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GOODWILL AND INTANGIBLE ASSETS (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Oct. 27, 2012 | Oct. 29, 2011 | Oct. 27, 2012 | Oct. 29, 2011 | Apr. 28, 2012
Goodwill [Roll Forward] |  |  |  |  |
Balance | $ 16,422 | $ 16,422 | $ 16,422 | $ 16,422 |
Attributable to acquisitions | 794 | 0 | 794 | 0 |
Balance | 17,216 | 16,422 | 17,216 | 16,422 |
Gross | 42,414 |  | 42,414 |  | 41,249
Accumulated Amortization | 24,932 |  | 24,932 |  | 24,629
Net | 17,482 |  | 17,482 |  | 16,620
Indefinite-lived trade names | 1,800 |  | 1,800 |  | 1,800
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] |  |  |  |  |
2013 | 1,738 |  | 1,738 |  |
2014 | 1,815 |  | 1,815 |  |
2015 | 1,747 |  | 1,747 |  |
2016 | 1,538 |  | 1,538 |  |
2017 | 1,474 |  | 1,474 |  |
Customer relationships and agreements |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |
Gross | 16,522 |  | 16,522 |  | 14,995
Accumulated Amortization | 13,853 |  | 13,853 |  | 13,720
Net | 2,669 |  | 2,669 |  | 1,275
Wtd. Avg. Remaining Amortization Periods | 11 years 2 months 12 days |  | 11 years 2 months 12 days |  | 11 years 8 months 12 days
Trade names, patents and technology licences |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |
Gross | 25,774 |  | 25,774 |  | 25,774
Accumulated Amortization | 11,079 |  | 11,079 |  | 10,429
Net | 14,695 |  | 14,695 |  | 15,345
Wtd. Avg. Remaining Amortization Periods | 11 years 3 months 18 days |  | 11 years 3 months 18 days |  | 11 years 9 months 18 days
Covenants not to compete |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |
Write-off of fully amortized intangible assets | 480 |  |  |  |
Gross | 118 |  | 118 |  | 480
Accumulated Amortization | 0 |  | 0 |  | 480
Net | 118 |  | 118 |  | 0
Interconnect |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |
Balance | 11,146 | 11,146 | 11,146 | 11,146 |
Attributable to acquisitions | 794 | 0 | 794 | 0 |
Balance | 11,940 | 11,146 | 11,940 | 11,146 |
Power Products |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |
Balance | 5,276 | 5,276 | 5,276 | 5,276 |
Attributable to acquisitions | 0 | 0 | 0 | 0 |
Balance | $ 5,276 | $ 5,276 | $ 5,276 | $ 5,276 |

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