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Loans, net and allowance for loan losses - Information Concerning Nonaccrual Loans by Major Loan Classification (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Sep. 30, 2022
Financing Receivable, Recorded Investment, Past Due.
Nonaccrual loans, Total	$ 2,811	$ 2,557
Nonaccrual loans increased	254
Commercial
Financing Receivable, Recorded Investment, Past Due.
Nonaccrual loans, Total	185	102
Real estate Commercial
Financing Receivable, Recorded Investment, Past Due.
Nonaccrual loans, Total	1,793	1,787
Real estate Residential
Financing Receivable, Recorded Investment, Past Due.
Nonaccrual loans, Total	694	423
Consumer
Financing Receivable, Recorded Investment, Past Due.
Nonaccrual loans, Total	$ 139	$ 245

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- Definition

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+ References

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- Definition

Amount of financing receivable on nonaccrual status.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5111-111524

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 16
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919258-210447

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph (a)
-Subparagraph (3)

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph (a)
-Subparagraph (2)

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