Revenues - Dissagregation of Revenues by Geographic Region (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Revenues	$ 892,208	$ 897,027	$ 787,309
United States
Disaggregation of Revenue [Line Items]
Revenues	797,602	806,900	685,881
Rest of world
Disaggregation of Revenue [Line Items]
Revenues	$ 94,606	$ 90,127	$ 101,428