within 2 years	1,000	'
Due beyond 2 years but within 3 years	1,000	'
Due beyond 3 years but within 4 years	1,000	'
Due beyond 4 years but within 5 years	5,967	'
Total	9,967	'
Borrowings for Joint Ventures [Member]	'	'
Proforma Debt Instrument [Line Items]	'	'
Due beyond 4 years but within 5 years, Weighted average rate	'	3.75%
Due beyond 4 years but within 5 years	'	74
Junior Subordinated Notes [Member]	'	'
Proforma Debt Instrument [Line Items]	'	'
Due beyond 5 years, Weighted average rate	2.08%	2.41%
Due beyond 5 years	$36,083	$46,393

Borrowed_Funds_Additional_Info

Borrowed Funds - Additional Information (Detail) (USD $)

1 Months Ended

3 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

1 Months Ended

9 Months Ended

1 Months Ended

9 Months Ended

9 Months Ended

9 Months Ended

9 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

Mar. 18, 2013

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Mar. 15, 2013

Jan. 24, 2013

Jul. 23, 2008

Sep. 30, 2013

Dec. 31, 2008

Apr. 10, 2003

Mar. 18, 2013

Sep. 30, 2013

Dec. 17, 2003

Sep. 30, 2013

Feb. 10, 2005

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Apr. 10, 2003

Sep. 30, 2013

Dec. 17, 2003

Jan. 24, 2013

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Trust II Preferred Securities [Member]

Trust III Preferred Securities [Member]

Trust IV Preferred Securities [Member]

ESB Capital Trust II (Trust II) [Member]

ESB Capital Trust II (Trust II) [Member]

ESB Capital Trust II (Trust II) [Member]

ESB Capital Trust II (Trust II) [Member]

ESB Capital Trust II (Trust II) [Member]

ESB Capital Trust II (Trust II) [Member]

ESB Statutory Trust (Trust III) [Member]

ESB Statutory Trust (Trust III) [Member]

ESB Statutory Trust (Trust III) [Member]

ESB Capital Trust IV (Trust IV) [Member]

ESB Capital Trust IV (Trust IV) [Member]

Repurchase Agreements [Member]

Repurchase Agreements [Member]

Structured REPOs [Member]

Structured REPOs [Member]

Variable Rate [Member]

Variable Rate [Member]

Variable Rate [Member]

Variable Rate [Member]

WesBanco Loan [Member]

Citigroup [Member]

Citigroup [Member]

Barclays Capital [Member]

Barclays Capital [Member]

Credit Suisse [Member]

Credit Suisse [Member]

Morgan Stanley [Member]

Morgan Stanley [Member]

Structured Advances [Member]

ESB Capital Trust II (Trust II) [Member]

ESB Capital Trust II (Trust II) [Member]

ESB Statutory Trust (Trust III) [Member]

ESB Statutory Trust (Trust III) [Member]

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

FHLB advances

'

$251,803,000

$251,803,000

$213,232,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$158,000,000

$268,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$251,800,000

Structured advances

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

40,000,000

Debt instrument variable rates basis

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'40.0 million in structured advances with imbedded caps at various strike rates based on the 3 month LIBOR rate

LIBOR Rate

'

'

'3 months

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Structured REPO's

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

158,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Repurchase agreements with flexible interest rates

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

20,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Repurchase agreements with fixed interest rate

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

25,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Market value of the securities

'

192,100,000

192,100,000

318,900,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Securities available for sale; cost

'

1,049,130,000

1,049,130,000

1,065,447,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

182,000,000

297,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Repurchase agreements, maturities

'

'

'Greater than 90 days

'Greater than 90 days

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

REPO's with other banks

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

65,000,000

115,000,000

30,000,000

40,000,000

43,000,000

83,000,000

20,000,000

30,000,000

'

Risk related to repurchase agreement amount

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

11,400,000

'

6,000,000

'

13,000,000

'

3,600,000

'

'

Weighted average maturity

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'19 months

'

'46 months

'

'36 months

'

'9 months

'

'

Average borrowings under REPO

'

