Additional capital contributions to related party.

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Number of units owned in related party.

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Debt instrument bearing interest rate.

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Lessee Leasing Arrangements Operating Leases Number Of Automatic Renewals

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Number of radio towers sold to unrelated party.

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Monthly repayment amount of prepaid rent that was met by related party on behalf of the company to unrelated party.

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Repayments of prepaid rent that was met by related party on behalf of the company to unrelated party.

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Number of stations leasing towers from related party.

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Number of radio towers sold to related party.

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Amount of gain on the sale of property that does not qualify for gain recognition as of the balance sheet date.

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Carrying amount as of the balance sheet date of obligations due all related parties.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

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Date which lease or group of leases is set to expire, in CCYY-MM-DD format.

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Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Related Party Transactions - Additional Information (Detail)												12 Months Ended
	Feb. 22, 2017 USD ($)	May 03, 2016 USD ($)	Nov. 17, 2015 USD ($) Tower	Oct. 16, 2015 USD ($)	Apr. 03, 2015 USD ($)	Apr. 04, 2014 USD ($)	Apr. 10, 2013 USD ($)	Jul. 31, 2012 USD ($)	Feb. 14, 2012 USD ($)	Mar. 25, 2011 USD ($) shares	Aug. 04, 2006 Radio_Stations	Dec. 31, 2017 USD ($) Radio_Stations	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($) Tower Automatic_Renewal
Related Party Transaction [Line Items]
Lease or rental expense												$ 9,600,000	$ 4,400,000
Proceeds from sale of tower												35,000,000
Beasley Broadcasting Management, LLC [Member]
Related Party Transaction [Line Items]
Lease or rental expense												200,000	200,000
Beasley Family Towers Inc [Member]
Related Party Transaction [Line Items]
Lease or rental expense												12,000	12,000
Lease agreement expiration date														Dec. 31, 2025
Number of automatic renewals \| Automatic_Renewal														4
Renewal term of lease agreement														5 years
Deferred gain on sale														$ 800,000
Beasley Family Towers Inc [Member] \| April 30, 2021 [Member]
Related Party Transaction [Line Items]
Lease or rental expense												$ 0	0
Lease agreement expiration date												Apr. 30, 2021
Number of radio towers sold to unrelated party \| Tower			2
Monthly repayment of prepaid rent to related party			$ 5,500
Repayment of prepaid rent to related party												$ 66,000	66,000
Beasley Family Towers Inc [Member] \| April 30, 2021 [Member] \| Prepaid Rent [Member]
Related Party Transaction [Line Items]
Prepaid expense paid by related party			$ 700,000
Beasley Family Towers Inc [Member] \| December 28, 2020 [Member]
Related Party Transaction [Line Items]
Lease or rental expense												$ 400,000	500,000
Lease agreement expiration date												Dec. 28, 2020
Number of radio towers leased for radio stations under separate lease agreements \| Radio_Stations												19
Beasley Family Towers Inc [Member] \| Augusta GA [Member]
Related Party Transaction [Line Items]
Number of radio towers sold for radio station \| Tower														1
Proceeds from sale of tower														$ 1,300,000
Beasley Family Towers Inc [Member] \| Boca Raton, FL [Member] \| April 30, 2021 [Member]
Related Party Transaction [Line Items]
Number of radio towers leased for radio stations under separate lease agreements \| Radio_Stations											1
GGB Augusta, LLC [Member]
Related Party Transaction [Line Items]
Lease or rental expense												$ 42,000	42,000
Lease agreement expiration date												Nov. 01, 2023
GGB Estero, LLC [Member]
Related Party Transaction [Line Items]
Lease or rental expense												$ 200,000	200,000
Lease agreement expiration date												Aug. 31, 2019
GGB Las Vegas, LLC [Member]
Related Party Transaction [Line Items]
Lease or rental expense												$ 200,000	200,000
Lease agreement expiration date												Dec. 31, 2018
LN2 DB, LLC [Member]
Related Party Transaction [Line Items]
Additional contribution to related party	$ 150,000	$ 166,667			$ 166,667	$ 104,167	$ 104,167	$ 104,167	$ 62,500	$ 250,000
Related party stock purchase \| shares										25,000
Percentage of outstanding units ownership interest in Investee		20.00%			20.00%	20.00%	20.00%	20.00%		20.00%
Note bearing interest rate	18.00%
Wintersrun Communications Inc [Member]
Related Party Transaction [Line Items]
Lease or rental expense												$ 100,000	100,000
Lease agreement expiration date														Dec. 31, 2025
Number of automatic renewals \| Automatic_Renewal														4
Renewal term of lease agreement														5 years
Deferred gain on sale														$ 300,000
Number of radio towers leased for radio stations under separate lease agreements \| Radio_Stations												1
Monthly repayment of prepaid rent to related party				$ 2,559
Repayment of prepaid rent to related party												$ 31,000	$ 31,000
Wintersrun Communications Inc [Member] \| Prepaid Rent [Member]
Related Party Transaction [Line Items]
Prepaid expense paid by related party				$ 300,000
Wintersrun Communications Inc [Member] \| Charlotte, NC [Member]
Related Party Transaction [Line Items]
Number of radio towers sold for radio station \| Tower														1
Proceeds from sale of tower														$ 400,000