Fair value of restricted stock granted based on the Corporation's outstanding common stock on the date of the grant.

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Assumption used for the fair value of restricted shares granted under TARP requirements. Holding period by the U.S. Treasury of its outstanding common stock of the Corporation.

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Additional restiction for vesting of restricted stock. The stock that has otherwise vested for the passage of time may not become transferable at any time earlier than as permitted under the schedule set forth by TARP, which is based on the repayment in 25% increments of the aggregate financial assistance received from the U.S. Department of Treasury.

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For purpose of comupting the discount, the Corporation estimated a percentage in the value of the common stock and assumed a holding period.

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Percentage of share vest during period.

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Remaining percentage of share vest during period.

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Percentage of restricted stock vested during the period that was previously subject to tarp requirements.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards.

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Value of stock related to Restricted Stock Awards forfeited during the period.

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Number of shares that have been repurchased during the period and are being held in treasury.

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STOCK-BASED COMPENSATION - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Apr. 29, 2008
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted shares of restricted stock	821,532
Restricted stock granted to Board of Directors	(63,750)
Stock based compensation expense unrecognized related to nonvested shares of restricted stock	$ 6,000,000
Period for cost recognition not yet recognized	2 years 3 months 18 days
Weighted-Average Grant Date Fair Value of Stocks	$ 3.92
Holding Period By The Us Treasury Of Outstanding Common Stock	1 year 0 months 0 days	2 years 0 months 0 days
Repurchased of common stock	50,708us-gaap_TreasuryStockSharesAcquired
Stock Issued During Period Value Restricted Stock Award Forfeitures	26,000	5,000
Restricted Stock Vested Subject To Tarp Percentage		25.00%
Board Of Directors [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted shares of restricted stock	30,068
Maximum [Member] \| Board Of Directors [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock vesting period		5 years 0 months 0 days
Minimum [Member] \| Board Of Directors [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock vesting period		1 year 0 months 0 days
Senior Executives
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted shares	80,234
Share based compensation cost	400,000
Weighted-Average Grant Date Fair Value of Stocks	$ 6.02
Repurchased of common stock	28,183
Management [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted shares of restricted stock	791,464
Omnibus Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Authorized granting up shares			8,169,807
Troubled Asset Relief Program [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage increments repayment under TARP		25.00%
Percentage of appreciation	14.00%
Troubled Asset Relief Program [Member] \| Management [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Fair Value Of Restricted Stock Granted	$ 3.18
Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation cost	$ 1,000,000	$ 400,000
Repurchased of common stock	22,525
First Fifty Percentage Restricted Stock Nonvest Awards [Member] \| Management [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock vesting period	2 years 0 months 0 days	2 years 0 months 0 days
Other Fifty Percentage Restricted Stock Nonvest Awards [Member] \| Management [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock vesting period	3 years 0 months 0 days	3 years 0 months 0 days
Three Months Requisite Service Period [Member] \| Management [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted shares of restricted stock	40,000
After Two To Three Years Vesting Period [Member] \| Management [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of Share vest during period	50.00%	50.00%
Remaining percentage of share vest during period	50.00%	50.00%
Granted shares of restricted stock	751,464	810,138
After Two To Three Years Vesting Period [Member] \| Troubled Asset Relief Program [Member] \| Management [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted shares of restricted stock	615,464	653,138
Fair Value Of Restricted Stock Granted		$ 2.63
Percentage of appreciation		16.00%
Granted Shares With One Year Vesting Period [Member] \| Board Of Directors [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted shares of restricted stock	4,295
Granted Shares With Five Year Vesting Period [Member] \| Board Of Directors [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted shares of restricted stock	25,773