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Basis of Presentation and Significant Accounting Policies - Intangible Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 42,160 $ 46,919
Accumulated Amortization (34,263) (29,948)
Total 7,897 16,971
Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 28,300 32,890
Accumulated Amortization (26,324) (23,946)
Total 1,976 8,944
Intellectual property    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 13,860 14,029
Accumulated Amortization (7,939) (6,002)
Total $ 5,921 $ 8,027