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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, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Earnings Per Share [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net income attributable to continuing operations | $ (32,984) | $ 32,066 | $ 12,532 | $ 14,413 | $ 25,216 | $ 25,486 | $ 29,306 | $ 12,683 | $ 26,027 | $ 92,691 | $ 69,590
Preferred stock dividends |  |  |  |  |  |  |  |  | 42 | 42 | 41
Income from continuing operations available to common equity |  |  |  |  |  |  |  |  | 25,985 | 92,649 | 69,549
Dividends and undistributed earnings allocated to participating securities |  |  |  |  |  |  |  |  | (62) | (144) | (192)
Income from continuing operations available to common shareholders |  |  |  |  |  |  |  |  | 25,923 | 92,505 | 69,357
Net (loss) income attributable to discontinued operations | $ 0 | $ 0 | $ 0 | $ 0 | $ (300) | $ (1,300) | $ 1,777 | $ (932) | 0 | (755) | 1,217
Preferred stock dividends |  |  |  |  |  |  |  |  | 0 | 0 | (1)
(Loss) income from discontinued operations available to common equity |  |  |  |  |  |  |  |  | 0 | (755) | 1,216
Dividends and undistributed earnings allocated to participating securities |  |  |  |  |  |  |  |  | 0 | 1 | (3)
(Loss) income from discontinued operations available to common shareholders |  |  |  |  |  |  |  |  | $ 0 | $ (754) | $ 1,213
Basic weighted-average shares outstanding |  |  |  |  |  |  |  |  | 37,997 | 37,456 | 37,293
Stock options and other stock compensation |  |  |  |  |  |  |  |  | 700 | 530 | 417
Diluted weighted-average shares outstanding |  |  |  |  |  |  |  |  | 38,697 | 37,986 | 37,710
Antidilutive stock options |  |  |  |  |  |  |  |  | 0 | 0 | 658
Earnings per share attributable to continuing operations: |  |  |  |  |  |  |  |  |  |  |
Earnings per share attributable to continuing operations, basic (dollars per share) | $ (0.87) | $ 0.84 | $ 0.33 | $ 0.38 | $ 0.67 | $ 0.68 | $ 0.78 | $ 0.34 | $ 0.68 | $ 2.47 | $ 1.86
Earnings per share attributable to continuing operations, diluted (dollars per share) | (0.87) | 0.83 | 0.32 | 0.37 | 0.66 | 0.67 | 0.77 | 0.34 | 0.67 | 2.44 | 1.84
(Loss) earnings per share attributable to discontinued operations: |  |  |  |  |  |  |  |  |  |  |
Earnings per share attributable to discontinued operations, basic (dollars per share) | 0.00 | 0.00 | 0.00 | 0.00 | (0.01) | (0.04) | 0.05 | (0.03) | 0.00 | (0.02) | 0.03
Earnings per share attributable to discontinued operations, diluted (dollars per share) | $ 0.00 | $ 0.00 | $ 0.00 | $ 0.00 | $ (0.01) | $ (0.04) | $ 0.05 | $ (0.03) | $ 0.00 | $ (0.02) | $ 0.03

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