Revenue Recognition - Narrative (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Unbilled receivables	$ 139,516	$ 140,318
Performance obligation	69,400
Receivables (Included in Trade Receivables)
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Unbilled receivables	$ 92,500	$ 98,200