Balance Sheet Detail (Additional Information) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 28, 2015	Mar. 29, 2015
Inventories, net
Raw materials	$ 4,921	$ 4,709
Work-in-process	19,088	18,377
Finished goods	18,694	22,324
Total inventories, net	42,703	45,410
Property, plant and equipment, net
Total property, plant and equipment, gross	351,861	351,789
Less: accumulated depreciation	(287,440)	(286,281)
Total property, plant and equipment, net	64,421	65,508
Deferred compensation related liabilities	14,865	13,143
Other	5,899	4,462
Total other long-term liabilities	20,764	17,605
Other accrued liabilities
Accrued restructuring costs	3,710	10,512
Other	7,293	7,070
Total other accrued liabilities	11,003	17,582
High-Speed Converter Business
Other accrued liabilities
Accrued Severance Costs	3,300	10,200
Land
Property, plant and equipment, net
Total property, plant and equipment, gross	11,592	11,578
Machinery and equipment
Property, plant and equipment, net
Total property, plant and equipment, gross	292,021	292,180
Building and leasehold improvements
Property, plant and equipment, net
Total property, plant and equipment, gross	$ 48,248	$ 48,031