Allowance for Credit Losses and Credit Quality Information (Nonaccrual) (Details) - USD ($)	12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2021
Financing Receivable, Nonaccrual [Line Items]
Uncollected accrued interest reversed	$ 36,500,000	$ 30,600,000
Financing receivable, nonaccrual	86,514,188	105,649,311
Interest Income Recognized	15,606,987	12,657,746	$ 14,690,456
Nonaccrual status
Financing Receivable, Nonaccrual [Line Items]
Unearned interest, insurance and fees	(32,158,640)	(38,026,011)
Tax Advance Loan
Financing Receivable, Nonaccrual [Line Items]
Financing receivable, nonaccrual	19,603	25,249
Interest Income Recognized	0	0	0
0 to 5 months
Financing Receivable, Nonaccrual [Line Items]
Financing receivable, nonaccrual	15,781,494	45,227,510
Interest Income Recognized	2,032,098	1,485,356	1,705,371
6 to 17 months
Financing Receivable, Nonaccrual [Line Items]
Financing receivable, nonaccrual	18,288,714	15,879,250
Interest Income Recognized	1,815,167	1,662,082	2,433,144
18 to 35 months
Financing Receivable, Nonaccrual [Line Items]
Financing receivable, nonaccrual	15,551,806	20,745,106
Interest Income Recognized	2,385,356	2,292,776	2,195,160
36 to 59 months
Financing Receivable, Nonaccrual [Line Items]
Financing receivable, nonaccrual	19,175,410	14,232,388
Interest Income Recognized	2,326,640	1,602,011	1,609,059
60+ Months
Financing Receivable, Nonaccrual [Line Items]
Financing receivable, nonaccrual	49,855,801	47,565,819
Interest Income Recognized	$ 7,047,726	$ 5,615,521	$ 6,747,722