Lease Maturity (Details) - USD ($) $ in Thousands	Jun. 26, 2019	Dec. 27, 2018	Dec. 26, 2018
Leases Maturity [Abstract]
Finance Lease Payments, Remainder of 2019	$ 3,554
Finance Lease Payments, 2020	6,625
Finance Lease Payments, 2021	6,101
Finance Lease Payments, 2022	5,836
Finance Lease Payments, 2023	5,149
Finance Lease Payments, Thereafter	29,974
Finance Lease Payments, Total Undiscounted Cash Flows	57,239
Finance Lease Payments, Interest	34,118
Finance Lease, Present Value Lease Liabilities	23,121
Finance Lease, Current Lease Liabilities	2,651		$ 3,410
Finance Lease, Long-term Lease Liabilities	20,470		27,181
Operating Lease Payments, Remainder of 2019	12,440
Operating Lease Payments, Liability, 2020	22,390
Operating Lease Payments, Liability, 2021	19,576
Operating Lease Payments, Liability, 2022	17,309
Operating Lease Payments, Liability, 2023	14,536
Operating Lease Payments, Thereafter	82,149
Operating Lease Payments, Total Discounted Cash Flows	168,400
Operating Lease Payments, Interest	44,033
Operating Lease, Present Value of Lease Liabilities	124,367	$ 101,300
Operating Lease, Current Lease Liabilities	16,999		0
Operating Lease, Long-term Lease Liabilities	107,368		0
Operating Lease, Payments to be Received, Remainder of 2019	13,070
Operating Lease, Payments to be Received, 2020	24,202
Operating Lease, Payments to be Received, 2021	22,100
Operating Lease, Payments to be Received, 2022	19,961
Operating Lease, Payments to be Received, 2023	17,012
Operating Lease, Payments to be Received, Thereafter	105,310
Operating Lease, Payments to be Received, Total Undiscounted Cash Flows	$ 201,655
Capital Leases, Future Minimum Payments Due, Next Twelve Months			9,271
Capital Leases, Future Minimum Payments Due in Two Years			8,664
Capital Leases, Future Minimum Payments Due in Three Years			8,010
Capital Leases, Future Minimum Payments Due in Four Years			7,320
Capital Leases, Future Minimum Payments Due in Five Years			6,451
Capital Leases, Future Minimum Payments Due Thereafter			33,670
Capital Leases, Future Minimum Payments Due			73,386
Capital Leases, Future Minimum Payments, Interest Included in Payments			42,795
Capital Leases, Future Minimum Payments, Present Value of Net Minimum Payments			30,591
Operating Leases, Future Minimum Payments Due, Next Twelve Months			23,504
Operating Leases, Future Minimum Payments, Due in Two Years			20,161
Operating Leases, Future Minimum Payments, Due in Three Years			17,316
Operating Leases, Future Minimum Payments, Due in Four Years			14,646
Operating Leases, Future Minimum Payments, Due in Five Years			11,881
Operating Leases, Future Minimum Payments, Due Thereafter			49,004
Operating Leases, Future Minimum Payments Due			136,512
Operating Leases, Future Minimum Payments Receivable, Current			21,001
Operating Leases, Future Minimum Payments Receivable, in Two Years			18,493
Operating Leases, Future Minimum Payments Receivable, in Three Years			16,573
Operating Leases, Future Minimum Payments Receivable, in Four Years			14,887
Operating Leases, Future Minimum Payments Receivable, in Five Years			12,932
Operating Leases, Future Minimum Payments Receivable, Thereafter			65,273
Operating Leases, Future Minimum Payments Receivable			$ 149,159