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Stock-Based Compensation Plans - Summary of Status of Company's Non-Vested Restricted Shares (Detail) - Restricted Stock [Member] - $ / shares
shares in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Nonvested, Shares, Beginning Balance 491    
Granted, Shares 395    
Vested, Shares (176)    
Forfeited, Shares (47)    
Nonvested, Shares, Ending Balance 663 491  
Nonvested, Weighted Average Fair Value, Beginning Balance $ 19.36    
Granted, Weighted Average Fair Value 20.43 $ 18.20 $ 20.76
Vested, Weighted Average Fair Value 19.51    
Forfeited, Weighted Average Fair Value 21.23    
Nonvested, Weighted Average Fair Value, Ending Balance $ 19.83 $ 19.36