<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM JUNE 30,
2000 QUARTERLY REPORT AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> JUN-30-2000
<CASH> 14,366
<SECURITIES> 11,012
<RECEIVABLES> 14,103
<ALLOWANCES> 323
<INVENTORY> 5,571
<CURRENT-ASSETS> 45,760
<PP&E> 188,212
<DEPRECIATION> 94,181
<TOTAL-ASSETS> 151,643
<CURRENT-LIABILITIES> 15,533
<BONDS> 43,148
0
0
<COMMON> 2,350
<OTHER-SE> 74,600
<TOTAL-LIABILITY-AND-EQUITY> 151,643
<SALES> 1,134
<TOTAL-REVENUES> 39,275
<CGS> 1,083
<TOTAL-COSTS> 31,285
<OTHER-EXPENSES> 0
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 1,333
<INCOME-PRETAX> 9,824
<INCOME-TAX> 4,112
<INCOME-CONTINUING> 5,712
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 5,712
<EPS-BASIC> .38
<EPS-DILUTED> .38
</TABLE>