Balance Sheet Detail (Additional Information) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 02, 2016	Sep. 27, 2015	Oct. 02, 2016	Sep. 27, 2015	Apr. 03, 2016
Inventories, net
Raw materials	$ 3,153		$ 3,153		$ 3,251
Work-in-process	27,105		27,105		29,408
Finished goods	13,777		13,777		21,584
Total inventories, net	44,035		44,035		54,243
Property, plant and equipment, net
Total property, plant and equipment, gross	318,684		318,684		311,178
Less: accumulated depreciation	(243,269)		(243,269)		(237,301)
Total property, plant and equipment, net	75,415		75,415		73,877
Other accrued liabilities
Accrued restructuring costs	15,649		15,649		2,641
Other	14,435		14,435		12,333
Total other accrued liabilities	30,084		30,084		14,974
Other long-term obligations
Deferred compensation related liabilities	14,835		14,835		13,052
Other	6,601		6,601		10,402
Total other long-term liabilities	21,436		21,436		23,454
Depreciation expense	5,000	$ 4,200	10,192	$ 8,648
Land
Property, plant and equipment, net
Total property, plant and equipment, gross	11,535		11,535		11,535
Machinery and equipment
Property, plant and equipment, net
Total property, plant and equipment, gross	257,354		257,354		250,628
Building and leasehold improvements
Property, plant and equipment, net
Total property, plant and equipment, gross	$ 49,795		$ 49,795		$ 49,015