EXHIBIT 11 COMPUTATION OF EARNINGS PER SHARE EXHIBIT 11 FIRST FINANCIAL CORPORATION COMPUTATION OF EARNINGS PER SHARE For The For The Three Months Ended Year Ended December 31, December 31, ------------------ --------------- 1996 1995 1996 1995 ------ ------ ------ ----- (In thousands, except per share data) PRIMARY EARNINGS PER SHARE Income before extraordinary item $19,240 $19,059 $50,458 $63,984 Extraordinary item -- -- (686) -- ------- ------- ------- ------- Net income $19,240 $19,059 $49,772 $63,984 ======= ======= ======= ======= Shares: Weighted average common shares outstanding 37,158 37,047 37,295 36,789 Shares from assumed exercise of options (as determined by the treasury stock method) 843 944 798 943 ------- ------- ------- ------- Common and common equivalent shares 38,001 37,991 38,093 37,732 ======= ======= ======= ======= Primary Earnings Per Common Share: Income before extraordinary item $ .51 $ .50 $ 1.33 $ 1.70 Extraordinary item -- -- (0.02) -- ------- ------- ------- ------- Net income $ .51 $ .50 $ 1.31 $ 1.70 ======= ======= ======= ======= FULLY DILUTED EARNINGS PER SHARE Income before extraordinary item $19,240 $19,059 $50,458 $63,984 Extraordinary item -- -- (686) -- ------- ------- ------- ------- Net income $19,240 $19,059 $49,772 $63,984 ======= ======= ======= ======= Shares: Weighted average common shares outstanding 37,158 37,047 37,295 36,789 Shares from assumed exercise of options (as determined by the treasury stock method) 886 973 925 1,128 ------- ------- ------- ------- Common and common equivalent shares 38,044 38,020 38,220 37,917 ======= ======= ======= ======= Fully Diluted Earnings Per Common Share: Income before extraordinary item $ .51 $ .50 $ 1.32 $ 1.69 Extraordinary item -- -- (0.02) -- ------- ------- ------- ------- Net income $ .51 $ .50 $ 1.30 $ 1.69 ======= ======= ======= =======