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Real Estate (Schedule of Real Estate Assets) (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | May 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Real Estate Properties [Line Items] |  |  |
Real estate, net | $ 1,527,219 |  | $ 1,771,019
Real estate available and held for sale | 8,650 |  | 22,551
Total real estate | 1,535,869 |  | 1,793,570
Net investment in leases | 418,915 | $ 424,100 | 0
Real estate assets derecognized at inception of sales-type lease |  | $ 193,400 |
Net Lease |  |  |
Real Estate Properties [Line Items] |  |  |
Land, at cost | 199,710 |  | 336,740
Buildings and improvements, at cost | 1,347,321 |  | 1,487,270
Less: accumulated depreciation | (219,949) |  | (287,516)
Real estate, net | 1,327,082 |  | 1,536,494
Real estate available and held for sale | 0 |  | 1,055
Total real estate | 1,327,082 |  | 1,537,549
Operating Properties |  |  |
Real Estate Properties [Line Items] |  |  |
Land, at cost | 106,187 |  | 133,599
Buildings and improvements, at cost | 107,861 |  | 118,724
Less: accumulated depreciation | (13,911) |  | (17,798)
Real estate, net | 200,137 |  | 234,525
Real estate available and held for sale | 8,650 |  | 21,496
Total real estate | 208,787 |  | 256,021
Real Estate Properties |  |  |
Real Estate Properties [Line Items] |  |  |
Land, at cost | 305,897 |  | 470,339
Buildings and improvements, at cost | 1,455,182 |  | 1,605,994
Less: accumulated depreciation | (233,860) |  | (305,314)
Real estate, net | 1,527,219 |  | 1,771,019
Real estate available and held for sale | 8,650 |  | 22,551
Total real estate | 1,535,869 |  | 1,793,570
Residential Operating Properties |  |  |
Real Estate Properties [Line Items] |  |  |
Real estate available and held for sale | $ 8,600 |  | $ 20,600

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