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Significant Accounting Policies (Tables)
 9 Months Ended
Sep. 30, 2015
Significant Accounting Policies [Abstract]  
Schedule of graduation fund liability
Balance at December 31, 2014 $9,706 
Revenue deferred  12,423 
Benefit redeemed  (3,974)
Balance at September 30, 2015 $18,155
Schedule of tuition receivable and allowance for doubtful accounts
  

December 31,

2014

  

September 30,

2015

 
Tuition receivable $25,777  $26,840 
Allowance for doubtful accounts  (8,835)  (9,776)
Tuition receivable, net $16,942  $17,064
Schedule of allowance for doubtful accounts
  For the three months 
ended September 30,		  For the nine months 
ended September 30,		 
  2014  2015  2014  2015 
Allowance for doubtful accounts, beginning of period $9,144  $8,733  $10,303  $8,835 
Additions charged to expense  3,652   2,293   12,255   9,315 
Write-offs, net of recoveries  (4,228)  (1,250)  (13,990)  (8,374)
Allowance for doubtful accounts, end of period $8,568  $9,776  $8,568  $9,776
Schedule of reconciliation of shares used to calculate basic and diluted earnings per share
  For the three months 
ended
September 30,		  For the nine months 
ended
September 30,		 
  2014  2015  2014  2015 
Weighted average shares outstanding used to compute basic earnings per share  10,571   10,593   10,555   10,586 
Unvested restricted stock  92   143   67   140 
Shares used to compute diluted earnings per share  10,663   10,736   10,622   10,726