Composition of Certain Financial Statement Captions - Schedule of Other Accrued Liabilities (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 27, 2015
Dec. 31, 2014
Other Accrued Liabilities    
Workers' compensation, auto and general liability reserve $ 9,591 $ 9,637
Exelis indemnified receivable obligation 10,281 11,411
Insurance financing 14,857 0
Accrued liabilities 17,427 16,025
Total $ 52,156 $ 37,073