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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Income Statement [Abstract] |  |  |
Total revenue, net | $ 992,075 | $ 882,734 | $ 796,717
Costs and Expenses: |  |  |
Cost of goods sold | 349,089 | 326,542 | 302,946
Research and development | 58,155 | 50,895 | 43,559
Selling, general and administrative | 455,629 | 415,757 | 375,545
Intangible asset amortization | 13,862 | 9,953 | 6,810
Total costs and expenses | 876,735 | 803,147 | 728,860
Operating income | 115,340 | 79,587 | 67,857
Interest income | 24 | 30 | 168
Interest expense | (25,803) | (23,534) | (21,967)
Other income (expense), net | 845 | 4,588 | (492)
Income from continuing operations before income taxes | 90,406 | 60,671 | 45,566
Provision for income taxes | 15,842 | 53,820 | 9,271
Net income from continuing operations | 74,564 | 6,851 | 36,295
Loss from discontinued operations (net of tax benefit) | 0 | (10,370) | (2,291)
Net income (loss) | $ 74,564 | $ (3,519) | $ 34,004
Net income (loss) per share - basic: |  |  |
Income from continuing operations (in dollars per share) | $ 1.00 | $ 0.10 | $ 0.56
Loss from discontinued operations (in dollars per share) | 0.00 | (0.15) | (0.04)
Net income (loss) per share - basic (in dollars per share) | 1.00 | (0.05) | 0.52
Net income (loss) per share - diluted: |  |  |
Income from continuing operations (in dollars per share) | 0.94 | 0.10 | 0.55
Loss from discontinued operations (in dollars per share) | 0.00 | (0.15) | (0.03)
Net income (loss) per share - diluted (in dollars per share) | $ 0.94 | $ (0.05) | $ 0.52
Weighted average common shares outstanding (See Note 12): |  |  |
Basic (in shares) | 74,386 | 68,990 | 64,864
Diluted (in shares) | 79,194 | 71,354 | 65,920

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- Definition The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=68048583&loc=d3e3636-108311 + Details
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- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e1505-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- References No definition available. + Details
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- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e1448-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Weighted-Average Number of Common Shares Outstanding -URI http://asc.fasb.org/extlink&oid=6528421 + Details
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