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Employee Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Pension Benefits
Components of the net periodic benefit cost
Interest cost	$ 29	$ 33	$ 87	$ 98
Recognized net actuarial loss	58	61	174	183
Benefit cost	87	94	261	281
Postretirement Benefits
Components of the net periodic benefit cost
Interest cost	214	188	641	565
Service cost	68	81	206	243
Amortization of prior service cost	(228)	(227)	(684)	(683)
Benefit cost	$ 54	$ 42	$ 163	$ 125

X

- Definition

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

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