Commitments and Contingencies (Details)						3 Months Ended
	May 10, 2022 USD ($)	Mar. 04, 2022 USD ($)	Feb. 11, 2022 USD ($)	Nov. 11, 2019 USD ($)	Jul. 27, 2019 USD ($)	Sep. 30, 2020 class_action_suit	Jun. 30, 2023 USD ($)	Dec. 31, 2021 USD ($)	Apr. 30, 2019 USD ($)
Revolving Credit Facility
Loss Contingencies [Line Items]
Other commitment							$ 1,200,000
New Loans
Loss Contingencies [Line Items]
Other commitment							5,000,000
Existing Loans
Loss Contingencies [Line Items]
Other commitment							31,900,000
Capital Contributions to Investment Funds
Loss Contingencies [Line Items]
Other commitment							196,000,000
Private Placement
Loss Contingencies [Line Items]
Other commitment							$ 0
Tax Status Of Companys International Life Insurance Products Member | Internal Revenue Service (IRS)
Loss Contingencies [Line Items]
Accrued settlement amount			$ 4,900,000
Payment remittance period after agreement effective date			60 days
Period within which to make the stipulated adjustments after agreement effective date			90 days
Williams v Pantaleoni et al
Loss Contingencies [Line Items]
Equity indexed annuity									$ 100,000
Punitive damages reversed		$ 2,500,000
Williams v Pantaleoni et al | Economic Damages
Loss Contingencies [Line Items]
Loss contingency, damages awarded	$ 14,949	14,949
Punitive damages reversed	2,500,000
Williams v Pantaleoni et al | Non-Economic Damages
Loss Contingencies [Line Items]
Loss contingency, damages awarded	420,000	420,000
Williams v Pantaleoni et al | Plaintiff Attorney's Fees
Loss Contingencies [Line Items]
Loss contingency, damages awarded	1,260,000	$ 1,260,000
Williams v Pantaleoni et al | Appellate Costs
Loss Contingencies [Line Items]
Loss contingency, damages awarded	538,461
Williams v Pantaleoni et al | Reduced Plaintiff Attorney's Fees
Loss Contingencies [Line Items]
Loss contingency, damages awarded	$ 842,380
Mildred Baldwin, on behalf of herself and others similarly situated vs. National Western Life Insurance Company
Loss Contingencies [Line Items]
Number of proposed claims | class_action_suit						2
Accrued settlement amount								$ 4,400,000
Judicial Ruling | Williams v Pantaleoni et al | Economic Damages
Loss Contingencies [Line Items]
Loss contingency, damages awarded					$ 14,949
Judicial Ruling | Williams v Pantaleoni et al | Non-Economic Damages
Loss Contingencies [Line Items]
Loss contingency, damages awarded					$ 2,900,000
Judicial Ruling | Williams v Pantaleoni et al | Plaintiff Attorney's Fees
Loss Contingencies [Line Items]
Loss contingency, damages awarded				$ 1,260,000