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Acquisition Activities - Accounting for acquired loans (Details) - USD ($) $ in Thousands |  |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | ---
Oct. 01, 2022 | Sep. 01, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Acquisition Activities |  |  |  |  |  |
Charge-offs |  |  | $ 540 | $ 253 | $ 1,218 | $ 1,338
Rock Canyon Bank |  |  |  |  |  |
Acquisition Activities |  |  |  |  |  |
Loans, net |  | $ 535,197 |  |  |  |
Loans acquired accounted as PCD |  | 13,145 |  |  |  |
Loans previously charged-off |  | 2,054 |  |  |  |
Rock Canyon Bank | Receivables Acquired with Deteriorated Credit Quality [Member] |  |  |  |  |  |
Acquisition Activities |  |  |  |  |  |
Loans, net |  | 537,700 |  |  |  |
Loans acquired accounted as PCD |  | $ 11,100 |  |  |  |
Loans acquired accounted as PCD percentage |  | 2.10% |  |  |  |
Gross contractual amounts receivable |  | $ 13,800 |  |  |  |
Loans not expected to be collected |  | $ 4,500 |  |  |  |
Bank of Jackson Hole |  |  |  |  |  |
Acquisition Activities |  |  |  |  |  |
Loans, net | $ 1,185,699 |  |  |  |  |
Loans acquired accounted as PCD | 13,902 |  |  |  |  |
Bank of Jackson Hole | Receivables Acquired with Deteriorated Credit Quality [Member] |  |  |  |  |  |
Acquisition Activities |  |  |  |  |  |
Loans, net | 1,200 |  |  |  |  |
Loans acquired accounted as PCD | $ 13,900 |  |  |  |  |
Loans acquired accounted as PCD percentage | 1.10% |  |  |  |  |
Gross contractual amounts receivable | $ 14,000 |  |  |  |  |
Charge-offs | 500 |  |  |  |  |
Loans not expected to be collected | $ 3,800 |  |  |  |  |

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- Definition Amount of loans previously charged-off attributable to other factors on financing receivable purchased with credit deterioration. + References No definition available. + Details
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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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479907/805-20-50-5 + Details
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- Definition For receivables acquired in a business combination, excluding certain loans and debt securities acquired in a transfer (as defined), this element represents the best estimate at the acquisition date of the contractual cash flows not expected to be collected, by major class of receivable, such as loans, direct finance leases (as defined), and any other class of receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479907/805-20-50-1 + Details
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- Definition Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479907/805-20-50-1 + Details
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- Definition Amount, excluding accrued interest, of decrease in allowance for credit loss on financing receivable from writeoff. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-6 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 + Details
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