<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<RESTATED> 
<MULTIPLIER> 1,000
       
<S>                             <C>                     <C>                     <C>                     <C>
<PERIOD-TYPE>                   YEAR                   3-MOS                   6-MOS                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1995             DEC-31-1996             DEC-31-1996             DEC-31-1996
<PERIOD-START>                             JAN-01-1995             JAN-01-1996             JAN-01-1996             JAN-01-1996
<PERIOD-END>                               DEC-31-1995             MAR-31-1996             JUN-30-1996             SEP-30-1996
<CASH>                                           9,214                  11,823                  15,332                  13,984
<SECURITIES>                                     5,000                       0                       0                       0
<RECEIVABLES>                                   53,516                  55,377                  53,329                  56,043
<ALLOWANCES>                                       394                       0<F1>                   0<F1>                   0<F1>
<INVENTORY>                                     12,541                  12,327                  16,004                  14,636
<CURRENT-ASSETS>                                90,683                  88,176                  97,297                  96,534
<PP&E>                                          60,426                  64,062                  69,542                  65,961
<DEPRECIATION>                                  30,126                  32,939                  37,334                  34,662
<TOTAL-ASSETS>                                 138,156                 136,731                 165,175                 164,400
<CURRENT-LIABILITIES>                           59,613                  56,961                  64,983                  66,645
<BONDS>                                          6,874                   8,553                   8,725                   7,957
<PREFERRED-MANDATORY>                                0                       0                       0                       0
<PREFERRED>                                        695                     695                   3,695                   3,695
<COMMON>                                           243                     244                     264                     264
<OTHER-SE>                                      61,395                  60,264                  76,923                  75,471
<TOTAL-LIABILITY-AND-EQUITY>                   138,156                 136,731                 165,175                 164,400
<SALES>                                        187,553                  41,867                  83,583                 130,919
<TOTAL-REVENUES>                               187,722                  41,896                  83,674                 131,073
<CGS>                                          141,845                  32,535                  63,670                 101,240
<TOTAL-COSTS>                                  141,845                  32,535                  63,670                 101,240
<OTHER-EXPENSES>                                41,199                   7,370                  14,797                  23,666
<LOSS-PROVISION>                                   193                       0<F1>                       0<F1>
                       0<F1>
<INTEREST-EXPENSE>                             (1,899)                     647                   1,559                   2,463
<INCOME-PRETAX>                                  3,171                   1,475                   3,936                   4,178
<INCOME-TAX>                                       997                     483                   1,353                   1,348
<INCOME-CONTINUING>                              2,174                     992                   2,583                   2,830
<DISCONTINUED>                                 (9,648)                 (2,454)                     787                 (1,228)
<EXTRAORDINARY>                                      0                       0                       0                       0
<CHANGES>                                            0                       0                       0                       0
<NET-INCOME>                                   (7,474)                 (1,462)                   3,370                   1,602
<EPS-PRIMARY>                                    (.36)<F2>                   (.07)<F2>                     .13<F2>
                     .04<F2>
<EPS-DILUTED>                                    (.36)<F3>                   (.07)<F3>                     .12<F3>
                     .04<F3>
<FN>
<F1>Due to the use of condensed financial statements for interim reporting, this
information is not compiled on a quarterly basis.
<F2>Basic EPS in accordance with SFAS No. 128.
<F3>Diluted EPS in accordance with SFAS No. 128.
</FN>
        

</TABLE>