Pension Plans - Schedule of defined contribution expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Retirement Benefits [Abstract]
Defined contribution expense	$ 6,065	$ 6,253	$ 14,479	$ 15,049