Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments and Hedging Activities Schedule of Interest Rate Swaps Associated with Borrowings (Details)

v2.4.0.8
Derivative Instruments and Hedging Activities Schedule of Interest Rate Swaps Associated with Borrowings (Details) (Interest Rate Risk Associated with Borrowings [Member], Swap [Member], USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Derivative [Line Items]    
Derivative, Notional Amount $ 14,625,000 $ 14,425,000
Derivative, Average Fixed Interest Rate 0.75% 0.698%
Derivative, Average Variable Interest Rate 0.236% 0.235%
Derivative, Weighted Average Remaining Maturity 2.471 2.501
Derivative Maturity Within One Year From Balance Sheet Date [Member]
    
Derivative [Line Items]    
Derivative, Notional Amount 3,000,000 3,900,000
Derivative, Average Fixed Interest Rate 0.295% 0.30%
Derivative, Average Variable Interest Rate 0.234% 0.245%
Derivative, Weighted Average Remaining Maturity .731 .764
Derivative Maturity Over One And Within Two Years From Balance Sheet Date [Member]
    
Derivative [Line Items]    
Derivative, Notional Amount 1,000,000 1,000,000
Derivative, Average Fixed Interest Rate 0.383% 0.383%
Derivative, Average Variable Interest Rate 0.237% 0.244%
Derivative, Weighted Average Remaining Maturity .794 1.044
Derivative Maturity Over Two And Within Three Years From Balance Sheet Date [Member]
    
Derivative [Line Items]    
Derivative, Notional Amount 2,950,000 2,950,000
Derivative, Average Fixed Interest Rate 0.626% 0.626%
Derivative, Average Variable Interest Rate 0.238% 0.246%
Derivative, Weighted Average Remaining Maturity 2.167 2.417
Derivative Maturity Over Three And Within Four Years From Balance Sheet Date [Member]
    
Derivative [Line Items]    
Derivative, Notional Amount 6,300,000 5,300,000
Derivative, Average Fixed Interest Rate 0.936% 0.92%
Derivative, Average Variable Interest Rate 0.236% 0.217%
Derivative, Weighted Average Remaining Maturity 3.199 3.49
Derivative Maturity Over Four Years From Balance Sheet Date [Member]
    
Derivative [Line Items]    
Derivative, Notional Amount $ 1,375,000 $ 1,275,000
Derivative, Average Fixed Interest Rate 1.424% 1.406%
Derivative, Average Variable Interest Rate 0.235% 0.242%
Derivative, Weighted Average Remaining Maturity 4.799 5.041