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Real Estate Properties - Schedule of Real Estate Properties (Details) $ in Thousands |  | 1 Months Ended | 9 Months Ended
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Nov. 06, 2019 USD ($) | Nov. 06, 2019 USD ($) property | Oct. 31, 2019 USD ($) ft² living_unit property | Sep. 30, 2019 USD ($) ft² living_unit building property | Aug. 31, 2019 USD ($) ft² building | Jul. 31, 2019 USD ($) ft² building | Jun. 30, 2019 USD ($) ft² building property | May 31, 2019 USD ($) ft² living_unit building | Mar. 31, 2019 USD ($) ft² building | Feb. 28, 2019 USD ($) ft² building | Sep. 30, 2019 USD ($) building property
SNF |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of real estate properties sold | property |  |  |  | 15 |  |  |  |  |  |  |
MOBs |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of real estate properties sold | property |  |  |  |  |  |  | 4 |  |  |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross Sales Price |  |  |  |  |  |  |  |  |  |  | $ 53,033
Number of real estate properties sold | building |  |  |  |  |  |  |  |  |  |  | 33
Gain (loss) on Sale |  |  |  |  |  |  |  |  |  |  | $ 21,893
Disposal Group, Disposed of by Sale, Not Discontinued Operations | SNF |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross Sales Price |  |  |  |  |  |  |  |  |  |  | $ 29,500
Number of real estate properties sold | property |  |  |  |  |  |  |  |  |  |  | 18
Disposal Group, Disposed of by Sale, Not Discontinued Operations | SNF | California |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of units | living_unit |  |  |  |  |  |  |  | 278 |  |  |
Gross Sales Price |  |  |  |  |  |  |  | $ 21,500 |  |  |
Number of real estate properties sold | building |  |  |  |  |  |  |  | 3 |  |  |
Gain (loss) on Sale |  |  |  |  |  |  |  | $ 15,207 |  |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations | SNF | Various |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of units | living_unit |  |  |  | 964 |  |  |  |  |  |  |
Gross Sales Price |  |  |  | $ 8,000 |  |  |  |  |  |  |
Number of real estate properties sold | building |  |  |  | 15 |  |  |  |  |  |  |
Gain (loss) on Sale |  |  |  | $ 0 |  |  |  |  |  |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations | MOBs | Florida |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Square footage of properties sold | ft² |  |  |  |  |  |  |  |  |  | 60,396 |
Gross Sales Price |  |  |  |  |  |  |  |  |  | $ 2,900 |
Number of real estate properties sold | building |  |  |  |  |  |  |  |  |  | 1 |
Gain (loss) on Sale |  |  |  |  |  |  |  |  |  | $ (69) |
Disposal Group, Disposed of by Sale, Not Discontinued Operations | MOBs | Massachusetts |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Square footage of properties sold | ft² |  |  |  | 41,065 | 49,357 | 103,484 | 164,121 |  | 4,400 |  |
Gross Sales Price |  |  |  | $ 2,750 | $ 2,221 | $ 4,955 | $ 8,042 |  | $ 75 |  |
Number of real estate properties sold | building |  |  |  | 1 | 1 | 3 | 7 |  | 1 |  |
Gain (loss) on Sale |  |  |  | $ 1,044 | $ 812 | $ 2,332 | $ 1,590 |  | $ (58) |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations | MOBs | Colorado |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Square footage of properties sold | ft² |  |  |  |  |  |  |  | 15,647 |  |  |
Gross Sales Price |  |  |  |  |  |  |  | $ 2,590 |  |  |
Number of real estate properties sold | building |  |  |  |  |  |  |  | 1 |  |  |
Gain (loss) on Sale |  |  |  |  |  |  |  | $ 1,035 |  |  |
Subsequent Event |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross Sales Price | $ 452,804 |  |  |  |  |  |  |  |  |  |
Subsequent Event | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross Sales Price |  | $ 58,000 |  |  |  |  |  |  |  |  |
Number of real estate properties sold | property |  | 4 |  |  |  |  |  |  |  |  |
Subsequent Event | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Independent Living/SNF | South Dakota |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of units | living_unit |  |  | 245 |  |  |  |  |  |  |  |
Gross Sales Price |  |  | $ 10,500 |  |  |  |  |  |  |  |
Number of real estate properties sold | property |  |  | 3 |  |  |  |  |  |  |  |
Subsequent Event | Disposal Group, Disposed of by Sale, Not Discontinued Operations | MOBs | New Jersey |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Square footage of properties sold | ft² |  |  | 205,439 |  |  |  |  |  |  |  |
Gross Sales Price |  |  | $ 47,500 |  |  |  |  |  |  |  |
Number of real estate properties sold | property |  |  | 1 |  |  |  |  |  |  |  |

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