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Pension and Post-retirement Benefit Obligations - Additional Information (Details) | Dec. 31, 2024 USD ($)
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Postemployment Benefits [Abstract] |
Required minimum contributions for the pension plans | $ 0

X
- Definition Defined Benefit Plan, Required Minimum Contributions + References No definition available. + Details
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Namespace Prefix: | bwmn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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