Pension and Other Postretirement Benefits (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Jul. 31, 2022	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Pensions
Pension and other postretirement benefits expenses
Service cost		$ 5	$ 622	$ 340	$ 1,972
Interest cost		4,228	4,796	13,774	14,492
Expected return on plan assets		(6,959)	(7,453)	(21,942)	(22,436)
Amortization of prior service cost		14	88	41	258
Amortization of actuarial losses		547	402	1,747	1,240
Curtailment gain	$ 0		0	(1,204)	(668)
Settlement loss (gain)		0	0	2,980	(731)
Net periodic benefit income		(2,165)	(1,545)	(4,264)	(5,873)
Other Postretirement Benefits
Pension and other postretirement benefits expenses
Service cost		0	10	13	29
Interest cost		230	282	742	842
Amortization of prior service cost		0	3	0	8
Amortization of actuarial losses		(99)	(37)	(176)	(110)
Settlement loss (gain)		0	0	(250)	0
Net periodic benefit income		$ 131	$ 258	$ 329	$ 769