SUMMARIZED QUARTERLY FINANCIAL DATA - Unaudited (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement Abstract
Income Tax Expense (Benefit)									$ 14,794	$ 18,437	$ 19,911
Net income (loss)	$ 11,399	$ 11,420	$ 10,834	$ 4,412	$ 14,088	$ 8,442	$ 6,747	$ (93)	38,065	29,184	26,823	$ 26,823
Earnings Per Share Abstract
Basic net income (loss) per common share	$ 0.28	$ 0.28	$ 0.27	$ 0.1	$ 0.36	$ 0.21	$ 0.18	$ 0
Diluted net income (loss) per common share	$ 0.27	$ 0.28	$ 0.26	$ 0.1	$ 0.34	$ 0.21	$ 0.17	$ 0
Quarterly Financial Information Disclosure Abstract
Sales Revenue, Net	$ 123,207	$ 120,457	$ 120,478	$ 96,103	$ 117,704	$ 114,662	$ 100,592	$ 78,420	460,245	411,378	379,789
Operating Income Loss	30,040	25,688	27,584	14,745	32,555	23,159	20,615	9,253	98,057	85,582	85,576
Net Income (Loss) Attributable to Parent	$ 11,399	$ 11,420	$ 10,834	$ 4,412	$ 14,088	$ 8,442	$ 6,747	$ (93)	$ 38,065	$ 29,184	$ 26,823	$ 26,823
Basic net income (loss) per common share	$ 0.28	$ 0.28	$ 0.27	$ 0.1	$ 0.36	$ 0.21	$ 0.18	$ 0
Weighted average basic common shares outstanding	38,561,000	38,485,000	38,469,000	38,448,000	38,088,000	38,076,000	38,074,000	38,026,000	38,500,495	38,083,947	37,763,353
Diluted net income (loss) per common share	$ 0.27	$ 0.28	$ 0.26	$ 0.1	$ 0.34	$ 0.21	$ 0.17	$ 0
Weighted Average Number Of Diluted Shares Outstanding	39,800,000	41,433,000	41,130,000	39,260,000	40,974,000	38,913,000	38,929,000	38,026,000	39,568,062	39,037,623	38,664,066
Changes in broadcasting licenses [Line Items]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)									$ 0	$ 0
Preferred stock dividend	$ 550	$ 413	$ 413	$ 412	$ 413	$ 0	$ 0	$ 0	1,901	752	$ 0
Net Income (Loss) Available to Common Stockholders, Basic	10,849	10,894	10,422	3,999	13,675	8,103	6,747	(93)	36,164	$ 28,432	$ 26,823
Payments Of Dividends	$ 2,893	$ 2,887	$ 2,886	$ 0	$ 0	$ 0	$ 0	$ 0	$ (8,666)