Employee Benefits (Tables)

12 Months Ended

Dec. 31, 2023

Retirement Benefits [Abstract]

Schedule of Reconciliation of Changes in Benefit Obligation and Fair value of Plan Assets As Well As the Funded Status Recognized in the Consolidated Statements

The following table provides a reconciliation of changes in benefit obligation and fair value of plan assets, as well as the funded status recognized in the Company’s consolidated statements of condition for the Pension Plans and postretirement benefit plan for the years ended December 31, 2023, and December 31, 2022.

	Pension Benefits						Postretirement Benefits
(dollars in thousands)	2023			2022			2023			2022
Benefit Obligation at Beginning of Year	$	84,454		$	110,585		$	21,929		$	29,270
Service Cost		—			—			376			584
Interest Cost		4,468			3,097			1,186			861
Purchase		(4,115	)		—			—			—
Actuarial Losses (Gains)		1,070			(22,049	)		1,496			(7,577	)
Employer Benefits Paid 1		(7,309	)		(7,179	)		(1,673	)		(1,209	)
Benefit Obligation at End of Year	$	78,568		$	84,454		$	23,314		$	21,929
Fair Value of Plan Assets at Beginning of Year	$	79,324		$	101,294		$	—		$	—
Actual Return on Plan Assets		9,846			(15,261	)		—			—
Employer Contributions		468			470			1,673			1,209
Purchase		(4,115	)		—			—			—
Employer Benefits Paid 1		(7,309	)		(7,179	)		(1,673	)		(1,209	)
Fair Value of Plan Assets at End of Year	$	78,214		$	79,324		$	—		$	—
Funded Status at End of Year 2	$	(354	)	$	(5,130	)	$	(23,314	)	$	(21,929	)

1.Participants' contributions relative to the postretirement benefit plan were offset against employer benefits paid in the table above. Participants' contributions for postretirement benefits were $0.8 million for the years ended December 31, 2023, and December 31, 2022.

2.Amounts are recognized in Retirement Benefits Payable in the consolidated statements of condition.

Schedule of Amounts Recognized in Accumulated Other Comprehensive Income (Loss)

The following presents the amounts recognized in the Company’s accumulated other comprehensive income for the Pension Plans and postretirement benefit plan as of December 31, 2023, and December 31, 2022.

	Pension Benefits						Postretirement Benefits
(dollars in thousands)	2023			2022			2023		2022
Amounts Recognized in Accumulated Other    Comprehensive Income (Loss), Net of Tax
Net Actuarial Gains (Losses)	$	(28,512	)	$	(31,984	)	$	4,330	$	5,803
Net Prior Service Credit		—			—			922		1,103
Total Amounts Recognized in Accumulated Other    Comprehensive Income (Loss), Net of Tax	$	(28,512	)	$	(31,984	)	$	5,252	$	6,906

Schedule of Components of Net Periodic Benefit Cost

Components of net periodic benefit cost for the Company’s Pension Plans and the postretirement benefit plan are presented in the following table for the years ended December 31, 2023, December 31, 2022, and December 31, 2021.

	Pension Benefits									Postretirement Benefits
(dollars in thousands)	2023			2022			2021			2023			2022			2021
Service Cost	$	—		$	—		$	—		$	376		$	584		$	678
Interest Cost		4,468			3,097			2,924			1,186			861			816
Expected Return on Plan Assets		(5,238	)		(4,840	)		(4,592	)		—			—			—
Amortization of:
Prior Service Credit 1		—			—			—			(246	)		(246	)		(246	)
Net Actuarial Losses (Gains) 1		1,258			2,175			2,676			(507	)		—			—
Net Periodic Benefit Cost	$	488		$	432		$	1,008		$	809		$	1,199		$	1,248

1Represents reclassification adjustments from accumulated other comprehensive income during the period.

Schedule of Assumptions Used to Determine the Benefit Obligations/net Periodic Cost

Assumptions used to determine the benefit obligations as of December 31, 2023, and December 31, 2022, for the Company’s Pension Plans and postretirement benefit plan were as follows:

	Pension Benefits						Postretirement Benefits
	2023			2022			2023			2022
Weighted Average Assumptions as of December 31:
Discount Rate		5.44	%		5.51	%		5.51	%		5.58	%
Health Care Cost Trend Rate Assumed For Next Year		—			—			6.90	%		6.20	%

Schedule of Assumptions Used in Calculation Net Periodic Benefit Cost

Assumptions used to determine the net periodic benefit cost for the Company’s Pension Plans and postretirement benefit plan for the years ended December 31, 2023, December 31, 2022, and December 31, 2021, were as follows:

	Pension Benefits									Postretirement Benefits
	2023			2022			2021			2023			2022			2021
Weighted Average Assumptions as of December 31:
Discount Rate		5.51	%		2.89	%		2.55	%		5.58	%		3.00	%		2.66	%
Expected Long-Term Rate of Return on Plan Assets		6.00	%		5.25	%		5.25	%		—			—			—
Health Care Cost Trend Rate		—			—			—			6.20	%		5.70	%		5.50	%

Schedule of Expected Benefits to be Paid in Each of the Next Five Years and in the Aggregate for the Five Years Thereafter

As of December 31, 2023, expected benefits to be paid in each of the next five years and in the aggregate for the five years thereafter were as follows:

(dollars in thousands)	Pension Benefits		Postretirement Benefits
2024	$	7,191	$	1,541
2025		7,126		1,590
2026		7,035		1,611
2027		6,931		1,674
2028		6,788		1,704
Years 2029-2033		31,445		9,070

Schedule of the Fair Values of the Retirement Plan Assets by Asset Category

The fair values of the Retirement Plan assets as of December 31, 2023, and December 31, 2022, by asset category were as follows:

	Fair Value Measurements
Asset Category (dollars in thousands)	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Other Unobservable Inputs (Level 3)		Total as of Dec. 31, 2023		Total as of Dec. 31, 20221
Cash	$	6,214	$	—	$	—	$	6,214	$	589
Equity Securities – Mutual Funds:
Large-Cap		—		—		—		—		4,979
Mixed-Cap		—		—		—		—		23,632
International		—		—		—		—		18,283
Emerging Market		—		—		—		—		757
Fixed Income Securities – Mutual Funds		—		—		—		—		31,084
Total	$	6,214	$	—	$	—	$	6,214	$	79,324
Collective Investment Funds (measured at NAV of units as a practical expedient)								72,000		—
Total Investments at Fair Value							$	78,214	$	79,324

The fair values of assets held as of December 31, 2022 were measured using Level 1 inputs.