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Investments in and Advances to Unconsolidated Joint Ventures - Narrative (Details) $ in Thousands |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 30, 2015 USD ($) property | Dec. 31, 2016 USD ($) property | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
Schedule of Equity Method Investments |  |  |  |  |
Gain (loss) on sales of real estate, net |  |  | $ 356,641 | $ 164,698 | $ 6,377
HCP's share of earnings |  |  | $ 10,901 | $ 11,360 | $ 6,590
HCP Ventures III and IV, LLC | Hospital and medical office segments |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |
Total consideration for disposition of real estate | $ 634,000 |  |  |  |
Gain (loss) on sales of real estate, net | $ 59,000 |  |  |  |
HCP Ventures III and IV, LLC | Medical office |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |
Number of properties disposed | property | 61 |  |  |  |
HCP Ventures III and IV, LLC | Hospital |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |
Number of properties disposed | property | 3 |  |  |  |
HCP Ventures III, LLC | Hospital |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |
Number of properties disposed | property |  | 3 |  |  |
Total consideration for disposition of real estate |  | $ 31,000 |  |  |
Gain (loss) on sales of real estate, net |  | 5,000 |  |  |
HCP's share of earnings |  | 1,000 |  |  |
Distributions received by HCP |  | $ 8,000 |  |  |
HCP Ventures III and IV, LLC | Hospital and medical office segments |  |  |  |  |
Schedule of Equity Method Investments |  |  |  |  |
HCP's share of earnings | $ 15,000 |  |  |  |
Distributions received by HCP | $ 45,000 |  |  |  |

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