|
Derivative Financial Instruments - Unrealized and Realized Gains (Losses) on Derivative Contracts (Detail) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 6 Months Ended | 9 Months Ended | 3 Months Ended | 6 Months Ended | 9 Months Ended | 3 Months Ended | 6 Months Ended | 9 Months Ended | 3 Months Ended | 6 Months Ended | 9 Months Ended | 3 Months Ended | 6 Months Ended | 9 Months Ended | 3 Months Ended | 6 Months Ended | 9 Months Ended | 3 Months Ended | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Aug. 31, 2014
Successor [Member]
|
Aug. 31, 2013
Successor [Member]
|
Aug. 31, 2013
Successor [Member]
|
Aug. 31, 2014
Successor [Member]
|
Aug. 31, 2014
Successor [Member]
Interest rate contracts [Member]
|
Aug. 31, 2013
Successor [Member]
Interest rate contracts [Member]
|
Aug. 31, 2013
Successor [Member]
Interest rate contracts [Member]
|
Aug. 31, 2014
Successor [Member]
Interest rate contracts [Member]
|
Aug. 31, 2014
Successor [Member]
Foreign exchange contracts [Member]
|
Aug. 31, 2013
Successor [Member]
Foreign exchange contracts [Member]
|
Aug. 31, 2013
Successor [Member]
Foreign exchange contracts [Member]
|
Aug. 31, 2014
Successor [Member]
Foreign exchange contracts [Member]
|
Aug. 31, 2014
Successor [Member]
Equity contracts [Member]
|
Aug. 31, 2013
Successor [Member]
Equity contracts [Member]
|
Aug. 31, 2013
Successor [Member]
Equity contracts [Member]
|
Aug. 31, 2014
Successor [Member]
Equity contracts [Member]
|
Aug. 31, 2014
Successor [Member]
Commodity contracts [Member]
|
Aug. 31, 2013
Successor [Member]
Commodity contracts [Member]
|
Aug. 31, 2013
Successor [Member]
Commodity contracts [Member]
|
Aug. 31, 2014
Successor [Member]
Commodity contracts [Member]
|
Aug. 31, 2014
Successor [Member]
Credit contracts [Member]
|
Aug. 31, 2013
Successor [Member]
Credit contracts [Member]
|
Aug. 31, 2013
Successor [Member]
Credit contracts [Member]
|
Aug. 31, 2014
Successor [Member]
Credit contracts [Member]
|
Feb. 28, 2013
Predecessor [Member]
|
Feb. 28, 2013
Predecessor [Member]
Interest rate contracts [Member]
|
Feb. 28, 2013
Predecessor [Member]
Foreign exchange contracts [Member]
|
Feb. 28, 2013
Predecessor [Member]
Equity contracts [Member]
|
Feb. 28, 2013
Predecessor [Member]
Commodity contracts [Member]
|
Feb. 28, 2013
Predecessor [Member]
Credit contracts [Member]
|
|
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||||||||||||||||||||||
| Unrealized and realized gains (losses) | $ (52,849) | $ 165,933 | $ 238,527 | $ (243,185) | $ (3,803) | $ 130,178 | $ 177,796 | $ (46,376) | $ 6,697 | $ (3,930) | $ (25) | $ 8,294 | $ (49,422) | $ 25,509 | $ 37,588 | $ (220,774) | $ (4,991) | $ 15,080 | $ 36,593 | $ 32,989 | $ (1,330) | $ (904) | $ (13,425) | $ (17,318) | $ 52,864 | $ 45,875 | $ 12,228 | $ (20,938) | $ 19,585 | $ (3,886) |