EXHIBIT 11. COMPUTATION OF PER SHARE EARNINGS The computation of net income per share for the three and six months ended June 30, 1996 and 1995 is as follows: (000's omitted except per share data) THREE MONTHS ENDED SIX MONTHS ENDED JUNE 30 JUNE 30 (UNAUDITED) (UNAUDITED) 1996 1995 1996 1995 ---------------------- ----------------------- PRIMARY Net income $ 14,893 $ 13,894 $ 36,896 $ 30,928 Add: Adjustments to net income net of tax, related to convertible debentures (398) 122 (725) 00 --------- --------- --------- ---------- Adjusted net income $ 14,495 $ 14,016 $ 36,171 $ 30,928 ========= ========= ========= ========== Average common shares outstanding 31,515 29,539 31,085 29,040 Dilutive common equivalent shares issuable upon the exercise of options currently outstanding to purchase common shares 1,383 767 1,243 816 Conversion of Debentures 1,472 1,558 1,472 00 --------- --------- --------- ---------- 34,370 31,864 33,800 29,856 ========= ========= ========= ========== Net income per share $ 0.42 $ 0.44 $ 1.07 $ 1.04 ========= ========= ========= ========== FULLY DILUTED Net income $ 14,893 $ 13,894 $ 36,896 $ 30,928 Add: Adjustments to net income net of tax, related to convertible debentures 1,433 2,216 2,831 7,214 --------- --------- --------- --------- Adjusted net income $ 16,326 $ 16,110 $ 39,727 $ 38,142 ========= ========= ========= ========= Average common shares outstanding 31,515 29,539 31,085 29,040 Dilutive common equivalent shares issuable upon the exercise of options currently outstanding to purchase common shares 1,387 767 1,336 816 Conversion of Debentures 6,684 7,203 6,684 7,203 --------- --------- --------- --------- 39,586 37,509 39,105 37,059 ========= ========= ========= ========= Net income per share $ 0.41 $ 0.43 $ 1.02 $ 1.03 ========= ========= ========= =========