Shareholders' Equity (Schedule Of Dividends Paid) (Details) - USD ($) $ / shares in Units, $ in Thousands									3 Months Ended		9 Months Ended
	Oct. 02, 2015	Jul. 02, 2015	Apr. 30, 2015	Apr. 02, 2015	Jan. 02, 2015	Oct. 02, 2014	Jul. 02, 2014	May. 01, 2014	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Dividends, Common Stock [Abstract]
Dividends paid per common share									$ 0.260	$ 0.225	$ 0.710	$ 0.559
Common shares
Dividends, Common Stock [Abstract]
Dividends paid per common share		$ 0.26		$ 0.225	$ 0.225	$ 0.225	$ 0.225
Payment of quarterly dividends		$ 23,606		$ 21,528	$ 21,669
Dividends declared per share			$ 0.26					$ 0.225
Subsequent event | Common shares
Dividends, Common Stock [Abstract]
Dividends paid per common share	$ 0.260