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Student Receivables - Changes in Current and Non-Current Receivables Allowance (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Receivables [Abstract]      
Balance, Beginning of Period $ 39,865 $ 56,325 $ 83,028
Charges to Expense 27,641 37,949 50,699
Amounts Written-off (39,419) (54,409) (77,402)
Balance, End of Period $ 28,087 $ 39,865 $ 56,325