Income Taxes Deferred Income Taxes (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Jan. 02, 2016
Deferred Tax Assets [Abstract]
Stock-based compensation	$ 9,834	$ 8,756
Deferred rent and lease incentives	8,388	6,977
Warranty and returns liabilities	7,948	10,817
Net operating loss carryforwards and credits	6,368	7,847
Compensation and benefits	4,115	3,788
Other	5,264	4,561
Total gross deferred tax assets	41,917	42,746
Valuation allowance	(620)	(1,441)
Total deferred tax assets after valuation allowance	41,297	41,305
Deferred Tax Liabilities [Abstract]
Property and equipment	27,049	26,330
Deferred revenue	3,279	5,598
Other	6,302	6,341
Total gross deferred tax liabilities	36,630	38,269
Net deferred tax assets	4,667	$ 3,036
Federal [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	10,000
State [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 14,800