v2.4.0.8
Summary of Impact of Derivative Financial Instruments to Condensed Consolidated Statements of Operations (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Derivative Financial Instruments [Line Items]        
Realized Gains (Losses) $ 7,572 $ 12,298 $ 4,470 $ 7,407
Net Change in Unrealized Gain (Loss) (6,424) (13,854) (27,843) (11,011)
Freestanding Derivatives | Interest Rate Contracts
       
Derivative Financial Instruments [Line Items]        
Realized Gains (Losses) 2,482 359 1,079 (596)
Net Change in Unrealized Gain (Loss) (111) (2,512) (4,384) (12,005)
Freestanding Derivatives | Foreign Currency Contracts
       
Derivative Financial Instruments [Line Items]        
Realized Gains (Losses) 4,327 11,847 1,346 8,084
Net Change in Unrealized Gain (Loss) (5,253) (11,553) (27,197) 1,083
Freestanding Derivatives | Credit Default Swaps
       
Derivative Financial Instruments [Line Items]        
Realized Gains (Losses) 763 92 2,045 (81)
Net Change in Unrealized Gain (Loss) $ (1,060) $ 211 $ 3,738 $ (89)