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Loans Receivable and Other Lending Investments, net (Securities) (Details) - USD ($) $ in Thousands | Mar. 31, 2017 | Dec. 31, 2016
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Investments, Debt and Equity Securities [Abstract] |  |
Face Value | $ 81,097 | $ 79,694
Amortized Cost Basis | 80,972 | 79,490
Net Unrealized Gain (Loss) | 2,730 | 3,179
Estimated Fair Value | 83,702 | 82,669
Net Carrying Value | 81,381 | 79,916
Municipal debt securities |  |
Available-for-Sale Securities |  |
Face Value | 21,230 | 21,240
Amortized Cost Basis | 21,230 | 21,240
Net Unrealized Gain (Loss) | 409 | 426
Estimated Fair Value | 21,639 | 21,666
Net Carrying Value | 21,639 | 21,666
Debt securities |  |
Held-to-Maturity Securities |  |
Face Value | 59,867 | 58,454
Amortized Cost Basis | 59,742 | 58,250
Net Unrealized Gain (Loss) | 2,321 | 2,753
Estimated Fair Value | 62,063 | 61,003
Net Carrying Value | $ 59,742 | $ 58,250

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