Pensions - Components of Pension Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Retirement Benefits [Abstract]
Interest cost	$ 3,624	$ 2,617	$ 10,460	$ 7,851
Expected return on assets	(3,224)	(2,890)	(10,201)	(8,670)
Settlement loss (gain)	62	0	(328)	(15)
Remeasurement loss (gain)	3,466	0	(5,226)	(164)
Net periodic pension cost (benefit)	$ 3,928	$ (273)	$ (5,295)	$ (998)