Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2012	Oct. 02, 2011	Sep. 30, 2012	Oct. 02, 2011
Segment Reporting Information [Line Items]
Revenues by segment	$ 133,401	$ 138,318	$ 263,562	$ 287,603
Amortization of intangible assets			(10,467)	(8,123)
Amortization of stock-based compensation	(3,250)	(4,029)	(6,532)	(8,149)
Consulting expenses related to stockholder activities			2,614	0
Proceeds from Life Insurance Policies			(2,313)	0
Interest income (expense) and other, net	(206)	(1,828)	1,794	(1,784)
Income before income taxes from continuing operations	(716)	7,733	(4,159)	21,469
Communications [Member]
Segment Reporting Information [Line Items]
Revenues by segment	69,293	66,613	132,363	136,535
Income before income taxes from continuing operations	19,559	25,096	37,045	52,462
Computing and Consumer [Member]
Segment Reporting Information [Line Items]
Revenues by segment	64,108	71,705	131,199	151,068
Income before income taxes from continuing operations	(3,220)	(7,195)	(8,033)	(9,528)
Unallocated expenses [Member]
Segment Reporting Information [Line Items]
Amortization of intangible assets	(5,573)	(3,861)	(10,464)	(7,805)
Inventory fair market value adjustment	(100)	0	(458)	0
Fabrication production transfer costs	0	(816)	0	(2,660)
Assets impairment	59	92	118	182
Amortization of stock-based compensation	(3,617)	(4,281)	(6,739)	(8,053)
Severance, retention and facility closure costs	(2,271)	(811)	(2,999)	(2,627)
Acquisition-related costs and other	(4,830)	0	(11,466)	0
Consulting expenses related to stockholder activities	(38)	0
Deferred compensation plan expense (benefit)	(3)	1,337	(181)	1,282
Proceeds from Life Insurance Policies	0	0
Interest income (expense) and other, net	$ (682)	$ (1,828)	$ (681)	$ (1,784)