Summary of Significant Accounting Policies - Additional Information (Detail) $ in Millions	12 Months Ended
Dec. 31, 2024 USD ($) Segment	Dec. 31, 2023 USD ($)
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
Number of operating segments	2
Number of reportable segments	2
Quu Inc [Member]
Summary Of Significant Accounting Policies [Line Items]
Investment carrying amount \| $	$ 1.9	$ 1.8
Geographic Concentration Risk [Member] \| Sales Revenue, Net [Member] \| Boston MA Detroit MI And Philadelphia PA [Member]
Summary Of Significant Accounting Policies [Line Items]
Radio stations contributed to net revenue	58.00%	58.00%

The renewable term generally granted by the FCC for radio broadcasting licenses.

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Weighted-average period before the next renewal of the company's FCC broadcasting licenses.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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