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Loans Receivable and Other Lending Investments, net (Securities) (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract] |  |
Total | $ 21,240 |
Estimated Fair Value | 21,666 |
Held-to-Maturity Securities, Debt Maturities [Abstract] |  |
Total | 58,250 |
Estimated Fair Value | 61,003 |
Investments, Debt and Equity Securities [Abstract] |  |
Face Value | 79,694 | $ 55,559
Amortized Cost Basis | 79,490 | 62,138
Net Unrealized Gain (Loss) | 3,179 | 222
Estimated Fair Value | 82,669 | 62,360
Net Carrying Value | 79,916 | 62,289
Municipal Bonds |  |
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract] |  |
Face Value | 21,240 | 1,010
Total | 21,240 | 1,010
Net Unrealized Gain (Loss) | 426 | 151
Estimated Fair Value | 21,666 | 1,161
Net Carrying Value | 21,666 | 1,161
Corporate Debt Securities |  |
Held-to-Maturity Securities, Debt Maturities [Abstract] |  |
Face Value | 58,454 | 54,549
Total | 58,250 | 61,128
Net Unrealized Gain (Loss) | 2,753 | 71
Estimated Fair Value | 61,003 | 61,199
Net Carrying Value | $ 58,250 | $ 61,128

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