Contingencies - Aggregate Amount of Guarantee Payments, Discharge Payments and Payments on Behalf of Borrowers (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Schedule of Claims and Contingencies [Line Items]
Payments on Behalf of Borrowers	$ 1,832	$ 1,855
Recoveries from Charged-Off Loans	0	(103)
PEAKS Program [Member]
Schedule of Claims and Contingencies [Line Items]
PEAKS Guarantee	40,713	1,239	[1]
Payments on Behalf of Borrowers	1,832	1,855	[2]
Total	42,545	3,094
2009 RSA [Member]
Schedule of Claims and Contingencies [Line Items]
Regular Payments	1,158	306
Discharge Payments	0	0
Recoveries from Charged-Off Loans	0	(103)
Total	$ 43,703	$ 3,297

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

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