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Loans and Allowance for Loan Losses - Outstanding and Aging Analysis (Details) - USD ($) | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | $ 2,107,991,000 | $ 1,843,286,000
Deferred loan fees | (5,100,000) | 983,000
Unaccreted purchase discounts on non-PCI loans | 878,000 | 983,000
Loans past due more than 90 days still accruing | 0 | 0
SBA PPP |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Deferred loan fees | 6,500,000 |
Commercial loans | Commercial and industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 512,973,000 | 246,687,000
Commercial loans | Commercial and industrial | SBA PPP |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 301,700,000 |
Commercial real estate loans | Commercial real estate, owner-occupied |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 299,754,000 | 308,824,000
Commercial real estate loans | Commercial real estate, investor-owned |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 966,517,000 | 946,317,000
Commercial real estate loans | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 66,663,000 | 61,095,000
Residential loans | Home equity |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 107,364,000 | 116,024,000
Residential loans | Other residential |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 130,915,000 | 136,657,000
Consumer loans | Installment and other consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 23,805,000 | 27,682,000
Financial asset, other than financial asset acquired with credit deterioration |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 698,000 | 1,648,000
Current | 2,107,293,000 | 1,841,638,000
Total loans | 2,107,991,000 | 1,843,286,000
Non-accrual | 1,442,000 | 226,000
Financial asset, other than financial asset acquired with credit deterioration | 30-59 days past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 415,000 | 1,288,000
Financial asset, other than financial asset acquired with credit deterioration | 60-89 days past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 283,000 | 193,000
Financial asset, other than financial asset acquired with credit deterioration | 90 days or more past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 0 | 167,000
Financial asset, other than financial asset acquired with credit deterioration | Commercial loans | Commercial and industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 198,000 | 1,000
Current | 512,775,000 | 246,686,000
Total loans | 512,973,000 | 246,687,000
Non-accrual | 0 | 0
Financial asset, other than financial asset acquired with credit deterioration | Commercial loans | Commercial and industrial | 30-59 days past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 198,000 | 1,000
Financial asset, other than financial asset acquired with credit deterioration | Commercial loans | Commercial and industrial | 60-89 days past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 0 | 0
Financial asset, other than financial asset acquired with credit deterioration | Commercial loans | Commercial and industrial | 90 days or more past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 0 | 0
Financial asset, other than financial asset acquired with credit deterioration | Commercial real estate loans | Commercial real estate, owner-occupied |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 0 | 0
Current | 299,754,000 | 308,824,000
Total loans | 299,754,000 | 308,824,000
Non-accrual | 0 | 0
Financial asset, other than financial asset acquired with credit deterioration | Commercial real estate loans | Commercial real estate, owner-occupied | 30-59 days past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 0 | 0
Financial asset, other than financial asset acquired with credit deterioration | Commercial real estate loans | Commercial real estate, owner-occupied | 60-89 days past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 0 | 0
Financial asset, other than financial asset acquired with credit deterioration | Commercial real estate loans | Commercial real estate, owner-occupied | 90 days or more past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 0 | 0
Financial asset, other than financial asset acquired with credit deterioration | Commercial real estate loans | Commercial real estate, investor-owned |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 0 | 1,001,000
Current | 966,517,000 | 945,316,000
Total loans | 966,517,000 | 946,317,000
Non-accrual | 886,000 | 0
Financial asset, other than financial asset acquired with credit deterioration | Commercial real estate loans | Commercial real estate, investor-owned | 30-59 days past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 0 | 1,001,000
Financial asset, other than financial asset acquired with credit deterioration | Commercial real estate loans | Commercial real estate, investor-owned | 60-89 days past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 0 | 0
Financial asset, other than financial asset acquired with credit deterioration | Commercial real estate loans | Commercial real estate, investor-owned | 90 days or more past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 0 | 0
Financial asset, other than financial asset acquired with credit deterioration | Commercial real estate loans | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 0 | 0
Current | 66,663,000 | 61,095,000
Total loans | 66,663,000 | 61,095,000
Non-accrual | 0 | 0
Financial asset, other than financial asset acquired with credit deterioration | Commercial real estate loans | Construction | 30-59 days past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 0 | 0
Financial asset, other than financial asset acquired with credit deterioration | Commercial real estate loans | Construction | 60-89 days past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 0 | 0
Financial asset, other than financial asset acquired with credit deterioration | Commercial real estate loans | Construction | 90 days or more past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 0 | 0
Financial asset, other than financial asset acquired with credit deterioration | Residential loans | Home equity |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 493,000 | 544,000
Current | 106,871,000 | 115,480,000
Total loans | 107,364,000 | 116,024,000
Non-accrual | 532,000 | 168,000
Financial asset, other than financial asset acquired with credit deterioration | Residential loans | Home equity | 30-59 days past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 217,000 | 279,000
Financial asset, other than financial asset acquired with credit deterioration | Residential loans | Home equity | 60-89 days past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 276,000 | 98,000
Financial asset, other than financial asset acquired with credit deterioration | Residential loans | Home equity | 90 days or more past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 0 | 167,000
Financial asset, other than financial asset acquired with credit deterioration | Residential loans | Other residential |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 0 | 0
Current | 130,915,000 | 136,657,000
Total loans | 130,915,000 | 136,657,000
Non-accrual | 0 | 0
Financial asset, other than financial asset acquired with credit deterioration | Residential loans | Other residential | 30-59 days past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 0 | 0
Financial asset, other than financial asset acquired with credit deterioration | Residential loans | Other residential | 60-89 days past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 0 | 0
Financial asset, other than financial asset acquired with credit deterioration | Residential loans | Other residential | 90 days or more past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 0 | 0
Financial asset, other than financial asset acquired with credit deterioration | Consumer loans | Installment and other consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 7,000 | 102,000
Current | 23,798,000 | 27,580,000
Total loans | 23,805,000 | 27,682,000
Non-accrual | 24,000 | 58,000
Financial asset, other than financial asset acquired with credit deterioration | Consumer loans | Installment and other consumer | 30-59 days past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 0 | 7,000
Financial asset, other than financial asset acquired with credit deterioration | Consumer loans | Installment and other consumer | 60-89 days past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | 7,000 | 95,000
Financial asset, other than financial asset acquired with credit deterioration | Consumer loans | Installment and other consumer | 90 days or more past due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans past due | $ 0 | $ 0

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