Annual report pursuant to Section 13 and 15(d)

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

v3.3.1.900
Derivative Instruments and Hedging Activities Credit Risk - Counterparty Exposure (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Derivatives, Fair Value [Line Items]    
Derivative assets $ 271,509 $ 380,791
Derivative liabilities 7,285 $ 90,233
Collateral Securities Repledged, Delivered, or Used (6,250)  
Collateral Already Posted, Aggregate Fair Value $ 136,541