Composition of Certain Financial Statement Captions - Schedule of Compensation and Other Employee Benefits (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 27, 2015
Dec. 31, 2014
Compensation and Other Employee Benefits    
Accrued salaries and wages $ 14,081 $ 13,919
Accrued bonus 1,336 4,528
Accrued employee benefits 17,770 18,133
Total $ 33,187 $ 36,580