Employee Retirement Plans (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Employee Retirement Plans
Service cost	$ 116	$ 111	$ 350	$ 334
Interest cost	658	438	1,974	1,315
Expected return on plan assets	(575)	(751)	(1,726)	(2,253)
Net amortization and deferral	124	219	372	657
Pension expense	$ 323	$ 17	$ 970	$ 53

No definition available.

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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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Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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The gain/loss and prior service cost amounts that were amortized and recognized as part of defined benefit pension cost during the year.

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