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Real Estate Properties - Schedule of Real Estate Properties (Details) $ in Thousands | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
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 ($) ft² building | Jun. 30, 2020 USD ($) building | Mar. 31, 2020 USD ($) | Jun. 30, 2019 USD ($) | Jun. 30, 2020 USD ($) building | Jun. 30, 2019 USD ($) | Jun. 30, 2020 USD ($) | Jun. 30, 2020 property
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Impairment of Assets |  |  |  |  |  | $ 31,175 |  | $ 2,213 | $ 42,409 | $ 8,419 |  |
Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of real estate properties sold | building |  |  |  |  |  |  |  |  | 12 |  |  |
Sales Price |  |  |  |  |  |  |  |  | $ 68,154 |  |  |
Gain (loss) on Sale |  |  |  |  |  |  |  |  | 2,614 |  |  |
Impairment of Assets |  |  |  |  |  |  |  |  | 8,171 |  |  |
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 |  |  |  |  |  |  |  |  |
Square Feet | ft² |  |  | 70,229 |  |  |  |  |  |  |  |  |
Sales Price |  |  | $ 8,779 |  |  |  |  |  |  |  |  |
Gain (loss) on Sale |  |  | 2,863 |  |  |  |  |  |  |  |  |
Impairment of Assets |  |  | $ 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 | 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 |  |  |  |  |  |  |  |  |  |
Held-for-sale |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Impairment of Assets |  |  |  |  |  |  | $ 3,071 |  | $ 31,167 |  |  |
Number of real estate properties held for sale | 21 |  |  |  |  | 21 |  |  | 21 |  |  | 21
Undepreciated Carrying Value |  |  |  |  |  |  |  |  |  |  | $ 112,631 |
Held-for-sale | Medical Office Buildings |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Impairment of Assets |  |  |  |  |  |  |  |  | $ 415 |  |  |
Number of real estate properties held for sale | building | 3 |  |  |  |  | 3 |  |  | 3 |  |  |
Undepreciated Carrying Value |  |  |  |  |  |  |  |  |  |  | 11,832 |
Held-for-sale | Senior Living Communities |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Impairment of Assets |  |  |  |  |  |  |  |  | $ 30,752 |  |  |
Number of real estate properties held for sale | building | 15 |  |  |  |  | 15 |  |  | 15 |  |  |
Undepreciated Carrying Value |  |  |  |  |  |  |  |  |  |  | 52,563 |
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 |  |  |  |  | 3 |  |  | 3 |  |  |
Undepreciated Carrying Value |  |  |  |  |  |  |  |  |  |  | $ 48,236 |

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