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EMPLOYEE RETIREMENT PLAN
12 Months Ended
Dec. 31, 2012
Compensation and Retirement Disclosure [Abstract]  
EMPLOYEE RETIREMENT PLAN
13.
EMPLOYEE RETIREMENT PLAN
 
We sponsor a defined contribution retirement savings plan that qualifies under Section 401(k) of the Internal Revenue Code. Plan participants may elect to have a portion of their pre-tax compensation contributed to the plan, subject to certain guidelines issued by the Internal Revenue Service. Employer contributions are discretionary and were $0.7 million, $0.7 million and $0.8 million during the years ended December 31, 2012, 2011 and 2010, respectively.