<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                   3-MOS   
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-31-1997
<PERIOD-START>                             JAN-01-1997             JAN-01-1997
<PERIOD-END>                               MAR-31-1997             DEC-31-1997
<CASH>                                               0                  22,794
<SECURITIES>                                         0                  40,256
<RECEIVABLES>                                        0                 125,754 
<ALLOWANCES>                                         0                       0
<INVENTORY>                                          0                       0
<CURRENT-ASSETS>                                     0                 191,957
<PP&E>                                               0                  42,721
<DEPRECIATION>                                       0                  29,325
<TOTAL-ASSETS>                                       0                 258,720
<CURRENT-LIABILITIES>                                0                  42,751
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                             0                   7,020
<OTHER-SE>                                           0                 206,115
<TOTAL-LIABILITY-AND-EQUITY>                         0                 258,720
<SALES>                                        151,776                 151,776
<TOTAL-REVENUES>                                     0                       0
<CGS>                                                0                       0
<TOTAL-COSTS>                                  133,871                 133,871
<OTHER-EXPENSES>                                   224                     224
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                                  50                      50
<INCOME-PRETAX>                                 18,580                  18,580
<INCOME-TAX>                                     7,696                   7,696
<INCOME-CONTINUING>                                  0                       0
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                    10,884                  10,884
<EPS-PRIMARY>                                      .16                     .16
<EPS-DILUTED>                                      .15                     .15