Allowance For Loan Losses, Allowance For Losses On Lending-Related Commitments And Impaired Loans (Summary Of The Post-Modification Balance Of Loans Restructured) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012		Mar. 31, 2011
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	31	[1]	15	[1]
Balance	$ 39,683	[1]	$ 9,359	[1]
Residential Real Estate And Other [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	4	[1]	1	[1]
Balance	1,046	[1]	187	[1]
Commercial And Industrial [Member] | Commercial [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	3	[1]	7	[1]
Balance	118	[1]	1,685	[1]
Commercial Construction [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	2	[1]
Balance	622	[1]
Land [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	14	[1]	1	[1]
Balance	27,992	[1]	1,511	[1]
Office [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count			3	[1]
Balance			2,469	[1]
Industrial [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count			2	[1]
Balance			3,223	[1]
Retail [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	5	[1]
Balance	8,633	[1]
Mixed Use And Other [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	3	[1]	1	[1]
Balance	1,272	[1]	284	[1]
Extension At Below Market Terms [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	28		11
Balance	39,460		8,647
Extension At Below Market Terms [Member] | Residential Real Estate And Other [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	3
Balance	927
Extension At Below Market Terms [Member] | Commercial And Industrial [Member] | Commercial [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	1		5
Balance	14		1,551
Extension At Below Market Terms [Member] | Commercial Construction [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	2
Balance	622
Extension At Below Market Terms [Member] | Land [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	14		1
Balance	27,992		1,511
Extension At Below Market Terms [Member] | Office [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count			2
Balance			2,078
Extension At Below Market Terms [Member] | Industrial [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count			2
Balance			3,223
Extension At Below Market Terms [Member] | Retail [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	5
Balance	8,633
Extension At Below Market Terms [Member] | Mixed Use And Other [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	3		1
Balance	1,272		284
Reduction Of Interest Rate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	22		8
Balance	37,589		2,827
Reduction Of Interest Rate [Member] | Residential Real Estate And Other [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	1		1
Balance	118		187
Reduction Of Interest Rate [Member] | Commercial And Industrial [Member] | Commercial [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count			4
Balance			582
Reduction Of Interest Rate [Member] | Commercial Construction [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	2
Balance	622
Reduction Of Interest Rate [Member] | Land [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	12
Balance	27,004
Reduction Of Interest Rate [Member] | Office [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count			1
Balance			390
Reduction Of Interest Rate [Member] | Industrial [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count			1
Balance			1,384
Reduction Of Interest Rate [Member] | Retail [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	5
Balance	8,633
Reduction Of Interest Rate [Member] | Mixed Use And Other [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	2		1
Balance	1,212		284
Modification To Interest- Only Payments [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	23		7
Balance	33,897		3,448
Modification To Interest- Only Payments [Member] | Residential Real Estate And Other [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	2		1
Balance	844		187
Modification To Interest- Only Payments [Member] | Commercial And Industrial [Member] | Commercial [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	2		4
Balance	104		582
Modification To Interest- Only Payments [Member] | Commercial Construction [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	2
Balance	622
Modification To Interest- Only Payments [Member] | Land [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	11
Balance	22,954
Modification To Interest- Only Payments [Member] | Office [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count			1
Balance			1,295
Modification To Interest- Only Payments [Member] | Industrial [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count			1
Balance			1,384
Modification To Interest- Only Payments [Member] | Retail [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	4
Balance	8,244
Modification To Interest- Only Payments [Member] | Mixed Use And Other [Member] | Commercial Real-Estate [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count	2
Balance	1,129
Forgiveness Of Debt [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count			2
Balance			135
Forgiveness Of Debt [Member] | Commercial And Industrial [Member] | Commercial [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Count			2
Balance			$ 135

[1] Restructured loans may have more than one modification representing a concession. As such, restructured loans during the period may be represented in more than one of the categories noted above.