CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands	Total Sequential Brands Group, Inc. and Subsidiaries Stockholders' Equity Interest Rate Cap [Member]	Total Sequential Brands Group, Inc. and Subsidiaries Stockholders' Equity Interest Rate Swap [Member]	Total Sequential Brands Group, Inc. and Subsidiaries Stockholders' Equity Interest Rate Hedging Member	Total Sequential Brands Group, Inc. and Subsidiaries Stockholders' Equity	Common Stock [Member] Galaxy Brand Holdings, Inc. [Member]	Common Stock [Member]	Additional Paid-In Capital [Member] Galaxy Brand Holdings, Inc. [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Loss [Member] Interest Rate Cap [Member]	Accumulated Other Comprehensive Loss [Member] Interest Rate Swap [Member]	Accumulated Other Comprehensive Loss [Member] Interest Rate Hedging Member	Accumulated Other Comprehensive Loss [Member]	Accumulated Deficit [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]	Interest Rate Cap [Member]	Interest Rate Swap [Member]	Interest Rate Hedging Member	Total
Balance at Dec. 31, 2015				$ 451,488		$ 605		$ 496,179				$ (6,466)	$ (38,830)		$ 74,161				$ 525,649
Balance (in shares) at Dec. 31, 2015						60,480,474
Stock-based compensation				6,404		$ 5		6,399											6,404
Stock-based compensation (in shares)						746,567
Issuance of common stock in connection with warrant exercise					$ 14		$ (14)
Issuance of common stock in connection with warrant exercise (in shares)					1,375,000
Unrealized gain on available-for-sale securities																			2,062
Unrealized gain and reclassification adjustment on available-for-sale securities				6,437								6,437							6,437
Unrealized gain ( loss) on interest rate	$ (144)		$ 29						$ (144)		$ 29					$ (144)		$ 29
Repurchase of common stock				(638)										$ (638)					(638)
Repurchase of common stock (in shares)														(97,686)
Noncontrolling interest distribution															(6,800)				(6,800)
Net income attributable to noncontrolling interest															7,452				7,452
Net loss attributable to common stockholders				(821)									(821)						(821)
Balance at Dec. 31, 2016				462,755		$ 624		502,564				(144)	(39,651)	$ (638)	74,813				537,568
Balance (in shares) at Dec. 31, 2016						62,602,041
Treasury stock, shares														(97,686)
Stock-based compensation				5,911		$ 11		5,900											5,911
Stock-based compensation (in shares)						1,050,680
Stock registration costs				(20)				(20)											(20)
Unrealized gain ( loss) on interest rate	224								224							224
Repurchase of common stock				(1,161)										$ (1,161)					(1,161)
Repurchase of common stock (in shares)														(327,308)
Noncontrolling interest distribution															(7,438)				(7,438)
Net income attributable to noncontrolling interest															4,172				4,172
Net loss attributable to common stockholders				(185,718)									(185,718)						(185,718)
Balance at Dec. 31, 2017				281,991		$ 635		508,444				80	(225,369)	$ (1,799)	71,547				353,538
Balance (in shares) at Dec. 31, 2017						63,652,721								(424,994)
Treasury stock																			$ (1,799)
Treasury stock, shares																			(424,994)
Shares issued under stock incentive plan				1,500		$ 8		1,492											$ 1,500
Shares issued under stock incentive plan (in shares)						843,486
Stock-based compensation				3,842		$ 14		3,828											3,842
Stock-based compensation (in shares)						1,493,972
Unrealized gain ( loss) on interest rate	$ (80)	$ (1,554)							$ (80)	$ (1,554)						$ (80)	$ (1,554)
Repurchase of common stock				(2,427)										$ (2,427)					(2,427)
Repurchase of common stock (in shares)														(1,237,603)
Noncontrolling interest distribution															(6,682)				(6,682)
Net income attributable to noncontrolling interest															5,506				5,506
Net loss attributable to common stockholders				(10,484)									(10,484)						(10,484)
Balance at Dec. 31, 2018				273,918		$ 657		$ 513,764				$ (1,554)	(234,723)	$ (4,226)	70,726				344,644
Balance (in shares) at Dec. 31, 2018						65,990,179								(1,662,597)
Cumulative effect of revenue recognition accounting change				$ 1,130									$ 1,130		$ 355				1,485
Treasury stock																			$ (4,226)
Treasury stock, shares																			(1,662,597)