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Schedule II-Valuation and Qualifying Accounts
12 Months Ended
Dec. 31, 2011
Schedule II-Valuation and Qualifying Accounts [Abstract]  
Schedule II-Valuation and Qualifying Accounts
Schedule II-Valuation and Qualifying Accounts
 
          (in thousands)
Description
 
Balance at Beginning of Period
  
Charged to Expense
  
Accounts Written-off
  
Balance at End of Period
 
Allowance accounts for the year ended:
            
              
December 31, 2011
Student receivable allowance
 $26,993  $30,553  $(35,688) $21,858 
December 31, 2010
Student receivable allowance
 $26,859  $39,106  $(38,972) $26,993 
December 31, 2009
Student receivable allowance
 $14,738  $36,982  $(24,861) $26,859