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Equity (Narrative) (Details) |  |  |  |  |  |  | 12 Months Ended | 24 Months Ended
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Nov. 09, 2022 shares | Jul. 15, 2022 USD ($) shares | Nov. 12, 2020 USD ($) shares | Nov. 04, 2020 USD ($) shares | Mar. 11, 2020 shares | Feb. 10, 2020 USD ($) $ / shares shares | Dec. 31, 2022 USD ($) item shares | Dec. 31, 2021 USD ($) shares | Dec. 31, 2020 USD ($) shares | Jan. 02, 2020 USD ($) shares | Dec. 31, 2019 | Dec. 31, 2020
Disclosure Of Share capital [Line items] |  |  |  |  |  |  |  |  |  |  |  |
Purchase of treasury shares | $ |  |  |  | $ 938,000 |  | $ 3,071,000 | $ 36,265,000 | $ 11,841,000 |  |  |  |
Treasury Stock Purchased, Shares |  |  |  |  |  | 316,445 | 2,743,722 | 960,454 | 101,986 |  |  |
Percentage of number of shares repurchase | 10.00% |  |  | 10.00% |  | 10.00% |  |  |  |  |  |
Maximum shares can buyback | 5,854,285 |  |  | 6,062,000 |  | 5,930,000 |  |  |  |  |  |
Number of share options granted in share-based payment arrangement | item |  |  |  |  |  |  | 1,096,685 |  |  |  |  |
Stock dividend per share | $ / shares |  |  |  |  |  | $ 0.004 |  |  |  |  |  |
Dividend distributed during the period shares |  |  |  |  | 242,650 |  |  |  |  |  |  |
Share Capital [Member]. |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Share capital [Line items] |  |  |  |  |  |  |  |  |  |  |  |
Share capital | $ |  |  |  |  |  |  |  |  | $ 4,352,000 |  |  |
Share Premium [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Share capital [Line items] |  |  |  |  |  |  |  |  |  |  |  |
Share premium, common shares issued to key management | $ |  |  |  |  |  |  |  |  |  | $ 4,668,000 |  |
Non Executive Directors [Member] | Share Capital [Member]. |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Share capital [Line items] |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued during the period |  |  |  |  |  |  | 75,636 | 64,269 | 60,204 |  |  |
Non Executive Directors [Member] | Share Premium [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Share capital [Line items] |  |  |  |  |  |  |  |  |  |  |  |
Share premium, common shares issued to Non-Executive Directors | $ |  |  |  |  |  |  | $ 1,040,000 | $ 861,000 | $ 665,000 |  |  |
Former Chief Executive Officer [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Share capital [Line items] |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued during the period |  | 52,058 |  |  |  |  |  | 104,439 |  |  |  |
Share Premium, Common Shares Issued To Former Chief Executive Officer | $ |  | $ 800,000 |  |  |  |  |  | $ 800,000 |  |  |  |
Employee Benefit Trust [Member] | Share Capital [Member]. |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Share capital [Line items] |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued during the period |  |  | 499,614 |  |  |  |  |  |  |  |  |
Share capital | $ |  |  | $ 1,000 |  |  |  |  |  |  |  |  |
Employee Benefit Trust [Member] | Share Premium [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Share capital [Line items] |  |  |  |  |  |  |  |  |  |  |  |
Share Premium, Common Shares Issued To Employees | $ |  |  | $ 4,351,000 |  |  |  |  |  |  |  |  |
Management [Member] | Share Capital [Member]. |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Share capital [Line items] |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued during the period |  |  |  |  |  |  |  |  |  | 2,976,781 |  |
Director | Share Capital [Member]. |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Share capital [Line items] |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued during the period |  |  |  |  |  |  |  |  |  | 878,150 |  |
Value Creation Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Share capital [Line items] |  |  |  |  |  |  |  |  |  |  |  |
Share based compensation arrangement shares vesting percentage |  |  |  |  |  |  |  |  | 50.00% |  | 50.00% | 50.00%

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