Fair Value (Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Loans Held-for-Sale	$ 15,361,000	$ 16,904,000
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities	1,696,225,000	1,217,852,000
Loans Held-for-Sale	15,361,000	16,904,000
Derivative Assets	5,741,000	8,806,000
Derivative Liabilities	5,997,000	9,353,000
Fair Value, Measurements, Recurring | Obligations of State and Political Subdivisions
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities	833,453,000	581,247,000
Fair Value, Measurements, Recurring | MBS/CMO
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities	726,632,000	548,307,000
Fair Value, Measurements, Recurring | US Gov't Sponsored Entities & Agencies
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities	136,140,000	88,298,000
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities	0	0
Loans Held-for-Sale	0	0
Derivative Assets	0	0
Derivative Liabilities	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Obligations of State and Political Subdivisions
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | MBS/CMO
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | US Gov't Sponsored Entities & Agencies
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities	0	0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities	1,696,225,000	1,217,355,000
Loans Held-for-Sale	15,361,000	16,904,000
Derivative Assets	5,741,000	8,806,000
Derivative Liabilities	5,997,000	9,353,000
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Obligations of State and Political Subdivisions
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities	833,453,000	580,750,000
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | MBS/CMO
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities	726,632,000	548,307,000
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | US Gov't Sponsored Entities & Agencies
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities	136,140,000	88,298,000
Fair Value, Measurements, Recurring | Significant Unobservable  Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities	0	497,000
Loans Held-for-Sale	0	0
Derivative Assets	0	0
Derivative Liabilities	0	0
Fair Value, Measurements, Recurring | Significant Unobservable  Inputs (Level 3) | Obligations of State and Political Subdivisions
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities	0	497,000
Fair Value, Measurements, Recurring | Significant Unobservable  Inputs (Level 3) | MBS/CMO
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities	0	0
Fair Value, Measurements, Recurring | Significant Unobservable  Inputs (Level 3) | US Gov't Sponsored Entities & Agencies
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities	$ 0	$ 0