Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Other Intangible Assets Intangible Assets (Details)

v3.7.0.1
Goodwill and Other Intangible Assets Intangible Assets (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Mar. 31, 2017
Acquired Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Accumulated Amortization $ 74,899 $ 70,925
Intangible Assets, Gross (Excluding Goodwill) 159,445 157,103
Intangible Assets, Net (Excluding Goodwill) 84,546 86,178
Developed Technology Rights    
Acquired Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 9,975 9,796
Finite-Lived Intangible Assets, Accumulated Amortization 3,647 3,454
Finite-Lived Intangible Assets, Net 6,328 6,342
Customer Relationships    
Acquired Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 101,044 99,676
Finite-Lived Intangible Assets, Accumulated Amortization 68,317 64,682
Finite-Lived Intangible Assets, Net 32,727 34,994
Other Intangible Assets    
Acquired Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 2,631 2,626
Finite-Lived Intangible Assets, Accumulated Amortization 2,340 2,268
Finite-Lived Intangible Assets, Net 291 358
Certification Marks    
Acquired Finite-Lived Intangible Assets [Line Items]    
Indefinite-Lived Intangible Assets (Excluding Goodwill) $ 449 $ 442