Shareholders' Equity (Summary Of Stock Option Activity) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012
Shareholders' Equity [Abstract]
Options Outstanding, Balance, beginning of period	2,151
Options Outstanding, Exercised	(2)
Options Outstanding, Forfeited/expired	(91)
Options Outstanding, Balance, end of period	2,058
Weighted Avg Exercise Price, Balance beginning of period	$ 14.48
Weighted-Avg Exercise Price, Exercised	$ 9.33
Weighted-Avg Exercise Price, Forfeited/expired	$ 13.35
Weighted Avg Exercise Price, Balance, end of period	$ 14.54
Weighted Avg Remaining Contractual Term (Years)	5.56
Aggregate Intrinsic Value, Balance, end of period	$ 3,683
Options exercisable, end of year, Options Outstanding	1,382
Options exercisable, end of year, Weighted Avg. Exercise Price	$ 15.95
Options exercisable, end of period - Weighted-Avg Remaining Contractual Term (Years)	4.37
Options exercisable, end of period - Aggregate Intrinsic Value	$ 2,337