<ARTICLE> 5 <MULTIPLIER> 1,000 <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> DEC-31-2000 <PERIOD-START> JAN-01-2000 <PERIOD-END> MAR-31-2000 <CASH> 26,949 <SECURITIES> 23,115 <RECEIVABLES> 130,045 <ALLOWANCES> 5,509 <INVENTORY> 11,884 <CURRENT-ASSETS> 277,673 <PP&E> 646,050 <DEPRECIATION> 358,793 <TOTAL-ASSETS> 964,516 <CURRENT-LIABILITIES> 355,758 <BONDS> 114,011 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 72,219 <OTHER-SE> 367,700 <TOTAL-LIABILITY-AND-EQUITY> 964,516 <SALES> 404,426 <TOTAL-REVENUES> 404,426 <CGS> 171,684 <TOTAL-COSTS> 331,619 <OTHER-EXPENSES> (1,773) <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 3,681 <INCOME-PRETAX> 70,899 <INCOME-TAX> 26,577 <INCOME-CONTINUING> 44,322 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 44,322 <EPS-BASIC> .61 <EPS-DILUTED> .61