<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
FINANCIAL STATEMENTS CONTAINED IN THE BODY OF THE ACCOMPANYING FORM 10-Q AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-END>                               MAR-31-1998
<CASH>                                           5,233
<SECURITIES>                                     1,829
<RECEIVABLES>                                   12,531
<ALLOWANCES>                                       617
<INVENTORY>                                        479
<CURRENT-ASSETS>                                23,232
<PP&E>                                          76,690
<DEPRECIATION>                                  37,005
<TOTAL-ASSETS>                                  63,308
<CURRENT-LIABILITIES>                           11,325
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        12,101
<OTHER-SE>                                           0
<TOTAL-LIABILITY-AND-EQUITY>                    63,308
<SALES>                                         25,588
<TOTAL-REVENUES>                                25,588
<CGS>                                                0
<TOTAL-COSTS>                                        0
<OTHER-EXPENSES>                                24,123
<LOSS-PROVISION>                                     3
<INTEREST-EXPENSE>                                  75
<INCOME-PRETAX>                                  1,438
<INCOME-TAX>                                       549
<INCOME-CONTINUING>                                889
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                       889
<EPS-PRIMARY>                                      .13
<EPS-DILUTED>                                      .13