Acquisitions, Investments and Joint Ventures - Additional Information (Detail)	3 Months Ended		6 Months Ended		12 Months Ended		6 Months Ended		1 Months Ended						6 Months Ended		6 Months Ended				1 Months Ended				6 Months Ended		1 Months Ended	6 Months Ended							6 Months Ended		1 Months Ended	6 Months Ended			1 Months Ended	6 Months Ended		1 Months Ended			6 Months Ended		1 Months Ended				1 Months Ended					1 Months Ended					1 Months Ended					1 Months Ended	12 Months Ended	1 Months Ended							1 Months Ended				12 Months Ended		1 Months Ended				1 Months Ended			6 Months Ended						1 Months Ended
	Jun. 30, 2013 USD ($)	Jun. 30, 2012 USD ($)	Jun. 30, 2013 USD ($)	Jun. 30, 2012 USD ($)	Dec. 31, 2010 USD ($)	Dec. 31, 2012 USD ($)	Jun. 30, 2013 Licensing agreements Minimum	Jun. 30, 2013 Licensing agreements Maximum	Nov. 30, 2012 Umbro Limited USD ($)	Apr. 26, 2011 Hardy Way USD ($)	Dec. 23, 2011 Hardy Way Nervous Tattoo, Inc. USD ($)	May 31, 2009 Hardy Way Equity method of accounting USD ($)	Jul. 27, 2011 Zoo York brand USD ($)	Mar. 31, 2010 MG Icon Equity method of accounting USD ($)	Jun. 30, 2013 MG Icon Equity method of accounting USD ($)	Mar. 31, 2012 MG Icon Equity method of accounting USD ($)	Jun. 30, 2013 MG Icon Equity method of accounting Minimum USD ($)	Mar. 31, 2012 MG Icon Equity method of accounting Period 1 USD ($)	Mar. 31, 2012 MG Icon Equity method of accounting Period 2 USD ($)	Jun. 03, 2010 Peanuts Worldwide USD ($)	Jun. 03, 2010 Peanuts Worldwide Licensing agreements Minimum	Jun. 03, 2010 Peanuts Worldwide Licensing agreements Maximum	Feb. 20, 2013 Lee Cooper USD ($)	Jun. 30, 2013 Lee Cooper USD ($)	Jun. 30, 2013 Lee Cooper Licensing agreements Minimum	Jun. 30, 2013 Lee Cooper Licensing agreements Maximum	Feb. 01, 2013 Alberta ULC USD ($)	Jun. 30, 2013 Alberta ULC USD ($)	Jun. 30, 2012 Alberta ULC USD ($)	Jun. 30, 2013 Alberta ULC Current Asset USD ($)	Jun. 30, 2013 Alberta ULC Noncurrent Assets USD ($)	Jun. 30, 2013 Alberta ULC Current Liabilities USD ($)	Jun. 30, 2013 Alberta ULC Liabilities, Total USD ($)	Jun. 30, 2013 Umbro USD ($)	Jun. 30, 2013 Umbro Licensing agreements Minimum	Jun. 30, 2013 Umbro Licensing agreements Maximum	May 31, 2012 Iconix Lifestyle India Equity method of accounting USD ($)	Jun. 30, 2013 Iconix Lifestyle India Equity method of accounting USD ($)	Jun. 30, 2013 Iconix Lifestyle India Equity method of accounting Other assets - current USD ($)	Jun. 30, 2013 Iconix Lifestyle India Equity method of accounting Other Assets USD ($)	Sep. 30, 2008 Parent Company Equity method of accounting USD ($)	Jun. 30, 2013 Parent Company Equity method of accounting USD ($)	Jun. 30, 2013 Parent Company Equity method of accounting INR	Jan. 31, 2013 Parent Company Cost method of accounting Variable Interest Entity, Not Primary Beneficiary USD ($)	Jan. 31, 2012 Parent Company Cost method of accounting Variable Interest Entity, Not Primary Beneficiary USD ($)	Mar. 31, 2009 Parent Company Cost method of accounting Variable Interest Entity, Not Primary Beneficiary USD ($)	Jun. 30, 2013 Reliance Brands Limited Equity method of accounting USD ($)	Jun. 30, 2013 Reliance Brands Limited Equity method of accounting INR	Dec. 27, 2012 Modern Amusement Equity method of accounting USD ($)	Dec. 27, 2012 Icon MA	Jun. 30, 2013 Scion Cost method of accounting USD ($)	Dec. 31, 2012 Scion Cost method of accounting USD ($)	Jun. 30, 2010 Scion Cost method of accounting Variable Interest Entity, Not Primary Beneficiary USD ($)	Mar. 31, 2009 Scion Cost method of accounting Variable Interest Entity, Not Primary Beneficiary USD ($)	Jun. 30, 2013 Scion Cost method of accounting Variable Interest Entity, Not Primary Beneficiary USD ($)	Jan. 31, 2012 Scion Cost method of accounting Variable Interest Entity, Not Primary Beneficiary USD ($)	Dec. 31, 2011 Scion Cost method of accounting Variable Interest Entity, Not Primary Beneficiary USD ($)	Nov. 07, 2007 Scion Artful Dodger USD ($)	Jan. 31, 2012 Scion Partner Cost method of accounting Variable Interest Entity, Not Primary Beneficiary USD ($)	Mar. 31, 2009 Scion Partner Cost method of accounting Variable Interest Entity, Not Primary Beneficiary USD ($)	May 31, 2012 Scion BBC LLC Billionaire Boys ClubTM/BBCTM and Ice CreamTM USD ($)	Mar. 31, 2012 Scion BBC LLC Billionaire Boys ClubTM/BBCTM and Ice CreamTM USD ($)	Jun. 30, 2012 Novel Equity method of accounting USD ($)	May 31, 2011 Novel Equity method of accounting USD ($)	Jul. 31, 2010 Novel Equity method of accounting USD ($)	Sep. 30, 2008 Novel Equity method of accounting USD ($)	Sep. 30, 2009 Novel Equity method of