Loss per Share - Additional Information (Detail) - shares |
3 Months Ended | |
---|---|---|
Mar. 31, 2020 |
Mar. 31, 2019 |
|
Earnings Per Share [Line Items] | ||
Potentially dilutive securities excluded from computation of earnings per share | 1,700,000 | 1,893,000 |
Performance-vesting Restricted Awards [Member] | ||
Earnings Per Share [Line Items] | ||
Contingently issuable shares excluded from the calculation of diluted loss per share | 1,696,000 | 2,295,000 |