Weighted Average Common Shares - Additional Information (Detail) - shares |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
|
Employee Stock Option [Member] | |||
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] | |||
Anti-dilutive awards excluded from computations of diluted earnings per share | 700,000 | 800,000 | |
Common Stock [Member] | |||
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] | |||
Weighted average number of shares issued | 16,000 | 24,000 | 37,000 |
Shares repurchased under stock repurchase program | 200,000 | ||
Common Stock [Member] | Maximum [Member] | |||
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] | |||
Weighted average number of shares issued | 100,000 | 100,000 | 100,000 |