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Student Receivables - Changes in Current and Non-Current Receivables Allowance (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Receivables [Abstract]        
Balance, Beginning of Period $ 33,460 $ 46,229 $ 40,154 $ 57,232
Charges to Expense 7,884 10,847 21,187 27,240
Amounts Written-off (10,101) (15,180) (30,098) (42,576)
Balance, End of Period $ 31,243 $ 41,896 $ 31,243 $ 41,896