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Earnings per Share - Schedule Of 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, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Earnings Per Share [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net income attributable to continuing operations | $ 24,883 | $ 33,717 | $ 33,179 | $ 32,371 | $ (32,984) | $ 32,066 | $ 12,532 | $ 14,413 | $ 124,150 | $ 26,027 | $ 92,691
Preferred stock dividends |  |  |  |  |  |  |  |  | 42 | 42 | 42
Income from continuing operations available to common equity |  |  |  |  |  |  |  |  | 124,108 | 25,985 | 92,649
Dividends and undistributed earnings allocated to participating securities |  |  |  |  |  |  |  |  | (117) | (62) | (144)
Income from continuing operations available to common shareholders |  |  |  |  |  |  |  |  | 123,991 | 25,923 | 92,505
Net loss attributable to discontinued operations |  |  |  |  |  |  |  |  | 0 | 0 | (755)
Preferred stock dividends |  |  |  |  |  |  |  |  | 0 | 0 | 0
Loss from discontinued operations available to common equity |  |  |  |  |  |  |  |  | 0 | 0 | (755)
Dividends and undistributed earnings allocated to participating securities |  |  |  |  |  |  |  |  | 0 | 0 | 1
Loss from discontinued operations available to common shareholders |  |  |  |  |  |  |  |  | $ 0 | $ 0 | $ (754)
Basic weighted-average shares outstanding |  |  |  |  |  |  |  |  | 38,362 | 37,997 | 37,456
Stock options and other stock compensation |  |  |  |  |  |  |  |  | 599 | 700 | 530
Diluted weighted-average shares outstanding |  |  |  |  |  |  |  |  | 38,961 | 38,697 | 37,986
Antidilutive stock options |  |  |  |  |  |  |  |  | 0 | 0 | 0
Earnings per share attributable to continuing operations: |  |  |  |  |  |  |  |  |  |  |
Earnings per share attributable to continuing operations, basic (dollars per share) | $ 0.65 | $ 0.88 | $ 0.86 | $ 0.85 | $ (0.87) | $ 0.84 | $ 0.33 | $ 0.38 | $ 3.23 | $ 0.68 | $ 2.47
Earnings per share attributable to continuing operations, diluted (dollars per share) | $ 0.64 | $ 0.86 | $ 0.85 | $ 0.83 | $ (0.87) | $ 0.83 | $ 0.32 | $ 0.37 | 3.18 | 0.67 | 2.44
Loss per share attributable to discontinued operations: |  |  |  |  |  |  |  |  |  |  |
Earnings per share attributable to discontinued operations, basic (dollars per share) |  |  |  |  |  |  |  |  | 0.00 | 0.00 | (0.02)
Earnings per share attributable to discontinued operations, diluted (dollars per share) |  |  |  |  |  |  |  |  | $ 0.00 | $ 0.00 | $ (0.02)

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