Goodwill (Schedule of Goodwill) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Goodwill [Roll Forward]
Goodwill, balance at the beginning of the period	$ 75,691	$ 32,073	$ 31,648
Translation adjustment	(3,181)	(2,217)	425
Goodwill acquired	2,999	45,835
Goodwill, balance at the end of the period	$ 75,509	$ 75,691	$ 32,073