This item represents the amount of the total change in unrealized (holding) gains or losses for the period which are included in the statement of income (or changes in net assets) in trading revenue. Such unrealized (holding) gains or losses relate to those liabilities still held at the reporting date for which fair value is measured on a recurring basis using significant unobservable inputs (Level 3).

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 157

-Paragraph 32

-Subparagraph d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

Amount of gain (loss) recognized in earnings, arising from liabilities measured at fair value on a recurring basis using unobservable inputs (level 3).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 157

-Paragraph 32

-Subparagraph c(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

Issues that have taken place during the period in relation to liabilities measured at fair value and categorized within Level 3 of the fair value hierarchy.

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- Definition

Purchases that have taken place during the period in relation to liabilities measured at fair value and categorized within Level 3 of the fair value hierarchy.

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- Definition

Sales that have taken place during the period in relation to liabilities measured at fair value and categorized within Level 3 of the fair value hierarchy.

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- Definition

Settlements that have taken place during the period in relation to liabilities measured at fair value and categorized within Level 3 of the fair value hierarchy.

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- Definition

This element represents [net] transfers in to and out of liabilities measured at fair value on a recurring basis using unobservable inputs (Level 3) which have taken place during the period.

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No definition available.

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- Definition

This element represents a liability measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances.

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Fair Value Disclosures - Summary of Changes in Fair Value of Financial Liabilities Classified as Level 3 (Detail) (USD $)	3 Months Ended									3 Months Ended
	Feb. 28, 2014	Feb. 28, 2013	Feb. 28, 2014 Corporate equity securities [Member]	Feb. 28, 2014 Net derivatives [Member]	Feb. 28, 2014 Loans [Member]	Feb. 28, 2014 Other secured financing [Member]	Feb. 28, 2013 Predecessor [Member]	Feb. 28, 2013 Predecessor [Member] Corporate equity securities [Member]	Nov. 30, 2012 Predecessor [Member] Corporate equity securities [Member]	Feb. 28, 2013 Predecessor [Member] Residential mortgage-backed securities [Member]	Feb. 28, 2013 Predecessor [Member] Net derivatives [Member]	Feb. 28, 2013 Predecessor [Member] Loans [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance			$ 38,000	$ 6,905,000	$ 22,462,000	$ 8,711,000		$ 38,000	$ 38,000		$ 9,188,000	$ 1,711,000
Total gains/losses (realized and unrealized)	1,100,000	2,700,000	8,000	1,267,000	(153,000)					25,000	2,648,000
Purchases				(1,327,000)	(18,913,000)					(73,846,000)		(1,711,000)
Sales			411,000	2,169,000	4,887,000					75,363,000		7,398,000
Settlements				197,000
Issuances						21,663,000	0
Net transfers into/ (out of) Level 3			558,000	(3,438,000)	1,977,000						(651,000)
Ending Balance			1,015,000	5,773,000	10,260,000	30,374,000		38,000	38,000	1,542,000	11,185,000	7,398,000
Change in unrealized gains/(losses) relating to instruments still held			$ (8,000)	$ (1,267,000)	$ (153,000)					$ (19,000)	$ 2,648,000