Loans - Impaired Loans with Associated Allowance (Details) $ in Thousands	3 Months Ended
Mar. 31, 2019 USD ($) loan	Dec. 31, 2018 USD ($)
Unpaid principal balance
Unpaid principal balance, with no related allowance	$ 1,820	$ 1,405
Unpaid principal balance, with related allowance	942	2,032
Unpaid principal balance	2,762	3,437
Recorded investment
Recorded investment, with no related allowance	1,652	1,399
Recorded investment, with related allowance	878	1,893
Recorded investment	2,530	3,292
Specific reserves	230	667
Loans receivable, nonaccrual status	7,274	6,873
Decrease in impaired Loans	645
SBA loans held for investment
Unpaid principal balance
Unpaid principal balance, with no related allowance	774	359
Unpaid principal balance, with related allowance	204	1,257
Unpaid principal balance	978	1,616
Recorded investment
Recorded investment, with no related allowance	606	353
Recorded investment, with related allowance	140	1,118
Recorded investment	746	1,471
Specific reserves	140	540
Loans receivable, nonaccrual status	814	1,560
SBA 504 loans
Recorded investment
Loans receivable, nonaccrual status	0	0
Commercial loans
Unpaid principal balance
Unpaid principal balance, with no related allowance	1,046	1,046
Unpaid principal balance, with related allowance	738	775
Unpaid principal balance	1,784	1,821
Recorded investment
Recorded investment, with no related allowance	1,046	1,046
Recorded investment, with related allowance	738	775
Recorded investment	1,784	1,821
Specific reserves	90	127
Commercial loans \| Other
Unpaid principal balance
Unpaid principal balance, with related allowance		30
Unpaid principal balance		30
Recorded investment
Recorded investment, with related allowance		30
Recorded investment		30
Specific reserves		30
Loans receivable, nonaccrual status	0	30
Commercial loans \| Commercial real estate
Unpaid principal balance
Unpaid principal balance, with no related allowance	1,046	1,046
Unpaid principal balance, with related allowance	738	745
Unpaid principal balance	1,784	1,791
Recorded investment
Recorded investment, with no related allowance	1,046	1,046
Recorded investment, with related allowance	738	745
Recorded investment	1,784	1,791
Specific reserves	90	97
Loans receivable, nonaccrual status	1,046	1,046
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	$ 68	$ 89
Transfer To OREO \| Small Business Administration
Recorded investment
Number of loans \| loan	1
Other real estate, additions	$ 328
Charge Off And Short Sale \| Small Business Administration
Recorded investment
Number of loans \| loan	2
Charge-off	$ 100
Financing receivable, impaired, short sale	$ 184

Financing Receivable, Impaired, Proceeds From Short Sale

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Financing Receivable, Impaired, Write Off

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

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Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date.

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Amount of unpaid principal balance of impaired financing receivables with related allowance for credit losses and without related allowance for credit losses.

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Additions of other real estate not separately disclosed, including, but not limited to, real estate investments, real estate loans that qualify as investments in real estate, and premises that are no longer used in operations may also be included in real estate owned. This excludes real estate assets taken in settlement of troubled loans through surrender or foreclosure.

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