REVENUE COST OF REVENUE (Tables)

12 Months Ended

Dec. 31, 2015

Revenues [Abstract]

Schedule of revenue [Table Text Block]

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

(in thousands)	2015		2014		2013
Service revenue	$	940,920	$	938,679	$	662,059
Reimbursable expenses	107,344		137,634		102,478
Non-controlling interests	3,202		2,603		3,820
Total	$	1,051,466	$	1,078,916	$	768,357