Commitments And Contingencies (Schedule Of Contractual Obligations And Commitments) (Details) $ in Thousands	Jun. 26, 2020 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Remainder of Fiscal 2018	$ 0
Naming rights, Fiscal 2019	7,915
Naming rights, Fiscal 2020	8,015
Naming rights, Fiscal 2021	8,116
Naming rights, Fiscal 2022	8,219
Naming rights, Thereafter	69,600
Naming rights, Total	101,865
Purchase obligation, Remainder of 2018	12,119
Purchase obligation, Fiscal 2019	5,210
Purchase obligation, Fiscal 2020	2,660
Purchase Obligation, Fiscal 2021	0
Purchase obligation, Fiscal 2022	0
Purchase obligation, Thereafter	0
Purchase obligation, Total	19,989
Donation commitments, Remainder of Fiscal 2018	1,832
Donation commitments, Fiscal 2019	2,931
Donation commitments, Fiscal 2020	155
Donation commitments, Fiscal 2021	155
Donation commitments, Fiscal 2022	155
Donation commitments, Thereafter	1,157
Donation commitments, Total	6,385
Total, due in Remainder of Fiscal 2018	13,951
Total, due in Fiscal 2019	16,056
Total, due in Fiscal 2020	10,830
Total, due in Fiscal 2021	8,271
Total, due in Fiscal 2022	8,374
Total, due Thereafter	70,757
Total due	$ 128,239