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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
6 Months Ended
Jun. 30, 2017
Accounting Policies [Abstract]  
Schedule of Reclassifications
Comparative information for the three and six months ended June 30, 2016 follows:
 
Three Months Ended June 30, 2016
 
As Reported
 
After Reclassification
 
(in thousands except percentages)
United States
$
145,882

 
51.4
%
 
$
147,364

 
51.9
%
United Kingdom
45,016

 
15.9
%
 
45,652

 
16.1
%
Switzerland
32,456

 
11.4
%
 
32,596

 
11.5
%
Canada
15,173

 
5.3
%
 
15,327

 
5.4
%
Russia
10,484

 
3.7
%
 
10,505

 
3.7
%
Germany
9,663

 
3.4
%
 
9,736

 
3.4
%
Hong Kong
5,091

 
1.8
%
 
5,283

 
1.9
%
Sweden
5,888

 
2.1
%
 
6,033

 
2.1
%
Netherlands
3,165

 
1.1
%
 
3,326

 
1.2
%
Belgium
2,529

 
0.9
%
 
2,571

 
0.9
%
Ireland
1,296

 
0.5
%
 
1,304

 
0.5
%
Italy
993

 
0.4
%
 
1,006

 
0.4
%
China
413

 
0.1
%
 
413

 
0.1
%
Other locations
2,657

 
0.9
%
 
2,716

 
0.9
%
Reimbursable expenses and other revenues
3,126

 
1.1
%
 

 
%
Total
$
283,832

 
100.0
%
 
$
283,832

 
100.0
%

 
Six Months Ended June 30, 2016
 
As Reported
 
After Reclassification
 
(in thousands except percentages)
United States
$
281,440

 
51.3
%
 
$
284,003

 
51.8
%
United Kingdom
88,006

 
16.1
%
 
89,212

 
16.3
%
Switzerland
63,221

 
11.5
%
 
63,448

 
11.6
%
Canada
30,874

 
5.6
%
 
31,173

 
5.7
%
Russia
19,436

 
3.5
%
 
19,470

 
3.5
%
Germany
18,369

 
3.4
%
 
18,475

 
3.4
%
Hong Kong
10,845

 
2.0
%
 
11,227

 
2.0
%
Sweden
9,948

 
1.8
%
 
10,161

 
1.9
%
Netherlands
5,712

 
1.0
%
 
5,973

 
1.0
%
Belgium
4,653

 
0.9
%
 
4,723

 
0.9
%
Ireland
2,480

 
0.5
%
 
2,490

 
0.5
%
Italy
1,629

 
0.3
%
 
1,674

 
0.3
%
China
707

 
0.1
%
 
707

 
0.1
%
Other locations
5,422

 
1.0
%
 
5,578

 
1.0
%
Reimbursable expenses and other revenues
5,572

 
1.0
%
 

 
%
Total
$
548,314

 
100.0
%
 
$
548,314

 
100.0
%