Fair Value (Recurring Basis) (Details) (Recurring, USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Securities available for sale	$ 377,670	$ 320,774
Total assets	378,246	321,043
Total liabilities	2,653	2,125
Interest rate swap
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Derivative liabilities	2,349	1,834
Mortgage derivative
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Derivative assets	576	269
Derivative liabilities	304	291
U.S Government sponsored entities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Securities available for sale	79,269	58,792
Mortgage-backed investments
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Securities available for sale	221,589	203,686
Obligations of states and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Securities available for sale	63,180	54,142
Collateralized debt obligations
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Securities available for sale	850	819
Other debt securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Securities available for sale	12,782	3,335
Quoted Prices In Active Markets For Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Securities available for sale	0	0
Total assets	0	0
Total liabilities	0	0
Quoted Prices In Active Markets For Identical Assets (Level 1) | Interest rate swap
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Derivative liabilities	0	0
Quoted Prices In Active Markets For Identical Assets (Level 1) | Mortgage derivative
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Derivative assets	0	0
Derivative liabilities	0	0
Quoted Prices In Active Markets For Identical Assets (Level 1) | U.S Government sponsored entities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Securities available for sale	0	0
Quoted Prices In Active Markets For Identical Assets (Level 1) | Mortgage-backed investments
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Securities available for sale	0	0
Quoted Prices In Active Markets For Identical Assets (Level 1) | Obligations of states and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Securities available for sale	0	0
Quoted Prices In Active Markets For Identical Assets (Level 1) | Collateralized debt obligations
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Securities available for sale	0	0
Quoted Prices In Active Markets For Identical Assets (Level 1) | Other debt securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Securities available for sale	0	0
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Securities available for sale	376,820	319,955
Total assets	376,820	319,955
Total liabilities	0	0
Significant Other Observable Inputs (Level 2) | Interest rate swap
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Derivative liabilities	0	0
Significant Other Observable Inputs (Level 2) | Mortgage derivative
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Derivative assets	0	0
Derivative liabilities	0	0
Significant Other Observable Inputs (Level 2) | U.S Government sponsored entities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Securities available for sale	79,269	58,792
Significant Other Observable Inputs (Level 2) | Mortgage-backed investments
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Securities available for sale	223,560	203,686
Significant Other Observable Inputs (Level 2) | Obligations of states and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Securities available for sale	63,180	54,142
Significant Other Observable Inputs (Level 2) | Collateralized debt obligations
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Securities available for sale	0	0
Significant Other Observable Inputs (Level 2) | Other debt securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Securities available for sale	10,811	3,335
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Securities available for sale	850	819
Total assets	1,426	1,088
Total liabilities	2,653	2,125
Significant Unobservable Inputs (Level 3) | Interest rate swap
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Derivative liabilities	2,349	1,834
Significant Unobservable Inputs (Level 3) | Mortgage derivative
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Derivative assets	576	269
Derivative liabilities	304	291
Significant Unobservable Inputs (Level 3) | U.S Government sponsored entities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Securities available for sale	0	0
Significant Unobservable Inputs (Level 3) | Mortgage-backed investments
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Securities available for sale	0	0
Significant Unobservable Inputs (Level 3) | Obligations of states and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Securities available for sale	0	0
Significant Unobservable Inputs (Level 3) | Collateralized debt obligations
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Securities available for sale	850	819
Significant Unobservable Inputs (Level 3) | Other debt securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Securities available for sale	$ 0	$ 0