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Employee Benefit Plans (Components of Net Periodic Benefit Cost) (Details) - Pension Benefits [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Interest cost	$ 236	$ 358	$ 708	$ 1,074
Expected return on plan assets	(584)	(609)	(1,752)	(1,828)
Amortization of unrecognized net (gain) loss	156	140	467	421
Total net periodic benefit cost	$ (192)	$ (111)	$ (577)	$ (333)

X

- Definition

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

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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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