<ARTICLE> 5
<RESTATED> 
<MULTIPLIER> 1,000
       
                                 
<PERIOD-TYPE>                       YEAR
<FISCAL-YEAR-END>                   DEC-31-1996
<PERIOD-START>                      JAN-01-1996
<PERIOD-END>                        DEC-31-1996
<CASH>                                    5,116
<SECURITIES>                            121,545
<RECEIVABLES>                            46,027
<ALLOWANCES>                              1,418
<INVENTORY>                              13,199
<CURRENT-ASSETS>                         76,166
<PP&E>                                  225,908
<DEPRECIATION>                           91,487
<TOTAL-ASSETS>                          394,149
<CURRENT-LIABILITIES>                    33,895
<BONDS>                                  65,713
<PREFERRED-MANDATORY>                         0
<PREFERRED>                                   0
<COMMON>                                 10,663
<OTHER-SE>                              221,466
<TOTAL-LIABILITY-AND-EQUITY>            394,149
<SALES>                                 261,220
<TOTAL-REVENUES>                        265,220
<CGS>                                   170,016
<TOTAL-COSTS>                           170,016
<OTHER-EXPENSES>                         48,550
<LOSS-PROVISION>                          1,522
<INTEREST-EXPENSE>                        5,671
<INCOME-PRETAX>                          39,461
<INCOME-TAX>                             13,375
<INCOME-CONTINUING>                      26,086
<DISCONTINUED>                                0
<EXTRAORDINARY>                               0
<CHANGES>                                     0
<NET-INCOME>                             26,086
<EPS-PRIMARY>                              3.06<F1>
<EPS-DILUTED>                              3.05<F1>
<FN>
<F1>Per share amounts are restated to reflect 2-for-1 stock split effective March
6, 1998 and adoption of FAS128 effective fourth quarter 1997.
</FN>