Earnings Per Share Earnings Per Share (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Stock Repurchased And Retired During Period Value Retained Earnings	$ 0	$ 0	$ (74,353)
Series B 6.75% Convertible Perpetual Preferred Stock [Member]
Preferred stock, shares converted to common stock	0	0	111,072
Stock Repurchased and Retired During Period, Shares			107,418
Stock Repurchased And Retired During Period Value Retained Earnings			$ (74,353)
Common Stock [Member]
Conversion of Stock, Shares Issued			2,487,118