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Loans Receivable and Other Lending Investments, Net (Impaired Loans) (Details)	3 Months Ended	12 Months Ended
	Dec. 31, 2020 USD ($)	Dec. 31, 2022 USD ($) loan	Dec. 31, 2021 USD ($) loan	Dec. 31, 2020 USD ($)
Financing Receivable, Impaired [Line Items]
(Recovery of) provision for loan losses		$ 44,998,000	$ (8,085,000)	$ 8,866,000
Impaired Loans
Number of non accrual loans | loan		1	1
Interest income on Impaired loans		$ 0	$ 0	0
Nonperforming Financial Instruments
Financing Receivable, Impaired [Line Items]
Carrying value of loans		29,100,000
Nonperforming Financial Instruments | Senior mortgages
Financing Receivable, Impaired [Line Items]
Carrying value of loans	$ 15,200,000			15,200,000
Proceeds from collection of loan receivable	11,000,000.0
(Recovery of) provision for loan losses	$ 4,200,000
Commercial Portfolio Segment
Impaired Loans
Amortized Cost		29,493,000	59,640,000
Unpaid Principal Balance		29,358,000	58,888,000
Related Allowance		(396,000)	(576,000)
Impaired loans, average recorded investment, total		45,032,000	57,853,000	50,205,000
Impaired loans, interest income recognized, total		0	0	2,145,000
Commercial Portfolio Segment | Senior mortgages
Impaired Loans
Amortized Cost		29,493,000	59,640,000
Unpaid Principal Balance		29,358,000	58,888,000
Related Allowance		(396,000)	(576,000)
Impaired loans, average recorded investment, total		45,032,000	57,853,000	50,205,000
Impaired loans, interest income recognized, total		$ 0	$ 0	$ 2,145,000

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Average 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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Amount of interest income on financing receivables, for which there is a related allowance for credit losses, recognized on a cash-basis method of accounting that the financing receivables were impaired.

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Amount of investment in impaired financing receivables for which there is a related allowance for credit losses.

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Impaired Financing Receivable [Abstract]

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The interest income recognized on a cash-basis or accrual method of accounting during the time within that period that the financing receivables were impaired.

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Reflects the aggregate gross carrying amount of all categories of loans held in portfolio, after deducting deferred income, but before deducting the allowance for losses on loans.

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Number Of Non Accrual Loans

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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.

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Amount of allowance for credit losses related to recorded investment.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Section 50
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Unpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.

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The cash inflow associated with the collection, including prepayments, of loans receivable issued for financing of goods and services.

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

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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-Topic 326
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