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Note 2 - Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2021
Notes Tables |
Property, Plant and Equipment [Table Text Block] |
|  | 2021 |  |  | 2020 |  |  | Estimated Life (Years) |
Land |  | $ | 156,169 |  |  | $ | 136,024 |  |  |  |  | – |  |
Buildings and improvements |  |  | 552,965 |  |  |  | 495,808 |  |  |  | 10 | – | 39 |
Leasehold improvements |  |  | 39,665 |  |  |  | 38,767 |  |  |  | 2 | – | 39 |
Machinery and shop equipment |  |  | 92,762 |  |  |  | 87,090 |  |  |  | 5 | – | 20 |
Furniture, fixtures and computers |  |  | 84,728 |  |  |  | 81,834 |  |  |  | 3 | – | 15 |
Transportation equipment |  |  | 103,611 |  |  |  | 96,319 |  |  |  | 3 | – | 15 |
Lease and rental vehicles |  |  | 947,318 |  |  |  | 905,465 |  |  |  | 1 | – | 8 |
Construction in progress |  |  | 6,664 |  |  |  | 2,989 |  |  |  |  |  |  |
Accumulated depreciation and amortization |  |  | (705,675 | ) |  |  | (640,577 | ) |  |  |  |  |  |
Total |  | $ | 1,278,207 |  |  | $ | 1,203,719 |  |  |  |  |  |  |
Schedule of Goodwill [Table Text Block] |
Balance December 31, 2020 |  | $ | 292,142 |
Acquisitions During 2021 |  |  | 78,189 |
Balance December 31, 2021 |  | $ | 370,331 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | 2021 |  |  | 2020 |  |  | 2019 |
Expected stock volatility |  |  | 36.03 | % |  |  | 33.11 | % |  |  | 31.29 | %
Weighted-average stock volatility |  |  | 36.03 | % |  |  | 33.11 | % |  |  | 31.29 | %
Expected dividend yield |  |  | 1.65 | % |  |  | 1.20 | % |  |  | 1.13 | %
Risk-free interest rate |  |  | 1.07 | % |  |  | 0.80 | % |  |  | 2.45 | %
Expected life (years) |  |  | 6.0 |  |  |  | 6.0 |  |  |  | 6.0 |
Weighted-average fair value of stock options granted |  | $ | 14.77 |  |  | $ | 6.36 |  |  | $ | 8.37 |

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