Condensed Consolidated Statements of Net Earnings (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2022	Jan. 01, 2022	Dec. 31, 2022	Jan. 01, 2022
Net sales	$ 473,254	$ 445,593	$ 1,178,289	$ 1,052,891
Costs and expenses:
Cost of product sold	419,465	400,608	1,059,878	931,555
Selling, general and administrative	21,914	21,032	60,636	57,442
Plant restructuring charge (credit)	1,829	(110)	1,937	3
Other operating expense (income), net	229	399	(2,411)	681
Total costs and expenses	443,437	421,929	1,120,040	989,681
Operating income	29,817	23,664	58,249	63,210
Other income and expenses:
Loss from equity investment	0	0	0	7,775
Other non-operating income	(2,017)	(2,218)	(5,070)	(6,969)
Interest expense, net	4,277	1,505	8,037	4,183
Earnings before income taxes	27,557	24,377	55,282	58,221
Income taxes	6,503	5,713	12,994	13,767
Net earnings	$ 21,054	$ 18,664	$ 42,288	$ 44,454
Earnings per share:
Basic (in dollars per share)	$ 2.77	$ 2.16	$ 5.36	$ 5.02
Diluted (in dollars per share)	$ 2.74	$ 2.14	$ 5.31	$ 4.98
Weighted average common shares outstanding:
Basic (in shares)	7,582	8,603	7,858	8,813
Diluted (in shares)	7,655	8,674	7,931	8,884