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QUARTERLY FINANCIAL DATA (UNAUDITED) (Parentheticals) (Details 1) - USD ($) $ in Millions | Dec. 31, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015
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CNB and FNBNY |  |  |  |  |  |
Costs associated with acquisition | $ (0.7) | $ (0.3) |  |  |  |
CNB |  |  |  |  |  |
Costs associated with acquisition |  |  | $ 0.5 | $ 0.9 | $ 8.2 | $ 0.2

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- Definition Amount of direct costs of the business combination including legal, accounting, and other costs incurred to consummate the business acquisition. + References No definition available. + Details
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_BusinessAcquisitionAxis=bdge_CommunityNationalBankMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |