REVENUE (Tables)

9 Months Ended

Sep. 30, 2020

Revenue from Contract with Customer [Abstract]

Schedule of revenue

The components of revenue were as follows:

	Three months ended September 30,				Nine months ended September 30,
(in thousands)	2020		2019		2020		2019
Service revenue	$	85,386	$	133,781	$	289,570	$	489,300
Reimbursable expenses	2,810		7,213		14,495		16,484
Non-controlling interests	599		499		1,516		2,179
Total	$	88,795	$	141,493	$	305,581	$	507,963

Disaggregation of revenue

Disaggregation of total revenues by major source is as follows:

(in thousands)	Revenue recognized when services are performed or assets are sold		Revenue related to technology platforms and professional services		Reimbursable expenses revenue		Total revenue
Three months ended September 30, 2020	$	82,067	$	3,918	$	2,810	$	88,795
Three months ended September 30, 2019	125,939		8,341		7,213		141,493
Nine months ended September 30, 2020	277,522		13,564		14,495		305,581
Nine months ended September 30, 2019	452,643		38,836		16,484		507,963