Retirement Plan	12 Months Ended
Dec. 31, 2012
Retirement Plan
Retirement Plan	21. Retirement Plan On May 31, 2002, the Company established a 401(k) defined contribution savings plan for its employees who meet certain service period and age requirements. Contributions are permitted up to the maximum allowed under the Internal Revenue Code of each covered employee's salary. The savings plan permits the Company to contribute at its discretion. For the years ended December 31, 2010, 2011 and 2012, the Company made contributions of $380,000, $487,000 and $581,000, respectively, to the plan.

Retirement Plan

12 Months Ended

Dec. 31, 2012

21. Retirement Plan

On May 31, 2002, the Company established a 401(k) defined contribution savings plan for its employees who meet certain service period and age requirements. Contributions are permitted up to the maximum allowed under the Internal Revenue Code of each covered employee's salary. The savings plan permits the Company to contribute at its discretion. For the years ended December 31, 2010, 2011 and 2012, the Company made contributions of $380,000, $487,000 and $581,000, respectively, to the plan.