<ARTICLE> 5
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-START>                             JAN-01-1999
<PERIOD-END>                               SEP-30-1999
<CASH>                                          12,687
<SECURITIES>                                         0
<RECEIVABLES>                                  217,151
<ALLOWANCES>                                     4,843
<INVENTORY>                                      9,012
<CURRENT-ASSETS>                               298,747
<PP&E>                                         286,592
<DEPRECIATION>                                 125,591
<TOTAL-ASSETS>                               1,034,181
<CURRENT-LIABILITIES>                          164,395
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                             0
<OTHER-SE>                                     708,744
<TOTAL-LIABILITY-AND-EQUITY>                 1,034,181
<SALES>                                        593,388
<TOTAL-REVENUES>                               593,388
<CGS>                                          460,809
<TOTAL-COSTS>                                  527,775
<OTHER-EXPENSES>                                 1,006
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              10,790
<INCOME-PRETAX>                                 55,829
<INCOME-TAX>                                    28,436
<INCOME-CONTINUING>                             27,393
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    27,368
<EPS-BASIC>                                       0.92
<EPS-DILUTED>                                     0.85