REVENUE REVENUE (Tables)

12 Months Ended

Dec. 31, 2016

Revenues [Abstract]

Schedule of revenue

The components of revenue were as follows for the years ended December 31:

(in thousands)	2016		2015		2014
Service revenue	$	942,599	$	940,920	$	938,679
Reimbursable expenses	52,011		107,344		137,634
Non-controlling interests	2,693		3,202		2,603
Total	$	997,303	$	1,051,466	$	1,078,916