Loans (Activity Of Troubled Debt Restructuring Loans) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Accruing TDRs [Member]
Financing Receivable, Modifications [Line Items]
Beginning balance	$ 136,800,000	$ 54,992,000
New restructurings	60,863,000	55,815,000
Restructured loans restored to accrual status	709,000	53,432,000
Charge-offs	(2,341,000)
Payments	(46,313,000)	(8,205,000)
Restructured loans placed on nonaccrual	(28,969,000)	(18,371,000)
Expiration of loan concession	(733,000)	(863,000)
Ending balance	120,016,000	136,800,000
Non-Accrual TDRs [Member]
Financing Receivable, Modifications [Line Items]
Beginning balance	28,146,000	41,609,000
New restructurings	13,269,000	74,543,000
Restructured loans restored to accrual status	(709,000)	(53,432,000)
Charge-offs	(7,303,000)	(21,293,000)
Payments	(3,355,000)	(8,035,000)
Restructured loans placed on nonaccrual	28,969,000	18,371,000
Foreclosures	(8,147,000)	(23,617,000)
Ending balance	$ 50,870,000	$ 28,146,000