Changes In Shareholders' Equity And Noncontrolling Interests In Subsidiaries (Reconciliation Of Changes In Shareholders' Equity And Noncontrolling Interests In Subsidiaries) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Schedule of Capitalization, Equity [Line Items]
Total stockholders' equity attributable to parent, beginning balance			$ 1,307,299
Noncontrolling interests in subsidiaries, beginning balance			41,126
Total shareholders' equity, beginning balance	$ 1,341,555	$ 1,278,333	1,348,425	$ 1,289,284
Accrual of stock-based compensation	1,119	1,075	4,085	3,708
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	26	19	2,458	1,949
Dividend equivalents on RSUs	272	256	536	500
Net income (loss) attributable to parent	19,510	7,502	25,867	14,776
Net income attributable to noncontrolling interest	2,245	747	(200)	373
Net (income) loss	21,755	8,249	25,667	15,149
Common stock dividends declared	(19,195)	(18,877)	(38,365)	(37,740)
Dividend equivalents on RSUs	(272)	(257)	(536)	(501)
Other comprehensive income (loss)	(8,086)	13,811	748	14,120
Dividends paid to noncontrolling interests	(3,696)	(3,695)	(4,676)	(3,695)
Total stockholders' equity attributable to parent, ending balance	1,297,332	1,239,500	1,297,332	1,239,500
Noncontrolling interest in subsidiaries, ending balance	36,094	39,376	36,094	39,376
Total shareholders' equity, ending balance	1,333,426	1,278,876	1,333,426	1,278,876
Universal Corporation [Member]
Schedule of Capitalization, Equity [Line Items]
Total stockholders' equity attributable to parent, beginning balance	1,303,825	1,236,244	1,307,299	1,246,665
Accrual of stock-based compensation	1,119	1,075	4,085	3,708
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	26	19	2,458	1,949
Dividend equivalents on RSUs	272	256	536	500
Net income (loss) attributable to parent	19,510	7,502	25,867	14,776
Common stock dividends declared	(19,195)	(18,877)	(38,365)	(37,740)
Dividend equivalents on RSUs	(272)	(257)	(536)	(501)
Other comprehensive income (loss) attributable to parent	(7,901)	13,576	904	14,041
Dividends paid to noncontrolling interests	0	0	0	0
Total stockholders' equity attributable to parent, ending balance	1,297,332	1,239,500	1,297,332	1,239,500
Noncontrolling Interests [Member]
Schedule of Capitalization, Equity [Line Items]
Noncontrolling interests in subsidiaries, beginning balance	37,730	42,089	41,126	42,619
Accrual of stock-based compensation	0	0	0	0
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	0	0	0	0
Dividend equivalents on RSUs	0	0	0	0
Net income attributable to noncontrolling interest	2,245	747	(200)	373
Common stock dividends declared	0	0	0	0
Dividend equivalents on RSUs	0	0	0	0
Other comprehensive income (loss) attributable to noncontrolling interest	(185)	235	(156)	79
Dividends paid to noncontrolling interests	(3,696)	(3,695)	(4,676)	(3,695)
Noncontrolling interest in subsidiaries, ending balance	$ 36,094	$ 39,376	$ 36,094	$ 39,376