Commercial Mortgage Loans - Summary (Details) - Commercial mortgage loans - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Cost	$ 18,641	$ 7,674
Unpaid principal balance	18,698	7,756
Net discount on mortgage loans purchased	(51)	(82)
Change in fair value	17	(208)
Fair value	$ 18,664	$ 7,466
Weighted average interest rate (as a percent)	6.25%	6.58%
Weighted average remaining maturity (years)	8 years	14 years

Financing Receivable, After Allowance for Credit Loss, Before Fair Value Option Adjustment, Unpaid Principal Balance

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- Definition

Financing Receivable, at Cost

+ References

No definition available.

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- Definition

Financing Receivable, Weighted Average Interest Rate

+ References

No definition available.

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- Definition

Financing Receivable, Weighted Average Remaining Maturity

+ References

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- References

No definition available.

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- Definition

This item represents the difference between the aggregate fair value and the aggregate unpaid principal balance of loans and long-term receivables (other than securities categorized as trading, available-for-sale or held-to-maturity) that have contractual principal amounts and for which the fair value option has been elected.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
-Subparagraph (d)(1)
-URI http://asc.fasb.org/extlink&oid=123596393&loc=d3e14064-108612

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- Definition

Amount of unamortized purchase premium (discount) on financing receivable. Excludes financing receivable covered under loss sharing agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6378536&loc=d3e10092-111533

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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-Subparagraph (SX 210.5-02(3))
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