Goodwill And Other Intangible Assets (Schedule Of Changes In The Carrying Amount Of Goodwill) (Details) (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Beginning Balance	$ 167,884	$ 167,884
Goodwill acquired during the period	68,429	0
Ending Balance	236,313	167,884
Community Banking [Member]
Beginning Balance	128,011	128,011
Goodwill acquired during the period	67,536	0
Ending Balance	195,547	128,011
Other Segment [Member]
Beginning Balance	39,873	39,873
Goodwill acquired during the period	893	0
Ending Balance	$ 40,766	$ 39,873