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ACCUMULATED OTHER COMPREHENSIVE LOSS
 12 Months Ended
Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
ACCUMULATED OTHER COMPREHENSIVE LOSS
26.
ACCUMULATED OTHER COMPREHENSIVE LOSS

Accumulated Other Comprehensive Loss

As at December 31, 2018, 2017 and 2016, our accumulated other comprehensive loss balances consisted of the following components:
 
Pension and post retirement benefit plan adjustments
Share of affiliates comprehensive (loss) income
Total accumulated comprehensive (loss) income
Balance at December 31, 2015
(12,400
)
(192
)
(12,592
)
Other comprehensive (loss) income
(556
)
3,606

3,050

Balance at December 31, 2016
(12,956
)
3,414

(9,542
)
Other comprehensive income
157

1,616

1,773

Balance at December 31, 2017
(12,799
)
5,030

(7,769
)
Other comprehensive income (loss)
3,581

(24,324
)
(20,743
)
Balance at December 31, 2018
(9,218
)
(19,294
)
(28,512
)