Acquisitions (Schedule Of Purchase Price Allocation) (Details) - USD ($) $ in Thousands	9 Months Ended
	Dec. 26, 2020	Dec. 28, 2019	Mar. 28, 2020
Purchase price of acquisitions allocation
Total consideration transferred		$ 103,700
Goodwill	$ 689,847		$ 671,843
Fiscal 2020 Acquisitions [Member]
Purchase price of acquisitions allocation
Inventories		4,433
Other current assets		706
Property, plant and equipment		2,405
Finance lease and financing obligation assets, net		29,147
Operating lease assets, net		42,680
Intangible assets		2,847
Other non-current assets		375
Long-term deferred income tax assets		4,870
Total assets acquired		87,463
Current portion of finance leases and financing obligations		2,672
Current portion of operating lease liabilities		4,416
Deferred revenue		1,618
Other current liabilities		358
Long-term finance leases and financing obligations		36,225
Long-term operating lease liabilities		43,668
Other long-term liabilities		1,747
Total liabilities assumed		90,704
Total net identifiable liabilities assumed		(3,241)
Total consideration transferred		103,692
Less: total net identifiable liabilities assumed		(3,241)
Goodwill		$ 106,933
Fiscal 2021 Acquisitions [Member]
Purchase price of acquisitions allocation
Inventories	1,220
Other current assets	149
Property, plant and equipment	683
Finance lease and financing obligation assets, net	4,328
Operating lease assets, net	9,531
Intangible assets	418
Other non-current assets	31
Long-term deferred income tax assets	1,371
Total assets acquired	17,731
Current portion of finance leases and financing obligations	657
Current portion of operating lease liabilities	1,067
Deferred revenue	697
Other current liabilities	4
Long-term finance leases and financing obligations	7,361
Long-term operating lease liabilities	7,984
Other long-term liabilities	536
Total liabilities assumed	18,306
Total net identifiable liabilities assumed	(575)
Total consideration transferred	17,426
Less: total net identifiable liabilities assumed	(575)
Goodwill	$ 18,001