
<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>


FINANCIAL DATA SCHEDULE

This schedule contains summary financial information extracted from Form 10-Q
financial statements filed for the period ending March 31, 1998 and is qualified
in its entirety by reference to such financial statements.

</LEGEND>
<MULTIPLIER>             1000
       

<S>                               <C> 

<PERIOD-TYPE>                           3-MOS
<FISCAL-YEAR-END>                 DEC-31-1998
<PERIOD-END>                      MAR-31-1998
<CASH>                                   2126
<SECURITIES>                            37475
<RECEIVABLES>                           31063     
<ALLOWANCES>                                0
<INVENTORY>                              1580
<CURRENT-ASSETS>                        81372
<PP&E>                                  38081
<DEPRECIATION>                          26952
<TOTAL-ASSETS>                         201289
<CURRENT-LIABILITIES>                   24592
<BONDS>                                     0
<COMMON>                                  728
<PREFERRED-MANDATORY>                       0
<PREFERRED>                                 0     
<OTHER-SE>                             174240
<TOTAL-LIABILITY-AND-EQUITY>           201289
<SALES>                                     0
<TOTAL-REVENUES>                        28201
<CGS>                                       0
<TOTAL-COSTS>                           20896
<OTHER-EXPENSES>                         5733
<LOSS-PROVISION>                            0
<INTEREST-EXPENSE>                         61
<INCOME-PRETAX>                          3856
<INCOME-TAX>                             1541
<INCOME-CONTINUING>                      2315
<DISCONTINUED>                             46 
<EXTRAORDINARY>                             0
<CHANGES>                                   0
<NET-INCOME>                             2361
<EPS-PRIMARY>                             .17
<EPS-DILUTED>                             .16


</TABLE>
