EXHIBIT 12 Computation of Ratio of Earnings to Combined Fixed Charges and Preferred Stock Dividends (Dollars in thousands) Three Months ended June 30, Six Months ended June 30, -------------------------------- --------------------------------- 2001 2000 2001 2000 ---------------- -------------- -------------- --------------- Net income before extraordinary items $32,617 $12,691 $ 38,536 $ 31,499 Add: Portion of rents representative of the interest factor 197 218 396 462 Minority interests 1,760 854 2,520 1,699 Loss on equity investment in joint venture (199) - (418) - Interest on indebtedness 35,834 39,752 73,055 78,826 --------------- -------------- -------------- -------------- Earnings $70,209 $53,515 $114,089 $112,486 =============== ============== ============== ============== Fixed charges and preferred stock dividend: Interest on indebtedness 35,834 39,752 73,055 78,826 Capitalized interest 911 990 1,679 1,954 Portion of rents representative of the interest factor 197 218 396 462 --------------- -------------- -------------- -------------- Fixed charges 36,942 40,960 75,130 81,242 --------------- -------------- -------------- -------------- Add: Preferred stock dividend 8,590 9,221 17,653 18,629 --------------- -------------- -------------- -------------- Combined fixed charges and preferred stock dividend $45,532 $50,181 $ 92,783 $ 99,871 =============== ============== ============== ============== Ratio of earnings to fixed charges 1.90 x 1.31 x 1.52 x 1.38 x Ratio of earnings to combined fixed charges and preferred stock dividend 1.54 1.07 1.23 1.13