Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments and Hedging Activities Credit Risk - Counterparty Exposure (Details)

v2.4.0.8
Derivative Instruments and Hedging Activities Credit Risk - Counterparty Exposure (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Credit Derivatives [Line Items]    
Derivative Asset, Fair Value, Gross Asset $ 331,601 $ 549,859
Derivative Liability, Fair Value, Gross Liability 17,097 22,081
Collateral Securities Repledged, Delivered, or Used (93,772)  
Collateral Already Posted, Aggregate Fair Value $ 224,988