Restructuring Restructuring (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Restructuring expense	$ 45,847	$ 6,128	$ 29,503
Restructuring Reserve, Current	29,100
Restructuring Reserve, Noncurrent	6,100
Employee Severance [Member]
Restructuring expense	35,965	2,543
Other Restructuring [Member]
Restructuring expense	9,882	3,585
International And Other [Member]
Restructuring expense	35,189	$ 6,181	$ 20,987
International And Other [Member] | Employee Severance [Member]
Restructuring expense	$ 9,400