Quarterly report pursuant to Section 13 or 15(d)

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

v3.3.0.814
Derivative Instruments and Hedging Activities Schedule of Interest Rate Swaps Associated with Borrowings (Details)
$ in Thousands
Sep. 30, 2015
USD ($)
Jun. 30, 2015
USD ($)
Dec. 31, 2014
USD ($)
Sep. 30, 2014
USD ($)
Jun. 30, 2014
USD ($)
Dec. 31, 2013
USD ($)
Derivative [Line Items]            
Derivative, Notional Amount $ 28,317,580 $ 27,401,335 $ 48,115,523 $ 57,015,981 $ 43,379,217 $ 37,366,610
Interest Rate Swap [Member]            
Derivative [Line Items]            
Derivative, Notional Amount 14,025,523 $ 16,225,523 18,584,000 $ 27,770,655 $ 23,628,148 $ 19,619,000
Interest Rate Swap [Member] | Interest Rate Risk Associated with Borrowings [Member]            
Derivative [Line Items]            
Derivative, Notional Amount $ 8,011,523   $ 11,490,000      
Derivative, Average Fixed Interest Rate 1.216%   1.089%      
Derivative, Average Variable Interest Rate 0.312%   0.246%      
Derivative, Average Remaining Period Until Maturity 3.72   2.92      
Interest Rate Swap [Member] | Interest Rate Risk Associated with Borrowings [Member] | Derivative Maturity Within One Year From Balance Sheet Date [Member]            
Derivative [Line Items]            
Derivative, Notional Amount $ 1,700,000          
Derivative, Average Fixed Interest Rate 0.698%          
Derivative, Average Variable Interest Rate 0.324%          
Derivative, Average Remaining Period Until Maturity 0.98          
Interest Rate Swap [Member] | Interest Rate Risk Associated with Borrowings [Member] | Derivative Maturity Over One And Within Two Years From Balance Sheet Date [Member]            
Derivative [Line Items]            
Derivative, Notional Amount $ 2,375,000   $ 4,100,000      
Derivative, Average Fixed Interest Rate 0.864%   0.667%      
Derivative, Average Variable Interest Rate 0.312%   0.249%      
Derivative, Average Remaining Period Until Maturity 1.84   1.65      
Interest Rate Swap [Member] | Interest Rate Risk Associated with Borrowings [Member] | Derivative Maturity Over Two And Within Three Years From Balance Sheet Date [Member]            
Derivative [Line Items]            
Derivative, Notional Amount $ 800,000   $ 5,285,000      
Derivative, Average Fixed Interest Rate 0.944%   1.063%      
Derivative, Average Variable Interest Rate 0.318%   0.248%      
Derivative, Average Remaining Period Until Maturity 2.39   2.55      
Interest Rate Swap [Member] | Interest Rate Risk Associated with Borrowings [Member] | Derivative Maturity Over Three And Within Four Years From Balance Sheet Date [Member]            
Derivative [Line Items]            
Derivative, Notional Amount $ 350,000   $ 625,000      
Derivative, Average Fixed Interest Rate 1.73%   0.945%      
Derivative, Average Variable Interest Rate 0.303%   0.233%      
Derivative, Average Remaining Period Until Maturity 3.69   3.08      
Interest Rate Swap [Member] | Interest Rate Risk Associated with Borrowings [Member] | Derivative Maturity Over Four Years From Balance Sheet Date [Member]            
Derivative [Line Items]            
Derivative, Notional Amount $ 2,786,523   $ 1,480,000      
Derivative, Average Fixed Interest Rate 1.845%   2.408%      
Derivative, Average Variable Interest Rate 0.305%   0.235%      
Derivative, Average Remaining Period Until Maturity 7.37   7.70