Balance Sheet Detail (Additional Information) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 01, 2017	Jan. 03, 2016	Jan. 01, 2017	Jan. 03, 2016	Apr. 03, 2016
Inventories, net
Raw materials	$ 1,817		$ 1,817		$ 3,251
Work-in-process	29,023		29,023		29,408
Finished goods	14,218		14,218		21,584
Total inventories, net	45,058		45,058		54,243
Property, plant and equipment, net
Total property, plant and equipment, gross	324,556		324,556		311,178
Less: accumulated depreciation	(243,058)		(243,058)		(237,301)
Total property, plant and equipment, net	81,498		81,498		73,877
Other accrued liabilities
Accrued restructuring costs	11,165		11,165		2,641
Other	12,934		12,934		12,333
Total other accrued liabilities	24,099		24,099		14,974
Other long-term liabilities
Deferred compensation related liabilities	14,987		14,987		13,052
Other	3,744		3,744		10,402
Total other long-term liabilities	18,731		18,731		23,454
Depreciation expense	4,700	$ 4,400	14,940	$ 13,056
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	263,915		263,915		250,628
Building and leasehold improvements
Property, plant and equipment, net
Total property, plant and equipment, gross	$ 49,106		$ 49,106		$ 49,015