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Shareholders' Equity - Summary of Information about Stock Options Outstanding (Detail)
shares in Thousands
12 Months Ended
Dec. 31, 2020
$ / shares
shares
Exercise Price $15.36 - $24.99 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price, Lower Range Limit $ 15.36
Exercise Price, Upper Range Limit $ 24.99
Number Outstanding | shares 105
Remaining Contractual Life (Years), Outstanding 9 years 7 months 9 days
Weighted Average Price, Outstanding $ 15.36
Number Exercisable | shares 0
Weighted Average Price, Exercisable $ 0
Exercise Price $25.01 - $34.99 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price, Lower Range Limit 25.01
Exercise Price, Upper Range Limit $ 34.99
Number Outstanding | shares 100
Remaining Contractual Life (Years), Outstanding 7 years 8 months 1 day
Weighted Average Price, Outstanding $ 29.55
Number Exercisable | shares 75
Remaining Contractual Life (Years), Exercisable 7 years 8 months 1 day
Weighted Average Price, Exercisable $ 29.55
Exercise Price $35.01 - $39.54 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price, Lower Range Limit 35.01
Exercise Price, Upper Range Limit $ 39.54
Number Outstanding | shares 100
Remaining Contractual Life (Years), Outstanding 8 years 8 months 1 day
Weighted Average Price, Outstanding $ 39.54
Number Exercisable | shares 42
Remaining Contractual Life (Years), Exercisable 8 years 8 months 1 day
Weighted Average Price, Exercisable $ 39.54
Exercise Price $15.36 - $39.54 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price, Lower Range Limit 15.36
Exercise Price, Upper Range Limit $ 39.54
Number Outstanding | shares 305
Remaining Contractual Life (Years), Outstanding 8 years 8 months 1 day
Weighted Average Price, Outstanding $ 27.94
Number Exercisable | shares 117
Remaining Contractual Life (Years), Exercisable 8 years 10 days
Weighted Average Price, Exercisable $ 33.12