Balance Sheet Detail - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 01, 2017	Oct. 02, 2016	Oct. 01, 2017	Oct. 02, 2016	Apr. 02, 2017
Inventories, net
Raw materials	$ 3,207		$ 3,207		$ 2,017
Work-in-process	39,024		39,024		35,192
Finished goods	21,461		21,461		15,079
Total inventories, net	63,692		63,692		52,288
Accounts receivable, net
Accounts receivable, gross	112,636		112,636		94,396
Allowances	(6,948)		(6,948)		(5,084)
Total accounts receivable, net	105,688		105,688		89,312
Property, plant and equipment, net
Total property, plant and equipment, gross	340,411		340,411		329,240
Less: accumulated depreciation	(256,245)		(256,245)		(248,279)
Total property, plant and equipment, net	84,166		84,166		80,961
Other accrued liabilities
Accrued restructuring costs	4,322		4,322		4,841
Other	23,755		23,755		15,364
Total other accrued liabilities	28,077		28,077		20,205
Other long-term obligations
Deferred compensation related liabilities	15,791		15,791		15,024
Other	10,743		10,743		3,870
Total other long-term liabilities	26,534		26,534		18,894
Depreciation expense	7,100	$ 5,000	13,200	$ 10,192
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	278,698		278,698		268,683
Building and leasehold improvements
Property, plant and equipment, net
Total property, plant and equipment, gross	$ 50,178		$ 50,178		$ 49,022