<ARTICLE> 5
<LEGEND>
THE FINANCIAL DATA SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED
FROM CONSOLIDATED FINANCIAL STATEMENTS FOR THE QUARTERLY PERIOD ENDED SEPTEMBER
30, 1999.
</LEGEND>
<MULTIPLIER> 1,000

     
<PERIOD-TYPE>                                       9-MOS
<FISCAL-YEAR-END>                             MAR-31-2000
<PERIOD-END>                                  DEC-31-1999
<CASH>                                              7,978
<SECURITIES>                                            0
<RECEIVABLES>                                     113,799
<ALLOWANCES>                                      (5,348)
<INVENTORY>                                        29,690
<CURRENT-ASSETS>                                  151,272
<PP&E>                                            375,333
<DEPRECIATION>                                   (58,690)
<TOTAL-ASSETS>                                    667,970
<CURRENT-LIABILITIES>                              99,837
<BONDS>                                                 0
<PREFERRED-MANDATORY>                                   0
<PREFERRED>                                             0
<COMMON>                                              152
<OTHER-SE>                                        286,353
<TOTAL-LIABILITY-AND-EQUITY>                      667,970
<SALES>                                           457,123
<TOTAL-REVENUES>                                  457,123
<CGS>                                             317,641
<TOTAL-COSTS>                                     317,641
<OTHER-EXPENSES>                                   79,794
<LOSS-PROVISION>                                        0
<INTEREST-EXPENSE>                                  9,168
<INCOME-PRETAX>                                    50,520
<INCOME-TAX>                                       20,208
<INCOME-CONTINUING>                                30,312
<DISCONTINUED>                                          0
<EXTRAORDINARY>                                         0
<CHANGES>                                               0
<NET-INCOME>                                       30,312
<EPS-BASIC>                                          1.96
<EPS-DILUTED>                                        1.93