Subsequent Event (Narrative) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended			0 Months Ended		12 Months Ended
	Dec. 31, 2013	Sep. 29, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jul. 01, 2012	Apr. 01, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Mar. 14, 2014 Subsequent Event [Member]	Feb. 14, 2014 Subsequent Event [Member]	Dec. 31, 2012 Subsequent Event [Member]
Subsequent Event [Line Items]
Net sales	$ 134,990	$ 100,612	$ 101,396	$ 83,190	$ 141,790	$ 116,813	$ 117,114	$ 96,773	$ 420,188	$ 472,490	$ 431,021			$ 15,000
Regular dividends per share paid													$ 1.00
Extra dividends per share paid													$ 4.05
Dividends paid										$ 86,106	$ 56,665	$ 34,954