Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments and Hedging Activities Schedule of Interest Rate Swaptions (Details)

v2.4.0.8
Derivative Instruments and Hedging Activities Schedule of Interest Rate Swaptions (Details) (USD $)
In Thousands, unless otherwise specified
9 Months Ended 12 Months Ended 12 Months Ended 9 Months Ended 12 Months Ended 9 Months Ended 12 Months Ended 12 Months Ended 9 Months Ended 12 Months Ended 9 Months Ended 12 Months Ended 9 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended
Sep. 30, 2014
Jun. 30, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Dec. 31, 2012
Sep. 30, 2014
Interest Rate Swaption [Member]
Jun. 30, 2014
Interest Rate Swaption [Member]
Dec. 31, 2013
Interest Rate Swaption [Member]
Sep. 30, 2013
Interest Rate Swaption [Member]
Jun. 30, 2013
Interest Rate Swaption [Member]
Dec. 31, 2012
Interest Rate Swaption [Member]
Sep. 30, 2014
Variable Income Interest Rate [Member]
Long [Member]
Interest Rate Swaption [Member]
Dec. 31, 2013
Variable Income Interest Rate [Member]
Long [Member]
Interest Rate Swaption [Member]
Sep. 30, 2014
Variable Income Interest Rate [Member]
Long [Member]
Underlying Swap [Member]
Dec. 31, 2013
Variable Income Interest Rate [Member]
Long [Member]
Underlying Swap [Member]
Dec. 31, 2013
Variable Income Interest Rate [Member]
Long [Member]
Less Than Six Months Remaining Maturity [Member]
Interest Rate Swaption [Member]
Dec. 31, 2013
Variable Income Interest Rate [Member]
Long [Member]
Less Than Six Months Remaining Maturity [Member]
Underlying Swap [Member]
Sep. 30, 2014
Variable Income Interest Rate [Member]
Long [Member]
Six Months or Longer Remaining Maturity [Member]
Interest Rate Swaption [Member]
Dec. 31, 2013
Variable Income Interest Rate [Member]
Long [Member]
Six Months or Longer Remaining Maturity [Member]
Interest Rate Swaption [Member]
Sep. 30, 2014
Variable Income Interest Rate [Member]
Long [Member]
Six Months or Longer Remaining Maturity [Member]
Underlying Swap [Member]
Dec. 31, 2013
Variable Income Interest Rate [Member]
Long [Member]
Six Months or Longer Remaining Maturity [Member]
Underlying Swap [Member]
Sep. 30, 2014
Variable Income Interest Rate [Member]
Short [Member]
Interest Rate Swaption [Member]
Dec. 31, 2013
Variable Income Interest Rate [Member]
Short [Member]
Interest Rate Swaption [Member]
Sep. 30, 2014
Variable Income Interest Rate [Member]
Short [Member]
Underlying Swap [Member]
Dec. 31, 2013
Variable Income Interest Rate [Member]
Short [Member]
Underlying Swap [Member]
Dec. 31, 2013
Variable Income Interest Rate [Member]
Short [Member]
Less Than Six Months Remaining Maturity [Member]
Interest Rate Swaption [Member]
Dec. 31, 2013
Variable Income Interest Rate [Member]
Short [Member]
Less Than Six Months Remaining Maturity [Member]
Underlying Swap [Member]
Sep. 30, 2014
Variable Income Interest Rate [Member]
Short [Member]
Six Months or Longer Remaining Maturity [Member]
Interest Rate Swaption [Member]
Dec. 31, 2013
Variable Income Interest Rate [Member]
Short [Member]
Six Months or Longer Remaining Maturity [Member]
Interest Rate Swaption [Member]
Sep. 30, 2014
Variable Income Interest Rate [Member]
Short [Member]
Six Months or Longer Remaining Maturity [Member]
