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Loans and Allowance for Loan Losses - Credit Quality (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	$ 2,110,201	$ 1,843,286
Financial Asset Acquired and No Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	2,110,201	1,843,286
Pass | Financial Asset Acquired and No Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	2,024,247	1,759,961
Special Mention | Financial Asset Acquired and No Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	72,409	73,391
Substandard | Financial Asset Acquired and No Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	13,545	9,934
Commercial loans | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	525,117	246,687
Commercial loans | Commercial and industrial | Financial Asset Acquired and No Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	525,117	246,687
Commercial loans | Commercial and industrial | Pass | Financial Asset Acquired and No Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	491,861	209,213
Commercial loans | Commercial and industrial | Special Mention | Financial Asset Acquired and No Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	33,042	37,065
Commercial loans | Commercial and industrial | Substandard | Financial Asset Acquired and No Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	214	409
Commercial real estate loans | Commercial real estate, owner-occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	296,163	308,824
Commercial real estate loans | Commercial real estate, owner-occupied | Financial Asset Acquired and No Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	296,163	308,824
Commercial real estate loans | Commercial real estate, owner-occupied | Pass | Financial Asset Acquired and No Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	252,321	264,766
Commercial real estate loans | Commercial real estate, owner-occupied | Special Mention | Financial Asset Acquired and No Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	34,470	35,016
Commercial real estate loans | Commercial real estate, owner-occupied | Substandard | Financial Asset Acquired and No Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	9,372	9,042
Commercial real estate loans | Commercial real estate, investor-owned
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	946,389	946,317
Commercial real estate loans | Commercial real estate, investor-owned | Financial Asset Acquired and No Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	946,389	946,317
Commercial real estate loans | Commercial real estate, investor-owned | Pass | Financial Asset Acquired and No Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	939,323	945,757
Commercial real estate loans | Commercial real estate, investor-owned | Special Mention | Financial Asset Acquired and No Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	4,047	560
Commercial real estate loans | Commercial real estate, investor-owned | Substandard | Financial Asset Acquired and No Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	3,019	0
Commercial real estate loans | Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	66,368	61,095
Commercial real estate loans | Construction | Financial Asset Acquired and No Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	66,368	61,095
Commercial real estate loans | Construction | Pass | Financial Asset Acquired and No Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	66,368	61,095
Commercial real estate loans | Construction | Special Mention | Financial Asset Acquired and No Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0	0
Commercial real estate loans | Construction | Substandard | Financial Asset Acquired and No Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0	0
Residential loans | Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	112,911	116,024
Residential loans | Home equity | Financial Asset Acquired and No Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	112,911	116,024
Residential loans | Home equity | Pass | Financial Asset Acquired and No Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	111,266	114,935
Residential loans | Home equity | Special Mention | Financial Asset Acquired and No Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	850	750
Residential loans | Home equity | Substandard | Financial Asset Acquired and No Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	795	339
Residential loans | Other residential
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	136,859	136,657
Residential loans | Other residential | Financial Asset Acquired and No Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	136,859	136,657
Residential loans | Other residential | Pass | Financial Asset Acquired and No Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	136,859	136,657
Residential loans | Other residential | Special Mention | Financial Asset Acquired and No Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0	0
Residential loans | Other residential | Substandard | Financial Asset Acquired and No Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0	0
Consumer loans | Installment and other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	26,394	27,682
Consumer loans | Installment and other consumer | Financial Asset Acquired and No Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	26,394	27,682
Consumer loans | Installment and other consumer | Pass | Financial Asset Acquired and No Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	26,249	27,538
Consumer loans | Installment and other consumer | Special Mention | Financial Asset Acquired and No Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0	0
Consumer loans | Installment and other consumer | Substandard | Financial Asset Acquired and No Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	$ 145	$ 144

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Amount before allowance and after 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.

+ 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=121593590&loc=d3e4428-111522

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5074-111524

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