<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM BALANCE
SHEET AND INCOME STATEMENT AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
                                                  
<PERIOD-TYPE>                   3-MOS                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1998             DEC-31-1998
<PERIOD-START>                             APR-01-1998             JAN-01-1998
<PERIOD-END>                               JUN-30-1998             DEC-31-1998
<CASH>                                               0                  29,564
<SECURITIES>                                         0                   5,748
<RECEIVABLES>                                        0                 231,238
<ALLOWANCES>                                         0                       0
<INVENTORY>                                          0                       0
<CURRENT-ASSETS>                                     0                 276,057
<PP&E>                                               0                  66,576
<DEPRECIATION>                                       0                  39,176
<TOTAL-ASSETS>                                       0                 391,835
<CURRENT-LIABILITIES>                                0                  86,316
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                             0                   7,146
<OTHER-SE>                                           0                 296,734
<TOTAL-LIABILITY-AND-EQUITY>                         0                 396,835
<SALES>                                        266,904                 496,960
<TOTAL-REVENUES>                                     0                       0
<CGS>                                                0                       0
<TOTAL-COSTS>                                  225,931                 418,662
<OTHER-EXPENSES>                                    57                     244
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                                (47)                       2
<INCOME-PRETAX>                                 42,402                  80,702
<INCOME-TAX>                                    19,702                  35,218
<INCOME-CONTINUING>                                  0                       0
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                    22,700                  45,484
<EPS-PRIMARY>                                      .32                     .64 
<EPS-DILUTED>                                      .31                     .63