accounting USD ($)	Dec. 31, 2011 Iconix China USD ($)	Dec. 31, 2012 Iconix China USD ($)	Dec. 29, 2008 Iconix Latin America Equity method of accounting USD ($)	May 30, 2013 IPH Unltd USD ($)	May 17, 2013 IPH Unltd USD ($)	Oct. 31, 2009 IPH Unltd USD ($)	May 17, 2013 IPH Unltd Minimum	May 17, 2013 IPH Unltd Maximum	Oct. 31, 2009 IPH Unltd Ecko Assets USD ($)	Oct. 31, 2009 IPH Unltd Ecko Assets Licensing agreements Minimum	Oct. 31, 2009 IPH Unltd Ecko Assets Licensing agreements Maximum	Jan. 31, 2011 Iconix Europe Equity method of accounting USD ($)	Dec. 31, 2009 Iconix Europe Equity method of accounting USD ($)	Dec. 31, 2009 Iconix Europe Equity method of accounting USD ($)	Dec. 31, 2009 Iconix Europe Equity method of accounting Minimum USD ($)	Jun. 03, 2010 Icon Entertainment LLC Peanuts Worldwide USD ($)	Jun. 03, 2010 Beagle Scout LLC Peanuts Worldwide USD ($)	Jun. 30, 2013 Beagle Scout LLC Peanuts Worldwide Other assets - current USD ($)	Jun. 30, 2013 Beagle Scout LLC Peanuts Worldwide Other assets USD ($)	Jun. 30, 2013 Buffalo Brand	Jun. 30, 2013 Buffalo Brand Alberta ULC USD ($)	Feb. 01, 2013 Buffalo Brand Alberta ULC	Jun. 30, 2013 Buffalo Brand Alberta ULC Licensing agreements Minimum	Jun. 30, 2013 Buffalo Brand Alberta ULC Licensing agreements Maximum	Jun. 30, 2013 Latin America Territory USD ($)	Dec. 31, 2011 Latin America Territory USD ($)	Jun. 30, 2013 Latin America Territory Other assets - current USD ($)	Jun. 30, 2013 Latin America Territory Other assets USD ($)	Jun. 30, 2013 Iconix Canada Holdings Equity method of accounting USD ($)	Jun. 30, 2013 Iconix Canada Holdings Equity method of accounting Other assets - current USD ($)	Jun. 30, 2013 Iconix Canada Holdings Equity method of accounting Other Assets USD ($)
Schedule of Investments [Line Items]
Business acquisition purchase price, cash paid									$ 225,000,000			$ 9,000,000	$ 18,000,000										$ 72,700,000				$ 76,500,000																						$ 5,000,000									$ 15,000,000			$ 3,500,000																						$ 172,100,000
Goodwill deductible for income tax										18,800,000										17,700,000				1,100,000										2,300,000																																										700,000												4,100,000
Amortization contractual period of licensing contracts							1 year	9 years													1 year	5 years			1 year	9 years									1 year	9 years																																									1 year	9 years												1 year	5 years
Controlling interest										85.00%		50.00%	100.00%	50.00%													51.00%																						51.00%					16.60%							50.00%										51.00%			51.00%	100.00%								80.00%
Percentage of minority interest in subsidiary																																																		49.00%																						49.00%	49.00%											20.00%					49.00%
Net income attributable to non controlling interest	3,299,000	3,388,000	8,384,000	6,668,000																								2,100,000	3,900,000
Impact of consolidating joint venture on condensed consolidated balance sheet																														10,500,000	149,700,000	900,000	900,000
Percentage of interest sold in equity method investment																																					50.00%																																	50.00%										50.00%	50.00%															50.00%
Agreed price for sale of interest in a subsidiary																																																																						6,000,000										4,000,000	4,000,000												5,700,000			17,700,000
Payment received upon sale interest in subsidiary																																					2,000,000																																	1,000,000									1,000,000	3,000,000																8,800,000
Receivable for investments sold																																					4,000,000	4,000,000	1,000,000	3,000,000																														5,000,000																						2,600,000		1,800,000	800,000	8,800,000	2,900,000	5,900,000
Committed amount receivable period																																					48 months																																	30 months																										3 years
Net gain recognized on sale of interest in subsidiary	5,400,000				0																																	5,600,000																														12,700,000	7,400,000																											9,800,000
Percentage of limited partnership interest subject to call option																																																																																							5.00%
Amount released from escrow account									6,800,000
Price for sale of interest in a subsidiary																																					6,000,000
Additional amount agreed to be contributed as working capital																																										2,000,000	100,000,000				2,000,000	100,000,000
