Retirement Plans, Schedule of Change in Benefit Obligation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Pension Plan [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	$ 342,749	$ 339,509
Service cost	3,395	3,695	$ 6,538
Interest cost	17,179	18,356	14,779
Actuarial (gain) loss	(26,541)	13,241
Gross benefits paid	(15,572)	(32,052)
Benefit obligation at end of year	321,210	342,749	339,509
Accumulated benefit obligation at end of year	310,714	326,987
SERP [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	814	833
Service cost	0	0	0
Interest cost	39	43	29
Actuarial (gain) loss	(33)	91
Gross benefits paid	(68)	(153)
Benefit obligation at end of year	752	814	833
Accumulated benefit obligation at end of year	752	814
Other Postretirement Benefits [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	415	432
Service cost	0	0
Interest cost	20	22	17
Actuarial (gain) loss	(3)	65
Gross benefits paid	(36)	(104)
Benefit obligation at end of year	396	415	$ 432
Accumulated benefit obligation at end of year	$ 396	$ 415