<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 9
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM UNAUDITED
RESTATED INTERIM FINANCIAL STATEMENTS AS OF AND FOR THE THREE MONTHS ENDED
SEPTEMBER 30, 1997 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
<RESTATED> 
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          JUN-30-1998
<PERIOD-START>                             JUL-01-1997
<PERIOD-END>                               SEP-30-1997
<CASH>                                         128,584
<INT-BEARING-DEPOSITS>                               0
<FED-FUNDS-SOLD>                                 1,500
<TRADING-ASSETS>                                     0
<INVESTMENTS-HELD-FOR-SALE>                    477,348
<INVESTMENTS-CARRYING>                       1,559,242
<INVESTMENTS-MARKET>                         1,556,116
<LOANS>                                      7,499,087
<ALLOWANCE>                                     61,658
<TOTAL-ASSETS>                              10,170,945
<DEPOSITS>                                   6,511,511
<SHORT-TERM>                                 1,713,193
<LIABILITIES-OTHER>                            180,538
<LONG-TERM>                                    999,622
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           460
<OTHER-SE>                                     765,621
<TOTAL-LIABILITIES-AND-EQUITY>              10,170,945
<INTEREST-LOAN>                                152,746
<INTEREST-INVEST>                               35,078
<INTEREST-OTHER>                                     0
<INTEREST-TOTAL>                               187,824
<INTEREST-DEPOSIT>                              79,821
<INTEREST-EXPENSE>                             120,181
<INTEREST-INCOME-NET>                           67,643
<LOAN-LOSSES>                                    1,688
<SECURITIES-GAINS>                                  23
<EXPENSE-OTHER>                                 48,402
<INCOME-PRETAX>                                 40,543
<INCOME-PRE-EXTRAORDINARY>                      29,955
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    25,955
<EPS-PRIMARY>                                      .47
<EPS-DILUTED>                                      .46
<YIELD-ACTUAL>                                    2.83
<LOANS-NON>                                     46,816
<LOANS-PAST>                                         0
<LOANS-TROUBLED>                                 9,108
<LOANS-PROBLEM>                                      0
<ALLOWANCE-OPEN>                                61,261
<CHARGE-OFFS>                                    3,335
<RECOVERIES>                                     1,917
<ALLOWANCE-CLOSE>                               61,658
<ALLOWANCE-DOMESTIC>                            10,197
<ALLOWANCE-FOREIGN>                                  0
<ALLOWANCE-UNALLOCATED>                         51,461
        

</TABLE>