Long-Term Debt - Additional information (Detail) (USD $)	3 Months Ended				6 Months Ended
	Jun. 28, 2014	Mar. 29, 2014	Jun. 29, 2013	Mar. 30, 2013	Jun. 28, 2014	Jun. 29, 2013
Debt Instrument [Line Items]
Principal pre-payment amount					$ 15,012,000	$ 15,012,000
Remaining borrowing capacity	58,400,000				58,400,000
Outstanding standby letters of credit	1,600,000				1,600,000
Covenant trigger, letter of credit amount drawn maximum	1,000,000				1,000,000
Covenant trigger, letter of credit, aggregate amount outstanding, maximum	5,000,000				5,000,000
Fair value debt	222,000,000				222,000,000
Voluntary Principal Pre-Payments
Debt Instrument [Line Items]
Principal pre-payment amount	$ 7,500,000	$ 7,500,000	$ 7,500,000	$ 7,500,000	$ 15,000,000	$ 15,000,000