Capital Transactions - Additional Information (Detail) $ / shares in Units, $ in Thousands	12 Months Ended
	Jan. 01, 2017 USD ($) Vote Stock $ / shares	Jan. 03, 2016 USD ($) $ / shares	Dec. 28, 2014 USD ($) $ / 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
Cash dividends paid | $	$ (9,307)	$ (9,287)	$ (9,266)
Number of votes per share | Vote	1
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