<ARTICLE> 5
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             APR-01-1998
<PERIOD-END>                               JUN-30-1998
<CASH>                                          15,076
<SECURITIES>                                     6,134
<RECEIVABLES>                                   41,491
<ALLOWANCES>                                     7,492
<INVENTORY>                                     17,735
<CURRENT-ASSETS>                                84,085
<PP&E>                                         207,992
<DEPRECIATION>                                 146,208
<TOTAL-ASSETS>                                 190,702
<CURRENT-LIABILITIES>                           39,386
<BONDS>                                            911
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         2,941
<OTHER-SE>                                     143,562
<TOTAL-LIABILITY-AND-EQUITY>                   190,702
<SALES>                                              0
<TOTAL-REVENUES>                                66,375
<CGS>                                           24,710
<TOTAL-COSTS>                                   52,846
<OTHER-EXPENSES>                                 3,745
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                 10,338
<INCOME-TAX>                                     3,928
<INCOME-CONTINUING>                              6,410
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     6,410
<EPS-PRIMARY>                                     0.22
<EPS-DILUTED>                                     0.22