Schedule II - Valuation and Qualifying Accounts and Reserves (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Allowance for losses on accounts receivable
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	$ 1,172	$ 2,079	$ 319
Charged to Costs and Expenses	319	3,068	1,769
Deductions	(557)	(4,070)	(42)
Other	128	95	33
Balance at End of Year	1,062	1,172	2,079
Reserves for sales discounts and allowances
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	26,344	23,825	17,168
Charged to Costs and Expenses	124,638	106,781	91,632
Deductions	(118,438)	(104,941)	(90,837)
Other	2,432	679	5,862
Balance at End of Year	$ 34,976	$ 26,344	$ 23,825