Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Net Revenue	$ 74,329	$ 70,509	$ 141,167	$ 128,019
Expenses:
Cost of revenue - digital	11,384	8,762	22,009	10,514
Direct operating expenses (including related parties of $2,208, $2,392, $4,256 and $4,712) (including non-cash stock-based compensation of $76, $307, $293 and $530)	31,117	29,915	62,150	57,007
Selling, general and administrative expenses	12,673	12,030	25,967	23,230
Corporate expenses (including non-cash stock-based compensation of $1,100, $778, $2,133 and $1,530)	6,266	5,619	12,241	11,486
Depreciation and amortization (includes direct operating of $2,560, $2,398, $5,097 and $4,604; selling, general and administrative of $1,301, $1,849, $2,614 and $2,865; and corporate of $153, $329, $242 and $654) (including related parties of $307, $580, $614 and $1,161)	4,019	4,577	7,958	8,123
Change in fair value of contingent consideration	(913)		1,187
Foreign currency (gain) loss	(17)	351	196	351
Total expenses	64,529	61,254	131,708	110,711
Operating income (loss)	9,800	9,255	9,459	17,308
Interest expense	(4,001)	(3,683)	(7,399)	(7,328)
Interest income	1,039	110	1,952	219
Dividend income	417		545
Other income (loss)	273		295
Income (loss) before income taxes	7,528	5,682	4,852	10,199
Income tax benefit (expense)	(2,652)	(2,119)	(1,721)	(4,018)
Income (loss) before equity in net income (loss) of nonconsolidated affiliate	4,876	3,563	3,131	6,181
Equity in net income (loss) of nonconsolidated affiliate, net of tax	(36)	(68)	(98)	(68)
Net income (loss)	$ 4,840	$ 3,495	$ 3,033	$ 6,113
Basic and diluted earnings per share:
Net income (loss) per share, basic and diluted	$ 0.05	$ 0.04	$ 0.03	$ 0.07
Cash dividends declared per common share	$ 0.05	$ 0.03	$ 0.05	$ 0.06
Weighted average common shares outstanding, basic	88,959,935	90,354,982	89,635,759	90,296,057
Weighted average common shares outstanding, diluted	90,021,949	92,033,111	90,805,086	91,897,150