Long-Term Debt, Capital Leases And Financing Obligations (Narrative) (Details)			12 Months Ended
		Apr. 25, 2019 USD ($) entity	Mar. 30, 2019 USD ($) entity	Mar. 31, 2018 USD ($)
Debt Instrument [Line Items]
Net availability under the credit facility			$ 430,900,000
Carrying amount of long-term debt (including current portion)			137,722,000	$ 148,100,000
Fair value of long-term debt (including current portion)			137,700,000	$ 148,100,000
The total amount financed for properties with capital leases and financing obligations			260,300,000
Revolving Credit Facility, January 2016 [Member]
Debt Instrument [Line Items]
Revolving credit facility agreement			$ 600,000,000
Interest rate over LIBOR on the facility			1.25%	1.25%
Revolving credit facility agreement term			5 years
Revolving credit facility agreement, number of participating banks | entity			8
Provision allowing to expand the amount of overall facility			$ 100,000,000
Amount outstanding under Credit Facility	[1]		$ 137,682,000	$ 148,028,000
Revolving Credit Facility, Amended Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility agreement term			5 years
Standby Letters of Credit [Member]
Debt Instrument [Line Items]
Line of credit sub-facility for issuing standby letters of credit			$ 80,000,000
Letters of credit outstanding			$ 31,400,000
Minimum [Member] | Revolving Credit Facility, January 2016 [Member]
Debt Instrument [Line Items]
Interest rate over LIBOR on the facility			0.75%
Percentage of face amount of standby letter of credit payable as fees			0.15%
Minimum [Member] | Standby Letters of Credit [Member]
Debt Instrument [Line Items]
Percentage of face amount of standby letter of credit payable as fees			0.875%
Maximum [Member] | Revolving Credit Facility, January 2016 [Member]
Debt Instrument [Line Items]
Interest rate over LIBOR on the facility			1.75%
Percentage of face amount of standby letter of credit payable as fees			0.35%
Maximum [Member] | Standby Letters of Credit [Member]
Debt Instrument [Line Items]
Percentage of face amount of standby letter of credit payable as fees			1.875%
Subsequent Event [Member] | Revolving Credit Facility, Amended Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility agreement		$ 600,000,000
Revolving credit facility agreement, number of participating banks | entity		8
Debt Instrument, Maturity Date		Apr. 25, 2024
Provision allowing to expand the amount of overall facility		$ 250,000,000
Credit facility, Change in increased availability		150,000,000
Line of credit sub-facility for issuing standby letters of credit		$ 80,000,000
Subsequent Event [Member] | Minimum [Member] | Revolving Credit Facility, Amended Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate over LIBOR on the facility		0.75%
Percentage of face amount of standby letter of credit payable as fees		0.875%
Subsequent Event [Member] | Maximum [Member] | Revolving Credit Facility, Amended Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate over LIBOR on the facility		2.00%
Percentage of face amount of standby letter of credit payable as fees		2.125%

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