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Share-Based Compensation - Summary of Nonvested Stock Option Activity and Related Information (Detail) - Stock Option
shares in Thousands
 12 Months Ended
Dec. 31, 2020
$ / shares
shares
Shares  
Non-vested stock options outstanding at the beginning of the year (in shares) | shares 2,066
Nonvested stock options, granted (in shares) | shares 963
Nonvested stock options, Vested (in shares) | shares (1,002)
Nonvested stock options, Forfeited (in shares) | shares (121)
Non-vested stock options outstanding at the end of the year (in shares) | shares 1,906
Weighted Average Grant Date Fair Value  
Non-vested stock options outstanding at the beginning of the year, weighted average grant date fair value (in USD per share) | $ / shares $ 14.17
Weighted average grant date fair value, Granted (in USD per share) | $ / shares 11.01
Weighted average grant date fair value, Vested (in USD per share) | $ / shares 12.90
Weighted average grant date fair value, Forfeited (in USD per share) | $ / shares 12.45
Non-vested stock options outstanding at the the end of the year, weighted average grant date fair value (in USD per share) | $ / shares $ 13.34