Benefit Plans - Amounts Recognized in Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Pension Plan
Amounts arising during the year:
Net (gain) loss on pension assets	$ (3,246)	$ 24,047	$ 3,581
Net loss (gain) on pension obligations	4,851	(38,949)	(4,614)
Reclassification adjustments recognized as components of net periodic benefit cost during the year:
Net (gain) loss	(2,818)	(5,643)	(6,961)
Amount recognized in other comprehensive (loss) income	(1,213)	(20,545)	(7,994)
Other Benefits
Amounts arising during the year:
Net loss (gain) on pension obligations	(542)	(5,808)	(2,074)
Reclassification adjustments recognized as components of net periodic benefit cost during the year:
Net (gain) loss	1,676	497	48
Amount recognized in other comprehensive (loss) income	$ 1,134	$ (5,311)	$ (2,026)