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Trademarks, Licenses and Other Intangible Assets (Narrative) (Details)
In Millions, unless otherwise specified
 12 Months Ended 12 Months Ended
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Dec. 31, 2012
USD ($)
Dec. 31, 2014
Lanvin [Member]
USD ($)
Dec. 31, 2014
Lanvin [Member]
EUR (€)
Dec. 31, 2014
Minimum [Member]
Dec. 31, 2014
Maximum [Member]
Dec. 31, 2014
Trademarks [Member]
Dec. 31, 2014
Licenses [Member]
Dec. 31, 2014
Other Intangible Assets [Member]
Trademarks, Licenses and Other Intangible Assets [Abstract]                    
Amortization expense $ 6.6us-gaap_AmortizationOfIntangibleAssets $ 6.2us-gaap_AmortizationOfIntangibleAssets $ 7.0us-gaap_AmortizationOfIntangibleAssets              
Weighted average cost of capital 6.70%us-gaap_FairValueInputsDiscountRate                  
Future amortization expense:                    
2015 6.2us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths                  
2016 6.2us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo                  
2017 5.4us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree                  
2018 5.4us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour                  
2019 5.4us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive                  
Finite-Lived Intangible Assets [Line Items]                    
Amortization period 15 years         3 years 20 years 18 years 14 years 2 years
Licensing Agreements [Line Items]                    
Repurchase price       $ 85ipar_LicensingAgreementsRepurchasePrice
/ ipar_LicensingAgreementsAxis
= ipar_LanvinMember		 € 70ipar_LicensingAgreementsRepurchasePrice
/ ipar_LicensingAgreementsAxis
= ipar_LanvinMember