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Intangible Assets
9 Months Ended
Sep. 30, 2014
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, 2014 were as follows (in thousands):
 
 
Learning
Solutions
 
Professional
& Technical
Services
 
Sandy
 
Performance
Readiness
Solutions
 
Energy
Services
 
Total
Balance as of December 31, 2013
$
60,187

 
$
37,690

 
$
653

 
$
9,795

 
$
8,662

 
$
116,987

Acquisitions
12,338

 

 

 

 

 
12,338

Foreign currency translation
(1,773
)
 

 

 

 
(38
)
 
(1,811
)
Balance as of September 30, 2014
$
70,752


$
37,690


$
653


$
9,795


$
8,624


$
127,514


 
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):
 
September 30, 2014
 
 
 
 
 
 
Gross Carrying
 
Accumulated
 
Net Carrying
 
Amount
 
Amortization
 
Amount
Customer relationships
$
27,672

 
$
(16,655
)
 
$
11,017

Tradenames
191

 
(191
)
 

Intellectual property and other
2,355

 
(1,211
)
 
1,144

 
$
30,218


$
(18,057
)

$
12,161

 
 
 
 
 
 
December 31, 2013
 

 
 

 
 

Customer relationships
$
26,470

 
$
(13,070
)
 
$
13,400

Tradenames
191

 
(119
)
 
72

Intellectual property and other
2,364

 
(707
)
 
1,657

 
$
29,025


$
(13,896
)

$
15,129