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Stock-Based Compensation - Schedule of Information Related to Outstanding SOSARS (Detail) - Stock Only Stock Appreciation Rights (SOSARs) [Member] - $ / shares
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Beginning Balance, Outstanding 1,082,413 1,291,947
Granted
Exercised (44,710)
Canceled / forfeited (2,841)
Ending Balance, Outstanding 1,082,413 1,244,396
Beginning Balance, Weighted Average Exercise Price, Outstanding $ 20.40 $ 20.05
Weighted Average Exercise Price, Granted
Weighted Average Exercise Price, Exercised 12.94
Weighted Average Exercise Price, Canceled / forfeited 17.27
Ending Balance, Weighted Average Exercise Price, Outstanding $ 20.40 $ 20.31