Quarterly report pursuant to Section 13 or 15(d)

Business Acquisitions and Asset Purchases (Detail)

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Business Acquisitions and Asset Purchases (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Feb. 15, 2013
WTOH-FM, Columbus, Ohio
Feb. 05, 2013
WGTK-FM, Greenville, South Carolina
Business Acquisition [Line Items]      
Business acquisition, total cost $ 9,427 $ 4,000 $ 5,427