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GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS: (Details 2) (Radio Marketing Units [Member], USD $) | Oct. 01, 2014 | Oct. 01, 2013 | Oct. 01, 2012
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Schedule Of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items] |  |  |  |  |  |
Impairment charge (in millions) | $ 0 roia_PreTaxImpairmentCharges | [1] | $ 0 roia_PreTaxImpairmentCharges | [1] | $ 14,500,000 roia_PreTaxImpairmentCharges | [1]
Discount Rate | 9.50%roia_DiscountRate | [1] | 10.00%roia_DiscountRate | [1] | 10.00%roia_DiscountRate | [1]
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_StatementBusinessSegmentsAxis = roia_RadioMarketingUnitsMember | [1] | 0.00%roia_Year1MarketRevenueGrowthRange / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementBusinessSegmentsAxis = roia_RadioMarketingUnitsMember | [1] | 1.00%roia_Year1MarketRevenueGrowthRange / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementBusinessSegmentsAxis = roia_RadioMarketingUnitsMember | [1]
Long-term Market Revenue Growth Rate Range (Years 6 - 10) | 1.00%roia_LongTermMarketRevenueGrowthRateRange / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementBusinessSegmentsAxis = roia_RadioMarketingUnitsMember | [1] | 1.00%roia_LongTermMarketRevenueGrowthRateRange / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementBusinessSegmentsAxis = roia_RadioMarketingUnitsMember | [1] | 1.50%roia_LongTermMarketRevenueGrowthRateRange / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementBusinessSegmentsAxis = roia_RadioMarketingUnitsMember | [1]
Mature Market Share Range | 7.20%roia_MatureMarketShareRange / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementBusinessSegmentsAxis = roia_RadioMarketingUnitsMember | [1] | 7.10%roia_MatureMarketShareRange / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementBusinessSegmentsAxis = roia_RadioMarketingUnitsMember | [1] | 6.70%roia_MatureMarketShareRange / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementBusinessSegmentsAxis = roia_RadioMarketingUnitsMember | [1]
Operating Profit Margin Range | 26.40%roia_OperatingProfitMarginRange / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementBusinessSegmentsAxis = roia_RadioMarketingUnitsMember | [1] | 28.40%roia_OperatingProfitMarginRange / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementBusinessSegmentsAxis = roia_RadioMarketingUnitsMember | [1] | 29.30%roia_OperatingProfitMarginRange / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementBusinessSegmentsAxis = roia_RadioMarketingUnitsMember | [1]
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_StatementBusinessSegmentsAxis = roia_RadioMarketingUnitsMember | [1] | 2.00%roia_Year1MarketRevenueGrowthRange / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementBusinessSegmentsAxis = roia_RadioMarketingUnitsMember | [1] | 2.00%roia_Year1MarketRevenueGrowthRange / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementBusinessSegmentsAxis = roia_RadioMarketingUnitsMember | [1]
Long-term Market Revenue Growth Rate Range (Years 6 - 10) | 2.00%roia_LongTermMarketRevenueGrowthRateRange / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementBusinessSegmentsAxis = roia_RadioMarketingUnitsMember | [1] | 2.00%roia_LongTermMarketRevenueGrowthRateRange / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementBusinessSegmentsAxis = roia_RadioMarketingUnitsMember | [1] | 2.00%roia_LongTermMarketRevenueGrowthRateRange / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementBusinessSegmentsAxis = roia_RadioMarketingUnitsMember | [1]
Mature Market Share Range | 19.50%roia_MatureMarketShareRange / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementBusinessSegmentsAxis = roia_RadioMarketingUnitsMember | [1] | 19.80%roia_MatureMarketShareRange / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementBusinessSegmentsAxis = roia_RadioMarketingUnitsMember | [1] | 20.80%roia_MatureMarketShareRange / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementBusinessSegmentsAxis = roia_RadioMarketingUnitsMember | [1]
Operating Profit Margin Range | 52.20%roia_OperatingProfitMarginRange / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementBusinessSegmentsAxis = roia_RadioMarketingUnitsMember | [1] | 56.40%roia_OperatingProfitMarginRange / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementBusinessSegmentsAxis = roia_RadioMarketingUnitsMember | [1] | 58.50%roia_OperatingProfitMarginRange / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementBusinessSegmentsAxis = roia_RadioMarketingUnitsMember | [1]
[1] | Reflects the key assumptions for testing only those radio markets with remaining goodwill.

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- Definition This element represents the discount rate. + References No definition available. + Details
Name: | roia_DiscountRate
Namespace Prefix: | roia_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition This element represents the long term market revenue growth rate range. + References No definition available. + Details
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Namespace Prefix: | roia_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition This element represents the mature market share range. + References No definition available. + Details
Name: | roia_MatureMarketShareRange
Namespace Prefix: | roia_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition This element represents the operating profit margin range. + References No definition available. + Details
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Namespace Prefix: | roia_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition This element represents the amount of pre tax impairment charges. + References No definition available. + Details
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Namespace Prefix: | roia_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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Data Type: | xbrli:stringItemType
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- Definition This element represents the market revenue growth range. + References No definition available. + Details
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Namespace Prefix: | roia_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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