Variable Interest Entities - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended			3 Months Ended	12 Months Ended		1 Months Ended	12 Months Ended	0 Months Ended	3 Months Ended	12 Months Ended	0 Months Ended	12 Months Ended		1 Months Ended	12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 2009 RSA [Member]	Dec. 31, 2013 2009 RSA [Member] Installment	Dec. 31, 2012 2009 RSA [Member]	Apr. 30, 2013 PEAKS Guarantee [Member]	Dec. 31, 2012 PEAKS Guarantee [Member]	Oct. 09, 2014 PEAKS Guarantee [Member] Subsequent Event [Member]	Sep. 30, 2014 PEAKS Guarantee [Member] Subsequent Event [Member]	Dec. 31, 2013 PEAKS Guarantee [Member] 2014 Payment [Member]	Feb. 28, 2013 PEAKS Trust Student Loans [Member]	Dec. 31, 2013 PEAKS Trust Student Loans [Member]	Dec. 31, 2012 PEAKS Trust Student Loans [Member]	Jan. 31, 2014 PEAKS Trust Student Loans [Member] Subsequent Event [Member]	Dec. 31, 2013 PEAKS Trust Student Loans [Member] 2014 Payment [Member]	Dec. 31, 2013 2009 Entity [Member]
Variable Interest Entity [Line Items]
Imputed interest rate										9.00%
Subordinated Note, maturity date									2026-03
Subordinated Notes					$ 73,000					$ 73,000
Impairment charge					15,166	0	0	0	0	15,166	0	4,900										10,300
Carrying value of Revolving note	76,479				0				76,479	0		2,900	2,500	2,900						104,834	76,479	0
Payments under PEAKS guarantee															60,340	12,342	50,000	51,700	159,500
Amount of liabilities exceeding fair value assets																				112,748
Reduction amount on recognized as loss on offset																				39,500
(Loss) on consolidation of PEAKS Trust	0	0	0	(73,248)					(73,248)	0	0										73,248
Payments on Behalf of Borrowers									11,499	2,762													1,832		8,600
Prepayment of Senior debt																								40,000
Number of monthly payments													10
Discount rate													10.00%
Offset amounts relating to guarantee obligations									9,091																9,091
Amounts relating to discharge payments									6,786
Recoveries from Charged-Off Loans									103	234			(103)	(234)											574
Advances to 2009 Entity									0	0
Revolving note, amount owned to company	8,200				8,300				8,200	8,300
Carrying value of subordinated note and revolving note prior to impairment charge													$ 7,800