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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, 2017 | Dec. 31, 2016
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Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment securities available-for-sale, at fair value | $ 389,388 | $ 385,563
Loans held for Sale | 8,583 | 5,517
Derivative financial instruments | 583 | 662
Derivative financial instruments, carrying amount | (32) |
Municipal Obligations Tax Exempt [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment securities available-for-sale, at fair value | 180,571 | 161,662
Municipal Obligations Taxable [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment securities available-for-sale, at fair value | 60,154 | 71,563
Agency mortgage-backed securities [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment securities available-for-sale, at fair value | 113,759 | 108,376
Certificates of deposit [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment securities available-for-sale, at fair value | 9,224 | 9,700
US Treasury Securities [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment securities available-for-sale, at fair value | 5,014 | 6,015
Fair Value, Measurements, Recurring [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Loans held for Sale | 8,583 | 5,517
Derivative financial instruments | 583 | 662
Derivative financial instruments, carrying amount | (32) |
Fair Value, Inputs, Level 1 [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment securities available-for-sale, at fair value | 5,337 | 7,123
Loans held for Sale |  |
Derivative financial instruments |  |
Derivative financial instruments, carrying amount |  |
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Loans held for Sale |  |
Derivative financial instruments |  |
Derivative financial instruments, carrying amount |  |
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | US Federal Agency Obligations [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment securities available-for-sale, at fair value |  |
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Municipal Obligations Tax Exempt [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment securities available-for-sale, at fair value |  |
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Municipal Obligations Taxable [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment securities available-for-sale, at fair value |  |
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Agency mortgage-backed securities [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment securities available-for-sale, at fair value |  |
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Certificates of deposit [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment securities available-for-sale, at fair value |  |
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Common stocks [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment securities available-for-sale, at fair value | 323 | 1,108
Fair Value, Inputs, Level 2 [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment securities available-for-sale, at fair value | 384,051 | 378,440
Loans held for Sale | 8,583 | 5,517
Derivative financial instruments | 583 | 662
Derivative financial instruments, carrying amount | (32) |
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Loans held for Sale | 8,583 | 5,517
Derivative financial instruments | 583 | 662
Derivative financial instruments, carrying amount | (32) |
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | US Federal Agency Obligations [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment securities available-for-sale, at fair value | 20,343 | 27,139
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Municipal Obligations Tax Exempt [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment securities available-for-sale, at fair value | 180,571 | 161,662
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Municipal Obligations Taxable [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment securities available-for-sale, at fair value | 60,154 | 71,563
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Agency mortgage-backed securities [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment securities available-for-sale, at fair value | 113,759 | 108,376
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Certificates of deposit [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment securities available-for-sale, at fair value | 9,224 | 9,700
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Common stocks [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment securities available-for-sale, at fair value |  |
Fair Value, Inputs, Level 3 [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment securities available-for-sale, at fair value |  |
Loans held for Sale |  |
Derivative financial instruments |  |
Derivative financial instruments, carrying amount |  |
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Loans held for Sale |  |
Derivative financial instruments |  |
Derivative financial instruments, carrying amount |  |
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | US Federal Agency Obligations [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment securities available-for-sale, at fair value |  |
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Municipal Obligations Tax Exempt [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment securities available-for-sale, at fair value |  |
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Municipal Obligations Taxable [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment securities available-for-sale, at fair value |  |
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Agency mortgage-backed securities [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment securities available-for-sale, at fair value |  |
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Certificates of deposit [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment securities available-for-sale, at fair value |  |
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Common stocks [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment securities available-for-sale, at fair value |  |
US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment securities available-for-sale, at fair value | 5,014 | 6,015
US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment securities available-for-sale, at fair value |  |
US Treasury Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment securities available-for-sale, at fair value |  |
US Federal Agency Obligations [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment securities available-for-sale, at fair value | 20,343 | 27,139
Municipal Obligations Tax Exempt [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment securities available-for-sale, at fair value | 180,571 | 161,662
Municipal Obligations Taxable [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment securities available-for-sale, at fair value | 60,154 | 71,563
Agency mortgage-backed securities [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment securities available-for-sale, at fair value | 113,759 | 108,376
Certificates of deposit [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment securities available-for-sale, at fair value | 9,224 | 9,700
Common stocks [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment securities available-for-sale, at fair value | $ 323 | $ 1,108

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