<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
COMPANY'S CONDENSED CONSOLIDATED FINANCIAL STATEMENTS INCLUDED IN ITS QUARTERLY
REPORT ON FORM 10-Q FOR THE QUARTERLY PERIOD ENDED JUNE 30, 1998 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<RESTATED>
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-END>                               JUN-30-1998
<CASH>                                          41,473
<SECURITIES>                                         0
<RECEIVABLES>                                  440,328<F1>
<ALLOWANCES>                                    15,886<F2>
<INVENTORY>                                     29,465
<CURRENT-ASSETS>                               581,618
<PP&E>                                       1,812,717
<DEPRECIATION>                                 666,215
<TOTAL-ASSETS>                               2,140,064
<CURRENT-LIABILITIES>                          348,079
<BONDS>                                        761,403
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        11,024
<OTHER-SE>                                     843,304
<TOTAL-LIABILITY-AND-EQUITY>                 2,140,064
<SALES>                                      1,409,815
<TOTAL-REVENUES>                             1,415,075
<CGS>                                                0
<TOTAL-COSTS>                                1,274,022
<OTHER-EXPENSES>                                48,070
<LOSS-PROVISION>                                     0<F3>
<INTEREST-EXPENSE>                              32,081
<INCOME-PRETAX>                                 60,902
<INCOME-TAX>                                    21,316
<INCOME-CONTINUING>                             39,586
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                      (4,415)
<NET-INCOME>                                    35,171
<EPS-BASIC>                                        .34
<EPS-DILUTED>                                      .33
<FN>
<F1>Excludes $22,562 of long-term notes receivable.
<F2>Excludes $3,193 of allowance for doubtful long-term notes receivable.
<F3>Included in Total costs and expenses line.
</FN>