Schedule II - Valuation and Qualifying Accounts and Reserves (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 03, 2016	Dec. 28, 2014	Dec. 29, 2013
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of year	$ 1,330	$ 1,401	$ 1,490
Additions charged to costs and expenses	1,234	550	151
Deductions	447	621	240
Balance at end of year	2,117	1,330	1,401
Deferred Income Tax Valuation Allowance [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of year	3,640	3,553	3,231
Additions charged to costs and expenses	28	1,203	398
Additions charged to other	0	7	0
Deductions credited to expense	1,361	0	74
Deductions	0	1,123	2
Balance at end of year	$ 2,307	$ 3,640	$ 3,553