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Employee Retirement Plans (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Components of the Company's net periodic pension cost
Service cost	$ 115	$ 128	$ 230	$ 231
Interest cost	506	624	1,006	1,230
Expected return on plan assets	(698)	(625)	(1,388)	(1,251)
Net amortization and deferral	196	167	382	313
Net periodic pension cost	$ 119	$ 294	$ 230	$ 523

X

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

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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- Definition

Amount of cost recognized for passage of time related to 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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Amount of cost (reversal of cost) for pension benefits. Excludes other postretirement benefits.

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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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