Dividends (Details) - Class A Common Stock $ / shares in Units, $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2024 USD ($) dividend $ / shares	Dec. 31, 2023 USD ($) dividend $ / shares
Number of quarterly cash dividends declared | dividend	2	4
Number of special dividends declared | dividend		1
Cash dividend paid (in dollars per share) | $ / shares	$ 1.10
Cash and special dividend (in dollars per share) | $ / shares		$ 3.00
Dividends | $	$ 6.9	$ 18.6