Fair Value Measurements (Financial Assets And Liabilities Measured At Fair Value On Recurring Basis) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Mar. 31, 2019	Sep. 30, 2018
Assets:
Money market funds	$ 2,032	$ 156,864	$ 1,708
Trading securities associated with deferred compensation plans	16,100	16,315	17,344
Interest rate swap agreements			10,205
Forward foreign currency exchange contracts	45	540	142
Total financial assets measured and reported at fair value	18,177	173,719	29,399
Liabilities:
Guarantees of bank loans to tobacco growers	137	803	919
Interest Rate Derivative Liabilities, at Fair Value	21,381	6,351
Forward foreign currency exchange contracts	1,293	386	384
Total financial liabilities measured and reported at fair value	22,811	7,540	1,303
Net Asset Value [Member]
Assets:
Money market funds	2,032	156,864	1,708
Trading securities associated with deferred compensation plans	0	0	0
Interest rate swap agreements			0
Forward foreign currency exchange contracts	0	0	0
Total financial assets measured and reported at fair value	2,032	156,864	1,708
Liabilities:
Guarantees of bank loans to tobacco growers	0	0	0
Interest Rate Derivative Liabilities, at Fair Value	0	0
Forward foreign currency exchange contracts	0	0	0
Total financial liabilities measured and reported at fair value	0	0	0
Level 1 [Member]
Assets:
Money market funds	0	0	0
Trading securities associated with deferred compensation plans	16,100	16,315	17,344
Interest rate swap agreements			0
Forward foreign currency exchange contracts	0	0	0
Total financial assets measured and reported at fair value	16,100	16,315	17,344
Liabilities:
Guarantees of bank loans to tobacco growers	0	0	0
Interest Rate Derivative Liabilities, at Fair Value	0	0
Forward foreign currency exchange contracts	0	0	0
Total financial liabilities measured and reported at fair value	0	0	0
Level 2 [Member]
Assets:
Money market funds	0	0	0
Trading securities associated with deferred compensation plans	0	0	0
Interest rate swap agreements			10,205
Forward foreign currency exchange contracts	45	540	142
Total financial assets measured and reported at fair value	45	540	10,347
Liabilities:
Guarantees of bank loans to tobacco growers	0	0	0
Interest Rate Derivative Liabilities, at Fair Value	21,381	6,351
Forward foreign currency exchange contracts	1,293	386	384
Total financial liabilities measured and reported at fair value	22,674	6,737	384
Level 3 [Member]
Assets:
Money market funds	0	0	0
Trading securities associated with deferred compensation plans	0	0	0
Interest rate swap agreements			0
Forward foreign currency exchange contracts	0	0	0
Total financial assets measured and reported at fair value	0	0	0
Liabilities:
Guarantees of bank loans to tobacco growers	137	803	919
Interest Rate Derivative Liabilities, at Fair Value	0	0
Forward foreign currency exchange contracts	0	0	0
Total financial liabilities measured and reported at fair value	$ 137	$ 803	$ 919