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Consolidated Statements of Comprehensive Income Statement - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Statement of comprehensive income [abstract] |  |
Net earnings for the period | $ 12,041 | $ 123,451
Items that may be reclassified subsequently to net earnings: |  |
Unrealized net gains on short-term investments (net of $nil tax in 2018 and 2017) | 993 | 810
Reclassification adjustment for realized (gains) losses on short-term investments to earnings | (788) | 361
Total comprehensive earnings for the year | 12,246 | 124,622
Total comprehensive earnings attributable to: |  |
Equity holders of the Company | 10,499 | 122,162
Non-controlling interests | $ 1,747 | $ 2,460

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