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Investment Activity (Tenant Concentration) (Details) | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 30, 2022 USD ($) bedOrUnitInTheProperty | Mar. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) bedOrUnitInTheProperty | Jun. 30, 2022 USD ($) property | Dec. 31, 2023 USD ($) lease property unit boardMember masterLease facility state bedOrUnitInTheProperty shares | Dec. 31, 2022 USD ($) bedOrUnitInTheProperty | Dec. 31, 2021 USD ($) | Feb. 28, 2023 unit | Sep. 01, 2022 property | Apr. 01, 2022 property masterLease | Jun. 30, 2021 facility
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Nonportfolio assets, original cost |  |  |  |  | $ 2,600,000 |  |  |  |  |  |
Credit loss reserve |  |  | $ (15,338,000) |  | (15,476,000) | $ (15,338,000) |  |  |  |  |
Straight-line rent income, net of write-offs |  |  |  |  | $ 6,961,000 | (16,681,000) | $ 14,603,000 |  |  |  |
Lessor, operating lease, renewal term |  |  |  |  | 5 years |  |  |  |  |  |
Number of board of directors members also members of NHC board of directors | boardMember |  |  |  |  | 2 |  |  |  |  |  |
Lease incentive payments, net |  |  | 3,190,000 |  | $ 10,669,000 | 3,190,000 |  |  |  |  |
Rental income |  |  |  |  | $ 249,227,000 | 217,700,000 | 271,049,000 |  |  |  |
Bickford Senior Living Acquisition |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Properties | property |  |  |  |  | 2 |  |  |  |  |  |
Asset acquisition, rent deferral deduction |  | $ 2,500,000 | 3,000,000 |  |  |  |  |  |  |  |
Lease Extended Until 2028 |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Lease escalator minimum |  |  |  |  | 8.00% |  |  |  |  |  |
Senior Living Communities |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Straight-line rent income, net of write-offs |  |  |  |  | $ 1,200,000 | 400,000 | 2,500,000 |  |  |  |
Rental income |  |  |  |  | 51,274,000 | 51,183,000 | 50,726,000 |  |  |  |
NHC |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Straight-line rent income, net of write-offs |  |  |  |  | $ 1,200,000 | 500,000 | 0 |  |  |  |
Number of real estate properties sold | property |  |  |  |  |  |  |  |  | 7 |  |
Number of master leases | masterLease |  |  |  |  | 2 |  |  |  |  |  |
Lessor, operating lease, renewal term |  |  |  |  | 5 years |  |  |  |  |  |
Lessor equity shares owned, significant lessee (in shares) | shares |  |  |  |  | 1,630,642 |  |  |  |  |  |
Rental income |  |  |  |  | $ 37,335,000 | 36,893,000 | 37,735,000 |  |  |  |
NHC | NHC - 1991 Lease |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Percentage rent rate |  |  |  |  | 4.00% |  |  |  |  |  |
Bickford |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Properties | facility |  |  |  |  | 39 |  |  |  |  |  |
Straight-line rent income, net of write-offs |  |  |  |  |  | 18,200,000 | 1,700,000 |  |  |  |
Number of leases | lease |  |  |  |  | 4 |  |  |  |  |  |
Write off of financing receivable |  |  |  |  | $ 18,100,000 |  |  |  |  |  |
Proceeds from rent collection |  |  |  |  | 33,400,000 | 27,600,000 | 29,500,000 |  |  |  |
Rental income |  |  |  |  | 38,688,000 |  | 34,599,000 |  |  |  |
Asset acquisition, rent deferral deduction |  |  |  |  | 18,000,000 |  |  |  |  |  |
Amortization of rate deferral |  |  |  |  | 6,000,000 |  |  |  |  |  |
Bickford | Bickford |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of units in real estate property | 60 |  |  |  |  |  |  | 64 |  |  |
Payments for rent |  |  |  |  | 200,000 | 2,300,000 |  |  |  |  |
Asset acquisition, rent deferral deduction | $ 3,000,000 |  |  |  |  |  |  |  |  |  |
Bickford | Lease Extended Until 2028 |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Properties | property |  |  |  | 11 |  |  |  |  |  | 28 |
Number of master leases | masterLease |  |  |  |  |  |  |  |  |  | 3 |
Rental income |  |  |  |  | 28,300,000 |  |  |  |  |  |
Cash Basis Lessees |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Lease incentive payments, net |  |  | $ 7,100,000 |  | 7,100,000 | 7,100,000 |  |  |  |  |
Rental income |  |  |  |  | 48,300,000 | 21,400,000 | $ 68,800,000 |  |  |  |
Straight line rent adjustments |  |  |  |  | 26,000,000 |  |  |  |  |  |
Cash Basis Lessees | Bickford Senior Living Acquisition |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Asset acquisition, rent deferral deduction |  |  |  |  | $ 2,500,000 | $ 3,000,000 |  |  |  |  |
Holiday Acquisition Holdings |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Properties | facility |  |  |  |  |  |  |  |  |  |  | 17
NHC - 1991 Lease | Senior Living Communities |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Properties | property |  |  |  |  | 10 |  |  |  |  |  |
Number of units in real estate property | unit |  |  |  |  | 2,216 |  |  |  |  |  |
Revenue as % of Total, Exceeds 10% |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of states in which entity operates | bedOrUnitInTheProperty |  |  | 2 |  | 2 | 2 |  |  |  |  |
Geographic Concentration Risk | SOUTH CAROLINA | Investment Consideration Benchmark |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Percentage of continuing revenue |  |  |  |  | 12.10% | 12.10% |  |  |  |  |
Geographic Concentration Risk | TEXAS | Investment Consideration Benchmark |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Percentage of continuing revenue |  |  |  |  | 10.70% | 10.70% |  |  |  |  |
Independent Living Facilities |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of states in which entity operates | state |  |  |  |  | 8 |  |  |  |  |  |
Properties | property |  |  |  |  | 3 |  |  |  |  |  |
Independent Living Facilities | SHOP |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Real estate investment property, portfolio assets |  |  |  |  | $ 347,400,000 |  |  |  |  |  |
Properties | property |  |  |  |  | 15 |  |  |  |  | 15 |
Number of units in real estate property | unit |  |  |  |  | 1,733 |  |  |  |  |  |
Skilled Nursing Facilities |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Properties | facility |  |  |  |  | 32 |  |  |  |  |  |
Skilled Nursing Facilities | NHC | Subleased Facilities |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Properties | property |  |  |  |  | 4 |  |  |  |  |  |
Facilities Transitioned To Other Operators | Bickford |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Lessor, operating lease, contract term |  |  |  | 10 years |  |  |  |  |  |  |
Facilities Transitioned To Other Operators | Holiday Acquisition Holdings |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Properties | property |  |  |  | 1 |  |  |  |  |  | 1 |
Assisted Living Facilities | Bickford |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |
Straight line rent adjustments |  |  |  | $ 700,000 |  |  |  |  |  |  |

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- Definition This element represents the rental revenue rate earned during the period from lessee-operators based on revenues generated in their operations, generally in excess of a base amount. Generally stipulated in the lease agreement, it usually will provide for a fixed percentage of revenue to be paid as additional (or possibly only) rent due the lessor, and may be based on gross revenues, net revenues, or multiple variations thereof. + References No definition available. + Details
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- Definition Amount of lease income from operating, direct financing, and sales-type leases. Includes, but is not limited to, variable lease payments, interest income, profit (loss) recognized at commencement, and lease payments paid and payable to lessor. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479773/842-30-50-5 + Details
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