CONDENSED 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 (loss) attributable to noncontrolling interest							1,960	1,960
Net income (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
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)
Treasury stock at Sep. 30, 2018						$ (4,217)
Treasury stock, shares at Sep. 30, 2018						(1,657,217)
Balance at Sep. 30, 2018	277,280	$ 656	513,439	(67)	(232,531)		71,220	348,500
Balance (in shares) at Sep. 30, 2018		65,934,552
Cumulative effect of revenue recognition accounting change	1,130				1,130		355	1,485
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
Treasury stock at Mar. 31, 2018						$ (3,718)
Treasury stock, shares at Mar. 31, 2018						(1,411,852)
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 (loss) attributable to noncontrolling interest							1,102	1,102
Net income (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
Stock-based compensation	1,401	$ 5	1,396					1,401
Stock-based compensation (in shares)		564,646
Unrealized loss on equity securities	(49)			(49)				(49)
Unrealized gain (loss) on interest rate caps, net of tax	(311)			(311)				(311)
Repurchase of common stock	(416)					$ (416)		(416)
Repurchase of common stock (in shares)						(202,696)
Noncontrolling interest distribution							(1,138)	(1,138)
Net income (loss) attributable to noncontrolling interest							1,581	1,581
Net income (loss) attributable to common stockholders	(9,615)				(9,615)			(9,615)
Treasury stock at Sep. 30, 2018						$ (4,217)
Treasury stock, shares at Sep. 30, 2018						(1,657,217)
Balance at Sep. 30, 2018	277,280	$ 656	513,439	(67)	(232,531)		71,220	348,500
Balance (in shares) at Sep. 30, 2018		65,934,552
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 (loss) attributable to noncontrolling interest							1,539	1,539
Net income (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 (loss) attributable to noncontrolling interest							1,455	1,455
Net income (loss) attributable to common stockholders	(4,599)				(4,599)			(4,599)
Treasury stock at Jun. 30, 2019						$ (3,350)
Treasury stock, shares at Jun. 30, 2019						(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
Stock-based compensation	150		150					150
Stock-based compensation (in shares)		23,063
Unrealized gain (loss) on interest rate caps, net of tax	78			78				78
Noncontrolling interest distribution							(1,064)	(1,064)
Net income (loss) attributable to noncontrolling interest							(9,449)	(9,449)
Net income (loss) attributable to common stockholders	(18,680)				(18,680)			(18,680)
Treasury stock at Sep. 30, 2019						$ (3,350)		$ (3,350)
Treasury stock, shares at Sep. 30, 2019						(1,426,481)		(1,426,481)
Balance at Sep. 30, 2019	$ 123,403	$ 668	$ 514,072	$ (4,640)	$ (383,347)		$ 60,068	$ 183,471
Balance (in shares) at Sep. 30, 2019		66,854,432