Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Pension and Supplemental Executive Retirement Plans
Components of Net Periodic Benefit Cost [Abstract]
Company service cost	$ 0	$ 0
Interest cost	3,299	3,247
Expected return on plan assets	(3,442)	(3,644)
Net actuarial losses (gains)	546	523
Prior service cost (credit)	86	86
Cost of settlements and curtailments	0	0
Net periodic benefit cost (benefit)	489	212
Other Postretirement Benefit Plans
Components of Net Periodic Benefit Cost [Abstract]
Company service cost	234	417
Interest cost	311	375
Expected return on plan assets	(2,911)	(2,494)
Net actuarial losses (gains)	(692)	(380)
Prior service cost (credit)	118	453
Cost of settlements and curtailments	0	0
Net periodic benefit cost (benefit)	(2,940)	$ (1,629)
Pension Plan
Components of Net Periodic Benefit Cost [Abstract]
Company contribution to qualified pension plan	$ 7,500