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Note 8 - Long-term Leases (Details Textual) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 USD ($) | Sep. 30, 2023 USD ($) | Sep. 30, 2024 USD ($) | Sep. 30, 2023 USD ($)
Lessee, Operating Lease, Liability, to be Paid, Year One | $ 35,858,000 |  | $ 35,858,000 |
Lessee, Operating Lease, Liability, to be Paid, Year Two | 35,183,000 |  | 35,183,000 |
Lessee, Operating Lease, Liability, to be Paid, Year Three | 10,471,000 |  | 10,471,000 |
Operating Lease, Expense | $ 10,886,000 | $ 10,094,000 | $ 31,804,000 | $ 30,087,000
Two Leases with NHI [Member] |  |  |  |
Number of Skilled Nursing Centers Leased from NHI | 28 |  | 28 |
Number of Assisted Living Centers Leased from NHI | 5 |  | 5 |
Number of Independent Living Centers Leased from NHI | 3 |  | 3 |
Lease One With NHI [Member] |  |  |  |
Number of Skilled Nursing Facilities Subleased | 4 |  | 4 |
NHI Lease Agreement [Member] |  |  |  |
Lessee, Operating Lease, Liability, to be Paid, Year One | $ 32,625,000 |  | $ 32,625,000 |
Lessee, Operating Lease, Liability, to be Paid, Year Two | 32,225,000 |  | 32,225,000 |
Lessee, Operating Lease, Liability, to be Paid, Year Three | 31,975,000 |  | 31,975,000 |
Both NHI Lease Agreements [Member] |  |  |  |
Operating Lease, Expense | $ 10,085,000 | $ 9,300,000 | $ 29,371,000 | $ 27,719,000

X
- Definition Number of Assisted Living Centers under lease agreements with NHI + References No definition available. + Details
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Namespace Prefix: | nhc_
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Balance Type: | na
Period Type: | instant

X
- Definition Number of Independent Living Centers under lease agreements with NHI + References No definition available. + Details
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Namespace Prefix: | nhc_
Data Type: | xbrli:integerItemType
Balance Type: | na
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X
- Definition Number of Skilled Nursing Centers under lease agreements with NHI + References No definition available. + Details
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Namespace Prefix: | nhc_
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X
- Definition Represents the number of skilled nursing facilities that the company subleases. + References No definition available. + Details
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Namespace Prefix: | nhc_
Data Type: | xbrli:integerItemType
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X
- Definition Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-6 + Details
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X
- Definition Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-6 + Details
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X
- Definition Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-6 + Details
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X
- Definition Amount of operating lease expense. Excludes sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 4 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479041/842-20-45-4 + Details
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- Details
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- Details
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- Details
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- Details
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