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Segment Information (Summary Of Inter-Segment Eliminations) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Segment Reporting Information [Line Items] |  |  |  |
Revenues, net | $ 601,138 | $ 522,093 | $ 1,269,820 | $ 1,046,647
Intersegment Eliminations [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues, net | (353) | (511) | (874) | (1,215)
Intersegment Eliminations [Member] | National Networks [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues, net | (336) | (316) | (788) | (990)
Intersegment Eliminations [Member] | International And Other [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues, net | $ (17) | $ (195) | $ (86) | $ (225)

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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