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Note 8 - Goodwill and Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2021
Notes Tables |
Schedule of Goodwill [Table Text Block] |
|  |  |  |  |  | Accumulated |  |  |  |  |
|  |  |  |  |  | Impairment |  |  |  |  |
|  | Goodwill |  |  | Losses |  |  | Total |
Balance as of December 31, 2021 |  | $ | 233.9 |  |  | $ | (40.8 | ) |  | $ | 193.1 |
Divestiture |  |  | (1.7 | ) |  |  | — |  |  |  | (1.7 | )
Foreign currency fluctuations |  |  | (13.9 | ) |  |  | 0.9 |  |  |  | (13.0 | )
Balance as of December 31, 2020 |  | $ | 249.5 |  |  | $ | (41.7 | ) |  | $ | 207.8 |
Foreign currency fluctuations |  |  | 14.4 |  |  |  | (1.7 | ) |  |  | 12.7 |
Balance as of December 31, 2019 |  | $ | 235.1 |  |  | $ | (40.0 | ) |  | $ | 195.1 |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
|  | Customer |  |  | Trade |  |  |  |  |  |  |  |  |
|  | Lists |  |  | Names |  |  | Technology |  |  | Total |
Balance as of December 31, 2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Original cost |  | $ | 155.4 |  |  | $ | 30.3 |  |  | $ | 17.0 |  |  | $ | 202.7 |
Accumulated amortization |  |  | (80.0 | ) |  |  | (13.9 | ) |  |  | (10.8 | ) |  |  | (104.7 | )
Carrying amount |  | $ | 75.4 |  |  | $ | 16.4 |  |  | $ | 6.2 |  |  | $ | 98.0 |
Weighted-average original life (in years) |  |  | 15 |  |  |  | 11 |  |  |  | 11 |  |  |  |  |
Balance as of December 31, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Original cost |  | $ | 166.2 |  |  | $ | 34.4 |  |  | $ | 17.9 |  |  | $ | 218.5 |
Accumulated amortization |  |  | (70.3 | ) |  |  | (12.3 | ) |  |  | (9.7 | ) |  |  | (92.3 | )
Carrying amount |  | $ | 95.9 |  |  | $ | 22.1 |  |  | $ | 8.2 |  |  | $ | 126.2 |
Weighted-average original life (in years) |  |  | 15 |  |  |  | 11 |  |  |  | 11 |  |  |  |  |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
2022 |  | $ | 16.9 |
2023 |  |  | 15.4 |
2024 |  |  | 13.9 |
2025 |  |  | 12.5 |
2026 |  |  | 11.1 |
Thereafter |  |  | 28.2 |
Total |  | $ | 98.0 |

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