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Net Income Attributable to Inter Parfums, Inc. Common Shareholders (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Numerator:
Net income attributable to Inter Parfums, Inc.	$ 10,899	$ 6,744	$ 26,808	$ 20,117
Denominator:
Weighted average shares	31,299	31,169	31,283	31,157
Effect of dilutive securities: Stock options	191	112	176	111
Denominator for diluted earnings per share	31,490	31,281	31,459	31,268
Earnings per share:
Basic (in dollars per share)	$ 0.35	$ 0.22	$ 0.86	$ 0.65
Diluted (in dollars per share)	$ 0.35	$ 0.22	$ 0.85	$ 0.64

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