EXHIBIT 12 Exhibit Computation of Ratio of Earnings to Fixed Charges ------------------------------------------------- (Dollars in thousands) Three Months Ended Six Months Ended June 30, June 30, Years Ended December 31, ------------------ ------------------ ------------------------------------------------ 1995 1994 1995 1994 1994 1993 1992 1991 1990 -------- ------- -------- -------- -------- -------- -------- -------- -------- Income before income taxes................ $ 55,498 $52,973 $107,963 $103,510 $218,913 $189,960 $185,704 $148,746 $131,582 -------- ------- -------- -------- -------- -------- -------- -------- -------- Fixed charges: Interest on debt.... 50,918 36,806 99,467 70,130 151,239 137,372 146,594 167,236 164,699 1/3 rental expense.. 373 350 765 697 1,463 1,575 1,491 1,389 1,321 -------- ------- -------- -------- -------- -------- -------- -------- -------- Total fixed charges... 51,291 37,156 100,232 70,827 152,702 138,947 148,085 168,625 166,020 -------- ------- -------- -------- -------- -------- -------- -------- -------- Total................. $106,789 $90,129 $208,195 $174,337 $371,615 $328,907 $333,789 $317,371 $297,602 ======== ======= ======== ======== ======== ======== ======== ======== ======== Ratio of earnings to fixed charges(1)..... 2.08x 2.43x 2.08x 2.46x 2.43x 2.37x 2.25x 1.88x 1.79x ======== ======= ======== ======== ======== ======== ======== ======== ======== (1) The ratio of earnings to fixed charges is computed by dividing income before income taxes and fixed charges by fixed charges. Fixed charges consist of interest on debt and one-third rental expense as representative of the interest portion of rentals.