Commitments and Contingencies - Summary of Future Minimum Rental Payments under Operating Leases (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013
Commitments and Contingencies Disclosure [Abstract]
Rental expense under operating leases	$ 1,200,000	$ 1,400,000	$ 2,300,000	$ 2,400,000
Disclosure Summary Of Future Minimum Rental Payments Under Operating Leases [Abstract]
Remainder of 2013	1,778,000		1,778,000
2014	3,511,000		3,511,000
2015	2,674,000		2,674,000
2016	2,383,000		2,383,000
2017	2,383,000		2,383,000
Thereafter	3,177,000		3,177,000
Total minimum lease payments	$ 15,906,000		$ 15,906,000