Note 4 - Revenue Recognition - Segment Revenue Disaggregated by Product Category Groups (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Dec. 29, 2018	Dec. 30, 2017	Dec. 29, 2018	Dec. 30, 2017
Net sales		$ 372,238	$ 354,894	$ 936,991	$ 923,733
Canned Vegetables [Member]
Net sales		259,500	224,400	631,100	563,200
B&G Foods, Inc [Member]
Net sales	[1]	27,700	42,100	66,700	121,900
Frozen [Member]
Net sales		29,700	29,000	87,500	80,100
Fruit [Member]
Net sales		27,200	24,900	70,700	69,500
Chip Products [Member]
Net sales		2,500	2,400	7,700	7,900
Prepared Foods [Member]
Net sales		22,000	28,200	59,200	69,400
Manufactured Product, Other [Member]
Net sales		$ 3,600	$ 3,900	$ 14,100	$ 11,700

[1] B&G includes both canned and frozen vegetable sales exclusively for B&G under the Green Giant label.