Benefit Plans - Net Periodic Benefit Cost Credit (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Components of net periodic benefit cost (income):
Interest cost	$ 3,666	$ 2,885
(Gain) loss on settlement	0	163
Pension Plan
Components of net periodic benefit cost (income):
Interest cost	3,666	2,885	$ 2,030
Expected return on plan assets	(3,545)	(4,013)	(2,494)
(Gain) loss on settlement	0	163	(65)
Total net periodic benefit cost (income)	121	(965)	(529)
Other changes recognized in OCI:
Net actuarial (gain) loss	(350)	3,476	(1,533)
Reclassification of gain (loss) on settlement	0	(163)	65
(Gain) loss recognized in OCI	(350)	3,313	(1,468)
Total recognized in net periodic benefit cost (income) and OCI	$ (229)	$ 2,348	$ (1,997)