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Fair Value Measurements (Tables) | 12 Months Ended
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Dec. 31, 2020
Fair Value Measurements [Abstract] |
Schedule of Fair Value of Assets and Liabilities Measured on Recurring Basis | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Significant | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Other | ​ | Significant
​ | ​ | ​ | ​ | ​ | Quoted | ​ | Observable | ​ | Unobservable
​ | ​ | ​ | ​ | ​ | Prices | ​ | Inputs | ​ | Inputs
(Dollars in thousands) |  | Fair Value |  | (Level 1) |  | (Level 2) |  | (Level 3)
2020 |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Securities available for sale: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
U.S. Government agencies | ​ | $ | 23,537 | ​ | $ | — | ​ | $ | 23,537 | ​ | $ | —
Mortgage-backed | ​ |  | 116,031 | ​ |  | — | ​ |  | 116,031 | ​ |  | —
​ | ​ |  | 139,568 | ​ |  | — | ​ |  | 139,568 | ​ |  | —
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Equity | ​ |  | 1,395 | ​ |  | — | ​ |  | 1,395 | ​ |  | —
Total | ​ | $ | 140,963 | ​ | $ | — | ​ | $ | 140,963 | ​ | $ | —
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Significant | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Other | ​ | Significant
​ | ​ | ​ | ​ | ​ | Quoted | ​ | Observable | ​ | Unobservable
​ | ​ | ​ | ​ | ​ | Prices | ​ | Inputs | ​ | Inputs
(Dollars in thousands) |  | Fair Value |  | (Level 1) |  | (Level 2) |  | (Level 3)
2019 |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Securities available for sale: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
U.S. Government agencies | ​ | $ | 23,826 | ​ | $ | — | ​ | $ | 23,826 | ​ | $ | —
Mortgage-backed | ​ |  | 98,965 | ​ |  | — | ​ |  | 98,965 | ​ |  | —
​ | ​ |  | 122,791 | ​ |  | — | ​ |  | 122,791 | ​ |  | —
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Equity | ​ |  | 1,342 | ​ |  | — | ​ |  | 1,342 | ​ |  | —
Total | ​ | $ | 124,133 | ​ | $ | — | ​ | $ | 124,133 | ​ | $ | —
Fair Value of Assets Measured on Nonrecurring Basis | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Quantitative Information about Level 3 Fair Value Measurements
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted
(Dollars in thousands) |  | Fair Value |  | Valuation Technique |  | Unobservable Input |  | Range |  | Average (3)
2020 |  | ​ |  |  |  | ​ |  | ​ |  | ​ |
Nonrecurring measurements: |  | ​ |  |  |  | ​ |  | ​ |  | ​ |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Impaired loans | ​ | $ | 610 |  | Appraisal of collateral | (1) | Liquidation expense | (2) | 10% | ​ | (10%)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Impaired loans | ​ | $ | 1,110 |  | Discounted cash flow analysis | (1) | Discount rate | ​ | 6% - 7.25% | ​ | (6%)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Quantitative Information about Level 3 Fair Value Measurements |
(Dollars in thousands) |  | Fair Value |  | Valuation Technique |  | Unobservable Input |  | Range
2019 |  | ​ |  |  |  | ​ |  | ​ | ​
Nonrecurring measurements: |  | ​ |  |  |  | ​ |  | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Impaired loans | ​ | $ | 2,489 |  | Appraisal of collateral | (1) | Liquidation expense | (2) | 10%
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Impaired loans | ​ | $ | 2,599 |  | Discounted cash flow analysis | (1) | Discount rate | ​ | 4% - 7.25%
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Other real estate owned | ​ | $ | 74 |  | Appraisal of collateral | (1) | Appraisal adjustments | (2) | 0% - 31%
​ | ​ |  |  |  |  |  | Liquidation expense | (2) | 10%
(1) | Fair value is generally determined through independent appraisals of the underlying collateral (impaired loans and OREO) or discounted cash flow analyses (impaired loans), which generally include various level III inputs which are not identifiable.
(2) | Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses. The range of liquidation expenses and other appraisal adjustments are presented as a percent of the appraisal.
(3) | Unobservable inputs were weighted by the relative fair value of the instruments.
Schedule of Estimated Fair Values of Financial Assets and Liabilities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 2020 |  | 2019
​ | ​ | ​ | ​ | ​ | Estimated | ​ | ​ | ​ | ​ | Estimated
​ | ​ | Carrying | ​ | Fair | ​ | Carrying | ​ | Fair
(Dollars in thousands) |  | Amount |  | Value |  | Amount |  | Value
Financial assets |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Level 1 inputs |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Cash and cash equivalents | ​ | $ | 186,917 | ​ | $ | 186,917 | ​ | $ | 94,971 | ​ | $ | 94,971
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Level 2 inputs | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Investment securities held to maturity | ​ | $ | 65,706 | ​ | $ | 65,828 | ​ | $ | 8,786 | ​ | $ | 8,654
Restricted securities | ​ |  | 3,626 | ​ |  | 3,626 | ​ |  | 4,190 | ​ |  | 4,190
Cash surrender value on life insurance | ​ |  | 31,018 | ​ |  | 31,018 | ​ |  | 29,782 | ​ |  | 29,782
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Level 3 inputs | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Loans, net | ​ | $ | 1,440,368 | ​ | $ | 1,436,292 | ​ | $ | 1,238,147 | ​ | $ | 1,242,867
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Financial liabilities | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Level 2 inputs | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Deposits: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Noninterest-bearing demand | ​ | $ | 509,091 | ​ | $ | 509,091 | ​ | $ | 356,618 | ​ | $ | 356,618
Checking plus interest | ​ |  | 446,243 | ​ |  | 446,243 | ​ |  | 302,227 | ​ |  | 302,227
Money market | ​ |  | 292,974 | ​ |  | 292,974 | ​ |  | 262,050 | ​ |  | 262,050
Savings | ​ |  | 177,524 | ​ |  | 177,524 | ​ |  | 143,322 | ​ |  | 143,322
Club | ​ |  | 392 | ​ |  | 392 | ​ |  | 387 | ​ |  | 387
Certificates of deposit, $100,000 or more | ​ |  | 129,623 | ​ |  | 131,271 | ​ |  | 127,600 | ​ |  | 128,167
Other time | ​ |  | 144,858 | ​ |  | 146,137 | ​ |  | 149,130 | ​ |  | 149,209
Securities sold under retail repurchase agreement | ​ |  | 1,050 | ​ |  | 1,050 | ​ |  | 1,226 | ​ |  | 1,226
Advances from FHLB - long-term | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 15,000 | ​ |  | 15,040
Subordinated debt | ​ | ​ | 24,429 | ​ | ​ | 25,745 | ​ | ​ | — | ​ |  | —

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- Definition Tabular disclosure of assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). Disclosures may include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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