<ARTICLE> 5 <MULTIPLIER> 1,000 <CURRENCY> DOLLAR (OR US DOLLAR) <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> MAR-31-1998 <PERIOD-START> APR-01-1997 <PERIOD-END> JUN-30-1997 <EXCHANGE-RATE> 1,000 <CASH> 37,391 <SECURITIES> 8,965 <RECEIVABLES> 41,351 <ALLOWANCES> (1,070) <INVENTORY> 16,734 <CURRENT-ASSETS> 110,994 <PP&E> 346,539 <DEPRECIATION> (59,536) <TOTAL-ASSETS> 406,252 <CURRENT-LIABILITIES> 49,481 <BONDS> 230,000 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 93,202 <OTHER-SE> 18,656 <TOTAL-LIABILITY-AND-EQUITY> 406,252 <SALES> 76,837 <TOTAL-REVENUES> 76,837 <CGS> 47,476 <TOTAL-COSTS> 47,476 <OTHER-EXPENSES> 5,720 <LOSS-PROVISION> 15 <INTEREST-EXPENSE> 1,685 <INCOME-PRETAX> 21,956 <INCOME-TAX> 6,587 <INCOME-CONTINUING> 15,369 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 15,369 <EPS-PRIMARY> .35 <EPS-DILUTED> .31