PEAKS Trust Student Loans - Schedule of Information Regarding Aggregate Changes in Accretable Yield (Detail) (PEAKS Trust Student Loans [Member], USD $) In Thousands, unless otherwise specified	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]
Balance at beginning of period	$ 73,351	$ 99,593	$ 70,580	$ 0
Additions resulting from the Consolidation			0	100,953
Accretion	(3,239)	(4,104)	(6,372)	(5,464)
Reclassification from nonaccretable difference and changes in expected cash flows	(10,183)	3,986	(4,279)	3,986
Balance at end of period	59,929	99,475	59,929	99,475
Analogy [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at beginning of period	44,624	58,111	42,274	0
Additions resulting from the Consolidation			0	58,843
Accretion	(1,897)	(2,216)	(3,700)	(2,948)
Reclassification from nonaccretable difference and changes in expected cash flows	(6,283)	4,638	(2,130)	4,638
Balance at end of period	$ 36,444	$ 60,533	$ 36,444	$ 60,533

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Amount of the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 30

-Section 15

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=27045933&loc=d3e13503-111538

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(2)

-URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544

+ Details

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- Definition

Amount of decrease from accretion of the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.

+ References

+ Details

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- Definition

Amount of additions to the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.

+ References

+ Details

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- Definition

Amount of reclassification (to) from nonaccretable difference (from) to the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.

+ References

+ Details

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