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Note 4 - Other Revenues (Tables) | 9 Months Ended
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Sep. 30, 2025
Notes Tables |
Schedule of Other Revenues [Table Text Block] |
|  | Three Months Ended September 30 |  |  | Nine Months Ended September 30 |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Rental income |  | $ | 6,177 |  |  | $ | 6,028 |  |  | $ | 18,800 |  |  | $ | 18,015 |
Management and accounting services fees |  |  | 4,115 |  |  |  | 4,226 |  |  |  | 12,623 |  |  |  | 12,744 |
Insurance services |  |  | 966 |  |  |  | 818 |  |  |  | 2,611 |  |  |  | 2,506 |
Other |  |  | 414 |  |  |  | 452 |  |  |  | 1,289 |  |  |  | 907 |
Total other revenues |  | $ | 11,672 |  |  | $ | 11,524 |  |  | $ | 35,323 |  |  | $ | 34,172 |

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- Definition Tabular disclosure of the detailed components of other operating revenues. + References No definition available. + Details
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Namespace Prefix: | nhc_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration