Net Income Attributable to Inter Parfums, Inc. Common Shareholders (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Numerator:
Net income attributable to Inter Parfums, Inc.	$ 15,909	$ 13,373
Denominator:
Weighted average shares	31,267	31,145
Effect of dilutive securities: Stock options	162	109
Denominator for diluted earnings per share	31,429	31,254
Earnings per share:
Basic (in dollars per share)	$ 0.51	$ 0.43
Diluted (in dollars per share)	$ 0.51	$ 0.43