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Earnings Per Share (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Sep. 30, 2021
Sep. 30, 2020
Numerator for EPS:                
Net income (loss) $ 20,183 $ 21,941 $ 26,408 $ (3,169) $ 19,882 $ 20,067 $ 68,532 $ 36,780
Less: Preferred stock dividends (3)     (3)     (8) (8)
Income (loss) available to common stockholders $ 20,180     $ (3,172)     $ 68,524 $ 36,772
Denominator for EPS:                
Weighted average common shares outstanding (in shares) 31,247     31,659     31,232 32,116
Plus: Assumed conversion of share-based compensation (in shares) 65     0     45 61
Assumed conversion of preferred stock (in shares) 25     0     25 25
Weighted average diluted common shares outstanding (in shares) 31,337     31,659     31,302 32,202
Basic earnings (loss) per common share (in USD per share) $ 0.65     $ (0.10)     $ 2.19 $ 1.14
Diluted earnings (loss) per common share (in USD per share) $ 0.64     $ (0.10)     $ 2.19 $ 1.14