SUMMARIZED QUARTERLY FINANCIAL DATA - Unaudited (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	12 Months Ended
Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement Abstract
Income Tax Expense (Benefit)									$ 19,911us-gaap_IncomeTaxExpenseBenefit	$ 22,476us-gaap_IncomeTaxExpenseBenefit	$ 12,474us-gaap_IncomeTaxExpenseBenefit
Net income (loss)	10,850us-gaap_NetIncomeLoss	6,473us-gaap_NetIncomeLoss	8,137us-gaap_NetIncomeLoss	1,363us-gaap_NetIncomeLoss	9,507us-gaap_NetIncomeLoss	6,875us-gaap_NetIncomeLoss	9,893us-gaap_NetIncomeLoss	(251)us-gaap_NetIncomeLoss	26,823us-gaap_NetIncomeLoss	26,024us-gaap_NetIncomeLoss	11,268us-gaap_NetIncomeLoss
Earnings Per Share Abstract
Basic net income (loss) per common share	$ 0.29	$ 0.17	$ 0.22	$ 0.04	$ 0.25	$ 0.18	$ 0.26	$ (0.01)
Diluted net income (loss) per common share	$ 0.28	$ 0.17	$ 0.21	$ 0.04	$ 0.25	$ 0.18	$ 0.26	$ (0.01)
Quarterly Financial Information Disclosure Abstract
Sales Revenue, Net	101,513us-gaap_SalesRevenueNet	99,840us-gaap_SalesRevenueNet	100,201us-gaap_SalesRevenueNet	78,235us-gaap_SalesRevenueNet	99,583us-gaap_SalesRevenueNet	98,436us-gaap_SalesRevenueNet	101,239us-gaap_SalesRevenueNet	78,360us-gaap_SalesRevenueNet	379,789us-gaap_SalesRevenueNet	377,618us-gaap_SalesRevenueNet	388,924us-gaap_SalesRevenueNet
Operating Income Loss	28,531us-gaap_OperatingIncomeLoss	21,205us-gaap_OperatingIncomeLoss	23,916us-gaap_OperatingIncomeLoss	11,924us-gaap_OperatingIncomeLoss	29,241us-gaap_OperatingIncomeLoss	23,286us-gaap_OperatingIncomeLoss	28,268us-gaap_OperatingIncomeLoss	11,772us-gaap_OperatingIncomeLoss	85,576us-gaap_OperatingIncomeLoss	92,567us-gaap_OperatingIncomeLoss	76,594us-gaap_OperatingIncomeLoss
Net Income (Loss) Attributable to Parent	10,850us-gaap_NetIncomeLoss	6,473us-gaap_NetIncomeLoss	8,137us-gaap_NetIncomeLoss	1,363us-gaap_NetIncomeLoss	9,507us-gaap_NetIncomeLoss	6,875us-gaap_NetIncomeLoss	9,893us-gaap_NetIncomeLoss	(251)us-gaap_NetIncomeLoss	26,823us-gaap_NetIncomeLoss	26,024us-gaap_NetIncomeLoss	11,268us-gaap_NetIncomeLoss
Earnings Per Share Abstract
Basic net income (loss) per common share	$ 0.29	$ 0.17	$ 0.22	$ 0.04	$ 0.25	$ 0.18	$ 0.26	$ (0.01)
Diluted net income (loss) per common share	$ 0.28	$ 0.17	$ 0.21	$ 0.04	$ 0.25	$ 0.18	$ 0.26	$ (0.01)
Basic net income (loss) per common share	$ 0.29	$ 0.17	$ 0.22	$ 0.04	$ 0.25	$ 0.18	$ 0.26	$ (0.01)
Weighted average basic common shares outstanding	37,779,000	37,693,000	37,687,000	37,660,000	37,471,000	37,386,000	37,344,000	37,138,000	37,763,353	37,417,807	36,906,468
Diluted net income (loss) per common share	$ 0.28	$ 0.17	$ 0.21	$ 0.04	$ 0.25	$ 0.18	$ 0.26	$ (0.01)
Weighted Average Number Of Diluted Shares Outstanding	38,730,000	38,482,000	38,446,000	38,501,000	38,336,000	38,153,000	38,103,000	37,138,000	38,664,066	38,301,495	37,809,646
Radio Broadcasting Licences [Member]
Changes in broadcasting licenses [Line Items]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)									$ 0	$ 0

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Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.

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