EBP Administrative Fees And Other Services Incurred By Company

No definition available.

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

- Definition

EBP, Distributions Relating to Termination Of Service Minimum Value Required

+ References

No definition available.

+ Details

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

- Definition

EBP, Investment Advisory And Retirement Plan Expenses Incurred By Company

+ References

No definition available.

+ Details

Name:	fbp_EbpInvestmentAdvisoryAndRetirementPlanExpensesIncurredByCompany
Namespace Prefix:	fbp_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Value Of Vested Account Benchmark

+ References

No definition available.

+ Details

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

- Definition

Deferral Rate Increase Per Year

+ References

No definition available.

+ Details

Name:	fbp_EmployeeBenefitPlanDeferralRateIncreasePerYear
Namespace Prefix:	fbp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Employee Benefit Plan Note Receivable From Participant Term

+ References

No definition available.

+ Details

Name:	fbp_EmployeeBenefitPlanNoteReceivableFromParticipantTerm
Namespace Prefix:	fbp_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Employee Benefit Plan, Participant Contribution Pre-tax Maximum Annual Catch-Up Compensation Amount

+ References

No definition available.

+ Details

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

- Definition

Employee Benefit Plan, Period After Automatic Enrollment Applies

+ References

No definition available.

+ Details

Name:	fbp_EmployeeBenefitPlanPeriodAfterAutomaticEnrollmentApplies
Namespace Prefix:	fbp_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Required service period after which full-time employees are eligible to participate in deferral contributions.

+ References

No definition available.

+ Details

Name:	fbp_EmployeeBenefitPlanRequiredServicePeriodEligibleToParticipateInDeferralContributions
Namespace Prefix:	fbp_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Waiver election, period before automatic enrollment applies.

+ References

No definition available.

+ Details

Name:	fbp_EmployeeBenefitPlanWaiverElectionPeriodBeforeAutomaticEnrollmentApplies
Namespace Prefix:	fbp_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- 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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-SubTopic 205
-Topic 962
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478416/962-205-50-1

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of employer matching contribution on eligible participant contribution to employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478873/962-325-55-17

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of participant compensation eligible for employer matching contribution for participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanEmployerContributionParticipantCompensationMatchedPercentage
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of eligible compensation contributed for participant automatically enrolled in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanParticipantContributionAutomaticDeferralRate
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of maximum pretax annual compensation that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), is permitted to contribute.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478416/962-205-50-1

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Interest rate on participant loan in schedule of asset held for investment of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-05(a)(Schedule I))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
-Subparagraph (1)(i)(D)
-Publisher DOL-EBSA

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage added to reference rate used to compute variable rate on loan receivable.

+ References

No definition available.

+ Details

Name:	us-gaap_LoansReceivableBasisSpreadOnVariableRate
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	dei_LegalEntityAxis=fbp_EBP004Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=fbp_BiWeeklyPayrollMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=fbp_LumpSumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=fbp_HomeLoansExceedingFiveYearsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=fbp_Secure20ActMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
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- Details

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- Details

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Description of the Plan (Narrative) (Details) - EBP 004 [Member] - USD ($)	2 Months Ended	10 Months Ended	12 Months Ended
	Feb. 28, 2025	Dec. 31, 2025	Dec. 31, 2026	Dec. 31, 2025
Employee Benefit Plan, Description of Plan [Line Items]
Required service period, eligible to participate in deferral contributions				3 months
Period after automatic enrollment applies				3 months
Waiver election, period before automatic enrollment applies				30 days
Deferral rate of eligible employee enrolled in plan	2.00%	3.00%
Deferral rate increase	1.00%	1.00%
Employer contribution, matching percentage				50.00%
Participant compensation matched percentage				6.00%
Basis spread on variable rate		2.00%		2.00%
Distributions relating to termination of service minimum value required				$ 1,000
Value of vested account benchmark				7,000
Administrative fees and other services incurred by company				47,958
Investment advisory and retirement plan expenses incurred by company				$ 10,080
Bi-Weekly Payroll [Member]
Employee Benefit Plan, Description of Plan [Line Items]
Employer contribution, matching percentage				25.00%
Participant compensation matched percentage				6.00%
Lump Sum [Member]
Employee Benefit Plan, Description of Plan [Line Items]
Employer contribution, matching percentage				25.00%
Participant compensation matched percentage				6.00%
Home Loans, Exceeding Five Years [Member]
Employee Benefit Plan, Description of Plan [Line Items]
Note receivable from participant term				5 years
SECURE 2.0 ACT [Member]
Employee Benefit Plan, Description of Plan [Line Items]
Catch-up compensation amount			$ 11,250	$ 11,250
Minimum [Member]
Employee Benefit Plan, Description of Plan [Line Items]
Interest rate				5.25%
Maximum [Member]
Employee Benefit Plan, Description of Plan [Line Items]
Deferral rate of eligible employee enrolled in plan	5.00%	6.00%
Maximum amount of allowable deferral contributions				$ 23,500
Catch-up compensation amount				$ 7,500
Interest rate				10.50%
Note receivable from participant term				5 years
Maximum [Member] \| Scenario Forecast [Member]
Employee Benefit Plan, Description of Plan [Line Items]
Maximum amount of allowable deferral contributions			24,500
Catch-up compensation amount			$ 8,000