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Broadcast Licenses, Goodwill and Other Intangible Assets (Details 1) | 3 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Minimum [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Discount rates | 12.30%us-gaap_FairValueInputsDiscountRate / us-gaap_RangeAxis = us-gaap_MinimumMember | 12.20%us-gaap_FairValueInputsDiscountRate / us-gaap_RangeAxis = us-gaap_MinimumMember | 12.00%us-gaap_FairValueInputsDiscountRate / us-gaap_RangeAxis = us-gaap_MinimumMember
Operating profit margin ranges | 20.80%us-gaap_FairValueInputsLongtermPreTaxOperatingMarginPercent / us-gaap_RangeAxis = us-gaap_MinimumMember | 19.90%us-gaap_FairValueInputsLongtermPreTaxOperatingMarginPercent / us-gaap_RangeAxis = us-gaap_MinimumMember | 17.40%us-gaap_FairValueInputsLongtermPreTaxOperatingMarginPercent / us-gaap_RangeAxis = us-gaap_MinimumMember
Market long-term revenue growth rates | 1.20%us-gaap_FairValueInputsLongTermRevenueGrowthRate / us-gaap_RangeAxis = us-gaap_MinimumMember | 1.90%us-gaap_FairValueInputsLongTermRevenueGrowthRate / us-gaap_RangeAxis = us-gaap_MinimumMember | 1.75%us-gaap_FairValueInputsLongTermRevenueGrowthRate / us-gaap_RangeAxis = us-gaap_MinimumMember
Maximum [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Discount rates | 12.40%us-gaap_FairValueInputsDiscountRate / us-gaap_RangeAxis = us-gaap_MaximumMember | 12.40%us-gaap_FairValueInputsDiscountRate / us-gaap_RangeAxis = us-gaap_MaximumMember | 12.20%us-gaap_FairValueInputsDiscountRate / us-gaap_RangeAxis = us-gaap_MaximumMember
Operating profit margin ranges | 36.40%us-gaap_FairValueInputsLongtermPreTaxOperatingMarginPercent / us-gaap_RangeAxis = us-gaap_MaximumMember | 35.80%us-gaap_FairValueInputsLongtermPreTaxOperatingMarginPercent / us-gaap_RangeAxis = us-gaap_MaximumMember | 35.80%us-gaap_FairValueInputsLongtermPreTaxOperatingMarginPercent / us-gaap_RangeAxis = us-gaap_MaximumMember
Market long-term revenue growth rates | 4.10%us-gaap_FairValueInputsLongTermRevenueGrowthRate / us-gaap_RangeAxis = us-gaap_MaximumMember | 3.30%us-gaap_FairValueInputsLongTermRevenueGrowthRate / us-gaap_RangeAxis = us-gaap_MaximumMember | 3.10%us-gaap_FairValueInputsLongTermRevenueGrowthRate / us-gaap_RangeAxis = us-gaap_MaximumMember

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- Definition Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Definition Long-term pre-tax operating income as a percentage of net sales, used as an input to measure fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Definition Percentage of assumed long-term growth in revenues, used as an input to measure fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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