Quarterly report pursuant to Section 13 or 15(d)

Derivative Financial Instruments (BS Offsetting) (Details 4)

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Derivative Financial Instruments (BS Offsetting) (Details 4) (Deriviative Contract [Member], USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Deriviative Contract [Member]
    
Derivative Asset, Fair Value, Amount Offset Against Collateral [Abstract]    
Cash collateral received $ (1,659) $ (360)
Derivative Assets [Abstract]    
Gross amounts offset in the statement of financial position 102,043 111,458
Gross amounts not offset in the statement of financial position - financial instruments 42,125 35,205
Derivative Assets 173,917 153,880
Derivative Asset, Fair Value, Net [Abstract]    
Gross amounts of recognized assets 319,744 300,903
Net amounts of assets presented in the statement of financial position 217,701 189,445
Derivative Liability, Fair Value, Amount Offset Against Collateral [Abstract]    
Cash collateral given (2,763) 290
Derivative Liabilities [Abstract]    
Gross amounts offset in the statement of financial position (79,412) (76,539)
Gross amounts not offset in the statement of financial position - financial instruments 77,733 86,204
Derivative Liabilities 55,046 33,944
Derivative Liability, Fair Value, Net [Abstract]    
Gross amounts of recognized liabilities 214,954 196,397
Net amounts of assets presented in the statement of financial position $ 135,542 $ 119,858