SECURITIES - Total Available for Sale and Held to Maturity Investment Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Total securities
Amortized Cost	$ 672,852	$ 773,101
Gross Unrealized Gains	13,989	5,956
Gross Unrealized Losses	(5,910)	(5,739)
Total securities	$ 680,931	$ 773,318

The cost of debt securities, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined) and fair value hedge accounting adjustments, if any.

No definition available.

Name:	bdge_DebtSecuritiesAvailableForSaleAndHeldToMaturityAmortizedCost
Namespace Prefix:	bdge_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant