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Shareholders' capital - Schedule of Preferred Shares (Details) $ / shares in Units, $ in Thousands, $ in Thousands	Dec. 31, 2024 USD ($) shares	Dec. 31, 2024 CAD ($) $ / shares shares	Apr. 01, 2024 $ / shares	Dec. 31, 2023 USD ($)
Stockholders Equity Note [Line Items]
Preferred shares | $	$ 184,299			$ 184,299
Series A Shares
Stockholders Equity Note [Line Items]
Preferred stock issued (in shares) | shares	4,800,000	4,800,000
Shares issued, price per share (USD and CAD per share) | $ / shares		$ 25
Preferred shares	$ 100,463	$ 116,546
Series D Shares
Stockholders Equity Note [Line Items]
Preferred stock issued (in shares) | shares	4,000,000	4,000,000
Shares issued, price per share (USD and CAD per share) | $ / shares			$ 25
Preferred shares	$ 83,836	$ 97,259

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Number of shares issued for nonredeemable preferred shares and preferred shares redeemable solely at option of issuer. Includes, but is not limited to, preferred shares issued, repurchased, and held as treasury shares. Excludes preferred shares classified as debt.

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Aggregate par or stated value of issued nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders' equity.

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Per share or per unit amount of equity securities issued.

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