<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from Item 1 of
Form 10-K for the period ended December 31, 1997 and is qualified in its
entirety by reference to such 10-K
</LEGEND>
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
       
                             
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-END>                               DEC-31-1998
<EXCHANGE-RATE>                                      1
<CASH>                                          50,048
<SECURITIES>                                    61,185
<RECEIVABLES>                                   14,752
<ALLOWANCES>                                       434
<INVENTORY>                                          0
<CURRENT-ASSETS>                               131,364
<PP&E>                                          90,477
<DEPRECIATION>                                  36,048
<TOTAL-ASSETS>                                 230,290
<CURRENT-LIABILITIES>                           49,927
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                            28
<OTHER-SE>                                     179,539
<TOTAL-LIABILITY-AND-EQUITY>                   230,290
<SALES>                                              0
<TOTAL-REVENUES>                               134,811
<CGS>                                                0
<TOTAL-COSTS>                                        0
<OTHER-EXPENSES>                               109,341
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 150
<INCOME-PRETAX>                                  5,824
<INCOME-TAX>                                     2,352
<INCOME-CONTINUING>                                  0
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     3,472
<EPS-PRIMARY>                                     0.13
<EPS-DILUTED>                                     0.12