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Per Share Data and Stockholders' Equity - Dilutive Effect on Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended
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Mar. 31, 2017 | Mar. 31, 2016
Earnings Per Share [Abstract] |  |
Weighted Average Shares, Basic | 44,791 | 46,950
Weighted Average Shares, Stock compensation plans |  | 172
Weighted Average Shares, Diluted | 44,791 | 47,122
Income (Loss) From Continuing Operations, Amount | $ (20) | $ 14,464
Participating securities income (loss) from continuing operations non-vested restricted stock |  | (6)
Income (Loss) From Continuing Operations, Basic, Amount | (20) | 14,458
Income (Loss) From Continuing Operations Diluted, Amount | (20) | $ 14,458
Income (Loss) From Continuing Operations, Basic, Per Share Amount |  | $ 0.31
Income (Loss) From Continuing Operations, Diluted, Per Share Amount |  | $ 0.31
Income (Loss) From Discontinued Operations, Earnings (loss), Amount | (521) | $ 160
Income (Loss) From Discontinued Operations, Basic earnings (loss), Amount | (521) | 160
Income (Loss) From Discontinued Operations, Diluted earnings (loss), Amount | $ (521) | 160
Income (Loss) From Discontinued Operations, Basic earnings (loss), Per Share Amount | $ (0.01) |
Income (Loss) From Discontinued Operations, Diluted earnings (loss), Per Share Amount | $ (0.01) |
Net Income (Loss), Amount | $ (541) | 14,624
Net Income (Loss), Basic, Amount | (541) | 14,618
Net Income (Loss), Diluted, Amount | $ (541) | $ 14,618
Net Income (Loss), Basic, Per Share Amount | $ (0.01) | $ 0.31
Net Income (Loss), Diluted, Per Share Amount | $ (0.01) | $ 0.31

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