Allowance for Credit Losses and Credit Quality Information (Gross Loans Receivable By Customer Tenure) (Details) - USD ($)	Mar. 31, 2021	Apr. 01, 2020	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Financing Receivable, Recorded Investment [Line Items]
Gross loans receivable	$ 1,104,746,261		$ 1,209,871,366
Allowance for credit losses	91,722,288		$ 96,487,856	$ 81,519,624	$ 66,088,139
Accounting Standards Update 2016-13
Financing Receivable, Recorded Investment [Line Items]
Allowance for credit losses	28,600,000	$ 28,600,000
Tax Advance Loan
Financing Receivable, Recorded Investment [Line Items]
Gross loans receivable	8,316,011
Recency Basis
Financing Receivable, Recorded Investment [Line Items]
Gross loans receivable	1,104,746,261
Recency Basis | Tax Advance Loan
Financing Receivable, Recorded Investment [Line Items]
Gross loans receivable	8,316,011
0 to 5 months | Recency Basis
Financing Receivable, Recorded Investment [Line Items]
Gross loans receivable	92,378,094
0 to 5 months | Recency Basis | 30-60 days past due
Financing Receivable, Recorded Investment [Line Items]
Gross loans receivable	92,378,097
6 to 17 months | Recency Basis
Financing Receivable, Recorded Investment [Line Items]
Gross loans receivable	106,742,122
6 to 17 months | Recency Basis | 30-60 days past due
Financing Receivable, Recorded Investment [Line Items]
Gross loans receivable	106,742,121
18 to 35 months | Recency Basis
Financing Receivable, Recorded Investment [Line Items]
Gross loans receivable	169,361,911
18 to 35 months | Recency Basis | 30-60 days past due
Financing Receivable, Recorded Investment [Line Items]
Gross loans receivable	169,361,910
36 to 59 months | Recency Basis
Financing Receivable, Recorded Investment [Line Items]
Gross loans receivable	130,655,627
36 to 59 months | Recency Basis | 30-60 days past due
Financing Receivable, Recorded Investment [Line Items]
Gross loans receivable	130,655,627
60+ Months | Recency Basis
Financing Receivable, Recorded Investment [Line Items]
Gross loans receivable	597,292,496
60+ Months | Recency Basis | 30-60 days past due
Financing Receivable, Recorded Investment [Line Items]
Gross loans receivable	$ 597,292,495