Fair Value (Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2011	Dec. 31, 2010
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Mortgage loans held for sale, Fair value	$ 10,778	$ 8,340
Mortgage IRLCs	378	166
Level 2 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Mortgage loans held for sale, Fair value	10,778	8,340
Mortgage IRLCs	378	166
Obligations Of U.S. Treasury And Other U.S. Government Sponsored Entities [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Investment securities	224,817	273,313
Obligations Of U.S. Treasury And Other U.S. Government Sponsored Entities [Member] | Level 2 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Investment securities	224,817	273,313
Obligations Of States And Political Subdivisions [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Investment securities	3,724	11,044
Obligations Of States And Political Subdivisions [Member] | Level 2 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Investment securities	3,724	8,446
Obligations Of States And Political Subdivisions [Member] | Level 3 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Investment securities		2,598
U.S. Government Sponsored Entities' Asset-Backed Securities [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Investment securities	566,748	1,011,412
U.S. Government Sponsored Entities' Asset-Backed Securities [Member] | Level 2 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Investment securities	566,748	1,011,412
Equity Securities [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Investment securities	1,874	1,753
Equity Securities [Member] | Level 1 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Investment securities	1,125	1,008
Equity Securities [Member] | Level 3 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Investment securities	749	745
Interest Rate Swap [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Swap, Fair value	1,099	1,634
Interest Rate Swap [Member] | Level 2 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Swap, Fair value	1,099	1,634
Fair Value Swap [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Swap, Fair value	200	60
Fair Value Swap [Member] | Level 3 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Swap, Fair value	$ 200	$ 60