Capital Transactions - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended		6 Months Ended
	Mar. 08, 2016	Mar. 03, 2015	Apr. 03, 2016	Mar. 29, 2015	Jul. 03, 2016	Jun. 28, 2015	Jul. 01, 2016	Jun. 26, 2015
Schedule of Capitalization, Equity [Line Items]
Performance Unit Award Agreement expense recognized					$ 2,896	$ 2,980
Share price							$ 144.82	$ 148.98
Class B Common Stock [Member]
Schedule of Capitalization, Equity [Line Items]
Performance units awarded	40,000	40,000
Performance units awards settled in cash	19,080	19,080
Increase in total number of shares outstanding			20,920	20,920	20,920	20,920