<ARTICLE>                                             5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM CONSOLIDATED
BALANCE SHEET AND CONSOLIDATED STATEMENT OF OPERATIONS AND RETAINED EARNINGS AND
IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER>  1000
       
                                                 

<PERIOD-TYPE>                                     3-MOS
<FISCAL-YEAR-END>                           DEC-31-1998
<PERIOD-END>                                MAR-31-1998
<CASH>                                            40944
<SECURITIES>                                          0
<RECEIVABLES>                                    197390
<ALLOWANCES>                                       7406
<INVENTORY>                                           0
<CURRENT-ASSETS>                                 378571
<PP&E>                                           315083
<DEPRECIATION>                                   170469
<TOTAL-ASSETS>                                   722309
<CURRENT-LIABILITIES>                            274199
<BONDS>                                           22091
<PREFERRED-MANDATORY>                                 0
<PREFERRED>                                           0
<COMMON>                                          17731
<OTHER-SE>                                       333721
<TOTAL-LIABILITY-AND-EQUITY>                     722309
<SALES>                                               0
<TOTAL-REVENUES>                                 293957
<CGS>                                                 0
<TOTAL-COSTS>                                    266051
<OTHER-EXPENSES>                                      0
<LOSS-PROVISION>                                      0
<INTEREST-EXPENSE>                                  417
<INCOME-PRETAX>                                   12420<F1>
<INCOME-TAX>                                       4807
<INCOME-CONTINUING>                                7613
<DISCONTINUED>                                        0
<EXTRAORDINARY>                                       0
<CHANGES>                                             0
<NET-INCOME>                                       7613
<EPS-PRIMARY>                                      0.59
<EPS-DILUTED>                                      0.59
<FN>
<F1>Includes General and Administrative Expenses of (16272) and interest income
of 1203 not reflected on this tag list.
</FN>