XML 30 R89.htm IDEA: XBRL DOCUMENT v2.4.0.6
Derivative Instruments - Summary of Notional for VIE Derivatives Outstanding (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Schedule Of Notional For Variable Interest Entity Derivatives Outstanding [Line Items]    
Derivative products, Notional Amount $ 213,585 $ 190,653
Interest rate swaps [Member]
    
Schedule Of Notional For Variable Interest Entity Derivatives Outstanding [Line Items]    
Derivative products, Notional Amount 1,782,999 1,702,113
Interest rate swaps-pay-fixed/receive variable [Member]
    
Schedule Of Notional For Variable Interest Entity Derivatives Outstanding [Line Items]    
Derivative products, Notional Amount 4,707,454 4,535,626
Currency swaps [Member]
    
Schedule Of Notional For Variable Interest Entity Derivatives Outstanding [Line Items]    
Derivative products, Notional Amount 755,438 721,168
Credit derivatives [Member]
    
Schedule Of Notional For Variable Interest Entity Derivatives Outstanding [Line Items]    
Derivative products, Notional Amount $ 20,885 $ 20,934