158,000,000

181,300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maximum month-end outstanding amount

'

158,000,000

258,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Preferred securities

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

35,000,000

'

'

'

'

'

10,000,000

'

5,000,000

'

'

'

'

'

'

'

'

'

'

Liquidation preference per share

'

'

'

'

'

'

'

'

'

'

'

'

$1,000

'

'

$1,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Purchase of common securities

'

'

'

'

'

'

'

'

'

'

310,000

'

'

'

155,000

'

1,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Preferred securities variable interest rate

'

'

'

'

'

'

'

'

'

'

'LIBOR plus 3.25%

'

'

'

'LIBOR Index plus 2.95%

'

'Three month LIBOR plus 1.82%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Preferred securities interest rate

'

'

'

'

3.25%

2.95%

1.82%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Subordinated debt

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

36,100,000

'

'

'

'

'

10,300,000

'

5,200,000

'

'

'

'

'

'

'

'

'

'

'

Maturity date of subordinated debt start date range

'

'

'

'

'

'

'

'

'

'

24-Apr-08

'

'

'

17-Dec-08

'

10-Feb-11

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maturity date of subordinated debt end date range

'

'

'

'

'

'

'

'

'

'

24-Apr-33

'

'

'

17-Dec-33

'

10-Feb-35

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Subordinated debt redemption description

'

'

'The Company may redeem in whole, but not in part, the subordinated debt at any time within 90 days following the occurrence of such event

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Redeemed preferred securities

'

'

'

'

'

'

'

'

5,000,000

5,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds from bank loan

'

'

'

'

'

'

'

'

10,000,000

14,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Interest rate

'

'

'

'

'

'

'

'

'

'

'

5.55%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Loans Payable

'

'

'

'

'

'

'

'

'

'

'

9,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Unamortized deferred debt issuance costs

'

'

'

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fixed interest rate

'

'

'

'

'

'

6.03%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

3.75%

'

'

'

'

'

'

'

'

'

Redeemed subordinated debt and securities

'

'

'

'

'

'

'

5,000,000

'

'

'

'

'

5,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maturity of redemption of subordinated debt

'

'

'

'

'

'

'90 days

'

'

'

'

'

'

'

'90 days

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds from bank loan

$10,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Preferred securities fixed interest rate

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'6.03% for six years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maturity year of preferred securities

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'30 years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Preferred securities maturity period

'

'

'Six years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net_Income_Per_Share_Summary_o

Net Income Per Share - Summary of Net Income Per Share (Detail) (USD $)	3 Months Ended				9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Earnings Per Share [Abstract]	'		'		'		'
Net income	$3,971		$3,934		$11,561		$11,400
Weighted-average common shares outstanding	17,410,000		17,235,000		17,359,000		17,195,000
Basic earnings per share	$0.23	[1]	$0.23	[1]	$0.67	[1]	$0.66	[1]
Weighted-average common shares outstanding	17,409,820	[1]	17,234,850	[1]	17,358,818	[1]	17,194,979	[1]
Common stock equivalents due to effect of stock options	193,000		154,000		171,000		155,000
Total weighted-average common shares and equivalents	17,603,000		17,389,000		17,530,000		17,350,000
Diluted earnings per share	$0.23	[1]	$0.22	[1]	$0.66	[1]	$0.66	[1]
[1]	Outstanding shares and per share data have been adjusted to reflect the six-for-five stock split declared April 16, 2013.

Net_Income_Per_Share_Additiona

Net Income Per Share - Additional Information (Detail) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Schedule Of Earnings Per Share [Line Items]	'	'
Shares controlled by Employee Stock Ownership Plan (ESOP)	296,095	395,587
Options Expiring November 2020 [Member]	'	'
Schedule Of Earnings Per Share [Line Items]	'	'
Options excluded from computation of earnings per share	64,821	'
Options purchase price per diluted share	$10.35	'
Options Expiring November 2020 [Member] | Stock Option 1 [Member]	'	'
Schedule Of Earnings Per Share [Line Items]	'	'
Options excluded from computation of earnings per share	'	85,919
Options purchase price per diluted share	'	$10.35
Options Expiring November 2021 [Member]	'	'
Schedule Of Earnings Per Share [Line Items]	'	'
Options excluded from computation of earnings per share	77,872	91,948
Options purchase price per diluted share	$11	$11
Options Expiring November 2022 [Member]	'	'
Schedule Of Earnings Per Share [Line Items]	'	'
Options excluded from computation of earnings per share	189,699	'
Options purchase price per diluted share	$10.50	'

