Revenue Recognition - Contract Balances (Details) - USD ($) $ in Thousands		12 Months Ended
Jan. 01, 2018	Dec. 29, 2019	Dec. 30, 2018
Revenue disaggregation
Cumulative effect of adoption of Topic 606	$ (24,359)
Revenue recognized related to deferred revenue and customer loyalty program		$ 34,000	$ 16,300
Contract liabilities		32,395	41,291
Change		(8,896)
Contract assets		6,000	6,600
Amortization expense related to contract assets		3,500	4,000
Deferred revenue.
Revenue disaggregation
Contract liabilities		20,346	23,272
Change		(2,926)
Customer loyalty program
Revenue disaggregation
Contract liabilities		12,049	$ 18,019
Change		$ (5,970)
As reported
Revenue disaggregation
Cumulative effect of adoption of Topic 606	$ (21,527)

Amount of amortization expense for asset recognized from cost incurred to obtain or fulfill contract with customer.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 340
-SubTopic 40
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=68051541&loc=SL49131252-203054

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Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

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Amount of the cumulative effect on retained earnings net of related income tax effect.

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Amount of increase (decrease) in obligation to transfer good or service to customer for which consideration has been received or is receivable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
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