Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2015	Jun. 29, 2014	Jun. 28, 2015	Jun. 29, 2014
Income Tax Disclosure [Abstract]
Income tax provision	$ 7,258	$ 9,698	$ 17,273	$ 18,735
Provision for income taxes (in percentage)	66.40%	39.70%	59.70%	39.20%
Possible reduction in liabilities for uncertain tax positions	$ 1,100		$ 1,100