PEAKS Trust Student Loans - Schedule of Information Regarding Changes in Allowance for Loan Losses (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision for loan losses	$ 9,071	$ 4,319	$ 9,071	$ 4,319
PEAKS Trust [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at beginning of period	29,349	0	29,349	0
Loans charged off	0	0	0	0
Recoveries from charged off loans	0	0	0	0
Provision for loan losses	9,071	4,319	9,071	4,319
Balance at end of period	$ 38,420	$ 4,319	$ 38,420	$ 4,319