Stock-Based Compensation (Summary Of Options Outstanding) (Details) (USD $)	12 Months Ended
	Mar. 31, 2014
Number Outstanding	38,000
Weighted Average Exercise Price	$ 31.78
Weighted Remaining Contractual Life (years)	4 years 2 months 12 days
Range One [Member]
Ranges of Exercise Prices, Lower Limit	$ 15.08
Number Outstanding	20,000
Weighted Average Exercise Price	$ 16.21
Weighted Remaining Contractual Life (years)	1 year 9 months 18 days
Range Two [Member]
Ranges of Exercise Prices, Lower Limit	$ 31.27
Number Outstanding	5,000
Weighted Average Exercise Price	$ 37.12
Weighted Remaining Contractual Life (years)	4 years 9 months 18 days
Range Three [Member]
Ranges of Exercise Prices, Lower Limit	$ 51.04
Number Outstanding	13,000
Weighted Average Exercise Price	$ 53.69
Weighted Remaining Contractual Life (years)	7 years 7 months 6 days