Annual report pursuant to Section 13 and 15(d)

Summary Of Significant Accounting Policies (Depreciation Period Of Property Plant And Equipment) (Details)

v3.6.0.2
Summary Of Significant Accounting Policies (Depreciation Period Of Property Plant And Equipment) (Details)
 12 Months Ended
Dec. 31, 2016
Minimum [Member] | Computer and broadcast equipment and capitalized software  
Property, Plant and Equipment [Line Items]  
Estimated useful life 3 years
Minimum [Member] | Buildings, leasehold improvements and land improvements  
Property, Plant and Equipment [Line Items]  
Estimated useful life 3 years
Minimum [Member] | Furniture and other equipment  
Property, Plant and Equipment [Line Items]  
Estimated useful life 2 years
Maximum [Member] | Computer and broadcast equipment and capitalized software  
Property, Plant and Equipment [Line Items]  
Estimated useful life 20 years
Maximum [Member] | Buildings, leasehold improvements and land improvements  
Property, Plant and Equipment [Line Items]  
Estimated useful life 40 years
Maximum [Member] | Furniture and other equipment  
Property, Plant and Equipment [Line Items]  
Estimated useful life 30 years