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401(k) Plan
12 Months Ended
Dec. 31, 2014
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract]  
401(k) Plan
401(k) Plan
 
The Company has a 401(k) benefit plan (the “Plan”) for all eligible employees. Employee contributions are limited by the maximum allowed under Section 401(k) of the Internal Revenue Code.  The Company matches 50% of the employee contributions up to a specified maximum.  Company contributions to the Plan were approximately $0.9 million, $0.7 million, and $0.6 million for the years ended December 31, 2014, 2013, and 2012, respectively.