Other employee benefits (Tables)

12 Months Ended

Dec. 31, 2019

Other Employee Benefits [Abstract]

Disclosure of detailed information about other employee benefit plans [Table Text Block]

		Year ended
		Dec. 31, 2019			Dec. 31, 2018
Opening defined benefit obligation	$	93,528		$	107,829
Current service cost1		3,060			3,455
Past service cost		-			255
Interest cost		3,600			3,683
Effects of movements in exchange rates		4,864			(8,587	)
Remeasurement actuarial (gains)/losses:
Arising from changes in demographic assumptions		-			(9,996	)
Arising from changes in financial assumptions		14,094			2,809
Arising from experience adjustments		87			(3,472	)
Benefits paid		(2,537	)		(2,448	)
Closing defined benefit obligation	$	116,696		$	93,528

¹ Includes remeasurement of other long term employee benefits

Disclosure of detailed information about other employee benefit plans, balance by member group [Table Text Block]

		Dec. 31, 2019		Dec. 31, 2018
Active members	$	60,801	$	47,249
Inactive members		55,895		46,279
Closing defined benefit obligation	$	116,696	$	93,528

Disclosure of detailed information about changes in fair value of assets of other employee benefits plan [Table Text Block]

		Dec. 31, 2019			Dec. 31, 2018
Employer contributions	$	2,537		$	2,448
Benefits paid		(2,537	)		(2,448	)
Closing fair value of assets	$	-		$	-

Disclosure of detailed information about net benefit liability for other employee benefits [Table Text Block]

		Dec. 31, 2019		Dec. 31, 2018
Unfunded benefit obligation	$	116,696	$	93,528
Vacation accrual and other - non-current		2,888		2,664
Net liability	$	119,584	$	96,192

Disclosure of detailed information about other employee benefits plan [Table Text Block]

		Dec. 31, 2019		Dec. 31, 2018
Other employee benefits liability - current (note 14)	$	2,806	$	2,564
Other employee benefits liability - non-current		116,778		93,628
Net liability	$	119,584	$	96,192

Disclosure of detailed information about employee future benefit expense [Table Text Block]

		Dec. 31, 2019		Dec. 31, 2018
Current service cost 1	$	3,060	$	3,710
Net interest cost		3,600		3,683
Components recognized in consolidated income statements	$	6,660	$	7,393

¹ Includes remeasurement of other long term employee benefit

Disclosure of detailed information about remeasurement of other long term employee benefits [Table Text Block]

		Dec. 31, 2019		Dec. 31, 2018
Remeasurement on the net defined benefit liability:
Actuarial (gains)/losses arising from changes in demographic assumptions	$	-	$	(9,996	)
Actuarial (gains)/losses arising from changes in financial assumptions		14,094		2,809
Actuarial gains arising from changes experience adjustments		87		(3,472	)
Components recognized in statements of comprehensive income	$	14,181	$	(10,659	)

Total other employee future benefit cost $ 20,841 $ (3,266 )

Disclosure of detailed information about other employee benefit plan, assumptions used [Table Text Block]

	Dec. 31, 2019	Dec. 31, 2018
Defined benefit cost:
Discount rate	3.88 %	3.64 %
Initial weighted average health care trend rate	5.74 %	5.97 %
Ultimate weighted average health care trend rate	4.00 %	4.00 %
Average longevity at retirement age for current pensioners (years)1 :
Males	21.1	21.0
Females	23.9	23.7

	Dec. 31, 2019	Dec. 31, 2018
Defined benefit obligation:
Discount rate	3.17 %	3.88 %
Initial weighted average health care trend rate	5.68 %	5.74 %
Ultimate weighted average health care trend rate	4.00 %	4.00 %
Average longevity at retirement age for current pensioners (years)1 :
Males	21.2	21.1
Females	23.9	23.9
Average longevity at retirement age for current employees (future pensioners) (years)1 :
Males	23.1	23.0
Females	25.6	25.6

¹ CPM2014 Priv with CPM-B projection scale