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Real Estate - Schedule of Acquisitions and Conversions (Parenthetical) (Details) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2019 USD ($) property | Dec. 31, 2018 USD ($)
Business Acquisition [Line Items] |  |
Aggregate purchase price | $ 260,344 | $ 186,463
Soho Acquisitions | New York, NY |  |
Business Acquisition [Line Items] |  |
Number of real estate properties held by Acquiree | property | 7 |
Aggregate purchase price | $ 122,000 |

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