CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2021
Cash flow from operating activities:
Net income	$ 21,231,990	$ 53,919,837	$ 88,282,828
Adjustments to reconcile net income to net cash provided by operating activities:
Loss on assets held for sale	0	38,633	37,579
Amortization of intangible assets	4,466,535	5,010,275	5,474,240
Amortization of historic tax credits	0	3,930,753	1,736,384
Accrued unearned interest	3,213,737	(9,032,020)	9,698,671
Gain on extinguishment of senior unsecured notes payable	(1,831,277)	0	0
Amortization of deferred loan costs	15,526,336	16,911,599	17,101,722
Amortization of debt issuance costs	1,654,916	1,095,325	659,292
Provision for credit losses	259,463,199	186,207,341	86,244,714
Depreciation	6,239,266	6,253,175	6,537,957
Amortization of finance leases	204,552	407,624	407,624
Gain on asset acquisition, net of income tax	(3,993,168)	0	0
Loss on sale of property and equipment	11,837	419,975	2,812,404
Deferred income tax expense (benefit)	(2,102,085)	(14,808,715)	5,651,362
Compensation related to stock option and restricted stock plans, net of taxes and adjustments	9,052,835	17,582,995	19,281,278
Gain on sale of loans receivable	0	0	(24,667)
Gain on company-owned life insurance	(104,113)	(106,885)	(1,064,897)
Change in accounts:
Other assets, net	(9,147,152)	(8,193,529)	(4,234,933)
Income taxes payable and receivable	(4,851,403)	(4,191,692)	6,610,559
Accounts payable and accrued expenses	(7,482,219)	17,001,850	(18,258,393)
Net cash provided by operating activities	291,553,786	272,446,541	226,953,724
Cash flows from investing activities:
Increase in loans receivable, net	(152,154,050)	(436,311,573)	(56,143,765)
Cash paid for acquisitions, primarily loans	(23,131,758)	(10,859,984)	(19,774,252)
Purchases of property and equipment	(5,827,773)	(6,070,414)	(11,683,858)
Proceeds from sale of property and equipment	529,781	245,935	346,943
Proceeds from the sale of assets held for sale	0	1,104,895	2,810,391
Proceeds from the sale of loans receivable	0	0	449,327
Proceeds from company-owned life insurance	0	0	1,997,279
Net cash used in investing activities	(180,583,800)	(451,891,141)	(81,997,935)
Cash flow from financing activities:
Borrowings from senior notes payable	313,862,948	515,315,246	310,984,250
Payments on senior notes payable	(402,924,870)	(523,350,000)	(357,076,750)
Payments for extinguished senior unsecured notes payable	(7,171,700)	0	0
Issuance of senior unsecured notes payable	0	300,000,000	0
Debt issuance costs associated with senior unsecured notes payable	(19,656)	(5,119,647)	0
Payments for debt extinguishment costs	(22,850)	0	0
Debt issuance costs associated with senior notes payable	(1,139,008)	0	(784,250)
Proceeds from exercise of stock options	654,920	12,805,646	12,268,554
Payments for taxes related to net share settlement of equity awards	(2,543,001)	(5,072,230)	(3,173,735)
Repurchase of common stock	(14,314,089)	(111,139,261)	(102,452,302)
Repayment of finance lease	(80,067)	(505,286)	(594,024)
Net cash provided by (used in) financing activities	(113,697,373)	182,934,468	(140,828,257)
Net change in cash and cash equivalents	(2,727,387)	3,489,868	4,127,532
Cash and cash equivalents at beginning of year	19,236,322	15,746,454	11,618,922
Cash and cash equivalents at end of year	16,508,935	19,236,322	15,746,454
Supplemental Disclosures:
Interest paid during the year	51,761,768	21,318,911	24,993,898
Income taxes paid during the year	10,783,143	30,941,852	14,857,555
Finance lease right-of-use assets, net transferred to property and equipment, net	$ 402,960	$ 0	$ 0