Name:	fbp_FinancingReceivableModificationsNumberOfContracts1Accruing
Namespace Prefix:	fbp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

The number of financing receivables that have been modified by troubled debt restructurings during the period and are in nonaccrual status.

No definition available.

Name:	fbp_FinancingReceivableModificationsNumberOfContracts1Nonaccrual
Namespace Prefix:	fbp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

The number of financing receivables that have been modified by troubled debt restructurings during the period.

No definition available.

Name:	fbp_FinancingReceivableModificationsNumberOfContracts1Total
Namespace Prefix:	fbp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Amount of investment in financing receivables (after modification) modified by troubled debt restructurings during the period and still accruing for interest.

No definition available.

Name:	fbp_FinancingReceivableModificationsPostModificationRecordedInvestment1Accruing
Namespace Prefix:	fbp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amount of investment in financing receivables (after modification) modified by troubled debt restructurings during the period and not accruing for interest.

No definition available.

Name:	fbp_FinancingReceivableModificationsPostModificationRecordedInvestment1Nonaccrual
Namespace Prefix:	fbp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- References

No definition available.

Name:	fbp_InformationRelatedToLoansModifiedInTroubledDebtRestructuringAbstract
Namespace Prefix:	fbp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Amount of investment in financing receivables (before modification) modified by troubled debt restructurings during the period and still accruing for interest.

No definition available.

Name:	fbp_TdrsArisingDuringPeriodAccruingPremodification
Namespace Prefix:	fbp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amount of investment in financing receivables (before modification) modified by troubled debt restructurings during the period and not accruing for interest.

No definition available.

Name:	fbp_TdrsArisingDuringPeriodNonaccrualPremodification
Namespace Prefix:	fbp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Post-modification amount of investment in financing receivables modified by troubled debt restructurings.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524

Name:	us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Pre-modification amount of investment in financing receivables modified by troubled debt restructurings.

Name:	us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_FixedRateResidentialMortgageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_HomeEquityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_RealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: