<TABLE> <S> <C>

<PAGE>
<ARTICLE> 9
       
<S>                             <C>                     <C>                     <C>                     <C>
<C>
<PERIOD-TYPE>                   9-MOS                   6-MOS                   3-MOS                   9-MOS
6-MOS
<FISCAL-YEAR-END>                          DEC-31-1998             DEC-31-1998             DEC-31-1998             DEC-31-1997
             DEC-31-1997
<PERIOD-START>                             JAN-01-1998             JAN-01-1998             JAN-01-1998             JAN-01-1997
             JAN-01-1997
<PERIOD-END>                               SEP-30-1998             JUN-30-1998             MAR-31-1998             SEP-30-1997
             JUN-30-1997
<CASH>                                          22,707                  25,332                  21,897                  32,245
                  28,651
<INT-BEARING-DEPOSITS>                           2,020                   1,295                   2,401                   1,486
                   1,194
<FED-FUNDS-SOLD>                                33,496                   5,500                  24,500                  22,800
                  20,900
<TRADING-ASSETS>                                     0                       0                       0                       0
                       0
<INVESTMENTS-HELD-FOR-SALE>                    373,409                 361,036                 321,909                 257,506
                 274,917
<INVESTMENTS-CARRYING>                          66,610                 110,535                 106,291                 152,583
                 127,671
<INVESTMENTS-MARKET>                            70,034                 113,528                 109,628                 155,681
                 129,841
<LOANS>                                        695,760                 672,394                 646,665                 604,310
                 595,970
<ALLOWANCE>                                      9,002                   8,800                   8,535                   7,997
                   7,626
<TOTAL-ASSETS>                               1,236,043               1,240,466               1,160,623               1,105,664
               1,082,643
<DEPOSITS>                                     965,352               1,005,993                 957,883                 901,339
                 880,471
<SHORT-TERM>                                    10,000                  42,000                  20,000                  64,277
                  76,459
<LIABILITIES-OTHER>                             14,203                  11,205                  12,546                   8,668
                   7,194
<LONG-TERM>                                    130,711                  69,362                  63,653                  29,223
                  19,721
<PREFERRED-MANDATORY>                                0                       0                       0                       0
                       0
<PREFERRED>                                          0                       0                       0                       0
                       0
<COMMON>                                           146                     143                  71,173                  39,963
                  40,012
<OTHER-SE>                                      95,494                  91,626                  15,231                  42,057
                  38,649
<TOTAL-LIABILITIES-AND-EQUITY>               1,236,043               1,240,466               1,160,623               1,105,664
               1,082,643
<INTEREST-LOAN>                                 43,399                  28,613                  14,073                  38,968
                  25,572
<INTEREST-INVEST>                               22,928                  15,097                   7,356                  19,095
                  11,970
<INTEREST-OTHER>                                 1,074                     656                     361                     869
                     625
<INTEREST-TOTAL>                                67,401                  44,366                  21,790                  58,932
                  38,167
<INTEREST-DEPOSIT>                              29,249                  19,594                   9,547                  25,702
                  16,573
<INTEREST-EXPENSE>                              35,518                  23,466                  11,519                  30,633
                  19,539
<INTEREST-INCOME-NET>                           31,883                  20,900                  10,271                  28,299
                  18,628
<LOAN-LOSSES>                                      931                     620                     310                   2,002
                   1,481
<SECURITIES-GAINS>                               1,091                   1,059                     373                     795
                     526
<EXPENSE-OTHER>                                 24,840                  13,720                   6,461                  17,956
                  11,803
<INCOME-PRETAX>                                 10,167                   9,455                   4,783                  12,025
                   7,821
<INCOME-PRE-EXTRAORDINARY>                      10,167                   9,455                   4,783                  12,025
                   7,821
<EXTRAORDINARY>                                      0                       0                       0                       0
                       0
<CHANGES>                                            0                       0                       0                       0
                       0
<NET-INCOME>                                     8,549                   8,539                   3,285                   8,287
                   5,341
<EPS-PRIMARY>                                     0.61                    0.61                    0.24                    0.59
                    0.38
<EPS-DILUTED>                                     0.57                    0.56                    0.21                    0.55
                    0.35
<YIELD-ACTUAL>                                       0                       0                       0                       0
                       0
<LOANS-NON>                                      4,941                   5,155                   6,794                   9,065
                   8,588
<LOANS-PAST>                                       613                     407                     250                     332
                     740
<LOANS-TROUBLED>                                   494                     498                     501                     984
                   1,222
<LOANS-PROBLEM>                                  1,020                     452                     100                     480
                     500
<ALLOWANCE-OPEN>                                 8,260                   8,260                   8,260                   6,402
                   6,402
<CHARGE-OFFS>                                      262                     122                      48                     502
                     300
<RECOVERIES>                                        73                      51                      23                      75
                      43
<ALLOWANCE-CLOSE>                                9,002                   8,800                   8,535                   7,977
                   7,626
<ALLOWANCE-DOMESTIC>                             9,002                   8,800                   8,535                   7,977
                   7,626
<ALLOWANCE-FOREIGN>                                  0                       0                       0                       0
                       0
<ALLOWANCE-UNALLOCATED>                              0                       0                       0                       0
                       0
        

</TABLE>