Note 2 - Revenue Recognition - Segment Revenue Disaggregated by Product Category Groups (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Dec. 31, 2023	Dec. 30, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 30, 2023	Dec. 31, 2022
Net sales	$ 444,481	$ 444,481	$ 473,254	$ 1,150,620	$ 1,150,620	$ 1,178,289
Canned Vegetables [Member]
Net sales		372,690	392,942		952,226	976,026
Frozen [Member]
Net sales		27,454	33,754		92,039	93,560
Fruit [Member]
Net sales		32,022	33,371		71,561	75,674
Snack [Member]
Net sales		3,463	3,360		10,817	10,035
Manufactured Product, Other [Member]
Net sales		$ 8,852	$ 9,827		$ 23,977	$ 22,994