
<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM FORM 10-K
FINANCIAL STATEMENTS FILED FOR THE PERIOD ENDING DECEMBER 31, 1997 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               DEC-31-1997
<CASH>                                           6,464
<SECURITIES>                                    25,084
<RECEIVABLES>                                   26,633
<ALLOWANCES>                                         0
<INVENTORY>                                      1,585
<CURRENT-ASSETS>                                67,666
<PP&E>                                          39,268
<DEPRECIATION>                                  28,084
<TOTAL-ASSETS>                                 202,110
<CURRENT-LIABILITIES>                           32,815
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           719
<OTHER-SE>                                     166,709
<TOTAL-LIABILITY-AND-EQUITY>                   202,110
<SALES>                                              0
<TOTAL-REVENUES>                               107,487
<CGS>                                                0
<TOTAL-COSTS>                                   77,828
<OTHER-EXPENSES>                                27,142
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 296
<INCOME-PRETAX>                                  7,044
<INCOME-TAX>                                   (4,478)
<INCOME-CONTINUING>                              2,566
<DISCONTINUED>                                  17,684
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    20,250
<EPS-PRIMARY>                                     2.90
<EPS-DILUTED>                                     2.85
        

</TABLE>
