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Variable Interest Entities, Contingent Liability and Consolidated Joint Ventures - Ground Leases (Details) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2019 USD ($) | Sep. 30, 2018 USD ($) | Sep. 30, 2019 USD ($) item | Sep. 30, 2018 USD ($) | Dec. 31, 2018 USD ($)
Variable Interest Entities |  |  |  |  |
Total revenues | $ 20,414,000 | $ 19,570,000 | $ 62,288,000 | $ 58,856,000 |
VIE ground leases and aggregate carrying amount and maximum exposure to loss |  |  |  |  |
Restricted cash |  | 379,000 |  | 379,000 | $ 1,106,000
Rental income, net |  |  |  |  |
Variable Interest Entities |  |  |  |  |
Total revenues | 20,414,000 | 19,198,000 | 62,288,000 | 58,484,000 |
Variable Interest Entity, Not Primary Beneficiary |  |  |  |  |
VIE ground leases and aggregate carrying amount and maximum exposure to loss |  |  |  |  |
Restricted cash | 0 |  | 0 |  |
Variable Interest Entity, Not Primary Beneficiary | Ground lease rental income |  |  |  |  |
Variable Interest Entities |  |  |  |  |
Total revenues | 383,000 | 925,000 | 1,354,000 | 2,872,000 |
Variable Interest Entity, Not Primary Beneficiary | Properties Located in Lakemoor, Illinois and Wheaton, Illinois | Ground lease rental income |  |  |  |  |
Variable Interest Entities |  |  |  |  |
Total revenues | 203,000 | $ 512,000 | 814,000 | $ 1,659,000 |
Variable Interest Entity, Not Primary Beneficiary | The Briarbrook Village Apartments, Wheaton, Illinois | Restricted Cash |  |  |  |  |
VIE ground leases and aggregate carrying amount and maximum exposure to loss |  |  |  |  |
Cash reserve balance |  |  |  |  | 356,000
Variable Interest Entity, Not Primary Beneficiary | The Vue Apartments, Beachwood, Ohio |  |  |  |  |
VIE ground leases and aggregate carrying amount and maximum exposure to loss |  |  |  |  |
Land Contract Purchase Price |  |  | $ 13,896,000 |  |
Units in Apartment Complex | item |  |  | 348 |  |
Owner/ Operator Mortgage from Third Party |  |  | $ 67,444,000 |  |
Variable Interest Entity, Not Primary Beneficiary | The Vue Apartments, Beachwood, Ohio | Restricted Cash |  |  |  |  |
VIE ground leases and aggregate carrying amount and maximum exposure to loss |  |  |  |  |
Escrow deposit |  |  |  |  | $ 750,000
Variable Interest Entity, Not Primary Beneficiary | The Vue Apartments, Beachwood, Ohio | Land |  |  |  |  |
VIE ground leases and aggregate carrying amount and maximum exposure to loss |  |  |  |  |
Carrying Amount and Maximum Exposure to Loss | $ 13,901,000 |  | $ 13,901,000 |  |

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