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Industry Segments (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Jan. 01, 2012
Jan. 02, 2011
Jan. 01, 2012
Jan. 02, 2011
Apr. 03, 2011
Segment Reporting Information [Line Items]          
Revenues by segment $ 119,977 $ 147,524 $ 407,580 $ 460,715  
Income (loss) from continuing operations, before income taxes (327) 15,008 21,142 55,780  
Amortization of intangible assets (4,006) (4,989) (12,129) (14,916)  
Stock-based compensation expense (4,425) (4,513) (12,574) (13,207)  
Revenues from External Customers and Long-Lived Assets [Line Items]          
Revenues 119,977 147,524 407,580 460,715  
Total property, plant and equipment, net 69,977   69,977   67,754
Net Revenues [Member]
         
Concentration Risk [Line Items]          
Number of distributors for which concentration risk is disclosed 3 2 3 2  
Net Revenues [Member] | Distributor Concentration Risk - Highest Percentage [Member]
         
Concentration Risk [Line Items]          
Concentration of risk (in hundredths) 16.00% 19.00% 16.00% 19.00%  
Net Revenues [Member] | Distributor Concentration Risk - Second Highest Percentage [Member]
         
Concentration Risk [Line Items]          
Concentration of risk (in hundredths) 11.00% 11.00% 11.00% 11.00%  
Net Revenues [Member] | Distributor Concentration Risk - Third Highest Percentage [Member]
         
Concentration Risk [Line Items]          
Concentration of risk (in hundredths) 10.00%   10.00%    
Gross Accounts Receivable [Member]
         
Concentration Risk [Line Items]          
Number of distributors for which concentration risk is disclosed 4   4   3
Gross Accounts Receivable [Member] | Distributor Concentration Risk - Highest Percentage [Member]
         
Concentration Risk [Line Items]          
Concentration of risk (in hundredths) 20.00%   20.00%   19.00%
Gross Accounts Receivable [Member] | Distributor Concentration Risk - Second Highest Percentage [Member]
         
Concentration Risk [Line Items]          
Concentration of risk (in hundredths) 12.00%   12.00%   14.00%
Gross Accounts Receivable [Member] | Distributor Concentration Risk - Third Highest Percentage [Member]
         
Concentration Risk [Line Items]          
Concentration of risk (in hundredths) 10.00%   10.00%   11.00%
Gross Accounts Receivable [Member] | Distributor Concentration Risk - Fourth Highest Percentage [Member]
         
Concentration Risk [Line Items]          
Concentration of risk (in hundredths) 10.00%   10.00%    
Asia Pacific [Member]
         
Segment Reporting Information [Line Items]          
Revenues by segment 78,444 91,664 272,210 302,416  
Revenues from External Customers and Long-Lived Assets [Line Items]          
Revenues 78,444 91,664 272,210 302,416  
Americas [Member]
         
Segment Reporting Information [Line Items]          
Revenues by segment 20,020 25,418 57,785 73,088  
Revenues from External Customers and Long-Lived Assets [Line Items]          
Revenues 20,020 25,418 57,785 73,088  
Japan [Member]
         
Segment Reporting Information [Line Items]          
Revenues by segment 10,417 16,621 33,463 42,667  
Revenues from External Customers and Long-Lived Assets [Line Items]          
Revenues 10,417 16,621 33,463 42,667  
Europe [Member]
         
Segment Reporting Information [Line Items]          
Revenues by segment 11,096 13,821 44,122 42,544  
Revenues from External Customers and Long-Lived Assets [Line Items]          
Revenues 11,096 13,821 44,122 42,544  
United States [Member]
         
Revenues from External Customers and Long-Lived Assets [Line Items]          
Total property, plant and equipment, net 52,221   52,221   51,642
Canada [Member]
         
Revenues from External Customers and Long-Lived Assets [Line Items]          
Total property, plant and equipment, net 4,642   4,642   5,613
Malaysia [Member]
         
Revenues from External Customers and Long-Lived Assets [Line Items]          
Total property, plant and equipment, net 12,312   12,312   8,599
All other countries [Member]
         
Revenues from External Customers and Long-Lived Assets [Line Items]          
Total property, plant and equipment, net 802   802   1,900
Communications [Member]
         
Segment Reporting Information [Line Items]          
Revenues by segment 55,513 72,775 192,048 220,159  
Income (loss) from continuing operations, before income taxes 16,923 32,868 69,374 96,511  
Revenues from External Customers and Long-Lived Assets [Line Items]          
Revenues 55,513 72,775 192,048 220,159  
Computing and Consumer [Member]
         
Segment Reporting Information [Line Items]          
Revenues by segment 64,464 74,749 215,532 240,556  
Income (loss) from continuing operations, before income taxes (6,836) (5,038) (16,536) (5,018)  
Revenues from External Customers and Long-Lived Assets [Line Items]          
Revenues 64,464 74,749 215,532 240,556  
Unallocated Amount to Segment [Member]
         
Segment Reporting Information [Line Items]          
Amortization of intangible assets (4,006) (4,739) (11,628) (14,165)  
Acquisition related costs and other (109) (694) (109) (1,833)  
Fair market value adjustment to acquired inventory sold 0 0 0 (379)  
Restructuring and related costs (3,872) (1,697) (4,264) (3,354)  
Fabrication product transfer costs (1,233) (1,639) (3,893) (3,851)  
Compensation expense - deferred compensation plan (649) (815) 633 (1,303)  
Impairment of assets 73 107 255 383  
Stock-based compensation expense (4,312) (4,007) (12,365) (11,772)  
Interest income (expense) and other, net $ (2,140) $ 1,352 $ (3,924) $ 2,793