Fair Value (Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Loans Held-for-Sale	$ 19,156	$ 4,263
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities	849,445	812,611
Loans Held-for-Sale	19,156	4,263
Derivative Assets	3,985	1,713
Derivative Liabilities	4,353	1,734
Fair Value, Measurements, Recurring | Obligations of State and Political Subdivisions
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities	317,472	294,533
Fair Value, Measurements, Recurring | MBS/CMO - Residential
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities	531,973	518,078
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 - Residential
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	845,415	807,620
Loans Held-for-Sale	19,156	4,263
Derivative Assets	3,985	1,713
Derivative Liabilities	4,353	1,734
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	313,442	289,542
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | MBS/CMO - Residential
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities	531,973	518,078
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities	4,030	4,991
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	4,030	4,991
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | MBS/CMO - Residential
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities	$ 0	$ 0