Acquisitions, Joint Ventures and Investments - Additional Information (Detail) ₨ in Millions						1 Months Ended																						3 Months Ended		6 Months Ended		12 Months Ended
		Jul. 06, 2015 USD ($)	Apr. 26, 2011 USD ($)	Jun. 03, 2010 USD ($)	Nov. 07, 2007 USD ($)	Mar. 31, 2015 USD ($)	Feb. 28, 2015 USD ($)	Dec. 31, 2014 USD ($)	Oct. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)	Jun. 30, 2014 USD ($)	Mar. 31, 2014 USD ($) Installment	Feb. 28, 2014 USD ($)	Jan. 31, 2014 USD ($)	Nov. 30, 2013 USD ($)	Oct. 31, 2013 USD ($) Installment	Sep. 30, 2013 USD ($)	Jul. 31, 2013 USD ($)	Jun. 30, 2013 USD ($)	Feb. 28, 2013 USD ($)	Jun. 30, 2012 USD ($)	May. 31, 2012 USD ($)	May. 31, 2011 USD ($)	Jul. 31, 2010 USD ($)	Jun. 30, 2010 USD ($)	May. 31, 2009 USD ($) shares	Sep. 30, 2008 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Jun. 30, 2013 INR (₨)	Dec. 31, 2009 USD ($)	Sep. 30, 2009 USD ($)	Mar. 31, 2009
Schedule of Investments [Line Items]
Cash payment for acquisition of assets																															$ 2,500,000
Goodwill								$ 231,738,000																				$ 238,187,000		$ 238,187,000		$ 231,738,000
Revenues																												$ 96,221,000	$ 112,109,000	$ 190,018,000	227,732,000
Percentage of interest sold in equity method investment																												50.00%		50.00%
Purchase price Percentage of Agreed value																120.00%
Payment made to subsidiary for diligence and Market analysis																														$ 3,100,000
Note receivable	[1]																											$ 5,767,000		5,767,000
Iconix Southeast Asia
Schedule of Investments [Line Items]
Percentage of interest sold in equity method investment																50.00%
Agreed price for sale of interest in a subsidiary											$ 15,900,000																		$ 15,900,000		$ 15,900,000
Payment received upon sale interest in subsidiary											4,000,000					$ 7,500,000
Receivable for investments sold																$ 4,500,000												21,900,000		21,900,000
Committed amount receivable period																24 months
Gain on sale of interest in subsidiary																																8,200,000	$ 2,700,000
Purchase price Percentage of Agreed value																120.00%
Price for sale of interest in a subsidiary																$ 12,000,000
Business acquisition, transaction costs																																	2,000,000
Marketing costs incurred											$ 5,400,000
Iconix Southeast Asia | Lee Cooper And Umbro Brands
Schedule of Investments [Line Items]
Agreed price for sale of interest in a subsidiary										$ 21,500,000
Payment received upon sale interest in subsidiary										$ 4,300,000
Gain on sale of interest in subsidiary																																$ 18,700,000
Guaranteed minimum distributions																												5,100,000		5,100,000
Iconix Israel
Schedule of Investments [Line Items]
Percentage of interest sold in equity method investment															50.00%
Payment received upon sale interest in subsidiary															$ 1,000,000
Receivable for investments sold															$ 2,300,000													1,200,000		1,200,000
Committed amount receivable period															36 months
Gain on sale of interest in subsidiary																																	2,300,000
Percentage of equity interest subject to call option															5.00%
Price for sale of interest in a subsidiary															$ 3,300,000
Iconix Australia
Schedule of Investments [Line Items]
Percentage of interest sold in equity method investment																	50.00%
Gain on sale of interest in subsidiary																																	5,100,000
Price for sale of interest in a subsidiary																	$ 7,200,000
Iconix Lifestyle India Private Limited
Schedule of Investments [Line Items]
Percentage of interest sold in equity method investment																			50.00%																50.00%
Receivable for investments sold																			$ 4,000,000
Net gain recognized on sale of interest in subsidiary																			5,600,000
Price for sale of interest in a subsidiary																			6,000,000
Note receivable																												1,900,000		$ 1,900,000
Administrative Manager [Member]
Schedule of Investments [Line Items]
Percentage of gross revenue paid monthly as services fee																														5.00%
Administrative Manager [Member] | Iconix Southeast Asia
Schedule of Investments [Line Items]
