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v3.23.1

Goodwill - Summary of Key Assumptions Used in the Discounted Cash Flow Analyses (Detail) | 3 Months Ended | 12 Months Ended
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Dec. 31, 2022 | Jun. 30, 2022 | Dec. 31, 2022
Minimum [Member] |  |  |
Disclosure in tabular form of assumptions used in determination of fair value of goodwill [Line Items] |  |  |
Operating income margins | 19.70% | 19.20% |
Maximum [Member] |  |  |
Disclosure in tabular form of assumptions used in determination of fair value of goodwill [Line Items] |  |  |
Operating income margins | 30.40% | 32.60% |
Measurement Input, Long-term Revenue Growth Rate [Member] | Minimum [Member] |  |  |
Disclosure in tabular form of assumptions used in determination of fair value of goodwill [Line Items] |  |  |
Revenue growth rates | 0.30% | (1.90%) |
Measurement Input, Long-term Revenue Growth Rate [Member] | Maximum [Member] |  |  |
Disclosure in tabular form of assumptions used in determination of fair value of goodwill [Line Items] |  |  |
Revenue growth rates | 2.70% | 15.90% |
Measurement Input, Discount Rate [Member] |  |  |
Disclosure in tabular form of assumptions used in determination of fair value of goodwill [Line Items] |  |  |
Revenue growth rates | 9.50% | 9.50% |
Goodwill [Member] | Minimum [Member] |  |  |
Disclosure in tabular form of assumptions used in determination of fair value of goodwill [Line Items] |  |  |
Operating income margins |  |  | 5.40%
Goodwill [Member] | Maximum [Member] |  |  |
Disclosure in tabular form of assumptions used in determination of fair value of goodwill [Line Items] |  |  |
Operating income margins |  |  | 29.80%
Goodwill [Member] | Measurement Input, Long-term Revenue Growth Rate [Member] | Minimum [Member] |  |  |
Disclosure in tabular form of assumptions used in determination of fair value of goodwill [Line Items] |  |  |
Revenue growth rates |  |  | (1.90%)
Goodwill [Member] | Measurement Input, Long-term Revenue Growth Rate [Member] | Maximum [Member] |  |  |
Disclosure in tabular form of assumptions used in determination of fair value of goodwill [Line Items] |  |  |
Revenue growth rates |  |  | 11.10%
Goodwill [Member] | Measurement Input, Discount Rate [Member] |  |  |
Disclosure in tabular form of assumptions used in determination of fair value of goodwill [Line Items] |  |  |
Revenue growth rates |  |  | 9.50%
Boston, MA radio market cluster [Member] | Goodwill [Member] |  |  |
Disclosure in tabular form of assumptions used in determination of fair value of goodwill [Line Items] |  |  |
Operating income margins |  |  | 13.10%
Boston, MA radio market cluster [Member] | Goodwill [Member] | Measurement Input, Long-term Revenue Growth Rate [Member] | Minimum [Member] |  |  |
Disclosure in tabular form of assumptions used in determination of fair value of goodwill [Line Items] |  |  |
Revenue growth rates |  |  | 0.50%
Boston, MA radio market cluster [Member] | Goodwill [Member] | Measurement Input, Long-term Revenue Growth Rate [Member] | Maximum [Member] |  |  |
Disclosure in tabular form of assumptions used in determination of fair value of goodwill [Line Items] |  |  |
Revenue growth rates |  |  | 11.40%
Boston, MA radio market cluster [Member] | Goodwill [Member] | Measurement Input, Discount Rate [Member] |  |  |
Disclosure in tabular form of assumptions used in determination of fair value of goodwill [Line Items] |  |  |
Revenue growth rates |  |  | 9.50%

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