Comprehensive_Income_Summary_o

Comprehensive Income - Summary of Amounts Recognized in Other Comprehensive Income Loss (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Available-for-sale securities	'	'	'	'
Realized gain on sale of securities	($58)	'	($525)	'
Provision for income tax expense	20	67	178	158
Available-for-sale securities, Net of tax	-38	'	-347	'
Defined benefit pension plan items	'	'	'	'
Amortization of prior service costs	36	51	108	157
Amortization of actuarial gains/(losses)	10	'	30	'
Defined benefit pension plan items, Total before tax	36	'	108	'
Defined benefit pension plan items, Provision for income tax expense	-12	'	-37	'
Defined benefit pension plan items, Net of tax	24	'	71	'
Total reclassifications	($14)	'	($276)	'

Comprehensive_Income_Summary_o1

Comprehensive Income - Summary of Comprehensive Income Loss (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Amounts Reclassified Out Of Accumulated Other Comprehensive Income Loss [Abstract]	'	'	'	'
Beginning balance, Gains/(losses) on Cash Flow Hedges	'	'	($3,733)	'
Other comprehensive income/(loss) before reclassification, Gains/(losses) on Cash Flow Hedges	'	'	922	'
Amounts reclassified from AOCI, Gains/(losses) on Cash Flow Hedges	'	'	'	'
Fair Value adjustment on derivatives	19	-146	922	-414
Ending balance, Gains/(losses) on Cash Flow Hedges	-2,811	'	-2,811	'
Beginning balance, Unrealized gains/(losses) on available-for-sale securities	'	'	29,464	'
Other comprehensive income/(loss) before reclassification, Unrealized gains/(losses) on available-for-sale securities	-900	6,571	-17,057	9,495
Amounts reclassified from AOCI, Unrealized gains/(losses) on available-for-sale securities	-38	'	-347	'
Net current period OCI, Unrealized gains/(losses) on available-for-sale securities	'	'	-17,404	'
Ending Balance, Unrealized gains/(losses) on available-for-sale securities	12,060	'	12,060	'
Beginning balance, Defined benefit pension plan items	'	'	-628	'
Other comprehensive income/(loss) before reclassification, Defined benefit pension plan items	'	'	'	'
Amounts reclassified from AOCI, Defined benefit pension plan items	'	'	71	'
Net current period OCI, Defined benefit pension plan items	'	'	71	'
Ending balance, Defined benefit pension plan items	-557	'	-557	'
Beginning balance, Total	'	'	25,103	'
Other comprehensive income/(loss) before reclassification, Total	'	'	-16,135	'
Amounts reclassified from AOCI, Total	'	'	-276	'
Net current period OCI, Total	-895	6,328	-16,411	8,631
Ending balance, Total	$8,692	'	$8,692	'

Comprehensive_Income_Schedule_

Comprehensive Income - Schedule of Components of AOCI, Net of Tax (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Amounts Reclassified Out Of Accumulated Other Comprehensive Income Loss [Abstract]	'	'
Net unrealized gain on securities available for sale	$12,060	$29,464
Accumulated loss on effective cash flow hedging derivatives	-2,811	-3,733
Net unrecognized pension cost	-557	-628
Total	$8,692	$25,103

