EXHIBIT 11 STATEMENT RE: COMPUTATION OF PER-SHARE EARNINGS Year Ended December 31, 1999 1998 1997 ---- ---- ---- Net earnings available to common before gains or losses on asset dispositions ........................ $ 40,047 $ 41,777 $ 41,305 ========= ======== ======== Net earnings .......................................... $ 10,040 $ 68,015 $ 41,305 ========= ======== ======== Average shares outstanding ............................ 19,877 20,034 19,085 Basic per-share amounts: Net earnings .......................................... $ 0.51 $ 3.39 $ 2.16 ========= ======== ======== Net earnings before gains or losses on asset dispositions ........................................ $ 2.01 $ 2.09 $ 2.16 ========== ======== ======== Average shares outstanding ............................ 19,877 20,034 19,085 Stock option incremental shares ....................... 0 7 52 ------- -------- -------- Average shares outstanding, diluted ................ 19,877 20,041 19,137 ======= ======== ======== Diluted per-share amounts: Net earnings .......................................... $ 0.51 $ 3.39 $ 2.16 ========= ======== ======== Net earnings before asset dispositions ................ $ 2.01 $ 2.08 $ 2.16 ========= ======== ======== Diluted assuming conversion of debt: Net earnings before gains or losses on asset dispositions ........................................ $ 40,047 $ 41,777 $ 41,305 Add interest expense associated with Convertible debentures ......................................... 4,381 4,714 6,279 --------- -------- -------- Total ......................................... $ 44,428 $ 46,491 $ 47,584 ========= ======== ======== Average shares outstanding ............................ 19,877 20,034 19,085 Assumed conversion of debentures ...................... 1,794 1,899 2,583 Stock option incremental shares ....................... 0 7 52 -------- -------- -------- Total ......................................... 21,671 21,940 21,720 ======== ======== ======== Per-share amount (antidilutive) ....................... $ 2.05 $ 2.12 $ 2.19 ======== ======== ========