<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