Leasing (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 29, 2019	Mar. 30, 2019
Sale Leaseback Transaction [Line Items]
Finance lease and financing obligation assets, net	$ 142,066	$ 128,029
Long-term finance leases and financing obligations	260,818	$ 238,089
Operating lease payments, related to options to extend, reasonably certain of being exercised	68,000
Finance lease payments, related to options to extend, reasonable certain of being exercised	106,000
Lease payments, leases signed but not yet commenced	15,000
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	$ 7,700
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	39 years
Option to extend, term of option	69 years