Commitments And Contingencies (Schedule Of Contractual Obligations And Commitments) (Details) $ in Thousands	Mar. 29, 2019 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Remainder of Fiscal 2018	$ 0
Naming rights, Fiscal 2019	7,909
Naming rights, Fiscal 2020	8,008
Naming rights, Fiscal 2021	8,108
Naming rights, Fiscal 2022	8,209
Naming rights, Thereafter	78,656
Naming rights, Total	110,890
Donation commitments, Remainder of Fiscal 2018	5,403
Donation commitments, Fiscal 2019	2,341
Donation commitments, Fiscal 2020	141
Donation commitments, Fiscal 2021	141
Donation commitments, Fiscal 2022	141
Donation commitments, Thereafter	1,200
Donation commitments, Total	78,119
Operating leases, Remainder of 2018	11,691
Operating leases, Fiscal 2019	15,952
Operating leases, Fiscal 2020	11,935
Operating leases, Fiscal 2021	9,963
Operating leases, Fiscal 2022	9,096
Operating leases, Thereafter	19,482
Operating leases, Total	117,568
Purchase obligation, Remainder of 2018	46,009
Purchase obligation, Fiscal 2019	69,707
Purchase obligation, Fiscal 2020	1,472
Purchase Obligation, Fiscal 2021	380
Purchase obligation, Fiscal 2022	0
Purchase obligation, Thereafter	0
Purchase obligation, Total	9,367
Total, due in Remainder of Fiscal 2018	63,103
Total, due in Fiscal 2019	95,909
Total, due in Fiscal 2020	21,556
Total, due in Fiscal 2021	18,592
Total, due in Fiscal 2022	17,446
Total, due Thereafter	99,338
Total due	$ 315,944