Income Taxes (Schedule of Components of Deferred Income Tax Expense/(Benefit)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Taxes [Abstract]
Net effect of temporary differences	$ (7,615)	$ (1,667)	$ (334)
Foreign tax credits	(17,874)	(481)	2,378
Retirement benefits	1,844	1,438	1,482
Net impact to operating loss carryforwards	(5,722)	$ 6,120	(6,897)
Enacted changes in tax laws and rates	670		(282)
Adjustments to beginning-of-the-year valuation allowance balance for changes in circumstances	75	$ (109)	(3,741)
Deferred income tax provision	$ (28,622)	$ 5,301	$ (7,394)