Quarterly report pursuant to Section 13 or 15(d)

Derivative Financial Instruments (Cash flow hedges) (Details 2)

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Derivative Financial Instruments (Cash flow hedges) (Details 2) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Cash flow hedging [Member]
    
Gains and (losses) recognized in other comprehensive income (loss) (OCI) for derivatives designated as effective cash flow hedges    
Amount of gain or (loss) recognized in OCI on derivatives (effective portion) $ (10,339) $ (25,792)
Amount of gain or (loss) reclassified from accumulated OCI into earnings (effective portion) 4,026 (24,793)
Hedged Other long term debt [Member] | Interest expense subordinated notes and other long term debt [Member]
    
Increase or (decrease) to interest expense for derivatives designated as fair value hedges    
Increase or (decrease) to interest expense for derivatives designated as fair value hedges 397 347
Hedged Subordinated notes [Member] | Interest expense subordinated notes and other long term debt [Member]
    
Increase or (decrease) to interest expense for derivatives designated as fair value hedges    
Increase or (decrease) to interest expense for derivatives designated as fair value hedges 8,121 8,758
Hedged Deposits [Member] | Interest expense deposits [Member]
    
Increase or (decrease) to interest expense for derivatives designated as fair value hedges    
Increase or (decrease) to interest expense for derivatives designated as fair value hedges 1,748 (594)
FHLB Advances [Member] | Interest expense other borrowings [Member] | Cash flow hedging [Member]
    
Gains and (losses) recognized in other comprehensive income (loss) (OCI) for derivatives designated as effective cash flow hedges    
Amount of gain or (loss) recognized in OCI on derivatives (effective portion) 0 0
Amount of gain or (loss) reclassified from accumulated OCI into earnings (effective portion) 0 0
Loan [Member] | Interest and fee income loans and leases [Member] | Cash flow hedging [Member]
    
Gains and (losses) recognized in other comprehensive income (loss) (OCI) for derivatives designated as effective cash flow hedges    
Amount of gain or (loss) recognized in OCI on derivatives (effective portion) (10,339) (25,827)
Amount of gain or (loss) reclassified from accumulated OCI into earnings (effective portion) 3,916 (24,786)
Investment securities [Member] | Interest and fee income investment securities [Member] | Cash flow hedging [Member]
    
Gains and (losses) recognized in other comprehensive income (loss) (OCI) for derivatives designated as effective cash flow hedges    
Amount of gain or (loss) recognized in OCI on derivatives (effective portion) 0 35
Amount of gain or (loss) reclassified from accumulated OCI into earnings (effective portion) 110 0
Deposits [Member] | Interest expense deposits [Member]
    
Increase or (decrease) to interest expense for derivatives designated as fair value hedges    
Increase or (decrease) to interest expense for derivatives designated as fair value hedges (1,754) 533
Deposits [Member] | Interest expense deposits [Member] | Cash flow hedging [Member]
    
Gains and (losses) recognized in other comprehensive income (loss) (OCI) for derivatives designated as effective cash flow hedges    
Amount of gain or (loss) recognized in OCI on derivatives (effective portion) 0 0
Amount of gain or (loss) reclassified from accumulated OCI into earnings (effective portion) 0 0
Subordinated notes | Interest expense subordinated notes and other long term debt [Member]
    
Increase or (decrease) to interest expense for derivatives designated as fair value hedges    
Increase or (decrease) to interest expense for derivatives designated as fair value hedges (8,121) (8,758)
Subordinated notes | Interest expense subordinated notes and other long term debt [Member] | Cash flow hedging [Member]
    
Gains and (losses) recognized in other comprehensive income (loss) (OCI) for derivatives designated as effective cash flow hedges    
Amount of gain or (loss) recognized in OCI on derivatives (effective portion) 0 0
Amount of gain or (loss) reclassified from accumulated OCI into earnings (effective portion) 0 (7)
Other long-term debt | Interest expense subordinated notes and other long term debt [Member]
    
Increase or (decrease) to interest expense for derivatives designated as fair value hedges    
Increase or (decrease) to interest expense for derivatives designated as fair value hedges (397) (347)
Other long-term debt | Interest expense subordinated notes and other long term debt [Member] | Cash flow hedging [Member]
    
Gains and (losses) recognized in other comprehensive income (loss) (OCI) for derivatives designated as effective cash flow hedges    
Amount of gain or (loss) recognized in OCI on derivatives (effective portion) 0 0
Amount of gain or (loss) reclassified from accumulated OCI into earnings (effective portion) $ 0 $ 0