Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets (Details)

v3.8.0.1
Intangible Assets (Details) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2017
Dec. 31, 2016
Schedule Of Intangible Assets [Line Items]    
Intangible assets subject to amortization, Gross Carrying Amount $ 124,028 $ 124,028
Intangible assets subject to amortization, Accumulated Amortization (61,340) (37,895)
Intangible assets subject to amortization, Net Carrying Amount 62,688 86,133
License (Indefinite-lived) 4,427 4,427
Customer relationships    
Schedule Of Intangible Assets [Line Items]    
Intangible assets subject to amortization, Gross Carrying Amount 120,000 120,000
Intangible assets subject to amortization, Accumulated Amortization (59,298) (36,593)
Intangible assets subject to amortization, Net Carrying Amount $ 60,702 $ 83,407
Weighted- Average Amortization Period (Years) 6 years 6 years
Licenses    
Schedule Of Intangible Assets [Line Items]    
Intangible assets subject to amortization, Gross Carrying Amount $ 3,368 $ 3,368
Intangible assets subject to amortization, Accumulated Amortization (1,382) (807)
Intangible assets subject to amortization, Net Carrying Amount $ 1,986 $ 2,561
Weighted- Average Amortization Period (Years) 5 years 7 months 6 days 5 years 7 months 6 days
Non-compete agreements    
Schedule Of Intangible Assets [Line Items]    
Intangible assets subject to amortization, Gross Carrying Amount $ 660 $ 660
Intangible assets subject to amortization, Accumulated Amortization (660) (495)
Intangible assets subject to amortization, Net Carrying Amount $ 0 $ 165
Weighted- Average Amortization Period (Years) 1 year 1 year