<TABLE> <S> <C>

<ARTICLE> 5
<RESTATED> 
<MULTIPLIER> 1,000
       
<S>                             <C>                     <C>                     <C>                     <C>
<PERIOD-TYPE>                   3-MOS                   6-MOS                   9-MOS                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-31-1997             DEC-31-1997             DEC-31-1997
<PERIOD-START>                             JAN-01-1997             JAN-01-1997             JAN-01-1997             JAN-01-1997
<PERIOD-END>                               MAR-31-1997             JUN-30-1997             SEP-30-1997             DEC-31-1997
<CASH>                                          52,319                  30,822                  47,943                  47,933
<SECURITIES>                                         0                       0                       0                       0
<RECEIVABLES>                                  281,472                 315,083                 346,980                 361,387
<ALLOWANCES>                                    39,097                  50,720                  45,870                  52,590
<INVENTORY>                                          0                       0                       0                       0
<CURRENT-ASSETS>                               389,806                 375,048                 577,284                 462,269
<PP&E>                                       1,960,826               2,020,596               2,071,925               2,120,727
<DEPRECIATION>                                 446,311                 469,219                 493,599                 515,814
<TOTAL-ASSETS>                               2,595,927               2,541,548               2,646,665               2,584,905
<CURRENT-LIABILITIES>                          356,593                 321,405                 329,378                 300,023
<BONDS>                                        805,338                 753,967                 812,191                 751,281
<PREFERRED-MANDATORY>                                0                       0                       0                       0
<PREFERRED>                                          0                       0                       0                       0
<COMMON>                                         7,166                   7,171                   7,190                   7,199
<OTHER-SE>                                   1,058,301               1,096,452               1,132,655               1,155,830
<TOTAL-LIABILITY-AND-EQUITY>                 2,595,927               2,541,548               2,646,665               2,584,905
<SALES>                                              0                       0                       0                       0
<TOTAL-REVENUES>                               546,543               1,105,317               1,656,994               2,228,534
<CGS>                                                0                       0                       0                       0
<TOTAL-COSTS>                                  429,958                 865,962               1,311,625               1,760,923
<OTHER-EXPENSES>                                26,353                  54,424                  82,879                 112,723
<LOSS-PROVISION>                                 5,618                  12,816                  22,116                  34,745
<INTEREST-EXPENSE>                              14,424                  29,422                  43,420                  56,805
<INCOME-PRETAX>                                 58,554                 120,170                 175,359                 240,355
<INCOME-TAX>                                    21,350                  41,762                  60,957                  85,064
<INCOME-CONTINUING>                             37,204                  78,408                 114,402                 155,291
<DISCONTINUED>                                  40,512                  35,948                  37,965                  41,209
<EXTRAORDINARY>                                      0                       0                       0                 (3,216)
<CHANGES>                                            0                       0                       0                 (3,173)
<NET-INCOME>                                    77,716                 114,356                 152,367                 190,111
<EPS-PRIMARY>                                     0.72                    1.06                    1.41                    1.76
<EPS-DILUTED>                                     0.70                    1.03                    1.37                    1.71
        

</TABLE>