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401(k) Retirement Plan	12 Months Ended
401(k) Retirement Plan	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
401(k) Retirement Plan	401(k) Retirement Plan The Company sponsors a 401(k) retirement plan for all eligible employees. For the years ended December 31, 2014, 2013 and 2012, the Company recorded compensation expense of $3.5 million, $3.7 million and $3.7 million, respectively, representing matching contributions for plan participants. In accordance with the safe harbor matching provisions of the plan, the Company matches plan participant contributions in cash as bi-weekly deductions are made.