Income Taxes Income Tax Reconciliation, Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 26, 2016	Mar. 28, 2015	Dec. 26, 2015
Income Tax Disclosure [Abstract]
Effective income tax rate	33.70%	38.50%
Effective Income Tax Rate Reconciliation, Tax Credit, Other, Amount	$ 671
Deferred Tax Assets, Net	$ 7,119		$ 4,726