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Business Combination - Schedule of Pro Forma Financial Information (Details) - Residential Control Systems, Inc - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Business Combination |  |  |  |
Net sales | $ 175,652 | $ 170,658 | $ 515,200 | $ 497,172
Net income | 1,751 | 7,525 | 6,292 | 16,892
Net income attributable to Universal Electronics Inc. | $ 1,751 | $ 7,525 | $ 6,292 | $ 16,892
Basic earnings per share attributable to Universal Electronics Inc. (in dollars per share) | $ 0.12 | $ 0.52 | $ 0.44 | $ 1.17
Diluted earnings per share attributable to Universal Electronics Inc. (in dollars per share) | $ 0.12 | $ 0.51 | $ 0.43 | $ 1.14

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