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v3.10.0.1

LOANS (Details 4) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Unpaid Principal Balance | $ 15,080 | $ 17,417
Carrying Value | 12,599 | 14,315
Consumer [Member] |  |
Unpaid Principal Balance | 0 | 0
Carrying Value | 0 | 0
Commercial real estate [Member] |  |
Unpaid Principal Balance | 13,161 | 15,536
Carrying Value | 11,206 | 13,017
Residential [Member] |  |
Unpaid Principal Balance | 1,789 | 1,732
Carrying Value | 1,391 | 1,295
Commercial and industrial [Member] |  |
Unpaid Principal Balance | 130 | 149
Carrying Value | 2 | 3
Construction and land [Member] |  |
Unpaid Principal Balance |  | 0
Carrying Value | $ 0 | $ 0

X
- Definition Represents the monetary amount of Purchase Credit Impaired Loans Carrying Value, during the indicated time period. + References No definition available. + Details
Name: | bcml_PurchaseCrediTimpairedLoansCarryingValues
Namespace Prefix: | bcml_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the monetary amount of Purchase Credit Impaired Loans Unpaid Principal Balance, during the indicated time period. + References No definition available. + Details
Name: | bcml_PurchaseCreditImpairedLoansUnpaidPrincipalsBalance
Namespace Prefix: | bcml_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_ConsumerLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CollateralAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CollateralAxis=us-gaap_ResidentialRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=us-gaap_CommercialAndIndustrialSectorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=bcml_ConstructionAndLandMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |