Broadcast Licenses, Goodwill and Other Intangible Assets (Details) (USD $) In Thousands, 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
Indefinite-lived Intangible Assets [Line Items]
Balance				$ 88,460				$ 90,361	$ 88,460	$ 90,361
Acquisitions									238	132
Impairment charge	1,936	0	0	0	2,033	0	0	0	1,936	2,033	0
Balance	86,762				88,460				86,762	88,460	90,361
Radio [Member]
Indefinite-lived Intangible Assets [Line Items]
Balance				78,872				80,773	78,872	80,773
Acquisitions									219	132
Impairment charge									(1,936)	(2,033)
Balance	77,155				78,872				77,155	78,872
Television [Member]
Indefinite-lived Intangible Assets [Line Items]
Balance				9,588				9,588	9,588	9,588
Acquisitions									19	0
Impairment charge									0	0
Balance	$ 9,607				$ 9,588				$ 9,607	$ 9,588