Treasury Stock - Additional Information (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2016	Oct. 02, 2015	Oct. 19, 2016	Oct. 21, 2015	May 29, 2014
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Authorized Amount				$ 35,000,000	$ 35,000,000
Purchase of treasury shares (in shares)	491,312	463,402
Repurchase of treasury shares	$ 24,456,000	$ 19,814,000
Remaining authorized amount for repurchase of common stock	22,307,000
Treasury stock reissued at lower than repurchase price	$ 5,791,000	$ 4,943,000
Subsequent Event [Member]
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Authorized Amount			$ 35,000,000
Remaining authorized amount for repurchase of common stock			$ 57,307,000