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Loans Receivable and Other Lending Investments, net - Other Lending Investments (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Available-for-Sale Securities |  |
Amortized Cost Basis | $ 20,680 |
Estimated Fair Value | 24,631 |
Held-to-Maturity Securities |  |
Amortized Cost Basis | 89,234 |
Estimated Fair Value | 89,234 |
Total Other Lending Investments |  |
Face Value | 120,680 | $ 121,140
Amortized Cost Basis | 109,914 | 106,121
Net Unrealized Gain | 3,951 | 2,756
Estimated Fair Value | 113,865 | 108,877
Net Carrying Value | 113,865 | 108,877
Municipal debt securities |  |
Available-for-Sale Securities |  |
Face Value | 20,680 | 21,140
Amortized Cost Basis | 20,680 | 21,140
Net Unrealized Gain | 3,951 | 2,756
Estimated Fair Value | 24,631 | 23,896
Net Carrying Value | 24,631 | 23,896
Debt securities |  |
Held-to-Maturity Securities |  |
Face Value | 100,000 | 100,000
Amortized Cost Basis | 89,234 | 84,981
Net Unrealized Gain | 0 | 0
Estimated Fair Value | 89,234 | 84,981
Net Carrying Value | $ 89,234 | $ 84,981

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