Related Parties - Revenues and Expenses (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Revenue
Total revenue		$ 247,285	$ 197,756
Expenses
Cost of revenue (exclusive of depreciation and amortization expenses presented separately below)	[1]	175,653	117,441
Selling, general and administrative expenses	[1]	54,698	74,838
Affiliated Entity
Expenses
Cost of revenue (exclusive of depreciation and amortization expenses presented separately below)		3,247	7,830
Selling, general and administrative expenses		70	156
Transformation services
Revenue
Total revenue	[1]	5,238	3,353
Transformation services | Affiliated Entity
Revenue
Total revenue		1,700	1,159
Platform and operations services
Revenue
Total revenue	[1]	209,900	147,292
Platform and operations services | Affiliated Entity
Revenue
Total revenue		$ 67,948	$ 12,944

[1] See Note 18 for amounts attributable to related parties included in these line items.