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
Dec. 31, 2013
Mar. 31, 2013
Acquired Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Accumulated Amortization $ (48,379) $ (40,356)
Intangible Assets, Net (Excluding Goodwill) 123,177 131,916
Intangible Assets, Gross (Excluding Goodwill) 171,556 172,272
Developed Technology Rights [Member]
    
Acquired Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 10,919 10,929
Finite-Lived Intangible Assets, Accumulated Amortization (2,062) (1,659)
Finite-Lived Intangible Assets, Net 8,857 9,270
Customer Relationships [Member]
    
Acquired Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 100,825 101,355
Finite-Lived Intangible Assets, Accumulated Amortization (35,281) (27,723)
Finite-Lived Intangible Assets, Net 65,544 73,632
Order or Production Backlog [Member]
    
Acquired Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 10,038 10,167
Finite-Lived Intangible Assets, Accumulated Amortization (10,038) (10,167)
Finite-Lived Intangible Assets, Net 0 0
Other Intangible Assets [Member]
    
Acquired Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 1,630 1,630
Finite-Lived Intangible Assets, Accumulated Amortization (998) (807)
Finite-Lived Intangible Assets, Net 632 823
Trademarks [Member]
    
Acquired Finite-Lived Intangible Assets [Line Items]    
Indefinite-Lived Intangible Assets (Excluding Goodwill) 47,646 47,693
Certification Marks [Member]
    
Acquired Finite-Lived Intangible Assets [Line Items]    
Indefinite-Lived Intangible Assets (Excluding Goodwill) $ 498 $ 498