Private Education Loans - Schedule of Information Regarding Changes in Allowance for Loan Losses (Detail) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2016		Jun. 30, 2015	Jun. 30, 2016		Jun. 30, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision (benefit) for loan losses	$ 1,169		$ 3,313	$ 3,047		$ 4,557
CUSO Student Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at beginning of period	2,412		2,480	1,796		2,039
Loans charged off	0		0	0		0
Recoveries from charged off loans	0		0	0		0
Provision (benefit) for loan losses	329	[1]	(1,302)	945	[2]	(861)
Balance at end of period	2,741		1,178	2,741		1,178
PEAKS Trust Student Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at beginning of period	17,122		39,596	21,816		42,353
Loans charged off	(5,059)		(7,898)	(11,966)		(11,959)
Recoveries from charged off loans	766		608	1,496		1,109
Provision (benefit) for loan losses	1,063		4,615	2,546		5,418
Balance at end of period	$ 13,892		$ 36,921	$ 13,892		$ 36,921

[1] The provision for private education loan losses shown on our Condensed Consolidated Statements of Operations was reduced by $223 for recoveries from CUSO Student Loans that were not recognized on our consolidated balance sheet at the time of the CUSO Consolidation.

[2] The provision for private education loan losses shown on our Condensed Consolidated Statements of Operations was reduced by $444 for recoveries from CUSO Student Loans that were not recognized on our consolidated balance sheet at the time of the CUSO Consolidation.