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Stock-Based Compensation - Summary of Market-Based Shares Vesting Activity (Detail) - Market-Based Shares [Member] - Market-based [Member] - Vest Date September 11, 2021 [Member]
$ in Thousands
9 Months Ended
Sep. 30, 2021
USD ($)
shares
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]  
Date Vested Sep. 11, 2021
Number of Shares Vested 138,500
Compensation Cost Recognized Upon Vesting | $ $ 5,000
Shares Withheld for Taxes 60,300