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
Sep. 30, 2016
Mar. 31, 2016
Acquired Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Accumulated Amortization $ 65,589 $ 59,986
Intangible Assets, Gross (Excluding Goodwill) 158,645 163,984
Intangible Assets, Net (Excluding Goodwill) 93,056 103,998
Developed Technology Rights    
Acquired Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 9,913 9,950
Finite-Lived Intangible Assets, Accumulated Amortization 3,236 2,988
Finite-Lived Intangible Assets, Net 6,677 6,962
Customer Relationships    
Acquired Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 100,578 105,720
Finite-Lived Intangible Assets, Accumulated Amortization 59,884 54,913
Finite-Lived Intangible Assets, Net 40,694 50,807
Other Intangible Assets    
Acquired Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 2,629 2,631
Finite-Lived Intangible Assets, Accumulated Amortization 2,088 1,848
Finite-Lived Intangible Assets, Net 541 783
Trademarks    
Acquired Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 45,078 45,234
Finite-Lived Intangible Assets, Accumulated Amortization 381 237
Finite-Lived Intangible Assets, Net 44,697 44,997
Certification Marks    
Acquired Finite-Lived Intangible Assets [Line Items]    
Indefinite-Lived Intangible Assets (Excluding Goodwill) $ 447 $ 449