<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 5
<LEGEND>
THE SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE CONDENSED
CONSOLIDATED BALANCE SHEET AS OF SEPTEMBER 30, 1998 AND THE CONDENSED
CONSOLIDATED STATEMENTS OF OPERATIONS FOR THE NINE AND THREE MONTHS ENDED
SEPTEMBER 30, 1998 AND FOR THE NINE AND THREE MONTHS ENDED SEPTEMBER 30, 1997 IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS. (REVISED,
SEE NOTE 1 IN THE CONDENSED CONSOLIDATED FINANCIAL STATEMENTS.)
<MULTIPLIER> 1,000
       
<S>                             <C>                     <C>
<PERIOD-TYPE>                   3-MOS                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-31-1997
<PERIOD-START>                             JUL-01-1997             JAN-01-1997
<PERIOD-END>                               SEP-30-1997             SEP-30-1997
<CASH>                                               0                       0
<SECURITIES>                                         0                       0
<RECEIVABLES>                                        0                       0
<ALLOWANCES>                                         0                       0
<INVENTORY>                                          0                       0
<CURRENT-ASSETS>                                     0                       0
<PP&E>                                               0                       0
<DEPRECIATION>                                       0                       0
<TOTAL-ASSETS>                                       0                       0
<CURRENT-LIABILITIES>                                0                       0
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                             0                       0
<OTHER-SE>                                           0                       0
<TOTAL-LIABILITY-AND-EQUITY>                         0                       0
<SALES>                                              0                       0
<TOTAL-REVENUES>                                77,730                 221,296
<CGS>                                                0                       0
<TOTAL-COSTS>                                        0                       0
<OTHER-EXPENSES>                                36,323                  96,919
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                               8,039                  20,524
<INCOME-PRETAX>                                 15,636                  54,412
<INCOME-TAX>                                     6,308                  22,362
<INCOME-CONTINUING>                              9,328                  32,050
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                     9,328                  32,050
<EPS-PRIMARY>                                     0.20                    0.75
<EPS-DILUTED>                                     0.20                    0.75
        


</TABLE>