Pension and Other Postretirement Benefits - Other Postretirement Benefits (Details) - Other Postretirement Benefit Plan - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Pension Benefits
Service cost	$ 4	$ 8	$ 12	$ 25
Interest cost	272	375	816	1,126
Amortization of actuarial loss	174	486	522	1,455
Net periodic pension (income)/cost or postretirement benefit cost	$ 450	$ 869	$ 1,350	$ 2,606