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Goodwill and Identifiable Intangible Assets - Significant Assumptions Used to Estimate the Fair Value of Tradename Impaired (Detail) - Tradename [Member]
Dec. 31, 2020
Discount Rate [Member]  
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]  
Assumptions used to estimate the fair values 0.158
Royalty Rate [Member]  
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]  
Assumptions used to estimate the fair values 0.050 [1]
Long-term Revenue Growth Rate [Member]  
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]  
Assumptions used to estimate the fair values 0.030 [2]
[1] Represents estimated percentage of sales a market-participant would pay to license the impaired tradename.
[2] Selected long-term revenue growth rate within 10-year projection period of the impaired tradename.