<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONDENSED CONSOLIDATED BALANCE SHEETS AND CONDENSED CONSOLIDATED STATEMENTS OF
OPERATIONS FOUND ON PAGES 3 AND 4 OF THE COMPANY'S FORM 10-Q FOR THE NINE MONTHS
ENDED SEPTEMBER 30, 2000 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 9-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> SEP-30-2000
<CASH> 63,345
<SECURITIES> 0
<RECEIVABLES> 47,136
<ALLOWANCES> 0
<INVENTORY> 5,217
<CURRENT-ASSETS> 147,628
<PP&E> 1,352,611
<DEPRECIATION> (285,464)
<TOTAL-ASSETS> 1,377,206
<CURRENT-LIABILITIES> 136,249
<BONDS> 978,404
0
0
<COMMON> 425
<OTHER-SE> 250,714
<TOTAL-LIABILITY-AND-EQUITY> 1,377,206
<SALES> 0
<TOTAL-REVENUES> 748,233
<CGS> 0
<TOTAL-COSTS> 382,547
<OTHER-EXPENSES> 48,295
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 67,919
<INCOME-PRETAX> 92,935
<INCOME-TAX> 33,922
<INCOME-CONTINUING> 59,013
<DISCONTINUED> 0
<EXTRAORDINARY> 383
<CHANGES> 0
<NET-INCOME> 58,630
<EPS-BASIC> 0.97
<EPS-DILUTED> 0.93
</TABLE>