Consolidated Statements of Operations (Parenthetical) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Direct operating expenses	$ 29,915	$ 28,538	$ 57,007	$ 56,103
Non-cash stock-based compensation			2,060	1,890
Depreciation and amortization	4,577	3,885	8,123	7,912
Related Parties
Direct operating expenses	2,392	2,536	4,712	4,847
Depreciation and amortization	580	580	1,161	1,160
Direct Operating Expenses
Non-cash stock-based compensation	307	300	530	621
Depreciation and amortization	2,398	2,294	4,604	4,749
Corporate Expenses
Non-cash stock-based compensation	778	644	1,530	1,269
Depreciation and amortization	329	361	654	734
Selling, General and Administrative Expenses
Depreciation and amortization	$ 1,849	$ 1,230	$ 2,865	$ 2,429