Amount contributed as working capital at closing																																										500,000	25,000,000				500,000	25,000,000
Consideration paid to acquire interest in licensees																																																						1
Cash payment for acquisition of assets			37,000	3,771,000						55,000,000																															2,000,000			2,600,000	1,100,000	2,100,000													1,100,000	2,100,000			2,000,000	3,000,000	4,000,000	8,000,000						45,000,000	63,500,000										141,000,000	34,000,000
Cash collateral deposited under the terms of the entity's financing agreements																																																						4,100,000		2,200,000
Cash collateral released and distributed to the Scion members																																																					3,300,000
Remaining cash collateral, restricted cash	47,768,000	23,574,000	47,768,000	23,574,000		16,362,000																																																	5,600,000		800,000
Committed contribution to joint venture																																									5,000,000																					6,500,000				20,000,000	9,000,000
Consolidated assets that are collateral for variable interest entity's obligations																																																			10,000,000	10,600,000
Payment received upon sale of interest in subsidiary																																																																					8,000,000
Investment with a cost basis																																																																				2,600,000	600,000
Equity earnings on joint ventures	2,264,000	1,460,000	4,200,000	2,758,000																																																																6,400,000	3,700,000
Joint venture ownership interest																																																																				50.00%	50.00%
Fair value of investment with a cost basis																																																																				15,300,000
Period for revenue recognition																																																																																												3 years
Business acquisition total purchase price										62,000,000		17,000,000		20,000,000
Business acquisition purchase price, common stock issued, shares												588,688
Business acquisition purchase price, common stock issued, value												8,000,000
Business acquisition additional common stock issued, value												1,000,000
Non-cash pre-tax re-measurement gain										21,500,000
Cash entitled to be received by seller based on certain criteria										7,000,000
Prepaid royalties										7,000,000
Guaranteed minimum royalties period										2 years
Amount released as part of agreement termination											2,000,000
Contingency provision amended and considered earned by NT											5,000,000
Percentage of interest in joint venture after transaction																																																																									51.00%
Indebtedness of joint venture																																																																									90,000,000
Payments for holders of a promissory notes																																																																							52,700,000
Gain on sale of interest in subsidiary																																																																																	7,000,000
Preferred profit distribution to the Company																	23,000,000																																																																	6,000,000
Acquisition of interest in MG Icon			3,000,000	4,000,000										4,000,000	11,000,000
Cash entitled to be received by seller based on certain criteria														3,000,000
Additional cash received by seller																1,000,000
Additional installment payment to be received by seller																		1,000,000	1,000,000
Business acquisition remaining amount owed to Purim															7,000,000
Business acquisition remaining amount owed to Purim included in other current liabilities															5,000,000
Business acquisition remaining amount owed included in other liabilities															2,000,000
Notes loaned to subsidiary																																																																																				17,500,000	2,200,000	4,200,000
Notes receivable, annual interest rate																																																																																				6.00%
Notes receivable, minimum principal annual installments																																																																																				$ 2,200,000
Notes receivable, maturity date																																																																																				Jun. 03, 2015