CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS (USD $)	3 Months Ended		9 Months Ended
	Dec. 27, 2014	Dec. 28, 2013	Dec. 27, 2014	Dec. 28, 2013
Income Statement [Abstract]
Net Sales	$ 456,207,000	$ 477,694,000	$ 1,008,411,000	$ 1,046,449,000
Costs and Expenses:
Cost of Product Sold	430,123,000	446,516,000	948,527,000	973,212,000
Selling and Administrative	18,759,000	20,271,000	50,681,000	52,046,000
Plant Restructuring	889,000		889,000	501,000
Other Operating Income	(5,033,000)	365,000	(4,839,000)	(423,000)
Total Costs and Expenses	444,738,000	467,152,000	995,258,000	1,025,336,000
Operating Income (Loss)	11,469,000	10,542,000	13,153,000	21,113,000
Interest Expense, Net	1,431,000	1,424,000	3,917,000	4,799,000
Earnings From Equity Investment	(55,000)	0	231,000
Earnings (Loss) Before Income Taxes	9,983,000	9,118,000	9,467,000	16,314,000
Income Taxes Expense (Benefit)	2,164,000	2,272,000	2,333,000	1,518,000
Net Earnings (Loss)	7,819,000	6,846,000	7,134,000	14,796,000
Earnings (Loss) Attributable to Common Stock	$ 7,711,000	$ 6,622,000	$ 6,995,000	$ 14,307,000
Basic Earnings (Loss) per Common Share	$ 0.72	$ 0.62	$ 0.65	$ 1.33
Diluted Earnings (Loss) per Common Share	$ 0.71	$ 0.61	$ 0.65	$ 1.32