Investments - Commercial Mortgage Loan Participations, Allowance for Credit Loss (Details) $ in Thousands	12 Months Ended
Dec. 31, 2021 USD ($) loan	Dec. 31, 2020 USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in allowance	$ (2,700)
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses beginning balance	3,505
Allowance for credit losses ending balance	$ 827	$ 3,505
Commercial mortgage participations
Financing Receivable, Allowance for Credit Loss [Line Items]
Number of loans \| loan	22
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses beginning balance	$ 3,505	0
Provision (reversal) for credit losses	(2,678)	3,170
Allowance for credit losses ending balance	827	3,505
Commercial mortgage participations \| Cumulative Effect, Period Of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses beginning balance	$ 0	335
Allowance for credit losses ending balance		$ 0

Financing Receivable, Number Of Loans

No definition available.

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- Definition

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

+ References

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+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount of increase (decrease) in allowance for credit loss on financing receivable.

+ References

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

Amount of credit loss expense (reversal of expense) for financing receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
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