<TABLE> <S> <C>

<PAGE>
<ARTICLE> 9
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM AUDITED
FINANCIAL STATEMENTS CONTAINED IN THE COMPANY'S ANNUAL REPORT IN FORM 10-K FOR
THE YEAR ENDED DECEMBER 31, 1997 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE
TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               DEC-31-1997
<CASH>                                         222,088
<INT-BEARING-DEPOSITS>                           1,287
<FED-FUNDS-SOLD>                                12,690
<TRADING-ASSETS>                                     0
<INVESTMENTS-HELD-FOR-SALE>                  1,498,877
<INVESTMENTS-CARRYING>                         180,512
<INVESTMENTS-MARKET>                           182,335
<LOANS>                                      2,637,057
<ALLOWANCE>                                     36,194
<TOTAL-ASSETS>                               4,855,526
<DEPOSITS>                                   3,619,334
<SHORT-TERM>                                   230,571
<LIABILITIES-OTHER>                            429,851
<LONG-TERM>                                    116,476
<PREFERRED-MANDATORY>                          120,000
<PREFERRED>                                          0
<COMMON>                                           204
<OTHER-SE>                                     339,090
<TOTAL-LIABILITIES-AND-EQUITY>               4,855,526
<INTEREST-LOAN>                                218,588
<INTEREST-INVEST>                               59,103
<INTEREST-OTHER>                                   906
<INTEREST-TOTAL>                               278,597
<INTEREST-DEPOSIT>                             102,632
<INTEREST-EXPENSE>                             117,253
<INTEREST-INCOME-NET>                          161,344
<LOAN-LOSSES>                                    5,352
<SECURITIES-GAINS>                                 463
<EXPENSE-OTHER>                                125,190
<INCOME-PRETAX>                                 67,366
<INCOME-PRE-EXTRAORDINARY>                      45,850
<EXTRAORDINARY>                                    702
<CHANGES>                                            0
<NET-INCOME>                                    46,552
<EPS-PRIMARY>                                     2.52
<EPS-DILUTED>                                     2.44
<YIELD-ACTUAL>                                       0
<LOANS-NON>                                     12,507
<LOANS-PAST>                                     3,616
<LOANS-TROUBLED>                                   140
<LOANS-PROBLEM>                                      0
<ALLOWANCE-OPEN>                                26,215
<CHARGE-OFFS>                                    7,857
<RECOVERIES>                                     2,419
<ALLOWANCE-CLOSE>                               36,194
<ALLOWANCE-DOMESTIC>                                 0
<ALLOWANCE-FOREIGN>                                  0
<ALLOWANCE-UNALLOCATED>                              0
        

</TABLE>