Loans - Average Recorded Investments and Interest Recognized (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Impaired [Line Items]
Average recorded investment	$ 11,274	$ 9,449	$ 6,940
Interest income recognized on impaired loans	388	488	157
Impaired financing receivable average recorded investment, guaranteed by Small Business Administration	201	719	124
SBA 504 loans
Financing Receivable, Impaired [Line Items]
Average recorded investment		150
Interest income recognized on impaired loans		32
SBA loans held for investment
Financing Receivable, Impaired [Line Items]
Average recorded investment	1,118	1,674	679
Interest income recognized on impaired loans	102	70	17
Commercial loans \| Commercial real estate
Financing Receivable, Impaired [Line Items]
Average recorded investment	1,637	1,232	1,258
Interest income recognized on impaired loans	137	124	36
Commercial loans \| Commercial real estate construction
Financing Receivable, Impaired [Line Items]
Interest income recognized on impaired loans		33
Commercial loans \| Consumer other
Financing Receivable, Impaired [Line Items]
Average recorded investment	889	93	264
Interest income recognized on impaired loans	59	31	6
Residential mortgage loans
Financing Receivable, Impaired [Line Items]
Average recorded investment	4,358	5,409	4,671
Interest income recognized on impaired loans	17	131	61
Consumer loans \| Home equity
Financing Receivable, Impaired [Line Items]
Average recorded investment	553	726	66
Interest income recognized on impaired loans	23	67	37
Consumer loans \| Consumer other
Financing Receivable, Impaired [Line Items]
Average recorded investment	1		$ 2
Residential construction loans
Financing Receivable, Impaired [Line Items]
Average recorded investment	2,718	$ 165
Interest income recognized on impaired loans	$ 50

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

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+ References

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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=123577603&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=123577603&loc=d3e5258-111524

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