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Income Taxes (Income Tax Reconciliation) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2021
Income tax expense reconciliation to U.S. federal tax rate [Abstract]
Expected income tax									$ 5,700,613	$ 13,771,657	$ 23,394,720
Increase (reduction) in income taxes resulting from:
State tax (excluding state tax credits), net of federal benefit									328,026	1,489,800	2,053,524
Federal tax credits, net									(200,203)	(1,193,021)	(1,173,435)
State tax credits									(162,619)	(470,916)	0
Uncertain tax positions									(1,151,234)	(555,252)	(2,107,263)
Executive compensation limitation under Section 162(m)									732,504	1,918,618	1,203,203
Excess tax benefits related to equity compensation									(73,644)	(3,237,682)	(996,769)
Other, net									740,340	(63,722)	746,619
Income tax expenses (benefit)	$ 8,990,000	$ 619,000	$ (246,000)	$ (3,449,000)	$ 4,857,000	$ 391,000	$ 1,641,000	$ 4,770,000	$ 5,913,783	$ 11,659,482	$ 23,120,599