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Equity (Details 1) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Income before income taxes $ 78,065 $ 67,074 $ 60,496
Net income attributable to Inter Parfums, Inc. $ 41,594 $ 33,331 $ 30,437
Diluted earnings per share attributable to Inter Parfums, Inc. $ 1.33 $ 1.07 $ 0.98
Operating Income (Loss) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Income before income taxes $ 2,100 $ 1,200 $ 800
Net income attributable to Inter Parfums, Inc. $ 1,150 $ 700 $ 500
Diluted earnings per share attributable to Inter Parfums, Inc. $ 0.04 $ 0.02 $ 0.01