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Share-Based Payment (Schedule of Number and Weighted Average Exercise Prices of Share Options) (Details) | 12 Months Ended
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Dec. 31, 2021 $ / shares | Dec. 31, 2020 $ / shares | Dec. 31, 2019 $ / shares
Number of Options |  |  |
Outstanding at beginning of year | 31,135 | 34,886 | 27,169
Granted | 37,000 | 4,249 | 18,303
Exercised | (18,451) | (8,000) | (3,586)
Expired | (1,000) | 0 | (7,000)
Outstanding at end of year | 48,684 | 31,135 | 34,886
Exercisable at end of year | 6,749 | 17,018 | 16,583
Weighted Average Exercise Price |  |  |
Outstanding at beginning of year | $ 12.94 | $ 9.83 | $ 7.82
Granted | 29.27 | 28.91 | 11.41
Exercised | 10.06 | 7.87 | 6.27
Expired | 26.63 | 0 | 8.25
Outstanding at end of year | 26.16 | 12.94 | 9.83
Exercisable at end of year | $ 20.05 | $ 6.3 | $ 8.09

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