Stock-Based Compensation - Additional Information (Detail) (USD $)	9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized number of common stock shares for grant	2,000,000
Date of plan approval	May 20, 2009
Maximum grant period from date of plan approval	10 years
Shares available for grant under the plan	1,703,326
Compensation cost charged against income for stock options	$ 119,000	$ 151,000
Capitalized compensation cost	0	0
Percentage of forfeiture assumption in calculation of compensation cost	5.40%	5.40%
Intrinsic value of stock options exercised	2,900,000
Unrecognized compensation cost related to nonvested stock options	300,000
Unrecognized compensation cost related to nonvested stock options, weighted-average period	2 years 7 months 6 days
Cash received from option exercises under the plan	503,000	1,388,000
Tax benefit generated from compensation cost and credited to additional paid in capital	800,000	2,400,000
Restricted stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to nonvested stock options	2,400,000
Unrecognized compensation cost related to nonvested stock options, weighted-average period	2 years 10 months 24 days
Tax benefit generated from compensation cost and credited to additional paid in capital	300,000
Compensation cost related to restricted stock	$ 650,000	$ 599,000