Fair Value (Assets And Liabilities Measured At Fair Value On A Nonrecurring Basis (Details) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Fair Value, Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Impaired loans carried at fair value, Fair value	$ 89,857	$ 111,257
Mortgage servicing rights	4,963	3,813
Other real estate owned	46,911	44,325
Commercial Real Estate [Member]
Fair Value, Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Impaired loans carried at fair value, Fair value	20,347	32,354
Commercial Real Estate [Member] | Level 1 [Member]
Fair Value, Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Impaired loans carried at fair value, Fair value
Commercial Real Estate [Member] | Level 3 [Member]
Fair Value, Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Impaired loans carried at fair value, Fair value	20,347	32,354
Commercial, Financial And Agricultural [Member]
Fair Value, Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Impaired loans carried at fair value, Fair value	15,620	8,276
Commercial, Financial And Agricultural [Member] | Level 1 [Member]
Fair Value, Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Impaired loans carried at fair value, Fair value
Commercial, Financial And Agricultural [Member] | Level 3 [Member]
Fair Value, Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Impaired loans carried at fair value, Fair value	15,620	8,276
Construction Real Estate - Vision Commercial Land And Development [Member]
Fair Value, Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Impaired loans carried at fair value, Fair value	28,315	45,121
Construction Real Estate - Vision Commercial Land And Development [Member] | Level 1 [Member]
Fair Value, Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Impaired loans carried at fair value, Fair value
Construction Real Estate - Vision Commercial Land And Development [Member] | Level 3 [Member]
Fair Value, Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Impaired loans carried at fair value, Fair value	28,315	45,121
Construction Real Estate - Remaining Commercial [Member]
Fair Value, Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Impaired loans carried at fair value, Fair value	10,353	10,202
Construction Real Estate - Remaining Commercial [Member] | Level 1 [Member]
Fair Value, Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Impaired loans carried at fair value, Fair value
Construction Real Estate - Remaining Commercial [Member] | Level 3 [Member]
Fair Value, Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Impaired loans carried at fair value, Fair value	10,353	10,202
Residential Real Estate Commercial [Member]
Fair Value, Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Impaired loans carried at fair value, Fair value	15,222	15,304
Residential Real Estate Commercial [Member] | Level 1 [Member]
Fair Value, Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Impaired loans carried at fair value, Fair value
Residential Real Estate Commercial [Member] | Level 3 [Member]
Fair Value, Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Impaired loans carried at fair value, Fair value	15,222	15,304
Level 1 [Member]
Fair Value, Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Impaired loans carried at fair value, Fair value
Mortgage servicing rights
Other real estate owned
Level 2 [Member]
Fair Value, Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Mortgage servicing rights	4,963	3,813
Level 3 [Member]
Fair Value, Assets And Liabilities Measured On Nonrecurring Basis [Line Items]
Impaired loans carried at fair value, Fair value	89,857	111,257
Other real estate owned	$ 46,911	$ 44,325