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Loans Receivable and Other Lending Investments, net (Credit Characteristics by Payment Status) (Details) - Commercial Portfolio Segment - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Recorded investment in loans, aged by payment status and presented by class |  |
Total | $ 212,683 | $ 582,962
Past Due |  |
Recorded investment in loans, aged by payment status and presented by class |  |
Total | 59,640 | 85,447
Greater Than 90 Days |  |
Recorded investment in loans, aged by payment status and presented by class |  |
Total | 59,640 | 0
Less Than and Equal to 90 Days |  |
Recorded investment in loans, aged by payment status and presented by class |  |
Total | 0 | 85,447
Current |  |
Recorded investment in loans, aged by payment status and presented by class |  |
Total | 153,043 | 497,515
Senior mortgages |  |
Recorded investment in loans, aged by payment status and presented by class |  |
Total | 199,608 | 485,655
Senior mortgages | Past Due |  |
Recorded investment in loans, aged by payment status and presented by class |  |
Total | 59,640 | 42,501
Senior mortgages | Greater Than 90 Days |  |
Recorded investment in loans, aged by payment status and presented by class |  |
Total | 59,640 | 0
Senior mortgages | Less Than and Equal to 90 Days |  |
Recorded investment in loans, aged by payment status and presented by class |  |
Total | 0 | 42,501
Senior mortgages | Current |  |
Recorded investment in loans, aged by payment status and presented by class |  |
Total | 139,968 | 443,154
Corporate/Partnership loans |  |
Recorded investment in loans, aged by payment status and presented by class |  |
Total | 618 | 85,667
Corporate/Partnership loans | Past Due |  |
Recorded investment in loans, aged by payment status and presented by class |  |
Total | 0 | 42,946
Corporate/Partnership loans | Greater Than 90 Days |  |
Recorded investment in loans, aged by payment status and presented by class |  |
Total | 0 | 0
Corporate/Partnership loans | Less Than and Equal to 90 Days |  |
Recorded investment in loans, aged by payment status and presented by class |  |
Total | 0 | 42,946
Corporate/Partnership loans | Current |  |
Recorded investment in loans, aged by payment status and presented by class |  |
Total | 618 | 42,721
Subordinate mortgages |  |
Recorded investment in loans, aged by payment status and presented by class |  |
Total | 12,457 | 11,640
Subordinate mortgages | Past Due |  |
Recorded investment in loans, aged by payment status and presented by class |  |
Total | 0 | 0
Subordinate mortgages | Greater Than 90 Days |  |
Recorded investment in loans, aged by payment status and presented by class |  |
Total | 0 | 0
Subordinate mortgages | Less Than and Equal to 90 Days |  |
Recorded investment in loans, aged by payment status and presented by class |  |
Total | 0 | 0
Subordinate mortgages | Current |  |
Recorded investment in loans, aged by payment status and presented by class |  |
Total | $ 12,457 | $ 11,640

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