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Subsequent Event (Details Textual) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended
	Mar. 31, 2013	Feb. 25, 2013	Apr. 30, 2012	Jul. 31, 2011	Mar. 31, 2011	Mar. 07, 2013 Repurchase of Equity [Member]
Subsequent Event (Textual) [Abstract]
Purchase price per share						$ 7.51
Stock repurchase program authorized by BOD		$ 25.0	$ 20.0	$ 20.0	$ 12.5
Shares repurchase under stock repurchase program, Shares	600,000
Shares repurchase under stock repurchase program, Value	$ 4.5

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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