<ARTICLE> 5
<RESTATED> 
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               JUN-30-1997
<EXCHANGE-RATE>                                      1
<CASH>                                          38,677
<SECURITIES>                                         0
<RECEIVABLES>                                  349,543
<ALLOWANCES>                                         0
<INVENTORY>                                     16,447
<CURRENT-ASSETS>                               453,825
<PP&E>                                         273,249
<DEPRECIATION>                                  73,589
<TOTAL-ASSETS>                               1,423,600
<CURRENT-LIABILITIES>                          213,210
<BONDS>                                        298,250
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                       636,232
<OTHER-SE>                                      88,004
<TOTAL-LIABILITY-AND-EQUITY>                 1,423,600
<SALES>                                              0
<TOTAL-REVENUES>                               518,006
<CGS>                                                0
<TOTAL-COSTS>                                  459,999
<OTHER-EXPENSES>                                 4,176
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              11,425
<INCOME-PRETAX>                                 42,406
<INCOME-TAX>                                    16,393
<INCOME-CONTINUING>                             26,013
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    26,013
<EPS-PRIMARY>                                      .43
<EPS-DILUTED>                                      .39
<FN>
Earnings per share for the six months ended June 30, 1997 has been restated to
conform with the provisions of FAS No. 128, Earnings per share, adopted by the
Company in 1997.
</FN>