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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 | Sep. 30, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Dec. 31, 2016
--- | --- | --- | --- | ---
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Cash and cash equivalents | $ 16,286 | $ 16,584 | $ 18,772 | $ 19,996
Investment securities available-for-sale, at fair value | 376,039 | 387,983 |  |
Bank stocks, at cost | 5,025 | 5,423 |  |
Loans, net | 475,497 | 433,743 |  |
Loans held for sale | 7,728 | 6,535 |  |
Derivative financial instruments | 680 | 395 |  |
Accrued interest receivable | 4,768 | 4,409 |  |
Non-maturity deposits | (620,869) | (642,281) |  |
Time deposits | (146,407) | (123,277) |  |
FHLB borrowings | (60,300) | (31,600) |  |
Subordinated debentures | (21,634) | (21,484) |  |
Other borrowings | (13,793) | (13,509) |  |
Accrued interest payable | (402) | (274) |  |
Level 1 [Member] |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Cash and cash equivalents | 16,286 | 16,584 |  |
Investment securities available-for-sale, at fair value | 1,943 | 1,998 |  |
Bank stocks, at cost |  |  |  |
Loans, net |  |  |  |
Loans held for sale |  |  |  |
Derivative financial instruments |  |  |  |
Accrued interest receivable | 10 | 20 |  |
Non-maturity deposits | (620,869) | (642,281) |  |
Time deposits |  |  |  |
FHLB borrowings |  |  |  |
Subordinated debentures |  |  |  |
Other borrowings |  |  |  |
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, at fair value | 374,096 | 385,985 |  |
Bank stocks, at cost |  |  |  |
Loans, net |  |  |  |
Loans held for sale | 7,728 | 6,535 |  |
Derivative financial instruments | 680 | 395 |  |
Accrued interest receivable | 1,973 | 2,234 |  |
Non-maturity deposits |  |  |  |
Time deposits | (143,979) | (121,298) |  |
FHLB borrowings | (60,304) | (31,706) |  |
Subordinated debentures | (19,541) | (19,134) |  |
Other borrowings | (13,793) | (13,509) |  |
Accrued interest payable | (402) | (274) |  |
Level 3 [Member] |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Cash and cash equivalents |  |  |  |
Investment securities available-for-sale, at fair value |  |  |  |
Bank stocks, at cost |  |  |  |
Loans, net | 481,975 | 436,910 |  |
Loans held for sale |  |  |  |
Derivative financial instruments |  |  |  |
Accrued interest receivable | 2,785 | 2,155 |  |
Non-maturity deposits |  |  |  |
Time deposits |  |  |  |
FHLB borrowings |  |  |  |
Subordinated debentures |  |  |  |
Other borrowings |  |  |  |
Accrued interest payable |  |  |  |
Reported Value Measurement [Member] |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Cash and cash equivalents | 16,286 | 16,584 |  |
Investment securities available-for-sale, at fair value | 376,039 | 387,983 |  |
Bank stocks, at cost |  |  |  |
Loans, net | 481,975 | 436,910 |  |
Loans held for sale | 7,728 | 6,535 |  |
Derivative financial instruments | 680 | 395 |  |
Accrued interest receivable | 4,768 | 4,409 |  |
Non-maturity deposits | (620,869) | (642,281) |  |
Time deposits | (143,979) | (121,298) |  |
FHLB borrowings | (60,304) | (31,706) |  |
Subordinated debentures | (19,541) | (19,134) |  |
Other borrowings | (13,793) | (13,509) |  |
Accrued interest payable | $ (402) | $ (274) |  |

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- Definition 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). + References No definition available. + Details
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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3044-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6676-107765 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Including both current and noncurrent portions, Federal Home Loan Bank borrowings initially due beyond one year or beyond the normal operating cycle if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64702-112823 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 + Details
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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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