<ARTICLE> 5 <MULTIPLIER> 1000 <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-2000 <PERIOD-START> JAN-01-2000 <PERIOD-END> JUN-30-2000 <CASH> 28,575 <SECURITIES> 3,996 <RECEIVABLES> 68,771 <ALLOWANCES> 1,523 <INVENTORY> 69,066 <CURRENT-ASSETS> 184,440 <PP&E> 347,562 <DEPRECIATION> 164,983 <TOTAL-ASSETS> 490,936 <CURRENT-LIABILITIES> 158,588 <BONDS> 50,549 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 46,661 <OTHER-SE> 183,861 <TOTAL-LIABILITY-AND-EQUITY> 490,936 <SALES> 391,495 <TOTAL-REVENUES> 391,495 <CGS> 217,176 <TOTAL-COSTS> 136,314 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 100 <INTEREST-EXPENSE> 2,854 <INCOME-PRETAX> 37,627 <INCOME-TAX> 13,358 <INCOME-CONTINUING> 24,107 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 24,107 <EPS-BASIC> 0.63 <EPS-DILUTED> 0.60