Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 28, 2016	Mar. 29, 2016	Jun. 30, 2015	Jun. 28, 2016	Jun. 30, 2015
Tax Credit Carryforward [Line Items]
Income tax expense (benefit), excluding canada valuation allowance		$ 1,300
Provision (benefit) for income taxes	$ 2,177		$ 1,756	$ 1,083	$ (39)
UNITED STATES
Tax Credit Carryforward [Line Items]
Deferred tax assets, valuation allowance	700			700
US and Canada
Tax Credit Carryforward [Line Items]
Deferred tax assets, valuation allowance	$ 900			$ 900