Revenue Recognition - Contract Balances (Details) - USD ($)		3 Months Ended		9 Months Ended
	Jan. 01, 2018	Sep. 29, 2019	Sep. 30, 2018	Sep. 29, 2019	Sep. 30, 2018	Dec. 30, 2018
Revenue, Major Customer [Line Items]
Cumulative effect of adoption of Topic 606	$ (24,359,000)
Revenue recognized related to deferred revenue and customer loyalty program		$ 9,000,000.0	$ 3,600,000	$ 24,700,000	$ 10,900,000
Contract liabilities		33,712,000		33,712,000		$ 41,291,000
Change				(7,579,000)
Contract assets		5,800,000		5,800,000		6,600,000
Amortization expense related to contract assets		900,000		2,500,000
Deferred revenue.
Revenue, Major Customer [Line Items]
Contract liabilities		19,132,000		19,132,000		23,272,000
Change				(4,140,000)
Customer loyalty program
Revenue, Major Customer [Line Items]
Contract liabilities		$ 14,580,000		14,580,000		$ 18,019,000
Change				$ (3,439,000)
As reported
Revenue, Major Customer [Line Items]
Cumulative effect of adoption of Topic 606	$ (21,528,000)