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Acquisitions (Tables) | 12 Months Ended
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Dec. 31, 2020
Business Acquisition [Line Items] |
Pro Forma Financial Information (Unaudited) |
(In millions, except per share amounts) |  | 2019 | 2018
Net sales |  | $ | 1,410 |  | $ | 1,380 |
Net Income |  | 131 |  | 124 |
Basic earnings per share |  | 3.40 |  | 3.24 |
Diluted earnings per share |  | 3.35 |  | 3.19 |
Sierra Monitor Corporation |
Business Acquisition [Line Items] |
Schedule of Preliminary Fair Values of the Assets Acquired and Liabilities Assumed | The following table summarizes the fair values of the SMC assets acquired and liabilities assumed at the date of acquisition:
(In millions) | May 20, 2019
Current assets (including cash of $2.1 million) | $ | 10.5 |
Property, plant and equipment and other noncurrent assets | 1.3 |
Customer relationships | 9.6 |
Acquired technology | 1.4 |
Goodwill | 19.9 |
Total assets acquired | 42.7 |
Total liabilities assumed | 6.5 |
Net assets acquired | $ | 36.2 |

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- Definition Tabular disclosure of pro forma results of operations for a material business acquisition or series of individually immaterial business acquisitions that are material in the aggregate. + 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)(2) -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)(3) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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