Unaudited Condensed Consolidated Income Statements - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Licensing revenue	$ 61,647	$ 68,209	$ 120,370	$ 135,885
Selling, general and administrative expenses	26,802	29,506	52,192	62,107
Loss on termination of licenses	23,230		23,230
Depreciation and amortization	571	895	1,223	1,860
Equity earnings on joint ventures	(1,059)	(1,363)	(1,992)	(2,556)
Gain on deconsolidation of joint venture	(3,772)		(3,772)
Gain (loss) on sale of trademarks		1,125	0	(9,844)
Operating income	15,875	38,046	49,489	84,318
Other expenses (income):
Interest expense	14,130	21,890	28,876	41,417
Interest income	(141)	(193)	(267)	(547)
Other income		(9)	(1)	(16)
Loss (gain) on extinguishment of debt	13,919	(4,288)	19,400	(4,288)
Foreign currency translation loss (gain)	3,416	(734)	3,845	(116)
Other expenses – net	31,324	16,666	51,853	36,450
(Loss) income from continuing operations before income taxes	(15,449)	21,380	(2,364)	47,868
Provision (benefit) for income taxes	(5,501)	6,888	386	15,724
Net (loss) income from continuing operations	(9,948)	14,492	(2,750)	32,144
Less: Net income attributable to non-controlling interest from continuing operations	3,904	3,890	6,386	6,916
Net (loss) income from continuing operations attributable to Iconix Brand Group, Inc.	(13,852)	10,602	(9,136)	25,228
(Loss) income from discontinued operations before income taxes	(11,140)	3,387	(23,924)	10,625
Gain on sale of Entertainment segment	104,327		104,327
Provision for income taxes	34,060	805	28,962	2,577
Net income from discontinued operations	59,127	2,582	51,441	8,048
Less: Net income attributable to non-controlling interest from discontinued operations	1,634	1,602	2,943	3,081
Net income from discontinued operations attributable to Iconix Brand Group, Inc.	57,493	980	48,498	4,967
Net income attributable to Iconix Brand Group, Inc.	$ 43,641	$ 11,582	$ 39,362	$ 30,195
Earnings (loss) per share - basic:
Continuing operations	$ (0.26)	$ 0.22	$ (0.20)	$ 0.52
Discontinued operations	1.01	0.02	0.85	0.10
Earnings per share - basic	0.75	0.24	0.65	0.62
Earnings (loss) per share - diluted:
Continuing operations	(0.26)	0.21	(0.19)	0.50
Discontinued operations	1.00	0.02	0.84	0.10
Earnings per share - diluted	$ 0.74	$ 0.23	$ 0.65	$ 0.60
Weighted average number of common shares outstanding:
Basic	57,082	49,035	57,026	48,772
Diluted	57,568	50,675	57,568	50,501