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Net Income (Loss) Per Common Share - Summary of Net Income (Loss) Per Share (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Earnings Per Share [Abstract]        
Net loss $ (21,748) $ (7,283) $ (269,939) $ (26,801)
Less: Preferred Stock cumulative dividends and deemed dividends (3,043) 0 (5,994) 0
Numerator for basic and diluted net income (loss) per common share $ (24,791) $ (7,283) $ (275,933) $ (26,801)
Weighted average common shares outstanding, basic and diluted 42,197 42,028 42,154 42,000
Basic - net loss per share (in dollars per share) $ (0.59) $ (0.17) $ (6.55) $ (0.64)
Diluted - net loss per share (in dollars per share) (0.59) (0.17) (6.55) (0.64)
Cash dividends declared per share (in dollars per share) $ 0 $ 0.07 $ 0 $ 0.14