Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Channel
Revenues, net	$ 165,096	$ 103,004	$ 287,471	$ 186,652
Channel [Member]
Channel
Revenues, net	165,096	103,004	287,471	186,652
Channel [Member] | Direct-to-consumer [Member]
Channel
Revenues, net	145,180	63,710	225,867	117,474
Channel [Member] | Wholesale partner [Member]
Channel
Revenues, net	19,916	39,294	61,604	69,178
Product [Member]
Channel
Revenues, net	165,096	103,004	287,471	186,652
Product [Member] | Bedding [Member]
Channel
Revenues, net	150,503	96,383	265,004	173,826
Product [Member] | Other [Member]
Channel
Revenues, net	$ 14,593	$ 6,621	$ 22,467	$ 12,826