Allowance for Credit Losses and Credit Quality Information (Nonaccrual) (Details) - USD ($)	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Financing Receivable, Nonaccrual [Line Items]
Uncollected accrued interest reversed	$ (26,521,837)	$ (36,532,245)
Financing receivable, nonaccrual	70,989,174	86,514,188
Interest income recognized	13,189,848	15,606,987	$ 12,657,746
Nonaccrual status
Financing Receivable, Nonaccrual [Line Items]
Unearned interest, insurance and fees	(24,405,895)	(32,158,640)
Tax Advance Loan
Financing Receivable, Nonaccrual [Line Items]
Financing receivable, nonaccrual	4,590	19,603
Interest income recognized	0	0	0
0 to 5 months
Financing Receivable, Nonaccrual [Line Items]
Uncollected accrued interest reversed	(5,337,159)	(9,280,329)
Financing receivable, nonaccrual	13,971,062	15,781,494
Interest income recognized	1,024,573	2,032,098	1,485,356
6 to 17 months
Financing Receivable, Nonaccrual [Line Items]
Uncollected accrued interest reversed	(3,251,451)	(5,790,516)
Financing receivable, nonaccrual	8,507,503	18,288,714
Interest income recognized	1,522,705	1,815,167	1,662,082
18 to 35 months
Financing Receivable, Nonaccrual [Line Items]
Uncollected accrued interest reversed	(3,381,665)	(4,673,972)
Financing receivable, nonaccrual	12,569,729	15,551,806
Interest income recognized	1,730,680	2,385,356	2,292,776
36 to 59 months
Financing Receivable, Nonaccrual [Line Items]
Uncollected accrued interest reversed	(4,055,663)	(4,596,229)
Financing receivable, nonaccrual	15,250,596	19,745,397
Interest income recognized	2,364,522	2,357,340	1,602,011
60+ Months
Financing Receivable, Nonaccrual [Line Items]
Uncollected accrued interest reversed	(10,495,899)	(12,191,199)
Financing receivable, nonaccrual	45,091,589	49,285,814
Interest income recognized	$ 6,547,368	$ 7,017,026	$ 5,615,521