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Loans Receivable and Other Lending Investments, net (Schedule of Loans Receivable) (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | --- | --- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Other lending investments |  | $ 58,254 |  | $ 124,930 |  |  |
Total gross carrying value of loans receivable and other lending investments |  | 207,285 |  | 337,613 |  |  |
Allowance for loan losses |  | (3,033) |  | (4,769) |  |  |
Total loans receivable and other lending investments, net | [1] | 204,252 |  | 332,844 |  |  |
Held-to-maturity debt securities |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Other lending investments |  | 35,000 |  | 96,838 |  |  |
Available-for-sale debt securities |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Other lending investments |  | 23,254 |  | 28,092 |  |  |
Commercial Portfolio Segment |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Subtotal - gross carrying value of loans |  | 149,031 |  | 212,683 |  |  |
Commercial Portfolio Segment | Senior mortgages |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Subtotal - gross carrying value of loans |  | 136,145 |  | 199,608 |  |  |
Commercial Portfolio Segment | Corporate/Partnership loans |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Subtotal - gross carrying value of loans |  |  |  | 618 |  |  |
Commercial Portfolio Segment | Subordinate mortgages |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Subtotal - gross carrying value of loans |  | 12,886 |  | 12,457 |  |  |
Construction Loans |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Subtotal - gross carrying value of loans |  | 133,555 |  | 185,261 |  |  |
Allowance for loan losses |  | (861) | $ (1,252) | (1,213) | $ (1,640) | $ (2,893) | $ (6,541)
Construction Loans | Commercial Portfolio Segment |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Subtotal - gross carrying value of loans |  | 133,555 |  | 185,261 |  |  |
Construction Loans | Commercial Portfolio Segment | Senior mortgages |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Subtotal - gross carrying value of loans |  | 133,555 |  | 184,643 |  |  |
Construction Loans | Commercial Portfolio Segment | Corporate/Partnership loans |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Subtotal - gross carrying value of loans |  | $ 0 |  | 618 |  |  |
Completed construction | Commercial Portfolio Segment |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Percentage of construction loans |  | 100.00% |  |  |  |  |
Loans |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Subtotal - gross carrying value of loans |  | $ 15,476 |  | 27,422 |  |  |
Allowance for loan losses |  | (450) | $ (674) | (676) | $ (1,619) | $ (1,815) | $ (1,643)
Loans | Commercial Portfolio Segment | Senior mortgages |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Subtotal - gross carrying value of loans |  | 2,590 |  | 14,965 |  |  |
Loans | Commercial Portfolio Segment | Subordinate mortgages |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Subtotal - gross carrying value of loans |  | $ 12,886 |  | $ 12,457 |  |  |
[1] | Refer to Note 2 for details on the Company’s consolidated variable interest entities (“VIEs”).

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