Interim Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net Income	$ 8,659	$ 7,359
Other comprehensive income (loss) (before tax effect):
Foreign currency translation adjustment	3,559	(13,652)
Post Retirement adjustments:
Net gains arising during the period	166	205
Other comprehensive income (loss)	3,725	(13,447)
Comprehensive Income (Loss)	$ 12,384	$ (6,088)