Restructuring and Related Activities (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 4,391
Employee termination benefits	2,625		$ 2,625
Income before income taxes and other items	54,989	$ 39,646	68,268	$ 86,053
Net income (loss) attributable to parent	$ 33,273	$ 25,966	$ 48,049	$ 56,115
Diluted	$ 1.34	$ 1.04	$ 1.94	$ 2.23
Ingredients [Member]
Restructuring Cost and Reserve [Line Items]
Employee termination benefits	$ 600
Impairment of Long-Lived Assets Held-for-use	16,100
Tobacco Operations [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	3,900		$ 3,900
Tobacco Operations [Member] | Operating Segments [Member]
Restructuring Cost and Reserve [Line Items]
Income before income taxes and other items	20,000		20,000
Net income (loss) attributable to parent	$ 16,100		$ 16,100
Diluted	$ 0.65		$ 0.65
Tobacco Operations [Member] | Africa [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 2,600		$ 2,600
Tobacco Operations [Member] | TANZANIA, UNITED REPUBLIC OF
Restructuring Cost and Reserve [Line Items]
Liquidation costs	900		900
Tobacco Operations [Member] | North America [Member]
Restructuring Cost and Reserve [Line Items]
Employee termination benefits	$ 400		$ 400