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Share Capital - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended
	Apr. 21, 2026	Jun. 01, 2018	Mar. 31, 2026	Mar. 31, 2025	Sep. 23, 2025
Selling, General and Administrative Expense			$ 102,911	$ 100,793
Issuance of shares under business combinations and investments, value				$ 630
Restricted Stock Units (RSUs) [Member]
Cost Not yet Recognized, Amount			$ 50,546
Cost Not yet Recognized, Period for Recognition			1 year 7 months 2 days
Multiple Voting Shares [Member] \| Conversion Of Multiple Voting Shares [member]
Voting Rights			100
Subordinate Voting Shares [Member] \| GTII Stock and Incentive Plan [Member]
Percentage of maximum number of shares issued under the plan		15.00%
Super Voting Shares [Member] \| Conversion Of Super Voting Shares [member]
Voting Rights			1,000
Repurchase of Subordinate Voting Shares [Member]
Share Repurchase Program, Authorized, Number of Shares			6,045,000
Accelerated Share Repurchases, Final Price Paid Per Share			$ 5.51
Share Repurchase Program, Authorized, Amount			$ 33,300		$ 50,000
Repurchase of Subordinate Voting Shares [Member] \| Subsequent Event [Member]
Share Repurchase Program, Authorized, Number of Shares	7,393,787
Accelerated Share Repurchases, Final Price Paid Per Share	$ 6
Share Repurchase Program, Authorized, Amount	$ 150,000