Fair Value (Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Mortgage loans held for sale	$ 11,110	$ 11,535
Mortgage IRLCs	169	251
Level 2 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Mortgage loans held for sale	11,110	11,535
Mortgage IRLCs	169	251
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	597,475	371,657
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	597,475	371,657
Obligations Of States And Political Subdivisions [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Investment securities	2,655	2,660
Obligations Of States And Political Subdivisions [Member] | Level 2 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Investment securities	2,655	2,660
U.S. Government Sponsored Entities' Asset-Backed Securities [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Investment securities	405,178	444,295
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	405,178	444,295
Equity Securities [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Investment securities	2,173	2,033
Equity Securities [Member] | Level 1 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Investment securities	1,417	1,270
Equity Securities [Member] | Level 3 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Investment securities	756	763
Interest Rate Swap [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Swap	673	846
Interest Rate Swap [Member] | Level 2 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Swap	673	846
Fair Value Swap [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Swap	135	700
Fair Value Swap [Member] | Level 3 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Swap	$ 135	$ 700