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Business Combination - Pro Forma Financial Information (Details) - Residential Control Systems, Inc - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Business Combination
Net sales	$ 162,523	$ 177,580	$ 327,221	$ 339,548
Net income	$ 22,659	$ 4,767	$ 22,072	$ 4,541
Basic earnings per share attributable to Universal Electronics Inc. (in dollars per share)	$ 1.61	$ 0.33	$ 1.57	$ 0.31
Diluted earnings per share attributable to Universal Electronics Inc. (in dollars per share)	$ 1.60	$ 0.32	$ 1.55	$ 0.31

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