Acquisitions (Schedule Of Purchase Price Allocation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 26, 2016	Mar. 28, 2015	Mar. 29, 2014
Purchase price of acquisitions allocation
Plus: gain on bargain purchase	$ 0	$ 386	$ 217
Goodwill	400,132	349,088	$ 270,039
Fiscal 2016 Aquisitions [Member]
Purchase price of acquisitions allocation
Trade receivables	263
Inventories	922
Other current assets	502
Property, plant and equipment	11,177
Intangible assets	11,270
Other non-current assets	24
Long-term deferred income tax assets	5,465
Total assets acquired	29,623
Warranty reserves	162
Other current liabilities	1,617
Long-term capital leases and financing obligations	22,142
Other long-term liabilities	845
Total liabilities assumed	24,766
Total net identifiable assets acquired	4,857
Total consideration transferred	51,104
Less: total net identifiable assets acquired	4,857
Goodwill	$ 46,247
Fiscal 2015 Acquisitions [Member]
Purchase price of acquisitions allocation
Inventories		5,588
Other current assets		567
Property, plant and equipment		35,355
Intangible assets		8,608
Other non-current assets		129
Long-term deferred income tax assets		17,649
Total assets acquired		67,896
Warranty reserves		990
Other current liabilities		3,719
Long-term capital leases and financing obligations		57,292
Other long-term liabilities		1,703
Total liabilities assumed		63,704
Total net identifiable assets acquired		4,192
Total consideration transferred		87,451
Plus: gain on bargain purchase		383
Less: total net identifiable assets acquired		4,192
Goodwill		$ 83,642