Loans - Balance in the Allowance for Loan Losses and the Recorded Investment in Loans by Portfolio Segment, Based on the Impairment Method (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Balance in the Allowance for Loan Losses and the Recorded Investment in Loans by Portfolio Segment, Based on the Impairment Method
Allowance for loan losses, Individually evaluated for impairment	$ 1,835	$ 6,944
Allowance for loan losses, Collectively evaluated for impairment	21,450	20,904
Total allowance balance	23,285	27,848	$ 19,658	$ 19,089
Loans, Individually evaluated for impairment	10,264	15,140
Loans, Collectively evaluated for impairment	2,523,899	1,871,592
Total loan balance	2,534,163	1,886,732
Commercial
Balance in the Allowance for Loan Losses and the Recorded Investment in Loans by Portfolio Segment, Based on the Impairment Method
Allowance for loan losses, Individually evaluated for impairment	1,835	6,944
Allowance for loan losses, Collectively evaluated for impairment	8,618	10,117
Total allowance balance	10,453	17,061	10,608	10,656
Loans, Individually evaluated for impairment	4,810	9,495
Loans, Collectively evaluated for impairment	626,737	588,268
Total loan balance	631,547	597,763
Real estate
Balance in the Allowance for Loan Losses and the Recorded Investment in Loans by Portfolio Segment, Based on the Impairment Method
Allowance for loan losses, Collectively evaluated for impairment	12,750	10,671
Total allowance balance	12,750	10,671	8,950	8,327
Loans, Individually evaluated for impairment	5,454	5,645
Loans, Collectively evaluated for impairment	1,877,280	1,270,871
Total loan balance	1,882,734	1,276,516
Consumer
Balance in the Allowance for Loan Losses and the Recorded Investment in Loans by Portfolio Segment, Based on the Impairment Method
Allowance for loan losses, Collectively evaluated for impairment	82	116
Total allowance balance	82	116	$ 100	$ 106
Loans, Collectively evaluated for impairment	19,882	12,453
Total loan balance	$ 19,882	$ 12,453

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The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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The balance of financing receivables that were collectively evaluated for impairment.

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The balance of financing receivables that were individually evaluated for impairment.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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