Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2013	Mar. 31, 2013	Jul. 01, 2012	Jun. 30, 2013	Jul. 01, 2012
Income Tax Disclosure [Abstract]
Effective Income Tax Rate, Continuing Operations	29.60%		61.20%	13.20%	24.10%
Effective Income Tax Rate Reconciliation, At Federal Statutory Income Tax Rate				35.00%
Reversal Of Deferred Tax Liability Relating To Investment In Foreign Subsidiaries		$ 1,934