Business Segments - Revenue by Segment (Details) - USD ($) $ in Thousands	3 Months Ended								6 Months Ended		9 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	Jun. 30, 2019	Jun. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Revenue from third parties													$ 1,157,834	$ 1,121,106	$ 1,138,370
Revenue from other segments													0	0	0
Total revenue	$ 319,074	$ 287,688	$ 283,861	$ 267,211	$ 293,977	$ 270,844	$ 281,988	$ 274,297	$ 551,072	$ 556,285	$ 838,760	$ 827,129	1,157,834	1,121,106	1,138,370
Adjusted EBITDA													49,045	27,315	57,494
Capital expenditures											$ 10,135		13,378	11,263	12,483
Operating Segments | North America
Segment Reporting Information [Line Items]
Revenue from third parties													826,355	777,202	780,520
Revenue from other segments													4,463	3,200	5,469
Total revenue													830,818	780,402	785,989
Adjusted EBITDA													85,662	61,250	73,790
Capital expenditures													10,525	8,649	8,610
Operating Segments | EMEA
Segment Reporting Information [Line Items]
Revenue from third parties													250,719	260,729	265,669
Revenue from other segments													9,302	9,500	13,444
Total revenue													260,021	270,229	279,113
Adjusted EBITDA													12,051	6,355	15,293
Capital expenditures													2,815	2,609	3,873
Operating Segments | LATAM
Segment Reporting Information [Line Items]
Revenue from third parties													80,760	83,175	92,181
Revenue from other segments													22	217	1,693
Total revenue													80,782	83,392	93,874
Adjusted EBITDA													1,943	3,082	4,278
Capital expenditures													38	5	0
Other
Segment Reporting Information [Line Items]
Revenue from third parties													0	0	0
Revenue from other segments													(13,787)	(12,917)	(20,606)
Total revenue													(13,787)	(12,917)	(20,606)
Adjusted EBITDA													(50,611)	(43,372)	(35,867)
Capital expenditures													$ 0	$ 0	$ 0