Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Other Intangible Assets Intangible Assets (Details)

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Goodwill and Other Intangible Assets Intangible Assets (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Mar. 31, 2014
Acquired Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Accumulated Amortization $ (53,805) $ (50,486)
Intangible Assets, Gross (Excluding Goodwill) 171,131 169,403
Intangible Assets, Net (Excluding Goodwill) 117,326 118,917
Developed Technology Rights
    
Acquired Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 10,887 10,781
Finite-Lived Intangible Assets, Accumulated Amortization (2,324) (2,167)
Finite-Lived Intangible Assets, Net 8,563 8,614
Customer Relationships
    
Acquired Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 100,594 99,578
Finite-Lived Intangible Assets, Accumulated Amortization (40,340) (37,383)
Finite-Lived Intangible Assets, Net 60,254 62,195
Order or Production Backlog
    
Acquired Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 10,015 9,874
Finite-Lived Intangible Assets, Accumulated Amortization (10,015) (9,874)
Finite-Lived Intangible Assets, Net 0 0
Other Intangible Assets
    
Acquired Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 1,630 1,630
Finite-Lived Intangible Assets, Accumulated Amortization (1,126) (1,062)
Finite-Lived Intangible Assets, Net 504 568
Trademarks
    
Acquired Finite-Lived Intangible Assets [Line Items]    
Indefinite-Lived Intangible Assets (Excluding Goodwill) 47,508 47,042
Certification Marks
    
Acquired Finite-Lived Intangible Assets [Line Items]    
Indefinite-Lived Intangible Assets (Excluding Goodwill) $ 497 $ 498