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Financial instruments-Risk management and fair value - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disclosure of detailed information about financial instruments [line items]
Investments at fair value	$ 69,500	$ 107,800
Net change in fair value of derivatives	(4,325)	4,469	$ (98,347)
Debt including current maturities	$ 1,980,441	$ 1,670,807
Interest rate and cash flow risk
Disclosure of detailed information about financial instruments [line items]
Average interest rate on derivatives	100.00%
Change in interest expense	$ 9,100
Increase decrease in fair value of debt	$ 36,100
Currency risk
Disclosure of detailed information about financial instruments [line items]
Percentage of foreign exchange risk expenses	84.20%	83.60%	79.20%
Currency risk | U.S. dollars
Disclosure of detailed information about financial instruments [line items]
Percentage of foreign exchange risk revenue	67.50%	65.00%	64.30%
Fixed Rated Debt
Disclosure of detailed information about financial instruments [line items]
Debt including current maturities	$ 1,062,900
Variable Rated Debt
Disclosure of detailed information about financial instruments [line items]
Debt including current maturities	$ 917,500
Fuel derivative instruments
Disclosure of detailed information about financial instruments [line items]
Derivative instrument hypothetical increases percentage	10.00%
Fuel derivative instruments | 2023 projection
Disclosure of detailed information about financial instruments [line items]
Derivative instrument expense increase	$ 88,900

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Investments fair value disclosure.

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Percentage of foreign exchange risk revenue.

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- Definition

The amount of outstanding funds that the entity is obligated to repay.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

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The gains (losses) resulting from change in the fair value of derivatives recognised in profit or loss. [Refer: Derivatives [member]]

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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The increase (decrease) in the fair value of a credit derivative. [Refer: Credit derivative, fair value]

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