Commitments And Contingencies (Schedule Of Contractual Obligations And Commitments) (Details) $ in Thousands	Mar. 27, 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	18,563
Purchase obligation, Fiscal 2019	4,727
Purchase obligation, Fiscal 2020	2,176
Purchase Obligation, Fiscal 2021	0
Purchase obligation, Fiscal 2022	0
Purchase obligation, Thereafter	0
Purchase obligation, Total	25,466
Donation commitments, Remainder of Fiscal 2018	3,877
Donation commitments, Fiscal 2019	931
Donation commitments, Fiscal 2020	155
Donation commitments, Fiscal 2021	155
Donation commitments, Fiscal 2022	155
Donation commitments, Thereafter	1,157
Donation commitments, Total	6,430
Total, due in Remainder of Fiscal 2018	22,440
Total, due in Fiscal 2019	13,573
Total, due in Fiscal 2020	10,346
Total, due in Fiscal 2021	8,271
Total, due in Fiscal 2022	8,374
Total, due Thereafter	70,757
Total due	$ 133,761