Goodwill and Other Intangible Assets - Carrying Amount of Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Goodwill [Line Items]
Goodwill	$ 50,081us-gaap_Goodwill	$ 36,647us-gaap_Goodwill
Acquisition	14,169us-gaap_GoodwillAcquiredDuringPeriod
Impairment	(735)us-gaap_GoodwillImpairmentLoss
Television
Goodwill [Line Items]
Goodwill	35,912	35,912
Impairment	0	0
Radio
Goodwill [Line Items]
Goodwill		735
Impairment	(735)	0
Digital
Goodwill [Line Items]
Goodwill	14,169
Acquisition	$ 14,169

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

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-Publisher FASB

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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