Restructuring (Restructuring and Related Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring expense	$ 19,312	$ 2,631	$ 19,666	$ 5,941
National Networks [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense	8,103	100	8,170	817
International And Other [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense	$ 11,209	$ 2,531	$ 11,496	$ 5,124