Accounting For Stock-Based Compensation	3 Months Ended
Accounting For Stock-Based Compensation	Mar. 31, 2012
Accounting For Stock-Based Compensation [Abstract]
Accounting For Stock-Based Compensation	Note 6. Accounting for Stock-Based Compensation The Company recognized stock-based compensation expense of $1.8 million for the three months ended March 31, 2012, and $1.2 million for the three months ended March 31, 2011. Unrecognized compensation expense of $24.8 million as of March 31, 2012, related to unvested stock-based compensation agreements, will be recognized over a weighted-average period of three years. For the three months ended March 31, 2012, the Company granted approximately 0.5 million shares in the form of equity compensation. As of March 31, 2012, the Company had approximately 1.0 million shares available to grant under its equity compensation plan.

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

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