Segment Information - Separate Financial Data for Each of Company's Operating Segment (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2011	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Segment Reporting Information [Line Items]
Net revenue	$ 62,274	$ 57,786		$ 176,776	$ 163,823
Cost of revenue	1,489			1,489
Direct operating expenses	26,913	25,860		78,542	76,073
Selling, general and administrative expenses	9,031	8,131		25,910	23,238
Depreciation and amortization	3,785	3,613		10,803	11,388
Segment operating profit	21,056	20,182		60,032	53,124
Corporate expenses	4,899	5,011		14,996	14,244
Operating income (loss)	16,157	15,171		45,036	38,880
Interest expense	(3,501)	(5,352)		(10,408)	(21,017)
Interest income	12	12		37	28
Gain (loss) on debt extinguishment		(29,404)	400		(29,534)
Income (loss) before income taxes	12,668	(19,573)		34,665	(11,643)
Capital expenditures	2,395	3,396		6,724	7,638
Total assets	550,411			550,411		538,237
Percentage change in net revenue	8.00%			8.00%
Percentage change in direct operating expenses	4.00%			3.00%
Percentage change in selling, general and administrative expenses	11.00%			11.00%
Percentage change in depreciation and amortization	5.00%			(5.00%)
Percentage change in segment operating profit	4.00%			13.00%
Percentage change in Corporate expenses	(2.00%)			5.00%
Percentage change in operating income (loss)	6.00%			16.00%
Percentage change in interest expenses	(35.00%)			(50.00%)
Percentage change in interest income	0.00%			32.00%
Percentage change in gain (loss) on debt extinguishment	(100.00%)			(100.00%)
Television
Segment Reporting Information [Line Items]
Net revenue	41,301	39,747		122,193	114,289
Direct operating expenses	15,777	15,905		46,885	46,884
Selling, general and administrative expenses	4,346	4,127		12,875	11,635
Depreciation and amortization	2,621	2,918		8,007	9,249
Segment operating profit	18,557	16,797		54,426	46,521
Capital expenditures	1,351	2,298		3,925	5,853
Total assets	400,481			400,481		412,487
Percentage change in net revenue	4.00%			7.00%
Percentage change in direct operating expenses	(1.00%)			0.00%
Percentage change in selling, general and administrative expenses	5.00%			11.00%
Percentage change in depreciation and amortization	(10.00%)			(13.00%)
Percentage change in segment operating profit	10.00%			17.00%
Radio
Segment Reporting Information [Line Items]
Net revenue	18,081	18,039		51,691	49,534
Direct operating expenses	10,131	9,955		30,652	29,189
Selling, general and administrative expenses	4,150	4,004		12,500	11,603
Depreciation and amortization	868	695		2,500	2,139
Segment operating profit	2,932	3,385		6,039	6,603
Capital expenditures	1,029	1,098		2,779	1,785
Total assets	126,981			126,981		125,750
Percentage change in net revenue	0.00%			4.00%
Percentage change in direct operating expenses	2.00%			5.00%
Percentage change in selling, general and administrative expenses	4.00%			8.00%
Percentage change in depreciation and amortization	25.00%			17.00%
Percentage change in segment operating profit	(13.00%)			(9.00%)
Digital
Segment Reporting Information [Line Items]
Net revenue	2,892			2,892
Cost of revenue	1,489			1,489
Direct operating expenses	1,005			1,005
Selling, general and administrative expenses	535			535
Depreciation and amortization	296			296
Segment operating profit	(433)			(433)
Capital expenditures	15			20
Total assets	$ 22,949			$ 22,949
Percentage change in net revenue	100.00%			100.00%
Percentage change in Cost of revenue	100.00%			100.00%
Percentage change in direct operating expenses	100.00%			100.00%
Percentage change in selling, general and administrative expenses	100.00%			100.00%
Percentage change in depreciation and amortization	100.00%			100.00%
Percentage change in segment operating profit	100.00%			100.00%