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401(k) Plan
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12 Months Ended | ||
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Dec. 31, 2011
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| 401(k) Plan [Abstract] | |||
| 401(k) Plan |
The Company maintains a 401(k) defined contribution plan that covers all eligible U.S employees. Under this plan, the Company matches 100% of the first 6% contributed by an employee. Vesting on contributions made by the Company is immediate. Total expenses for the plan were $1.1 million, $1.6 million, and $1.4 million for the years ended December 31, 2011, 2010, and 2009, respectively. |