XML 99 R87.htm IDEA: XBRL DOCUMENT
v3.22.4

Stockholders' Equity and Stock Plans - Cashless Exercise Information (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Equity [Abstract] |  |  |
Number of shares withheld (in shares) | 11,505 | 27,929 | 10,001
Total amount withheld (in thousands) | $ 393 | $ 1,085 | $ 398
Weighted-average price (usd per share) | $ 34.13 | $ 38.85 | $ 39.83

X
- Definition Adjustments Related To Tax Withholding And Exercise Of Options For Share-Based Compensation + References No definition available. + Details
Name: | bmrc_AdjustmentsRelatedToTaxWithholdingAndExerciseOfOptionsForShareBasedCompensation
Namespace Prefix: | bmrc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Share-based Compensation Arrangements by Share-based Payment Award, Options, Tax Withholding And Exercises in Period, Weighted Average Exercise Price + References No definition available. + Details
Name: | bmrc_SharebasedCompensationArrangementsbySharebasedPaymentAwardOptionsTaxWithholdingAndExercisesinPeriodWeightedAverageExercisePrice
Namespace Prefix: | bmrc_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_EquityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares used to settle grantee's tax withholding obligation for award under share-based payment arrangement. + References No definition available. + Details
Name: | us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration