Variable Interest Entities - Guarantee and Other Payments Related to PEAKS Program (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Variable Interest Entity [Line Items]
Payments on Behalf of Borrowers	$ 1,832	$ 1,855
PEAKS Program [Member]
Variable Interest Entity [Line Items]
PEAKS Guarantee	40,713	1,239	[1]
Payments on Behalf of Borrowers	1,832	1,855	[2]
Total	$ 42,545	$ 3,094

[1] Of this amount, $854 was paid prior to the Consolidation.

[2] Of this amount, $532 was paid prior to the Consolidation.