Business Segment Information - Revenue By Geographic Location (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Net revenues	$ 159,897	$ 193,490	$ 199,147	$ 181,021	$ 170,749	$ 212,609	$ 201,728	$ 166,823	$ 733,555	$ 751,909	$ 739,818
United States
Segment Reporting Information [Line Items]
Net revenues									304,563	297,162	271,260
United Kingdom
Segment Reporting Information [Line Items]
Net revenues									133,005	193,903	194,434
Brazil
Segment Reporting Information [Line Items]
Net revenues									208,565	216,796	208,054
Other
Segment Reporting Information [Line Items]
Net revenues									$ 87,422	$ 44,048	$ 66,070