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

<TABLE> <S> <C>

<PAGE>
<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
       
<S>                             <C>                     <C>
<PERIOD-TYPE>                   3-MOS                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-31-1997
<PERIOD-START>                             OCT-01-1997             JAN-01-1997
<PERIOD-END>                               DEC-31-1997             DEC-31-1997
<CASH>                                               0                  40,276
<SECURITIES>                                         0                   6,607
<RECEIVABLES>                                        0                 159,962
<ALLOWANCES>                                         0                       0
<INVENTORY>                                          0                       0
<CURRENT-ASSETS>                                     0                 217,574
<PP&E>                                               0                  57,104
<DEPRECIATION>                                       0                  33,491
<TOTAL-ASSETS>                                       0                 329,176
<CURRENT-LIABILITIES>                                0                  70,395
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                             0                   7,065
<OTHER-SE>                                           0                 249,972
<TOTAL-LIABILITY-AND-EQUITY>                         0                 329,176
<SALES>                                        209,584                 706,801
<TOTAL-REVENUES>                                     0                       0
<CGS>                                                0                       0
<TOTAL-COSTS>                                  184,981                 621,638
<OTHER-EXPENSES>                                   398                   1,130
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                                  21                     162
<INCOME-PRETAX>                                 25,305                  88,084
<INCOME-TAX>                                    10,750                  36,712
<INCOME-CONTINUING>                                  0                       0
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                    14,555                  51,371
<EPS-PRIMARY>                                      .21                     .73
<EPS-DILUTED>                                      .20                     .72
        

</TABLE>