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Fair Value of Financial Instruments and Fair Value Measurements - Schedule of Fair Value, Assets Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	$ 376,039	$ 387,983
Loans held for Sale	7,728	6,535
Assets: Derivative financial instruments	680	395
Municipal Obligations, Tax Exempt [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	157,257	184,738
Municipal Obligations, Taxable [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	52,991	57,976
Agency Mortgage-backed Securities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	140,979	117,555
Certificates of Deposit [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	7,780	9,224
Common Stocks [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale		8
Level 1 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	1,943	1,998
Assets: Derivative financial instruments
Level 2 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	374,096	385,985
Assets: Derivative financial instruments	680	395
Level 3 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale
Assets: Derivative financial instruments
Fair Value, Measurements, Recurring [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for Sale	7,728	6,535
Assets: Derivative financial instruments	680	395
Fair Value, Measurements, Recurring [Member] | Municipal Obligations, Tax Exempt [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	157,257	184,738
Fair Value, Measurements, Recurring [Member] | Municipal Obligations, Taxable [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	52,991	57,976
Fair Value, Measurements, Recurring [Member] | Agency Mortgage-backed Securities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	140,979	117,555
Fair Value, Measurements, Recurring [Member] | Certificates of Deposit [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	7,780	9,224
Fair Value, Measurements, Recurring [Member] | Common Stocks [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale		8
Fair Value, Measurements, Recurring [Member] | US Federal Agency Obligations [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	15,089	16,492
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for Sale
Assets: Derivative financial instruments
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Municipal Obligations, Tax Exempt [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Municipal Obligations, Taxable [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Agency Mortgage-backed Securities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Certificates of Deposit [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Common Stocks [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale		8
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | US Federal Agency Obligations [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for Sale	7,728	6,535
Assets: Derivative financial instruments	680	395
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Municipal Obligations, Tax Exempt [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	157,257	184,738
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Municipal Obligations, Taxable [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	52,991	57,976
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Agency Mortgage-backed Securities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	140,979	117,555
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Certificates of Deposit [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	7,780	9,224
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Common Stocks [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | US Federal Agency Obligations [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	15,089	16,492
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for Sale
Assets: Derivative financial instruments
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Municipal Obligations, Tax Exempt [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Municipal Obligations, Taxable [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Agency Mortgage-backed Securities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Certificates of Deposit [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Common Stocks [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | US Federal Agency Obligations [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale
Fair Value, Measurements, Recurring [Member] | US Treasury Securities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	1,943	1,990
Fair Value, Measurements, Recurring [Member] | US Treasury Securities [Member] | Level 1 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale	1,943	1,990
Fair Value, Measurements, Recurring [Member] | US Treasury Securities [Member] | Level 2 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale
Fair Value, Measurements, Recurring [Member] | US Treasury Securities [Member] | Level 3 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment securities available for sale

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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