Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 25, 2020	Mar. 27, 2019	Dec. 25, 2019
Leases [Abstract]
Finance leases	$ 5,546	$ 5,444
Operating leases	302,216	274,426	$ 274,426
Total right-of-use assets	307,762	279,870
Other current liabilities, finance leases	1,876	1,873
Other long-term liabilities, finance leases	3,772	3,643
Operating lease liabilities, current	43,197	30,002	30,002
Long-term operating lease liabilities	322,191	304,914	$ 304,914
Finance leases	5,648
Operating leases	365,388
Total lease liabilities	371,036	340,432
Finance lease cost:
Amortization of right-of-use assets	577	334
Interest on lease liabilities	55	41
Operating lease cost	10,742	8,910
Short-term lease cost	124	17
Variable lease cost	3,730	3,462
Total lease cost	$ 15,228	12,764
Weighted Average Lease Term [Abstract]
Finance leases	5 years 2 months 12 days		5 years 1 month 6 days
Operating leases	10 years 1 month 6 days		10 years 1 month 6 days
Weighted Average Discount Rate [Abstract]
Finance leases	3.60%		3.70%
Operating leases	4.20%		5.40%
Operating cash flows from finance leases	$ 55	41
Operating cash flows from operating leases	11,329	8,324
Financing cash flows from finance leases	559	339
Right-of-use assets obtained in exchange for new finance lease liabilities	716	230
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 28,035	$ 14,789