Operating Segments (Operating Results For The Company's Reportable Segments) (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Sales and other operating revenues		$ 632,094	$ 505,049	$ 475,921	$ 296,915	$ 671,723	$ 636,107	$ 539,604	$ 379,719	$ 1,909,979	$ 2,227,153	$ 2,033,947
Operating Income										126,367	161,169	170,825
Equity in pretax earnings of unconsolidated affiliates	[1]									(4,211)	(5,299)	(9,125)
Restructuring and impairment costs	[2]									(7,543)	(20,304)	0
Segment Assets		2,120,921				2,133,184				2,120,921	2,133,184	2,168,632
Accounts Receivable, after Allowance for Credit Loss	[3]	340,711				368,110				340,711	368,110	377,119
Goodwill and other intangibles, net		144,687				97,994				144,687	97,994	98,927
Depreciation and Amortization										38,379	37,150	34,893
Capital Expenditures										35,227	38,760	34,037
Accounts Receivable, Allowance for Credit Loss, Current		2,000				3,000				$ 2,000	3,000	2,000
Due Period Of Accounts Receivables										30 days
Operating Segments [Member]
Segment Reporting Information [Line Items]
Sales and other operating revenues										$ 1,909,979	2,227,153	2,033,947
Operating Income										138,121	186,772	179,950
Flue-Cured And Burley Leaf Tobacco Operations [Member]
Segment Reporting Information [Line Items]
Sales and other operating revenues										1,608,686	1,952,369	1,790,879
Operating Income										119,119	174,596	169,852
Segment Assets		1,626,534				1,767,164				1,626,534	1,767,164	1,829,633
Accounts Receivable, after Allowance for Credit Loss	[3]	283,930				327,381				283,930	327,381	340,939
Goodwill and other intangibles, net		96,308				96,281				96,308	96,281	97,214
Depreciation and Amortization										28,624	28,844	29,319
Capital Expenditures										30,226	25,706	25,136
Flue-Cured And Burley Leaf Tobacco Operations [Member] | North America [Member]
Segment Reporting Information [Line Items]
Sales and other operating revenues										236,262	382,631	308,691
Operating Income										8,353	23,069	23,091
Segment Assets		290,720				294,064				290,720	294,064	368,672
Accounts Receivable, after Allowance for Credit Loss	[3]	33,232				31,939				33,232	31,939	44,726
Goodwill and other intangibles, net		0				0				0	0	0
Depreciation and Amortization										4,413	4,756	4,772
Capital Expenditures										1,997	3,137	3,316
Flue-Cured And Burley Leaf Tobacco Operations [Member] | Other Regions [Member]
Segment Reporting Information [Line Items]
Sales and other operating revenues	[4]									1,372,424	1,569,738	1,482,188
Operating Income	[4]									110,766	151,527	146,761
Segment Assets	[4]	1,335,814				1,473,100				1,335,814	1,473,100	1,460,961
Accounts Receivable, after Allowance for Credit Loss	[3]	250,698				295,442				250,698	295,442	296,213
Goodwill and other intangibles, net	[4]	96,308				96,281				96,308	96,281	97,214
Depreciation and Amortization	[4]									24,211	24,088	24,547
Capital Expenditures	[4]									28,229	22,569	21,820
Other Tobacco Operations [Member]
Segment Reporting Information [Line Items]
Sales and other operating revenues	[5]									301,293	274,784	243,068
Operating Income	[5]									19,002	12,176	10,098
Segment Assets	[5]	494,387				366,020				494,387	366,020	338,999
Accounts Receivable, after Allowance for Credit Loss	[3]	56,781				40,729				56,781	40,729	36,180
Goodwill and other intangibles, net	[5]	$ 48,379				$ 1,713				48,379	1,713	1,713
Depreciation and Amortization	[5]									9,755	8,306	5,574
Capital Expenditures	[5]									$ 5,001	$ 13,054	$ 8,901

[1] Equity in pretax earnings of unconsolidated affiliates is included in segment operating income (Other Tobacco Operations segment), but is reported below consolidated operating income and excluded from that total in the consolidated statements of 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 (see Note 4)

[3] Accounts receivable, net includes allowances for doubtful accounts of approximately $2.0 million, $3.0 million and $2.0 million at March 31, 2020, 2019, and 2018 respectively. Accounts receivable are generally unsecured and due within 30 days.

[4] Includes South America, Africa, Europe, and Asia regions, as well as inter-region eliminations.

[5] Includes Dark Air-Cured, Oriental, and Special Services, as well as intercompany eliminations. Sales and other operating revenues, accounts receivable, goodwill and intangibles, depreciation and amortization, and capital expenditures include limited amounts or no amounts for Oriental because the business is accounted for on the equity method and its financial results consist principally of equity in the pretax earnings of the unconsolidated affiliate. The investment in the unconsolidated affiliate is included in segment assets and was approximately $76.4 million, $79.2 million, and $89.3 million, at March 31, 2020, 2019, and 2018, respectively.