Document and Entity Information - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Feb. 25, 2019	Jun. 30, 2018
Document And Entity Information [Abstract]
Entity Registrant Name	INTER PARFUMS INC
Entity Central Index Key	0000822663
Document Type	10-K
Trading Symbol	IPAR
Document Period End Date	Dec. 31, 2018
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Small Business	false
Entity Emerging Growth Company	false
Entity a Well-known Seasoned Issuer	No
Entity a Voluntary Filer	No
Entity's Reporting Status Current	Yes
Entity Shell Company	false
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$ 927,581,556
Entity Common Stock, Shares Outstanding		31,442,338
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2018