Related party transactions - Related party transactions with affiliated company - Equity Method - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Related Party Transaction
Equity investment	$ 250,489,000		$ 251,537,000
BHD LEON
Related Party Transaction
Ownership interest	15.63%
Equity investment	$ 238,500,000		$ 239,500,000
Earnings (losses) from investments in equity method investees	1,000,000.0	$ 7,300,000
Equity Method Investment Dividends	0	0
Other Comprehensive income related to foreign currency translation adjustments and changes in the fair value of available for sale securities	(9,700,000)	(4,100,000)
Net impact to net earnings	$ 8,700,000	$ 11,400,000

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

- Definition

Amount of income (loss) for proportionate share of equity method investee's income (loss).

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