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
	Jun. 30, 2018	Jun. 30, 2017
Schedule of Capitalization, Equity [Line Items]
Total stockholders' equity attributable to parent, beginning balance	$ 1,342,429
Noncontrolling interests in subsidiaries, beginning balance	42,873
Total shareholders' equity, beginning balance	1,385,302	$ 1,326,578
Accrual of stock-based compensation	4,198	2,660
Withholding of shares from stock-based compensation for grantee income taxes (RSUs, and PSAs)	(2,656)	(2,827)
Dividend equivalents on RSUs	185	175
Net income (loss) attributable to parent	13,179	3,577
Net income attributable to noncontrolling interest	(2,119)	(256)
Net (income) loss	11,060	3,321
Common stock dividends declared	(18,718)	(13,676)
Repurchase of stock, retained earnings	(1,046)	0
Dividend equivalents on RSUs	(185)	(175)
Adoption of FASB Accounting Standards Update 2016-16 eliminating deferred income taxes on unrecognized gains on intra-entity transfers of assets other than inventory	(1,934)	0
Other comprehensive income (loss)	(13,537)	5,788
Total stockholders' equity attributable to parent, ending balance	1,321,677	1,282,059
Noncontrolling interest in subsidiaries, ending balance	40,595	39,785
Total shareholders' equity, ending balance	1,362,272	1,321,844
Universal Corporation [Member]
Schedule of Capitalization, Equity [Line Items]
Total stockholders' equity attributable to parent, beginning balance	1,342,429	1,286,489
Accrual of stock-based compensation	4,198	2,660
Withholding of shares from stock-based compensation for grantee income taxes (RSUs, and PSAs)	(2,656)	(2,827)
Dividend equivalents on RSUs	185	175
Net income (loss) attributable to parent	13,179	3,577
Common stock dividends declared	(18,718)	(13,676)
Repurchase of stock, retained earnings	(1,046)	0
Dividend equivalents on RSUs	(185)	(175)
Adoption of FASB Accounting Standards Update 2016-16 eliminating deferred income taxes on unrecognized gains on intra-entity transfers of assets other than inventory	(1,934)	0
Other comprehensive income (loss) attributable to parent	(13,378)	5,836
Total stockholders' equity attributable to parent, ending balance	1,321,677	1,282,059
Noncontrolling Interests [Member]
Schedule of Capitalization, Equity [Line Items]
Noncontrolling interests in subsidiaries, beginning balance	42,873	40,089
Accrual of stock-based compensation	0	0
Withholding of shares from stock-based compensation for grantee income taxes (RSUs, and PSAs)	0	0
Dividend equivalents on RSUs	0	0
Net income attributable to noncontrolling interest	(2,119)	(256)
Common stock dividends declared	0	0
Repurchase of stock, retained earnings	0	0
Dividend equivalents on RSUs	0	0
Adoption of FASB Accounting Standards Update 2016-16 eliminating deferred income taxes on unrecognized gains on intra-entity transfers of assets other than inventory	0	0
Other comprehensive income (loss) attributable to noncontrolling interest	(159)	(48)
Noncontrolling interest in subsidiaries, ending balance	40,595	39,785
Common Stock [Member]
Schedule of Capitalization, Equity [Line Items]
Repurchase of common stock	397	0
Common Stock [Member] | Universal Corporation [Member]
Schedule of Capitalization, Equity [Line Items]
Repurchase of common stock	397	0
Common Stock [Member] | Noncontrolling Interests [Member]
Schedule of Capitalization, Equity [Line Items]
Repurchase of common stock	$ 0	$ 0