NET FRAUD LOSS (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Sep. 30, 2018	Dec. 31, 2018
NET FRAUD LOSS
Net fraud loss	$ 9,500	$ 8,900

Represents non-interest expense items related to fraud loss.

No definition available.

Name:	bdge_NoninterestExpenseFraudLoss
Namespace Prefix:	bdge_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration