Other financial assets

12 Months Ended

Dec. 31, 2017

Statement [Line Items]

Other financial assets [text block]

9. Other financial assets

		Dec. 31, 2017		Dec. 31, 2016
Current
Derivative assets	$	2,841	$	3,397
Non-current
Available-for-sale investments		21,973		13,508
Investments at fair value through profit or loss		282		192
Restricted cash (note 26d)		206		17,148
		22,461		30,848
	$	25,302	$	34,245

Available-for-sale investments

Available-for-sale investments consist of investments in Canadian metals and mining companies, most of which are publicly traded. During the years ended December 31, 2017 and 2016, the Group recognized impairment losses on investments in listed shares and transferred pre-tax losses of $2,059 and $1,102, respectively, from the available-for-sale reserve within equity to the consolidated income statements (note 5f).

The following table summarizes the change in available-for-sale investments:

		Dec. 31, 2017			Dec. 31, 2016
Balance, beginning of year	$	13,508		$	9,206
Additions		5,265			2,857
Increase from remeasurement to fair value		2,507			3,598
Disposals		(229	)		(2,206	)
Effect of movements in exchange rates		922			53
Balance, end of year	$	21,973		$	13,508