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Income (Loss) Per Share - Shares Excluded from EPS (Details) - shares shares in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Unvested participating shares |  |  |
Basic income (loss) per share |  |  |
Unvested participating shares excluded from basic weighted average shares outstanding since the securityholders are not obligated to fund losses | 72 | 312 | 1,017
Common Stock |  |  |
Diluted income (loss) per share |  |  |
Common share equivalents excluded from the diluted weighted average shares outstanding since Veeco incurred a net loss and their effect would be antidilutive | 239 | 107 | 146
Non-Participating shares |  |  |
Diluted income (loss) per share |  |  |
Shares excluded from the diluted calculation as their effect would be antidilutive | 1,744 | 1,896 | 2,111
Convertible Senior Notes |  |  |
Diluted income (loss) per share |  |  |
Shares excluded from the diluted calculation as their effect would be antidilutive | 8,618 |  |

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Antidilution -URI http://asc.fasb.org/extlink&oid=6505113 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Diluted Earnings Per Share -URI http://asc.fasb.org/extlink&oid=6510752 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Contingent Stock Agreement -URI http://asc.fasb.org/extlink&oid=6508534 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition Securities excluded from the computation of diluted net loss per share, due to a net loss incurred by the Company during the period, as their effect would be antidilutive. + References No definition available. + Details
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- Definition Securities excluded from the computation of basic net loss per share since securities' holders are not obligated to fund those losses. + References No definition available. + Details
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