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Legal Proceedings and Contingencies (Narrative) (Details) (USD $) In Millions, unless otherwise specified | Mar. 31, 2015
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Legal Proceedings and Contingencies [Abstract] |
Receivable related to claims involving the same borrower for which the FDIC has denied the claims | $ 1.2 fbp_ReceivableRelatedToClaimsInvolvingSameBorrowerForWhichFDICDeniedClaims

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- Definition Represents the amount of receivables related to claims involving the same borrower for which the FDIC has denied the claims because the FDIC disagrees with the collection strategy that the entity undertook. + References No definition available. + Details
Name: | fbp_ReceivableRelatedToClaimsInvolvingSameBorrowerForWhichFDICDeniedClaims
Namespace Prefix: | fbp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration