Common Stock Repurchase Programs - Additional Information (Detail) - USD ($)	3 Months Ended	9 Months Ended		12 Months Ended
	Mar. 27, 2016	Oct. 01, 2017	Sep. 25, 2016	Dec. 31, 2016	Dec. 27, 2015	Jan. 31, 2016	Oct. 14, 2014
Equity, Class of Treasury Stock [Line Items]
Cost of share repurchases		$ 5,014,000	$ 13,527,000
2014 Share Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Amount authorized to be repurchased							$ 30,000,000
Shares repurchased	585,970				1,056,954
Cost of share repurchases	$ 10,300,000				$ 19,600,000
2016 Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Amount authorized to be repurchased						$ 50,000,000
Shares repurchased		215,841		454,718
Cost of share repurchases		$ 5,000,000		$ 10,400,000