Supplemental Disclosure of Cash Flow Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2016	Jan. 01, 2016	Jan. 02, 2015
Cash paid during the year:
Income taxes	$ 22,280	$ 24,651	$ 27,421
Non-cash investing and financing activities:
Unrealized gain (loss) on Investments	(81)	(79)	4
Vested stock unit awards granted to settle accrued bonus	6,334	6,169	6,008
Accrual for capital expenditures	$ 284	$ 321	$ 0