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Schedule II-Valuation and Qualifying Accounts
 12 Months Ended
Dec. 31, 2012
Schedule II-Valuation and Qualifying Accounts [Abstract]  
Schedule II-Valuation and Qualifying Accounts
Schedule II—Valuation and Qualifying Accounts
 
(in thousands, continuing and discontinued operations)

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, 2012
 $21,858  $21,056  $(24,085) $18,829 
Student receivable allowance
                
December 31, 2011
 $26,993  $30,553  $(35,688) $21,858 
Student receivable allowance
                
December 31, 2010
 $26,859  $39,106  $(38,972) $26,993 
Student receivable allowance