
<TABLE> <S> <C>


<ARTICLE>                     5
       
<S>                                <C>              <C>              <C>              <C>              <C>
<RESTATED>
<PERIOD-TYPE>                      12-MOS           3-MOS            6-MOS            9-MOS            12-MOS
<FISCAL-YEAR-END>                  DEC-31-1996      DEC-31-1996      DEC-31-1996      DEC-31-1996      DEC-31-1995
<PERIOD-END>                       DEC-31-1996      MAR-31-1996      JUN-30-1996      SEP-30-1996      DEC-31-1995
<CASH>                                  27,300           14,300           15,000           22,100           17,400
<SECURITIES>                                 0                0                0                0                0
<RECEIVABLES>                           69,300           69,800           72,200           68,700           67,900
<ALLOWANCES>                                 0                0                0                0                0
<INVENTORY>                             44,000           50,400           49,200           45,100           48,300
<CURRENT-ASSETS>                       156,700           16,900           12,700           11,800          148,400
<PP&E>                                 431,600          426,900          429,800          434,900          440,100
<DEPRECIATION>                         221,300          215,400          218,600          233,700          210,800
<TOTAL-ASSETS>                         477,400          469,700          467,400          468,000          480,100
<CURRENT-LIABILITIES>                   65,600           73,800           67,800           74,700           61,800
<BONDS>                                 98,400           97,900          106,900           95,000          114,300
<PREFERRED-MANDATORY>                        0                0              200                0                0
<PREFERRED>                                  0                0                0                0                0
<COMMON>                                 4,200            4,200            4,200            4,200            4,200
<OTHER-SE>                             247,800          237,700          233,500          239,600          249,900
<TOTAL-LIABILITY-AND-EQUITY>           477,400          469,700          467,400          468,000          480,100
<SALES>                                458,800          113,900          232,900          344,200          412,900
<TOTAL-REVENUES>                       458,800          113,900          232,900          344,200          412,900
<CGS>                                  332,700           82,600          169,700          251,400          294,700
<TOTAL-COSTS>                          332,700           82,600          169,700          251,400          294,700
<OTHER-EXPENSES>                        20,600           21,400           21,300           21,100           (1,500)
<LOSS-PROVISION>                             0                0                0                0                0
<INTEREST-EXPENSE>                       6,900            1,600            3,400            5,400            7,300
<INCOME-PRETAX>                         25,800          (10,800)           1,300           11,000           42,500
<INCOME-TAX>                            10,800           (2,400)           2,200            5,900           13,900
<INCOME-CONTINUING>                     16,400           (8,200)            (100)           6,500           28,700
<DISCONTINUED>                               0                0                0                0                0
<EXTRAORDINARY>                              0                0                0                0                0
<CHANGES>                                    0                0                0                0                0
<NET-INCOME>                            16,400           (8,200)            (100)           6,500           28,700
<EPS-PRIMARY>                             1.00             (.49)             .00              .40             1.73
<EPS-DILUTED>                              .99             (.49)              .0              .40             1.71
        


</TABLE>
