Income Taxes - Net Deferred Tax Assets (Details) - USD ($) $ in Thousands	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Deferred tax assets
Reserves and accruals	$ 27,991	$ 24,315
Tax credits and net operating loss carryforwards	7,781	6,810
Property and equipment	1,360	1,382
Stock-based compensation	4,975	4,277
Deferred Tax Assets, Gross	42,107	36,784
Valuation allowance	(1,148)	(800)	$ 0
Total deferred tax assets	40,959	35,984
Deferred tax liabilities
Intangible assets	7,317	13,419
Other	668	573
Reserves and accruals	7,985	13,992
Deferred Tax Assets, Net	$ 32,974	$ 21,992