Earnings Per Share Narrative (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Sep. 28, 2012	Sep. 29, 2011	Sep. 29, 2010
Class of Stock [Line Items]
Effect of stock dividend	$ 0	$ 0	$ 0
Increase in number of shares subject to outstanding stock options	5.00%	5.00%
Dividend equivalent rights	4,007	2,709	2,580
Tax on payments of dividend equivalent rights	91	26	25
Common Stock [Member]
Class of Stock [Line Items]
Stock dividend paid to company stockholders				5.00%	5.00%	5.00%
Effect of stock dividend	$ 450	$ 414	$ 378
Increase in number of shares subject to outstanding stock options	5.00%	5.00%	5.00%