Fair Value Measurements (Recurring Basis) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Summary of assets measured at fair value on a recurring basis
Available-for-sale, at fair value	$ 553,731	$ 748,864
US Treasury Securities [Member]
Summary of assets measured at fair value on a recurring basis
Available-for-sale, at fair value	5,765	8,259
Government sponsored agencies [Member]
Summary of assets measured at fair value on a recurring basis
Available-for-sale, at fair value	194,989	263,503
State and political subdivisions [Member]
Summary of assets measured at fair value on a recurring basis
Available-for-sale, at fair value	15,120	46,227
Residential mortgage-backed securities [Member]
Summary of assets measured at fair value on a recurring basis
Available-for-sale, at fair value	187,768	239,807
Collateralized mortgage obligations [Member]
Summary of assets measured at fair value on a recurring basis
Available-for-sale, at fair value	132,230	144,383
Corporate bonds [Member]
Summary of assets measured at fair value on a recurring basis
Available-for-sale, at fair value	14,627	45,095
Preferred stock [Member]
Summary of assets measured at fair value on a recurring basis
Available-for-sale, at fair value	3,232	1,590
Fair Value Measurements Recurring [Member]
Summary of assets measured at fair value on a recurring basis
Available-for-sale, at fair value	553,731	748,864
Loans held-for-sale	10,327	9,128
Total assets measured at fair value on a recurring basis	564,058	757,992
Fair Value Measurements Recurring [Member] | Quoted Prices In Active Markets for Identical Assets (Level 1) [Member]
Summary of assets measured at fair value on a recurring basis
Available-for-sale, at fair value	5,765	8,259
Loans held-for-sale	0	0
Total assets measured at fair value on a recurring basis	5,765	8,259
Fair Value Measurements Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Summary of assets measured at fair value on a recurring basis
Available-for-sale, at fair value	547,966	740,605
Loans held-for-sale	10,327	9,128
Total assets measured at fair value on a recurring basis	558,293	749,733
Fair Value Measurements Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Summary of assets measured at fair value on a recurring basis
Available-for-sale, at fair value	0	0
Loans held-for-sale	0	0
Total assets measured at fair value on a recurring basis	0	0
Fair Value Measurements Recurring [Member] | US Treasury Securities [Member]
Summary of assets measured at fair value on a recurring basis
Available-for-sale, at fair value	5,765
Fair Value Measurements Recurring [Member] | US Treasury Securities [Member] | Quoted Prices In Active Markets for Identical Assets (Level 1) [Member]
Summary of assets measured at fair value on a recurring basis
Available-for-sale, at fair value	5,765
Fair Value Measurements Recurring [Member] | US Treasury Securities [Member] | Significant Other Observable Inputs (Level 2) [Member]
Summary of assets measured at fair value on a recurring basis
Available-for-sale, at fair value	0
Fair Value Measurements Recurring [Member] | US Treasury Securities [Member] | Significant Unobservable Inputs (Level 3) [Member]
Summary of assets measured at fair value on a recurring basis
Available-for-sale, at fair value	0
Fair Value Measurements Recurring [Member] | Government sponsored agencies [Member]
Summary of assets measured at fair value on a recurring basis
Available-for-sale, at fair value	194,989	263,503
Fair Value Measurements Recurring [Member] | 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
Available-for-sale, at fair value	0	0
Fair Value Measurements Recurring [Member] | Government sponsored agencies [Member] | Significant Other Observable Inputs (Level 2) [Member]
Summary of assets measured at fair value on a recurring basis
Available-for-sale, at fair value	194,989	263,503
Fair Value Measurements Recurring [Member] | Government sponsored agencies [Member] | Significant Unobservable Inputs (Level 3) [Member]
Summary of assets measured at fair value on a recurring basis
Available-for-sale, at fair value	0	0
Fair Value Measurements Recurring [Member] | State and political subdivisions [Member]
Summary of assets measured at fair value on a recurring basis
Available-for-sale, at fair value	15,120	46,227
Fair Value Measurements Recurring [Member] | 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
Available-for-sale, at fair value	0	0
Fair Value Measurements Recurring [Member] | State and political subdivisions [Member] | Significant Other Observable Inputs (Level 2) [Member]
Summary of assets measured at fair value on a recurring basis
Available-for-sale, at fair value	15,120	46,227
Fair Value Measurements Recurring [Member] | State and political subdivisions [Member] | Significant Unobservable Inputs (Level 3) [Member]
Summary of assets measured at fair value on a recurring basis
Available-for-sale, at fair value	0	0
Fair Value Measurements Recurring [Member] | Residential mortgage-backed securities [Member]
Summary of assets measured at fair value on a recurring basis
Available-for-sale, at fair value	187,768	239,807
Fair Value Measurements Recurring [Member] | 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
Available-for-sale, at fair value	0	0
Fair Value Measurements Recurring [Member] | Residential mortgage-backed securities [Member] | Significant Other Observable Inputs (Level 2) [Member]
Summary of assets measured at fair value on a recurring basis
Available-for-sale, at fair value	187,768	239,807
Fair Value Measurements Recurring [Member] | Residential mortgage-backed securities [Member] | Significant Unobservable Inputs (Level 3) [Member]
Summary of assets measured at fair value on a recurring basis
Available-for-sale, at fair value	0	0
Fair Value Measurements Recurring [Member] | Collateralized mortgage obligations [Member]
Summary of assets measured at fair value on a recurring basis
Available-for-sale, at fair value	132,230	144,383
Fair Value Measurements Recurring [Member] | 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
Available-for-sale, at fair value	0	0
Fair Value Measurements Recurring [Member] | Collateralized mortgage obligations [Member] | Significant Other Observable Inputs (Level 2) [Member]
Summary of assets measured at fair value on a recurring basis
Available-for-sale, at fair value	132,230	144,383
Fair Value Measurements Recurring [Member] | Collateralized mortgage obligations [Member] | Significant Unobservable Inputs (Level 3) [Member]
Summary of assets measured at fair value on a recurring basis
Available-for-sale, at fair value	0	0
Fair Value Measurements Recurring [Member] | Corporate bonds [Member]
Summary of assets measured at fair value on a recurring basis
Available-for-sale, at fair value	14,627	45,095
Fair Value Measurements Recurring [Member] | 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
Available-for-sale, at fair value	0	0
Fair Value Measurements Recurring [Member] | Corporate bonds [Member] | Significant Other Observable Inputs (Level 2) [Member]
Summary of assets measured at fair value on a recurring basis
Available-for-sale, at fair value	14,627	45,095
Fair Value Measurements Recurring [Member] | Corporate bonds [Member] | Significant Unobservable Inputs (Level 3) [Member]
Summary of assets measured at fair value on a recurring basis
Available-for-sale, at fair value	0	0
Fair Value Measurements Recurring [Member] | Preferred stock [Member]
Summary of assets measured at fair value on a recurring basis
Available-for-sale, at fair value	3,232	1,590
Fair Value Measurements Recurring [Member] | 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
Available-for-sale, at fair value	0	0
Fair Value Measurements Recurring [Member] | Preferred stock [Member] | Significant Other Observable Inputs (Level 2) [Member]
Summary of assets measured at fair value on a recurring basis
Available-for-sale, at fair value	3,232	1,590
Fair Value Measurements Recurring [Member] | Preferred stock [Member] | Significant Unobservable Inputs (Level 3) [Member]
Summary of assets measured at fair value on a recurring basis
Available-for-sale, at fair value	$ 0	$ 0