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GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS: (Details Textual) (USD $) | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Jun. 30, 2012
Schedule Of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items] |  |  |  |  |  |  |
Indefinite-Lived License Agreements | $ 666,797,000 us-gaap_IndefiniteLivedLicenseAgreements | $ 659,824,000 us-gaap_IndefiniteLivedLicenseAgreements |  |  |  |  |
Amortization Of Intangible Assets | 27,100,000 us-gaap_AmortizationOfIntangibleAssets | 27,700,000 us-gaap_AmortizationOfIntangibleAssets | 28,400,000 us-gaap_AmortizationOfIntangibleAssets |  |  |  |
Deferred Finance Costs, Net | 4,600,000 us-gaap_DeferredFinanceCostsNet | 5,300,000 us-gaap_DeferredFinanceCostsNet | 4,500,000 us-gaap_DeferredFinanceCostsNet |  |  |  |
Impairment Testing [Member] |  |  |  |  |  |  |
Schedule Of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items] |  |  |  |  |  |  |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) | 0 us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill / us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis = roia_ImpairmentTestingMember | 14,900,000 us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill / us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis = roia_ImpairmentTestingMember | 313,000 us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill / us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis = roia_ImpairmentTestingMember |  |  |  |
2013 Interim Impairment Testing [Member] |  |  |  |  |  |  |
Schedule Of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items] |  |  |  |  |  |  |
Pre Tax Impairment Charges |  |  |  | 3,700,000 roia_PreTaxImpairmentCharges / us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis = roia_TwoThousandThirteenInterimImpairmentTestingMember | 9,800,000 roia_PreTaxImpairmentCharges / us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis = roia_TwoThousandThirteenInterimImpairmentTestingMember | 1,400,000 roia_PreTaxImpairmentCharges / us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis = roia_TwoThousandThirteenInterimImpairmentTestingMember |
2012 Interim Impairment Testing [Member] |  |  |  |  |  |  |
Schedule Of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items] |  |  |  |  |  |  |
Pre Tax Impairment Charges |  |  |  |  |  |  | $ 313,000 roia_PreTaxImpairmentCharges / us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis = roia_TwoThousandTweleveInterimImpairmentTestingMember

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Carrying amount (original costs adjusted for previously recognized amortization and impairment) as of the balance sheet date for the capitalized costs to acquire rights under a license arrangement (for example, to sell specified products in a specified territory) having an indefinite period of benefit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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