Retirement_Plans_Additional_In

Retirement Plans - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2013
Directors' Retirement Plan [Member]	'
Defined Benefit Plan Disclosure [Line Items]	'
Annual retirement benefit age	'75 years
SERP [Member]	'
Defined Benefit Plan Disclosure [Line Items]	'
Annual retirement benefit age	'65 years
Annual retirement benefit percentage	25.00%
Credited service description	'Twenty or more years
Credited service	'1 year
Number of payments	'Lump sum or ten equal annual payments
Benefit payable upon early retirement	'Age 50 with at least twelve years of service
Service needed to lesser benefit payable upon early retirement	'12 years
Maximum [Member] | Directors' Retirement Plan [Member]	'
Defined Benefit Plan Disclosure [Line Items]	'
Service period to get retirement benefit	'10 years
Retirement benefit calculation ratio	80.00%
Years of service required for ratios	'20 years
Maximum [Member] | SERP [Member]	'
Defined Benefit Plan Disclosure [Line Items]	'
Final average pay multiplied by a ratio	25.00%
Participants credited service under benefit plans	'34 years
Minimum [Member] | Directors' Retirement Plan [Member]	'
Defined Benefit Plan Disclosure [Line Items]	'
Service period to get retirement benefit	'5 years
Retirement benefit calculation ratio	25.00%
Years of service required for ratios	'10 years
Minimum [Member] | SERP [Member]	'
Defined Benefit Plan Disclosure [Line Items]	'
Final average pay multiplied by a ratio	1.25%
Participants credited service under benefit plans	'22 years

Retirement_Plans_Schedule_of_N

Retirement Plans - Schedule of Net Periodic Pension Cost for Retirement Plan (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
SERP [Member]	'	'	'	'
Components of net periodic pension cost	'	'	'	'
Service cost	$25	$20	$75	$60
Interest cost	28	31	84	93
Amortization of unrecognized gains and losses	26	20	78	60
Amortization of prior service cost	10	10	30	30
Net periodic pension cost	89	81	267	243
Directors' Retirement Plan [Member]	'	'	'	'
Components of net periodic pension cost	'	'	'	'
Service cost	1	1	3	3
Interest cost	7	9	21	27
Amortization of prior service cost	'	22	'	67
Net periodic pension cost	$8	$32	$24	$97

Fair_Value_Additional_Informat

Fair Value - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Fair Value Disclosures [Abstract]	'	'	'	'
Credit spreads on Moody's rating	'	'	'45 to 75 basis points	'
Liquidity risk adjustments ranged	'	'	'20 to 55 basis points	'
Liquidity risk adjustments ranged, securities of 15 largest banks	'	'	'20 to 40 basis points	'
Investment in three largest banks	$18,100,000	'	$18,100,000	'
Investment in three largest banks percentage	'	'	49.30%	'
Investment in Floating rate trust preferred securities	'	'	36,800,000	'
Write-downs on REO properties	$6,000	$7,000	$56,000	$368,000

