Schedule II - Valuation and Qualifying Accounts and Reserve (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Allowance for Doubtful Accounts [Member]
Balance at beginning of year		$ 2,079	$ 319	$ 278
Charged to costs and expenses	[1]	3,068	1,769	164
Deductions	[2]	(4,070)	(42)	150
Charged to other accounts	[3]	95	33	27
Balance at end of year		1,172	2,079	319
Reserve for Cash Discount [Member]
Balance at beginning of year		23,825	17,168	19,140
Charged to costs and expenses	[1]	106,781	91,632	81,335
Deductions	[2]	(104,941)	(90,837)	82,997
Charged to other accounts	[3]	679	5,862	(310)
Balance at end of year		26,344	23,825	17,168
Valuation Allowance of Deferred Tax Assets [Member]
Balance at beginning of year		6,738	4,557	4,557
Charged to costs and expenses	[1]
Deductions	[2]
Charged to other accounts	[3]	(535)	2,181
Balance at end of year		$ 6,203	$ 6,738	$ 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, U.S. and non-U.S. subsidiary tax attributes and foreign currency translation adjustments.