Quarterly report pursuant to Section 13 or 15(d)

Property And Equipment (Schedule Of Property And Equipment) (Details)

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Property And Equipment (Schedule Of Property And Equipment) (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Mar. 31, 2016
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Gross $ 628,331 $ 620,359 $ 601,575
Less: accumulated depreciation and amortization (417,949) (409,253) (395,231)
Total property and equipment, net 210,382 211,106 206,344
Capitalized software      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Gross 256,717 252,741 237,202
Computer and broadcast equipment      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Gross 89,708 91,119 93,557
Buildings and leasehold improvements      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Gross 118,016 113,731 110,887
Furniture and other equipment      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Gross 125,940 124,518 97,434
Projects in progress      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Gross 27,366 27,666 51,860
Land and land improvements      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Gross $ 10,584 $ 10,584 $ 10,635