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Subsequent Event	3 Months Ended
	Mar. 31, 2012
Subsequent Event [Abstract]
Subsequent Event	14. Subsequent Event On April 20, 2012, a total of 295,439 RSUs vested with 114,345 RSUs withheld through net share settlement by the Company to settle employee tax withholding obligations. The Company paid $9.1 million in employee tax withholding obligations related to the RSUs withheld. These net share settlements had the effect of share repurchases by the Company as they reduced the number of shares that would have been otherwise issued as a result of the vesting.

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The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

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