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v3.20.1

Investments in and Advances to Unconsolidated Joint Ventures (Details) $ in Thousands, £ in Millions |  | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jan. 31, 2020 USD ($) property | Jan. 31, 2020 USD ($) property | Dec. 31, 2019 GBP (£) | Dec. 31, 2019 USD ($) property joint_venture | Oct. 31, 2019 USD ($) property joint_venture | Mar. 31, 2020 USD ($) property joint_venture | Sep. 30, 2019 USD ($) | Mar. 31, 2019 USD ($) | Dec. 31, 2019 USD ($) property joint_venture
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Advances to unconsolidated joint ventures, net |  |  |  | $ 76 |  | $ 0 |  |  | $ 76
Investments in and advances to unconsolidated joint ventures |  |  |  | 825,515 |  | 479,900 |  |  | 825,515
Gain (loss) on sales of real estate |  |  |  |  |  | $ 164,869 |  | $ 8,044 |
SHOP JV |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Property count | property |  |  |  |  |  | 19 |  |  |
Investment ownership percentage |  |  |  |  |  | 54.00% |  |  |
Equity method investments |  |  |  | 428,258 |  | $ 411,057 |  |  | 428,258
MBK JV |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Property count | property |  |  |  |  |  | 5 |  |  |
Investment ownership percentage |  |  |  |  |  | 50.00% |  |  |
Equity method investments |  |  |  | 33,415 |  | $ 32,821 |  |  | 33,415
Other SHOP JVs |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Property count | property |  |  |  |  |  | 4 |  |  |
Equity method investments |  |  |  | 17,719 |  | $ 16,843 |  |  | 17,719
Other SHOP JVs | Minimum |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Investment ownership percentage |  |  |  |  |  | 50.00% |  |  |
Other SHOP JVs | Maximum |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Investment ownership percentage |  |  |  |  |  | 90.00% |  |  |
Waldwick |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Investment ownership percentage |  |  |  |  |  | 85.00% |  |  |
Otay Ranch |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Investment ownership percentage |  |  |  |  |  | 90.00% |  |  |
MBK Development JV |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Investment ownership percentage |  |  |  |  |  | 50.00% |  |  |
Medical Office JVs |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Property count | property |  |  |  |  |  | 3 |  |  |
Equity method investments |  |  |  | 9,845 |  | $ 9,809 |  |  | 9,845
Number of unconsolidated joint ventures (in joint ventures) | joint_venture |  |  |  |  |  | 3 |  |  |
Medical Office JVs | Minimum |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Investment ownership percentage |  |  |  |  |  | 20.00% |  |  |
Medical Office JVs | Maximum |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Investment ownership percentage |  |  |  |  |  | 67.00% |  |  |
HCP Ventures IV, LLC |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Investment ownership percentage |  |  |  |  |  | 20.00% |  |  |
HCP Ventures III, LLC |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Investment ownership percentage |  |  |  |  |  | 30.00% |  |  |
Suburban Properties, LLC |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Investment ownership percentage |  |  |  |  |  | 67.00% |  |  |
Other JVs |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Property count | property |  |  |  |  |  | 0 |  |  |
Equity method investments |  |  |  | $ 10,372 |  | $ 9,370 |  |  | $ 10,372
Other JVs | Minimum |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Investment ownership percentage |  |  |  |  |  | 41.00% |  |  |
Other JVs | Maximum |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Investment ownership percentage |  |  |  |  |  | 47.00% |  |  |
Discovery Naples JV |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Investment ownership percentage |  |  |  |  |  | 41.00% |  |  |
Investment return percentage |  |  |  |  |  | 10.00% |  |  |
Discovery Sarasota JV |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Investment ownership percentage |  |  |  |  |  | 47.00% |  |  |
K&Y JVs |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Investment ownership percentage |  |  |  | 80.00% |  |  |  |  | 80.00%
Number of unconsolidated joint ventures (in joint ventures) | joint_venture |  |  |  | 1 | 1 |  |  |  | 1
Proceeds from sale of equity method investments |  | $ 12,000 |  |  | $ 4,000 |  |  |  |
CCRC JV |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Property count | property |  |  |  |  |  | 2 |  |  |
Investment ownership percentage | 49.00% | 49.00% |  | 49.00% |  | 49.00% |  |  | 49.00%
Equity method investments |  |  |  | $ 325,830 |  | $ 0 |  |  | $ 325,830
Number of properties classified as held for sale | property |  |  |  | 1 |  |  |  |  | 1
Impairment charge |  |  |  |  |  |  | $ 6,000 |  | $ 12,000
UK JV |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Investment ownership percentage |  |  |  | 49.00% |  |  |  |  | 49.00%
Proceeds from sale of equity method investments |  |  | £ 70 | $ 91,000 |  |  |  |  |
Loss on sale |  |  |  | 7,000 |  |  |  |  |
Gain (loss) on sales of real estate |  |  |  | $ 1,000 |  |  |  |  |
Brookedale MTCA |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Gain (loss) on sales of real estate | $ 164,000 |  |  |  |  |  |  |  |
Brookedale MTCA | CCRC JV |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Interest acquired | 51.00% |  |  |  |  |  |  |  |
CCRC JV | Brookedale MTCA |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Property count | property | 15 | 15 |  |  |  |  |  |  |
Equity method investments | $ 323,000 | $ 323,000 |  |  |  |  |  |  |
CCRC JV | Assets Leased to Others | Other non-reportable segments |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Property count | property | 15 | 15 |  |  | 15 |  |  |  |
CCRC JV | Assets Leased to Others | Other non-reportable segments | Brookedale MTCA |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Property count | property | 13 | 13 |  |  |  |  |  |  |
Interest acquired |  | 51.00% |  |  |  |  |  |  |

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