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CONDENSED CONSOLIDATED STATEMENT OF INCOME (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013
Income Statement [Abstract] |  |  |  |
Net sales | $ 153,495 | $ 132,452 | $ 300,135 | $ 258,432
Cost of sales | 96,357 | 88,023 | 189,078 | 172,713
Gross margin | 57,138 | 44,429 | 111,057 | 85,719
Selling and administrative expenses | 34,499 | 25,547 | 62,097 | 50,753
Research and development expenses | 6,420 | 6,250 | 11,283 | 11,519
Restructuring and impairment charges |  | 4,525 | 0 | 4,525
Operating income | 16,219 | 8,107 | 37,677 | 18,922
Equity income in unconsolidated joint ventures | 1,062 | 762 | 2,039 | 1,291
Other income (expense), net | (76) | (177) | (1,268) | (766)
Interest income (expense), net | (720) | (830) | (1,468) | (1,735)
Income before income tax expense | 16,485 | 7,862 | 36,980 | 17,712
Income tax expense | 5,583 | 2,279 | 11,498 | 5,152
Income from continuing operations | 10,902 | 5,583 | 25,482 | 12,560
Income (loss) from discontinued operations, net of income taxes | 0 | (18) | 0 | 102
Net income | $ 10,902 | $ 5,565 | $ 25,482 | $ 12,662
Basic net income per share: |  |  |  |
Income from continuing operations (in dollars per share) | $ 0.60 | $ 0.33 | $ 1.41 | $ 0.73
Income from discontinued operations (in dollars per share) |  | $ 0.00 | $ 0.00 | $ 0.01
Net income (loss) (in dollars per share) | $ 0.60 | $ 0.33 | $ 1.41 | $ 0.74
Diluted net income per share: |  |  |  |
Income from continuing operations (in dollars per share) | $ 0.58 | $ 0.32 | $ 1.37 | $ 0.71
Income from discontinued operations (in dollars per share) |  | $ 0.00 | $ 0.00 | $ 0.01
Net income (in dollars per share) | $ 0.58 | $ 0.32 | $ 1.37 | $ 0.72
Shares used in computing: |  |  |  |
Basic net income per share (shares) | 18,158,244 | 17,107,727 | 18,054,543 | 17,090,093
Diluted net income per share (shares) | 18,688,538 | 17,599,481 | 18,618,998 | 17,636,440

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- Definition The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 730 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373 + Details
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- Definition Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan and expenses resulting from the write-down of assets. Excludes expenses related to a business combination, a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + 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 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + 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 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 16 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1505-109256 + 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=7655603&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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