
<TABLE> <S> <C>

<ARTICLE>                              5
<MULTIPLIER>                           1,000
<CURRENCY>                             U. S. Dollars
       
<S>                                                      <C>
<PERIOD-TYPE>                                                    6-MOS
<FISCAL-YEAR-END>                                          DEC-31-1998
<PERIOD-START>                                             JAN-01-1998
<PERIOD-END>                                               JUN-30-1998
<EXCHANGE-RATE>                                                      1
<CASH>                                                           3,078
<SECURITIES>                                                         0
<RECEIVABLES>                                                   27,797
<ALLOWANCES>                                                     1,008
<INVENTORY>                                                     21,902
<CURRENT-ASSETS>                                                72,793
<PP&E>                                                         156,385
<DEPRECIATION>                                                  94,685
<TOTAL-ASSETS>                                                 157,990
<CURRENT-LIABILITIES>                                           30,886
<BONDS>                                                         32,959
<PREFERRED-MANDATORY>                                                0
<PREFERRED>                                                         19
<COMMON>                                                           114
<OTHER-SE>                                                      86,316
<TOTAL-LIABILITY-AND-EQUITY>                                   157,990
<SALES>                                                         26,563
<TOTAL-REVENUES>                                                98,764
<CGS>                                                           17,496
<TOTAL-COSTS>                                                   62,574
<OTHER-EXPENSES>                                                     0
<LOSS-PROVISION>                                                    21
<INTEREST-EXPENSE>                                               1,552
<INCOME-PRETAX>                                                  3,246
<INCOME-TAX>                                                     1,333
<INCOME-CONTINUING>                                              1,913
<DISCONTINUED>                                                       0
<EXTRAORDINARY>                                                      0
<CHANGES>                                                            0
<NET-INCOME>                                                     1,913
<EPS-PRIMARY>                                                        0.18
<EPS-DILUTED>                                                        0.18
        


</TABLE>
