Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Accounts receivable, allowance for doubtful accounts	$ 3,676	$ 3,599
Treasury stock, shares	4,947,659	4,947,659
Total assets of VIEs	61,124	60,380
Broadcast licenses and other intangible assets, net	45,343	46,604
Program rights	2,351	2,060
Total liabilities of VIEs	4,930	4,577
Program obligations	$ 3,128	$ 4,152
Class A common stock
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, issued shares	38,929,602	35,672,528
Common stock, outstanding shares	33,483,657	30,724,869
Class B common stock
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000
Common stock, issued shares	20,901,726	23,401,726
Common stock, outstanding shares	20,901,726	23,401,726
Class C common stock
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000
Common stock, issued shares	2	2
Common stock, outstanding shares	2	2