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Comprehensive (Loss) Income - Reclassification adjustments out of accumulated other comprehensive loss (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Amortization of defined benefit pension items
Prior service cost	$ (16)
Actuarial losses	202
Total before tax	186
Tax benefit	(48)
Net of tax	$ 138	$ 108

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