1 EXHIBIT 11 STATEMENT RE COMPUTATION OF PER SHARE EARNINGS Year Ended December 31, ----------------------------------------------- (Dollars in thousands except per share amounts.) 1997 1996 1995 ------- ------- ------- Basic Earning per Share Average shares outstanding 22,213 20,995 20,874 ======= ======= ======= Income available to common shareholders' $45,350 $42,883 $35,504 ======= ======= ======= Basic Earnings per Share $ 2.04 $ 2.04 $ 1.70 ======= ======= ======= Diluted Earnings per Share Average common shares outstanding 22,213 20,995 20,874 Effect of dilutive stock options 181 134 141 ------- ------- ------- Average diluted shares outstanding 22,394 21,129 21,015 ======= ======= ======= Income available to common shareholders' $45,350 $42,883 $35,504 ======= ======= ======= Diluted Earnings per Share $ 2.03 $ 2.03 $ 1.69 ======= ======= ======= 63