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Fair Value of Financial Instruments and Fair Value Measurements - Schedule of Fair Value, by Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 19,883	$ 16,584	$ 10,594	$ 19,996
Investment securities available for sale	398,137	387,983
Bank stocks, at cost	6,034	5,423
Loans, net	461,396	433,743
Loans held for sale net	11,764	6,535
Derivative financial instruments	695	395
Accrued interest receivable	4,459	4,409
Non-maturity deposits	(642,106)	(642,281)
Time deposits	(123,185)	(123,277)
FHLB borrowings	(85,600)	(31,600)
Subordinated debentures	(21,584)	(21,484)
Other borrowings	(8,417)	(13,509)
Derivative financial instruments	(97)	(274)
Accrued interest payable	(349)	(274)
Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	19,883	16,584
Investment securities available for sale	1,952	1,998
Bank stocks, at cost
Loans, net
Loans held for sale net
Derivative financial instruments
Accrued interest receivable	20	20
Non-maturity deposits	(642,106)	(642,281)
Time deposits
FHLB borrowings
Subordinated debentures
Other borrowings
Derivative financial instruments
Accrued interest payable
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents
Investment securities available for sale	396,185	385,985
Bank stocks, at cost
Loans, net
Loans held for sale net	11,764	6,535
Derivative financial instruments	695	395
Accrued interest receivable	2,279	2,234
Non-maturity deposits
Time deposits	(120,775)	(121,298)
FHLB borrowings	(85,613)	(31,706)
Subordinated debentures	(19,522)	(19,134)
Other borrowings	(8,417)	(13,509)
Derivative financial instruments	(97)	(274)
Accrued interest payable	(349)	(274)
Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents
Investment securities available for sale
Bank stocks, at cost
Loans, net	480,331	436,910
Loans held for sale net
Derivative financial instruments
Accrued interest receivable	2,160	2,155
Non-maturity deposits
Time deposits
FHLB borrowings
Subordinated debentures
Other borrowings
Derivative financial instruments
Accrued interest payable
Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	19,883	16,584
Investment securities available for sale	398,137	387,983
Bank stocks, at cost
Loans, net	480,331	436,910
Loans held for sale net	11,764	6,535
Derivative financial instruments	695	395
Accrued interest receivable	4,459	4,409
Non-maturity deposits	(642,106)	(642,281)
Time deposits	(120,775)	(121,298)
FHLB borrowings	(85,613)	(31,706)
Subordinated debentures	(19,522)	(19,134)
Other borrowings	(8,417)	(13,509)
Derivative financial instruments	(97)	(274)
Accrued interest payable	$ (349)	$ (274)

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Other Securities includes Federal Home Loan Bank (FHLB) and Federal Reserve Bank. FHLB Stock represents an equity interest in a FHLB. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity) and Federal Reserve Bank stock represents an equity interest in the Federal Reserve Bank. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity).

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Fair value of the assets less the liabilities of a derivative or group of derivatives.

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Including both current and noncurrent portions, Federal Home Loan Bank borrowings initially due beyond one year or beyond the normal operating cycle if longer.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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