<ARTICLE> 5 <MULTIPLIER> 1,000 <PERIOD-TYPE> YEAR <FISCAL-YEAR-END> DEC-31-1999 <PERIOD-START> JAN-01-1999 <PERIOD-END> DEC-31-1999 <CASH> 3,609 <SECURITIES> 79,442 <RECEIVABLES> 61,035 <ALLOWANCES> 2,009 <INVENTORY> 13,755 <CURRENT-ASSETS> 94,070 <PP&E> 351,502 <DEPRECIATION> 115,875 <TOTAL-ASSETS> 678,512 <CURRENT-LIABILITIES> 60,111 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 10,688 <OTHER-SE> 231,107 <TOTAL-LIABILITY-AND-EQUITY> 678,512 <SALES> 291,737 <TOTAL-REVENUES> 296,498 <CGS> 174,468 <TOTAL-COSTS> 174,468 <OTHER-EXPENSES> 78,203 <LOSS-PROVISION> 2,333 <INTEREST-EXPENSE> 13,871 <INCOME-PRETAX> 27,623 <INCOME-TAX> 9,530 <INCOME-CONTINUING> 18,093 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 18,093 <EPS-BASIC> 2.12 <EPS-DILUTED> 2.11