<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> JUN-30-2000
<CASH> 105,157
<SECURITIES> 68,467
<RECEIVABLES> 82,119
<ALLOWANCES> 15,906
<INVENTORY> 0
<CURRENT-ASSETS> 243,617
<PP&E> 1,012,331
<DEPRECIATION> 234,688
<TOTAL-ASSETS> 1,101,618
<CURRENT-LIABILITIES> 200,404
<BONDS> 400,000
0
0
<COMMON> 1,054
<OTHER-SE> 458,479
<TOTAL-LIABILITY-AND-EQUITY> 1,101,618
<SALES> 0
<TOTAL-REVENUES> 231,911
<CGS> 0
<TOTAL-COSTS> 82,547
<OTHER-EXPENSES> 44,799
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 20,614
<INCOME-PRETAX> 12,559
<INCOME-TAX> 5,652
<INCOME-CONTINUING> 6,907
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 6,907
<EPS-BASIC> 0.07
<EPS-DILUTED> 0.06
</TABLE>