<TABLE> <S> <C>

<PAGE>

<ARTICLE> 9
<MULTIPLIER> 1,000

<S>                             <C>                     <C>
<PERIOD-TYPE>                   6-MOS                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-2000             DEC-31-1999
<PERIOD-START>                             JAN-01-2000             JAN-01-1999
<PERIOD-END>                               JUN-30-2000             JUN-30-1999
<CASH>                                         207,840                 172,457
<INT-BEARING-DEPOSITS>                          36,342                  23,007
<FED-FUNDS-SOLD>                                34,550                  63,838
<TRADING-ASSETS>                                37,660                  82,666
<INVESTMENTS-HELD-FOR-SALE>                    656,163                 753,423
<INVESTMENTS-CARRYING>                       1,926,151               1,696,891
<INVESTMENTS-MARKET>                         1,811,414               1,639,168
<LOANS>                                      4,266,967               3,719,854
<ALLOWANCE>                                     62,064                  58,389
<TOTAL-ASSETS>                               7,438,888               6,737,423
<DEPOSITS>                                   4,745,388               4,450,268
<SHORT-TERM>                                 1,887,684                 718,414
<LIABILITIES-OTHER>                            119,600                 180,166
<LONG-TERM>                                     48,969                 792,878
<PREFERRED-MANDATORY>                          587,332                 545,794
<PREFERRED>                                          0                       0
<COMMON>                                             0                       0
<OTHER-SE>                                           0                       0
<TOTAL-LIABILITIES-AND-EQUITY>               7,438,888               6,737,423
<INTEREST-LOAN>                                181,597                 149,556
<INTEREST-INVEST>                               85,503                  73,773
<INTEREST-OTHER>                                 3,660                   3,987
<INTEREST-TOTAL>                               270,760                 227,316
<INTEREST-DEPOSIT>                              96,816                  76,677
<INTEREST-EXPENSE>                              51,813                  35,327
<INTEREST-INCOME-NET>                          122,131                 115,312
<LOAN-LOSSES>                                    4,217                   6,530
<SECURITIES-GAINS>                                 327                 (2,116)
<EXPENSE-OTHER>                                 89,451                  79,364
<INCOME-PRETAX>                                 79,031                  75,674
<INCOME-PRE-EXTRAORDINARY>                      79,031                  75,674
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                    58,969                  50,952
<EPS-BASIC>                                        .49                     .48
<EPS-DILUTED>                                      .49                     .47
<YIELD-ACTUAL>                                    3.72                    4.10
<LOANS-NON>                                      1,377                   1,601
<LOANS-PAST>                                     6,142                   4,395
<LOANS-TROUBLED>                                     0                       0
<LOANS-PROBLEM>                                      0                     483
<ALLOWANCE-OPEN>                                62,555                  55,881
<CHARGE-OFFS>                                    6,556                   6,190
<RECOVERIES>                                     1,848                   2,168
<ALLOWANCE-CLOSE>                               62,064                  58,389
<ALLOWANCE-DOMESTIC>                            62,064                  58,389
<ALLOWANCE-FOREIGN>                                  0                       0
<ALLOWANCE-UNALLOCATED>                              0                       0


</TABLE>