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Note 8 - Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2025
Notes Tables |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | Three Months Ended September 30 |  |  | Nine Months Ended September 30 |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Basic: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average common shares outstanding |  |  | 15,484,464 |  |  |  | 15,411,680 |  |  |  | 15,461,804 |  |  |  | 15,384,758 |
Net income attributable to National HealthCare Corporation |  | $ | 39,239 |  |  | $ | 42,789 |  |  | $ | 95,166 |  |  | $ | 95,846 |
Earnings per common share, basic |  | $ | 2.53 |  |  | $ | 2.78 |  |  | $ | 6.15 |  |  | $ | 6.23 |
Diluted: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average common shares outstanding |  |  | 15,484,464 |  |  |  | 15,411,680 |  |  |  | 15,461,804 |  |  |  | 15,384,758 |
Effects of dilutive instruments |  |  | 180,066 |  |  |  | 255,641 |  |  |  | 151,701 |  |  |  | 191,536 |
Weighted average common shares outstanding |  |  | 15,664,530 |  |  |  | 15,667,321 |  |  |  | 15,613,505 |  |  |  | 15,576,294 |
Net income attributable to National HealthCare Corporation |  | $ | 39,239 |  |  | $ | 42,789 |  |  | $ | 95,166 |  |  | $ | 95,846 |
Earnings per common share, diluted |  | $ | 2.50 |  |  | $ | 2.73 |  |  | $ | 6.10 |  |  | $ | 6.15 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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