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Comprehensive Income (Details 3) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Amortization of defined benefit pension items
Prior service cost	[1]			$ (84)
Actuarial losses	[1]			1,341
Total before tax				1,257
Tax benefit				(490)
Net of tax		$ 256	$ 272	$ 767	$ 815
[1] These amounts were included in the computation of net periodic pension cost. See Note 6 for additional details.

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