Consolidated Statements of Operations (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Direct operating expenses	$ 25,860	$ 23,293	$ 76,073	$ 67,803
Non-cash stock-based compensation	1,300	800	3,518	1,763
Depreciation and amortization	3,613	4,013	11,388	12,436
Related Parties [Member]
Direct operating expenses	2,618	2,788	7,560	7,493
Depreciation and amortization	580	580	1,741	2,053
Direct Operating Expenses [Member]
Non-cash stock-based compensation	297	45	776	101
Depreciation and amortization	2,668	3,061	8,599	9,278
Selling, General and Administrative Expenses [Member]
Non-cash stock-based compensation	0	222	0	546
Depreciation and amortization	723	718	2,150	2,155
Corporate Expenses [Member]
Non-cash stock-based compensation	979	498	2,742	1,116
Depreciation and amortization	$ 222	$ 234	$ 639	$ 1,003