Income Taxes (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013
Income Tax Disclosure [Abstract]
Income tax provision	$ 9,037,000	$ 8,545,000
Provision for income taxes (in percentage)	38.50%	35.80%
Income Tax Reconciliation, Tax Credits, Research		734,000
Possible reduction in liabilities for uncertain tax positions	$ 2,800,000