Summary of Significant Accounting Policies - Recently Issued Accounting Pronouncements (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 23, 2019	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017	Jan. 02, 2016	Dec. 30, 2018	Jan. 01, 2018	Jan. 01, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use assets		$ 89,525
Lease liabilities		82,783
Revenue recognized previously included in contract liabilities		300
Excess tax benefits		(369)	$ (331)	$ (412)
Adjustment from adopting new ASC							$ (268)	$ 1,009
Share repurchases to satisfy tax withholding obligations		1,428	$ 1,030	355
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustment from adopting new ASC							$ (268)	$ 1,009
ASU 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use assets						$ 63,300
Lease liabilities						$ 63,300
Revenue recognized previously included in contract liabilities	$ 2,200
ASU 2016-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Excess tax benefits		$ 2,500
Deferred tax assets				1,000
ASU 2016-09 | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustment from adopting new ASC				$ 1,000
ASU 2016-09, Statutory Tax Withholding Component
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Share repurchases to satisfy tax withholding obligations					$ 131,000