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v3.20.2

Summary of Significant Accounting Policies - Narrative (Details) $ in Thousands | 12 Months Ended |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2019 USD ($) facility | Dec. 31, 2018 USD ($) | Sep. 30, 2020 USD ($) property | Jun. 30, 2020 USD ($) | Jan. 31, 2020 facility | Jan. 31, 2020 property | Jan. 01, 2020 USD ($) | Oct. 31, 2019 property | Sep. 30, 2019 USD ($) | Jun. 30, 2019 USD ($) | Jan. 01, 2019 USD ($)
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Accounting Standards Update [Extensible List] | us-gaap:AccountingStandardsUpdate201613Member |  | us-gaap:AccountingStandardsUpdate201602Member |  |  |  |  |  |  |  |  |  |
Cumulative effect adjustment | $ 6,667,474 |  | $ 6,512,591 |  | $ 7,406,308 | $ 7,668,721 |  |  |  |  | $ 6,523,359 | $ 6,619,272 |
Present value of lease liabilities | 156,611 |  |  |  | 175,002 |  |  |  |  |  |  |  |
Right-of-use asset | 172,486 |  |  |  | 190,875 |  |  |  |  |  |  |  |
Unamortized lease intangibles | (331,693) |  |  |  | $ (501,583) |  |  |  |  |  |  |  |
Accounting Standards Update 2016-02 |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Present value of lease liabilities |  |  |  |  |  |  |  |  |  |  |  |  | $ 153,000
Right-of-use asset |  |  |  |  |  |  |  |  |  |  |  |  | 166,000
Accrued straight-line rent liability |  |  |  |  |  |  |  |  |  |  |  |  | 20,000
Unamortized lease intangibles |  |  |  |  |  |  |  |  |  |  |  |  | 33,000
Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative effect adjustment | $ (1,524) | [1] | $ 590 | [2] |  |  |  |  | $ 2,000 |  |  |  | $ 1,000
CCRC JV | Brookedale MTCA |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Property count | property |  |  |  |  |  |  |  | 15 |  |  |  |  |
Other Non-reportable Segments | Assets Leased to Others | CCRC JV |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Property count |  |  |  |  |  |  | 15 | 15 |  | 15 |  |  |
Other Non-reportable Segments | Assets Leased to Others | CCRC JV | Brookedale MTCA |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Property count |  |  |  |  | 13 |  | 13 | 13 |  |  |  |  |
SHOP |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of deconsolidating assets | 19 |  |  |  | 19 |  |  |  |  |  |  |  |
[1] | On January 1, 2020, the Company adopted a series of Accounting Standards Updates (“ASUs”) related to accounting for credit losses and recognized the cumulative-effect of adoption to beginning retained earnings. Refer to Note 2 for a detailed impact of adoption.
[2] | On January 1, 2019, the Company adopted a series of ASUs related to accounting for leases and recognized the cumulative-effect of adoption to beginning retained earnings. Refer to Note 2 for a detailed impact of adoption.

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