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Acquistions - Pro Forma Financial Information (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Business Combination Segment Allocation [Line Items] |  |
Pro forma net sales |  | $ 760,772
Pro forma income (loss) from continuing operations | $ (250,788) | 2,412
Pro forma net income (loss) |  | $ 140,100
Basic income (loss) from continuing operations per share (in us dollars per share) |  | $ 0.09
Diluted income (loss) from continuing operations per share (in us dollars per share) |  | $ 0.09
Paragon Medical |  |
Business Combination Segment Allocation [Line Items] |  |
Pro forma net sales | 825,891 |
Pro forma net income (loss) | $ (250,788) |
Basic income (loss) from continuing operations per share (in us dollars per share) | $ (7.92) |
Diluted income (loss) from continuing operations per share (in us dollars per share) | $ (7.92) |

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- Definition The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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