CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 26, 2015	Sep. 27, 2014	Sep. 26, 2015	Sep. 27, 2014
Income Statement [Abstract]
Net Sales	$ 313,202	$ 312,161	$ 539,460	$ 552,204
Costs and Expenses:
Cost of Product Sold	284,428	295,357	490,107	518,404
Selling and Administrative	17,394	16,203	32,450	31,922
Plant Restructuring	15	0	(66)	0
Other Operating (Income) Loss	(67)	(85)	(403)	194
Total Costs and Expenses	301,770	311,475	522,088	550,520
Operating Income (Loss)	11,432	686	17,372	1,684
Interest Expense, Net	1,590	1,417	2,962	2,486
Earnings From Equity Investment	86	80	86	(286)
Earnings (Loss) Before Income Taxes	9,756	(811)	14,324	(516)
Income Taxes Expense (Benefit)	3,234	(233)	4,834	169
Net Earnings (Loss)	6,522	(578)	9,490	(685)
Earnings (Loss) Attributable to Common Stock	$ 6,456	$ (576)	$ 9,376	$ (684)
Basic Earnings (Loss) per Common Share	$ 0.65	$ (0.05)	$ 0.95	$ (0.06)
Diluted Earnings (Loss) per Common Share	$ 0.65	$ (0.05)	$ 0.94	$ (0.06)