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SEGMENT INFORMATION (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Feb. 01, 2014
Jan. 26, 2013
Feb. 01, 2014
segment
Jan. 26, 2013
Segment Reporting [Abstract]        
Number of reportable segments     4  
Segment Reporting Information [Line Items]        
Gain (Loss) Related to Litigation Settlement $ 0 $ 0 $ 0 $ 20,000
Net sales 189,753 122,982 547,933 371,478
Transfers between segments 0 0 0 0
Net sales to unaffiliated customers 189,753 122,982 547,933 371,478
Income (loss) from operations 16,381 4,257 53,242 35,542
Interest expense, net 88 20 265 27
Other expense, net 270 114 763 609
Income/(loss) before income taxes 16,023 4,123 52,214 34,906
Automotive
        
Segment Reporting Information [Line Items]        
Gain (Loss) Related to Litigation Settlement       20,000
Net sales 129,666 74,349 360,061 225,954
Transfers between segments (724) (93) (1,568) (500)
Net sales to unaffiliated customers 128,942 74,256 358,493 225,454
Income (loss) from operations 17,906 3,258 48,325 32,406
Interconnect
        
Segment Reporting Information [Line Items]        
Net sales 41,364 32,218 129,973 98,488
Transfers between segments (777) (591) (2,048) (1,895)
Net sales to unaffiliated customers 40,587 31,627 127,925 96,593
Income (loss) from operations 5,073 3,651 19,397 12,655
Power Products
        
Segment Reporting Information [Line Items]        
Net sales 18,029 12,816 54,002 37,557
Transfers between segments (32) (30) (149) (136)
Net sales to unaffiliated customers 17,997 12,786 53,853 37,421
Income (loss) from operations 2,125 517 7,931 568
Other
        
Segment Reporting Information [Line Items]        
Net sales 2,481 4,276 7,522 12,022
Transfers between segments (81) (33) (152) (72)
Net sales to unaffiliated customers 2,400 4,243 7,370 11,950
Income (loss) from operations (659) 1,124 (808) 2,672
Eliminations/Corporate
        
Segment Reporting Information [Line Items]        
Net sales (1,787) (677) (3,625) (2,543)
Transfers between segments 1,614 747 3,917 2,603
Net sales to unaffiliated customers (173) 70 292 60
Income (loss) from operations $ (8,064) $ (4,293) $ (21,603) $ (12,759)