<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from the 
registrant's unaudited financial statements contained in its report on
Form 10-Q for the quarterly period ended June 30, 1998 and is qualified
in its entirety by reference to such financial statements.
</LEGEND>
<RESTATED> 
<MULTIPLIER> 1,000
<CURRENCY> USD
       
                                                  
<PERIOD-TYPE>                   6-MOS                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1998             DEC-31-1997
<PERIOD-START>                             JAN-01-1998             JAN-01-1997
<PERIOD-END>                               JUN-30-1998             JUN-30-1997
<EXCHANGE-RATE>                                    1.0                     1.0
<CASH>                                          40,756                   6,987
<SECURITIES>                                   124,385                  70,108
<RECEIVABLES>                                   55,429                  72,424
<ALLOWANCES>                                     7,513                   4,357
<INVENTORY>                                     16,252                  15,952
<CURRENT-ASSETS>                               268,952                 174,532
<PP&E>                                          75,957                  73,805
<DEPRECIATION>                                  39,994                  36,083
<TOTAL-ASSETS>                                 396,578                 288,878
<CURRENT-LIABILITIES>                          134,427                  75,978
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                        32,630                  33,708
<OTHER-SE>                                      94,728                 140,565
<TOTAL-LIABILITY-AND-EQUITY>                   396,578                 288,878
<SALES>                                              0                       0
<TOTAL-REVENUES>                               278,015                 281,322
<CGS>                                                0                       0
<TOTAL-COSTS>                                  163,632                 160,872
<OTHER-EXPENSES>                               106,079                 102,202
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                                   0                       0
<INCOME-PRETAX>                                  8,304                  18,248
<INCOME-TAX>                                     3,155                   6,934
<INCOME-CONTINUING>                              5,149                  11,314
<DISCONTINUED>                                       0                     149
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                     5,149                  11,463
<EPS-PRIMARY>                                     0.16                    0.34
<EPS-DILUTED>                                     0.16                    0.34