Shareholders' Equity (Summary Of Stock Option Activity) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Shareholders' Equity [Abstract]
Options Outstanding, Balance, beginning of year	2,151	2,067	1,763
Options Outstanding, Granted	20	237	450
Options Outstanding, Exercised	(174)	(40)	(112)
Options Outstanding, Forfeited/expired	(147)	(113)	(34)
Options Outstanding, Balance, end of year	1,850	2,151	2,067
Options exercisable, end of year, Options Outstanding	1,263	1,334	1,217
Weighted Avg Exercise Price, Balance beginning of year	$ 14.48	$ 14.82	$ 15.05
Weighted Avg Exercise Price, Granted	$ 11.98	$ 11.01	$ 12.39
Weighted-Avg Exercise Price, Exercised	$ 5.63	$ 7.67	$ 8.97
Weighted-Avg Exercise Price, Forfeited/expired	$ 13.45	$ 15.72	$ 13.83
Weighted Avg Exercise Price, Balance, end of year	$ 15.37	$ 14.48	$ 14.82
Options exercisable, end of year, Weighted Avg. Exercise Price	$ 17.11	$ 16.13	$ 16.65