<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> 6-MOS <FISCAL-YEAR-END> DEC-31-1998 <PERIOD-END> JUN-30-1998 <CASH> 1,079 <SECURITIES> 22,765 <RECEIVABLES> 67,745 <ALLOWANCES> 993 <INVENTORY> 17,539 <CURRENT-ASSETS> 113,403 <PP&E> 485,242 <DEPRECIATION> 210,249 <TOTAL-ASSETS> 460,726 <CURRENT-LIABILITIES> 77,302 <BONDS> 169,718 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 3,091 <OTHER-SE> 152,971 <TOTAL-LIABILITY-AND-EQUITY> 460,726 <SALES> 33,712 <TOTAL-REVENUES> 167,632 <CGS> 24,938 <TOTAL-COSTS> 108,675 <OTHER-EXPENSES> 36,924 <LOSS-PROVISION> 47 <INTEREST-EXPENSE> 5,999 <INCOME-PRETAX> 18,806 <INCOME-TAX> 7,091 <INCOME-CONTINUING> 11,715 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 11,715 <EPS-PRIMARY> .52 <EPS-DILUTED> .51