Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement [Abstract]
Net sales	$ 675,574	$ 591,251	$ 521,072
Cost of sales	248,012	214,965	194,601
Gross margin	427,562	376,286	326,471
Selling, general, and administrative expenses	332,831	295,540	258,787
Gain on buyout of license			(4,652)
Impairment loss		2,123	5,658
Income from operations	94,731	78,623	66,678
Other expenses (income):
Interest expense	2,578	1,992	2,340
Loss on foreign currency	251	1,549	595
Interest income	(3,957)	(2,983)	(3,331)
Other expenses (income)	(1,128)	558	(396)
Income before income taxes	95,859	78,065	67,074
Income taxes	26,144	22,812	23,826
Net income	69,715	55,253	43,248
Less: Net income attributable to the noncontrolling interest	15,922	13,659	9,917
Net income attributable to Inter Parfums, Inc.	$ 53,793	$ 41,594	$ 33,331
Net income attributable to Inter Parfums, Inc. common shareholders:
Basic (in dollars per share)	$ 1.72	$ 1.33	$ 1.07
Diluted (in dollars per share)	$ 1.71	$ 1.33	$ 1.07
Weighted average number of shares outstanding:
Basic (in shares)	31,307,991	31,172,285	31,072,328
Diluted (in shares)	31,522,371	31,305,101	31,175,598
Dividends declared per share (in dollars per share)	$ 0.91	$ 0.72	$ 0.62