Income Taxes (Income Tax Expense Benefit) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Current Income Tax Expense (Benefit) [Abstract]
Federal									$ 9,592,743	$ 7,135,030	$ 22,262,110
State and local									1,732,162	880,838	4,206,087
Current income tax expense									11,324,905	8,015,868	26,468,197
Deferred Income Tax Expense (Benefit) [Abstract]
Federal									8,325,695	(1,430,623)	(11,892,354)
State and local									2,411,909	(671,462)	(2,916,361)
Deferred income tax benefit									10,737,604	(2,102,085)	(14,808,715)
Income Tax Expense (Benefit) [Abstract]
Federal									17,918,438	5,704,407	10,369,756
State and local									4,144,071	209,376	1,289,726
Income taxes	$ 11,555,000	$ 2,853,000	$ 4,839,000	$ 2,816,000	$ 5,430,000	$ 2,097,000	$ 549,000	$ (2,162,000)	$ 22,062,509	$ 5,913,783	$ 11,659,482