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Income and other taxes (Tables) | 12 Months Ended
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Dec. 31, 2019
Income Taxes [Abstract] |
Components of income tax expense | Income tax expense:
For the years ended December 31 | 2019 |  | 2018 |
Current tax recovery (expense): |  |
Current period before undernoted items | $ | (38,953 | ) | $ | (117,496 | )
Benefit from unrecognised loss carry forwards | — |  | 23,860 |
Adjustments to prior years | 144 |  | 2,609 |
| (38,809 | ) | (91,027 | )
Deferred tax recovery (expense): |  |
Origination and reversal of temporary differences | 31,389 |  | (56,258 | )
Adjustments to prior years | (138 | ) | (2,331 | )
Changes in tax rates | 2,141 |  | 35 |
Other | 943 |  | (3,910 | )
| 34,335 |  | (62,464 | )
Total income tax expense | $ | (4,474 | ) | $ | (153,491 | )
Reconciliation of accounting profit multiplied by applicable tax rates | Income tax expense differs from the amounts that would be obtained by applying the Canadian statutory income tax rate to net income before income taxes as follows:
For the years ended December 31 | 2019 |  | 2018 |
Income before income taxes | $ | 120,840 |  | $ | 811,475 |
Deduct earnings of associate | (52,218 | ) | (72,001 | )
| 68,622 |  | 739,474 |
Canadian statutory tax rate | 26.8 | % | 27.0 | %
Income tax expense calculated at Canadian statutory tax rate | (18,411 | ) | (199,658 | )
Decrease (increase) in income tax expense resulting from: |  |
Impact of income and losses taxed in foreign jurisdictions | 7,001 |  | 15,754 |
Utilization of unrecognised loss carryforwards and temporary differences | 6,945 |  | 31,325 |
Impact of tax rate changes | 2,141 |  | 35 |
Impact of foreign exchange | (484 | ) | (173 | )
Other business taxes | (2,798 | ) | (7,750 | )
Impact of non-taxable recovery items | 1,826 |  | 7,015 |
Adjustments to prior years | 6 |  | 278 |
Other | (700 | ) | (317 | )
Total income tax expense | $ | (4,474 | ) | $ | (153,491 | )
Effect of temporary difference, unused tax losses and unused tax credits and analysis of change in deferred income tax liabilities | Analysis of the change in deferred income tax assets and liabilities:
|  | 2019 |  |  |  | 2018 |
| Net |  | Deferred tax assets |  | Deferred tax liabilities |  |  | Net |  | Deferred tax assets |  | Deferred tax liabilities |
Balance, January 1 | $ | (221,682 | ) | $ | 59,532 |  | $ | (281,214 | ) |  | $ | (164,091 | ) | $ | 102,341 |  | $ | (266,432 | )
Adjustment on adoption of IFRS 16 | 4,529 |  | 533 |  | 3,996 |  |  | — |  | — |  | — |
Balance, January 1 (restated) | (217,153 | ) | 60,065 |  | (277,218 | ) |  | (164,091 | ) | 102,341 |  | (266,432 | )
Deferred income tax recovery (expense) included in net income | 34,335 |  | 28,875 |  | 5,460 |  |  | (62,464 | ) | (44,277 | ) | (18,187 | )
Deferred income tax recovery included in other comprehensive income | 22,049 |  | 21,871 |  | 178 |  |  | 3,980 |  | 1,253 |  | 2,727 |
Other | (437 | ) | 803 |  | (1,240 | ) |  | 893 |  | 215 |  | 678 |
Balance, December 31 | $ | (161,206 | ) | $ | 111,614 |  | $ | (272,820 | ) |  | $ | (221,682 | ) | $ | 59,532 |  | $ | (281,214 | )
As at December 31, 2019, deferred income tax assets have been recognized in respect of non-capital loss carryforwards generated in the United States. These loss carryforwards expire as follows:
