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Stockholders' Equity - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended		1 Months Ended	0 Months Ended
	Jan. 30, 2014	Mar. 31, 2014	Mar. 31, 2013	Feb. 28, 2014 Series M [Member]	Mar. 25, 2014 Former Board of Directors Chairman [Member]	Jan. 02, 2014 Former Board of Directors Chairman [Member]
Equity [Line Items]
Aggregate common stock shares to repurchase					550,000	675,000
Repurchase Price					$ 13.16	$ 11.11
Number of convertible preferred stock				8,000
Number of preferred stock converted into common stock				40,000
Preferred stock conversion factor				5
Dividends per share declared on outstanding common stock	$ 0.10	$ 0.10	$ 0.08
Dividends payable date		Mar. 03, 2014
Dividends payable, shareholders record date		Feb. 19, 2014

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Aggregate dividends declared during the period for each share of common stock outstanding.

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The number of shares converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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Date the dividend to be paid was declared, in CCYY-MM-DD format.

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Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format.

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Number of shares issued during the period as a result of the conversion of convertible securities.

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Total cost of shares repurchased divided by the total number of shares repurchased.

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