Inventories (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Jan. 02, 2016
Inventory Disclosure [Abstract]
Raw materials	$ 7,973	$ 9,349
Work in progress	72	48
Finished goods	66,981	77,203
Inventories	75,026	86,600
Components of finished goods inventory [Abstract]
Finished beds included in finished goods inventory	20,700	22,500
Finished components included in finished goods inventory	29,200	40,300
Retail accessories included in finished goods inventory	$ 17,100	$ 14,400