Common And Preferred Stock (Schedule Of Repurchases Of Shares) (Details) - Common Stock [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Class of Stock [Line Items]
Stock Repurchased During Period, Shares	100,000	66,124	58,264
Cost of shares repurchased (in thousands of dollars)	$ 4,744	$ 3,448	$ 3,053
Weighted-average cost per share	$ 47.44	$ 52.12	$ 52.41