Acquisitions (Schedule Of Purchase Price Allocation) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2018	Jun. 24, 2017	Mar. 31, 2018
Purchase price of acquisitions allocation
Goodwill	$ 533,507		$ 522,892
Fiscal 2018 Acquisitions [Member]
Purchase price of acquisitions allocation
Inventories		$ 181
Other current assets		20
Property, plant and equipment		1,295
Intangible assets		436
Other non-current assets		7
Long-term deferred income tax assets		625
Total assets acquired		2,564
Warranty reserves		29
Other current liabilities		252
Long-term capital leases and financing obligations		2,482
Other long-term liabilities		22
Total liabilities assumed		2,785
Total net identifiable assets acquired		(221)
Total consideration transferred		3,728
Less: total net identifiable assets acquired (liabilities assumed)		(221)
Goodwill		$ 3,949
Fiscal 2019 Acquisitions [Member]
Purchase price of acquisitions allocation
Trade receivables	1,834
Inventories	7,949
Other current assets	138
Property, plant and equipment	5,015
Intangible assets	8,677
Long-term deferred income tax assets	1,036
Total assets acquired	24,649
Warranty reserves	115
Other current liabilities	985
Long-term capital leases and financing obligations	6,320
Other long-term liabilities	189
Total liabilities assumed	7,609
Total net identifiable assets acquired	17,040
Total consideration transferred	27,313
Less: total net identifiable assets acquired (liabilities assumed)	17,040
Goodwill	$ 10,273