Schedule II - Valuation and Qualifying Accounts and Reserve (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Jan. 02, 2016	Dec. 27, 2014
Allowance for Doubtful Accounts [Member]
Balance at beginning of year		$ 319	$ 278	$ 790
Charged to costs and expenses	[1]	1,769	164	130
Deductions	[2]	42	150	656
Charged to other accounts	[3]	33	27	14
Balance at end of year		2,079	319	278
Reserve for Cash Discount [Member]
Balance at beginning of year		17,168	19,140	16,117
Charged to costs and expenses	[1]	91,632	81,335	85,825
Deductions	[2]	90,837	82,997	82,568
Charged to other accounts	[3]	5,862	(310)	(234)
Balance at end of year		23,825	17,168	19,140
Valuation Allowance of Deferred Tax Assets [Member]
Balance at beginning of year		4,557	4,557	6,250
Charged to costs and expenses	[1]
Deductions	[2]			1,693
Charged to other accounts	[3]	2,181
Balance at end of year		$ 6,738	$ 4,557	$ 4,557

[1] Includes provision for doubtful accounts, sales returns and sales discounts granted to customers.

[2] Represents uncollectible accounts written off, net of recoveries and credits issued to customers and the write-off of certain deferred tax assets that previously had full valuation allowances.

[3] Represents business acquisitions, foreign subsidiary tax attributes and foreign currency translation adjustments.