<ARTICLE> 5
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               DEC-31-1998
<CASH>                                         124,729
<SECURITIES>                                    32,241
<RECEIVABLES>                                  316,314
<ALLOWANCES>                                     1,609
<INVENTORY>                                          0
<CURRENT-ASSETS>                               515,388
<PP&E>                                         376,139
<DEPRECIATION>                                 125,271
<TOTAL-ASSETS>                               1,014,751
<CURRENT-LIABILITIES>                          320,136
<BONDS>                                        157,432
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           780
<OTHER-SE>                                     501,818
<TOTAL-LIABILITY-AND-EQUITY>                 1,014,751
<SALES>                                              0
<TOTAL-REVENUES>                             1,188,012
<CGS>                                                0
<TOTAL-COSTS>                                1,062,150
<OTHER-EXPENSES>                               (8,136)
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              11,460
<INCOME-PRETAX>                                122,538
<INCOME-TAX>                                    38,859
<INCOME-CONTINUING>                             83,679
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    83,679
<EPS-PRIMARY>                                     1.08
<EPS-DILUTED>                                     1.06