Variable Interest Entities - Guarantee and Other Payments Related to PEAKS Program (Detail) (USD $) In Thousands, unless otherwise specified	2 Months Ended	10 Months Ended	12 Months Ended
	Feb. 28, 2013	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2012
Variable Interest Entity [Line Items]
Payments on Behalf of Borrowers			$ 11,499	$ 2,762
PEAKS Program [Member]
Variable Interest Entity [Line Items]
PEAKS Guarantee	854	1,559	2,413	12,342
Payments on Behalf of Borrowers	532	10,967	11,499	2,762
Total	$ 1,386	$ 12,526	$ 13,912	$ 15,104