Deposits with Regulatory Authorities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Schedule of Deposit with Regulatory Authorities [Line Items]
Assets deposited with state and other regulatory authorities	$ 19,222	$ 19,101
National Western:
Schedule of Deposit with Regulatory Authorities [Line Items]
Assets deposited with state and other regulatory authorities	15,854	15,782
National Western: | Debt securities available-for-sale
Schedule of Deposit with Regulatory Authorities [Line Items]
Assets deposited with state and other regulatory authorities	15,379	15,307
National Western: | Short-term investments
Schedule of Deposit with Regulatory Authorities [Line Items]
Assets deposited with state and other regulatory authorities	475	475
Ozark National:
Schedule of Deposit with Regulatory Authorities [Line Items]
Assets deposited with state and other regulatory authorities	3,368	3,319
Ozark National: | Debt securities available-for-sale
Schedule of Deposit with Regulatory Authorities [Line Items]
Assets deposited with state and other regulatory authorities	$ 3,368	$ 3,319