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Note 20 - Subsequent Events (Details Textual) - USD ($) $ / shares in Units, $ in Thousands |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Aug. 05, 2021 | Jun. 30, 2021 | Jun. 30, 2021 | Jun. 30, 2020
Treasury Stock, Shares, Acquired (in shares) |  |  | 1,532,406 |
Treasury Stock Acquired, Average Cost Per Share (in dollars per share) |  |  | $ 41.46 |
Treasury Stock, Value, Acquired, Cost Method |  | $ 63,529 | $ 63,529 | $ 12,880
Subsequent Event [Member] |  |  |  |
Treasury Stock, Shares, Acquired (in shares) | 300,075 |  |  |
Treasury Stock Acquired, Average Cost Per Share (in dollars per share) | $ 38.23 |  |  |
Treasury Stock, Value, Acquired, Cost Method | $ 11,500 |  |  |

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