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Condensed Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Income Statement [Abstract] |  |  |  |
Net sales | $ 230.8 | $ 234.6 | $ 452.4 | $ 434.8
Cost of sales | 165.1 | 175.7 | 327.5 | 329.1
Gross profit | 65.7 | 58.9 | 124.9 | 105.7
Selling, engineering, general and administrative expenses | 36.1 | 34.9 | 70.5 | 69.1
Restructuring | 0.4 | 0.1 | 0.4 | (0.1)
Operating income | 29.2 | 23.9 | 54.0 | 36.7
Interest expense | 0.6 | 0.9 | 1.2 | 1.9
Other expense, net | 0.1 | 0.3 | 1.0 | 0.3
Income before income taxes | 28.5 | 22.7 | 51.8 | 34.5
Income tax expense | (10.2) | (5.7) | (18.6) | (9.9)
Income from continuing operations | 18.3 | 17.0 | 33.2 | 24.6
Gain (loss) from discontinued operations and disposal, net of tax | 0.0 | 0.1 | 0.0 | (0.1)
Net income | $ 18.3 | $ 17.1 | $ 33.2 | $ 24.5
Basic earnings per share: |  |  |  |
Earnings from continuing operations (usd per share) | $ 0.29 | $ 0.27 | $ 0.53 | $ 0.39
Gain (loss) from discontinued operations and disposal, net of tax (usd per share) | 0.00 | 0.00 | 0.00 | 0.00
Net earnings per share (usd per share) | 0.29 | 0.27 | 0.53 | 0.39
Diluted earnings per share: |  |  |  |
Earnings from continuing operations (usd per share) | 0.29 | 0.27 | 0.52 | 0.39
Gain (loss) from discontinued operations and disposal, net of tax (usd per share) | 0.00 | 0.00 | 0.00 | 0.00
Net earnings per share (usd per share) | $ 0.29 | $ 0.27 | $ 0.52 | $ 0.39
Weighted average common shares outstanding: |  |  |  |
Basic (shares) | 62.6 | 62.8 | 62.5 | 62.8
Diluted (shares) | 63.6 | 63.8 | 63.5 | 63.8
Cash dividends declared per common share (usd per share) | $ 0.06 | $ 0.03 | $ 0.12 | $ 0.03

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- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to 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=56944662&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 + Details
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