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Loans Receivable and Other Lending Investments, net (Securities) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Amortized Cost Basis	$ 21,140
Estimated Fair Value	23,896
Held-to-Maturity Securities, Debt Maturities [Abstract]
Amortized Cost Basis	84,981
Estimated Fair Value	84,981
Investments, Debt and Equity Securities [Abstract]
Face Value	121,140	$ 142,051
Amortized Cost Basis	106,121	121,650
Net Unrealized Gain (Loss)	2,756	483
Estimated Fair Value	108,877	122,133
Net Carrying Value	108,877	122,126
Municipal Bonds
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Face Value	21,140	21,185
Amortized Cost Basis	21,140	21,185
Net Unrealized Gain (Loss)	2,756	476
Estimated Fair Value	23,896	21,661
Net Carrying Value	23,896	21,661
Corporate Debt Securities
Held-to-Maturity Securities, Debt Maturities [Abstract]
Face Value	100,000	120,866
Amortized Cost Basis	84,981	100,465
Net Unrealized Gain	0	7
Estimated Fair Value	84,981	100,472
Net Carrying Value	$ 84,981	$ 100,465

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