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GOODWILL AND LONG-LIVED ASSETS (Tables)
3 Months Ended
Mar. 31, 2015
GOODWILL AND LONG-LIVED ASSETS [Abstract]  
Changes in carrying amount of goodwill
The carrying amount of goodwill at March 31, 2015 is as follows:

  
Gross
Goodwill
Balance
  
Accumulated
Impairment
Losses
  
Net
Goodwill
Balance
 
Balance as of January 1, 2015
 
$
115,872
  
$
(93,665
)
 
$
22,207
 
Adjustments
  
-
   
-
   
-
 
Balance as of March 31, 2015
 
$
115,872
  
$
(93,665
)
 
$
22,207
 
Summary of finite-lived and indefinite-lived intangible assets
Intangible assets, which are included in other assets in the accompanying condensed consolidated balance sheets, consist of the following:

  
Trade
Name
  
Accreditation
  
Curriculum
  
Total
 
Gross carrying amount at December 31, 2014
 
$
310
  
$
1,063
  
$
550
  
$
1,923
 
Adjustments
  
-
   
-
   
-
   
-
 
Gross carrying amount at March 31, 2015
  
310
   
1,063
   
550
   
1,923
 
                 
Accumulated amortization at December 31, 2014
  
264
   
-
   
469
   
733
 
Amortization
  
11
   
-
   
6
   
17
 
Accumulated amortization at March 31, 2015
  
275
   
-
   
475
   
750
 
                 
Net carrying amount at March 31, 2015
 
$
35
  
$
1,063
  
$
75
  
$
1,173
 
                 
Weighted average amortization period (years)
  
7
  
Indefinite
   
10
     
Summary of estimated future amortization expense
The following table summarizes the estimated future amortization expense:

Year Ending December 31,
  
Remainder of 2015
 
$
48
 
2016
  
21
 
2017
  
20
 
2018
  
20
 
2019
  
1
 
Thereafter
  
-
 
     
  
$
110