Loans Receivable (Summary of Impaired Loans) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Summary of loan impairments
Balance of deteriorated loans at end of year	$ 242,319	$ 188,018	$ 189,272
Allowance for credit losses	(212,514)	(68,372)	(68,372)
Balance of deteriorated loans not reserved	29,805	119,646	120,900
Interest recognized on impaired loans	18,937	16,235	17,241
Financing Receivable, Nonaccrual	$ 3,623	$ 2,534	$ 2,567

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.

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Amount of financing receivable on nonaccrual status.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

+ References

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-Publisher FASB
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Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

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Reflects the carrying amount of loans which have been written down and for which there is no related reserve for credit loss.

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