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Legal (Narrative) (Details) $ in Millions	Jul. 16, 2018 USD ($)
Seabreeze Development [Member]
Loss Contingencies [Line Items]
Investment by plantiff, allegedly defrauded	$ 10.5

X

- Definition

Loss Contingency, Investment by Plantiff, Allegedly Defrauded

+ References

No definition available.

+ Details

Name:	tbbk_LossContingencyInvestmentByPlantiffAllegedlyDefrauded
Namespace Prefix:	tbbk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

X

- Details

Name:	srt_LitigationCaseAxis=tbbk_SeabreezeDevelopmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: