CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands	Total Sequential Brands Group, Inc. and Subsidiaries Stockholders' Equity	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Accumulated Deficit [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]	Total
Balance at Dec. 31, 2017	$ 281,991	$ 635	$ 508,444	$ 80	$ (225,369)		$ 71,547	$ 353,538
Balance (in shares) at Dec. 31, 2017		63,652,721
Treasury stock at Dec. 31, 2017						$ (1,799)
Treasury stock, shares at Dec. 31, 2017						(424,994)
Stock-based compensation	1,345	$ 2	1,343					1,345
Stock-based compensation (in shares)		452,929
Shares issued under stock incentive plan	1,500	$ 8	1,492					1,500
Shares issued under stock incentive plan (in shares)		843,486
Unrealized gain (loss) on interest rate caps, net of tax	679			679				679
Repurchase of common stock	(1,919)					$ (1,919)		(1,919)
Repurchase of common stock (in shares)						(986,858)
Noncontrolling interest distribution							(1,244)	(1,244)
Net income attributable to noncontrolling interest							1,960	1,960
Net loss attributable to common stockholders	(2,264)				(2,264)			(2,264)
Treasury stock at Mar. 31, 2018						$ (3,718)
Treasury stock, shares at Mar. 31, 2018						(1,411,852)
Balance at Mar. 31, 2018	282,462	$ 645	511,279	759	(226,503)		72,618	355,080
Balance (in shares) at Mar. 31, 2018		64,949,136
Cumulative effect of revenue recognition accounting change	1,130				1,130		355	1,485
Stock-based compensation	770	$ 6	764					770
Stock-based compensation (in shares)		420,770
Unrealized loss on equity securities	(228)			(228)				(228)
Unrealized gain (loss) on interest rate caps, net of tax	(238)			(238)				(238)
Repurchase of common stock	(83)					$ (83)		(83)
Repurchase of common stock (in shares)						(42,669)
Noncontrolling interest distribution							(2,943)	(2,943)
Net income attributable to noncontrolling interest							1,102	1,102
Net loss attributable to common stockholders	3,587				3,587			3,587
Treasury stock at Jun. 30, 2018						$ (3,801)
Treasury stock, shares at Jun. 30, 2018						(1,454,521)
Balance at Jun. 30, 2018	286,270	$ 651	512,043	293	(222,916)		70,777	357,047
Balance (in shares) at Jun. 30, 2018		65,369,906
Balance at Dec. 31, 2018	273,918	$ 657	513,764	(1,554)	(234,723)		70,726	344,644
Balance (in shares) at Dec. 31, 2018		65,990,179
Treasury stock at Dec. 31, 2018						$ (4,226)		$ (4,226)
Treasury stock, shares at Dec. 31, 2018						(1,662,597)		(1,662,597)
Stock-based compensation	726	$ 5	721					$ 726
Stock-based compensation (in shares)		457,734
Unrealized gain (loss) on interest rate caps, net of tax	(1,480)			(1,480)				(1,480)
Repurchase of common stock	(170)					$ (170)		(170)
Repurchase of common stock (in shares)						(134,839)
Noncontrolling interest distribution							(1,093)	(1,093)
Net income attributable to noncontrolling interest							1,539	1,539
Net loss attributable to common stockholders	(125,345)				(125,345)			(125,345)
Treasury stock at Mar. 31, 2019						$ (4,396)
Treasury stock, shares at Mar. 31, 2019						(1,797,436)
Balance at Mar. 31, 2019	147,649	$ 662	514,485	(3,034)	(360,068)		71,172	218,821
Balance (in shares) at Mar. 31, 2019		66,447,913
Stock-based compensation	567	$ 6	561					567
Stock-based compensation (in shares)		383,456
Shares issued from treasury stock			(1,124)			$ 1,124
Shares issued from treasury stock (in shares						464,576
Unrealized gain (loss) on interest rate caps, net of tax	(1,684)			(1,684)				(1,684)
Repurchase of common stock	(78)					$ (78)		(78)
Repurchase of common stock (in shares)						(93,621)
Noncontrolling interest distribution							(2,046)	(2,046)
Net income attributable to noncontrolling interest							1,455	1,455
Net loss attributable to common stockholders	(4,599)				(4,599)			(4,599)
Treasury stock at Jun. 30, 2019						$ (3,350)		$ (3,350)
Treasury stock, shares at Jun. 30, 2019						(1,426,481)		(1,426,481)
Balance at Jun. 30, 2019	$ 141,855	$ 668	$ 513,922	$ (4,718)	$ (364,667)		$ 70,581	$ 212,436
Balance (in shares) at Jun. 30, 2019		66,831,369