Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 24, 2020	Jun. 26, 2019	Jun. 24, 2020	Jun. 26, 2019	Dec. 25, 2019
Leases [Abstract]
Finance leases	$ 5,248	$ 5,444	$ 5,248	$ 5,444
Operating leases	298,602	274,426	298,602	274,426	$ 274,426
Total right-of-use assets	303,850	279,870	303,850	279,870
Other current liabilities, finance leases	1,802	1,873	1,802	1,873
Other long-term liabilities, finance leases	3,559	3,643	3,559	3,643
Operating lease liabilities, current	37,082	30,002	37,082	30,002	30,002
Long-term operating lease liabilities	332,751	304,914	332,751	304,914	$ 304,914
Finance leases	5,361		5,361
Operating leases	369,833		369,833
Total lease liabilities	375,194	340,432	375,194	340,432
Finance lease cost:
Amortization of right-of-use assets	602	619	1,179	953
Interest on lease liabilities	55	55	110	96
Operating lease cost	11,478	9,855	22,220	18,765
Short-term lease cost	69	17	193	34
Variable lease cost	4,087	3,836	7,817	7,298
Total lease cost	$ 16,291	$ 14,382	$ 31,519	27,146
Weighted Average Lease Term [Abstract]
Finance leases	5 years 1 month 6 days		5 years 1 month 6 days		5 years 1 month 6 days
Operating leases	10 years 1 month 6 days		10 years 1 month 6 days		10 years 1 month 6 days
Weighted Average Discount Rate [Abstract]
Finance leases	3.60%		3.60%		3.70%
Operating leases	4.00%		4.00%		5.40%
Operating cash flows from finance leases			$ 110	148
Operating cash flows from operating leases			15,799	27,238
Financing cash flows from finance leases			1,150	1,433
Finance leases			1,020	1,927
Operating leases			$ 30,982	$ 65,773