Annual report pursuant to Section 13 and 15(d)

Goodwill and Intangible Assets (Details)

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Goodwill and Intangible Assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Schedule Of Intangible Assets [Line Items]    
Gross Carrying Amount $ 120,750 $ 123,368
Accumulated Amortization (110,500) (94,630)
Net Carrying Amount 10,250 28,738
Customer relationships    
Schedule Of Intangible Assets [Line Items]    
Gross Carrying Amount 120,000 120,000
Accumulated Amortization (110,169) (91,756)
Net Carrying Amount $ 9,831 $ 28,244
Weighted- Average Amortization Period (Years) 6 years 6 years
Licenses    
Schedule Of Intangible Assets [Line Items]    
Gross Carrying Amount $ 750 $ 3,368
Accumulated Amortization (331) (2,874)
Net Carrying Amount $ 419 $ 494
Weighted- Average Amortization Period (Years) 10 years 5 years 7 months 6 days