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Earnings Per Share - Reconciliation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 12 Months Ended
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Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Earnings Per Share [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Net (loss)/income | $ (25,880) | $ 4,152 | $ 2,479 | $ 8,824 | $ (11,564) | $ 22,049 | $ 16,724 | $ 9,424 | $ (10,425) |  | $ 36,633 | $ 27,199
Less: Income distributed to participating securities |  |  |  |  |  |  |  |  | (2,163) |  | (1,595) | (696)
Less: Undistributed income allocable to participating securities |  |  |  |  |  |  |  |  |  |  | (1,409) |
Net (loss)/income available to common stockholders – Basic EPS |  |  |  |  |  |  |  |  | $ (12,588) |  | $ 33,629 | $ 26,503
Weighted average common shares (in thousands) |  |  |  |  |  |  |  |  | 151,823 |  | 146,645 | 134,614
Basic (loss)/earnings per share | $ (0.17) | $ 0.02 | $ 0.01 | $ 0.05 | $ (0.08) | $ 0.13 | $ 0.10 | $ 0.07 | $ (0.08) |  | $ 0.23 | $ 0.20
Net (loss)/income available to common stockholders |  |  |  |  |  |  |  |  | $ (12,588) |  | $ 33,629 | $ 26,503
Add back: Undistributed income allocable to participating securities |  |  |  |  |  |  |  |  |  |  | 1,409 |
Less: Reallocation of undistributed income allocable to participating securities considered potentially dilutive |  |  |  |  |  |  |  |  |  |  | (1,403) |
Net (loss)/income available to common stockholders – Diluted EPS |  |  |  |  |  |  |  |  | $ (12,588) |  | $ 33,635 | $ 26,503
Weighted average common shares |  |  |  |  |  |  |  |  | 151,823 |  | 146,645 | 134,614
Dilutive effect of common stock equivalents, excluding participating securities |  |  |  |  |  |  |  |  |  |  | 645 | 944
Weighted average diluted shares |  |  |  |  |  |  |  |  | 151,823 | [1] | 147,290 | 135,558
Diluted earnings per share | $ (0.17) | $ 0.02 | $ 0.01 | $ 0.05 | $ (0.08) | $ 0.13 | $ 0.10 | $ 0.07 | $ (0.08) |  | $ 0.23 | $ 0.20
[1] | Excludes participating securities and potentially dilutive common stock equivalents as the Company reported a net loss for the period.

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