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v3.25.1

Note 9 - Investments in Marketable Securities (Tables) | 3 Months Ended
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Mar. 31, 2025
Notes Tables |
Marketable Securities [Table Text Block] |
|  | March 31, 2025 |  |  | December 31, 2024 |
|  | Book Value |  |  | Fair Value |  |  | Book Value |  |  | Fair Value |
Investments available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Marketable equity securities |  | $ | 30,176 |  |  | $ | 152,785 |  |  | $ | 30,176 |  |  | $ | 140,064 |
Restricted investments available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Marketable equity securities |  |  | 18,779 |  |  |  | 21,697 |  |  |  | 18,534 |  |  |  | 23,190 |
Corporate debt securities |  |  | 58,006 |  |  |  | 57,223 |  |  |  | 58,927 |  |  |  | 57,471 |
Asset-based securities |  |  | 15,306 |  |  |  | 14,263 |  |  |  | 15,593 |  |  |  | 14,410 |
U.S. Treasury securities |  |  | 46,814 |  |  |  | 44,952 |  |  |  | 46,811 |  |  |  | 44,186 |
State and municipal securities |  |  | 3,762 |  |  |  | 3,729 |  |  |  | 3,787 |  |  |  | 3,737 |
|  | $ | 172,843 |  |  | $ | 294,649 |  |  | $ | 173,828 |  |  |  | 283,058 |
Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] |
|  | March 31, 2025 |  |  | December 31, 2024 |
|  | Shares |  |  | Cost |  |  | Fair Value |  |  | Shares |  |  | Cost |  |  | Fair Value |
NHI Common Stock |  |  | 1,630,642 |  |  | $ | 24,734 |  |  | $ | 120,439 |  |  |  | 1,630,642 |  |  | $ | 24,734 |  |  | $ | 113,003 |
Investments Classified by Contractual Maturity Date [Table Text Block] |
|  | March 31, 2025 |  |  | December 31, 2024 |
|  | Cost |  |  | Fair Value |  |  | Cost |  |  | Fair Value |
Maturities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Within 1 year |  | $ | 24,655 |  |  | $ | 24,424 |  |  | $ | 25,707 |  |  | $ | 25,317 |
1 to 5 years |  |  | 66,455 |  |  |  | 64,280 |  |  |  | 66,117 |  |  |  | 63,379 |
6 to 10 years |  |  | 32,208 |  |  |  | 31,019 |  |  |  | 32,648 |  |  |  | 30,606 |
Over 10 years |  |  | 570 |  |  |  | 444 |  |  |  | 646 |  |  |  | 502 |
|  | $ | 123,888 |  |  | $ | 120,167 |  |  | $ | 125,118 |  |  | $ | 119,804 |

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