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Investments, Aggregated by Type and Industry (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Investments aggregated by type and industry [Abstract]    
Estimated fair value $ 260,986 $ 254,106
Gross unrealized gains 23,106 31,739
Gross unrealized losses 717 94
Amortized cost total 238,597 222,461
Estimated fair value 19,124 18,716
Gross unrealized gains 14,217 12,323
Gross unrealized losses 0 0
Cost 4,907 6,393
Amortized cost of bonds on deposit with insurance regulatory authorities 11,169 10,670
Amortized cost pledged as collateral to FHLB 5,371 1,997
Fixed Maturities [Member] | U.S. Treasury Securities and Obligations of U.S. Government Agencies and Authorities [Member]    
Investments aggregated by type and industry [Abstract]    
Estimated fair value 50,298 30,762
Gross unrealized gains 763 1,381
Gross unrealized losses 416 26
Amortized cost total 49,951 29,407
Fixed Maturities [Member] | Obligations of States and Political Subdivisions [Member]    
Investments aggregated by type and industry [Abstract]    
Estimated fair value 11,644 11,802
Gross unrealized gains 749 898
Gross unrealized losses 0 0
Amortized cost total 10,895 10,904
Fixed Maturities [Member] | Corporate Securities [Member]    
Investments aggregated by type and industry [Abstract]    
Estimated fair value 198,794 211,292
Gross unrealized gains 21,536 29,402
Gross unrealized losses 301 68
Amortized cost total 177,559 181,958
Fixed Maturities [Member] | Corporate Securities [Member] | Utilities and Telecom [Member]    
Investments aggregated by type and industry [Abstract]    
Estimated fair value 29,717 30,359
Gross unrealized gains 2,961 4,423
Gross unrealized losses 44 0
Amortized cost total 26,800 25,936
Fixed Maturities [Member] | Corporate Securities [Member] | Financial Services [Member]    
Investments aggregated by type and industry [Abstract]    
Estimated fair value 70,921 78,258
Gross unrealized gains 6,759 9,811
Gross unrealized losses 48 6
Amortized cost total 64,210 68,453
Fixed Maturities [Member] | Corporate Securities [Member] | Other Business - Diversified [Member]    
Investments aggregated by type and industry [Abstract]    
Estimated fair value 40,216 41,145
Gross unrealized gains 4,631 5,689
Gross unrealized losses 106 15
Amortized cost total 35,691 35,471
Fixed Maturities [Member] | Corporate Securities [Member] | Other Consumer - Diversified [Member]    
Investments aggregated by type and industry [Abstract]    
Estimated fair value 57,940 61,530
Gross unrealized gains 7,185 9,479
Gross unrealized losses 103 47
Amortized cost total 50,858 52,098
Fixed Maturities [Member] | Redeemable Preferred Stocks [Member]    
Investments aggregated by type and industry [Abstract]    
Estimated fair value 250 250
Gross unrealized gains 58 58
Gross unrealized losses 0 0
Amortized cost total 192 192
Fixed Maturities [Member] | Redeemable Preferred Stocks [Member] | Other Consumer - Diversified [Member]    
Investments aggregated by type and industry [Abstract]    
Estimated fair value 250 250
Gross unrealized gains 58 58
Gross unrealized losses 0 0
Amortized cost total 192 192
Equity Securities [Member] | Common and Non-redeemable Preferred Stocks [Member] | Financial Services [Member]    
Investments aggregated by type and industry [Abstract]    
Estimated fair value 799 2,111
Gross unrealized gains 525 351
Gross unrealized losses 0 0
Cost 274 1,760
Equity Securities [Member] | Common and Non-redeemable Preferred Stocks [Member] | Other Business - Diversified [Member]    
Investments aggregated by type and industry [Abstract]    
Estimated fair value 18,325 16,605
Gross unrealized gains 13,692 11,972
Gross unrealized losses 0 0
Cost $ 4,633 $ 4,633