Percentage of gross revenue paid monthly as services fee																														5.00%
Local Manager [Member]
Schedule of Investments [Line Items]
Percentage of gross revenue paid monthly as services fee																														15.00%
Local Manager [Member] | Iconix Southeast Asia
Schedule of Investments [Line Items]
Percentage of gross revenue paid monthly as services fee																														15.00%
Two Year Call Option | Iconix Southeast Asia
Schedule of Investments [Line Items]
Call option period																6 months
Call option commencement date																Oct. 01, 2015
Two Year Call Option | Iconix Australia
Schedule of Investments [Line Items]
Call option period																	6 months
Call option commencement date																	Sep. 17, 2015
Five-Year Put/Call Options
Schedule of Investments [Line Items]
Put/Call option period																6 months
Put/Call option commencement date																Sep. 17, 2019
Five-Year Put/Call Options | Iconix Southeast Asia
Schedule of Investments [Line Items]
Put/Call option period																6 months
Put/Call option commencement date																Oct. 01, 2018
Five-Year Put/Call Options | Iconix Australia
Schedule of Investments [Line Items]
Put/Call option commencement date																	Sep. 17, 2017
Eight-Year Put/Call Options
Schedule of Investments [Line Items]
Put/Call option period																6 months
Put/Call option commencement date																Sep. 17, 2022
Eight-Year Put/Call Options | Iconix Southeast Asia
Schedule of Investments [Line Items]
Put/Call option period																6 months
Put/Call option commencement date																Oct. 01, 2021
Maximum | Two Year Call Option | Iconix Southeast Asia
Schedule of Investments [Line Items]
Percentage of equity interest subject to call option																5.00%
Maximum | Two Year Call Option | Iconix Australia
Schedule of Investments [Line Items]
Percentage of equity interest subject to call option																	5.00%
Minimum | Iconix Southeast Asia | Europe/Turkey
Schedule of Investments [Line Items]
Agreed Value																												7,600,000		$ 7,600,000
Minimum | Iconix Southeast Asia | Guarantee of Business Revenue
Schedule of Investments [Line Items]
Guaranteed minimum distributions																												2,500,000		2,500,000
Minimum | Five-Year Put/Call Options | Iconix Southeast Asia
Schedule of Investments [Line Items]
Agreed Value																												15,500,000		15,500,000
Other assets - current | Iconix Southeast Asia
Schedule of Investments [Line Items]
Receivable for investments sold																												9,300,000		9,300,000
Other assets - current | Iconix Israel
Schedule of Investments [Line Items]
Receivable for investments sold																												800,000		800,000
Other assets - current | Iconix Lifestyle India Private Limited
Schedule of Investments [Line Items]
Note receivable																												1,000,000		1,000,000
Other Assets | Iconix Southeast Asia
Schedule of Investments [Line Items]
Receivable for investments sold																												12,600,000		12,600,000
Other Assets | Iconix Israel
Schedule of Investments [Line Items]
Receivable for investments sold																												400,000		400,000
Other Assets | Iconix Lifestyle India Private Limited
Schedule of Investments [Line Items]
Note receivable																												900,000		900,000
Iconix China
Schedule of Investments [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired						50.00%
Business acquisition total purchase price						$ 57,400,000
Business acquisition purchase price, cash paid						40,400,000
Business acquisition purchase price, common stock issued, value						$ 15,700,000
Equity interest acquired						100.00%
Goodwill						$ 5,850,000
Selling, general and administrative expenses period increase																												600,000		600,000
Other income period increase																												600,000		$ 600,000
Business acquisition remaining amount owed to Purim included in other current liabilities						447,000
Strawberry Shortcake
Schedule of Investments [Line Items]
Business acquisition purchase price, cash paid						105,000,000
Goodwill						500,000
Note receivable						10,000,000
Quarterly installment period																														2 years
Revenues																												2,000,000		$ 3,400,000
Pony International, LLC.
