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Intangible Assets (Tables)
 6 Months Ended
Jun. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill
Changes in the carrying amount of goodwill by reportable business segment for the six months ended June 30, 2015 were as follows (in thousands):
 
Learning
Solutions
 
Professional
& Technical
Services
 
Sandy
 
Performance
Readiness
Solutions
 
Total
Balance as of December 31, 2014
$
53,094

 
$
44,143

 
$
653

 
$
27,867

 
$
125,757

Foreign currency translation
(1,398
)
 
60

 
—

 
17

 
(1,321
)
Balance as of June 30, 2015
$
51,696


$
44,203


$
653


$
27,884


$
124,436
Schedule of Finite-Lived Intangible Assets
The primary assets included in this category and their respective balances were as follows (in thousands):
June 30, 2015
 
 
 
 
 
 
Gross Carrying Amount
 
Accumulated Amortization
 
Net Carrying Amount
 
 
 
Customer relationships
$
20,817

 
$
(13,315
)
 
$
7,502

Intellectual property and other
2,351

 
(1,414
)
 
937

 
$
23,168


$
(14,729
)

$
8,439

 
 
 
 
 
 
December 31, 2014
 

 
 

 
 

Customer relationships
$
22,603

 
$
(13,042
)
 
$
9,561

Intellectual property and other
2,160

 
(1,186
)
 
974

 
$
24,763


$
(14,228
)

$
10,535