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Consolidated Statements of Stockholders' Equity (Parenthetical)	12 Months Ended
	Dec. 31, 2010
Common stock, repurchase of shares	3,589,201
Common Stock
Common stock, repurchase of shares	3,589,201
Additional Paid-in Capital
Common stock, repurchase of shares	3,589,201

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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