Quarterly report pursuant to Section 13 or 15(d)

Derivative Financial Instruments (Asset and liability management) (Details)

v3.2.0.727
Derivative Financial Instruments (Asset and liability management) (Details) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Notional Amount Of Derivatives [Abstract]    
Derivative, Notional Amount   $ 600,000
Cash flow hedging [Member]    
Notional Amount Of Derivatives [Abstract]    
Derivative, Notional Amount $ 9,248,500  
Fair Value Hedging [Member]    
Notional Amount Of Derivatives [Abstract]    
Derivative, Notional Amount 4,579,100  
Loan [Member] | Cash flow hedging [Member]    
Notional Amount Of Derivatives [Abstract]    
Derivative, Notional Amount 9,248,500  
Deposits [Member] | Fair Value Hedging [Member]    
Notional Amount Of Derivatives [Abstract]    
Derivative, Notional Amount 69,100  
Subordinated notes | Fair Value Hedging [Member]    
Notional Amount Of Derivatives [Abstract]    
Derivative, Notional Amount 475,000  
Other long-term debt | Fair Value Hedging [Member]    
Notional Amount Of Derivatives [Abstract]    
Derivative, Notional Amount $ 4,035,000