Accounting Policies (Schedule of Foreign Currency Transaction Gains and Losses) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounting Policies [Abstract]
Selling, general, and administrative expense	$ (381)	$ (5,090)	$ (3,931)
Other (income)/expense, net	(3,532)	1,496	(6,379)
Total transaction (gains)/losses	(3,913)	(3,594)	(10,310)
Gain/(loss) on long-term intercompany loans	$ 3,515	$ (5,225)	$ 5,317