Employee Retirement Plans (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Employee Retirement Plans
Service cost	$ 116	$ 111	$ 234	$ 223
Interest cost	644	445	1,316	877
Expected return on plan assets	(574)	(750)	(1,151)	(1,502)
Net amortization and deferral	114	230	248	438
Pension expense	$ 300	$ 36	$ 647	$ 36

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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