Allowance for Credit Losses and Credit Quality Information (Rollforward of Allowance For Loan Losses) (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
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				$ 134,242,862				$ 91,722,288	$ 134,242,862	$ 91,722,288	$ 96,487,856
Provision for credit losses	$ 45,412,000	$ 59,609,000	$ 68,620,000	$ 85,822,000	$ 57,439,000	$ 56,459,000	$ 42,044,000	$ 30,266,000	259,463,199	186,207,341	86,244,714
Charge-offs									(302,380,145)	(164,747,552)	(141,270,125)
Recoveries									34,226,817	21,060,785	21,631,475
Net charge-off									(268,153,328)	(143,686,767)	(119,638,650)
Ending Balance	$ 125,552,733				$ 134,242,862				125,552,733	$ 134,242,862	91,722,288
Charge offs									15,800,000
Proceeds from prior write offs, prior periods									8,400,000
Proceeds from prior write offs, current period									$ 7,400,000
Impact of ASC 326 adoption
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance											$ 28,628,368