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Fair Value Measurements Financial Instruments not Carried at Fair Value (Details) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2022
Dec. 31, 2021
Carrying (Reported) Amount, Fair Value Disclosure [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Policy loans $ 78,586 $ 80,307
Mortgage loans 1,052 1,148
Cash and cash equivalents 22,407 27,294
Annuity - investment contracts 65,616 64,384
Limited partnership 64,732 56,038
FHLB common stocks 192 192
All other investments 26 21
Other long-term investments 66,002 57,399
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Other Property    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Mortgage loans 1,000 1,000
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Single Family    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Mortgage loans 52 148
Estimate of Fair Value, Fair Value Disclosure [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Policy loans 78,586 80,307
Cash and Cash Equivalents, Fair Value Disclosure 22,407 27,294
Annuity - investment contracts 62,181 72,352
Estimate of Fair Value, Fair Value Disclosure [Member] | Other Property    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Mortgage loans 1,000 1,000
Estimate of Fair Value, Fair Value Disclosure [Member] | Single Family    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Mortgage loans 54 169
Policy loans 78,586 80,307
Cash and cash equivalents 22,407 27,294
Annuity - investment contracts $ 88,760 $ 83,918
Insurance policy loans interest rate 7.70% 7.70%
Fair value maximum rate of investment contract 3.99% 2.63%
Fair value minimum interest rate of investment contract 2.60% 0.50%
Limited partnership $ 64,732 $ 56,038
Other long-term investments $ 66,002 $ 57,399
Other Property    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Mortgage loans on real estate, interest rate 6.00%  
Mortgage loan maturity higher end range 1 year  
Single Family    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Mortgage loans on real estate, interest rate 7.00% 6.40%
Mortgage loan maturity higher end range 6 years  
Mortgage loans interest rate used to estimate fair value 6.25%