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Allowance for Credit Losses (Narratives) (Details) - USD ($) $ in Millions | 12 Months Ended |  |
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Mar. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Financing Receivable Allowance For Credit Loss Additional Information [Abstract] |  |  |
Reinsurance paid percentage of total assets | 1.00% |  |
Premiums Receivable Gross |  | $ 4.1 | $ 1.7
Commercial Real Estate Portfolio Segment [Member] |  |  |
Financing Receivable Allowance For Credit Loss Additional Information [Abstract] |  |  |
Modeling of mortgage loans | Loans that management has the intent and ability to hold for the foreseeable future, or until maturity or payoff, are reported at amortized cost. Modeling for the Company’s mortgage loans is based on inputs most highly correlated to defaults, including loan-to-value, occupancy, and payment history. Historical credit loss experience provides additional support for the estimation of expected credit losses. In assessing the credit losses, the portfolio is reviewed on a collective basis, using loan-specific cash flows to determine the fair value of the collateral in the event of default. Adjustments to this analysis are made to assess loans with a loan-to-value of 65% or greater. These loans are evaluated on an individual basis and loan specific risk characteristics such as occupancy levels, expense, income growth and other relevant available information from internal and external sources relating to past events, current conditions, and reasonable and supportable forecasts. |  |

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- Definition Ratio of insurance contracts that are subject to reinsurance participation to all contracts in force. + References No definition available. + Details
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- Definition Includes any additional disclosures related to the credit quality of financing receivables. This may include a description of a credit quality indicator or a description of how the internal risk ratings used by a company relate to the likelihood of loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 29 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953659-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 30 -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953664-111524 + Details
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- Definition Gross amount, as of the balance sheet date, due the entity from (a) agents and insureds, (b) uncollected premiums and (c) others, before deducting the allowance for doubtful accounts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.5) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 + Details
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