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Comprehensive Income (Loss) (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Amortization of defined benefit pension items
Prior service cost	$ (63)	$ (63)	[1]
Actuarial losses	697	589	[1]
Total before tax	634	526
Tax benefit	(165)	(137)
Net of tax	$ 469	$ 389
[1] These amounts were included in the computation of net periodic pension cost. See Note 11 for additional details.

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