Income Taxes - Income Tax Expense (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 30, 2018	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Dec. 31, 2017	Sep. 24, 2017	Jun. 25, 2017	Mar. 26, 2017	Dec. 30, 2018	Dec. 31, 2017	Dec. 25, 2016
Current tax expense/(benefit)
Federal									$ 31,719	$ (252)	$ 22,864
Foreign									705	458	312
State and local									10,172	350	(3,295)
Total current tax expense									42,596	556	19,881
Deferred tax expense
Federal									913	105,905	(16,625)
State and local									5,122	(2,505)	1,165
Total deferred tax expense/(benefit)									6,035	103,400	(15,460)
Income tax expense/(benefit)	$ 23,289	$ 10,092	$ 9,999	$ 5,251	$ 63,083	$ 23,420	$ 6,711	$ 10,742	48,631	103,956	$ 4,421
Operating loss carryforward, state and local	$ 2,000				$ 4,700				$ 2,000	$ 4,700
Maximum [Member]
Deferred tax expense
Operating loss carryforwards, remaining life									19