Fair Value Measurements (Financial Assets And Liabilities Measured At Fair Value On Recurring Basis) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2016
Assets:
Money market funds	$ 22,209	$ 137,145	$ 181,786
Trading securities associated with deferred compensation plans	17,273	17,726	17,347
Interest rate swap agreements	1,201	2,149
Forward foreign currency exchange contracts	626	973	323
Total financial assets measured and reported at fair value	41,309	157,993	199,456
Liabilities:
Guarantees of bank loans to tobacco growers	1,169	1,177	1,848
Interest rate swap agreements			14,077
Forward foreign currency exchange contracts	947	175	1,518
Total financial liabilities measured and reported at fair value	2,116	1,352	17,443
Net Asset Value (NAV) [Member]
Assets:
Money market funds	22,209	137,145	181,786
Trading securities associated with deferred compensation plans	0	0	0
Interest rate swap agreements	0	0
Forward foreign currency exchange contracts	0	0	0
Total financial assets measured and reported at fair value	22,209	137,145	181,786
Liabilities:
Guarantees of bank loans to tobacco growers	0	0	0
Interest rate swap agreements			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	17,273	17,726	17,347
Interest rate swap agreements	0	0
Forward foreign currency exchange contracts	0	0	0
Total financial assets measured and reported at fair value	17,273	17,726	17,347
Liabilities:
Guarantees of bank loans to tobacco growers	0	0	0
Interest rate swap agreements			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	1,201	2,149
Forward foreign currency exchange contracts	626	973	323
Total financial assets measured and reported at fair value	1,827	3,122	323
Liabilities:
Guarantees of bank loans to tobacco growers	0	0	0
Interest rate swap agreements			14,077
Forward foreign currency exchange contracts	947	175	1,518
Total financial liabilities measured and reported at fair value	947	175	15,595
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	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	1,169	1,177	1,848
Interest rate swap agreements			0
Forward foreign currency exchange contracts	0	0	0
Total financial liabilities measured and reported at fair value	$ 1,169	$ 1,177	$ 1,848