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Income (Loss) per Share - Basic and Diluted Loss 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
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Net income (loss) | $ 27,786 | $ (18,673)
Undistributed income allocated to participating securities | 299 | 0
Numerator for diluted income (loss) per common share | 27,487 | (18,673)
Plus: Net income effect of convertible securities | 2,509 | 0
Numerator for diluted income (loss) per common share | $ 29,996 | $ (18,673)
Basic weighted-average common stock shares outstanding (in shares) | 45,476 | 40,974
Dilutive effects of common stock equivalents (in shares) | 6,389 | 0
Diluted weighted-average common stock shares outstanding (in shares) | 51,865 | 40,974
Income (loss) per common share, basic (USD per share) | $ 0.60 | $ (0.46)
Income (loss) per common share, diluted (USD per share) | $ 0.58 | $ (0.46)
Employee Stock Option |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Weighted average number of shares issuable under the common stock warrants (in shares) | 352 | 345
Employee Stock Option |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Antidilutive securities excluded from computation of earnings per share (in shares) | 2,000 | 658
Restricted Stock |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Antidilutive securities excluded from computation of earnings per share (in shares) | 120 | 439

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- Definition Amount of increase (decrease) to net income used for calculating diluted earnings per share (EPS), resulting from the assumed exercise stock options, restrictive stock units (RSUs), convertible preferred stock of an employee stock ownership plan (ESOP), and other dilutive convertible securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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