Business Segment Information - Revenue By Geographic Location (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Net revenues	$ 674,728	$ 733,555	$ 751,909
United States
Segment Reporting Information [Line Items]
Net revenues	232,661	304,563	297,162
United Kingdom
Segment Reporting Information [Line Items]
Net revenues	100,154	133,005	193,903
Brazil
Segment Reporting Information [Line Items]
Net revenues	154,326	208,565	216,796
West Africa
Segment Reporting Information [Line Items]
Net revenues	126,856	41,840	646
Other
Segment Reporting Information [Line Items]
Net revenues	$ 60,731	$ 45,582	$ 43,402