Fair Value Measurements (Financial Assets And Liabilities Measured At Fair Value On Recurring Basis) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2015
Assets:
Money market funds	$ 181,786	$ 116,618	$ 1,574
Trading securities associated with deferred compensation plans	17,347	17,817	20,003
Interest Rate Derivative Assets, at Fair Value			1,960
Forward foreign currency exchange contracts	323	772	620
Total financial assets measured and reported at fair value	199,456	135,207	24,157
Liabilities:
Guarantees of bank loans to tobacco growers	1,848	1,628	1,569
Interest rate swap agreements	14,077	10,766
Forward foreign currency exchange contracts	1,518	5	360
Total financial liabilities measured and reported at fair value	17,443	12,399	1,929
Net Asset Value (NAV) [Member]
Assets:
Money market funds	181,786	116,618	1,574
Trading securities associated with deferred compensation plans	0	0	0
Interest Rate Derivative Assets, at Fair Value			0
Forward foreign currency exchange contracts	0	0	0
Total financial assets measured and reported at fair value	181,786	116,618	1,574
Liabilities:
Guarantees of bank loans to tobacco growers	0	0	0
Interest rate swap agreements	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	17,347	17,817	20,003
Interest Rate Derivative Assets, at Fair Value			0
Forward foreign currency exchange contracts	0	0	0
Total financial assets measured and reported at fair value	17,347	17,817	20,003
Liabilities:
Guarantees of bank loans to tobacco growers	0	0	0
Interest rate swap agreements	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 Derivative Assets, at Fair Value			1,960
Forward foreign currency exchange contracts	323	772	620
Total financial assets measured and reported at fair value	323	772	2,580
Liabilities:
Guarantees of bank loans to tobacco growers	0	0	0
Interest rate swap agreements	14,077	10,766
Forward foreign currency exchange contracts	1,518	5	360
Total financial liabilities measured and reported at fair value	15,595	10,771	360
Level 3 [Member]
Assets:
Money market funds	0	0	0
Trading securities associated with deferred compensation plans	0	0	0
Interest Rate Derivative Assets, at Fair Value			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	1,848	1,628	1,569
Interest rate swap agreements	0	0
Forward foreign currency exchange contracts	0	0	0
Total financial liabilities measured and reported at fair value	$ 1,848	$ 1,628	$ 1,569