Segments and Geographic Areas (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Segment Reporting Information [Line Items]
Net sales	$ 177,213	$ 169,531	$ 498,347	$ 441,725
Net income attributable to Inter Parfums, Inc.	18,938	17,077	45,746	37,194
Total assets	783,153		783,153		$ 777,772
United States [Member]
Segment Reporting Information [Line Items]
Net sales	40,189	35,690	97,841	81,977
Net income attributable to Inter Parfums, Inc.	4,686	3,668	7,164	5,134
Total assets	136,097		136,097		92,909
Europe [Member]
Segment Reporting Information [Line Items]
Net sales	137,800	134,639	402,952	361,172
Net income attributable to Inter Parfums, Inc.	14,252	13,409	38,582	32,060
Total assets	668,347		668,347		694,385
Eliminations [Member]
Segment Reporting Information [Line Items]
Net sales	(776)	$ (798)	(2,446)	$ 1,424
Total assets	$ (21,291)		$ (21,291)		$ (9,522)