<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<RESTATED>
       
<S>                             <C>               <C>               <C>
<PERIOD-TYPE>                   3-MOS             6-MOS             9-MOS
<FISCAL-YEAR-END>                   DEC-31-1997       DEC-31-1997       DEC-31-1997
<PERIOD-START>                      JAN-01-1997       JAN-01-1997       JAN-01-1997
<PERIOD-END>                        MAR-31-1997       JUN-30-1997       SEP-30-1997
<EXCHANGE-RATE>                               1                 1                 1
<CASH>                                   20,082               985            23,777
<SECURITIES>                                  0                 0                 0
<RECEIVABLES>                             7,043             7,424             8,547
<ALLOWANCES>                                  0                 0                 0
<INVENTORY>                                   0                 0                 0
<CURRENT-ASSETS>                        101,932            82,934            97,068
<PP&E>                                  687,074           703,619           746,656
<DEPRECIATION>                           63,196            69,001            75,147
<TOTAL-ASSETS>                          725,810           717,552           768,577
<CURRENT-LIABILITIES>                    26,314            25,044            28,231
<BONDS>                                 534,409           534,439           428,520
<PREFERRED-MANDATORY>                         0                 0                 0
<PREFERRED>                                  53                53                53
<COMMON>                                    158               158               273
<OTHER-SE>                              164,876           157,858           301,700
<TOTAL-LIABILITY-AND-EQUITY>            725,810           717,552           768,577<F1>
<SALES>                                       0                 0                 0
<TOTAL-REVENUES>                         30,162            61,375            92,924
<CGS>                                         0                 0                 0
<TOTAL-COSTS>                            26,669            54,299            81,757
<OTHER-EXPENSES>                              0                 0                 0
<LOSS-PROVISION>                            253               475               748
<INTEREST-EXPENSE>                        9,169            18,872            27,951
<INCOME-PRETAX>                             902             1,813             3,364
<INCOME-TAX>                                  0                 0                 0
<INCOME-CONTINUING>                         902             1,813             3,364
<DISCONTINUED>                                0                 0                 0
<EXTRAORDINARY>                               0                 0           (2,061)<F2>
<CHANGES>                                     0                 0                 0
<NET-INCOME>                                902             1,813             1,303
<EPS-PRIMARY>                            (0.15)            (0.29)            (0.48)
<EPS-DILUTED>                            (0.15)            (0.29)            (0.48)
<FN>
<F1>Includes minority interests of $9,800.
<F2>Represents an extraordinary loss on early extinguishment of debt.
</FN>
        

</TABLE>