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ACQUISITIONS - Acquisition Expenses (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Business Acquisition [Line Items] |  |  |
Severance expense |  | $ 556 |
Occupancy expense |  | 375 |
Data processing |  | 1,073 |
Professional fees |  | 724 |
Other expenses |  | 347 |
Total | $ 0 | 3,075 | $ 0
Pacific Enterprise Bancorp |  |  |
Business Acquisition [Line Items] |  |  |
Total |  | $ 3,100 |

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- Definition Business Combination, Acquisition Related Costs, Data Processing + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The amount of acquisition-related occupancy costs incurred to effect a business combination which costs have been expensed during the period. + References No definition available. + Details
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Namespace Prefix: | bcml_
Data Type: | xbrli:monetaryItemType
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- Definition Business Combination, Acquisition Related Costs, Other Expense + References No definition available. + Details
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- Definition Business Combination, Acquisition Related Costs, Professional Fees + References No definition available. + Details
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Namespace Prefix: | bcml_
Data Type: | xbrli:monetaryItemType
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- Definition Business Combination, Acquisition Related Costs, Severance Expense + References No definition available. + Details
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Namespace Prefix: | bcml_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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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. + Details
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI https://asc.fasb.org/extlink&oid=123586518&loc=d3e1043-128460 + Details
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- Details
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