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Stockholders' Equity (Narratives) (Details) | 12 Months Ended
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Mar. 31, 2021 $ / shares
Dividends Declared |
Dividends payable, date declared | Dec. 09, 2020
Dividend paid, amount per share | $ 2.00
Dividends payable, date of record | Dec. 21, 2020
Dividends payable, date to be paid | Dec. 30, 2020
Dividends declared two [Member] |
Dividends Declared |
Dividends payable, date declared | Aug. 20, 2020
Dividend paid, amount per share | $ 0.50
Dividends payable, date of record | Sep. 07, 2020
Dividends payable, date to be paid | Sep. 21, 2020
Dividends declared three [Member] |
Dividends Declared |
Dividends payable, date declared | Dec. 04, 2019
Dividend paid, amount per share | $ 0.50
Dividends payable, date of record | Dec. 19, 2019
Dividends payable, date to be paid | Jan. 06, 2020
Dividends declared four [Member] |
Dividends Declared |
Dividends payable, date declared | Aug. 22, 2019
Dividend paid, amount per share | $ 0.50
Dividends payable, date of record | Sep. 09, 2019
Dividends payable, date to be paid | Sep. 23, 2019

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