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Earnings Per Share - Computations of Basic and Diluted Earnings Per Share (Parenthetical) (Detail) - shares | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Aug. 21, 2020
Earnings Per Share Disclosure [Line Items] |  |  |  |  |
Weighted average shares of participating unvested restricted stock | 1,704,000 | 815,000 | 721,000 |  |
Interest rate | 4.50% | 4.50% |  |  |
4.50 % Convertible Senior Notes |  |  |  |  |
Earnings Per Share Disclosure [Line Items] |  |  |  |  |
Interest rate | 4.50% |  |  |  | 4.50%
Common shares issued | 32,051,000 |  |  |  |
Restricted Stock Units (RSUs) |  |  |  |  |
Earnings Per Share Disclosure [Line Items] |  |  |  |  |
Common equivalent shares for restricted stock units | 4,000 | 682,000 | 300,000 | [1] |
[1] | For the years ended December 31, 2020 and 2021, approximately 682 and 4 common equivalent shares for restricted stock units were excluded because they were anti-dilutive. (3) For the years ended December 31, 2020 and 2021, diluted loss per share excludes the conversion of the 4.500% Convertible Senior Notes into 32,051 shares of common stock, as well as outstanding warrants, as they would be anti-dilutive. See further discussion below.

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