Revenue Recognition - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Receivables, included in trade receivables	$ 136,332	$ 83,188
Unbilled receivables	140,534	83,502
Performance obligation	111,100
Receivables (Included in Trade Receivables)
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Receivables, included in trade receivables	136,300	83,200
Unbilled receivables	$ 83,200	$ 57,000