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REVENUE REVENUE (Tables)
 3 Months Ended
Mar. 31, 2017
Revenue [Abstract]  
Schedule of revenue
The components of revenue were as follows for the three months ended March 31:
(in thousands)
 
2017
 
2016
 
 
 
 
 
Service revenue
 
$
229,839

 
$
234,280

Reimbursable expenses
 
10,029

 
15,454

Non-controlling interests
 
615

 
398

 
 
 
 
 
Total
 
$
240,483

 
$
250,132