<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED FINANCIAL STATEMENTS INCLUDED IN THE FORM 10-K AND IS QUALIFIED IN
ITS ENTIRETY TO REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<RESTATED>
<MULTIPLIER> 1,000
       
<S>                             <C>                     <C>
<PERIOD-TYPE>                   YEAR                    3-MOS
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-31-1997
<PERIOD-START>                             JAN-01-1997             OCT-01-1997
<PERIOD-END>                               DEC-31-1997             DEC-31-1997
<CASH>                                          82,408                  82,408
<SECURITIES>                                         0                       0
<RECEIVABLES>                                   52,960                  52,960
<ALLOWANCES>                                     1,040                   1,040
<INVENTORY>                                          0                       0
<CURRENT-ASSETS>                               139,243                 139,243
<PP&E>                                          10,080                  10,080
<DEPRECIATION>                                   1,772                   1,772
<TOTAL-ASSETS>                                 149,474                 149,474
<CURRENT-LIABILITIES>                           27,251                  27,251
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                           236                     236
<OTHER-SE>                                     120,277                 120,277
<TOTAL-LIABILITY-AND-EQUITY>                   149,474                 149,474
<SALES>                                        195,967                  60,146
<TOTAL-REVENUES>                               195,967                  60,146
<CGS>                                          135,149                  40,441
<TOTAL-COSTS>                                  169,957                  41,646
<OTHER-EXPENSES>                                   518                     130
<LOSS-PROVISION>                                   995                     549
<INTEREST-EXPENSE>                             (1,414)                   (380)
<INCOME-PRETAX>                                 26,010                   8,880
<INCOME-TAX>                                    10,404                   3,552
<INCOME-CONTINUING>                             15,606                   5,328
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                    15,606                   5,328
<EPS-PRIMARY>                                     0.72                    0.24
<EPS-DILUTED>                                     0.71                    0.24
        

</TABLE>