SECURITIES - Total Available for Sale and Held to Maturity Investment Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Total securities
Amortized Cost	$ 867,927	$ 857,544
Gross Unrealized Gains	2,771	1,426
Gross Unrealized Losses	(15,614)	(21,292)
Total securities	$ 855,084	$ 837,678

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