Commitments and Contingencies (Schedule Of Payments Due By Period) (Details) $ in Thousands	9 Months Ended
	Dec. 26, 2020 USD ($)
Commitments and Contingencies [Abstract]
Principal payments on long-term debt, Total	$ 190,000
Principal payments on long-term debt, 4 to 5 years	190,000
Finance lease commitments/financing obligations, Total	525,740	[1]
Finance lease commitments/financing obligations, Within 1 Year	55,001	[1]
Finance lease commitments/financing obligations, 2 to 3 Years	109,489	[1]
Finance lease commitments/financing obligations, 4 to 5 Years	101,296	[1]
Finance lease commitments/financing obligations, After 5 Years	259,954	[1]
Operating lease commitments, Total	244,508	[1]
Operating lease commitments, Within 1 year	36,396	[1]
Operating lease commitments, 2 to 3 years	66,097	[1]
Operating lease commitments, 4 to 5 years	54,180	[1]
Operating lease commitments, After 5 years	87,835	[1]
Accrued rent, Total	2,664
Accrued rent, Within 1 year	2,492
Accrued rent, 2 to 3 Years	141
Accrued rent, 4 to 5 Years	14
Accrued rent, After 5 Years	17
Other liabilities, Total	1,333
Other liabilities, Within 1 year	800
Other liabilities, 2 to 3 years	533
Other liabilities, 4 to 5 years
Other liabilities, After 5 years
Contractual commitments, Total	964,245
Contractual commitments, Within 1 year	94,689
Contractual commitments, 2 to 3 years	176,260
Contractual commitments, 4 to 5 years	345,490
Contractual commitments, After 5 years	347,806
Operating lease payments, related to options to extend, reasonably certain of being exercised	112,600
Finance lease payments, related to options to extend, reasonable certain of being exercised	$ 59,400

[1] Finance and operating lease commitments represent future undiscounted lease payments and include $112.6 million and $59.4 million, respectively, related to options to extend lease terms that are reasonably certain of being exercised.