<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 9
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM UNAUDITED
INTERIM STATEMENTS AS OF AND FOR THE NINE MONTHS ENDED MARCH 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>                   9-MOS
<FISCAL-YEAR-END>                          JUN-30-1998
<PERIOD-START>                             JUL-01-1997
<PERIOD-END>                               MAR-31-1998
<EXCHANGE-RATE>                                      1
<CASH>                                          89,747
<INT-BEARING-DEPOSITS>                               0
<FED-FUNDS-SOLD>                                 2,182
<TRADING-ASSETS>                                     0
<INVESTMENTS-HELD-FOR-SALE>                    383,470
<INVESTMENTS-CARRYING>                       1,250,064
<INVESTMENTS-MARKET>                         1,258,185
<LOANS>                                      6,330,909
<ALLOWANCE>                                     56,607
<TOTAL-ASSETS>                               8,528,709
<DEPOSITS>                                   5,222,085
<SHORT-TERM>                                 1,196,728
<LIABILITIES-OTHER>                            119,290
<LONG-TERM>                                  1,400,865
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           403
<OTHER-SE>                                     589,338
<TOTAL-LIABILITIES-AND-EQUITY>               8,528,709
<INTEREST-LOAN>                                373,510
<INTEREST-INVEST>                               88,306
<INTEREST-OTHER>                                     0
<INTEREST-TOTAL>                               461,816
<INTEREST-DEPOSIT>                             185,759
<INTEREST-EXPENSE>                             299,811
<INTEREST-INCOME-NET>                          162,005
<LOAN-LOSSES>                                   10,845
<SECURITIES-GAINS>                               1,494
<EXPENSE-OTHER>                                140,374
<INCOME-PRETAX>                                 75,824
<INCOME-PRE-EXTRAORDINARY>                      47,537
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    47,537
<EPS-PRIMARY>                                     1.21
<EPS-DILUTED>                                     1.19
<YIELD-ACTUAL>                                    2.63
<LOANS-NON>                                     46,218
<LOANS-PAST>                                         0
<LOANS-TROUBLED>                                 5,907
<LOANS-PROBLEM>                                      0
<ALLOWANCE-OPEN>                                53,762
<CHARGE-OFFS>                                    9,685
<RECOVERIES>                                     2,031
<ALLOWANCE-CLOSE>                               56,607
<ALLOWANCE-DOMESTIC>                             9,075
<ALLOWANCE-FOREIGN>                                  0
<ALLOWANCE-UNALLOCATED>                         47,532
        

</TABLE>