CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
Net revenue	$ 40,771	$ 39,025	$ 121,082	$ 120,569
Operating expenses	23,515	16,071	60,014	57,379
Impairment charges	17,899	36,505	17,899	36,505
Loss on sale of assets			7,117
(Loss) income from operations	(643)	(13,551)	36,052	26,685
Other (income) expense	(31)	(214)	(135)	1,553
Interest expense, net	15,635	15,237	46,674	44,600
Loss before income taxes	(16,247)	(28,574)	(10,487)	(19,468)
Benefit from income taxes	(8,213)	(3,842)	(6,838)	(142)
Net loss	(8,034)	(24,732)	(3,649)	(19,326)
Net (income) loss attributable to noncontrolling interests	(1,581)	552	(4,643)	(3,504)
Net loss attributable to Sequential Brands Group, Inc. and Subsidiaries	$ (9,615)	$ (24,180)	$ (8,292)	$ (22,830)
Loss per share attributable to Sequential Brands Group, Inc. and Subsidiaries:
Basic and diluted (in dollars per share)	$ (0.15)	$ (0.38)	$ (0.13)	$ (0.36)
Weighted-average common shares outstanding:
Basic and diluted (in shares)	63,911,481	62,998,944	63,578,121	62,796,716