Loans - Impaired Loans with Associated Allowance (Details) $ in Thousands	3 Months Ended
Mar. 31, 2020 USD ($) loan	Dec. 31, 2019 USD ($)
Unpaid principal balance
Unpaid principal balance, with no related allowance	$ 2,634	$ 1,437
Unpaid principal balance, with related allowance	857	1,678
Unpaid principal balance	3,491	3,115
Recorded investment
Recorded investment, with no related allowance	1,675	1,277
Recorded investment, with related allowance	832	1,062
Recorded investment	2,507	2,339
Specific reserves	184	414
Loans receivable, nonaccrual status	9,655	5,649
Increase (decrease) in impaired Loans	376
SBA loans held for investment
Unpaid principal balance
Unpaid principal balance, with no related allowance	1,221	1,224
Unpaid principal balance, with related allowance	163	157
Unpaid principal balance	1,384	1,381
Recorded investment
Recorded investment, with no related allowance	1,062	1,064
Recorded investment, with related allowance	138	41
Recorded investment	1,200	1,105
Specific reserves	138	41
Loans receivable, nonaccrual status	1,627	1,164
SBA 504 loans
Recorded investment
Loans receivable, nonaccrual status	0	0
Commercial loans
Unpaid principal balance
Unpaid principal balance, with no related allowance	1,413	213
Unpaid principal balance, with related allowance	694	1,521
Unpaid principal balance	2,107	1,734
Recorded investment
Recorded investment, with no related allowance	613	213
Recorded investment, with related allowance	694	1,021
Recorded investment	1,307	1,234
Specific reserves	46	373
Commercial loans \| Other
Unpaid principal balance
Unpaid principal balance, with no related allowance	500
Unpaid principal balance, with related allowance		816
Unpaid principal balance	500	816
Recorded investment
Recorded investment, with no related allowance	0
Recorded investment, with related allowance		316
Recorded investment	0	316
Specific reserves	0	316
Loans receivable, nonaccrual status	0	316
Commercial loans \| Commercial real estate
Unpaid principal balance
Unpaid principal balance, with no related allowance	913	213
Unpaid principal balance, with related allowance	694	705
Unpaid principal balance	1,607	918
Recorded investment
Recorded investment, with no related allowance	613	213
Recorded investment, with related allowance	694	705
Recorded investment	1,307	918
Specific reserves	46	57
Loans receivable, nonaccrual status	613	213
Commercial loans \| Commercial real estate construction
Recorded investment
Loans receivable, nonaccrual status	0	0
Collateral Pledged \| Small Business Administration
Recorded investment
Loans receivable, nonaccrual status	$ 427	$ 59
Addition To Impaired Loans \| Commercial loans
Recorded investment
Number of loans \| loan	1
Financing receivable	$ 913
Paydown On Loans \| Commercial loans
Recorded investment
Number of loans \| loan	2
Financing receivable	$ 529

Financing Receivable, Recorded Investment, Increase (Decrease) In Impaired Loans

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Financing Receivable, Recorded Investment, Number Of Loans

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Amount of financing receivable on nonaccrual status.

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Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

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Amount of allowance for credit losses related to recorded investment.

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