XML 63 R50.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Loans and Allowance for Loan Losses - Credit Risk Profile by Internally Assigned Risk Grade (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | $ 1,486,616 | $ 1,451,228
Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 1,451,049 | 1,392,597
Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 15,937 | 36,300
Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 19,630 | 22,331
Commercial loans | Commercial and industrial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 218,575 | 219,277
Total loans | 218,615 | 219,452
Commercial loans | Pass | Commercial and industrial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 201,987 | 192,560
Commercial loans | Special Mention | Commercial and industrial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 9,197 | 22,457
Commercial loans | Substandard | Commercial and industrial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 7,391 | 4,260
Commercial real estate loans | Commercial real estate, owner-occupied |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 246,641 | 240,598
Total loans | 247,713 | 242,309
Commercial real estate loans | Commercial real estate, investor |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 722,522 | 714,153
Total loans | 724,228 | 715,879
Commercial real estate loans | Construction |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 74,809 | 65,494
Total loans | 74,809 | 65,495
Commercial real estate loans | Pass | Commercial real estate, owner-occupied |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 234,849 | 219,060
Commercial real estate loans | Pass | Commercial real estate, investor |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 720,417 | 710,042
Commercial real estate loans | Pass | Construction |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 71,564 | 62,255
Commercial real estate loans | Special Mention | Commercial real estate, owner-occupied |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 4,799 | 12,371
Commercial real estate loans | Special Mention | Commercial real estate, investor |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 607 | 372
Commercial real estate loans | Special Mention | Construction |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 0 | 0
Commercial real estate loans | Substandard | Commercial real estate, owner-occupied |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 6,993 | 9,167
Commercial real estate loans | Substandard | Commercial real estate, investor |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 1,498 | 3,739
Commercial real estate loans | Substandard | Construction |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 3,245 | 3,239
Residential loans | Home equity |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 117,105 | 112,232
Total loans | 117,207 | 112,300
Residential loans | Other residential |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 78,549 | 73,154
Residential loans | Pass | Home equity |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 115,680 | 109,959
Residential loans | Pass | Other residential |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 78,549 | 73,154
Residential loans | Special Mention | Home equity |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 1,334 | 1,100
Residential loans | Special Mention | Other residential |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 0 | 0
Residential loans | Substandard | Home equity |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans excluding purchased credit-impaired loans | 91 | 1,173
Residential loans | Substandard | Other residential |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 0 | 0
Consumer loans | Installment and other consumer |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 25,495 | 22,639
Consumer loans | Pass | Installment and other consumer |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 25,083 | 22,307
Consumer loans | Special Mention | Installment and other consumer |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 0 | 0
Consumer loans | Substandard | Installment and other consumer |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 412 | 332
Receivables Acquired with Deteriorated Credit Quality |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchased credit-impaired | 2,920 | 3,681
Receivables Acquired with Deteriorated Credit Quality | Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchased credit-impaired | 2,920 | 3,260
Receivables Acquired with Deteriorated Credit Quality | Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchased credit-impaired | 0 | 0
Receivables Acquired with Deteriorated Credit Quality | Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchased credit-impaired | 0 | 421
Receivables Acquired with Deteriorated Credit Quality | Commercial loans | Commercial and industrial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchased credit-impaired | 40 | 175
Receivables Acquired with Deteriorated Credit Quality | Commercial real estate loans | Commercial real estate, owner-occupied |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchased credit-impaired | 1,072 | 1,711
Receivables Acquired with Deteriorated Credit Quality | Commercial real estate loans | Commercial real estate, investor |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchased credit-impaired | 1,706 | 1,726
Receivables Acquired with Deteriorated Credit Quality | Commercial real estate loans | Construction |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchased credit-impaired | 0 | 1
Receivables Acquired with Deteriorated Credit Quality | Residential loans | Home equity |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchased credit-impaired | 102 | 68
Receivables Acquired with Deteriorated Credit Quality | Residential loans | Other residential |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchased credit-impaired | 0 | 0
Receivables Acquired with Deteriorated Credit Quality | Consumer loans | Installment and other consumer |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Purchased credit-impaired | $ 0 | $ 0

X
- Definition Loans and Leases Receivable, Net of Deferred Income, Excluding Purchased Credit-impaired Loans + References No definition available. + Details
Name: | bmrc_LoansAndLeasesReceivableNetOfDeferredIncomeExcludingPurchasedCreditImpairedLoans
Namespace Prefix: | bmrc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- 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
Name: | us-gaap_FinancingReceivableRecordedInvestmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount before allowance and after 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=65884687&loc=d3e4428-111522 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5074-111524 + Details
Name: | us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Net amount of the investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, credit card receivables, notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. Excludes trade accounts receivable with contractual maturity of one year or less and arose from the sale of goods or services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_NotesReceivableNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_PassMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_SpecialMentionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_SubstandardMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=bmrc_CommercialAndIndustrialMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=bmrc_CommercialRealEstateLoanOwnerOccupiedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=bmrc_CommercialRealEstateLoanInvestorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConstructionLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_HomeEquityLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=bmrc_OtherResidentialLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=bmrc_InstallmentAndOtherConsumerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ReceivablesAcquiredWithDeterioratedCreditQualityAxis=us-gaap_ReceivablesAcquiredWithDeterioratedCreditQualityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |