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FHLB Advances and Other Borrowings (Narrative) (Details) - USD ($) |  |  | 12 Months Ended
--- | --- | --- | ---
Jul. 01, 2019 | Jun. 25, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Debt Instrument [Line Items] |  |  |  |  |
FHLB advances, convertible from fixed to adjustable rate |  |  | $ 0 | $ 0 |
Repayments of term loans |  |  | 40,625,000 | 65,171,000 | $ 40,155,000
Line of credit, maximum borrowing capacity |  |  | 15,000,000 |  |
Line of credit, outstanding balance |  |  | $ 0 |  |
Line of credit, unused capacity, commitment fee percentage |  |  | 0.30% |  |
Junior subordinated debt for Tier 1 capital purposes |  |  | $ 15,764,000 | $ 15,447,000 |
LIBOR |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Variable rate |  |  | 2.25% |  |
Minimum |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Interest rate on FHLB advances |  |  | 1.54% | 1.54% |
Maximum |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Interest rate on FHLB advances |  |  | 2.23% | 7.22% |
Weighted Average |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Interest rate on FHLB advances |  |  | 1.87% | 1.95% |
Parent Company |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Repayments of term loans |  | $ 25,000,000.0 | $ 0 | $ 25,000,000 | $ 0
Subordinated Debt | 4.50% Fixed-to-Floating Rate Subordinated Notes due 2029 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt sold and issued |  | $ 40,000,000.0 |  |  |
Debt interest rate |  | 4.50% |  |  |
Proceeds from debt offering |  | $ 15,000,000.0 |  |  |
Subordinated Debt | 4.50% Fixed Rate Notes due 2024 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt interest rate |  | 4.50% |  |  |
Debt term |  | 10 years |  |  |
Subordinated Debt | 4.50% Fixed Rate Notes due 2024 | LIBOR |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Variable rate |  | 2.68% |  |  |
Subordinated Debt | 4.50% Fixed Rate Notes due 2024 | Minimum | LIBOR |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Variable rate |  | 0.00% |  |  |
Subordinated Debt | 4.50% Fixed Rate Notes due 2024 | Maximum | LIBOR |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Variable rate |  | 0.00% |  |  |
Citizens First |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Cash consideration paid for acquisition | $ 15,500,000 | $ 15,500,000 |  |  |

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- Definition Discloses the single interest rate [if] applicable to the advances from the Federal Home Loan Bank, by branch, as of the Balance Sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 Reference 2: 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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