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Employee Retirement Plans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Service cost	$ 116	$ 126	$ 347	$ 427
Interest cost	615	554	1,845	1,652
Expected return on plan assets	(625)	(741)	(1,876)	(2,033)
Net amortization and deferral	156	157	469	476
Net periodic pension cost	$ 262	$ 96	$ 785	$ 522

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.

+ Details

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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.

+ References

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- Definition

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

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- Definition

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

+ References

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- Definition

Amount of cost (reversal of cost) for pension benefits. Excludes other postretirement benefits.

+ References

No definition available.

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- Definition

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

+ References

No definition available.

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