Revenues - Disaggregation of Revenues by Geographic Location (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue from External Customer [Line Items]
Revenues	$ 213,699	$ 228,805	$ 643,006	$ 648,735
United States
Revenue from External Customer [Line Items]
Revenues	193,639	206,709	579,425	582,540
Rest of world
Revenue from External Customer [Line Items]
Revenues	$ 20,060	$ 22,096	$ 63,581	$ 66,195