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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
9 Months Ended
Sep. 30, 2017
Accounting Policies [Abstract]  
Schedule of Reclassifications
Comparative information for the three and nine months ended September 30, 2016 follows:
 
Three Months Ended September 30, 2016
 
As Reported
 
After Reclassification
 
(in thousands except percentages)
United States
$
153,818

 
51.6
%
 
$
155,241

 
52.0
%
United Kingdom
43,535

 
14.6
%
 
44,179

 
14.8
%
Switzerland
31,550

 
10.6
%
 
31,638

 
10.6
%
Canada
14,526

 
4.9
%
 
14,589

 
4.9
%
Germany
12,325

 
4.1
%
 
12,451

 
4.2
%
Russia
9,833

 
3.3
%
 
9,861

 
3.3
%
Sweden
6,256

 
2.0
%
 
6,506

 
2.2
%
Hong Kong
4,839

 
1.6
%
 
4,991

 
1.7
%
Netherlands
4,302

 
1.4
%
 
4,539

 
1.5
%
Belgium
2,676

 
0.9
%
 
2,699

 
0.9
%
Ireland
1,315

 
0.4
%
 
1,318

 
0.4
%
Italy
1,103

 
0.4
%
 
1,125

 
0.4
%
China
2,050

 
0.7
%
 
2,071

 
0.7
%
United Arab Emirates
1,778

 
0.6
%
 
1,788

 
0.6
%
Other locations
5,228

 
1.8
%
 
5,297

 
1.8
%
Reimbursable expenses and other revenues
3,159

 
1.1
%
 

 
%
Total
$
298,293

 
100.0
%
 
$
298,293

 
100.0
%

 
Nine Months Ended September 30, 2016
 
As Reported
 
After Reclassification
 
(in thousands except percentages)
United States
$
435,258

 
51.4
%
 
$
439,244

 
51.9
%
United Kingdom
131,541

 
15.5
%
 
133,391

 
15.8
%
Switzerland
94,771

 
11.2
%
 
95,086

 
11.2
%
Canada
45,400

 
5.4
%
 
45,762

 
5.4
%
Germany
30,694

 
3.6
%
 
30,926

 
3.7
%
Russia
29,269

 
3.5
%
 
29,331

 
3.5
%
Sweden
16,204

 
1.9
%
 
16,667

 
2.0
%
Hong Kong
15,684

 
1.9
%
 
16,218

 
1.9
%
Netherlands
10,014

 
1.2
%
 
10,512

 
1.2
%
Belgium
7,329

 
0.9
%
 
7,422

 
0.9
%
Ireland
3,795

 
0.4
%
 
3,808

 
0.4
%
Italy
2,732

 
0.3
%
 
2,799

 
0.3
%
China
2,757

 
0.3
%
 
2,778

 
0.3
%
United Arab Emirates
1,778

 
0.2
%
 
1,788

 
0.2
%
Other locations
10,650

 
1.3
%
 
10,875

 
1.3
%
Reimbursable expenses and other revenues
8,731

 
1.0
%
 

 
%
Total
$
846,607

 
100.0
%
 
$
846,607

 
100.0
%