Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

Name:	us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

Name:	us-gaap_AllowanceForLoanAndLeaseLossesRollForward
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(3)
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.7(d))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

Name:	us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.7(d))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (b)(1)(ii)
-URI http://asc.fasb.org/extlink&oid=118939070&loc=d3e15032-111544

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SAB Topic 6.L.1)
-URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707

+ Details

Name:	us-gaap_LoansAndLeasesReceivableAllowance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of expense related to estimated loss from loan and lease transactions.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.11)
-URI http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524

+ Details

Name:	us-gaap_ProvisionForLoanAndLeaseLosses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	srt_RestatementAxis=srt_ScenarioPreviouslyReportedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=us-gaap_AccountingStandardsUpdate201613Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RestatementAxis=srt_RestatementAdjustmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=us-gaap_MortgageReceivablesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=bdge_MultiFamilyPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=bdge_CommercialFinancialAndAgriculturalPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=bdge_RealEstateConstructionAndLandLoansPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

LOANS - Changes in the Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Allowance for Loan Losses
Beginning balance	$ 39,215	$ 31,784	$ 32,786	$ 31,418
Charge-offs	(320)	(4,224)	(536)	(4,470)
Recoveries	6	111	26	123
Provision for credit losses	4,500	3,500	9,500	4,100
Ending balance	43,401	31,171	43,401	31,171
Prior to adoption \| ASU 2016-13
Allowance for Loan Losses
Beginning balance			32,786
Impact of adoption \| ASU 2016-13
Allowance for Loan Losses
Beginning balance			1,625
Commercial real estate occupied:
Allowance for Loan Losses
Beginning balance			12,150
Commercial real estate occupied: \| Mortgage loans
Allowance for Loan Losses
Beginning balance	4,968	11,099		10,792
Charge-offs		(3,670)	(1)	(3,670)
Provision for credit losses	2,025	3,449	2,556	3,756
Ending balance	6,993	10,878	6,993	10,878
Commercial real estate occupied: \| Mortgage loans \| Prior to adoption \| ASU 2016-13
Allowance for Loan Losses
Beginning balance			12,150
Commercial real estate occupied: \| Mortgage loans \| Impact of adoption \| ASU 2016-13
Allowance for Loan Losses
Beginning balance			(7,712)
Multi-family
Allowance for Loan Losses
Beginning balance			4,829
Multi-family \| Mortgage loans
Allowance for Loan Losses
Beginning balance	1,323	2,557		2,566
Provision for credit losses	305	(12)	388	(21)
Ending balance	1,628	2,545	1,628	2,545
Multi-family \| Mortgage loans \| Prior to adoption \| ASU 2016-13
Allowance for Loan Losses
Beginning balance			4,829
Multi-family \| Mortgage loans \| Impact of adoption \| ASU 2016-13
Allowance for Loan Losses
Beginning balance			(3,589)
Residential real estate
Allowance for Loan Losses
Beginning balance			1,882
Residential real estate \| Mortgage loans
Allowance for Loan Losses
Beginning balance	4,025	3,374		3,935
Recoveries	1	110	2	111
Provision for credit losses	(334)	(864)	(374)	(1,426)
Ending balance	3,692	2,620	3,692	2,620
Residential real estate \| Mortgage loans \| Prior to adoption \| ASU 2016-13
Allowance for Loan Losses
Beginning balance			1,882
Residential real estate \| Mortgage loans \| Impact of adoption \| ASU 2016-13
Allowance for Loan Losses
Beginning balance			2,182
Commercial, industrial and agricultural
Allowance for Loan Losses
Beginning balance	24,545	13,073	12,583	12,722
Charge-offs	(318)	(554)	(533)	(796)
Recoveries	5	1	24	12
Provision for credit losses	2,717	1,038	6,176	1,620
Ending balance	26,949	13,558	26,949	13,558
Commercial, industrial and agricultural \| Prior to adoption \| ASU 2016-13
Allowance for Loan Losses
Beginning balance			12,583
Commercial, industrial and agricultural \| Impact of adoption \| ASU 2016-13
Allowance for Loan Losses
Beginning balance			8,699
Real estate construction and land loans
Allowance for Loan Losses
Beginning balance	3,182	1,526	1,066	1,297
Provision for credit losses	(562)	(193)	280	36
Ending balance	2,620	1,333	2,620	1,333
Real estate construction and land loans \| Prior to adoption \| ASU 2016-13
Allowance for Loan Losses
Beginning balance			1,066
Real estate construction and land loans \| Impact of adoption \| ASU 2016-13
Allowance for Loan Losses
Beginning balance			1,274
Installment/consumer loans
Allowance for Loan Losses
Beginning balance	1,172	155	276	106
Charge-offs	(2)		(2)	(4)
Provision for credit losses	349	82	474	135
Ending balance	$ 1,519	$ 237	1,519	$ 237
Installment/consumer loans \| Prior to adoption \| ASU 2016-13
Allowance for Loan Losses
Beginning balance			276
Installment/consumer loans \| Impact of adoption \| ASU 2016-13
Allowance for Loan Losses
Beginning balance			$ 771