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Intangible Assets (Tables)
 9 Months Ended
Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill
Changes in the carrying amount of goodwill by reportable business segment for the nine months ended September 30, 2018 were as follows (in thousands):
 
Workforce Excellence
 
Business Transformation Services
 
Total
Balance as of December 31, 2017
$
105,764

 
$
39,071

 
$
144,835

Acquisitions
21,657

 
10,471

 
32,128

Foreign currency translation
(1,476
)
 
(512
)
 
(1,988
)
Balance as of September 30, 2018
$
125,945


$
49,030


$
174,975
Schedule of Finite-Lived Intangible Assets
The primary assets included in this category and their respective balances were as follows (in thousands):
 
Gross Carrying Amount
 
Accumulated Amortization
 
Net Carrying Amount
September 30, 2018
 
 
Customer relationships
$
22,558

 
$
(7,717
)
 
$
14,841

Intellectual property and other
4,301

 
(1,679
)
 
2,622

 
$
26,859


$
(9,396
)

$
17,463

 
 
 
 
 
 
December 31, 2017
 

 
 

 
 

Customer relationships
$
16,330

 
$
(11,140
)
 
$
5,190

Intellectual property and other
4,298

 
(1,125
)
 
3,173

 
$
20,628


$
(12,265
)

$
8,363