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Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Jan. 01, 2019
Summary Of Significant Accounting Policies [Line Items] |  |  |
Renewable terms of FCC broadcasting licenses | 8 years |  |
Weighted-average period before the next renewal of the Company's FCC broadcasting licenses | 4 years 4 months 24 days |  |
Operating Lease, Liability | $ 36,711,218 |  |
Operating Lease, Right-of-Use Asset | 34,419,663 | $ 39,768,910 |
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Retained Earnings | $ 143,304,213 | $ 162,350,145 |
OutlawsXP Inc [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Equity method investment, ownership percentage | 90.00% |  |
Renegades Holdings, Inc. [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Equity method investment, ownership percentage | 51.00% |  |
Accounting Standards Update 2016-02 [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Operating Lease, Liability |  |  | $ 43,100,000
Operating Lease, Right-of-Use Asset |  |  | 38,800,000
Accounting Standards Update 2016-02 [Member] | Revision of Prior Period, Adjustment [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Retained Earnings |  |  | $ 900,000
Geographic Concentration Risk [Member] | Sales Revenue, Net [Member] | Boston, MA, Philadelphia, PA and Tampa-Saint Petersburg, FL [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Radio stations contributed to net revenue | 66.30% | 60.70% |

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