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GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS: (Details) (Income Approach Valuation Technique [Member], USD $)
Oct. 01, 2014
Oct. 01, 2013
Oct. 01, 2012
Schedule Of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items]      
Impairment charge (in millions) $ 0roia_PreTaxImpairmentCharges $ 0roia_PreTaxImpairmentCharges $ 0roia_PreTaxImpairmentCharges
Discount Rate 9.50%roia_DiscountRate 10.00%roia_DiscountRate 10.00%roia_DiscountRate
Minimum [Member]      
Schedule Of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items]      
Year 1 Market Revenue Growth Rate Range 0.30%roia_Year1MarketRevenueGrowthRange
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember		 0.00%roia_Year1MarketRevenueGrowthRange
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember		 1.00%roia_Year1MarketRevenueGrowthRange
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember
Long-term Market Revenue Growth Rate Range (Years 6 - 10) 1.00%roia_LongTermMarketRevenueGrowthRateRange
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember		 1.00%roia_LongTermMarketRevenueGrowthRateRange
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember		 1.00%roia_LongTermMarketRevenueGrowthRateRange
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember
Mature Market Share Range 6.90%roia_MatureMarketShareRange
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember		 6.40%roia_MatureMarketShareRange
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember		 0.70%roia_MatureMarketShareRange
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember
Operating Profit Margin Range 30.00%roia_OperatingProfitMarginRange
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember		 30.80%roia_OperatingProfitMarginRange
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember		 19.60%roia_OperatingProfitMarginRange
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember
Maximum [Member]      
Schedule Of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items]      
Year 1 Market Revenue Growth Rate Range 1.00%roia_Year1MarketRevenueGrowthRange
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember		 2.00%roia_Year1MarketRevenueGrowthRange
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember		 2.00%roia_Year1MarketRevenueGrowthRange
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember
Long-term Market Revenue Growth Rate Range (Years 6 - 10) 2.00%roia_LongTermMarketRevenueGrowthRateRange
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember		 2.00%roia_LongTermMarketRevenueGrowthRateRange
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember		 2.00%roia_LongTermMarketRevenueGrowthRateRange
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember
Mature Market Share Range 25.20%roia_MatureMarketShareRange
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember		 26.90%roia_MatureMarketShareRange
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember		 27.40%roia_MatureMarketShareRange
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember
Operating Profit Margin Range 48.40%roia_OperatingProfitMarginRange
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember		 47.80%roia_OperatingProfitMarginRange
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember		 47.70%roia_OperatingProfitMarginRange
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember