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Consolidated statements of comprehensive income - CAD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Consolidated statements of comprehensive income [Abstract] |  |  |
Profit (loss) |  | $ (53,197) | $ 73,941
Items that will not be reclassified to net earnings: |  |  |
Remeasurements of defined benefit liability | [1] | (4,959) | (8,112)
Equity investments at FVOCI - net change in fair value | [2] | 16,986 | (4,044)
Equity instruments at FVOCI - net change in fair value - equity-accounted investee |  | (39) | (709)
Items that are or may be reclassified to net earnings: |  |  |
Exchange differences on translation of foreign operations |  | 26,807 | (27,888)
Other comprehensive loss, net of taxes |  | 38,795 | (40,753)
Total comprehensive income (loss) |  | (14,402) | 33,188
Other comprehensive income (loss) attributable to: |  |  |
Equity holders |  | 38,799 | (40,740)
Non-controlling interest |  | (4) | (13)
Other comprehensive loss for the year |  | 38,795 | (40,753)
Total comprehensive income (loss) attributable to: |  |  |
Equity holders |  | (14,370) | 33,260
Non-controlling interest |  | (32) | (72)
Total comprehensive income (loss) for the year |  | (14,402) | 33,188
Income tax on remeasurement of defined benefit liability |  | 1,463 | 2,301
Income tax on equity investments at FVOCI - net change in fair value |  | $ (2,469) | $ 453
[1] | Net of tax ( 2020 - $ 1,463 ; 2019 - $ 2,301 )
[2] | Net of tax ( 2020 - $( 2,469 ) ; 2019 - $ 453 )

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