Fair_Value_Assets_and_Liabilit

Fair Value - Assets and Liabilities Reported on Consolidated Statements of Financial Condition at Fair Value on a Recurring Basis (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities available for sale	$1,067,401	$1,110,776
U.S. Sponsored Entities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities available for sale	631,071	649,933
Private Label [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities available for sale	1,956	4,316
Trust Preferred Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities available for sale	38,488	38,027
Municipal Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities available for sale	179,437	190,887
Equity Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities available for sale	1,729	1,818
Corporate Bonds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities available for sale	214,720	225,795
Quoted Prices in Active Markets for Identical Assets or Liabilities (Level I) [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities available for sale	1,729	1,818
Significant Other Observable Inputs (Level II) [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities available for sale	1,028,904	1,072,779
Significant Unobservable Inputs (Level III) [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities available for sale	36,768	36,179
Fair Value, Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities available for sale	1,067,401	1,110,776
Mortgage backed securities	633,027	654,249
Total other assets	638	90
Total other liabilities	4,258	5,743
Fair Value, Measurements, Recurring [Member] | Interest Rate Swaps [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total other liabilities	4,258	5,743
Fair Value, Measurements, Recurring [Member] | Interest Rate Caps [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total other assets	638	90
Fair Value, Measurements, Recurring [Member] | U.S. Sponsored Entities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Mortgage backed securities	631,071	649,933
Fair Value, Measurements, Recurring [Member] | Private Label [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Mortgage backed securities	1,956	4,316
Fair Value, Measurements, Recurring [Member] | Trust Preferred Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities available for sale	38,488	38,027
Fair Value, Measurements, Recurring [Member] | Municipal Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities available for sale	179,437	190,887
Fair Value, Measurements, Recurring [Member] | Equity Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities available for sale	1,729	1,818
Fair Value, Measurements, Recurring [Member] | Corporate Bonds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities available for sale	214,720	225,795
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level I) [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities available for sale	1,729	1,818
Mortgage backed securities	'	'
Total other assets	'	'
Total other liabilities	'	'
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level I) [Member] | Interest Rate Swaps [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total other liabilities	'	'
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level I) [Member] | Interest Rate Caps [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total other assets	'	'
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level I) [Member] | U.S. Sponsored Entities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Mortgage backed securities	'	'
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level I) [Member] | Private Label [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Mortgage backed securities	'	'
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level I) [Member] | Trust Preferred Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities available for sale	'	'
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level I) [Member] | Municipal Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities available for sale	'	'
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level I) [Member] | Equity Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities available for sale	1,729	1,818
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level I) [Member] | Corporate Bonds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities available for sale	'	'
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level II) [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities available for sale	1,028,904	1,072,779
Mortgage backed securities	633,027	654,249
Total other assets	638	90
Total other liabilities	4,258	5,743
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level II) [Member] | Interest Rate Swaps [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total other liabilities	4,258	5,743
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level II) [Member] | Interest Rate Caps [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total other assets	638	90
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level II) [Member] | U.S. Sponsored Entities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Mortgage backed securities	631,071	649,933
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level II) [Member] | Private Label [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Mortgage backed securities	1,956	4,316
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level II) [Member] | Trust Preferred Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities available for sale	1,720	1,848
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level II) [Member] | Municipal Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities available for sale	179,437	190,887
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level II) [Member] | Equity Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities available for sale	'	'
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level II) [Member] | Corporate Bonds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities available for sale	214,720	225,795
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level III) [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities available for sale	36,768	36,179
Mortgage backed securities	'	'
Total other assets	'	'
Total other liabilities	'	'
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level III) [Member] | Interest Rate Swaps [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total other liabilities	'	'
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level III) [Member] | Interest Rate Caps [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total other assets	'	'
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level III) [Member] | U.S. Sponsored Entities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Mortgage backed securities	'	'
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level III) [Member] | Private Label [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Mortgage backed securities	'	'
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level III) [Member] | Trust Preferred Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities available for sale	36,768	36,179
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level III) [Member] | Municipal Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities available for sale	'	'
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level III) [Member] | Equity Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities available for sale	'	'
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level III) [Member] | Corporate Bonds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Securities available for sale	'	'

Fair_Value_Fair_Value_Measurem

Fair Value - Fair Value Measurements Using Significant Unobservable Inputs (Level III) (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Total net realized/unrealized gains (losses) Included in earnings:	'	'	'	'
Interest income on securities	$3	$4	$10	$11
Net realized loss on securities available for sale	'	'	'	-5
Significant Unobservable Inputs (Level III) [Member]	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'
Beginning balance January 1,	36,934	35,604	36,179	35,789
Total net realized/unrealized gains (losses) Included in earnings:	'	'	'	'
Interest income on securities	3	4	10	11
Net realized loss on securities available for sale	'	'	'	-5
Included in other comprehensive income	-169	214	579	27
Transfers in and/or out of Level III	'	'	'	'
Purchases, issuances and settlements	'	'	'	'
Purchases	'	'	'	'
Issuances	'	'	'	'
Sales	'	'	'	'
Settlements	'	'	'	'
Ending balance, September 30	$36,768	$35,822	$36,768	$35,822

Fair_Value_Changes_in_Unrealiz

Fair Value - Changes in Unrealized Gains and Losses Recorded in Earnings for Level III Assets and Liabilities (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Fair Value Assets And Liabilities Measured On Recurring Basis Gain Loss Included In Earnings [Abstract]	'	'	'	'
Interest income on securities	$3	$4	$10	$11
Net realized loss on securities available for sale	'	'	'	-5
Total	$3	$4	$10	$6

