WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

  

<ARTICLE>                     5
<CIK>                       0000904020
<MULTIPLIER>                                   1,000
<CURRENCY>                                     U.S. Dollars
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                              DEC-31-1998
<PERIOD-START>                                 JAN-01-1998
<PERIOD-END>                                   MAR-31-1998
<EXCHANGE-RATE>                                1.000
<CASH>                                         41,802
<SECURITIES>                                      930
<RECEIVABLES>                                  26,466
<ALLOWANCES>                                        0
<INVENTORY>                                     2,738
<CURRENT-ASSETS>                               79,822
<PP&E>                                         44,374
<DEPRECIATION>                                      0
<TOTAL-ASSETS>                                155,898
<CURRENT-LIABILITIES>                          35,627
<BONDS>                                        69,877
<PREFERRED-MANDATORY>                               0
<PREFERRED>                                         0
<COMMON>                                       29,721
<OTHER-SE>                                     14,385
<TOTAL-LIABILITY-AND-EQUITY>                  155,898
<SALES>                                        58,055
<TOTAL-REVENUES>                               58,055
<CGS>                                               0
<TOTAL-COSTS>                                  52,180
<OTHER-EXPENSES>                                 (469)
<LOSS-PROVISION>                                    0
<INTEREST-EXPENSE>                              1,201
<INCOME-PRETAX>                                 5,143
<INCOME-TAX>                                    2,160
<INCOME-CONTINUING>                             2,983
<DISCONTINUED>                                      0
<EXTRAORDINARY>                                     0
<CHANGES>                                           0
<NET-INCOME>                                    2,983
<EPS-BASIC 1997>                                 0.08
<EPS-DILUTED 1997>                               0.08
<EPS-BASIC 1998>                                 0.39
<EPS-DILUTED 1998>                               0.32