Retirement Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2024

Retirement Benefits [Abstract]

Schedule of Defined Benefit Plans Disclosures

The following tables provide the components of net periodic benefit costs for the three-month and six-month periods ended June 30, 2024 and 2023:

	Employees'		Select Executive		Postretirement
	Pension		Retirement		Benefit
	Plan		Plan		Plans
Net Periodic Benefit Cost
For the Three Months Ended June 30, 2024:
Service Cost 1	$	380	$	22	$	8
Interest Cost 2	595		2		79
Expected Return on Plan Assets 2	(923)		—		—
Amortization of Prior Service Cost 2	33		10		25
Amortization of Net Gain 2	—		(9)		(82)
Net Periodic Cost	$	85	$	25	$	30
Plan Contributions During the Period	$	—	$	128	$	54
For the Three Months Ended June 30, 2023:
Service Cost 1	$	384	$	122	$	10
Interest Cost 2	519		97		80
Expected Return on Plan Assets 2	(851)		—		—
Amortization of Prior Service Cost 2	15		10		26
Amortization of Net Loss (Gain) 2	23		19		(98)
Net Periodic Cost	$	90	$	248	$	18
Plan Contributions During the Period	$	—	$	110	$	20
Net Periodic Benefit Cost
For the Six Months Ended June 30, 2024:
Service Cost 1	$	846	$	39	$	23
Interest Cost 2	1,120		160		160
Expected Return on Plan Assets 2	(1,855)		—		—
Amortization of Prior Service Cost 2	66		20		51
Amortization of Net Loss (Gain) 2	—		12		(169)
Net Periodic Cost	$	177	$	231	$	65
Plan Contributions During the Period	$	—	$	255	$	81
Estimated Future Contributions in the Current Fiscal Year	$	—	$	255	$	81
For the Six Months Ended June 30, 2023:
Service Cost 1	$	797	$	285	$	28
Interest Cost 2	1,049		159		167
Expected Return on Plan Assets 2	(1,708)		—		—
Amortization of Prior Service Cost 2	31		20		52
Amortization of Net Loss (Gain) 2	59		37		(177)
Net Periodic Cost	$	228	$	501	$	70
Plan Contributions During the Period	$	—	$	226	$	47

Footnotes:

1. Included in Salaries and Employee Benefits on the Consolidated Statements of Income

2. Included in Other Operating Expense on the Consolidated Statements of Income