Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Direct operating expenses	$ 110,323	$ 104,874	$ 101,419
Non-cash stock-based compensation	5,240	4,351	4,771
Depreciation and amortization	15,989	14,663	14,953
Related Parties
Direct operating expenses	9,306	10,655	10,322
Depreciation and amortization	2,321	2,320	2,320
Direct Operating Expenses
Non-cash stock-based compensation	1,931	1,294	1,070
Depreciation and amortization	10,326	10,037	11,176
Corporate Expenses
Non-cash stock-based compensation	3,309	3,057	3,701
Depreciation and amortization	1,444	779	854
Selling, General and Administrative Expenses
Depreciation and amortization	$ 4,219	$ 3,847	$ 2,923