Fair_Value_Schedule_of_Fair_Va

Fair Value - Schedule of Fair Value Level III Assets Measured at Fair Value on a Recurring or Non-Recurring Basis (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Valuation Technique	'Appraisal of collateral	'
Impaired Loans [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair Value of Assets	$16,177	$14,740
Valuation Technique	'Discounted Cash Flow	'
Significant Unobservable Inputs	'Remaining term	'
Impaired Loans [Member] | Minimum [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Range/Weighted Average	'0 years	'
Impaired Loans [Member] | Maximum [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Range/Weighted Average	'27 years 2 months 12 days	'
Impaired Loans [Member] | Weighted Average [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Range/Weighted Average	'24 years	'
Servicing Assets [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair Value of Assets	8	14
Valuation Technique	'Discounted Cash Flow	'
Significant Unobservable Inputs	'Remaining term	'
Servicing Assets [Member] | Minimum [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Range/Weighted Average	'2 months 12 days	'
Servicing Assets [Member] | Maximum [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Range/Weighted Average	'18 years	'
Servicing Assets [Member] | Weighted Average [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Range/Weighted Average	'12 years	'
Real Estate Acquired Through Foreclosure [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair Value of Assets	1,977	2,441
Valuation Technique	'Appraisal of collateral (1)	'
Trust Preferred Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair Value of Assets	36,768	36,179
Valuation Technique	'Discounted Cash Flow	'
Trust Preferred Securities Credit Spreads [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Significant Unobservable Inputs	'Credit Spreads	'
Trust Preferred Securities Credit Spreads [Member] | Minimum [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Range/Weighted Average	0.45%	'
Trust Preferred Securities Credit Spreads [Member] | Maximum [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Range/Weighted Average	0.75%	'
Trust Preferred Securities Credit Spreads [Member] | Weighted Average [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Range/Weighted Average	0.63%	'
Trust Preferred Securities Liquidity Risk Adjustments [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Significant Unobservable Inputs	'Liquidity Risk Adjustments	'
Trust Preferred Securities Liquidity Risk Adjustments [Member] | Minimum [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Range/Weighted Average	0.20%	'
Trust Preferred Securities Liquidity Risk Adjustments [Member] | Maximum [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Range/Weighted Average	0.55%	'
Trust Preferred Securities Liquidity Risk Adjustments [Member] | Weighted Average [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Range/Weighted Average	0.36%	'
Trust Preferred Securities Default Rates [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Significant Unobservable Inputs	'Default Rates	'
Trust Preferred Securities Default Rates [Member] | Minimum [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Range/Weighted Average	0.60%	'
Trust Preferred Securities Default Rates [Member] | Maximum [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Range/Weighted Average	1.00%	'
Impaired Loans Discount Rate [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Significant Unobservable Inputs	'Discount Rate	'
Impaired Loans Discount Rate [Member] | Minimum [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Range/Weighted Average	3.63%	'
Impaired Loans Discount Rate [Member] | Maximum [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Range/Weighted Average	16.30%	'
Impaired Loans Discount Rate [Member] | Weighted Average [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Range/Weighted Average	6.42%	'
Impaired Loans Appraisal Adjustment and Liquidation Expense [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Significant Unobservable Inputs	'Appraisal adj and liquidation exp	'
Impaired Loans Appraisal Adjustment and Liquidation Expense [Member] | Minimum [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Range/Weighted Average	2,000	'
Impaired Loans Appraisal Adjustment and Liquidation Expense [Member] | Maximum [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Range/Weighted Average	$500,000	'
Servicing Assets Discount Rate [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Significant Unobservable Inputs	'Discount Rate	'
Servicing Assets Discount Rate [Member] | Minimum [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Range/Weighted Average	11.25%	'
Servicing Assets Discount Rate [Member] | Maximum [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Range/Weighted Average	12.25%	'
Servicing Assets Discount Rate [Member] | Weighted Average [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Range/Weighted Average	11.51%	'

