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Master Transactions and Cooperation Agreement with Brookdale (Details) $ in Thousands |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 31, 2020 USD ($) property lease | Jan. 31, 2020 | Mar. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Nov. 30, 2017 USD ($) property facility | Jun. 30, 2020 USD ($) property | Mar. 31, 2020 USD ($) property | Jun. 30, 2019 USD ($) property | Jun. 30, 2020 USD ($) property | Jun. 30, 2019 USD ($) property | Dec. 31, 2020 USD ($) property | Dec. 31, 2019 USD ($) property | Dec. 31, 2018 property | Jan. 31, 2020 property | Jan. 31, 2020 facility | Jan. 31, 2020 USD ($) | Oct. 31, 2019 property | Jan. 01, 2018 USD ($) property
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital investment |  |  |  |  |  | $ 3,000 |  |  | $ 3,000 |  |  |  |  |  |  |  |  |
Loss (gain) upon change of control, net |  |  |  |  |  |  |  |  | 169,962 | $ 11,501 |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  | 6,756,432 |  |  | 6,756,432 |  |  |  |  |  |  |  |  |
Gain (loss) on sales of real estate, net |  |  |  |  |  | $ 82,863 |  | $ 11,448 | $ 247,732 | $ 19,492 |  |  |  |  |  |  |  |
Payment to acquired noncontrolling interest |  |  | $ 63,000 | $ 32,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
RIDEA Facilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage (as a percent) |  |  |  |  | 90.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Leased to Others |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of assets transitioned | property |  |  |  |  |  |  |  |  |  |  |  |  | 37 |  |  |  |  |
Assets Leased to Others | RIDEA Facilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property count | facility |  |  |  |  | 58 |  |  |  |  |  |  |  |  |  |  |  |  |
Other non-reportable segments | Assets Leased to Others | CCRC JV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property count |  |  |  |  |  |  |  |  |  |  |  |  |  | 15 | 15 |  | 15 |
Senior housing triple-net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of assets to be sold | property |  |  |  |  |  |  | 18 |  |  | 2 |  |  |  |  |  |  |  |
Senior housing triple-net | Assets Leased to Others |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property count | property |  |  |  |  | 78 |  |  |  |  |  |  |  |  |  |  |  | 43 |
Disposition of properties, available for sale | property |  |  |  |  | 32 |  |  |  |  |  |  |  |  |  |  |  |  |
Reduction in rent |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 5,000
Number of properties with rent concessions | property |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3
Total consideration for disposition of real estate |  |  |  |  | $ 35,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of assets transitioned | property |  |  |  |  |  |  |  |  |  |  |  |  | 17 |  |  |  |  |
Senior housing triple-net | Assets Leased to Others | Brookedale MTCA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of properties disposed | property |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |
SHOP |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of assets to be sold | property |  |  |  |  |  | 2 | 7 | 1 |  | 10 |  |  |  |  |  |  |  |
SHOP | Assets Leased to Others |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of assets transitioned | property |  |  |  |  |  |  |  |  |  |  |  |  | 20 |  |  |  |  |
SHOP | Assets Leased to Others | RIDEA Facilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property count | property |  |  |  |  | 36 |  |  |  |  |  |  |  |  |  |  |  |  |
Total consideration for disposition of real estate |  |  |  |  | $ 240,000 |  |  |  |  |  |  |  |  |  |  |  |  |
SHOP | Assets Leased to Others | Brookedale MTCA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of assets to be sold | property |  |  |  |  | 4 |  |  |  |  |  |  |  |  |  |  |  |  |
CCRC JV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of interest acquired |  |  |  |  | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |
CCRC JV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property count | property |  |  |  |  |  | 2 |  |  | 2 |  |  |  |  |  |  |  |  |
Investment ownership percentage | 49.00% | 49.00% |  |  |  | 49.00% |  |  | 49.00% |  |  | 49.00% |  |  |  |  |  |
Equity method investments |  |  |  |  |  | $ 179 |  |  | $ 179 |  |  | $ 325,830 |  |  |  |  |  |
Brookedale MTCA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of properties disposed | property | 18 |  |  |  |  |  | 18 |  |  |  |  | 18 |  |  |  |  |  |
Cash proceeds | $ 385,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on sales of real estate, net | $ 164,000 |  |  |  |  |  | $ 165,000 |  |  |  |  |  |  |  |  |  |  |
Brookedale MTCA | 2019 Amended Master Lease |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual rent escalator | 2.40% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Brookedale MTCA | CCRC JV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property count | property |  |  |  |  |  |  |  |  |  |  |  |  |  | 15 |  |  |  |
Number of properties acquired | property | 13 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity method investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 323,000 |  |
Real estate and intangible assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,800,000 |  |
Refundable entrance fee liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 308,000 |  |
Non-refundable entrance fee liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 436,000 |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 215,000 |  |
Working capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 48,000 |  |
Cash paid | $ 396,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Brookedale MTCA | Assets Leased to Others | 2019 Amended Master Lease |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of properties to be restructured | property |  |  |  |  |  |  |  |  |  |  |  |  |  | 24 |  |  |  |
Number of leases to be terminated | lease | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percent of sales proceeds | 6.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of properties to be reallocated | property |  |  |  |  |  |  |  |  |  |  |  |  |  | 14 |  |  |  |
Future rent |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20,000 |  |
Capital investment term | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Brookedale MTCA | Other non-reportable segments | Assets Leased to Others | CCRC JV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property count |  |  |  |  |  |  |  |  |  |  |  |  |  | 13 | 13 |  |  |
Interest acquired |  | 51.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Brookedale MTCA | CCRC JV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest acquired | 51.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase cost |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,060,000 |  |
Management termination fee | $ 100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other Income (Expense) | Brookedale MTCA | CCRC JV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss (gain) upon change of control, net | $ 170,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement Input, Discount Rate | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement input | 0.10 | 0.10 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement Input, Discount Rate | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement input | 0.12 | 0.12 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement Input, Annual Rent Escalators | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement input | 0.02 | 0.02 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement Input, Annual Rent Escalators | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement input | 0.03 | 0.03 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement Input, Cap Rate | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement input | 0.07 | 0.07 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement Input, Cap Rate | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement input | 0.09 | 0.09 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event | Brookedale MTCA | Assets Leased to Others | 2019 Amended Master Lease |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of leases to be terminated | property |  |  |  |  |  |  |  |  |  |  | 1 |  |  |  |  |  |  |
Capital investment |  |  |  |  |  |  |  |  |  |  | $ 35,000 |  |  |  |  |  |  |
Annual percent increase |  |  |  |  |  |  |  |  |  |  | 7.00% |  |  |  |  |  |  |
Subsequent Event | Brookedale MTCA | CCRC JV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of assets to be sold | property |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |

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