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Stockholders' equity - Common stock - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	2 Months Ended	3 Months Ended	12 Months Ended
	Feb. 23, 2024	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Stockholders Equity Note
Cash dividends			$ 163,664	$ 163,693	$ 142,290
Common stock dividends per share cash paid			$ 2.27	$ 2.20	$ 1.75
Dividends Declared per Common Share		$ 0.62
Dividend payable, to be paid date		Jan. 02, 2024
Dividends payable, record date		Dec. 07, 2023
Dividends payable		$ 44,741	$ 44,741	$ 39,525	$ 35,900
Subsequent event
Stockholders Equity Note
Dividends Declared per Common Share	$ 0.62
Dividend payable, to be paid date	Apr. 01, 2024
Dividends payable, record date	Mar. 14, 2024