Financial_Instruments_Carrying

Financial Instruments - Carrying Amount and Fair Value of the Company's Financial Instruments (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Financial Assets:	'	'
Securities	$1,067,401	$1,110,776
Securities receivable	1,319	1,277
Loans receivable and held for sale	683,704	672,086
Accrued interest receivable	7,582	8,068
FHLB Stock	13,655	15,077
Bank owned life insurance	30,460	30,025
Financial Liabilities:	'	'
Deposits	1,232,434	1,178,057
Junior subordinated notes	36,083	46,393
Advance payments by borrowers for taxes and insurance	1,503	2,619
Carrying Amount [Member]	'	'
Financial Assets:	'	'
Cash and Cash Equivalents	19,839	15,064
Securities	1,067,401	1,110,776
Securities receivable	1,319	1,277
Loans receivable and held for sale	683,704	672,086
Accrued interest receivable	7,582	8,068
FHLB Stock	13,655	15,077
Bank owned life insurance	30,460	30,025
Interest rate cap contracts	638	90
Financial Liabilities:	'	'
Deposits	1,232,434	1,178,057
Borrowed funds	422,270	484,556
Junior subordinated notes	36,083	46,393
Advance payments by borrowers for taxes and insurance	1,503	2,619
Accrued interest payable	2,654	1,344
Interest rate swap contracts	4,258	5,743
Fair Value [Member]	'	'
Financial Assets:	'	'
Cash and Cash Equivalents	19,839	15,064
Securities	1,067,401	1,110,776
Securities receivable	1,319	1,277
Loans receivable and held for sale	699,504	702,206
Accrued interest receivable	7,582	8,068
FHLB Stock	13,655	15,077
Bank owned life insurance	30,460	30,025
Interest rate cap contracts	638	90
Financial Liabilities:	'	'
Deposits	1,239,614	1,187,728
Borrowed funds	438,482	509,883
Junior subordinated notes	24,176	25,001
Advance payments by borrowers for taxes and insurance	1,503	2,619
Accrued interest payable	2,654	1,344
Interest rate swap contracts	4,258	5,743
Quoted Prices in Active Markets for Identical Assets or Liabilities (Level I) [Member]	'	'
Financial Assets:	'	'
Cash and Cash Equivalents	19,839	15,064
Securities	1,729	1,818
Securities receivable	1,319	1,277
Loans receivable and held for sale	'	'
Accrued interest receivable	7,582	8,068
FHLB Stock	13,655	15,077
Bank owned life insurance	30,460	30,025
Interest rate cap contracts	'	'
Financial Liabilities:	'	'
Deposits	593,365	546,298
Borrowed funds	'	'
Junior subordinated notes	'	'
Advance payments by borrowers for taxes and insurance	1,503	2,619
Accrued interest payable	2,654	1,344
Interest rate swap contracts	'	'
Significant Other Observable Inputs (Level II) [Member]	'	'
Financial Assets:	'	'
Cash and Cash Equivalents	'	'
Securities	1,028,904	1,072,779
Securities receivable	'	'
Loans receivable and held for sale	'	'
Accrued interest receivable	'	'
FHLB Stock	'	'
Bank owned life insurance	'	'
Interest rate cap contracts	638	90
Financial Liabilities:	'	'
Deposits	0	'
Borrowed funds	173,535	260,333
Junior subordinated notes	24,176	25,001
Advance payments by borrowers for taxes and insurance	'	'
Accrued interest payable	'	'
Interest rate swap contracts	4,258	5,743
Significant Unobservable Inputs (Level III) [Member]	'	'
Financial Assets:	'	'
Cash and Cash Equivalents	'	'
Securities	36,768	36,179
Securities receivable	'	'
Loans receivable and held for sale	699,504	702,206
Accrued interest receivable	'	'
FHLB Stock	'	'
Bank owned life insurance	'	'
Interest rate cap contracts	'	'
Financial Liabilities:	'	'
Deposits	646,249	641,430
Borrowed funds	264,947	249,550
Junior subordinated notes	'	'
Advance payments by borrowers for taxes and insurance	'	'
Accrued interest payable	'	'
Interest rate swap contracts	'	'