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Share Repurchase - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended	1 Months Ended
	Jan. 28, 2012	Jun. 06, 2012 Maximum	Aug. 17, 2011 Maximum
Stockholders Equity Note [Line Items]
Stock repurchase authorized amount		$ 15	$ 25
Stock repurchased during period, shares	3,212,628
Stock repurchased during period, value	$ 25
Stock repurchased during period, price per share	$ 7.78

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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- Definition

Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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