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Goodwill and Other Intangibles - Schedule of Finite-Lived Intangible Assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]        
Gross Carrying Value $ 37,640 $ 37,340 $ 39,140 $ 23,300
Accumulated Amortization (16,149) (11,311) (7,395) (2,108)
Net Book Value $ 21,491 $ 26,029 31,745 $ 21,192
Backlog        
Finite-Lived Intangible Assets [Line Items]        
Weighted-Average Useful Life (in years)       1 year
Gross Carrying Value     1,800 $ 1,200
Accumulated Amortization     (1,800) (1,095)
Net Book Value     $ 0 $ 105
Customer relationships        
Finite-Lived Intangible Assets [Line Items]        
Weighted-Average Useful Life (in years) 10 years 18 days 10 years 9 months 7 days 11 years 6 months 11 days 21 years
Gross Carrying Value $ 34,940 $ 34,940 $ 34,940 $ 20,400
Accumulated Amortization (14,915) (10,430) (5,129) (926)
Net Book Value $ 20,025 $ 24,510 $ 29,811 $ 19,474
Developed technology        
Finite-Lived Intangible Assets [Line Items]        
Weighted-Average Useful Life (in years) 4 years 2 months 23 days 8 years 3 months 11 days 8 years 2 months 12 days  
Gross Carrying Value $ 1,000 $ 700 $ 700  
Accumulated Amortization (434) (287) (113)  
Net Book Value $ 566 $ 413 $ 587  
Trade names and trademarks        
Finite-Lived Intangible Assets [Line Items]        
Weighted-Average Useful Life (in years) 6 years 22 days 6 years 9 months 14 days 7 years 6 months 18 days 8 years 3 months 11 days
Gross Carrying Value $ 1,700 $ 1,700 $ 1,700 $ 1,700
Accumulated Amortization (800) (594) (353) (87)
Net Book Value $ 900 $ 1,106 $ 1,347 $ 1,613