Condensed Consolidated Statements of Net (Loss) Earnings (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Sep. 30, 2017	Oct. 01, 2016
Net Sales	$ 376,308	$ 357,247	$ 656,495	$ 609,861
Costs and Expenses:
Cost of Product Sold	355,904	327,035	620,331	559,674
Selling, General and Administrative	18,865	18,702	36,318	35,907
Plant Restructuring (Credit) Charge	(25)	277	56	1,462
Other Operating (Income) Loss	(20)	31	(2,632)	19
Total Costs and Expenses	374,724	346,045	654,073	597,062
Operating Income	1,584	11,202	2,422	12,799
Loss (Earnings) From Equity Investment		270	(21)	(167)
Interest Expense, Net	3,433	2,151	6,650	4,295
(Loss) Earnings Before Income Taxes	(1,849)	8,781	(4,207)	8,671
Income Taxes (Benefit) Expense	(737)	2,637	(2,256)	2,589
Net (Loss) Earnings	(1,112)	6,144	(1,951)	6,082
(Loss) Earnings Applicable to Common Stock	$ (1,114)	$ 6,082	$ (1,952)	$ 6,014
Basic (Loss) Earnings per Common Share (in dollars per share)	$ (0.11)	$ 0.62	$ (0.20)	$ 0.61
Diluted (Loss) Earnings per Common Share (in dollars per share)	$ (0.11)	$ 0.62	$ (0.20)	$ 0.61