Schedule of Investments [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired							75.00%
Business acquisition purchase price, cash paid							$ 37,000,000
Goodwill							$ 333,000																					300,000		300,000
Revenues																												$ 700,000		$ 1,100,000
Percentage of minority interest in subsidiary							25.00%
Billionaire Boys ClubTM/BBCTM and Ice CreamTM | Subsequent Event
Schedule of Investments [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired		50.00%
Artful Holdings LLC | Subsequent Event
Schedule of Investments [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired		100.00%
Equity method of accounting | Iconix Lifestyle India Private Limited
Schedule of Investments [Line Items]
Payment received upon sale interest in subsidiary																			$ 2,000,000
Committed amount receivable period																			48 months
Equity method of accounting | Iconix China
Schedule of Investments [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired																												50.00%		50.00%
Novel | Iconix China
Schedule of Investments [Line Items]
Offset of accounts receivable						$ 1,269,000
Novel | Equity method of accounting
Schedule of Investments [Line Items]
Committed contribution to joint venture																											$ 20,000,000										$ 9,000,000
Cash payment for acquisition of assets																					$ 2,000,000		$ 3,000,000	$ 4,000,000			8,000,000
Beagle Scout LLC | Peanuts Worldwide
Schedule of Investments [Line Items]
Cash payment for acquisition of assets				$ 34,000,000
Percentage of minority interest in subsidiary				20.00%
Notes loaned to subsidiary				$ 17,500,000
Notes receivable, annual interest rate				6.00%
Notes receivable, minimum principal annual installments				$ 2,200,000
Notes receivable, maturity date				Jun. 03, 2015
LF Centennial Limited | Iconix Southeast Asia
Schedule of Investments [Line Items]
Cost of brand strategy services																$ 500,000
Number of installments | Installment																4
Aggregate consulting costs																																	$ 2,000,000
Parent Company | Equity method of accounting
Schedule of Investments [Line Items]
Committed contribution to joint venture																											5,000,000
Cash payment for acquisition of assets																											$ 2,000,000
Additional amount agreed to be contributed as working capital																			$ 2,000,000																₨ 100
Candies Shanghai Fashion
Schedule of Investments [Line Items]
Equity interest acquired						100.00%
Equity interests aggregate fair value						$ 42,700,000
Iconix Latin America
Schedule of Investments [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired													50.00%
Business acquisition purchase price, cash paid													$ 42,000,000
Equity interest acquired													100.00%
Iconix Europe
Schedule of Investments [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired														1.00%
Equity interest acquired														51.00%
Percentage of interest sold in equity method investment																																				50.00%
Agreed price for sale of interest in a subsidiary																																				$ 4,000,000
Payment received upon sale interest in subsidiary														$ 1,500,000
Hydraulic IP Holdings
Schedule of Investments [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired								51.00%																								51.00%
Business acquisition purchase price, cash paid								$ 6,000,000
Hydraulic IP Holdings | Top On International Group, LLC
Schedule of Investments [Line Items]
Percentage of minority interest in subsidiary								49.00%																								49.00%
NGX LLC
Schedule of Investments [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired									51.00%
Business acquisition purchase price, cash paid									$ 6,000,000
NGX LLC | NGO LLC
Schedule of Investments [Line Items]
Percentage of minority interest in subsidiary									49.00%
Alberta ULC
Schedule of Investments [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired																				51.00%
Business acquisition purchase price, cash paid																				$ 76,500,000
Buffalo Brand
Schedule of Investments [Line Items]
Percentage of minority interest in subsidiary																				49.00%
Modern Amusement | Equity method of accounting
Schedule of Investments [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired																																		51.00%
Business acquisition purchase price, cash paid																																		$ 5,000,000
Icon Entertainment LLC | Peanuts Worldwide
Schedule of Investments [Line Items]
Cash payment for acquisition of assets				$ 141,000,000
Business Acquisition, Percentage of Voting Interests Acquired				80.00%
Business acquisition purchase price, cash paid				$ 172,100,000
Hardy Way
Schedule of Investments [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired			85.00%
Business acquisition total purchase price			$ 62,000,000
Hardy Way | Equity method of accounting
Schedule of Investments [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired																										50.00%
Business acquisition total purchase price																										$ 17,000,000
Business acquisition purchase price, cash paid																										9,000,000
Business acquisition purchase price, common stock issued, value																										$ 8,000,000
Business acquisition purchase price, common stock issued, shares | shares																										588,688
Business acquisition additional common stock issued, value																										$ 1,000,000
Scion
Schedule of Investments [Line Items]
Decrease in restricted cash								$ 8,500,000
Allowance for doubtful accounts receivable								2,700,000																								$ 2,700,000
Decrease in accounts receivable								$ 5,800,000																								$ 5,800,000
Scion | Subsequent Event
Schedule of Investments [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired		50.00%
Business acquisition purchase price, cash paid		$ 6,000,000
Equity interest acquired		100.00%
Scion | Artful Dodger
Schedule of Investments [Line Items]
Business acquisition purchase price, cash paid					$ 15,000,000
Scion | Cost method of accounting | Variable Interest Entity, Not Primary Beneficiary
