Derivative Financial Instruments - Remaining Contract Maturity of Fair Value of OTC Derivative Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Nov. 30, 2013
Remaining Contract Maturity Of Fair Value Of Over Counter Derivative Assets And Liabilities [Line Items]
Total OTC derivative assets included in Financial instruments owned	$ 426,650
Successor [Member]
Remaining Contract Maturity Of Fair Value Of Over Counter Derivative Assets And Liabilities [Line Items]
OTC derivative assets having maturity period of 0 to 12 months	234,916
OTC derivative assets having maturity period of 1 to 5 years	127,752
OTC derivative assets having maturity period of greater than 5 years	129,448
OTC derivative assets cross-maturity netting	(63,380)
Total OTC derivative assets, net of cross-maturity netting	428,736
Cross product counterparty netting	(2,086)
Total OTC derivative assets included in Financial instruments owned	426,650
OTC derivative liabilities having maturity period of 0 to 12 months	215,742
OTC derivative liabilities having maturity period of 1 to 5 years	175,352
OTC derivative liabilities having maturity period of greater than 5 years	141,278
OTC derivative liabilities cross-maturity netting	(60,796)
Total OTC derivative liabilities, net of cross-maturity netting	471,576
Cross product counterparty netting	(2,086)
Total OTC derivative liabilities included in Financial instruments sold, not yet purchased	469,490
Successor [Member] | Commodity swaps, options and forwards [Member]
Remaining Contract Maturity Of Fair Value Of Over Counter Derivative Assets And Liabilities [Line Items]
OTC derivative assets having maturity period of 0 to 12 months	43,519
OTC derivative assets having maturity period of 1 to 5 years	699
OTC derivative assets having maturity period of greater than 5 years
OTC derivative assets cross-maturity netting	(198)
Total OTC derivative assets, net of cross-maturity netting	44,020
OTC derivative liabilities having maturity period of 0 to 12 months	69,380
OTC derivative liabilities having maturity period of 1 to 5 years	203
OTC derivative liabilities having maturity period of greater than 5 years
OTC derivative liabilities cross-maturity netting	(198)
Total OTC derivative liabilities, net of cross-maturity netting	69,385
Successor [Member] | Credit default swaps [Member]
Remaining Contract Maturity Of Fair Value Of Over Counter Derivative Assets And Liabilities [Line Items]
OTC derivative assets having maturity period of 0 to 12 months
OTC derivative assets having maturity period of 1 to 5 years
OTC derivative assets having maturity period of greater than 5 years	413
OTC derivative assets cross-maturity netting
Total OTC derivative assets, net of cross-maturity netting	413
OTC derivative liabilities having maturity period of 0 to 12 months	174
OTC derivative liabilities having maturity period of 1 to 5 years	3,539
OTC derivative liabilities having maturity period of greater than 5 years	1,263
OTC derivative liabilities cross-maturity netting
Total OTC derivative liabilities, net of cross-maturity netting	4,976
Successor [Member] | Equity swaps and options [Member]
Remaining Contract Maturity Of Fair Value Of Over Counter Derivative Assets And Liabilities [Line Items]
OTC derivative assets having maturity period of 0 to 12 months	4,394
OTC derivative assets having maturity period of 1 to 5 years
OTC derivative assets having maturity period of greater than 5 years
OTC derivative assets cross-maturity netting
Total OTC derivative assets, net of cross-maturity netting	4,394
OTC derivative liabilities having maturity period of 0 to 12 months
OTC derivative liabilities having maturity period of 1 to 5 years
OTC derivative liabilities having maturity period of greater than 5 years	3,332
OTC derivative liabilities cross-maturity netting
Total OTC derivative liabilities, net of cross-maturity netting	3,332
Successor [Member] | Total return swaps [Member]
Remaining Contract Maturity Of Fair Value Of Over Counter Derivative Assets And Liabilities [Line Items]
OTC derivative assets having maturity period of 0 to 12 months	948
OTC derivative assets having maturity period of 1 to 5 years
OTC derivative assets having maturity period of greater than 5 years
OTC derivative assets cross-maturity netting
Total OTC derivative assets, net of cross-maturity netting	948
OTC derivative liabilities having maturity period of 0 to 12 months	5,002
OTC derivative liabilities having maturity period of 1 to 5 years
OTC derivative liabilities having maturity period of greater than 5 years
OTC derivative liabilities cross-maturity netting
Total OTC derivative liabilities, net of cross-maturity netting	5,002
Successor [Member] | Foreign currency forwards, swaps and options [Member]
Remaining Contract Maturity Of Fair Value Of Over Counter Derivative Assets And Liabilities [Line Items]
OTC derivative assets having maturity period of 0 to 12 months	89,072
OTC derivative assets having maturity period of 1 to 5 years	37,798
OTC derivative assets having maturity period of greater than 5 years	52
OTC derivative assets cross-maturity netting	(11,192)
Total OTC derivative assets, net of cross-maturity netting	115,730
OTC derivative liabilities having maturity period of 0 to 12 months	117,044
OTC derivative liabilities having maturity period of 1 to 5 years	47,258
OTC derivative liabilities having maturity period of greater than 5 years
OTC derivative liabilities cross-maturity netting	(8,608)
Total OTC derivative liabilities, net of cross-maturity netting	155,694
Successor [Member] | Interest rate swaps, options and forwards [Member]
Remaining Contract Maturity Of Fair Value Of Over Counter Derivative Assets And Liabilities [Line Items]
OTC derivative assets having maturity period of 0 to 12 months	96,983
OTC derivative assets having maturity period of 1 to 5 years	89,255
OTC derivative assets having maturity period of greater than 5 years	128,983
OTC derivative assets cross-maturity netting	(51,990)
Total OTC derivative assets, net of cross-maturity netting	263,231
OTC derivative liabilities having maturity period of 0 to 12 months	24,142
OTC derivative liabilities having maturity period of 1 to 5 years	124,352
OTC derivative liabilities having maturity period of greater than 5 years	136,683
OTC derivative liabilities cross-maturity netting	(51,990)
Total OTC derivative liabilities, net of cross-maturity netting	$ 233,187