<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<RESTATED>
       
<S>                             <C>               <C>               <C>               <C>
<PERIOD-TYPE>                   3-MOS             6-MOS             9-MOS             12-MOS
<FISCAL-YEAR-END>                   DEC-31-1996       DEC-31-1996       DEC-31-1996       DEC-31-1996
<PERIOD-START>                      JAN-01-1996       JAN-01-1996       JAN-01-1996       JAN-01-1996
<PERIOD-END>                        MAR-31-1996       JUN-30-1996       SEP-30-1996       DEC-31-1996
<EXCHANGE-RATE>                               1                 1                 1                 1
<CASH>                                    2,589             4,040             9,602             3,924
<SECURITIES>                                  0                 0                 0                 0
<RECEIVABLES>                             8,772             6,588             6,500             6,096
<ALLOWANCES>                                  0                 0                 0             1,349
<INVENTORY>                                   0                 0                 0                 0
<CURRENT-ASSETS>                         36,387            26,452            46,281            83,718
<PP&E>                                  463,458           482,612           492,317           640,759
<DEPRECIATION>                           44,139            48,272            52,525            57,674
<TOTAL-ASSETS>                          455,706           460,792           486,073           666,803
<CURRENT-LIABILITIES>                    18,885            30,899            26,278            28,071
<BONDS>                                 306,020           318,777           314,668           499,523
<PREFERRED-MANDATORY>                         0                 0                 0                 0
<PREFERRED>                                  93                51                51                51
<COMMON>                                     29                96               134               134
<OTHER-SE>                              119,812           110,539           144,942           139,024
<TOTAL-LIABILITY-AND-EQUITY>            455,706<F1>       460,792<F1>       486,073           666,803
<SALES>                                       0                 0                 0                 0
<TOTAL-REVENUES>                         21,131            41,281            63,112            89,040
<CGS>                                         0                 0                 0                 0
<TOTAL-COSTS>                            18,074            42,174<F2>        59,830<F2>        82,054<F2>
<OTHER-EXPENSES>                              0                 0                 0                 0
<LOSS-PROVISION>                            224               281               437               710
<INTEREST-EXPENSE>                        6,056            12,204            17,343            24,485
<INCOME-PRETAX>                           4,534             5,577             7,942             9,078
<INCOME-TAX>                                  0                 0                 0                 0
<INCOME-CONTINUING>                       4,534             5,577             7,942             9,078
<DISCONTINUED>                                0                 0                 0                 0
<EXTRAORDINARY>                               0           (1,017)<F3>       (1,017)<F3>       (1,017)<F3>
<CHANGES>                                     0                 0                 0                 0
<NET-INCOME>                              4,534             4,560             6,925             8,061
<EPS-PRIMARY>                            (0.24)            (1.22)            (0.67)            (0.75)
<EPS-DILUTED>                            (0.24)            (1.22)            (0.67)            (0.75)
<FN>
<F1>Includes  minority  interests  of $10,867 and $430 at March 31 and  June 30,
1996, respectively.
<F2>Includes  a  nonrecurring  charge  of  $6,131  related  to  a  binding  loan
commitment that the Company obtained on June 5, 1996.
<F3>Represents an extraordinary  loss (net of minority interest in the amount of
$3,263) on early extinguishment of debt.
</FN>
        

</TABLE>