CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Jun. 30, 2012	Jul. 02, 2011
Income Statement [Abstract]
Net Sales	$ 231,051	$ 257,836
Costs and Expenses:
Cost of Product Sold	201,976	251,980
Selling and Administrative	14,828	16,104
Plant Restructuring	0	54
Other Operating Income	(18)	(151)
Total Costs and Expenses	216,786	267,987
Operating Income (Loss)	14,265	(10,151)
Interest Expense, Net	1,478	1,786
Earnings (Loss) Before Income Taxes	12,787	(11,937)
Income Taxes Expense (Benefit)	4,596	(3,962)
Net Earnings (Loss)	8,191	(7,975)
Earnings (Loss) Attributable to Common Stock	$ 7,907	$ (7,708)
Basic Earnings (Loss) per Common Share (Note 9)	$ 0.68	$ (0.66)
Diluted Earnings (Loss) per Common Share (Note 9)	$ 0.67	$ (0.66)