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Derivative Financial Instruments (Details) (Foreign currency forward exchange contracts [Member]) In Millions, except Per Share data, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015 USD ($) | Mar. 31, 2015 GBP (£) | Mar. 31, 2015 JPY (¥) | Mar. 31, 2015 Rochas brand [Member] USD ($)
Derivative Financial Instruments [Line Items] |  |  |  |
Purchase price |  |  |  | $ 108 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = ipar_RochasBrandMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember
Notional amount | $ 126.7 invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember | £ 2.2 invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember | ¥ 220.7 invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember | $ 108.0 invest_DerivativeNotionalAmount / us-gaap_BusinessAcquisitionAxis = ipar_RochasBrandMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember
Exchange rate (in dollars per share) |  |  |  | $ 1.067 ipar_DerivativeForwardExchangePricePerShare / us-gaap_BusinessAcquisitionAxis = ipar_RochasBrandMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember
Maximum maturity period | 1 year | 1 year | 1 year |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
Name: | invest_DerivativeNotionalAmount
Namespace Prefix: | invest_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

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- Definition Average contractual share price at which a foreign currency can be purchased or sold. + References No definition available. + Details
Name: | ipar_DerivativeForwardExchangePricePerShare
Namespace Prefix: | ipar_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
Name: | us-gaap_BusinessCombinationConsiderationTransferred1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition High end period remaining until maturity for the derivative contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_DerivativeHigherRemainingMaturityRange1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration