<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM CONDENSED
CONSOLIDATED BALANCE SHEETS AND STATEMENTS OF EARNINGS AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-END>                               SEP-30-1998
<CASH>                                             712
<SECURITIES>                                    21,135
<RECEIVABLES>                                  103,136
<ALLOWANCES>                                       842
<INVENTORY>                                     14,332
<CURRENT-ASSETS>                               152,453
<PP&E>                                         469,268
<DEPRECIATION>                                 206,684
<TOTAL-ASSETS>                                 439,905
<CURRENT-LIABILITIES>                           77,555
<BONDS>                                        173,635
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         3,091
<OTHER-SE>                                     135,877
<TOTAL-LIABILITY-AND-EQUITY>                   439,905
<SALES>                                         49,701
<TOTAL-REVENUES>                               250,385
<CGS>                                           35,971
<TOTAL-COSTS>                                  161,730
<OTHER-EXPENSES>                                64,034
<LOSS-PROVISION>                                    68
<INTEREST-EXPENSE>                               9,235
<INCOME-PRETAX>                                  9,074
<INCOME-TAX>                                     3,930
<INCOME-CONTINUING>                              5,144
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     5,144
<EPS-PRIMARY>                                      .23
<EPS-DILUTED>                                      .23