Loans (Schedule Of Allowance For Loan Losses By Portfolio Segment) (Details) (USD $) In Thousands	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011 Commercial Loans [Member]	Jun. 30, 2010 Commercial Loans [Member]	Jun. 30, 2011 Commercial Loans [Member]	Jun. 30, 2010 Commercial Loans [Member]	Jun. 30, 2011 Real Estate Construction Loans [Member]	Jun. 30, 2010 Real Estate Construction Loans [Member]	Jun. 30, 2011 Real Estate Construction Loans [Member]	Jun. 30, 2010 Real Estate Construction Loans [Member]	Jun. 30, 2011 Commercial Mortgage Loans [Member]	Jun. 30, 2010 Commercial Mortgage Loans [Member]	Jun. 30, 2011 Commercial Mortgage Loans [Member]	Jun. 30, 2010 Commercial Mortgage Loans [Member]	Jun. 30, 2011 Residential Mortgage And Equity Lines [Member]	Jun. 30, 2010 Residential Mortgage And Equity Lines [Member]	Jun. 30, 2011 Residential Mortgage And Equity Lines [Member]	Jun. 30, 2010 Residential Mortgage And Equity Lines [Member]	Jun. 30, 2011 Installment And Other Loans [Member]	Jun. 30, 2010 Installment And Other Loans [Member]	Jun. 30, 2010 Installment And Other Loans [Member]	Dec. 31, 2010 Installment And Other Loans [Member]
Beginning Balance	$ 241,030	$ 233,120	$ 245,231	$ 211,889	$ 63,194	$ 57,445	$ 63,919	$ 57,815	$ 42,554	$ 46,747	$ 43,261	$ 45,086	$ 125,295	$ 121,633	$ 128,347	$ 100,494	$ 9,949	$ 7,250	$ 9,668	$ 8,480	$ 38	$ 45	$ 14	$ 36
Provision for possible credit losses	10,627	45,089	16,790	129,377	11,004	3,769	10,882	12,467	(3,265)	(3,334)	1,389	23,642	3,532	43,479	4,880	93,294	(642)	1,180	(361)	(50)	(2)	(5)	24
Charge-offs	(26,921)	(27,847)	(39,896)	(91,864)	(8,618)	(2,267)	(9,996)	(11,913)	(4,607)	(3,736)	(10,855)	(29,199)	(13,696)	(21,844)	(19,045)	(50,752)
Recoveries	5,164	5,288	7,775	6,248	280	1,791	1,055	2,369	3,001	2,765	3,888	2,913	1,883	732	2,832	964							2
Net Charge-offs	(21,757)	(22,559)	(32,121)	(85,616)	(8,338)	(476)	(8,941)	(9,544)	(1,606)	(971)	(6,967)	(26,286)	(11,813)	(21,112)	(16,213)	(49,788)							2
Ending Balance	229,900	255,650	229,900	255,650	65,860	60,738	65,860	60,738	37,683	42,442	37,683	42,442	117,014	144,000	117,014	144,000	9,307	8,430	9,307	8,430	36	40	40	36
Reserve to impaired loans	14,264	25,295	14,264	25,295	2,482	4,685	2,482	4,685	7,140	5,059	7,140	5,059	3,481	14,697	3,481	14,697	1,161	854	1,161	854
Reserve to non-impaired loans	215,636	230,355	215,636	230,355	63,378	56,053	63,378	56,053	30,543	37,383	30,543	37,383	113,533	129,303	113,533	129,303	8,146	7,576	8,146	7,576	36	40	40
Reserve for off-balance sheet credit commitments	$ 1,547	$ 4,830	$ 1,547	$ 4,830	$ 564	$ 1,427	$ 564	$ 1,427	$ 863	$ 3,243	$ 863	$ 3,243	$ 82	$ 120	$ 82	$ 120	$ 35	$ 37	$ 35	$ 37	$ 3	$ 3	$ 3