<ARTICLE> 5
<RESTATED> 
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               JUN-30-1998
<CASH>                                          46,785
<SECURITIES>                                    51,960
<RECEIVABLES>                                  309,307
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                               444,687
<PP&E>                                         316,202
<DEPRECIATION>                                 101,394
<TOTAL-ASSETS>                                 903,124
<CURRENT-LIABILITIES>                          265,008
<BONDS>                                        179,300
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           766
<OTHER-SE>                                     435,086
<TOTAL-LIABILITY-AND-EQUITY>                   903,124
<SALES>                                              0
<TOTAL-REVENUES>                               544,905
<CGS>                                                0
<TOTAL-COSTS>                                  487,977
<OTHER-EXPENSES>                                (4,553)<F1>
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               5,481
<INCOME-PRETAX>                                 56,000
<INCOME-TAX>                                    17,998
<INCOME-CONTINUING>                             38,002
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    38,002
<EPS-PRIMARY>                                     0.50
<EPS-DILUTED>                                     0.49
<FN>
<F1>REPRESENTS INCOME
</FN>