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Loans Receivable - 2020 Loans Receivable Transactions (Details) $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Nov. 30, 2021 USD ($) | Dec. 31, 2020 USD ($) property | Nov. 30, 2020 USD ($) property | Mar. 31, 2020 USD ($) | Dec. 31, 2021 USD ($) | Jun. 30, 2021 USD ($) property | Jan. 31, 2020 USD ($) property | Oct. 31, 2019 property
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Property count | property |  |  |  |  |  |  | 15 |
Loans receivable |  | $ 195,375 |  |  | $ 415,811 |  |  |
Loss on sale of direct financing lease |  |  |  | $ (42,000) |  |  |  |
Mezzanine |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Number of loan receivables | property |  |  | 1 |  |  |  |  |
Financing receivable, gross |  |  | $ 10,000 |  |  |  |  |
Proceeds from sale of receivables |  |  | 8,000 |  |  |  |  |
Loss on sale of direct financing lease |  |  | $ 2,000 |  |  |  |  |
Secured Mortgage Loans |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Loans receivable |  |  |  |  |  | $ 53,000 |  |
Number of loan receivables | property |  | 1 |  |  |  | 2 |  |
Financing receivable, gross |  | $ 115,000 |  |  |  | $ 64,000 |  |
Proceeds from sale of receivables | $ 51,000 | 109,000 |  |  |  |  |  |
Loss on sale of direct financing lease |  | 6,000 |  |  | 3,000 |  |  |
CCRC JV Investment | Other Non-Reporting Segment |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Property count | property |  |  |  |  |  |  |  | 15
Brookedale MTCA | Other Non-Reporting Segment |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Property count | property |  |  |  |  |  |  | 13 |
Brookedale MTCA | CCRC JV Investment |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Property count | property |  |  |  |  |  |  | 15 |
Brookedale MTCA | CCRC JV Investment | Other Non-Reporting Segment |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Property count | property |  |  |  |  |  |  | 13 |
Loans receivable |  | $ 23,000 |  |  | $ 24,000 |  | $ 30,000 |

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- Definition Amount excluding accrued interest, after allowance for credit loss, of financing receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 + Details
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- Definition Amount excluding accrued interest, before allowance for credit loss, of financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919230-210447 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 3B -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL120267963-210447 + Details
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