Goodwill and Other Intangible Assets - Summary of other intangible assets (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Carrying amount:
Total carrying amount	$ 104,913	$ 105,773
Accumulated amortization:
Total accumulated amortization	(17,945)	(11,730)
Net amortizable intangible assets	86,968	94,043
Total other intangible assets	144,783	151,858
Licensing agreements
Accumulated amortization:
Other indefinite-lived intangible assets - FCC licenses	57,815	57,815
Television network affiliation relationships
Carrying amount:
Total carrying amount	78,844	78,844
Accumulated amortization:
Total accumulated amortization	(5,755)	(1,796)
Customer lists and advertiser relationships
Carrying amount:
Total carrying amount	22,304	23,164
Accumulated amortization:
Total accumulated amortization	(10,346)	(8,287)
Other
Carrying amount:
Total carrying amount	3,765	3,765
Accumulated amortization:
Total accumulated amortization	$ (1,844)	$ (1,647)