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Policyholders' Liabilities - Liability for Future Policy Benefits, Revenue and Interest Expense (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Life Insurance |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Liability for Future Policy Benefit, Gross Premium Income | $ 122,145 | $ 124,653 | $ 126,058
Liability for Future Policy Benefit, Interest Expense | 42,907 | 43,379 | 43,398
Home Service Insurance Segment [Member] |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Liability for Future Policy Benefit, Gross Premium Income | 44,101 | 44,211 | 44,993
Liability for Future Policy Benefit, Interest Expense | 11,682 | 11,555 | 11,634
Life Insurance, Permanent |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Liability for Future Policy Benefit, Gross Premium Income | 93,917 | 94,905 | 96,766
Liability for Future Policy Benefit, Interest Expense | 33,984 | 34,165 | 34,067
Life Insurance, Permanent Limited Pay |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Liability for Future Policy Benefit, Gross Premium Income | 16,396 | 15,023 | 13,678
Liability for Future Policy Benefit, Interest Expense | 8,923 | 9,214 | 9,331
Life Insurance, Other |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Liability for Future Policy Benefit, Gross Premium Income | 12,813 | 16,047 | 16,856
Liability for Future Policy Benefit, Interest Expense | 0 | 0 | 0
Life Insurance, Reinsurance |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Liability for Future Policy Benefit Gross Premium Income, Reinsurance | 1,702 | 1,819 | 1,742
Liability for Future Policy Benefit, Interest Expense | 0 | 0 | 0
Life Insurance, Net of Reinsurance |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Liability for Future Policy Benefit, Gross Premium Income | 121,424 | 124,156 | 125,558
Liability for Future Policy Benefit, Interest Expense | 42,907 | 43,379 | 43,398
Life Insurance, Accident And Health, Other |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Liability for Future Policy Benefit, Gross Premium Income | 725 | 502 | 505
Liability for Future Policy Benefit, Interest Expense | 0 | 0 | 0
Life Insurance, Accident And Health, Reinsurance |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Liability for Future Policy Benefit Gross Premium Income, Reinsurance | 4 | 5 | 5
Liability for Future Policy Benefit, Interest Expense | 0 | 0 | 0
Life Insurance, Accident And Health, Net Of Reinsurance |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Liability for Future Policy Benefit, Gross Premium Income | 721 | 497 | 500
Liability for Future Policy Benefit, Interest Expense | 0 | 0 | 0
Home Service Insurance, Life Insurance, Permanent |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Liability for Future Policy Benefit, Gross Premium Income | 33,263 | 33,312 | 33,706
Liability for Future Policy Benefit, Interest Expense | 5,294 | 5,300 | 5,447
Home Service Insurance, Life Insurance, Permanent Limited Pay |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Liability for Future Policy Benefit, Gross Premium Income | 8,576 | 8,396 | 8,324
Liability for Future Policy Benefit, Interest Expense | 6,388 | 6,255 | 6,187
Home Service Insurance, Life Insurance, Other |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Liability for Future Policy Benefit, Gross Premium Income | 1,371 | 1,749 | 2,236
Liability for Future Policy Benefit, Interest Expense | 0 | 0 | 0
Home Service Insurance, Life Insurance, Reinsurance |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Liability for Future Policy Benefit Gross Premium Income, Reinsurance | 25 | 27 | 23
Liability for Future Policy Benefit, Interest Expense | 0 | 0 | 0
Home Service Insurance, Life Insurance, Net of Reinsurance |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Liability for Future Policy Benefit, Gross Premium Income | 43,185 | 43,430 | 44,243
Liability for Future Policy Benefit, Interest Expense | 11,682 | 11,555 | 11,634
Home Service Insurance, Accident And Health, Other |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Liability for Future Policy Benefit, Gross Premium Income | 916 | 781 | 750
Liability for Future Policy Benefit, Interest Expense | $ 0 | $ 0 | $ 0

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