<TABLE> <S> <C>

<PAGE>

<ARTICLE> 9
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM UNAUDITED
INTERIM FINANCIAL STATEMENTS AS OF AND FOR THE SIX MONTHS ENDED DECEMBER 31,
1998. AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL 
STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          JUN-30-1999
<PERIOD-START>                             JUL-01-1998
<PERIOD-END>                               DEC-31-1998
<EXCHANGE-RATE>                                      1
<CASH>                                         171,184
<INT-BEARING-DEPOSITS>                               0
<FED-FUNDS-SOLD>                                 3,376
<TRADING-ASSETS>                                     0
<INVESTMENTS-HELD-FOR-SALE>                    448,885
<INVESTMENTS-CARRYING>                       1,581,415
<INVESTMENTS-MARKET>                         1,584,777
<LOANS>                                      9,086,858
<ALLOWANCE>                                     72,447
<TOTAL-ASSETS>                              12,076,377
<DEPOSITS>                                   7,420,634
<SHORT-TERM>                                   253,000
<LIABILITIES-OTHER>                            163,187
<LONG-TERM>                                  3,295,772
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           607
<OTHER-SE>                                     943,177
<TOTAL-LIABILITIES-AND-EQUITY>              12,076,377
<INTEREST-LOAN>                                341,052
<INTEREST-INVEST>                               61,524
<INTEREST-OTHER>                                     0
<INTEREST-TOTAL>                               402,576
<INTEREST-DEPOSIT>                             162,584
<INTEREST-EXPENSE>                             246,541
<INTEREST-INCOME-NET>                          156,035
<LOAN-LOSSES>                                    6,800
<SECURITIES-GAINS>                               3,307
<EXPENSE-OTHER>                                125,715
<INCOME-PRETAX>                                 78,481
<INCOME-PRE-EXTRAORDINARY>                      46,349
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    46,349
<EPS-PRIMARY>                                      .53
<EPS-DILUTED>                                      .52
<YIELD-ACTUAL>                                    2.98
<LOANS-NON>                                     64,965
<LOANS-PAST>                                         0
<LOANS-TROUBLED>                                 7,096
<LOANS-PROBLEM>                                      0
<ALLOWANCE-OPEN>                                64,757
<CHARGE-OFFS>                                    6,707
<RECOVERIES>                                     1,316
<ALLOWANCE-CLOSE>                               72,447
<ALLOWANCE-DOMESTIC>                             7,399
<ALLOWANCE-FOREIGN>                                  0
<ALLOWANCE-UNALLOCATED>                         65,048
        

</TABLE>