Capital Transactions - Additional Information (Detail) $ / shares in Units, $ in Thousands				12 Months Ended
	Mar. 08, 2016 shares	Mar. 03, 2015 shares	Mar. 04, 2014 shares	Jan. 03, 2016 USD ($) Vote Stock $ / shares shares	Dec. 28, 2014 USD ($) $ / shares shares	Dec. 29, 2013 USD ($) $ / shares shares	Dec. 31, 2015 $ / shares	Dec. 26, 2014 $ / shares	Dec. 27, 2013 $ / shares
Schedule of Capitalization, Equity [Line Items]
Number of classes of common stock outstanding | Stock				2
Dividend is declared and paid on the Common Stock | $ / shares				$ 1.00	$ 1.00	$ 1.00
Payment of dividend | $				$ 9,287	$ 9,266	$ 9,245
Number of votes per share | Vote				1
Performance Unit Award Agreement expense recognized | $				$ 7,300	$ 3,542	$ 2,919
Share price | $ / shares							$ 182.51	$ 88.55	$ 72.98
Increase in total number of shares outstanding				20,920	20,900	20,120
Class B Common Stock [Member]
Schedule of Capitalization, Equity [Line Items]
Dividend is declared and paid on the Common Stock | $ / shares				$ 1.00	$ 1.00	$ 1.00
Number of votes per share | Vote				20
Performance units awarded		40,000	40,000
Performance units awards settled in cash				19,080	19,100
Increase in total number of shares outstanding				20,920	20,900	20,120
Class B Common Stock [Member] | Subsequent Event [Member]
Schedule of Capitalization, Equity [Line Items]
Performance units awarded	40,000
Performance units awards settled in cash	19,080