Condensed Consolidated Statements of Net Earnings (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 01, 2022	Dec. 26, 2020	Jan. 01, 2022	Dec. 26, 2020
Net sales	$ 445,593	$ 484,392	$ 1,052,891	$ 1,162,851
Costs and expenses:
Cost of product sold	400,608	406,688	931,555	987,642
Selling, general and administrative	21,032	22,613	57,442	60,211
Plant restructuring (credit)/charge	(110)	(118)	3	169
Other operating loss/(income)	399	(35,351)	681	(33,716)
Total costs and expenses	421,929	393,832	989,681	1,014,306
Operating income	23,664	90,560	63,210	148,545
Loss from equity investment	0	(728)	7,775	752
Other (income)/loss	(2,218)	(234)	(6,969)	2,457
Interest expense, net	1,505	1,531	4,183	4,586
Earnings before income taxes	24,377	89,991	58,221	140,750
Income taxes	5,713	17,531	13,767	29,479
Net earnings	$ 18,664	$ 72,460	$ 44,454	$ 111,271
Basic earnings per common share (in dollars per share)	$ 2.16	$ 7.96	$ 5.02	$ 12.18
Diluted earnings per common share: (in dollars per share)	$ 2.14	$ 7.90	$ 4.98	$ 12.09