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Loans and allowance for loan losses - Additional Information (Details) | 9 Months Ended |
--- | --- | ---
Sep. 30, 2021 USD ($) item | Dec. 31, 2020 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Troubled debt restructuring | $ 0 | $ 0
Outstanding amount | $ 96,151,000 | $ 98,455,000
PPP |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Number of loans granted for deferral | item | 50 |
Total unpaid balance of loans granted for deferral | $ 9,700,000 |
Number of loans remain for deferral | item | 2 |
Total unpaid balance of loans remain for deferral | $ 127,000 |
Outstanding amount | $ 71,000 |

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- Definition Remaining number of loans granted for deferral. + References No definition available. + Details
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- Definition Amount of total unpaid balance for k granted for deferral. + References No definition available. + Details
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- Definition Amount of remaining total unpaid balance for loans granted for deferral. + References No definition available. + Details
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- Definition Amount of financing receivable modified as troubled debt restructuring. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121585226&loc=d3e18845-111554 + Details
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- Definition Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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