Consolidated Statement of Operations - USD ($) shares in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Statement [Abstract]
Licensing revenue	$ 368,461,000	$ 379,197,000	$ 391,490,000
Selling, general and administrative expenses	206,589,000	204,946,000	181,651,000
Depreciation and amortization	3,461,000	4,720,000	7,135,000
Equity earnings on joint ventures	(3,578,000)	(5,330,000)	(11,325,000)
Gains on sale of trademarks, net	(38,104,000)		(6,399,000)
Goodwill impairment	18,331,000	35,132,000	0
Trademark impairment	424,890,000	402,392,000	0
Operating income (loss)	(243,128,000)	(262,663,000)	220,428,000
Other expenses (income):
Interest expense	97,542,000	86,233,000	84,523,000
Interest income	(1,580,000)	(4,230,000)	(3,711,000)
Other income, net	(17,508,000)	(50,904,000)	(29,239,000)
Loss on extinguishment of debt, net	5,903,000
Foreign currency translation loss (gain)	(1,484,000)	(9,488,000)	1,745,000
Other expenses – net	82,873,000	21,611,000	53,318,000
Income (loss) before income taxes	(326,001,000)	(284,274,000)	167,110,000
Provision (benefit) for income taxes	(76,492,000)	(95,344,000)	48,288,000
Net (loss) income	(249,509,000)	(188,930,000)	118,822,000
Less: Net income attributable to non-controlling interest	2,625,000	373,000	15,099,000
Net (loss) income attributable to Iconix Brand Group, Inc.	$ (252,134,000)	$ (189,303,000)	$ 103,723,000
Earnings (loss) per share:
Basic	$ (4.82)	$ (3.92)	$ 2.14
Diluted	$ (4.82)	$ (3.92)	$ 1.81
Weighted average number of common shares outstanding:
Basic	52,338	48,293	48,431
Diluted	52,338	48,293	57,366