Long-Term Debt, Capital Leases And Financing Obligations (Long-Term Debt) (Details) - USD ($) $ in Thousands		Mar. 30, 2019	Mar. 31, 2018
Long-term Debt, Unclassified [Abstract]
Note payable, non-interest bearing, due in equal installments through September 2019		$ 40	$ 80
Less – Current portion of long-term debt		(40)	(40)
Long-term debt		137,682	148,068
Obligations under capital leases and financing obligations at various interest rates, due in installments through May 2049		260,278	246,169
Less – Current portion of capital leases and financing obligations		(22,189)	(18,949)
Long-term capital leases and financing obligations		238,089	227,220
Revolving Credit Facility, January 2016 [Member]
Long-term Debt, Unclassified [Abstract]
Revolving Credit Facility, LIBOR-based	[1]	$ 137,682	$ 148,028
London Interbank Offered Rate (LIBOR)		2.50%

[1] The London Interbank Offered Rate ("LIBOR") at March 30, 2019 was 2.5%.