CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 28, 2013	Dec. 29, 2012
Income Statement [Abstract]
Net Sales	$ 477,694	$ 452,731	$ 1,046,449	$ 1,001,375
Costs and Expenses:
Cost of Product Sold	446,516	407,740	973,212	886,404
Selling and Administrative	20,271	18,544	52,046	49,617
Plant Restructuring	0	2,510	501	2,510
Other Operating Income	365	(38)	(423)	(330)
Total Costs and Expenses	467,152	428,756	1,025,336	938,201
Operating Income (Loss)	10,542	23,975	21,113	63,174
Interest Expense, Net	1,424	1,943	4,799	5,257
Earnings (Loss) Before Income Taxes	9,118	22,032	16,314	57,917
Income Taxes Expense (Benefit)	2,272	7,242	1,518	20,415
Net Earnings (Loss)	6,846	14,790	14,796	37,502
Earnings (Loss) Attributable to Common Stock	$ 6,622	$ 14,265	$ 14,307	$ 36,188
Basic Earnings (Loss) per Common Share	$ 0.62	$ 1.32	$ 1.33	$ 3.21
Diluted Earnings (Loss) per Common Share	$ 0.61	$ 1.32	$ 1.32	$ 3.19