Loans (Average Recorded Investments in Impaired Loans and Related Amount of Interest Recognized) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
Average recorded investment	$ 3,167	$ 1,460	$ 4,410
Interest income recognized on impaired loans	103	90	111
Impaired financing receivable average recorded investment, guaranteed by Small Business Administration	85	318	246
SBA loans held for investment
Financing Receivable, Impaired [Line Items]
Average recorded investment	1,063	668	1,535
Interest income recognized on impaired loans	3	47	14
SBA 504 loans
Financing Receivable, Impaired [Line Items]
Average recorded investment	0	82	798
Interest income recognized on impaired loans	0	0	0
Commercial loans \| Other
Financing Receivable, Impaired [Line Items]
Average recorded investment	12	25	607
Interest income recognized on impaired loans	0	0	38
Commercial loans \| Commercial real estate
Financing Receivable, Impaired [Line Items]
Average recorded investment	2,092	685	1,198
Interest income recognized on impaired loans	100	43	59
Commercial loans \| Commercial real estate construction
Financing Receivable, Impaired [Line Items]
Average recorded investment	0	0	272
Interest income recognized on impaired loans	$ 0	$ 0	$ 0

Impaired Financing Receivable Average Recorded Investment, Guaranteed by the Small Business Administration

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5258-111524

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- Definition

Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

+ References

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