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Investment in Unconsolidated Ventures (Details) $ in Thousands | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Jan. 31, 2017 USD ($) | Mar. 31, 2016 Community | Jun. 30, 2015 USD ($) Community | Dec. 31, 2016 USD ($) Community | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) Community | Aug. 31, 2014
Schedule of Investment in Unconsolidated Joint Ventures [Line Items] |  |  |  |  |  |  |
Percentage ownership in unconsolidated joint ventures | 10.00% |  |  |  |  |  |
Equity Method Investment, Summarized Financial Information, Current Assets |  |  |  | $ 128,000 | $ 143,000 |  |
Equity Method Investment, Summarized Financial Information, Noncurrent Assets |  |  |  | 3,932,000 | 4,168,000 |  |
Equity Method Investment, Summarized Financial Information, Current Liabilities |  |  |  | 1,153,000 | 583,000 |  |
Equity Method Investment, Summarized Financial Information, Noncurrent Liabilities |  |  |  | 2,215,000 | 2,294,000 |  |
Equity Method Investment, Summarized Financial Information, Revenue |  |  |  | 1,133,000 | 964,000 | $ 439,000 |
Equity Method Investment, Summarized Financial Information, Cost of Sales |  |  |  | (779,000) | (679,000) | (293,000) |
Equity Method Investment, Summarized Financial Information, Net Income (Loss) |  |  |  | (4,000) | (18,000) | (10,000) |
Distributions from unconsolidated ventures from cumulative share of net earnings |  |  |  | 23,544 | 7,825 | $ 1,840 |
Equity Method Investment, Other than Temporary Impairment |  |  |  | $ 36,800 |  |  |
Number of communities purchased or sold | Community |  | 7 |  | 51 |  | 4 |
Partners Joint Venture Ownership Percentage (in hundredths) |  |  |  |  |  |  | 49.00%
Investment in unconsolidated ventures |  |  |  | $ (13,377) | $ (69,297) | $ (26,499) |
Equity Method Liability |  |  |  | 60,200 |  |  |
CCRC Venture opco [Member] |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |
Maximum Exposure to Loss |  |  |  | 50,100 |  |  |
Carrying Amount |  |  |  | 50,100 |  |  |
RIDEA Ventures [Member] |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |
Maximum Exposure to Loss |  |  |  | 92,100 |  |  |
Carrying Amount |  |  |  | $ 92,100 |  |  |
CCRC Ventures, LLC [Member] |  |  |  |  |  |  |
Schedule of Investment in Unconsolidated Joint Ventures [Line Items] |  |  |  |  |  |  |
Percentage ownership in unconsolidated joint ventures |  |  |  | 51.00% |  |  |
Distributions from unconsolidated ventures from cumulative share of net earnings |  |  |  | $ 221,600 |  |  |
Proceeds from debt financing |  |  |  | $ 434,500 |  |  |
BKD-HCN Venture, LLC [Member] |  |  |  |  |  |  |
Schedule of Investment in Unconsolidated Joint Ventures [Line Items] |  |  |  |  |  |  |
Percentage ownership in unconsolidated joint ventures |  |  |  | 20.00% |  |  |
S-H Forty-Nine Ventures, LLC [Member] |  |  |  |  |  |  |
Schedule of Investment in Unconsolidated Joint Ventures [Line Items] |  |  |  |  |  |  |
Percentage ownership in unconsolidated joint ventures |  |  |  | 20.00% |  |  |
S-H Twenty-One Ventures, LLC [Member] |  |  |  |  |  |  |
Schedule of Investment in Unconsolidated Joint Ventures [Line Items] |  |  |  |  |  |  |
Percentage ownership in unconsolidated joint ventures |  |  |  | 10.00% |  |  |
S-H Thirty-Five Venture, LLC [Member] |  |  |  |  |  |  |
Schedule of Investment in Unconsolidated Joint Ventures [Line Items] |  |  |  |  |  |  |
Percentage ownership in unconsolidated joint ventures |  |  |  | 10.00% |  |  |
Acquisition of Venture Interest [Member] |  |  |  |  |  |  |
Schedule of Investment in Unconsolidated Joint Ventures [Line Items] |  |  |  |  |  |  |
Number of communities purchased or sold | Community |  |  | 35 |  |  |  |
Aggregate purchase price |  |  | $ 847,000 |  |  |  |
Partners Joint Venture Ownership Percentage (in hundredths) |  |  | 10.00% |  |  |  |
Investment in unconsolidated ventures |  |  | $ 30,300 |  |  |  |
Sale of 10% ownership interest in the HCP 49 Venture [Member] |  |  |  |  |  |  |
Schedule of Investment in Unconsolidated Joint Ventures [Line Items] |  |  |  |  |  |  |
Percentage ownership in unconsolidated joint ventures | 10.00% |  |  |  |  |  |
Proceeds from Sale of Equity Method Investments | $ 26,800 |  |  |  |  |  |

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