| Dec 31 2019
| Gross amount |  | Tax effect |
Expire |  |
Losses generated in 2015 (expires 2035) | $ | 333,240 |  | $ | 76,645 |
Losses generated in 2016 (expires 2036) | 432,581 |  | 99,494 |
Losses generated in 2017 (expires 2037) | 234,941 |  | 54,036 |
| 1,000,762 |  | 230,175 |
No expiry |  |
Losses generated in 2019 | 242,734 |  | 55,829 |
Total non-capital loss carryforwards | $ | 1,243,496 |  | $ | 286,004 |
The tax effect of temporary differences that give rise to deferred income tax liabilities and deferred income tax assets are as follows:
As at |  | Dec 31, 2019 |  |  | Jan 1, 2019
| Net |  | Deferred tax assets |  | Deferred tax liabilities |  |  | Net |  | Deferred tax assets |  | Deferred tax liabilities |
Property, plant and equipment (owned) | $ | (447,077 | ) | $ | (250,890 | ) | $ | (196,187 | ) |  | $ | (425,743 | ) | $ | (212,087 | ) | $ | (213,656 | )
Right-of-use assets | (45,501 | ) | (26,725 | ) | (18,776 | ) |  | (53,400 | ) | (39,600 | ) | (13,800 | )
Repatriation taxes | (93,363 | ) | — |  | (93,363 | ) |  | (94,446 | ) | — |  | (94,446 | )
Other | (10,424 | ) | (48 | ) | (10,376 | ) |  | (14,930 | ) | (6,700 | ) | (8,230 | )
| (596,365 | ) | (277,663 | ) | (318,702 | ) |  | (588,519 | ) | (258,387 | ) | (330,132 | )
Non-capital loss carryforwards | 286,004 |  | 286,004 |  | — |  |  | 233,237 |  | 233,237 |  | — |
Lease obligations | 56,802 |  | 33,979 |  | 22,823 |  |  | 63,415 |  | 45,239 |  | 18,176 |
Share-based compensation | 3,075 |  | — |  | 3,075 |  |  | 10,908 |  | 1,170 |  | 9,738 |
Other | 89,278 |  | 69,294 |  | 19,984 |  |  | 63,806 |  | 38,806 |  | 25,000 |
| 435,159 |  | 389,277 |  | 45,882 |  |  | 371,366 |  | 318,452 |  | 52,914 |
Net deferred income tax assets (liabilities) | $ | (161,206 | ) | $ | 111,614 |  | $ | (272,820 | ) |  | $ | (217,153 | ) | $ | 60,065 |  | $ | (277,218 | )
The table below shows the impact of the adjustment on adoption of IFRS 16 and new presentation to the December 31, 2018 finance lease balances:
As at |  | Jan 1, 2019 |  |  | Dec 31, 2018
| Net |  | Deferred tax assets |  | Deferred tax liabilities |  |  | Net |  | Deferred tax assets |  | Deferred tax liabilities |
Property, plant and equipment (owned) | $ | (425,743 | ) | $ | (212,087 | ) | $ | (213,656 | ) |  | $ | (425,743 | ) | $ | (212,087 | ) | $ | (213,656 | )
Right-of-use assets | (53,400 | ) | (39,600 | ) | (13,800 | ) |  | — |  | — |  | — |
Repatriation taxes | (94,446 | ) | — |  | (94,446 | ) |  | (94,446 | ) | — |  | (94,446 | )
Other | (14,930 | ) | (6,700 | ) | (8,230 | ) |  | (14,930 | ) | (6,700 | ) | (8,230 | )
| (588,519 | ) | (258,387 | ) | (330,132 | ) |  | (535,119 | ) | (218,787 | ) | (316,332 | )
Non-capital loss carryforwards | 233,237 |  | 233,237 |  | — |  |  | 233,237 |  | 233,237 |  | — |
Lease obligations | 63,415 |  | 45,239 |  | 18,176 |  |  | — |  | — |  | — |
Share-based compensation | 10,908 |  | 1,170 |  | 9,738 |  |  | 10,908 |  | 1,170 |  | 9,738 |
Other | 63,806 |  | 38,806 |  | 25,000 |  |  | 69,292 |  | 43,912 |  | 25,380 |
| 371,366 |  | 318,452 |  | 52,914 |  |  | 313,437 |  | 278,319 |  | 35,118 |
Net deferred income tax assets (liabilities) | $ | (217,153 | ) | $ | 60,065 |  | $ | (277,218 | ) |  | $ | (221,682 | ) | $ | 59,532 |  | $ | (281,214 | )

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