Executive Stock Plans And Stock-Based Compensation (Summary Of Stock Option And SAR Activity) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Outstanding at beginning of year, Weighted-Average Exercise Price	$ 50.07	$ 46.01	$ 45.94
Outstanding at beginning of year, Shares	418,477	855,850	922,598
Granted, Shares			170,400
Exercised, Shares	(161,137)	(407,758)	(195,948)
Cancelled/expired, Shares		(29,615)	(41,200)
Outstanding at end of year, Shares	257,340	418,477	855,850
Granted, Weighted Average Exercise Price			$ 37.86
Exercised, Weighted-Average Exercise Price	$ 42.48	$ 41.21	$ 35.82
Cancelled/expired, Weighted-Average Exercise Price		$ 54.83	$ 59.25
Outstanding at end of year, Weighted-Average Exercise Price	$ 54.83	$ 50.07	$ 46.01
Outstanding at end of year, Weighted-Average Contractual Term	3 years 5 months 22 days
Outstanding at end of year, Aggregate Intrinsic Value	$ 1,418
Exercisable at end of year, Shares	207,068
Exercisable at end of year, Weighted-Average Exercise Price	$ 58.95
Exercisable at end of year, Weighted-Average Contractual Term	2 years 6 months 28 days
Exercisable at end of year, Aggregate Intrinsic Value	512
Expected to vest in future periods, Shares	50,272
Expected to vest in future periods, Weighted-Average Exercise Price	$ 37.86
Expected to vest in future periods, Weighted-Average Contractual Term	7 years 2 months 13 days
Expected to vest in future periods, Aggregate Intrinsic Value	$ 906