Net Income Attributable to Inter Parfums, Inc. Common Shareholders (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Numerator:
Net income attributable to Inter Parfums, Inc.	$ 18,894	$ 15,909
Denominator:
Weighted average shares	31,431	31,267
Effect of dilutive securities: Stock options	248	162
Denominator for diluted earnings per share	31,679	31,429
Earnings per share:
Basic (in dollars per share)	$ 0.6	$ 0.51
Diluted (in dollars per share)	$ 0.6	$ 0.51