Goodwill And Other Intangible Assets (Narrative) (Details) (USD $)	3 Months Ended	12 Months Ended						3 Months Ended
	Dec. 31, 2009	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Jul. 29, 2011	Jun. 30, 2011	Mar. 31, 2011 Monroe Bancorp [Member]	Dec. 31, 2011 Integra Bank [Member]	Sep. 30, 2011 Integra Bank [Member]	Jun. 30, 2011 Community Banking [Member]	Mar. 31, 2011 Community Banking [Member]	Mar. 31, 2011 Other Segment [Member]
Goodwill impairment	$ 500,000
Goodwill	167,884,000	253,177,000	167,884,000	167,884,000	16,900,000		68,400,000		16,900,000		67,500,000	900,000
Other intangible assets estimated useful lives, Minimum (in years)		5
Other intangible assets estimated useful lives, Maximum (in years)		25
Core deposit intangibles							8,200,000		4,300,000
Customer relationship intangible assets		300,000				1,300,000	2,300,000			100,000
Accelerated amortization on core deposit intangible		$ 8,829,000	$ 6,130,000	$ 5,988,000				$ 700,000