Goodwill And Other Intangible Assets (Schedule Of Changes In The Carrying Amount Of Goodwill) (Details) (USD $) In Thousands	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010
Beginning Balance	$ 167,884	$ 167,884
Goodwill acquired during the period	98,101	0
Ending Balance	265,985	167,884
Community Banking [Member]
Beginning Balance	128,011	128,011
Goodwill acquired during the period	97,209	0
Ending Balance	225,220	128,011
Other Segment [Member]
Beginning Balance	39,873	39,873
Goodwill acquired during the period	892	0
Ending Balance	$ 40,765	$ 39,873

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

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-Name Statement of Financial Accounting Standard (FAS)

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

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