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, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Schedule of Capitalization, Equity [Line Items]
Total stockholders' equity attributable to parent, beginning balance			$ 1,246,665
Noncontrolling interests in subsidiaries, beginning balance			42,619
Total shareholders' equity, beginning balance	$ 1,278,333	$ 1,352,078	1,289,284	$ 1,379,878
Repurchase of common stock	0	(1,800)	0	(2,974)
Accrual of stock-based compensation	1,075	959	3,708	3,687
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	19	0	1,949	2,883
Dividend equivalents on RSUs	256	253	500	497
Net income (loss) attributable to parent	7,502	28,077	14,776	30,149
Net income attributable to noncontrolling interest	747	1,670	373	493
Net (income) loss	8,249	29,747	15,149	30,642
Common stock dividends declared	(18,877)	(18,879)	(37,740)	(37,858)
Repurchase of stock, retained earnings	0	(5,324)	0	(9,364)
Dividend equivalents on RSUs	(257)	(253)	(501)	(497)
Other comprehensive income (loss) attributable to parent			14,120	(19,186)
Other comprehensive income (loss)	13,811	(14,839)
Dividends paid to noncontrolling interests	(3,695)	(3,359)	(3,695)	(3,359)
Total stockholders' equity attributable to parent, ending balance	1,239,500	1,298,659	1,239,500	1,298,659
Noncontrolling interest in subsidiaries, ending balance	39,376	39,924	39,376	39,924
Total shareholders' equity, ending balance	1,278,876	1,338,583	1,278,876	1,338,583
Universal Corporation [Member]
Schedule of Capitalization, Equity [Line Items]
Total stockholders' equity attributable to parent, beginning balance	1,236,244	1,310,341	1,246,665	1,337,087
Repurchase of common stock	0	(1,800)	0	(2,974)
Accrual of stock-based compensation	1,075	959	3,708	3,687
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	19	0	1,949	2,883
Dividend equivalents on RSUs	256	253	500	497
Net income (loss) attributable to parent	7,502	28,077	14,776	30,149
Common stock dividends declared	(18,877)	(18,879)	(37,740)	(37,858)
Repurchase of stock, retained earnings	0	(5,324)	0	(9,364)
Dividend equivalents on RSUs	(257)	(253)	(501)	(497)
Other comprehensive income (loss) attributable to parent	13,576	(14,715)	14,041	(19,185)
Dividends paid to noncontrolling interests	0	0	0	0
Total stockholders' equity attributable to parent, ending balance	1,239,500	1,298,659	1,239,500	1,298,659
Noncontrolling Interests [Member]
Schedule of Capitalization, Equity [Line Items]
Noncontrolling interests in subsidiaries, beginning balance	42,089	41,737	42,619	42,791
Repurchase of common stock	0	0	0	0
Accrual of stock-based compensation	0	0	0	0
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	0		0	0
Dividend equivalents on RSUs	0	0	0	0
Net income attributable to noncontrolling interest	747	1,670	373	493
Common stock dividends declared	0	0	0	0
Repurchase of stock, retained earnings	0	0	0	0
Dividend equivalents on RSUs	0	0	0	0
Other comprehensive income (loss) attributable to noncontrolling interest	235	(124)	79	(1)
Dividends paid to noncontrolling interests	(3,695)	(3,359)	(3,695)	(3,359)
Noncontrolling interest in subsidiaries, ending balance	$ 39,376	$ 39,924	$ 39,376	$ 39,924