<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from consolidated
financial statements and is qualified in its entirety by reference to such
financial statements.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-END>                               JUN-30-1998
<CASH>                                          14,677
<SECURITIES>                                     1,950
<RECEIVABLES>                                   17,361
<ALLOWANCES>                                         0
<INVENTORY>                                      7,502
<CURRENT-ASSETS>                                43,622
<PP&E>                                          60,104
<DEPRECIATION>                                  10,797
<TOTAL-ASSETS>                                  92,929
<CURRENT-LIABILITIES>                            9,050
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           146
<OTHER-SE>                                      80,580
<TOTAL-LIABILITY-AND-EQUITY>                    92,929
<SALES>                                         46,381
<TOTAL-REVENUES>                                46,381
<CGS>                                           22,985
<TOTAL-COSTS>                                   22,985
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                 19,333
<INCOME-TAX>                                     7,359
<INCOME-CONTINUING>                             11,974
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    11,974
<EPS-PRIMARY>                                      .82
<EPS-DILUTED>                                      .81