Variable Interest Entities - Guarantee and Other Payments Related to PEAKS Program (Parenthetical) (Detail) - PEAKS Program [Member] $ in Thousands	3 Months Ended
Mar. 31, 2013 USD ($)
Variable Interest Entity [Line Items]
Guarantee payments paid to prior consolidation	$ 854
Payments on behalf of borrowers prior to consolidation	$ 532

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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