Goodwill - Schedule of Reporting Unit Fair Value in Excess of Carrying Amount Based on Impairment Test (Detail) - Goodwill [Member]  | 
Sep. 30, 2022  | 
Jun. 30, 2022  | 
Dec. 31, 2021  | 
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| Digital Media [Member] | |||
| Schedule Of Reporting Unit Fair Value And Carrying Value Based On Goodwill Impairment Test [Line Items] | |||
| Excess Fair Value | 161.90% | 141.70% | 122.50% | 
| Publishing [Member] | |||
| Schedule Of Reporting Unit Fair Value And Carrying Value Based On Goodwill Impairment Test [Line Items] | |||
| Excess Fair Value | 3.20% | 4.00% | 113.20% | 
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- Definition Schedule of reporting unit fair value and carrying value based on goodwill impairment test. No definition available. 
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- Definition Percentage of fair value of reporting unit in excess of carrying amount. No definition available. 
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