Income Taxes (Deferred Tax Assets and Liabilities) (Details) - USD ($)	Mar. 31, 2021	Mar. 31, 2020
Deferred tax assets:
Allowance for credit losses	$ 22,908,670	$ 23,900,236
Unearned insurance commissions	10,080,766	9,964,655
Accrued expenses primarily related to employee benefits	13,676,701	12,730,245
Reserve for uncollectible interest	645,113	1,205,082
Lease liability	22,231,591	25,309,841
Foreign tax credit carryforward	3,254,926	3,254,926
Capital loss carryforward	7,928,184	7,784,059
State net operating loss carryforwards	78,358	387,558
Gross deferred tax assets	80,804,309	84,536,602
Less valuation allowance	(11,184,384)	(11,040,259)
Net deferred tax assets	69,619,925	73,496,343
Deferred tax liabilities:
Fair value adjustment for loans receivable	(12,362,590)	(14,065,135)
Property and equipment	(5,902,421)	(5,097,147)
Intangible assets	(243,574)	(925,319)
Deferred net loan origination costs	(1,268,653)	(1,664,486)
Prepaid expenses	(1,412,337)	(1,185,759)
Right-of-use asset	(21,826,178)	(25,045,690)
Other	(1,611,430)	(2,254,822)
Gross deferred tax liabilities	(44,627,183)	(50,238,358)
Deferred income taxes, net	$ 24,992,742	$ 23,257,985