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Stockholders' Equity (Table Text Block)
9 Months Ended
Dec. 31, 2019
Stockholders' Equity [Abstract]  
Common stock dividends Common Stock Dividends Declared Date   Per Share Amount   Record Date   Dividend Date               March 6, 2019 $ 0.50   March 21, 2019   April 4, 2019 August 22, 2019   0.50   September 9, 2019   September 23, 2019 December 4, 2019   0.50   December 19, 2019   January 6, 2020