CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Dec. 29, 2012	Dec. 31, 2011
Income Statement [Abstract]
Net Sales	$ 452,731	$ 446,891	$ 1,001,375	$ 987,416
Costs and Expenses:
Cost of Product Sold	407,740	396,854	886,404	910,170
Selling and Administrative	18,544	19,195	49,617	50,708
Plant Restructuring	2,510	0	2,510	39
Other Operating Income	(38)	(707)	(330)	(876)
Total Costs and Expenses	428,756	415,342	938,201	960,041
Operating Income (Loss)	23,975	31,549	63,174	27,375
Interest Expense, Net	1,943	2,164	5,257	5,830
Earnings (Loss) Before Income Taxes	22,032	29,385	57,917	21,545
Income Taxes Expense (Benefit)	7,242	10,855	20,415	8,107
Net Earnings (Loss)	14,790	18,530	37,502	13,438
Earnings (Loss) Attributable to Common Stock	$ 14,265	$ 17,897	$ 36,188	$ 12,964
Basic Earnings (Loss) per Common Share (Note 10)	$ 1.32	$ 1.53	$ 3.21	$ 1.10
Diluted Earnings (Loss) per Common Share (Note 10)	$ 1.32	$ 1.52	$ 3.19	$ 1.10