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Real Estate Properties - Schedule of Real Estate Properties (Details) $ in Thousands | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2020 USD ($) building living_unit | Aug. 31, 2020 USD ($) building living_unit | Jul. 31, 2020 USD ($) ft² building | Jun. 30, 2020 USD ($) ft² building | Apr. 30, 2020 USD ($) living_unit building | Mar. 31, 2020 USD ($) ft² building | Feb. 29, 2020 USD ($) ft² building | Jan. 31, 2020 USD ($) ft² building | Sep. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) | Sep. 30, 2019 USD ($) | Sep. 30, 2020 USD ($) building | Sep. 30, 2019 USD ($) | Sep. 30, 2020 property | Sep. 30, 2020 building
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of Assets |  |  |  |  |  |  |  |  | $ 64,202 |  | $ 33,099 | $ 106,611 | $ 41,518 |  |
Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of real estate properties sold | building |  |  |  |  |  |  |  |  |  |  |  | 17 |  |  |
Gain (loss) on Sale |  |  |  |  |  |  |  |  |  |  |  | $ 2,403 |  |  |
Impairment of Assets |  |  |  |  |  |  |  |  |  |  |  | 8,813 |  |  |
Disposed of by Sale, Not Discontinued Operations | Medical Office Buildings | Louisiana |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of real estate properties sold | building |  |  |  |  |  |  |  | 6 |  |  |  |  |  |  |
Square Feet | ft² |  |  |  |  |  |  |  | 40,575 |  |  |  |  |  |  |
Sales Price |  |  |  |  |  |  |  | $ 5,925 |  |  |  |  |  |  |
Gain (loss) on Sale |  |  |  |  |  |  |  | (81) |  |  |  |  |  |  |
Impairment of Assets |  |  |  |  |  |  |  | $ 0 |  |  |  |  |  |  |
Disposed of by Sale, Not Discontinued Operations | Medical Office Buildings | Pennsylvania |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of real estate properties sold | building |  |  |  |  |  |  | 1 |  |  |  |  |  |  |  |
Square Feet | ft² |  |  |  |  |  |  | 50,000 |  |  |  |  |  |  |  |
Sales Price |  |  |  |  |  |  | $ 2,900 |  |  |  |  |  |  |  |
Gain (loss) on Sale |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |
Impairment of Assets |  |  |  |  |  |  | $ (47) |  |  |  |  |  |  |  |
Disposed of by Sale, Not Discontinued Operations | Medical Office Buildings | Texas |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of real estate properties sold | building |  |  | 1 |  |  | 1 |  |  |  |  |  |  |  |  |
Square Feet | ft² |  |  | 6,849 |  |  | 70,229 |  |  |  |  |  |  |  |  |
Sales Price |  |  | $ 2,072 |  |  | $ 8,779 |  |  |  |  |  |  |  |  |
Gain (loss) on Sale |  |  | (30) |  |  | 2,863 |  |  |  |  |  |  |  |  |
Impairment of Assets |  |  | $ 0 |  |  | $ 0 |  |  |  |  |  |  |  |  |
Disposed of by Sale, Not Discontinued Operations | Medical Office Buildings | South Carolina |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of real estate properties sold | building |  |  |  | 1 |  |  |  |  |  |  |  |  |  |  |
Square Feet | ft² |  |  |  | 49,242 |  |  |  |  |  |  |  |  |  |  |
Sales Price |  |  |  | $ 3,550 |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on Sale |  |  |  | 0 |  |  |  |  |  |  |  |  |  |  |
Impairment of Assets |  |  |  | $ 2,753 |  |  |  |  |  |  |  |  |  |  |
Disposed of by Sale, Not Discontinued Operations | Medical Office Buildings | Connecticut |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of real estate properties sold | building |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |
Square Feet | ft² |  |  | 32,162 |  |  |  |  |  |  |  |  |  |  |  |
Sales Price |  |  | $ 625 |  |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on Sale |  |  | (25) |  |  |  |  |  |  |  |  |  |  |  |
Impairment of Assets |  |  | $ 267 |  |  |  |  |  |  |  |  |  |  |  |
Disposed of by Sale, Not Discontinued Operations | Senior Living Communities | California |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of real estate properties sold | building |  |  |  |  | 3 |  |  |  |  |  |  |  |  |  |
Number of Units | living_unit |  |  |  |  | 599 |  |  |  |  |  |  |  |  |  |
Sales Price |  |  |  |  | $ 47,000 |  |  |  |  |  |  |  |  |  |
Gain (loss) on Sale |  |  |  |  | (168) |  |  |  |  |  |  |  |  |  |
Impairment of Assets |  |  |  |  | $ 5,465 |  |  |  |  |  |  |  |  |  |
Disposed of by Sale, Not Discontinued Operations | Senior Living Communities | Mississippi |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of real estate properties sold | building | 1 | 2 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Units | living_unit | 78,747 | 116 |  |  |  |  |  |  |  |  |  |  |  |  |
Sales Price | $ 7,250 | $ 2,500 |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on Sale | (114) | (42) |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of Assets | 148 | $ 227 |  |  |  |  |  |  |  |  |  |  |  |  |
Held-for-sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales Price |  |  |  |  |  |  |  |  |  |  |  | 80,601 |  |  |
Impairment of Assets |  |  |  |  |  |  |  |  |  |  |  | 34,880 |  |  |
Number of real estate properties held for sale |  |  |  |  |  |  |  |  |  |  |  |  |  | 22 | 22
Gross Book Value | 165,791 |  |  |  |  |  |  |  | 165,791 |  |  | 165,791 |  |  |
Held-for-sale | Medical Office Buildings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of Assets |  |  |  |  |  |  |  |  |  | $ 3,071 |  | 1,524 |  |  |
Number of real estate properties held for sale | building |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5
Gross Book Value | 69,230 |  |  |  |  |  |  |  | 69,230 |  |  | 69,230 |  |  |
Held-for-sale | Senior Living Communities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of Assets |  |  |  |  |  |  |  |  |  |  |  | 33,356 |  |  |
Number of real estate properties held for sale | building |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 14
Gross Book Value | 52,958 |  |  |  |  |  |  |  | 52,958 |  |  | 52,958 |  |  |
Held-for-sale | Triple Net Leased Senior Living Communities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of Assets |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  |
Number of real estate properties held for sale | building |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3
Gross Book Value | $ 43,603 |  |  |  |  |  |  |  | $ 43,603 |  |  | $ 43,603 |  |  |

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