Annual report pursuant to Section 13 and 15(d)

Intangible Assets - Summary of Acquired Intangible Assets (Details)

v3.10.0.1
Intangible Assets - Summary of Acquired Intangible Assets (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Finite-Lived Intangible Assets    
Weighted Average Life 13 years  
Gross Carrying Amount $ 206,590 $ 215,043
Accumulated Amortization $ 73,207 61,550
Patents    
Finite-Lived Intangible Assets    
Weighted Average Life 11 years  
Gross Carrying Amount $ 2,146 2,146
Accumulated Amortization $ 1,716 1,629
Non-compete Agreement    
Finite-Lived Intangible Assets    
Weighted Average Life 4 years  
Gross Carrying Amount $ 10,900 10,900
Accumulated Amortization $ 4,680 1,687
Trade Names    
Finite-Lived Intangible Assets    
Weighted Average Life 10 years  
Gross Carrying Amount $ 11,454 11,492
Accumulated Amortization $ 5,182 4,114
Completed and Unpatented Technology    
Finite-Lived Intangible Assets    
Weighted Average Life 10 years  
Gross Carrying Amount $ 36,406 38,114
Accumulated Amortization $ 14,964 11,931
Backlog    
Finite-Lived Intangible Assets    
Weighted Average Life 1 year  
Gross Carrying Amount $ 8,790 14,424
Accumulated Amortization $ 8,790 12,184
Customer Relationships    
Finite-Lived Intangible Assets    
Weighted Average Life 15 years  
Gross Carrying Amount $ 136,894 137,967
Accumulated Amortization $ 37,875 $ 30,005