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Fair Value Measurements Financial Instruments not Carried at Fair Value (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2020
Dec. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Policy loans $ 83,962 $ 82,005
Short-term Investments 0 1,301
Cash and cash equivalents, at carrying value 42,261 46,205
Annuity - investment contracts $ 79,875 $ 76,380
Mortgage loans on real estate, interest rate 6.40% 6.40%
Mortgage loan maturity lower end range 8 years  
Mortgage loan maturity higher end range 20 years  
Mortgage loans interest rate used to estimate fair value 6.25%  
Insurance policy loans interest rate 7.70% 7.70%
Fair value minimum interest rate of investment contract 0.29% 1.67%
Fair value maximum rate of investment contract 2.44% 3.02%
Other long-term investments    
Private equity $ 10,503  
Other Long-term Investments 19,668 $ 385
Chief Executive Officer [Member]    
Other long-term investments    
Due to Officers or Stockholders, Current 8,800  
Carrying (Reported) Amount, Fair Value Disclosure [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Mortgage loans 158 177
Policy loans 83,962 82,005
Short-term Investments 0 1,301
Cash and cash equivalents, at carrying value 42,261 46,205
Annuity - investment contracts 60,582 56,878
Other long-term investments    
Private equity 10,503 0
FHLB common stocks 190 187
Mortgage loans 158 177
All other investments 8,817 21
Other Long-term Investments 19,668 385
Estimate of Fair Value, Fair Value Disclosure [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Mortgage loans 196 210
Policy loans 83,962 82,005
Short-term Investments 0 1,301
Cash and cash equivalents, fair value disclosure 42,261 46,205
Annuity - investment contracts 67,650 60,667
Other long-term investments    
Mortgage loans $ 196 $ 210