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

  

<ARTICLE> 5
<MULTIPLIER> 1000
       
                                                                  
<PERIOD-TYPE>                   3-MOS               RESTATED         RESTATED
<FISCAL-YEAR-END>                DEC-31-1998      DEC-31-1997       DEC-31-1996
<PERIOD-END>                     MAR-31-1998      MAR-31-1997       MAR-31-1996
<CASH>                                68,367           62,345            49,869
<SECURITIES>                               0                0                0
<RECEIVABLES>                        366,759          337,441           271,811
<ALLOWANCES>                           4,295            4,831             4,719
<INVENTORY>                                0                0                 0
<CURRENT-ASSETS>                     438,305          401,586           321,308
<PP&E>                               124,543          114,485            99,662
<DEPRECIATION>                        60,912           54,626            45,726
<TOTAL-ASSETS>                       642,461          582,847           480,925
<CURRENT-LIABILITIES>                302,332          295,415           240,542
<BONDS>                               30,925           14,969            82,826
<COMMON>                                 348              342               279
<PREFERRED-MANDATORY>                      0                0                 0
<PREFERRED>                                0                0                 0
<OTHER-SE>                           334,300          283,057           166,092
<TOTAL-LIABILITY-AND-EQUITY>         642,461          582,847           480,925
<SALES>                                    0                0                 0
<TOTAL-REVENUES>                     372,376          351,155           294,787
<CGS>                                      0                0                 0
<TOTAL-COSTS>                        254,523          238,724           201,645
<OTHER-EXPENSES>                      67,126           64,126            52,662
<LOSS-PROVISION>                         403              360               290
<INTEREST-EXPENSE>                       324              383             1,509
<INCOME-PRETAX>                       15,568           13,773            10,077
<INCOME-TAX>                           5,838            5,234             3,930
<INCOME-CONTINUING>                    9,730            8,539             6,147
<DISCONTINUED>                             0                0                 0
<EXTRAORDINARY>                            0                0                 0
<CHANGES>                                  0                0                 0
<NET-INCOME>                           9,730            8,539             6,147
<EPS-PRIMARY>                            .28              .25               .22
<EPS-DILUTED>                            .28              .25               .21