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Commitments and Contingencies (Details Textual) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011
Commitments and Contingencies (Textual) [Abstract] |  |
Operating leases of property and equipment from third parties, Minimum | 5 years |
Operating leases of property and equipment from third parties, Maximum | 30 years |
Lease expense | $ 2.5 | $ 2.4

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- Details
Name: | bbgi_CommitmentsAndContingenciesTextualAbstract
Namespace Prefix: | bbgi_
Data Type: | xbrli:stringItemType
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- Definition Operating leases maximum expiration term. + References No definition available. + Details
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Namespace Prefix: | bbgi_
Data Type: | xbrli:durationItemType
Balance Type: | na
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- Definition Operating leases minimum expiration term. + References No definition available. + Details
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- Definition Rental expense incurred for leased assets including furniture and equipment which has not been recognized in costs and expenses applicable to sales and revenues; for example, cost of goods sold or other operating costs and expenses. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration