<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 9
       
<S>                             <C>                     <C>
<MULTIPLIER>     1,000
<PERIOD-TYPE>                                3-MOS                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-31-1997
<PERIOD-START>                             OCT-01-1997             JAN-01-1997
<PERIOD-END>                               DEC-31-1997             DEC-31-1997
<CASH>                                          16,911                       0
<INT-BEARING-DEPOSITS>                          10,344                       0
<FED-FUNDS-SOLD>                                     0                       0
<TRADING-ASSETS>                                     0                       0
<INVESTMENTS-HELD-FOR-SALE>                    204,846                       0
<INVESTMENTS-CARRYING>                         172,623                       0
<INVESTMENTS-MARKET>                           174,000                       0
<LOANS>                                        711,702                       0
<ALLOWANCE>                                      8,641                       0
<TOTAL-ASSETS>                               1,155,048                       0
<DEPOSITS>                                     729,096                       0
<SHORT-TERM>                                   237,523                       0
<LIABILITIES-OTHER>                              8,357                       0
<LONG-TERM>                                     67,019                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                            67                       0
<OTHER-SE>                                     112,986                       0
<TOTAL-LIABILITIES-AND-EQUITY>               1,155,048                       0
<INTEREST-LOAN>                                 14,600                  56,479
<INTEREST-INVEST>                                6,552                  24,794
<INTEREST-OTHER>                                    76                     238
<INTEREST-TOTAL>                                21,228                  81,511
<INTEREST-DEPOSIT>                               7,686                  28,533
<INTEREST-EXPENSE>                              12,098                  46,012
<INTEREST-INCOME-NET>                            9,130                  35,499
<LOAN-LOSSES>                                      300                   1,000
<SECURITIES-GAINS>                                 153                     250
<EXPENSE-OTHER>                                  4,880                  17,926
<INCOME-PRETAX>                                  4,790                  18,871
<INCOME-PRE-EXTRAORDINARY>                       4,790                  18,871
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                     3,028                  11,856
<EPS-PRIMARY>                                      .47                    1.86
<EPS-DILUTED>                                      .45                    1.78
<YIELD-ACTUAL>                                    3.31                    3.35
<LOANS-NON>                                      4,336                   4,336
<LOANS-PAST>                                         0                       0
<LOANS-TROUBLED>                                   162                     162
<LOANS-PROBLEM>                                      0                       0
<ALLOWANCE-OPEN>                                 8,381                   7,759
<CHARGE-OFFS>                                       52                     208
<RECOVERIES>                                        12                      90
<ALLOWANCE-CLOSE>                                8,641                   8,641
<ALLOWANCE-DOMESTIC>                             8,641                   8,641
<ALLOWANCE-FOREIGN>                                  0                       0
<ALLOWANCE-UNALLOCATED>                              0                       0
        

</TABLE>