<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<RESTATED> 
<MULTIPLIER> 1,000
       
<S>                             <C>                     <C>                     <C>                     <C>
<C>
<PERIOD-TYPE>                   12-MOS                   12-MOS                   3-MOS                   6-MOS
9-MOS
<FISCAL-YEAR-END>                          DEC-31-1995             DEC-31-1996             DEC-31-1996             DEC-31-1996
             DEC-31-1996
<PERIOD-END>                               DEC-31-1995             DEC-31-1996             MAR-31-1996             JUN-30-1996
             SEP-30-1996
<CASH>                                           1,543                   4,095                   2,033                     644
                     333
<SECURITIES>                                         0                       0                       0                       0
                       0
<RECEIVABLES>                                    7,171                   6,708                   8,129                   7,550
                   7,093
<ALLOWANCES>                                     1,524                   1,848                   1,635                   1,627
                   1,797
<INVENTORY>                                          0                       0                       0                       0
                       0
<CURRENT-ASSETS>                                15,070                  15,539                  16,226                  20,032
                  12,506
<PP&E>                                         367,088                 389,634                 376,163                 365,985
                 375,914
<DEPRECIATION>                                  54,388                  48,978                  56,408                  53,694
                  50,560
<TOTAL-ASSETS>                                 327,770                 356,195                 335,981                 326,400
                 337,860
<CURRENT-LIABILITIES>                            5,370                   3,584                   4,846                   3,720
                   3,862
<BONDS>                                        142,806                 178,452                 152,589                 145,612
                 156,694
<PREFERRED-MANDATORY>                                0                       0                       0                       0
                       0
<PREFERRED>                                          0                       0                       0                       0
                       0
<COMMON>                                       262,130                 262,340                 262,151                 262,151
                 262,240
<OTHER-SE>                                    (82,970)                (88,615)                (84,039)                (85,517)
                (85,370)
<TOTAL-LIABILITY-AND-EQUITY>                   327,770                 356,195                 335,981                 326,400
                 337,860
<SALES>                                         48,188                  46,864                  12,134                  24,192
                  35,701
<TOTAL-REVENUES>                                48,669                  47,314                  12,245                  24,412
                  36,023
<CGS>                                           12,067                  12,603                   3,124                   6,326
                   9,538
<TOTAL-COSTS>                                   12,067                  12,603                   3,124                   6,326
                   9,538
<OTHER-EXPENSES>                                38,621                  13,665                   3,107                   6,357
                   9,933
<LOSS-PROVISION>                                   972                     410                     102                     210
                     310
<INTEREST-EXPENSE>                              11,960                  10,744                   2,868                   5,689
                   8,251
<INCOME-PRETAX>                               (14,951)                   9,857                   3,044                   5,830
                   7,991
<INCOME-TAX>                                         0                       0                       0                       0
                       0
<INCOME-CONTINUING>                           (14,951)                   9,857                   3,044                   5,830
                   7,991
<DISCONTINUED>                                       0                       0                       0                       0
                       0
<EXTRAORDINARY>                                  2,233                   1,414                       0                     (1)
                   2,261
<CHANGES>                                            0                       0                       0                       0
                       0
<NET-INCOME>                                  (12,718)                  11,271                   3,044                   5,829
                  10,252
<EPS-PRIMARY>                                    (.75)                   (.66)                     .18                     .34
                     .60
<EPS-DILUTED>                                    (.75)                   (.66)                     .18                     .34
                     .60
        

</TABLE>