<ARTICLE> 5
       
                                                  
<PERIOD-TYPE>                    12-MOS                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1996             DEC-31-1997
<PERIOD-END>                               DEC-31-1996             JUN-30-1997
<CASH>                                           1,361                     766
<SECURITIES>                                         0                       0
<RECEIVABLES>                                   25,514                  24,514
<ALLOWANCES>                                         0                       0
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<CURRENT-ASSETS>                                82,974                  81,695
<PP&E>                                          60,720                  62,903
<DEPRECIATION>                                 (29,336)                (31,228)
<TOTAL-ASSETS>                                 114,777                 113,823
<CURRENT-LIABILITIES>                           33,450                  28,818
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                           144                     144
<OTHER-SE>                                      50,738                  54,767
<TOTAL-LIABILITY-AND-EQUITY>                   114,777                 113,823
<SALES>                                        115,864                  68,669
<TOTAL-REVENUES>                               115,864                  68,669
<CGS>                                           77,863                  47,725
<TOTAL-COSTS>                                   99,865                  59,673
<OTHER-EXPENSES>                                     0                       0
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<INTEREST-EXPENSE>                               2,647                   1,400
<INCOME-PRETAX>                                 13,352                   7,596
<INCOME-TAX>                                     4,234                   2,483
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<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                     9,118                   5,113
<EPS-PRIMARY>                                      .63                     .36
<EPS-DILUTED>                                      .63                     .36
<FN>
</FN>