Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands		6 Months Ended
		Sep. 30, 2025	Sep. 30, 2024	Mar. 31, 2025	Mar. 31, 2024
Pension and other postretirement benefit plans:
Accumulated other comprehensive loss		$ (71,210)	$ (87,156)	$ (80,051)
Stockholders' Equity Attributable to Parent		1,469,982	1,420,566	1,458,556
Accumulated Translation Adjustment [Member]
Foreign currency translation:
Net gain (loss) on foreign currency translation		7,954	3,933
Less: Net (gain) loss on foreign currency translation attributable to noncontrolling interests		255	393
Other comprehensive income (loss) attributable to Universal Corporation, net of income taxes		8,209	4,326
Pension and other postretirement benefit plans:
Stockholders' Equity Attributable to Parent		(34,430)	(40,489)	(42,639)	$ (44,815)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] | Forward Foreign Currency Exchange Contract [Member]
Cash flow hedges: [Abstract]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax		3,254	(911)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax	[1]	971	(507)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax		4,225	(1,418)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax		(479)	515
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax		442	(145)
Pension and other postretirement benefit plans:
Stockholders' Equity Attributable to Parent		(689)	(2,034)	(4,914)	(616)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] | Interest Rate Swap [Member]
Cash flow hedges: [Abstract]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax		(1,047)	(4,567)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax	[2]	(2,044)	(3,142)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax		(3,091)	(7,709)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax		374	1,779
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax		(730)	(1,224)
Pension and other postretirement benefit plans:
Stockholders' Equity Attributable to Parent		(257)	779	2,834	8,488
Accumulated Defined Benefit Plans Adjustment [Member]
Pension and other postretirement benefit plans:
Amortization included in earnings (net of tax expense (benefit) of $67 and $0)(3)	[3]	(502)	(770)
Other comprehensive income (loss) attributable to Universal Corporation, net of income taxes		(502)	(770)
Taxes on amortization included in net income		67	0
Stockholders' Equity Attributable to Parent		$ 35,834	$ 45,412	$ 35,332	$ 44,642

[1] Gain (loss) on foreign currency cash flow hedges related to forecast purchases of tobacco and crop input sales is reclassified from accumulated other comprehensive income (loss) to cost of goods sold when the tobacco is sold to customers. See Note 8 for additional information.

[2] Gain (loss) on interest rate cash flow hedges is reclassified from accumulated other comprehensive income (loss) to interest expense when the related interest payments are made on the underlying debt, or as amortized to interest expense over the period to original maturity for terminated swap agreements. See Note 8 for additional information.

[3] This accumulated other comprehensive income (loss) component is included in the computation of net periodic benefit cost. See Note 10 for additional information.