<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 9
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
COMPANY'S BALANCE SHEET AS OF JUNE 30, 1998 AND STATEMENT OF EARNINGS FOR THE
SIX MONTHS ENDED JUNE 30, 1998 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE
TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               JUN-30-1998
<CASH>                                          49,127
<INT-BEARING-DEPOSITS>                               0
<FED-FUNDS-SOLD>                                     0
<TRADING-ASSETS>                                16,728
<INVESTMENTS-HELD-FOR-SALE>                    218,789
<INVESTMENTS-CARRYING>                          22,957
<INVESTMENTS-MARKET>                                 0
<LOANS>                                      1,319,999
<ALLOWANCE>                                          0
<TOTAL-ASSETS>                               1,948,868
<DEPOSITS>                                     422,740
<SHORT-TERM>                                 1,170,229
<LIABILITIES-OTHER>                             33,924
<LONG-TERM>                                    184,245
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                       117,708
<OTHER-SE>                                      20,022
<TOTAL-LIABILITIES-AND-EQUITY>               1,948,868
<INTEREST-LOAN>                                 59,046
<INTEREST-INVEST>                               15,293
<INTEREST-OTHER>                                 1,802
<INTEREST-TOTAL>                                76,141
<INTEREST-DEPOSIT>                              11,122
<INTEREST-EXPENSE>                              64,253
<INTEREST-INCOME-NET>                           11,888
<LOAN-LOSSES>                                  (3,000)
<SECURITIES-GAINS>                               9,831 
<EXPENSE-OTHER>                                 48,999
<INCOME-PRETAX>                                 12,997
<INCOME-PRE-EXTRAORDINARY>                      12,997
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     7,161
<EPS-PRIMARY>                                     0.65
<EPS-DILUTED>                                     0.61
<YIELD-ACTUAL>                                       0
<LOANS-NON>                                          0
<LOANS-PAST>                                         0
<LOANS-TROUBLED>                                     0
<LOANS-PROBLEM>                                      0
<ALLOWANCE-OPEN>                                     0
<CHARGE-OFFS>                                        0
<RECOVERIES>                                         0
<ALLOWANCE-CLOSE>                                    0
<ALLOWANCE-DOMESTIC>                                 0
<ALLOWANCE-FOREIGN>                                  0
<ALLOWANCE-UNALLOCATED>                              0
        

</TABLE>