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Intangible Assets
9 Months Ended
Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets
Intangible Assets

Goodwill
 
Changes in the carrying amount of goodwill by reportable business segment for the nine months ended September 30, 2017 were as follows (in thousands):
 
Learning
Solutions
 
Professional
& Technical
Services
 
Sandy Training & Marketing
 
Performance
Readiness
Solutions
 
Total
Balance as of December 31, 2016
$
49,079

 
$
42,364

 
$
653

 
$
35,676

 
$
127,772

Acquisitions
6,384

 

 

 
6,301

 
12,685

Foreign currency translation
3,041

 
616

 

 
260

 
3,917

Balance as of September 30, 2017
$
58,504


$
42,980


$
653


$
42,237


$
144,374


 
Intangible Assets Subject to Amortization
 
Intangible assets with finite lives are subject to amortization over their estimated useful lives. 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, 2017
 
 
Customer relationships
$
16,280

 
$
(10,385
)
 
$
5,895

Intellectual property and other
4,298

 
(875
)
 
3,423

 
$
20,578


$
(11,260
)

$
9,318

 
 
 
 
 
 
December 31, 2016
 

 
 

 
 

Customer relationships
$
14,595

 
$
(9,855
)
 
$
4,740

Intellectual property and other
2,311

 
(1,226
)
 
1,085

 
$
16,906


$
(11,081
)

$
5,825