Acquisitions, Joint Ventures and Investments - Additional Information (Detail)	3 Months Ended																12 Months Ended			1 Months Ended	12 Months Ended	1 Months Ended	12 Months Ended					1 Months Ended	0 Months Ended					0 Months Ended			12 Months Ended	0 Months Ended	12 Months Ended		0 Months Ended		12 Months Ended	0 Months Ended	1 Months Ended		12 Months Ended	0 Months Ended		1 Months Ended	12 Months Ended			0 Months Ended		1 Months Ended					0 Months Ended					0 Months Ended					0 Months Ended			0 Months Ended	12 Months Ended		0 Months Ended									0 Months Ended	3 Months Ended	12 Months Ended	0 Months Ended						0 Months Ended		12 Months Ended		0 Months Ended								0 Months Ended		1 Months Ended	12 Months Ended			12 Months Ended		3 Months Ended	0 Months Ended			0 Months Ended	3 Months Ended	1 Months Ended
	Dec. 31, 2013 USD ($)		Sep. 30, 2013 USD ($)		Jun. 30, 2013 USD ($)		Mar. 31, 2013 USD ($)		Dec. 31, 2012 USD ($)		Sep. 30, 2012 USD ($)		Jun. 30, 2012 USD ($)		Mar. 31, 2012 USD ($)		Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Feb. 28, 2013 Lee Cooper USD ($)	Dec. 31, 2013 Lee Cooper USD ($)	Feb. 28, 2013 Alberta ULC USD ($)	Dec. 31, 2013 Alberta ULC USD ($)	Dec. 31, 2013 Alberta ULC Current Asset USD ($)	Dec. 31, 2013 Alberta ULC Noncurrent Assets USD ($)	Dec. 31, 2013 Alberta ULC Current Liabilities USD ($)	Dec. 31, 2013 Alberta ULC Liabilities, Total USD ($)	Nov. 30, 2012 Umbro Limited USD ($)	Apr. 26, 2011 Hardy Way USD ($)	Dec. 31, 2013 Hardy Way		Apr. 30, 2011 Hardy Way	May 31, 2009 Hardy Way	Dec. 23, 2011 Hardy Way Nervous Tattoo, Inc. USD ($)	May 31, 2009 Hardy Way Equity method of accounting USD ($)	Jul. 27, 2011 Zoo York brand USD ($)	Dec. 31, 2011 Zoo York brand USD ($)	Mar. 31, 2010 MG Icon Equity method of accounting USD ($)	Dec. 31, 2013 MG Icon Equity method of accounting USD ($)	Dec. 31, 2013 MG Icon Equity method of accounting Minimum USD ($)	Jul. 31, 2013 Marcy Media USD ($)	Jul. 31, 2013 Rocawear Diffusion Brand USD ($)	Dec. 31, 2013 Rocawear Diffusion Brand USD ($)	Sep. 30, 2013 Complex Media Inc. USD ($)	Nov. 30, 2012 Umbro USD ($)	Dec. 31, 2013 Umbro Trademarks USD ($)	Dec. 31, 2013 Umbro Licensing and Other Revenue USD ($)	Jun. 30, 2013 Buffalo Brand	Feb. 28, 2013 Buffalo Brand Alberta ULC	Nov. 30, 2013 Iconix Israel Equity method of accounting USD ($)	Dec. 31, 2013 Iconix Israel Equity method of accounting USD ($)	Dec. 31, 2013 Iconix Israel Equity method of accounting Other assets - current USD ($)	Dec. 31, 2013 Iconix Israel Equity method of accounting Other Assets USD ($)	Dec. 30, 2013 Iconix Southeast Asia Equity method of accounting	Oct. 31, 2013 Iconix Southeast Asia Equity method of accounting USD ($)	Oct. 31, 2013 Iconix Southeast Asia Equity method of accounting USD ($)	Dec. 31, 2013 Iconix Southeast Asia Equity method of accounting USD ($)	Dec. 31, 2013 Iconix Southeast Asia Equity method of accounting Other assets - current USD ($)	Dec. 31, 2013 Iconix Southeast Asia Equity method of accounting Other Assets USD ($)	Dec. 31, 2013 Modern Amusement	Dec. 27, 2012 Modern Amusement Equity method of accounting USD ($)	Dec. 27, 2012 Icon MA	Dec. 31, 2013 Scion	Dec. 31, 2013 Scion Cost method of accounting USD ($)	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 ($)	Sep. 30, 2013 Scion Cost method of accounting Variable Interest Entity, Not Primary Beneficiary USD ($)	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 ($)	May 31, 2012 Scion BBC LLC Billionaire Boys ClubTM/BBCTM and Ice CreamTM USD ($)	Mar. 31, 2012 Scion BBC LLC Billionaire Boys ClubTM/BBCTM and Ice CreamTM USD ($)	Sep. 30, 2008 Parent Company Equity method of accounting USD ($)	Dec. 31, 2013 Parent Company Equity method of accounting USD ($)	Dec. 31, 2013 Parent Company Equity method of accounting INR	Jan. 31, 2013 Parent Company Cost method of accounting Variable Interest Entity, Not Primary Beneficiary USD ($)	Jan. 31, 2012 Parent Company Cost method of accounting Variable Interest Entity, Not Primary Beneficiary USD ($)	Mar. 31, 2009 Parent Company Cost method of accounting Variable Interest Entity, Not Primary Beneficiary USD ($)	Jan. 31, 2014 Parent Company Cost method of accounting Variable Interest Entity, Not Primary Beneficiary Subsequent Event 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. 