Shareholders' Equity (Summary Of Stock Option Activity) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Shareholders' Equity [Abstract]
Options Outstanding, Balance, beginning of year	2,067	1,763	1,819
Options Outstanding, Granted	237	450	229
Options Outstanding, Exercised	(40)	(112)	(51)
Options Outstanding, Forfeited/expired	(113)	(34)	(234)
Options Outstanding, Balance, end of year	2,151	2,067	1,763
Weighted Avg. Exercise Price, Balance beginning of year	$ 14.82	$ 15.05	$ 15.66
Weighted-Avg Exercise Price, Granted	$ 11.01	$ 12.39	$ 9.34
Weighted-Avg Exercise Price, Exercised	$ 7.67	$ 8.97	$ 5.93
Weighted-Avg Exercise Price, Forfeited/expired	$ 15.72	$ 13.83	$ 16.20
Weighted Avg. Exercise Price, Balance, end of year	$ 14.48	$ 14.82	$ 15.05
Options exercisable, end of year, Options Outstanding	1,334	1,217	1,071
Options exercisable, end of year, Weighted Avg. Exercise Price	$ 16.13	$ 16.65	$ 15.90