Note 3 - Revenue Recognition - Segment Revenue Disaggregated by Product Category Groups (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Dec. 28, 2019	Dec. 29, 2018	Dec. 28, 2019	Dec. 29, 2018
Net sales		$ 392,971	$ 372,238	$ 1,027,898	$ 936,991
Canned Vegetables [Member]
Net sales		251,400	259,500	657,300	631,100
B&G Foods, Inc [Member]
Net sales	[1]	48,700	27,700	117,500	66,700
Frozen [Member]
Net sales		27,800	29,700	72,300	87,500
Fruit [Member]
Net sales		32,200	27,200	81,800	70,700
Chip Products [Member]
Net sales		2,900	2,500	8,900	7,700
Prepared Foods [Member]
Net sales		25,500	22,000	78,900	59,200
Manufactured Product, Other [Member]
Net sales		$ 4,500	$ 3,600	$ 11,200	$ 14,100

[1] B&G includes both canned and frozen vegetable sales exclusively for B&G.