Acquisitions (Schedule Of Purchase Price Allocation) (Details) - USD ($) $ in Thousands	6 Months Ended
	Sep. 23, 2017	Sep. 24, 2016	Mar. 25, 2017
Purchase price of acquisitions allocation
Plus: gain on bargain purchase	$ 13
Goodwill	515,772		$ 501,736
Fiscal 2018 Acquisitions [Member]
Purchase price of acquisitions allocation
Inventories	443
Other current assets	139
Property, plant and equipment	5,461
Intangible assets	2,917
Other non-current assets	7
Long-term deferred income tax assets	2,129
Total assets acquired	11,096
Other current liabilities	980
Long-term capital leases and financing obligations	8,831
Other long-term liabilities	80
Total liabilities assumed	9,891
Total net identifiable assets acquired	1,205
Total consideration transferred	14,033
Less: total net identifiable assets acquired	1,205
Goodwill	$ 12,828
Fiscal 2017 Acquisitions [Member]
Purchase price of acquisitions allocation
Trade receivables		$ 7,006
Inventories		18,125
Other current assets		377
Property, plant and equipment		23,674
Intangible assets		17,804
Other non-current assets		174
Long-term deferred income tax assets		6,099
Total assets acquired		73,259
Warranty reserves		448
Other current liabilities		2,805
Long-term capital leases and financing obligations		26,207
Other long-term liabilities		999
Total liabilities assumed		30,459
Total net identifiable assets acquired		42,800
Total consideration transferred		129,096
Plus: gain on bargain purchase		13
Less: total net identifiable assets acquired		42,800
Goodwill		$ 86,309