Annual report pursuant to Section 13 and 15(d)

Acquisitions Acquisitions (Details 3)

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Acquisitions Acquisitions (Details 3) (Kentrox [Member], USD $)
In Thousands, unless otherwise specified
12 Months Ended
Mar. 31, 2014
Apr. 02, 2013
Acquired Finite-Lived Intangible Assets [Line Items]    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill   $ 15,980
Backlog [Member]
   
Acquired Finite-Lived Intangible Assets [Line Items]    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill   1,440
Finite-Lived Intangible Asset, Useful Life 1 year  
Customer Relationships [Member]
   
Acquired Finite-Lived Intangible Assets [Line Items]    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill   8,960
Finite-Lived Intangible Asset, Useful Life 10 years  
Trade Names [Member]
   
Acquired Finite-Lived Intangible Assets [Line Items]    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill   1,170
Finite-Lived Intangible Asset, Useful Life 7 years  
Product Technology [Member]
   
Acquired Finite-Lived Intangible Assets [Line Items]    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill   $ 4,410
Finite-Lived Intangible Asset, Useful Life 9 years