<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, 1998, JUNE 30, 1998 AND SEPTEMBER 30, 1998 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-31-1998             DEC-31-1998             DEC-31-1998
<PERIOD-START>                             JAN-01-1998             JAN-01-1998             JAN-01-1998
<PERIOD-END>                               MAR-31-1998             JUN-30-1998             SEP-30-1998
<CASH>                                         219,548                 264,687                 228,104
<INT-BEARING-DEPOSITS>                          18,100                  18,529                  13,576
<FED-FUNDS-SOLD>                               128,157                  76,708                  60,394
<TRADING-ASSETS>                                     0                       0                       0
<INVESTMENTS-HELD-FOR-SALE>                  1,866,075               1,984,019               1,960,613
<INVESTMENTS-CARRYING>                         122,225                 106,168                  89,765
<INVESTMENTS-MARKET>                           122,700                 106,512                  90,481
<LOANS>                                      3,235,333               3,344,083               3,534,014
<ALLOWANCE>                                     41,491                  43,848                  47,182
<TOTAL-ASSETS>                               5,990,439               6,123,635               6,213,130
<DEPOSITS>                                   5,003,689               5,025,979               5,041,394
<SHORT-TERM>                                   184,700                 384,934                 319,912
<LIABILITIES-OTHER>                            140,372                  50,938                 176,958
<LONG-TERM>                                    127,251                 127,900                 119,340
<PREFERRED-MANDATORY>                          120,000                 120,000                 120,000
<PREFERRED>                                          0                       0                       0
<COMMON>                                           501                     503                     506
<OTHER-SE>                                     413,926                 413,381                 435,020
<TOTAL-LIABILITIES-AND-EQUITY>               5,990,439               6,123,635               6,213,130
<INTEREST-LOAN>                                 78,937                 161,915                 250,970
<INTEREST-INVEST>                               27,990                  59,737                  92,139
<INTEREST-OTHER>                                 1,510                   3,218                   4,411
<INTEREST-TOTAL>                               108,437                 224,870                 347,520
<INTEREST-DEPOSIT>                              41,266                  83,841                 126,723
<INTEREST-EXPENSE>                              45,569                  94,661                 146,736
<INTEREST-INCOME-NET>                           62,868                 130,209                 200,784
<LOAN-LOSSES>                                    1,933                   6,305                  11,270
<SECURITIES-GAINS>                                 481                     985                   1,339
<EXPENSE-OTHER>                                 52,053                 116,630                 176,547
<INCOME-PRETAX>                                 23,724                  38,912                  61,229
<INCOME-PRE-EXTRAORDINARY>                      17,215                  28,098                  19,113
<EXTRAORDINARY>                                   (68)                  (3908)                  (3908)
<CHANGES>                                            0                       0                       0
<NET-INCOME>                                    17,147                  24,190                  38,208
<EPS-BASIC>                                        .34                     .48                     .76
<EPS-DILUTED>                                      .33                     .47                     .75
<YIELD-ACTUAL>                                       0                       0                       0
<LOANS-NON>                                     12,224                  11,693                  18,329
<LOANS-PAST>                                     6,779                   4,410                   3,334
<LOANS-TROUBLED>                                   123                     105                     180
<LOANS-PROBLEM>                                      0                       0                       0
<ALLOWANCE-OPEN>                                41,387                  41,491                  43,848
<CHARGE-OFFS>                                    2,770                   2,906                   4,430
<RECOVERIES>                                       941                     891                     841
<ALLOWANCE-CLOSE>                               41,491                  43,848                  47,182
<ALLOWANCE-DOMESTIC>                                 0                       0                       0
<ALLOWANCE-FOREIGN>                                  0                       0                       0
<ALLOWANCE-UNALLOCATED>                              0                       0                       0


</TABLE>