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OTHER INCOME (EXPENSES) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
OTHER INCOME (EXPENSE)
Unrealized and realized gain (loss) on investments (note 4)	$ 3,220	$ (24)	$ 4,972	$ (3,293)
Foreign currency (loss) gain	1,616	1,159	1,242	3,568
Other income	71		203	617
Loss on sale of assets	(134)		(134)	(99)
Total other income (expense)	$ 4,773	$ 1,135	$ 6,283	$ 793

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Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

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