Loans (Schedule Of Troubled Debt Restructuring By Type Of Concession And Type Of Loans) (Details) (USD $)	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Accruing TDRs [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings, Principal Deferral	$ 31,518,000	$ 21,127,000
Troubled Debt Restructurings, Rate Reduction	49,798,000	89,790,000
Troubled Debt Restructurings, Rate Reduction and Forgiveness of Principal	2,071,000	3,459,000
Troubled Debt Restructurings, Rate Reduction and Payment Deferral	36,629,000	22,424,000
Troubled Debt Restructurings, Total	120,016,000	136,800,000	54,992,000
Non-Accrual TDRs [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings, Principal Deferral	26,349,000	22,193,000
Troubled Debt Restructurings, Interest Deferral	2,944,000	1,579,000
Troubled Debt Restructurings, Rate Reduction	14,684,000	2,310,000
Troubled Debt Restructurings, Rate Reduction and Forgiveness of Principal	1,506,000
Troubled Debt Restructurings, Rate Reduction and Payment Deferral	5,387,000	2,064,000
Troubled Debt Restructurings, Total	50,870,000	28,146,000	41,609,000
Commercial Loans [Member] | Accruing TDRs [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings, Principal Deferral	12,933,000	1,131,000
Troubled Debt Restructurings, Rate Reduction	1,756,000	1,780,000
Troubled Debt Restructurings, Rate Reduction and Payment Deferral	431,000	1,114,000
Troubled Debt Restructurings, Total	15,120,000	4,025,000
Commercial Loans [Member] | Non-Accrual TDRs [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings, Principal Deferral	616,000
Troubled Debt Restructurings, Rate Reduction	1,859,000
Troubled Debt Restructurings, Rate Reduction and Forgiveness of Principal	1,506,000
Troubled Debt Restructurings, Total	3,981,000
Real Estate Construction Loans [Member] | Accruing TDRs [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings, Principal Deferral	16,820,000
Troubled Debt Restructurings, Rate Reduction	9,659,000
Troubled Debt Restructurings, Rate Reduction and Payment Deferral	5,776,000
Troubled Debt Restructurings, Total	32,255,000
Real Estate Construction Loans [Member] | Non-Accrual TDRs [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings, Principal Deferral	13,579,000
Troubled Debt Restructurings, Rate Reduction	12,376,000
Troubled Debt Restructurings, Total	25,955,000
Commercial Mortgage Loans [Member] | Accruing TDRs [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings, Principal Deferral	471,000	17,338,000
Troubled Debt Restructurings, Rate Reduction	37,796,000	87,411,000
Troubled Debt Restructurings, Rate Reduction and Forgiveness of Principal	2,071,000	3,459,000
Troubled Debt Restructurings, Rate Reduction and Payment Deferral	28,935,000	20,831,000
Troubled Debt Restructurings, Total	69,273,000	129,039,000
Commercial Mortgage Loans [Member] | Non-Accrual TDRs [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings, Principal Deferral	9,727,000	21,156,000
Troubled Debt Restructurings, Interest Deferral	2,633,000	1,239,000
Troubled Debt Restructurings, Rate Reduction		2,310,000
Troubled Debt Restructurings, Rate Reduction and Payment Deferral	5,076,000	1,113,000
Troubled Debt Restructurings, Total	17,436,000	25,818,000
Residential Mortgage Loans [Member] | Accruing TDRs [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings, Principal Deferral	1,294,000	2,658,000
Troubled Debt Restructurings, Rate Reduction	587,000	599,000
Troubled Debt Restructurings, Rate Reduction and Payment Deferral	1,487,000	479,000
Troubled Debt Restructurings, Total	3,368,000	3,736,000
Residential Mortgage Loans [Member] | Non-Accrual TDRs [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings, Principal Deferral	2,427,000	1,037,000
Troubled Debt Restructurings, Interest Deferral	311,000	340,000
Troubled Debt Restructurings, Rate Reduction	449,000
Troubled Debt Restructurings, Rate Reduction and Payment Deferral	311,000	951,000
Troubled Debt Restructurings, Total	$ 3,498,000	$ 2,328,000