Accrued Liabilities (Detail) - USD ($) $ in Thousands	Jul. 04, 2015	Dec. 31, 2014	Jun. 28, 2014
Payables and Accruals [Abstract]
Accrued compensation	$ 17,307	$ 25,352
Accrued income and sales tax	1,306	1,580
Customer deposits	1,015	1,139
Interest payable	9,032	9,439
Provision for forward loss reserves	4,762	4,734
Other	8,479	9,822
Total	$ 41,901	$ 52,066	$ 51,562