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Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2013
Significant Accounting Policies [Abstract]  
Schedule of tuition receivable and allowance for doubtful accounts
   
December 31,
  
($ in thousands)
  
2012
    
2013
  
Tuition receivable
  
$
29,858
    
$
26,145
  
Allowance for doubtful accounts
    
(6,596
)
    
(10,303
)
Tuition receivable, net
  
$
23,262
    
$
15,842
  
 
Schedule of allowance for doubtful accounts
 
    Year Ended December 31,  
($ in thousands)
   2011     2012     2013  
Beginning allowance for doubtful accounts
  
$
7,935
    
$
7,279
     $
6,596
  
Additions charged to expense
    
24,877
      
23,728
      
22,225
  
Write-offs, net of recoveries
  
 
(25,533
)
  
 
(24,411
)
  
 
(18,518
)
Ending allowance for doubtful accounts
   $ 
7,279
     $
6,596
     $
10,303
  
Schedule of reconciliation of shares used to calculate basic and diluted earnings per share
 
 
 
2011
 
 
2012
 
 
2013
 
Weighted average shares outstanding used to compute basic earnings per share
 
 
11,906
 
 
 
11,390
 
 
 
10,584
 
Incremental shares issuable upon the assumed exercise of stock options
 
 
8
 
 
 
–
 
 
 
–
 
Unvested restricted stock and restricted stock units
 
 
29
 
 
 
50
 
 
 
40
 
Shares used to compute diluted earnings per share
 
 
11,943
 
 
 
11,440
 
 
 
10,624