Stockholders' Equity (Narratives) (Details)	12 Months Ended
	Mar. 31, 2023 $ / shares
Dividends declared one [Member] | Common Stock [Member]
Dividends Declared
Dividends payable, date declared	Aug. 18, 2022
Dividend paid, amount per share	$ 0.50
Dividends payable, date of record	Sep. 06, 2022
Dividends payable, date to be paid	Sep. 20, 2022
Dividends declared one [Member] | Nonvoting Common Stock [Member]
Dividends Declared
Dividends payable, date declared	Mar. 03, 2023
Dividend paid, amount per share	$ 0.04
Dividends payable, date of record	Mar. 14, 2023
Dividends payable, date to be paid	Mar. 27, 2023
Dividends declared two [Member] | Common Stock [Member]
Dividends Declared
Dividends payable, date declared	Apr. 06, 2022
Dividend paid, amount per share	$ 0.50
Dividends payable, date of record	Apr. 18, 2022
Dividends payable, date to be paid	Apr. 29, 2022
Dividends declared two [Member] | Nonvoting Common Stock [Member]
Dividends Declared
Dividends payable, date declared	Dec. 07, 2022
Dividend paid, amount per share	$ 0.04
Dividends payable, date of record	Dec. 19, 2022
Dividends payable, date to be paid	Dec. 30, 2022
Dividends declared three [Member] | Common Stock [Member]
Dividends Declared
Dividends payable, date declared	Oct. 06, 2021
Dividend paid, amount per share	$ 0.50
Dividends payable, date of record	Oct. 18, 2021
Dividends payable, date to be paid	Oct. 29, 2021
Dividends declared four [Member] | Common Stock [Member]
Dividends Declared
Dividends payable, date declared	Aug. 19, 2021
Dividend paid, amount per share	$ 0.50
Dividends payable, date of record	Sep. 07, 2021
Dividends payable, date to be paid	Sep. 21, 2021
Dividends declared five [Member] | Common Stock [Member]
Dividends Declared
Dividends payable, date declared	Jun. 09, 2021
Dividend paid, amount per share	$ 0.50
Dividends payable, date of record	Jun. 24, 2021
Dividends payable, date to be paid	Jul. 08, 2021