<TABLE> <S> <C>

<PAGE>
<ARTICLE> 9
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM UNAUDITED
FINANCIAL STATEMENTS CONTAINED IN THE COMPANY'S QUARTERLY REPORTS IN FORM 10-Q
FOR QUARTERS ENDED MARCH 31, 1997, JUNE 30, 1997 AND SEPTEMBER 30, 1997 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<RESTATED> 
<MULTIPLIER> 1,000
       
<S>                             <C>                     <C>                     <C>
<PERIOD-TYPE>                   3-MOS                   6-MOS                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-31-1997             DEC-31-1997
<PERIOD-START>                             JAN-01-1997             JAN-01-1997             JAN-01-1997
<PERIOD-END>                               MAR-31-1997             JUN-30-1997             SEP-30-1997
<CASH>                                         123,430                 124,364                 209,498
<INT-BEARING-DEPOSITS>                           9,953                  14,898                  12,782
<FED-FUNDS-SOLD>                                   100                     705                     260
<TRADING-ASSETS>                                     0                       0                       0
<INVESTMENTS-HELD-FOR-SALE>                    508,837                 481,500                 920,835
<INVESTMENTS-CARRYING>                         223,768                 229,857                 227,234
<INVESTMENTS-MARKET>                           222,665                 230,204                 228,545
<LOANS>                                      2,081,912               2,175,593               2,617,085
<ALLOWANCE>                                     27,580                  30,137                  37,522
<TOTAL-ASSETS>                               3,095,065               3,164,899               4,248,258
<DEPOSITS>                                   2,493,500               2,470,691               3,457,537
<SHORT-TERM>                                   155,332                 189,151                 215,345
<LIABILITIES-OTHER>                            118,831                 105,106                 122,961
<LONG-TERM>                                     18,644                  78,566                 120,988
<PREFERRED-MANDATORY>                                0                       0                       0
<PREFERRED>                                          0                       0                       0
<COMMON>                                           187                     187                     187
<OTHER-SE>                                     248,552                 261,198                 271,240
<TOTAL-LIABILITIES-AND-EQUITY>               2,341,228               3,164,899               4,248,258
<INTEREST-LOAN>                                 50,615                  53,124                  65,825
<INTEREST-INVEST>                               11,465                  11,330                  16,697
<INTEREST-OTHER>                                    45                     324                     281
<INTEREST-TOTAL>                                62,125                  64,778                  82,803
<INTEREST-DEPOSIT>                              21,166                  21,369                  29,292
<INTEREST-EXPENSE>                              25,117                  25,972                  35,132
<INTEREST-INCOME-NET>                           37,008                  38,806                  47,671
<LOAN-LOSSES>                                    1,761                   3,271                   2,785
<SECURITIES-GAINS>                                   0                      64                      62
<EXPENSE-OTHER>                                 27,060                  30,656                  37,894
<INCOME-PRETAX>                                 16,370                  16,664                  17,873
<INCOME-PRE-EXTRAORDINARY>                      10,797                  11,135                  12,299
<EXTRAORDINARY>                                  (265)                       0                       0
<CHANGES>                                            0                       0                       0
<NET-INCOME>                                    10,532                  11,135                  12,299
<EPS-PRIMARY>                                      .60                     .60                     .66
<EPS-DILUTED>                                      .56                     .58                     .65
<YIELD-ACTUAL>                                       0                       0                       0
<LOANS-NON>                                     14,886                  14,642                  17,185
<LOANS-PAST>                                     2,028                   2,077                   6,411
<LOANS-TROUBLED>                                   251                     195                     156
<LOANS-PROBLEM>                                      0                       0                       0
<ALLOWANCE-OPEN>                                26,215                  26,215                  26,215
<CHARGE-OFFS>                                    1,786                   3,486                   7,553
<RECOVERIES>                                       607                   1,266                   2,228
<ALLOWANCE-CLOSE>                               27,580                  30,137                  37,522
<ALLOWANCE-DOMESTIC>                                 0                       0                       0
<ALLOWANCE-FOREIGN>                                  0                       0                       0
<ALLOWANCE-UNALLOCATED>                              0                       0                       0
        

</TABLE>