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Profit Sharing and 401(k) Plan	12 Months Ended
Profit Sharing and 401(k) Plan	Dec. 31, 2011
Profit Sharing and 401 (k) Plan [Abstract]
Employee Benefit Plans	(11) Profit Sharing and 401(k) Plan Under our profit sharing and 401(k) plan, eligible employees may defer up to 50% of their compensation on a pre-tax basis, subject to Internal Revenue Service limitations. Each year, we may make a discretionary contribution equal to a percentage of the employee's contribution. There was no contribution during 2009. During 2011 and 2010, our contributions, net of forfeitures, were $1.8 million and $1.0 million, respectively.

The entire disclosure for pension and other postretirement benefits.

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