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		9 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 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			7,104	5,714
Withholding of shares from stock-based compensation for grantee income taxes (RSUs, and PSAs)			(2,657)	(2,828)
Dividend equivalents on RSUs			714	529
Net income (loss) attributable to parent	$ 28,135	$ 45,400	72,760	75,144
Net income attributable to noncontrolling interest	2,954	4,819	3,682	6,702
Net (income) loss	31,089	50,219	76,442	81,846
Common stock dividends declared			(56,171)	(41,051)
Repurchase of stock, retained earnings			(1,046)	(9,849)
Dividend equivalents on RSUs			(714)	(529)
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)			(15,600)	14,313
Dividends paid to noncontrolling interests			(1,260)	(1,260)
Total stockholders' equity attributable to parent, ending balance	1,344,485	1,324,944	1,344,485	1,324,944
Noncontrolling interest in subsidiaries, ending balance	45,298	45,729	45,298	45,729
Total shareholders' equity, ending balance	1,389,783	1,370,673	1,389,783	1,370,673
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			7,104	5,714
Withholding of shares from stock-based compensation for grantee income taxes (RSUs, and PSAs)			(2,657)	(2,828)
Dividend equivalents on RSUs			714	529
Net income (loss) attributable to parent			72,760	75,144
Common stock dividends declared			(56,171)	(41,051)
Repurchase of stock, retained earnings			(1,046)	(9,849)
Dividend equivalents on RSUs			(714)	(529)
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			(15,603)	14,115
Dividends paid to noncontrolling interests			0	0
Total stockholders' equity attributable to parent, ending balance	1,344,485	1,324,944	1,344,485	1,324,944
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			3,682	6,702
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			3	198
Dividends paid to noncontrolling interests			(1,260)	(1,260)
Noncontrolling interest in subsidiaries, ending balance	$ 45,298	$ 45,729	45,298	45,729
Common Stock [Member]
Schedule of Capitalization, Equity [Line Items]
Repurchase of common stock			(397)	(2,790)
Common Stock [Member] | Universal Corporation [Member]
Schedule of Capitalization, Equity [Line Items]
Repurchase of common stock			(397)	(2,790)
Common Stock [Member] | Noncontrolling Interests [Member]
Schedule of Capitalization, Equity [Line Items]
Repurchase of common stock			$ 0	$ 0