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Earnings Per Share Earnings Per Share (Narrative) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2015
Stock Repurchased And Retired During Period Value Retained Earnings     $ (74,353) $ 0 $ (36)
Series B 6.75% Convertible Perpetual Preferred Stock [Member]          
Conversion of Stock, Shares Converted   111,072 (111,072) 0 0
Stock Repurchased and Retired During Period, Shares 107,418        
Stock Repurchased And Retired During Period Value Retained Earnings $ 74,400   $ 74,353   $ (36)
Common Stock [Member]          
Conversion of Stock, Shares Issued   2,487,118