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Amount of increase (decrease) in Federal Home Loan Bank (FHLBank) advances to member financial institutions due to purchase accounting adjustments.

No definition available.

Name:	bfc_FederalHomeLoanBankAdvancesIncreaseDecreaseDueToPurchaseAccountingAdjustments
Namespace Prefix:	bfc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 470
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480876/942-470-45-1

Name:	us-gaap_AdvancesFromFederalHomeLoanBanks
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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.

No definition available.

Name:	us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankLineItems
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Interest rate of advances made and reported by Federal Home Loan Bank (FHLBank).

No definition available.

Name:	us-gaap_FederalHomeLoanBankAdvancesInterestRate
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Period Type:	instant

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