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 ($)	May 17, 2013 IPH Unltd Minimum	May 17, 2013 IPH Unltd Maximum	Jan. 31, 2011 Iconix Europe Equity method of accounting USD ($)	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 ($)	Dec. 31, 2013 Beagle Scout LLC Peanuts Worldwide Other assets - current USD ($)	Dec. 31, 2013 Beagle Scout LLC Peanuts Worldwide Other assets USD ($)	Dec. 31, 2013 Latin America Territory USD ($)	Dec. 31, 2011 Latin America Territory USD ($)	Dec. 31, 2013 Latin America Territory Other assets - current USD ($)	Dec. 31, 2013 Latin America Territory Other assets 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 ($)	May 31, 2012 Iconix India Equity method of accounting USD ($)	Dec. 31, 2013 Iconix India Equity method of accounting USD ($)	Dec. 31, 2013 Iconix India Equity method of accounting Other assets - current USD ($)	Dec. 31, 2013 Iconix India Equity method of accounting Other Assets USD ($)	Dec. 31, 2013 Reliance Brands Limited Equity method of accounting USD ($)	Dec. 31, 2013 Reliance Brands Limited Equity method of accounting INR	Jun. 30, 2013 Iconix Canada USD ($)	Jun. 30, 2013 Iconix Canada Equity method of accounting USD ($)	Jun. 30, 2013 Iconix Canada Equity method of accounting Other assets - current USD ($)	Jun. 30, 2013 Iconix Canada Equity method of accounting Other Assets USD ($)	Jul. 31, 2013 Roc Nation LLC Marcy Media	Sep. 30, 2013 Iconix Australia USD ($)	Sep. 30, 2013 Iconix Australia Equity method of accounting USD ($)
Schedule of Investments [Line Items]
Business acquisition total purchase price																				$ 72,735,000									$ 62,000,000						$ 17,000,000			$ 20,000,000
Business acquisition purchase price, cash paid																				66,700,000		76,500,000						225,000,000							9,000,000	18,000,000									225,000,000																5,000,000										15,000,000	3,500,000																											172,100,000
Business acquisition, assumed liabilities																				6,000,000
Licensing and other revenue	105,264,000	[1]	107,175,000	[1]	115,125,000	[1]	105,062,000	[1]	85,131,000	[2]	86,590,000	[2]	93,646,000	[2]	88,451,000	[2]	432,626,000	353,818,000	369,845,000		10,700,000		22,900,000
Operating income	58,191,000	[1]	61,470,000	[1]	71,514,000	[1]	66,236,000	[1]	45,329,000	[2]	53,564,000	[2]	59,005,000	[2]	57,552,000	[2]	257,411,000	215,450,000	228,766,000		6,700,000		18,500,000
Amount released from escrow account																												6,800,000
Sale of trademarks																	12,229,000	4,490,000																												10,000,000
Gain on sale of assets																																															10,000,000
Controlling interest																						51.00%							85.00%			85.00%	50.00%		50.00%	100.00%		50.00%																							51.00%						16.60%					50.00%																		51.00%			51.00%	100.00%					80.00%
Percentage of minority interest in subsidiary																																									10.00%			14.40%					49.00%													49.00%																													49.00%	49.00%								20.00%
Net income attributable to non controlling interest																	14,539,000	14,101,000	15,136,000				9,000,000
Impact of consolidating joint venture on condensed consolidated balance sheet																								14,800,000	149,400,000	400,000	400,000
Percentage of interest sold in equity method investment																																																		50.00%					50.00%	50.00%																																	50.00%							50.00%	50.00%												50.00%							50.00%					50.00%
Price for sale of interest in a subsidiary																																																		3,300,000					12,000,000	12,000,000																																																					6,000,000												7,200,000
Payment received upon sale interest in subsidiary																																																		1,000,000					7,500,000																																		1,000,000						1,000,000	3,000,000													2,000,000							8,800,000
Receivable for investments sold																																																		2,300,000		800,000	1,500,000		4,500,000	4,500,000	4,500,000	3,500,000	1,000,000																														5,000,000														1,700,000		1,200,000	500,000			4,000,000	4,000,000	1,000,000	3,000,000				8,800,000	3,000,000	5,800,000
Committed amount receivable period																																																		36 months					24 months																																		30 months																				48 months							3 years
Gain on sale of interest in subsidiary																																																			2,300,000					4,700,000																																									7,000,000																								5,100,000
Percentage of equity interest subject to call option																																																5.00%		5.00%				5.00%																																																																			5.00%
Additional amount receivable up on achievement revenue targets																																																							2,000,000	2,000,000
Agreed price for sale of interest in a subsidiary																																																																																									6,000,000							4,000,000	4,000,000							5,700,000												17,700,000
Net gain recognized on sale of interest in subsidiary																																																																																						12,700,000	7,400,000	7,400,000																						5,600,000					9,800,000	9,800,000				5,100,000
