Restructuring Activities (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2014
Restructuring and Related Activities [Abstract]
Restructuring charges	$ 1,274	$ 981	$ 2,810	$ 3,663	$ 8,728	$ 24,517
Restructuring liability	$ 968				$ 968	$ 4,859