Balance Sheet Detail (Details) - USD ($) $ in Thousands	3 Months Ended
	Jul. 01, 2018	Jul. 02, 2017	Apr. 02, 2018	Apr. 01, 2018
Inventories, net
Raw materials	$ 5,137			$ 4,345
Work-in-process	43,782			45,713
Finished goods	17,258			18,644
Total inventories, net	66,177			68,702
Accounts receivable, net
Accounts receivable, gross	124,539			120,953
Allowance for returns, price credits and doubtful accounts (1)	(1,562)			(12,174)
Total accounts receivable, net	122,977			108,779
Property, plant and equipment, net
Total property, plant and equipment, gross	353,255			348,041
Less: accumulated depreciation	(266,320)			(261,196)
Total property, plant and equipment, net	86,935			86,845
Other accrued liabilities
Accrued restructuring costs	2,055			4,637
Current income tax payable	5,801			6,281
Refund liabilities	9,519		$ 10,964	0
Other	15,118			15,606
Total other accrued liabilities	32,493			26,524
Other long-term obligations
Deferred compensation related liabilities	18,105			16,310
Other	9,264			9,374
Total other long-term liabilities	27,369			25,684
Depreciation expense	6,586	$ 6,116
Land
Property, plant and equipment, net
Total property, plant and equipment, gross	11,535			11,535
Machinery and equipment
Property, plant and equipment, net
Total property, plant and equipment, gross	291,073			285,784
Building and leasehold improvements
Property, plant and equipment, net
Total property, plant and equipment, gross	$ 50,647			$ 50,722