Acquisitions (Schedule Of Purchase Price Allocation) (Details) - USD ($) $ in Thousands	9 Months Ended
	Dec. 23, 2017	Dec. 24, 2016	Mar. 25, 2017
Purchase price of acquisitions allocation
Plus: gain on bargain purchase	$ 13
Goodwill	517,989		$ 501,736
Fiscal 2018 Acquisitions [Member]
Purchase price of acquisitions allocation
Inventories	476
Other current assets	146
Property, plant and equipment	6,675
Intangible assets	3,380
Other non-current assets	7
Long-term deferred income tax assets	2,704
Total assets acquired	13,388
Other current liabilities	1,243
Long-term capital leases and financing obligations	11,298
Other long-term liabilities	80
Total liabilities assumed	12,621
Total net identifiable assets acquired	767
Total consideration transferred	15,732
Less: total net identifiable assets acquired	767
Goodwill	$ 14,965
Fiscal 2017 Acquisitions [Member]
Purchase price of acquisitions allocation
Trade receivables		$ 7,006
Inventories		18,196
Other current assets		405
Property, plant and equipment		25,645
Intangible assets		18,089
Other non-current assets		174
Long-term deferred income tax assets		7,014
Total assets acquired		76,529
Warranty reserves		519
Other current liabilities		2,973
Long-term capital leases and financing obligations		29,377
Other long-term liabilities		1,103
Total liabilities assumed		33,972
Total net identifiable assets acquired		42,557
Total consideration transferred		133,110
Plus: gain on bargain purchase		13
Less: total net identifiable assets acquired		42,557
Goodwill		$ 90,566