Other Income and Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Other Income and Expenses [Abstract]
Interest income	$ (334)	$ (523)	$ (1,033)	$ (2,196)
Foreign currency (gain) loss, net	7,124	(8,499)	11,506	(9,751)
Loss on debt retirement	0	0	0	(9,560)
Other (income) expense, net	(133)	(2,554)	(866)	(2,397)
Total other (income) expense, net	$ 6,657	$ (11,576)	$ 9,607	$ (4,784)