<ARTICLE> 5 <MULTIPLIER> 1,000 <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> DEC-31-2000 <PERIOD-START> JAN-01-2000 <PERIOD-END> MAR-31-2000 <CASH> 11,657 <SECURITIES> 4,374 <RECEIVABLES> 43,128 <ALLOWANCES> 4,870 <INVENTORY> 20,148 <CURRENT-ASSETS> 85,064 <PP&E> 241,943 <DEPRECIATION> 160,672 <TOTAL-ASSETS> 198,070 <CURRENT-LIABILITIES> 41,561 <BONDS> 902 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 2,824 <OTHER-SE> 147,907 <TOTAL-LIABILITY-AND-EQUITY> 198,070 <SALES> 0 <TOTAL-REVENUES> 73,768 <CGS> 31,884 <TOTAL-COSTS> 62,093 <OTHER-EXPENSES> 4,427 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> 14,441 <INCOME-TAX> 5,487 <INCOME-CONTINUING> 8,954 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 8,954 <EPS-BASIC> 0.32 <EPS-DILUTED> 0.32