<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                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-31-1997
<PERIOD-START>                             JUL-01-1997             JAN-01-1997
<PERIOD-END>                               SEP-30-1997             DEC-01-1997
<CASH>                                               0                  20,254
<SECURITIES>                                         0                  48,294
<RECEIVABLES>                                        0                 154,277
<ALLOWANCES>                                         0                       0
<INVENTORY>                                          0                       0
<CURRENT-ASSETS>                                     0                 230,491
<PP&E>                                               0                  51,518
<DEPRECIATION>                                       0                  31,649
<TOTAL-ASSETS>                                       0                 298,385
<CURRENT-LIABILITIES>                                0                  55,966
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                             0                   7,052
<OTHER-SE>                                           0                 233,682
<TOTAL-LIABILITY-AND-EQUITY>                         0                 298,385
<SALES>                                        182,140                 497,217
<TOTAL-REVENUES>                                     0                       0
<CGS>                                                0                       0
<TOTAL-COSTS>                                  160,107                 436,647
<OTHER-EXPENSES>                                    82                     732
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                                  51                     151
<INCOME-PRETAX>                                 23,106                  62,778
<INCOME-TAX>                                     9,545                  25,962
<INCOME-CONTINUING>                                  0                       0
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                    13,561                  36,816
<EPS-PRIMARY>                                      .19                     .53
<EPS-DILUTED>                                      .19                     .51