<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM SEPTEMBER
30, 2000 QUARTERLY REPORT AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 9-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> SEP-30-2000
<CASH> 16,714
<SECURITIES> 9,265
<RECEIVABLES> 13,207
<ALLOWANCES> 340
<INVENTORY> 4,395
<CURRENT-ASSETS> 44,719
<PP&E> 200,216
<DEPRECIATION> 96,521
<TOTAL-ASSETS> 161,150
<CURRENT-LIABILITIES> 16,425
<BONDS> 45,380
0
0
<COMMON> 2,350
<OTHER-SE> 73,258
<TOTAL-LIABILITY-AND-EQUITY> 161,150
<SALES> 2,093
<TOTAL-REVENUES> 59,209
<CGS> 1,549
<TOTAL-COSTS> 48,756
<OTHER-EXPENSES> 0
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 2,245
<INCOME-PRETAX> 11,902
<INCOME-TAX> 5,032
<INCOME-CONTINUING> 6,870
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 6,870
<EPS-BASIC> .46
<EPS-DILUTED> .46
</TABLE>