Operating Segments (Operating Results For The Company's Reportable Segments) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Mar. 31, 2025	Mar. 31, 2024
Segment Reporting Information [Line Items]
Sales and other operating revenues		$ 754,177	$ 710,762	$ 1,347,939	$ 1,307,812
Cost of Product and Service Sold		(614,347)	(567,617)	(1,093,982)	(1,068,746)
Selling, General and Administrative Expense		(72,181)	(63,836)	(151,373)	(142,532)
CorporateOverhead		(20,083)	(18,306)	(42,484)	(37,675)
Equity In Pretax Earnings Of Unconsolidated Affiliates	[1]	2,561	642	126	502
Restructuring and impairment costs	[2]	0	10,573	1,122	10,573
Operating Income (Loss)		67,649	68,736	101,462	85,961
Segment assets		3,070,439	3,045,586	3,070,439	3,045,586	$ 2,989,552
Accounts Receivable, after Allowance for Credit Loss		445,257	537,602	445,257	537,602	625,876
Goodwill, net		213,815	213,872	213,815	213,872	213,840	$ 213,869
Other intangibles, net		52,650	63,263	52,650	63,263	57,836
Segment, Expenditure, Addition to Long-Lived Assets				21,099	38,796
Depreciation and amortization				27,198	29,420
Excluding Corp Overhead
Segment Reporting Information [Line Items]
Selling, General and Administrative Expense		(52,098)	(45,530)	(108,889)	(104,857)
Tobacco Operations
Segment Reporting Information [Line Items]
Sales and other operating revenues		659,423	630,212	1,164,119	1,142,167
Cost of Product and Service Sold		(534,668)	(503,147)	(942,535)	(937,912)
Selling, General and Administrative Expense		(40,057)	(33,657)	(84,811)	(80,205)
CorporateOverhead		(16,889)	(15,432)	(35,729)	(31,760)
Equity In Pretax Earnings Of Unconsolidated Affiliates	[1]	2,561	642	126	502
Operating Income (Loss)		65,248	77,334	100,918	91,788
Segment assets		2,555,801	2,533,062	2,555,801	2,533,062	2,436,416
Accounts Receivable, after Allowance for Credit Loss		383,623	477,855	383,623	477,855	566,755
Goodwill, net		97,747	97,804	97,747	97,804	97,772
Other intangibles, net		55	66	55	66	47
Segment, Expenditure, Addition to Long-Lived Assets				13,711	18,781
Depreciation and amortization				16,378	19,835
Ingredients
Segment Reporting Information [Line Items]
Sales and other operating revenues		94,754	80,550	183,820	165,645
Cost of Product and Service Sold		(79,679)	(64,470)	(151,447)	(130,834)
Selling, General and Administrative Expense		(12,041)	(11,873)	(24,078)	(24,652)
CorporateOverhead		(3,194)	(2,874)	(6,755)	(5,915)
Equity In Pretax Earnings Of Unconsolidated Affiliates	[1]	0	0	0	0
Operating Income (Loss)		(160)	1,333	1,540	4,244
Segment assets		514,638	512,524	514,638	512,524	553,136
Accounts Receivable, after Allowance for Credit Loss		61,634	59,747	61,634	59,747	59,121
Goodwill, net		116,068	116,068	116,068	116,068	116,068
Other intangibles, net		52,595	63,197	52,595	63,197	$ 57,789
Segment, Expenditure, Addition to Long-Lived Assets				7,388	20,015
Depreciation and amortization				10,820	9,585
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)		$ 65,088	$ 78,667	$ 102,458	$ 96,032

[1] Equity in pretax earnings (loss) of unconsolidated affiliates is included in segment operating income (Tobacco Operations), but is reported below consolidated operating income and excluded from that total in the consolidated statements of income and comprehensive income.

[2] Restructuring and impairment costs are excluded from segment operating income, but are included in consolidated operating income in the consolidated statements of income and comprehensive income. See Note 2 for additional information.