Income Taxes (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013
Valuation Allowance [Line Items]
Effective Income Tax Rate, Continuing Operations	49.50%	51.30%	46.80%	45.00%
Provision for income taxes	$ 4,839,000	$ 6,874,000	$ 10,772,000	$ 15,601,000
Unrecognized Tax Benefits, Period Increase (Decrease)	300,000
CALIFORNIA
Valuation Allowance [Line Items]
Deferred Tax Assets, Valuation Allowance	4,400,000		4,400,000
SOUTH CAROLINA
Valuation Allowance [Line Items]
Deferred Tax Assets, Valuation Allowance	900,000		900,000
CANADA
Valuation Allowance [Line Items]
Deferred Tax Assets, Valuation Allowance	$ 1,300,000		$ 1,300,000