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Employee Benefit Plans (Components Of Other Comprehensive Loss Related To Defined Benefit Plan And Postretirement Benefit Plan) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Total recognized in accumulated other comprehensive loss	$ (19,990)	$ (20,509)
Deferred tax benefit	5,122	7,273
Amounts included in accumulated other comprehensive loss	(14,868)	(13,236)
Defined Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	(19,894)	(20,472)
Total recognized in accumulated other comprehensive loss	(19,894)	(20,472)
Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	(133)	(139)
Prior service credit (cost)	37	102
Total recognized in accumulated other comprehensive loss	$ (96)	$ (37)

X

- Definition

Amount, after tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

+ References

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Amount, before tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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- Definition

Amount, before tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.

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Amount, before tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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Amount, after reclassification adjustment, of tax (expense) benefit for (increase) decrease in accumulated other comprehensive income for defined benefit plan, attributable to parent.

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