Acquisitions (Schedule Of Purchase Price Allocation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 30, 2019	Mar. 31, 2018	Mar. 25, 2017
Purchase price of acquisitions allocation
Goodwill	$ 565,503	$ 522,892	$ 501,736
Fiscal 2018 Acquisitions [Member]
Purchase price of acquisitions allocation
Inventories		1,053
Other current assets		240
Property, plant and equipment		9,396
Intangible assets		4,162
Other non-current assets		7
Long-term deferred income tax assets		3,076
Total assets acquired		17,934
Other current liabilities		1,654
Long-term capital leases and financing obligations		13,707
Other long-term liabilities		261
Total liabilities assumed		15,622
Total net identifiable assets acquired		2,312
Total consideration transferred		22,624
Less: total net identifiable assets acquired		2,312
Goodwill		$ 20,312
Fiscal 2019 Acquisitions [Member]
Purchase price of acquisitions allocation
Trade receivables	1,674
Inventories	9,271
Other current assets	308
Property, plant and equipment	16,779
Intangible assets	9,928
Other non-current assets	21
Long-term deferred income tax assets	3,067
Total assets acquired	41,048
Other current liabilities	2,466
Long-term capital leases and financing obligations	18,473
Other long-term liabilities	616
Total liabilities assumed	21,555
Total net identifiable assets acquired	19,493
Total consideration transferred	61,617
Less: total net identifiable assets acquired	19,493
Goodwill	$ 42,124