<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 9
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM UNAUDITED
INTERIM FINANCIAL STATEMENTS AS OF AND FOR THE NINE MONTHS ENDED MARCH 31, 1999
AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
       
<S>                             <C>
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          JUN-30-1999
<PERIOD-START>                             JUL-01-1998
<PERIOD-END>                               MAR-31-1999
<EXCHANGE-RATE>                                      1
<CASH>                                         192,325
<INT-BEARING-DEPOSITS>                               0
<FED-FUNDS-SOLD>                                15,802
<TRADING-ASSETS>                                     0
<INVESTMENTS-HELD-FOR-SALE>                    573,341
<INVESTMENTS-CARRYING>                       1,723,589
<INVESTMENTS-MARKET>                         1,720,566
<LOANS>                                      9,479,216
<ALLOWANCE>                                     82,025
<TOTAL-ASSETS>                              12,866,543
<DEPOSITS>                                   7,721,529
<SHORT-TERM>                                 2,781,000
<LIABILITIES-OTHER>                            117,480
<LONG-TERM>                                  1,264,316
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           609  
<OTHER-SE>                                     981,609
<TOTAL-LIABILITIES-AND-EQUITY>              12,866,543
<INTEREST-LOAN>                                520,335
<INTEREST-INVEST>                               98,313
<INTEREST-OTHER>                                     0
<INTEREST-TOTAL>                               618,648
<INTEREST-DEPOSIT>                             241,706
<INTEREST-EXPENSE>                             375,171
<INTEREST-INCOME-NET>                          243,477
<LOAN-LOSSES>                                    9,600
<SECURITIES-GAINS>                               4,255
<EXPENSE-OTHER>                                199,795
<INCOME-PRETAX>                                112,713
<INCOME-PRE-EXTRAORDINARY>                      62,518
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    65,518
<EPS-PRIMARY>                                     1.05
<EPS-DILUTED>                                     1.04
<YIELD-ACTUAL>                                    2.99
<LOANS-NON>                                     65,775
<LOANS-PAST>                                         0
<LOANS-TROUBLED>                                 6,773
<LOANS-PROBLEM>                                      0
<ALLOWANCE-OPEN>                                64,757
<CHARGE-OFFS>                                   10,571
<RECOVERIES>                                     2,393
<ALLOWANCE-CLOSE>                               82,025
<ALLOWANCE-DOMESTIC>                             6,890
<ALLOWANCE-FOREIGN>                                  0
<ALLOWANCE-UNALLOCATED>                         75,135
        

</TABLE>