Fair Value (Assets And Liabilities Measured At Fair Value On A Nonrecurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Fair Value, Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Impaired loans	$ 83,324	$ 87,813
Mortgage servicing rights	7,138	5,815
Other real estate owned	41,965	42,272
Level 2 [Member]
Fair Value, Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Mortgage servicing rights	7,138	5,815
Level 3 [Member]
Fair Value, Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Impaired loans	83,324	87,813
Other real estate owned	41,965	42,272
Commercial, Financial And Agricultural [Member]
Fair Value, Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Impaired loans	18,476	19,931
Commercial, Financial And Agricultural [Member] | Level 3 [Member]
Fair Value, Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Impaired loans	18,476	19,931
Construction Real Estate - Vision/SE LLC Commercial Land And Development [Member]
Fair Value, Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Impaired loans	18,468	21,228
Construction Real Estate - Vision/SE LLC Commercial Land And Development [Member] | Level 3 [Member]
Fair Value, Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Impaired loans	18,468	21,228
Construction Real Estate - Remaining Commercial [Member]
Fair Value, Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Impaired loans	8,665	8,860
Construction Real Estate - Remaining Commercial [Member] | Level 3 [Member]
Fair Value, Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Impaired loans	8,665	8,860
Residential Real Estate Commercial [Member]
Fair Value, Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Impaired loans	12,270	12,935
Residential Real Estate Commercial [Member] | Level 3 [Member]
Fair Value, Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Impaired loans	12,270	12,935
Commercial Real Estate [Member]
Fair Value, Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Impaired loans	25,445	24,859
Commercial Real Estate [Member] | Level 3 [Member]
Fair Value, Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Impaired loans	$ 25,445	$ 24,859