Represents the percentage of increase in annual dividend.

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The amount of shares purchased on the open market during the period for issuance to employees under the plan.

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Number of shares tendered for the exercise of stock options.

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Aggregate dividends declared during the period for each share of common stock outstanding.

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Date the declared dividend will be paid, in CCYY-MM-DD format.

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The per share amount of a dividend declared, but not paid, as of the financial reporting date.

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Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding.

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Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format.

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No definition available.

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Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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The number of shares purchased on the open market during the period for issuance to employees under the plan.

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Amount of capitalized and expensed compensation cost from equity-based compensation arrangements.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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For net-share settlement of share-based awards when the employer settles employees' income tax withholding obligations, this element represents the number of shares the employees use to repay the employer.

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No definition available.

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Number of share options (or share units) exercised during the current period.

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Equity (Details Narrative) $ / shares in Units, $ in Thousands	1 Months Ended					3 Months Ended	12 Months Ended
	Dec. 31, 2018 USD ($) $ / shares shares	Dec. 31, 2018 USD ($) $ / shares € / shares shares	Oct. 31, 2018 USD ($) $ / shares	Sep. 30, 2016 USD ($) $ / shares shares	Sep. 30, 2016 € / shares shares	Mar. 31, 2019	Dec. 31, 2018 USD ($) $ / shares shares	Dec. 31, 2017 USD ($) $ / shares shares	Dec. 31, 2016 USD ($) $ / shares shares	Mar. 29, 2019 $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value \| $ / shares							$ 14.31
Shares issued upon exercise of stock options, shares \| shares							140,579	103,230	123,150
Exercises, aggregate exercise prices							$ 4,310	$ 2,258	$ 1,860
Dividends Payable			$ 8,600
Dividends Payable, Amount Per Share \| $ / shares	$ 0.275	$ 0.275	$ 1.10				$ 0.275
Percentage of Increase in Annual Dividend			31.00%
Common Stock, Dividends, Per Share, Declared \| $ / shares			$ 1.10				$ 0.91	$ 0.72	$ 0.62
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost							$ 1,100
Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividends Payable, Amount Per Share \| $ / shares										$ 0.275
Dividends Payable, Date to be Paid						Apr. 15, 2019
Dividends Payable, Date of Record						Mar. 29, 2019
Interparfums SA Subsidiary [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value \| $ / shares	$ 34.00			$ 22.00
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized \| shares	142,842	142,842		157,840	157,840		142,842
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost	$ 4,900			$ 3,400
Share based Compensation Arrangement by Share based Payment Award Value Shares Purchased for Award							$ 800		$ 2,900
Share-based Compensation Arrangement by Share-based Payment Award, Shares Purchased for Award \| shares							18,899		131,101
Interparfums SA Subsidiary [Member] \| Euro [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value \| € / shares		$ 29.84			€ 18.56
Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued upon exercise of stock options, shares \| shares									19,000
Exercises, aggregate exercise prices									$ 700
Shares Paid For Stock Options Exercised \| shares									20,658
Shares tendered for tax withholding \| shares									2,179
Employees [Member] \| Interparfums SA Subsidiary [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized \| shares	26,600	26,600		15,100	15,100		26,600
Officers And Managers [Member] \| Interparfums SA Subsidiary [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized \| shares	133,000	133,000		133,000	133,000		133,000
Equity Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of shares vested							$ 1,100	$ 900
Number of shares available for grant \| shares	744,215	744,215					744,215
Aggregate intrinsic value of options outstanding	$ 18,800	$ 18,800					$ 18,800
Unrecognized compensation cost related to stock options	$ 4,900	$ 4,900					$ 4,900
Term							6 years
Unrecognized compensation cost, recognition period							5 years
Weighted average grant date fair value \| $ / shares							$ 14.31	$ 9.82	$ 7.43
Options exercisable, weighted average exercise price \| $ / shares	$ 31.65	$ 31.65					$ 31.65
Weighted average remaining contractual life of options outstanding, options exercisable							2 years 6 months 25 days
Aggregate intrinsic value of exercisable options	$ 9,900	$ 9,900					$ 9,900
Equity Option [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period								4 years
Equity Option [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period								5 years