
<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 ended June 30, 1998 and is qualified
in its entirety by reference to such financial statements.

</LEGEND>
<MULTIPLIER>  1,000
       

<S>                               <C>

<PERIOD-TYPE>                           6-MOS
<FISCAL-YEAR-END>                 DEC-31-1998
<PERIOD-END>                      JUN-30-1998
<CASH>                                  12908
<SECURITIES>                            45518
<RECEIVABLES>                           34380
<ALLOWANCES>                                0
<INVENTORY>                              2278
<CURRENT-ASSETS>                       106837
<PP&E>                                  39661
<DEPRECIATION>                         (27983)
<TOTAL-ASSETS>                         204851
<CURRENT-LIABILITIES>                   23645
<BONDS>                                     0
<COMMON>                                  719
<PREFERRED-MANDATORY>                       0
<PREFERRED>                                 0
<OTHER-SE>                             178412
<TOTAL-LIABILITY-AND-EQUITY>           204851
<SALES>                                     0
<TOTAL-REVENUES>                        59369
<CGS>                                       0
<TOTAL-COSTS>                           42427
<OTHER-EXPENSES>                        11750
<LOSS-PROVISION>                            0
<INTEREST-EXPENSE>                          0
<INCOME-PRETAX>                          9416
<INCOME-TAX>                             3773
<INCOME-CONTINUING>                      5643
<DISCONTINUED>                            984 
<EXTRAORDINARY>                             0
<CHANGES>                                   0
<NET-INCOME>                             6627
<EPS-PRIMARY>                             .47
<EPS-DILUTED>                             .46
 

</TABLE>
