Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement Of Income And Comprehensive Income [Abstract]
Net (loss) income	$ (249,509)	$ (188,930)	$ 118,822
Other comprehensive income (loss):
Foreign currency translation loss	(7,545)	(36,004)	(40,672)
Change in fair value of available for sale securities	(1,990)	(703)
Total other comprehensive loss	(9,535)	(36,707)	(40,672)
Comprehensive income (loss)	(259,044)	(225,637)	78,150
Less: comprehensive income attributable to non-controlling interest	2,625	373	15,099
Comprehensive (loss) income attributable to Iconix Brand Group, Inc.	$ (261,669)	$ (226,010)	$ 63,051