
<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, 1996 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-31-1996
<PERIOD-END>                      MAR-31-1996
<CASH>                                  21121
<SECURITIES>                            16026
<RECEIVABLES>                           30625
<ALLOWANCES>                                0
<INVENTORY>                              9626
<CURRENT-ASSETS>                        84006
<PP&E>                                  60328
<DEPRECIATION>                          43638
<TOTAL-ASSETS>                         165338
<CURRENT-LIABILITIES>                   24038
<BONDS>                                   195
<COMMON>                                  646
<PREFERRED-MANDATORY>                       0
<PREFERRED>                                 0
<OTHER-SE>                             136639
<TOTAL-LIABILITY-AND-EQUITY>           165338
<SALES>                                     0
<TOTAL-REVENUES>                        37646
<CGS>                                       0
<TOTAL-COSTS>                           26946
<OTHER-EXPENSES>                         6216
<LOSS-PROVISION>                            0
<INTEREST-EXPENSE>                          0
<INCOME-PRETAX>                          5214
<INCOME-TAX>                             2106
<INCOME-CONTINUING>                      3108
<DISCONTINUED>                              0
<EXTRAORDINARY>                             0
<CHANGES>                                   0
<NET-INCOME>                             3108
<EPS-PRIMARY>                             .47
<EPS-DILUTED>                               0
        


</TABLE>
