Income Taxes - Narrative (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 30, 2017	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Income Tax Examination [Line Items]
Deferred income tax liabilities, net		$ 53,341,000	$ 16,224,000
Deferred tax liabilities noncurrent		$ 43,151,000	$ 8,903,000
Effective income tax rate		35.00%	21.00%
Income tax expense (benefit)	$ (6,249,000)
Provisional liability transition tax	357,000			$ 357,000
Provisional liability transition tax adjustment amount	110,000			$ 110,000
Effective income tax rate percent		17.80%	20.40%	2.50%
Decrease resulting from settlements with taxing authorities		$ 0	$ 0	$ 839,000
Unrecognized tax benefits	437,000	887,000	548,000	$ 437,000	$ 770,000
Unrecognized tax benefits that would impact effective tax rate		769,000	$ 548,000
Income tax penalties and interest accrued		$ 204
State and Local Jurisdiction | California Franchise Tax Board
Income Tax Examination [Line Items]
Decrease resulting from settlements with taxing authorities	$ 839,000