Stockholders' equity - Common stock - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended					6 Months Ended
	Mar. 31, 2025	Jun. 30, 2024		Jun. 30, 2023		Jun. 30, 2024		Jun. 30, 2023		Jul. 24, 2024	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Stockholders Equity Note [Line Items]
Cash dividends		$ 44,944	[1]	$ 39,663	[1]	$ 89,695	[2]	$ 79,249	[2]
Dividends Declared per Common Share		$ 0.62		$ 0.55		$ 1.24		$ 1.10
Dividend payable, to be paid date		Jul. 01, 2024
Dividends payable, record date		May 30, 2024
Stockholders' equity		$ 5,372,678		$ 4,565,009		$ 5,372,678		$ 4,565,009			$ 5,177,314	$ 5,146,953	$ 4,470,725	$ 4,093,425
Subsequent event
Stockholders Equity Note [Line Items]
Dividends Declared per Common Share	$ 0.70
Stock repurchase program authorized amount										$ 500,000

[1] Dividends declared per common share during the quarter   ended June 30, 2024 - $ 0.62   (2023 - $ 0.55 ).

[2] Dividends declared per common share during the six months   ended June 30, 2024 - $ 1.24   (2023 - $ 1.10 ).