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INVESTMENTS - Mortgage loans (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Mortgage loans held for investment:
Commercial	$ 594,088,000	$ 593,290,000
Total mortgage loans held for investment	$ 594,088,000	$ 593,290,000
Commercial, percent	100.00%	100.00%
Total mortgage loans held for investment, percent	100.00%	100.00%
Debt service coverage ratio, in excess of	2.5	2.4
Loan-to-value ratio, percent (less than)	60.00%	60.00%
Credit losses on commercial mortgage loans	$ 0	$ 0

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Loans Held For Investment, Commercial, Percent

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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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Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

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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.

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Amount, before allowance for credit loss, of financing receivable.

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