Fair Value (Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Loans Held-for-Sale	$ 18,493	$ 16,904
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities	1,385,873	1,217,852
Loans Held-for-Sale	18,493	16,904
Derivative Assets	5,772	8,806
Derivative Liabilities	5,970	9,353
Fair Value, Measurements, Recurring | Obligations of State and Political Subdivisions
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities	623,848	581,247
Fair Value, Measurements, Recurring | MBS/CMO
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities	653,449	548,307
Fair Value, Measurements, Recurring | US Gov't Sponsored Entities & Agencies
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities	108,576	88,298
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	1,385,873	1,217,355
Loans Held-for-Sale	18,493	16,904
Derivative Assets	5,772	8,806
Derivative Liabilities	5,970	9,353
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	623,848	580,750
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | MBS/CMO
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities	653,449	548,307
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	108,576	88,298
Fair Value, Measurements, Recurring | Significant Unobservable  Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities	0	497
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
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