Leasing (Narrative) (Details) - USD ($) $ in Thousands	9 Months Ended
	Dec. 28, 2019	Mar. 30, 2019
Sale Leaseback Transaction [Line Items]
Finance lease and financing obligation assets, net	$ 193,900	$ 128,029
Long-term finance leases and financing obligations	298,888	$ 238,089
Operating lease payments, related to options to extend, reasonably certain of being exercised	80,000
Finance lease payments, related to options to extend, reasonable certain of being exercised	119,000
Lease payments, leases signed but not yet commenced	16,000
Failed Sale Leasebacks That Were Assumed Through Acquisitions [Member]
Sale Leaseback Transaction [Line Items]
Finance lease and financing obligation assets, net	4,600
Long-term finance leases and financing obligations	$ 7,600
Minimum [Member]
Sale Leaseback Transaction [Line Items]
Remaining lease term	1 year
Option to extend, term of option	1 year
Maximum [Member]
Sale Leaseback Transaction [Line Items]
Remaining lease term	38 years
Option to extend, term of option	30 years