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Real Estate Properties - Narrative (Details) $ in Thousands |  | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | ---
Aug. 03, 2020 USD ($) property | Aug. 06, 2020 USD ($) building | Jan. 31, 2020 USD ($) | Jun. 30, 2020 USD ($) state | Mar. 31, 2020 USD ($) building | Jun. 30, 2019 USD ($) | Jun. 30, 2020 USD ($) state building | Jun. 30, 2019 USD ($) | Jun. 30, 2020 building | Jun. 30, 2020 | Jun. 30, 2020 property
Real Estate Properties |  |  |  |  |  |  |  |  |  |  |
Number of real estate properties | property |  |  |  |  |  |  |  |  |  |  | 412
Number of states in which properties are located | state |  |  |  | 38 |  |  | 38 |  |  |  |
Impairment of assets | $ |  |  |  | $ 31,175 |  | $ 2,213 | $ 42,409 | $ 8,419 |  |  |
Held-for-sale |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties |  |  |  |  |  |  |  |  |  |  |
Number of real estate properties held for sale |  |  |  |  |  |  |  |  | 21 |  | 21
Impairment of assets | $ |  |  |  |  | $ 3,071 |  | 31,167 |  |  |  |
Held-for-sale | Medical Office Buildings |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties |  |  |  |  |  |  |  |  |  |  |
Number of real estate properties | building |  |  |  |  | 7 |  |  |  |  |  |
Number of real estate properties held for sale | building |  |  |  |  |  |  |  |  | 3 |  |
Impairment of assets | $ |  |  |  |  |  |  | 415 |  |  |  |
Held-for-sale | Senior Living Communities |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties |  |  |  |  |  |  |  |  |  |  |
Number of real estate properties | building |  |  |  |  | 2 |  |  |  |  |  |
Number of real estate properties held for sale | building |  |  |  |  |  |  |  |  | 15 |  |
Impairment of assets | $ |  |  |  |  |  |  | $ 30,752 |  |  |  |
Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties |  |  |  |  |  |  |  |  |  |  |
Number of real estate properties sold | building |  |  |  |  |  |  | 12 |  |  |  |
Aggregate sale price | $ |  |  |  |  |  |  | $ 68,154 |  |  |  |
Impairment of assets | $ |  |  |  |  |  |  | $ 8,171 |  |  |  |
Joint Venture |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties |  |  |  |  |  |  |  |  |  |  |
Ownership percentage |  |  |  |  |  |  |  |  |  | 55.00% |
Joint Venture | Life Science Building |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties |  |  |  |  |  |  |  |  |  |  |
Number of properties included in joint venture | property |  |  |  |  |  |  |  |  |  |  | 1
Tempe, AZ | Land Parcel |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties |  |  |  |  |  |  |  |  |  |  |
Aggregate purchase price | $ |  |  | $ 2,600 |  |  |  |  |  |  |  |
Subsequent Event |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties |  |  |  |  |  |  |  |  |  |  |
Aggregate sale price | $ | $ 231,725 |  |  |  |  |  |  |  |  |  |
Number of properties under agreement to sell | property | 24 |  |  |  |  |  |  |  |  |  |
Subsequent Event | Held-for-sale |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties |  |  |  |  |  |  |  |  |  |  |
Aggregate sale price | $ |  | $ 5,197 |  |  |  |  |  |  |  |  |
Subsequent Event | Held-for-sale | Medical Office Buildings |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties |  |  |  |  |  |  |  |  |  |  |
Number of real estate properties held for sale | building |  | 3 |  |  |  |  |  |  |  |  |
Number of real estate properties sold | building |  | 2 |  |  |  |  |  |  |  |  |
Subsequent Event | Held-for-sale | Senior Living Communities |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties |  |  |  |  |  |  |  |  |  |  |
Number of real estate properties held for sale | building |  | 15 |  |  |  |  |  |  |  |  |
Number of real estate properties sold | building |  | 2 |  |  |  |  |  |  |  |  |

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- Definition The number of real estate properties owned by the entity, which are classified as held for sale as of the balance sheet date. + References No definition available. + Details
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- Definition Number of Real Estate Properties Sold + References No definition available. + Details
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- Definition Represents the aggregate purchase price excluding acquisition costs of real estate properties acquired or agreed to be acquired by the entity. + References No definition available. + Details
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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
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- Definition The number of real estate properties owned as of the balance sheet date. + References No definition available. + Details
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