Underlying Swap [Member]
Dec. 31, 2013
Variable Income Interest Rate [Member]
Short [Member]
Six Months or Longer Remaining Maturity [Member]
Underlying Swap [Member]
Sep. 30, 2014
Fixed Income Interest Rate [Member]
Long [Member]
Interest Rate Swaption [Member]
Dec. 31, 2013
Fixed Income Interest Rate [Member]
Long [Member]
Interest Rate Swaption [Member]
Sep. 30, 2014
Fixed Income Interest Rate [Member]
Long [Member]
Underlying Swap [Member]
Dec. 31, 2013
Fixed Income Interest Rate [Member]
Long [Member]
Underlying Swap [Member]
Sep. 30, 2014
Fixed Income Interest Rate [Member]
Long [Member]
Less Than Six Months Remaining Maturity [Member]
Interest Rate Swaption [Member]
Dec. 31, 2013
Fixed Income Interest Rate [Member]
Long [Member]
Less Than Six Months Remaining Maturity [Member]
Interest Rate Swaption [Member]
Sep. 30, 2014
Fixed Income Interest Rate [Member]
Long [Member]
Less Than Six Months Remaining Maturity [Member]
Underlying Swap [Member]
Dec. 31, 2013
Fixed Income Interest Rate [Member]
Long [Member]
Less Than Six Months Remaining Maturity [Member]
Underlying Swap [Member]
Dec. 31, 2013
Fixed Income Interest Rate [Member]
Short [Member]
Interest Rate Swaption [Member]
Dec. 31, 2013
Fixed Income Interest Rate [Member]
Short [Member]
Underlying Swap [Member]
Dec. 31, 2013
Fixed Income Interest Rate [Member]
Short [Member]
Less Than Six Months Remaining Maturity [Member]
Interest Rate Swaption [Member]
Dec. 31, 2013
Fixed Income Interest Rate [Member]
Short [Member]
Less Than Six Months Remaining Maturity [Member]
Underlying Swap [Member]
Derivative [Line Items]                                                                                        
Derivative, Cost                         $ 190,208 $ 233,935     $ 10,431   $ 190,208 $ 223,504     $ (81,248) $ (84,703)     $ (3,455)   $ (81,248) $ (81,248)     $ 5,181 $ 3,991     $ 5,181 $ 3,991     $ (3,455)   $ (3,455)  
Derivative Asset, Fair Value, Net                         130,263 363,566     10,458   130,263 353,108     (36,651) (94,040)     (7,679)   (36,651) (86,361)     776 681     776 681     (462)   (462)  
Derivative, Average Remaining Period Until Maturity                         45.89 38.16 8.8 9.1 2.78 10.0 45.89 39.14 8.8 9.0 33.02 33.68 10.0 8.1 1.93 5.0 33.02 42.02 10.0 10.0 2.17 1.93 5.4 10.0 2.17 1.93 5.4 10.0 1.93 5.0 1.93 5.0
Derivative, Notional Amount $ 57,015,981 $ 43,379,217 $ 37,366,610 $ 36,472,401 $ 44,262,605 $ 22,377,656 $ 7,660,000 $ 11,450,000 $ 5,130,000 $ 4,430,000 $ 6,250,000 $ 4,950,000     $ 5,210,000 $ 6,675,000   $ 675,000     $ 5,210,000 $ 6,000,000     $ (800,000) $ (1,310,000)   $ (510,000)     $ (800,000) $ (800,000)     $ 3,250,000 $ 275,000     $ 3,250,000 $ 275,000   $ (510,000)   $ (510,000)
Derivative, Description of Variable Reference Rate                             3M Libor 3M Libor   3M Libor     3M Libor 3M Libor     3M Libor 3M Libor   3M Libor     3M Libor 3M Libor     3M Libor 3M Libor     3M Libor 3M Libor   3M Libor   3M Libor
Derivative, Average Fixed Interest Rate                             4.268% 4.178%   3.326%     4.268% 4.274%     3.438% 2.722%   1.60%     3.438% 3.438%     1.334% 2.89%     1.334% 2.89%   1.60%   1.60%