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Treasury Stock (Details) (USD $) In Millions, except Share data	3 Months Ended
	Jun. 30, 2011	Jul. 26, 2006	Sep. 17, 2001
Stock authorized to repurchase under stock repurchase program		4,000,000	1,000,000
Additional stock authorized to repurchase under stock repurchase program		3,000,000
Share repurchased during the period	486,794
Restricted Stock [Member]
Share repurchased during the period	68,821
Share repurchased during the period, value	$ 1.4

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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