<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>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-END>                               MAR-31-2000
<CASH>                                           5,523
<SECURITIES>                                    10,957
<RECEIVABLES>                                   84,709
<ALLOWANCES>                                       664
<INVENTORY>                                     12,216
<CURRENT-ASSETS>                               124,902
<PP&E>                                         694,784
<DEPRECIATION>                                 242,123
<TOTAL-ASSETS>                                 755,207
<CURRENT-LIABILITIES>                          100,340
<BONDS>                                        305,188
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         3,091
<OTHER-SE>                                     243,076
<TOTAL-LIABILITY-AND-EQUITY>                   755,207
<SALES>                                         14,551
<TOTAL-REVENUES>                               126,456
<CGS>                                           11,190
<TOTAL-COSTS>                                   81,533
<OTHER-EXPENSES>                                29,507
<LOSS-PROVISION>                                     1
<INTEREST-EXPENSE>                               5,863
<INCOME-PRETAX>                                 10,283
<INCOME-TAX>                                     4,216
<INCOME-CONTINUING>                              6,067
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     6,067
<EPS-BASIC>                                        .25
<EPS-DILUTED>                                      .25