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Accumulated Other Comprehensive Loss (Schedule of Changes in Accumulated Other Comprehensive Income (Loss)) (Details) - Reclassification out of Accumulated Other Comprehensive Income [Member] - Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member] - Pension Benefits [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Pre-Tax	$ 156	$ 140
After-Tax	$ 156	$ 140

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No definition available.

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Amount before tax of reclassification adjustments of other comprehensive income (loss).

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