Segment Information - Separate Financial Data for Each of Company's Operating Segment (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Segment Reporting Information [Line Items]
Net revenue	$ 52,656	$ 49,087
Direct operating expenses	24,876	24,225
Selling, general and administrative expenses	8,631	7,683
Depreciation and amortization	3,515	3,955
Segment operating profit (loss)	15,634	13,224
Corporate expenses	4,836	4,497
Operating income (loss)	10,798	8,727
Interest expense	(3,438)	(7,784)
Interest income	12	7
Income (loss) before income taxes	7,372	950
Capital expenditures	1,834	1,928
Total assets	534,777		538,237
Percentage change in net revenue		7.00%
Percentage change in direct operating expenses		3.00%
Percentage change in selling, general and administrative expenses		12.00%
Percentage change in depreciation and amortization		(11.00%)
Percentage change in segment operating profit (loss)		18.00%
Percentage change in Corporate expenses		8.00%
Percentage change in operating income (loss)		24.00%
Percentage change in interest expenses		(56.00%)
Percentage change in interest income		71.00%
Percentage change in income (loss) before income taxes		676.00%
Television
Segment Reporting Information [Line Items]
Net revenue	37,741	34,952
Direct operating expenses	14,956	14,988
Selling, general and administrative expenses	4,495	3,926
Depreciation and amortization	2,715	3,217
Segment operating profit (loss)	15,575	12,821
Capital expenditures	911	1,786
Total assets	410,786		412,487
Percentage change in net revenue		8.00%
Percentage change in direct operating expenses		0.00%
Percentage change in selling, general and administrative expenses		14.00%
Percentage change in depreciation and amortization		(16.00%)
Percentage change in segment operating profit (loss)		21.00%
Radio
Segment Reporting Information [Line Items]
Net revenue	14,915	14,135
Direct operating expenses	9,920	9,237
Selling, general and administrative expenses	4,136	3,757
Depreciation and amortization	800	738
Segment operating profit (loss)	59	403
Capital expenditures	923	142
Total assets	$ 123,991		$ 125,750
Percentage change in net revenue		6.00%
Percentage change in direct operating expenses		7.00%
Percentage change in selling, general and administrative expenses		10.00%
Percentage change in depreciation and amortization		8.00%
Percentage change in segment operating profit (loss)		(85.00%)

Capital expenditures.

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Corporate expenses.

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Percentage change in corporate expenses.

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Percentage change in depreciation and amortization.

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Percentage change in direct operating costs.

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Percentage change in income loss before income taxes.

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Percentage change in interest expense.

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Percentage change in interest income.

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Percentage change in net revenue.

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Percentage change in operating income (loss).

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Percentage change in segment operating profit.

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Percentage change in selling, general and administrative expenses.

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Segment operating profit.

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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The aggregate direct operating costs incurred during the reporting period.

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Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest.

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Amount of the cost of borrowed funds accounted for as interest expense.

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The net result for the period of deducting operating expenses from operating revenues.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.

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