<TABLE> <S> <C>

<PAGE>
<ARTICLE> 9
<MULTIPLIER> 1,000
       
<S>                             <C>                      <C>                   
<PERIOD-TYPE>                   3-MOS                    3-MOS                 
<FISCAL-YEAR-END>                          DEC-31-1998              DEC-31-1997
<PERIOD-START>                             JAN-01-1998              JAN-01-1997
<PERIOD-END>                               MAR-31-1998              MAR-31-1997
<CASH>                                          58,872                   18,840
<INT-BEARING-DEPOSITS>                              71                        1
<FED-FUNDS-SOLD>                                39,313                      637
<TRADING-ASSETS>                                     0                        0
<INVESTMENTS-HELD-FOR-SALE>                    237,704                   89,456
<INVESTMENTS-CARRYING>                         657,405                  585,643
<INVESTMENTS-MARKET>                           655,287                  571,362
<LOANS>                                      3,934,008                2,292,277
<ALLOWANCE>                                     48,635                   27,906
<TOTAL-ASSETS>                               5,341,413                3,044,610
<DEPOSITS>                                   3,491,957                1,655,840
<SHORT-TERM>                                   962,800                  885,928
<LIABILITIES-OTHER>                             43,944                   40,196
<LONG-TERM>                                    454,007                  270,512
<PREFERRED-MANDATORY>                                0                        0
<PREFERRED>                                          0                        0
<COMMON>                                           203                      150
<OTHER-SE>                                     388,502                  191,984
<TOTAL-LIABILITIES-AND-EQUITY>               5,341,413                3,004,610
<INTEREST-LOAN>                                 81,257                   46,664
<INTEREST-INVEST>                               17,806                   11,492
<INTEREST-OTHER>                                     0                        0
<INTEREST-TOTAL>                                99,063                   58,156
<INTEREST-DEPOSIT>                              40,996                   19,594
<INTEREST-EXPENSE>                              62,129                   37,101
<INTEREST-INCOME-NET>                           36,934                   21,055
<LOAN-LOSSES>                                      660                      565
<SECURITIES-GAINS>                                 112                        0
<EXPENSE-OTHER>                                 30,501                   14,827
<INCOME-PRETAX>                                  9,976                    9,246
<INCOME-PRE-EXTRAORDINARY>                       9,976                    5,262
<EXTRAORDINARY>                                      0                        0
<CHANGES>                                            0                        0
<NET-INCOME>                                     5,060                    5,252
<EPS-PRIMARY>                                     0.25                     0.40
<EPS-DILUTED>                                     0.24                     0.39
<YIELD-ACTUAL>                                    2.90                     2.72
<LOANS-NON>                                     13,705                   13,167
<LOANS-PAST>                                         0                      933
<LOANS-TROUBLED>                                   388                      506
<LOANS-PROBLEM>                                      0                        0
<ALLOWANCE-OPEN>                                49,832                   29,013
<CHARGE-OFFS>                                    3,876                    (504)
<RECOVERIES>                                     2,019                       50
<ALLOWANCE-CLOSE>                               48,635                   27,906
<ALLOWANCE-DOMESTIC>                            48,635                   27,906
<ALLOWANCE-FOREIGN>                                  0                        0
<ALLOWANCE-UNALLOCATED>                              0                        0 
        

</TABLE>