Business Segment Information - Revenue By Geographic Location (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Net revenues	$ 170,749	$ 212,609	$ 201,728	$ 166,823	$ 158,356	$ 212,575	$ 204,625	$ 164,262	$ 751,909	$ 739,818	$ 581,383
United States
Segment Reporting Information [Line Items]
Net revenues									297,162	271,260	283,933
United Kingdom
Segment Reporting Information [Line Items]
Net revenues									193,903	194,434	155,954
Brazil
Segment Reporting Information [Line Items]
Net revenues									216,796	208,054	70,710
Other
Segment Reporting Information [Line Items]
Net revenues									$ 44,048	$ 66,070	$ 70,786