Schedule of Investments [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired																																						16.60%
Cash collateral released and distributed to the Scion members																									$ 3,300,000
Cash collateral deposited under the terms of the entity's financing agreements														$ 11,800,000
Scion | Cost method of accounting | Variable Interest Entity, Not Primary Beneficiary | Subsequent Event
Schedule of Investments [Line Items]
Percentage of interest sold in equity method investment		16.60%
Scion BBC LLC | Billionaire Boys ClubTM/BBCTM and Ice CreamTM
Schedule of Investments [Line Items]
Business acquisition purchase price, cash paid																						$ 3,500,000
Equity interest acquired																						50.00%
Iconix Middle East
Schedule of Investments [Line Items]
Percentage of interest sold in equity method investment								50.00%																								50.00%
Agreed price for sale of interest in a subsidiary								$ 18,800,000																								$ 18,800,000
Payment received upon sale interest in subsidiary								6,300,000
Receivable for investments sold								$ 12,500,000																				$ 12,200,000		$ 12,200,000		12,500,000
Committed amount receivable period								24 months
Gain on sale of interest in subsidiary																																$ 10,300,000
Purchase price Percentage of Agreed value																												120.00%		120.00%
Iconix Middle East | Two Year Call Option
Schedule of Investments [Line Items]
Call option period								6 months
Call option commencement date								Dec. 19, 2016
Payment for the purchased call option								$ 1,800,000
Iconix Middle East | Five-Year Put/Call Options
Schedule of Investments [Line Items]
Put/Call option period																														6 months
Put/Call option commencement date																														Dec. 19, 2019
Iconix Middle East | Eight-Year Put/Call Options
Schedule of Investments [Line Items]
Put/Call option period																														6 months
Put/Call option commencement date																														Dec. 19, 2022
Iconix Middle East | Maximum | Two Year Call Option
Schedule of Investments [Line Items]
Percentage of equity interest subject to call option								5.00%
Iconix Middle East | Minimum | Five-Year Put/Call Options
Schedule of Investments [Line Items]
Royalty revenue																														$ 12,000,000
Iconix Middle East | Minimum | Eight-Year Put/Call Options
Schedule of Investments [Line Items]
Royalty revenue																														12,000,000
Iconix Middle East | Other assets - current
Schedule of Investments [Line Items]
Receivable for investments sold																												$ 6,300,000		6,300,000
Iconix Middle East | Other Assets
Schedule of Investments [Line Items]
Receivable for investments sold																												5,900,000		5,900,000
LC Partners U.S. LLC
Schedule of Investments [Line Items]
Percentage of interest sold in equity method investment												50.00%
Agreed price for sale of interest in a subsidiary												$ 4,000,000
Payment received upon sale interest in subsidiary												800,000
Receivable for investments sold												$ 3,200,000																2,400,000		2,400,000
Number of equal annual installments | Installment												4
Net gain recognized on sale of interest in subsidiary																														4,000,000
LC Partners U.S. LLC | Other assets - current
Schedule of Investments [Line Items]
Receivable for investments sold																												800,000		800,000
LC Partners U.S. LLC | Other Assets
Schedule of Investments [Line Items]
Receivable for investments sold																												1,600,000		1,600,000
Iconix Canada
Schedule of Investments [Line Items]
Percentage of interest sold in equity method investment																			50.00%																50.00%
Agreed price for sale of interest in a subsidiary																			$ 17,800,000
Payment received upon sale interest in subsidiary																			8,900,000
Receivable for investments sold																			$ 8,900,000									5,700,000		5,700,000
Committed amount receivable period																			5 years
Net gain recognized on sale of interest in subsidiary																			$ 9,800,000
Obligation to pay liquidated damages																			4,900,000
Iconix Canada | Guarantee of Business Revenue
Schedule of Investments [Line Items]
Royalty revenue																			2,700,000
Iconix Canada | Other assets - current
Schedule of Investments [Line Items]
Receivable for investments sold																												2,900,000		2,900,000
Iconix Canada | Other Assets
Schedule of Investments [Line Items]
Receivable for investments sold																												2,800,000		2,800,000
Reliance Brands Limited | Equity method of accounting
Schedule of Investments [Line Items]
Additional amount agreed to be contributed as working capital																			$ 500,000																₨ 25
MG Icon | Equity method of accounting
Schedule of Investments [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired																			50.00%																50.00%
Business acquisition total purchase price																			$ 20,000,000
Acquisition of interest in MG Icon																			$ 4,000,000											21,000,000
Additional cash received by seller																												3,000,000		3,000,000
Business acquisition remaining amount owed to Purim included in other current liabilities																												$ 2,000,000		2,000,000
MG Icon | Equity method of accounting | Minimum
Schedule of Investments [Line Items]
Preferred profit distribution to the Company																														$ 23,000,000
Marcy Media Holdings
Schedule of Investments [Line Items]
Cash payment for acquisition of assets																		$ 32,000,000
Percentage of minority interest in subsidiary																		5.00%
Complex Media Inc.
Schedule of Investments [Line Items]
Cash payment for acquisition of assets																	$ 25,000,000
Percentage of minority interest in subsidiary																	14.40%

[1] The Note receivable in connection with Strawberry Shortcake acquisition represents amounts due from AG in respect of non-compete payments pursuant to a License Agreement entered into with AG simultaneously with the closing of the transaction.