<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>                                          65,053
<SECURITIES>                                    52,737
<RECEIVABLES>                                  360,395
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                               522,018
<PP&E>                                         367,062
<DEPRECIATION>                                 126,932
<TOTAL-ASSETS>                               1,099,091
<CURRENT-LIABILITIES>                          316,404
<BONDS>                                        180,689
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                         33
<COMMON>                                         1,035
<OTHER-SE>                                     567,079
<TOTAL-LIABILITY-AND-EQUITY>                 1,099,091
<SALES>                                              0
<TOTAL-REVENUES>                               655,505
<CGS>                                                0
<TOTAL-COSTS>                                  587,154
<OTHER-EXPENSES>                                (4,660)
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               6,216
<INCOME-PRETAX>                                 66,795
<INCOME-TAX>                                    25,163
<INCOME-CONTINUING>                             41,632
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    41,632
<EPS-BASIC>                                       0.40
<EPS-DILUTED>                                     0.38