Restructuring (Restructuring and Related Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring expense	$ 389	$ 2,654	$ 354	$ 3,310
National Networks [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense	37	651	67	717
International And Other [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense	$ 352	$ 2,003	$ 287	$ 2,593