Ratio of Income To Combined Fixed Charges And Preferred Stock Dividends
The following table sets forth the calculation of our ratio of earnings to combined fixed charges and preferred stock
dividends for the periods shown:

For the 9 Months
    Ended For the Year Ended
September 30,
2015
    December 31,
2014
    December 31,
2013
    December 31,
2012
    December 31,
2011
    December 31,
2010
(dollars in thousands)
Net income before taxes 134,969 589,207 362,688 327,768 137,935 249,161
Add:   fixed charges (interest expense) (1) 227,748 200,430 123,856 146,781 150,787 152,236
          preferred stock dividend  
Income as adjusted 362,717 789,637 486,544 474,549 288,722 401,397
Fixed charges (interest expense) + preferred stock dividend 227,748 200,430 123,856 146,781 150,787 152,236
Ratio of income (losses) to combined fixed charges
and preferred stock dividends 1.59x 3.94x 3.93x 3.23x 1.91x 2.64x
 
Deficiency $ - $ - $ - $ - $ - $ -

(1) Includes effect of realized losses on interest rate swaps.