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INVESTMENTS - Mortgage Loans (Details)	Mar. 31, 2023 USD ($) loan	Dec. 31, 2022 USD ($)	Mar. 31, 2022
Mortgage loans, held for investment:
Commercial	$ 636,370,000	$ 627,437,000
Commercial (as a percent)	100.00%	100.00%
Allowance for expected credit losses	$ (1,900,000)	$ 0
Allowance for expected credit losses (as a percent)	0.00%	0.00%
Total mortgage loans, held for investment	$ 634,470,000	$ 627,437,000
Total mortgage loans, held-for investment (as a percent)	100.00%	100.00%
Weighted average debt service coverage ratios	2.2		2.3
Weighted average loan-to-value ratios (as a percent)	60.00%		60.00%
Commercial mortgage loans, past due amount	$ 0	$ 0
Number of collateral dependent loan | loan	1
Allowance for expected credit losses	$ 1,900,000	$ 0

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Loans Held For Investment, Commercial, Percent

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This item represents the amortized cost of commercial mortgage loans held for investments that are past due.

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Mortgage Loans, Held for Investment, Percentage of Total

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Number Of Collateral Dependent Loan

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Total Mortgage Loans Held-For-Investment, Percent

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Weighted Average Debt Service Coverage Ratios

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Weighted average loan-to-value ratios

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- Definition

The reserve to cover probable credit losses related to specifically identified fixed maturity real estate loans as well as probable credit losses inherent in the remainder of that loan portfolio.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 310
-Section 45
-Paragraph 4
-URI https://asc.fasb.org/extlink&oid=123605502&loc=d3e21338-158488

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- Definition

Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

+ 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)
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919230-210447

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 3B
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL120267963-210447

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- Definition

The balance represents the amount of loans that are secured by real estate mortgages, offset by the reserve to cover probable credit losses on the loan portfolio.

+ 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
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-URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910

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