Summary of Significant Accounting Policies (Details 1)	12 Months Ended
	Dec. 31, 2012
Buildings and improvements [Member] | Maximum [Member]
Depreciation of property, plant and equipment, over the estimated useful lives of the assets
Estimated useful lives	30 years
Buildings and improvements [Member] | Minimum [Member]
Depreciation of property, plant and equipment, over the estimated useful lives of the assets
Estimated useful lives	5 years
Broadcast equipment [Member] | Maximum [Member]
Depreciation of property, plant and equipment, over the estimated useful lives of the assets
Estimated useful lives	15 years
Broadcast equipment [Member] | Minimum [Member]
Depreciation of property, plant and equipment, over the estimated useful lives of the assets
Estimated useful lives	5 years
Other [Member] | Maximum [Member]
Depreciation of property, plant and equipment, over the estimated useful lives of the assets
Estimated useful lives	10 years
Other [Member] | Minimum [Member]
Depreciation of property, plant and equipment, over the estimated useful lives of the assets
Estimated useful lives	3 years