CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 29, 2012	Oct. 01, 2011	Sep. 29, 2012	Oct. 01, 2011
Income Statement [Abstract]
Net Sales	$ 317,593	$ 282,689	$ 548,644	$ 540,525
Costs and Expenses:
Cost of Product Sold	276,688	261,336	478,664	513,316
Selling and Administrative	16,245	15,409	31,073	31,513
Plant Restructuring	0	(15)	0	39
Other Operating Income	(274)	(18)	(292)	(169)
Total Costs and Expenses	292,659	276,712	509,445	544,699
Operating Income (Loss)	24,934	5,977	39,199	(4,174)
Interest Expense, Net	1,836	1,880	3,314	3,666
Earnings (Loss) Before Income Taxes	23,098	4,097	35,885	(7,840)
Income Taxes Expense (Benefit)	8,577	1,214	13,173	(2,748)
Net Earnings (Loss)	14,521	2,883	22,712	(5,092)
Earnings (Loss) Attributable to Common Stock	$ 14,010	$ 2,779	$ 21,920	$ (4,930)
Basic Earnings (Loss) per Common Share (Note 9)	$ 1.23	$ 0.24	$ 1.90	$ (0.42)
Diluted Earnings (Loss) per Common Share (Note 9)	$ 1.22	$ 0.24	$ 1.89	$ (0.42)