<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM FORM 10-Q
AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<RESTATED>
<MULTIPLIER> 1,000

<S>                             <C>                     <C>
<PERIOD-TYPE>                   9-MOS                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-31-1996
<PERIOD-START>                             JAN-01-1997             JAN-01-1996
<PERIOD-END>                               SEP-30-1997             SEP-30-1996
<CASH>                                           6,916                   8,932
<SECURITIES>                                         0                       0
<RECEIVABLES>                                   11,393                  10,526
<ALLOWANCES>                                       891                     738
<INVENTORY>                                          0                       0
<CURRENT-ASSETS>                                     0                       0
<PP&E>                                         414,135                 290,874
<DEPRECIATION>                                  31,875                  26,857
<TOTAL-ASSETS>                                 419,274                 293,186
<CURRENT-LIABILITIES>                                0                       0
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                           168                       0
<OTHER-SE>                                     307,593                  61,808
<TOTAL-LIABILITY-AND-EQUITY>                   419,274                 293,186
<SALES>                                              0                       0
<TOTAL-REVENUES>                                31,936                  25,423
<CGS>                                                0                       0
<TOTAL-COSTS>                                        0                       0
<OTHER-EXPENSES>                                16,306                  14,304
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                              11,253                  10,791
<INCOME-PRETAX>                                  4,377                     328
<INCOME-TAX>                                        65                     135
<INCOME-CONTINUING>                                  0                       0
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                  1,043                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                     3,163                     171
<EPS-PRIMARY>                                      .19<F1>                 .01<F1>
<EPS-DILUTED>                                      .19<F1>                 .01<F1>
<FN>
<F1>EARNINGS PER SHARE IS BASED ON WEIGHTED AVERAGE SHARES OUTSTANDING OF
16,849,802 ASSUMED TO HAVE BEEN OUTSTANDING DURING ALL PERIODS PRESENTED IN THE
STATEMENTS OF INCOME.
</FN>


</TABLE>