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Stockholders' Equity 2 Narrative (Details)	12 Months Ended
Stockholders' Equity 2 Narrative (Details)	Dec. 31, 2011
Stockholders equity [Abstract]
Stock-based Compensation Arrangement by Stock-based Payment Award, Maximum Number of Shares Per Employee	500,000
Minimum Percent Grant Date Fair Value	100.00%
Stock-based Compensation Arrangement by Stock-based Payment Award, Number of Shares Authorized	8,491,540
Award Expiration Period	ten years

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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