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Note 13 - Common Shares - Share Repurchases (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Stock Repurchased and Retired During Period, Shares (in shares) 0 70,238 101,816
Stock Repurchased and Retired During Period, Value $ 0 $ 3,281 $ 4,986
Average price per share (in dollars per share) $ 0 $ 46.70 $ 48.97
Number of shares (in shares) 45,824 48,013 21,332
Aggregate market value of shares (in thousands) $ 3,669 $ 2,957 $ 1,510
Average price per share (in dollars per share) $ 80.07 $ 61.58 $ 70.77