Fair Value Measurements (Recurring Basis) (Details) (Fair Value Measurements Recurring [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Summary of assets measured at fair value on a recurring basis
Total investment securities-available-for-sale	$ 582,054	$ 667,276
Loans held-for-sale	17,665
Total assets measured at fair value on a recurring basis	599,719
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member]
Summary of assets measured at fair value on a recurring basis
Total investment securities-available-for-sale	0	0
Loans held-for-sale	0
Total assets measured at fair value on a recurring basis	0
Significant Other Observable Inputs (Level 2) [Member]
Summary of assets measured at fair value on a recurring basis
Total investment securities-available-for-sale	582,054	667,276
Loans held-for-sale	17,665
Total assets measured at fair value on a recurring basis	599,719
Significant Unobservable Inputs (Level 3) [Member]
Summary of assets measured at fair value on a recurring basis
Total investment securities-available-for-sale	0	0
Loans held-for-sale	0
Total assets measured at fair value on a recurring basis	0
Government sponsored agencies [Member]
Summary of assets measured at fair value on a recurring basis
Total investment securities-available-for-sale	97,557	70,679
Government sponsored agencies [Member] | Quoted Prices In Active Markets for Identical Assets (Level 1) [Member]
Summary of assets measured at fair value on a recurring basis
Total investment securities-available-for-sale	0	0
Government sponsored agencies [Member] | Significant Other Observable Inputs (Level 2) [Member]
Summary of assets measured at fair value on a recurring basis
Total investment securities-available-for-sale	97,557	70,679
Government sponsored agencies [Member] | Significant Unobservable Inputs (Level 3) [Member]
Summary of assets measured at fair value on a recurring basis
Total investment securities-available-for-sale	0	0
State and political subdivisions [Member]
Summary of assets measured at fair value on a recurring basis
Total investment securities-available-for-sale	49,965	45,235
State and political subdivisions [Member] | Quoted Prices In Active Markets for Identical Assets (Level 1) [Member]
Summary of assets measured at fair value on a recurring basis
Total investment securities-available-for-sale	0	0
State and political subdivisions [Member] | Significant Other Observable Inputs (Level 2) [Member]
Summary of assets measured at fair value on a recurring basis
Total investment securities-available-for-sale	49,965	45,235
State and political subdivisions [Member] | Significant Unobservable Inputs (Level 3) [Member]
Summary of assets measured at fair value on a recurring basis
Total investment securities-available-for-sale	0	0
Residential mortgage-backed securities [Member]
Summary of assets measured at fair value on a recurring basis
Total investment securities-available-for-sale	99,411	120,780
Residential mortgage-backed securities [Member] | Quoted Prices In Active Markets for Identical Assets (Level 1) [Member]
Summary of assets measured at fair value on a recurring basis
Total investment securities-available-for-sale	0	0
Residential mortgage-backed securities [Member] | Significant Other Observable Inputs (Level 2) [Member]
Summary of assets measured at fair value on a recurring basis
Total investment securities-available-for-sale	99,411	120,780
Residential mortgage-backed securities [Member] | Significant Unobservable Inputs (Level 3) [Member]
Summary of assets measured at fair value on a recurring basis
Total investment securities-available-for-sale	0	0
Collateralized mortgage obligations [Member]
Summary of assets measured at fair value on a recurring basis
Total investment securities-available-for-sale	263,592	332,400
Collateralized mortgage obligations [Member] | Quoted Prices In Active Markets for Identical Assets (Level 1) [Member]
Summary of assets measured at fair value on a recurring basis
Total investment securities-available-for-sale	0	0
Collateralized mortgage obligations [Member] | Significant Other Observable Inputs (Level 2) [Member]
Summary of assets measured at fair value on a recurring basis
Total investment securities-available-for-sale	263,592	332,400
Collateralized mortgage obligations [Member] | Significant Unobservable Inputs (Level 3) [Member]
Summary of assets measured at fair value on a recurring basis
Total investment securities-available-for-sale	0	0
Corporate bonds [Member]
Summary of assets measured at fair value on a recurring basis
Total investment securities-available-for-sale	69,795	96,768
Corporate bonds [Member] | Quoted Prices In Active Markets for Identical Assets (Level 1) [Member]
Summary of assets measured at fair value on a recurring basis
Total investment securities-available-for-sale	0	0
Corporate bonds [Member] | Significant Other Observable Inputs (Level 2) [Member]
Summary of assets measured at fair value on a recurring basis
Total investment securities-available-for-sale	69,795	96,768
Corporate bonds [Member] | Significant Unobservable Inputs (Level 3) [Member]
Summary of assets measured at fair value on a recurring basis
Total investment securities-available-for-sale	0	0
Preferred stock [Member]
Summary of assets measured at fair value on a recurring basis
Total investment securities-available-for-sale	1,734	1,414
Preferred stock [Member] | Quoted Prices In Active Markets for Identical Assets (Level 1) [Member]
Summary of assets measured at fair value on a recurring basis
Total investment securities-available-for-sale	0	0
Preferred stock [Member] | Significant Other Observable Inputs (Level 2) [Member]
Summary of assets measured at fair value on a recurring basis
Total investment securities-available-for-sale	1,734	1,414
Preferred stock [Member] | Significant Unobservable Inputs (Level 3) [Member]
Summary of assets measured at fair value on a recurring basis
Total investment securities-available-for-sale	$ 0	$ 0