<ARTICLE>                     5
<LEGEND>
This schedule contains summary financial information extracted for the three
months ended September 30, 2000 and is qualified in its entirety by reference to
such financial statements.


                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-END>                               SEP-30-2000
<CASH>                                     103,264,000
<SECURITIES>                                29,746,000
<RECEIVABLES>                               34,149,000
<ALLOWANCES>                                         0
<INVENTORY>                                 17,709,000
<CURRENT-ASSETS>                           191,837,000
<PP&E>                                     179,158,000
<DEPRECIATION>                              77,665,000
<TOTAL-ASSETS>                             333,498,000
<CURRENT-LIABILITIES>                       22,386,000
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                       299,000
<OTHER-SE>                                 307,464,000
<TOTAL-LIABILITY-AND-EQUITY>               333,498,000
<SALES>                                     51,075,000
<TOTAL-REVENUES>                            51,075,000
<CGS>                                       24,810,000
<TOTAL-COSTS>                               24,810,000
<OTHER-EXPENSES>                            17,973,000
<LOSS-PROVISION>                              (15,000)
<INTEREST-EXPENSE>                         (2,756,000)
<INCOME-PRETAX>                             11,063,000
<INCOME-TAX>                                 3,986,000
<INCOME-CONTINUING>                          7,077,000
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                 7,077,000
<EPS-BASIC>                                       0.24
<EPS-DILUTED>                                     0.23