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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2021
Income taxes |
Schedule of Effective Income Tax Rate Reconciliation | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Year ended December 31, |  | 2021 |  | 2020 |  | 2019 |
Earnings before income tax | ​ | $ | 205,232 | ​ | $ | 235,888 | ​ | $ | 190,763 | ​
Statutory federal and provincial tax rate in British Columbia, Canada | ​ |  | 27.00 | % |  | 27.00 | % |  | 27.00 | %
Expected income tax expense | ​ | $ | 55,413 | ​ | $ | 63,690 | ​ | $ | 51,506 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Non-deductible expenses | ​ |  | 7,854 | ​ |  | 4,732 | ​ |  | 3,705 | ​
Adjustment to prior year provision to statutory tax returns | ​ |  | (1,826) | ​ |  | (865) | ​ |  | 4 | ​
Changes in the valuation of deferred tax assets | ​ |  | (355) | ​ |  | (2,027) | ​ |  | (550) | ​
Different tax rates of subsidiaries operating in foreign jurisdictions | ​ |  | (6,257) | ​ |  | (12,016) | ​ |  | (11,818) | ​
U.S. tax reform impacts | ​ |  | 3,584 | ​ |  | 17,105 | ​ |  | 6,949 | ​
Change in enacted tax rates | ​ |  | 121 | ​ |  | 391 | ​ |  | (1,016) | ​
Derecognition of deferred tax asset from purchase price adjustment | ​ |  | 947 | ​ |  | — | ​ |  | — | ​
Unrecognized tax benefits | ​ |  | (474) | ​ |  | 817 | ​ |  | (2,347) | ​
Benefits of deductible stock options vested and exercised | ​ |  | (2,121) | ​ |  | (4,070) | ​ |  | (1,780) | ​
Deductions for tax purposes in excess of accounting expenses | ​ |  | (2,709) | ​ | ​ | (1,831) | ​ | ​ | (287) | ​
Other | ​ |  | (799) | ​ |  | (396) | ​ |  | (2,743) | ​
​ | ​ | $ | 53,378 | ​ | $ | 65,530 | ​ | $ | 41,623 | ​
Summary of Income Tax Expense (Recovery) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Year ended December 31, |  | 2021 |  | 2020 |  | 2019
Canadian: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Current tax expense | ​ | $ | 21,664 | ​ | $ | 27,766 | ​ | $ | 19,752
Deferred tax expense | ​ |  | 5,639 | ​ |  | 3,970 | ​ |  | 3,346
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Foreign: | ​ |  |  | ​ |  |  | ​ |  |
Current tax expense before application of operating loss carryforwards | ​ |  | 30,093 | ​ |  | 30,280 | ​ |  | 24,815
Tax benefit of operating loss carryforwards | ​ |  | (2,238) | ​ |  | (1,668) | ​ |  | (11,770)
Total current tax expense | ​ |  | 27,855 | ​ |  | 28,612 | ​ |  | 13,045
Deferred tax expense before adjustment | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
to opening valuation allowance | ​ |  | (1,781) | ​ |  | 6,127 | ​ |  | 5,727
Adjustment to opening valuation allowance | ​ |  | 1 | ​ |  | (945) | ​ |  | (247)
Total deferred tax (recovery) expense | ​ |  | (1,780) | ​ |  | 5,182 | ​ |  | 5,480
​ | ​ | $ | 53,378 | ​ | $ | 65,530 | ​ | $ | 41,623
Schedule of Deferred Tax Assets and Liabilities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
As at December 31, |  | 2021 |  | 2020
Deferred tax assets: |  | ​ |  |  | ​ |
Working capital | ​ | $ | 16,622 | ​ | $ | 13,185
Property, plant and equipment | ​ |  | 6,098 | ​ |  | 6,467
Share-based compensation | ​ |  | 5,661 | ​ |  | 5,606
Tax losses and tax credit carryforwards | ​ |  | 31,001 | ​ |  | 25,943
Lease liabilities | ​ | ​ | 28,769 | ​ | ​ | 29,393
Other | ​ |  | 7,336 | ​ |  | 8,848
​ | ​ |  | 95,487 | ​ |  | 89,442
Deferred tax liabilities: | ​ |  |  | ​ |  |
Property, plant and equipment | ​ | $ | (18,305) | ​ | $ | (16,838)
Goodwill | ​ |  | (7,382) | ​ |  | (2,255)
Intangible assets | ​ |  | (66,320) | ​ |  | (52,218)
Right-of-use assets | ​ | ​ | (25,606) | ​ | ​ | (26,206)
Long-term debt | ​ | ​ | (3,605) | ​ | ​ | (3,571)
Other | ​ |  | (5,932) | ​ |  | (7,165)
​ | ​ |  | (127,150) | ​ |  | (108,253)
Net deferred tax liabilities | ​ | $ | (31,663) | ​ | $ | (18,811)
​ | ​ | ​ | ​ | ​ | ​ | ​
Valuation allowance | ​ |  | (13,162) | ​ |  | (12,995)
​ | ​ | $ | (44,825) | ​ | $ | (31,806)
Schedule of Non-capital Loss Carryforwards | ​
​ | ​ | ​ | ​
2022 |  | $ | 3,330
2023 | ​ |  | 4,304
2024 | ​ |  | 189
2025 | ​ |  | 122
2026 and thereafter | ​ |  | 73,009
​ | ​ | $ | 80,954
Schedule of Unrecognized Tax Benefits | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
As at December 31, |  | 2021 |  | 2020
Unrecognized tax benefits, beginning of year | ​ | $ | 20,298 | ​ | $ | 20,232
Increases - tax positions taken in prior period | ​ |  | 452 | ​ |  | 1,487
Increases - tax positions taken in current period | ​ |  | 1,077 | ​ |  | 558
Settlement and lapse of statute of limitations | ​ |  | (3,303) | ​ |  | (2,591)
Currency translation adjustment | ​ |  | 335 | ​ |  | 612
Unrecognized tax benefits, end of year | ​ | $ | 18,859 | ​ | $ | 20,298

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