Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016
Valuation Allowance [Line Items]
Effective Income Tax Rate, Continuing Operations	41.10%	40.70%	41.70%	41.00%
Provision for income taxes	$ 14,784	$ 14,812	$ 9,977	$ 8,682
CALIFORNIA
Valuation Allowance [Line Items]
Deferred Tax Assets, Valuation Allowance	4,100		4,100
SOUTH CAROLINA
Valuation Allowance [Line Items]
Deferred Tax Assets, Valuation Allowance	600		600
CANADA
Valuation Allowance [Line Items]
Deferred Tax Assets, Valuation Allowance	1,400		$ 1,400
Maximum [Member]
Valuation Allowance [Line Items]
Unrecognized Tax Benefits, Period Increase (Decrease)	$ 100