Commitments and Contingencies (Details) - USD ($)	Nov. 11, 2019	Jul. 27, 2019	Nov. 11, 2018	Sep. 30, 2020	Apr. 30, 2019
New Loans
Loss Contingencies [Line Items]
Other commitment				$ 0
Existing Loans
Loss Contingencies [Line Items]
Other commitment				7,200,000
Capital Contributions to Investment Funds
Loss Contingencies [Line Items]
Other commitment				$ 52,200,000
Williams v Pantaleoni et al
Loss Contingencies [Line Items]
Equity indexed annuity					$ 100,000
Loss contingency, compensatory damages awarded		$ 14,949
Loss contingency, punitive damages awarded		$ 2,900,000
Loss contingency, damages sought	$ 1,300,000
Settled Litigation | National Western Life Insurance Company and National Western Life Group, Inc. v. Ross Rankin Moody et. al
Loss Contingencies [Line Items]
Loss contingency, damages awarded			$ 1,314,054