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
Committed contribution to joint venture																																																																									6,500,000	5,000,000										20,000,000	9,000,000
Cash payment for acquisition of assets																	744,000	6,870,000											55,000,000												32,000,000			25,000,000																														2,000,000			2,600,000	1,100,000	2,100,000	3,000,000	2,000,000	3,000,000	4,000,000	8,000,000							45,000,000	63,500,000							141,000,000	34,000,000							1,100,000	2,100,000
Payment received upon sale of interest in subsidiary																																																																																								8,000,000
Investment with a cost basis																																																																																						2,600,000	600,000	600,000
Equity earnings on joint ventures																	12,129,000	10,887,000	10,353,000																																																																			6,400,000		3,700,000
Joint venture ownership interest																							51.00%							85.00%	[3]																													51.00%			50.00%																							50.00%	50.00%	50.00%
Fair value of investment with a cost basis																																																																																						15,300,000
Consideration paid to acquire interest in licensees																																																																			1
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	58,858,000								16,362,000								58,858,000	16,362,000																																																		5,600,000		800,000
Consolidated assets that are collateral for variable interest entity's obligations																																																																9,500,000	10,600,000
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																			21,465,000										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
Period for revenue recognition																																																																																																							3 years
Preferred profit distribution to the Company																																								23,000,000																																																										6,000,000
Acquisition of interest in MG Icon																																					18,000,000	4,000,000	11,000,000
Additional cash received by seller																																							2,000,000
Business acquisition remaining amount owed to Purim included in other current liabilities																																							7,000,000
Notes loaned to subsidiary																																																																																																				17,500,000	2,200,000	3,800,000
Notes receivable, annual interest rate																																																																																																				6.00%
Notes receivable, minimum principal annual installments																																																																																																				2,200,000
Notes receivable, maturity date																																																																																																				Jun. 03, 2015
Percentage ownership interest																																																																																																																							50.00%
Acquisition of trademarks																	372,000	633,000	568,000																							8,000,000	8,000,000
Acquisition costs																	$ 4,000,000	$ 500,000	$ 400,000

[1] FY 2013: licensing and other revenue includes a net gain of approximately $9.8 million related to the Iconix Canada transaction in the second quarter, a net gain of approximately $5.1 million related to the Iconix Australia transaction in the third quarter, and net gains of $4.7 million, $2.3 million, and $10.0 million related to the Iconix SE Asia, Iconix Israel and Umbro Korea transactions, respectively, in the fourth quarter. See Note 3 for a description of these transactions.

[2] FY 2012: licensing and other revenue includes a net gain of approximately $5.6 million related to the Iconix India transaction in the second quarter, and a net gain of approximately $6.5 million related to the OP Japan transaction in the fourth quarter. Net income attributable to Iconix Brand Group, Inc. includes a net gain of $3.7 million in the fourth quarter, representing our 50% interest in a $7.4 million net gain related to an investment through the Iconix China joint venture. See Note 3 for a description of these transactions.

[3] In May 2009 the Company purchased a 50% in Hardy Way. In April 2011, the Company acquired an additional interest in Hardy Way to bring its total ownership interest in Hardy Way to 85%. See Note 3 for additional details on this transaction.