. . . EXHIBIT 12.1 RATIO OF EARNINGS TO FIXED CHARGES For the Six Months YEAR ENDED DECEMBER 31, Ended June 30, ----------------------------------------------------------------------------------- 2000 2001 2002 2003 2004 2004 2005 ----------------------------------------------------------------------------------- (IN THOUSANDS EXCEPT RATIO CALCULATION) RATIO OF EARNINGS TO FIXED CHARGES 0.90 (0.16) 2.03 3.03 3.46 3.09 2.49 Operating income (loss) $ 8,876 $(16,447) $119,980 $127,085 $141,294 $ 64,567 $ 74,818 Interest expense (1) 32,407 63,358 59,143 41,438 39,611 19,723 29,669 Equity in net loss of affiliated company -- -- -- 2,123 3,905 3,798 763 Gain on sale of assets, net -- 4,224 133 -- -- -- -- Other income, net 20,084 991 1,213 2,721 2,541 1,451 866 ---------------------------------------------------------------------------------- Pre-tax earnings from continuing operations (3,447) (74,590) 62,183 86,245 100,319 42,497 45,252 Income (loss) before extraordinary item and cumulative effect of accounting change (4,251) (50,040) 36,901 53,783 61,602 42,497 45,252 Pre-tax earnings from continuing operations (3,447) (74,590) 62,183 86,245 100,319 42,497 45,252 Add Interest expense (1) 33,163 64,404 60,202 42,493 40,718 20,327 30,334 ---------------------------------------------------------------------------------- EARNINGS $ 29,716 $(10,186) $122,385 $128,738 $141,037 $ 62,824 $ 75,586 ================================================================================== Interest expense (2) $ 28,581 $ 61,371 $ 57,089 $ 39,743 $ 37,909 $ 18,875 $ 26,507 Interest component of rent expense (3) $ 756 $ 1,046 $ 1,059 $ 1,055 $ 1,107 $ 604 $ 665 Amortization of premiums and discounts -- -- -- -- -- Capitalized expenses related to indebtedness 3,826 1,987 2,054 1,695 1,702 848 3162 ---------------------------------------------------------------------------------- FIXED CHARGES $ 33,163 $ 64,404 $ 60,202 $ 42,493 $ 40,718 $ 20,327 $ 30,334 ================================================================================== (1) Interest expense includes non-cash interest, such as the accretion of principal, the amortization of discounts on debt and the amortization of deferred financing costs. (2) Cash interest expense is calculated as interest expense less non-cash interest, such as the accretion of principal, the amortization of discounts on debt and the amortization of deferred financing costs. (3) An average of 19% of rent expense is the portion deemed representative of the interest factor.