<ARTICLE>                     5
<MULTIPLIER>   1,000
       
                                                                                               
<PERIOD-TYPE>                 3-MOS                         3-MOS
<FISCAL-YEAR-END>                    DEC-31-1997                  DEC-31-1996
<PERIOD-START>                       JAN-01-1997                  JAN-01-1996              
<PERIOD-END>                         MAR-31-1997                   MAR-31-1996
<CASH>                                     7,408                        19,402
<SECURITIES>                              83,441                        56,927
<RECEIVABLES>                             41,619                        34,140
<ALLOWANCES>                                (850)                         (554)
<INVENTORY>                                    0                             0
<CURRENT-ASSETS>                         140,254                       113,746
<PP&E>                                    38,437                        31,991
<DEPRECIATION>                            19,373                        15,724
<TOTAL-ASSETS>                           161,791                       130,809
<CURRENT-LIABILITIES>                     25,958                        19,911
<BONDS>                                    2,600                         2,907
<PREFERRED-MANDATORY>                          0                             0
<PREFERRED>                                    0                             0
<COMMON>                                     210                           205
<OTHER-SE>                               130,816                       106,491
<TOTAL-LIABILITY-AND-EQUITY>             161,791                       130,809
<SALES>                                    7,285                         8,137
<TOTAL-REVENUES>                          45,058                        37,345
<CGS>                                      5,563                         6,612
<TOTAL-COSTS>                             40,372                        32,668
<OTHER-EXPENSES>                               0                             0
<LOSS-PROVISION>                             165                            25
<INTEREST-EXPENSE>                            17                            34
<INCOME-PRETAX>                            5,666                         5,587
<INCOME-TAX>                               2,266                         2,234
<INCOME-CONTINUING>                        3,400                         3,353
<DISCONTINUED>                                 0                             0
<EXTRAORDINARY>                                0                             0
<CHANGES>                                      0                             0
<NET-INCOME>                               3,400                         3,353
<EPS-PRIMARY>                                .16                           .16
<EPS-DILUTED>                                .16                           .16