Goodwill And Other Intangible Assets (Summary Of Finite-Lived Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2011
Indefinite-lived Intangible Assets by Major Class [Line Items]
Total other intangible assets, net	$ 22,101	$ 22,070	$ 12,056
Specialty Finance [Member] | Customer List Intangibles [Member]
Indefinite-lived Intangible Assets by Major Class [Line Items]
Gross carrying amount	1,800	1,800	1,800
Accumulated amortization	(510)	(460)	(306)
Net carrying amount	1,290	1,340	1,494
Community Banking [Member] | Core Deposits Intangibles [Member]
Indefinite-lived Intangible Assets by Major Class [Line Items]
Gross carrying amount	36,053	35,587	29,772
Accumulated amortization	(22,347)	(21,457)	(19,210)
Net carrying amount	13,706	14,130	10,562
Wealth Management [Member] | Customer List And Other Intangibles [Member]
Indefinite-lived Intangible Assets by Major Class [Line Items]
Gross carrying amount	7,390	6,790
Accumulated amortization	(285)	(190)
Net carrying amount	$ 7,105	$ 6,600