<TABLE> <S> <C>

<PAGE>
<ARTICLE> 9
<MULTIPLIER> 1,000
       
<S>                             <C>                     <C>
<PERIOD-TYPE>                   12-MOS                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1998             DEC-31-1997
<PERIOD-START>                             JAN-01-1998             JAN-01-1997
<PERIOD-END>                               DEC-31-1998             DEC-31-1997
<CASH>                                          36,630                  36,066
<INT-BEARING-DEPOSITS>                               0                       0
<FED-FUNDS-SOLD>                                     0                       0
<TRADING-ASSETS>                                     0                       0
<INVESTMENTS-HELD-FOR-SALE>                    398,643                 271,120
<INVESTMENTS-CARRYING>                           8,522                  13,868
<INVESTMENTS-MARKET>                           407,411                 285,262
<LOANS>                                      1,379,691               1,213,256
<ALLOWANCE>                                     22,168                  19,207
<TOTAL-ASSETS>                               1,859,079               1,560,571
<DEPOSITS>                                   1,472,746               1,239,508
<SHORT-TERM>                                   143,759                 178,644
<LIABILITIES-OTHER>                              7,583                  21,553
<LONG-TERM>                                    100,000                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                           112                     112
<OTHER-SE>                                     134,878                 120,755
<TOTAL-LIABILITIES-AND-EQUITY>               1,859,079               1,560,571
<INTEREST-LOAN>                                121,256                 103,196
<INTEREST-INVEST>                               24,749                  19,184
<INTEREST-OTHER>                                     0                       0
<INTEREST-TOTAL>                               146,005                 122,380
<INTEREST-DEPOSIT>                              63,988                  51,936
<INTEREST-EXPENSE>                              11,279                  10,080
<INTEREST-INCOME-NET>                           70,738                  60,364
<LOAN-LOSSES>                                   12,275                  10,314
<SECURITIES-GAINS>                               (821)                     380
<EXPENSE-OTHER>                                 31,989                  28,631
<INCOME-PRETAX>                                 32,594                  27,720
<INCOME-PRE-EXTRAORDINARY>                      32,594                  27,720
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                    19,870                  16,986
<EPS-PRIMARY>                                     2.31                    2.00
<EPS-DILUTED>                                     2.24                    1.93
<YIELD-ACTUAL>                                    8.86                    8.90
<LOANS-NON>                                     13,400                  12,672
<LOANS-PAST>                                       513                     304
<LOANS-TROUBLED>                                     0                       0
<LOANS-PROBLEM>                                      0                       0
<ALLOWANCE-OPEN>                                19,207                  17,054
<CHARGE-OFFS>                                   10,523                   9,878
<RECOVERIES>                                     1,227                   1,717
<ALLOWANCE-CLOSE>                               22,168                  19,207
<ALLOWANCE-DOMESTIC>                            22,168                  19,207
<ALLOWANCE-FOREIGN>                                  0                       0
<ALLOWANCE-UNALLOCATED>                              0                       0
        

</TABLE>