Pension and Supplemental Executive Retirement Plans - Defined Benefit Plan Activity (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2024	Mar. 31, 2023
Components of net periodic pension cost
Interest cost	$ 113	$ 113
Expected return on plan assets	(157)	(164)
Amortization of net actuarial loss	43	29
Net periodic benefit (income) cost	(1)	(22)
Contributions paid	$ 0	$ 0

Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.

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Amount of contribution received by defined benefit plan from employer which increases plan assets.

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Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan.

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Amount of cost recognized for passage of time related to defined benefit plan.

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Amount of net periodic benefit cost (credit) for defined benefit plan.

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