Segment Information - Separate Financial Data for Each of Company's Operating Segment (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2011	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Segment Reporting Information [Line Items]
Net revenue	$ 61,846	$ 56,950		$ 114,502	$ 106,037
Direct operating expenses	26,753	25,988		51,629	50,213
Selling, general and administrative expenses	8,248	7,424		16,879	15,107
Depreciation and amortization	3,503	3,820		7,018	7,775
Segment operating profit	23,342	19,718		38,976	32,942
Corporate expenses	5,261	4,736		10,097	9,233
Operating income (loss)	18,081	14,982		28,879	23,709
Interest expense	(3,469)	(7,881)		(6,907)	(15,665)
Interest income	13	9		25	16
Gain (loss) on debt extinguishment		(130)	400		(130)
Income (loss) before income taxes	14,625	6,980		21,997	7,930
Capital expenditures	2,493	2,313		4,329	4,241
Total assets	546,952			546,952		538,237
Percentage change in net revenue	9.00%			8.00%
Percentage change in direct operating expenses	3.00%			3.00%
Percentage change in selling, general and administrative expenses	11.00%			12.00%
Percentage change in depreciation and amortization	(8.00%)			(10.00%)
Percentage change in segment operating profit	18.00%			18.00%
Percentage change in Corporate expenses	11.00%			9.00%
Percentage change in operating income (loss)	21.00%			22.00%
Percentage change in interest expenses	(56.00%)			(56.00%)
Percentage change in interest income	44.00%			56.00%
Percentage change in gain (loss) on debt extinguishment	(100.00%)			(100.00%)
Percentage change in income (loss) before income taxes	110.00%			177.00%
Television
Segment Reporting Information [Line Items]
Net revenue	43,151	39,590		80,892	74,542
Direct operating expenses	16,152	15,991		31,108	30,979
Selling, general and administrative expenses	4,034	3,582		8,529	7,508
Depreciation and amortization	2,671	3,114		5,386	6,331
Segment operating profit	20,294	16,903		35,869	29,724
Capital expenditures	1,662	1,769		2,574	3,555
Total assets	400,395			400,395		412,487
Percentage change in net revenue	9.00%			9.00%
Percentage change in direct operating expenses	1.00%			0.00%
Percentage change in selling, general and administrative expenses	13.00%			14.00%
Percentage change in depreciation and amortization	(14.00%)			(15.00%)
Percentage change in segment operating profit	20.00%			21.00%
Radio
Segment Reporting Information [Line Items]
Net revenue	18,695	17,360		33,610	31,495
Direct operating expenses	10,601	9,997		20,521	19,234
Selling, general and administrative expenses	4,214	3,842		8,350	7,599
Depreciation and amortization	832	706		1,632	1,444
Segment operating profit	3,048	2,815		3,107	3,218
Capital expenditures	831	544		1,755	686
Total assets	$ 146,557			$ 146,557		$ 125,750
Percentage change in net revenue	8.00%			7.00%
Percentage change in direct operating expenses	6.00%			7.00%
Percentage change in selling, general and administrative expenses	10.00%			10.00%
Percentage change in depreciation and amortization	18.00%			13.00%
Percentage change in segment operating profit	8.00%			(3.00%)