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Loans and Allowance for Loan Losses - Loan Summary (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019 | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total loans | $ 2,145,292 | $ 1,903,248 |  |
Less: Allowance for loan losses | (13,431) | (10,243) | $ (8,704) | $ (8,275)
Loans, net | 2,131,861 | 1,893,005 |  |
Purchased Credit Impaired Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total loans | 35,486 | 26,987 |  |
Less: Allowance for loan losses | 0 | (156) |  |
Loans, net | 35,486 | 26,831 |  |
All Other Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total loans | 2,109,806 | 1,876,261 |  |
Less: Allowance for loan losses | (13,431) | (10,087) |  |
Loans, net | 2,096,375 | 1,866,174 |  |
Commercial Real Estate [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total loans | 1,009,035 | 905,306 |  |
Less: Allowance for loan losses | (5,963) | (4,508) | (4,074) | (3,639)
Commercial Real Estate [Member] | Purchased Credit Impaired Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total loans | 16,589 | 15,255 |  |
Less: Allowance for loan losses | 0 | (17) |  |
Commercial Real Estate [Member] | All Other Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total loans | 992,446 | 890,051 |  |
Less: Allowance for loan losses | (5,963) | (4,491) |  |
Consumer Real Estate [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total loans | 488,773 | 423,338 |  |
Less: Allowance for loan losses | (3,301) | (2,576) | (1,949) | (1,789)
Consumer Real Estate [Member] | Purchased Credit Impaired Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total loans | 11,950 | 6,541 |  |
Less: Allowance for loan losses | 0 | (74) |  |
Consumer Real Estate [Member] | All Other Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total loans | 476,823 | 416,797 |  |
Less: Allowance for loan losses | (3,301) | (2,502) |  |
Construction and Land Development [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total loans | 253,445 | 227,626 |  |
Less: Allowance for loan losses | (1,484) | (1,127) | (854) | (795)
Construction and Land Development [Member] | Purchased Credit Impaired Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total loans | 6,479 | 4,458 |  |
Less: Allowance for loan losses | 0 | 0 |  |
Construction and Land Development [Member] | All Other Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total loans | 246,966 | 223,168 |  |
Less: Allowance for loan losses | (1,484) | (1,127) |  |
Commercial and Industrial [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total loans | 377,173 | 337,075 |  |
Less: Allowance for loan losses | (2,557) | (1,957) | (1,709) | (1,746)
Commercial and Industrial [Member] | Purchased Credit Impaired Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total loans | 143 | 407 |  |
Less: Allowance for loan losses | 0 | (59) |  |
Commercial and Industrial [Member] | All Other Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total loans | 377,030 | 336,668 |  |
Less: Allowance for loan losses | (2,557) | (1,898) |  |
Consumer and Other [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total loans | 16,866 | 9,903 |  |
Less: Allowance for loan losses | (126) | (75) | $ (118) | $ (306)
Consumer and Other [Member] | Purchased Credit Impaired Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total loans | 325 | 326 |  |
Less: Allowance for loan losses | 0 | (6) |  |
Consumer and Other [Member] | All Other Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total loans | 16,541 | 9,577 |  |
Less: Allowance for loan losses | $ (126) | $ (69) |  |

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