<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM SEC FORM
10-K AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-END>                               DEC-31-1997
<CASH>                                         101,419
<SECURITIES>                                         0
<RECEIVABLES>                                   89,908
<ALLOWANCES>                                     6,604
<INVENTORY>                                     18,492
<CURRENT-ASSETS>                               210,979
<PP&E>                                         971,462
<DEPRECIATION>                                 297,773
<TOTAL-ASSETS>                               1,011,552
<CURRENT-LIABILITIES>                          186,591
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           902
<OTHER-SE>                                     457,936
<TOTAL-LIABILITY-AND-EQUITY>                 1,011,552
<SALES>                                        239,053
<TOTAL-REVENUES>                               840,263
<CGS>                                          204,156
<TOTAL-COSTS>                                  762,472
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                 3,603
<INTEREST-EXPENSE>                              34,044
<INCOME-PRETAX>                                 58,807
<INCOME-TAX>                                  (39,254)
<INCOME-CONTINUING>                             96,842
<DISCONTINUED>                                  25,146
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   121,988
<EPS-PRIMARY>                                     1.43
<EPS-DILUTED>                                     1.42