Retirement Plans, Components of Net Periodic Benefit Cost, Pension Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Components of net periodic benefit cost [Abstract]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax
Other changes in plan assets and benefit obligations recognized in other comprehensive income [Abstract]
Recognition of actuarial (gain) loss	$ 51,149	$ 22,438	$ 58,147
Pension Plan [Member]
Components of net periodic benefit cost [Abstract]
Service cost	3,395	3,695	6,538
Interest cost	17,179	18,356	14,779
Expected return on plan assets	(24,885)	(22,910)	(28,399)
Amortization of actuarial (gain) loss	(2,330)	0	34
Net periodic benefit cost	(6,641)	(859)	(7,048)
Other changes in plan assets and benefit obligations recognized in other comprehensive income [Abstract]
Current year actuarial (gain) loss	(51,114)	(22,583)	(58,015)
Recognition of actuarial (gain) loss	2,330	0	(34)
Total recognized in other comprehensive income	(48,784)	(22,583)	(58,049)
Total recognized in net periodic benefit cost and other comprehensive income	(55,425)	(23,442)	(65,097)
SERP [Member]
Components of net periodic benefit cost [Abstract]
Service cost	0	0	0
Interest cost	39	43	29
Expected return on plan assets	0	0	0
Amortization of actuarial (gain) loss	32	23	30
Net periodic benefit cost	71	66	59
Other changes in plan assets and benefit obligations recognized in other comprehensive income [Abstract]
Current year actuarial (gain) loss	(32)	91	(74)
Recognition of actuarial (gain) loss	(32)	(23)	(30)
Total recognized in other comprehensive income	(64)	68	(104)
Total recognized in net periodic benefit cost and other comprehensive income	$ 7	$ 134	$ (45)