Performance-Based Common Stock Warrants - Assumptions Used in Valuation and Weighted Average Fair Value of Warrants (Details) - Common Stock Purchase Warrants - $ / shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Class of Warrant or Right [Line Items]
Fair value (in dollars per share)	$ 16.88	$ 32.32
Price of Universal Electronics Inc. common stock (in dollars per share)	$ 52.425	$ 67.98
Risk-free interest rate	2.54%	2.04%
Expected volatility	34.53%	39.86%
Expected life	4 years 9 months	5 years 9 months