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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, 2012
Dec. 31, 2011
Dec. 31, 2010
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Balance, Beginning of Period $ 63,962 $ 88,961 [1] $ 52,385 [1]
Charges to Expense 39,948 [2] 54,825 [2] 104,371 [1],[2]
Amounts Written-off (56,678) (79,824) (67,795) [1]
Balance, End of Period $ 47,232 $ 63,962 $ 88,961 [1]
[1] In the first and third quarters of 2010, we increased the reserve rates applied to outstanding student receivables balances attributed to our student extended payment plans and our previously terminated recourse loan programs. The increases resulted from lower repayment history experienced on these programs. The bad debt reserve rates are continually reviewed for appropriateness based upon historical repayment data as it becomes available.
[2] Charges to expense include an offset for recoveries of amounts previously written off of $10.1 million, $10.0 million and $9.6 million for the years ended December 31, 2012, 2011 and 2010, respectively.