XML 103 R88.htm IDEA: XBRL DOCUMENT v3.10.0.1

Employee Benefit Plans (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Jan. 02, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
401(k) Plan [Member]
Deferral rate		5.00%
Percent of annual salary employees may contribute		15.00%
Percent matched by company up to 3 percent of employee salary			100.00%	100.00%
Percent matched by company 3-5 percent of employee salary			50.00%	50.00%
Percent matched by company up to 6 percent of employee salary	100.00%
Matching contributions		$ 3,600	$ 2,300	$ 1,600
Pension Plan [Member]
Accumulated benefit obligation		$ 36,354	$ 38,150	$ 36,840
Expected average annual rate of return		2.75%
Pension Plan [Member] | Fixed Income [Member]
Pension plans allocated assets (percentage)			25.00%	25.00%
Pension Plan [Member] | Equity Securities1 [Member]
Pension plans allocated assets (percentage)			75.00%	75.00%
SERP [Member]
Accumulated benefit obligation		$ 5,794	$ 5,970	$ 5,910

X

- Definition

The automatic rate of deferral for employees enrolled in a defined contribution plan.

+ References

No definition available.

+ Details

Name:	fbp_DeferralRate
Namespace Prefix:	fbp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Expected average annual rate of return.

+ References

No definition available.

+ Details

Name:	fbp_ExpectedAverageAnnualRateOfReturn
Namespace Prefix:	fbp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The percent matched by company in the range of 3 to 5 percent of employee salary.

+ References

No definition available.

+ Details

Name:	fbp_PercentMatchedByCompany305PercentOfEmployeeSalary
Namespace Prefix:	fbp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The percent matched by company up to 6 percent of employee salary.

+ References

No definition available.

+ Details

Name:	fbp_PercentMatchedByCompany6PercentOfEmployeeSalary
Namespace Prefix:	fbp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The percent matched by company up to 3 percent of employee salary for the defined contribution plan.

+ References

No definition available.

+ Details

Name:	fbp_PercentMatchedByCompanyUpTo3PercentOfEmployeeSalary
Namespace Prefix:	fbp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920

+ Details

Name:	us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920

+ Details

Name:	us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Amount of cost for defined contribution plan.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

+ Details

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

X

- Definition

Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_RetirementPlanTypeAxis=fbp_Plan401kMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RetirementPlanTypeAxis=fbp_PensionPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_FixedIncomeInvestmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=fbp_EquitySecurities1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RetirementPlanTypeAxis=fbp_SerpPlanCurrentYearMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: