XML 113 R98.htm IDEA: XBRL DOCUMENT v3.3.1.900

Employee Benefit Plans (Schedule of Investment Category Benchmarks) (Details)	12 Months Ended
	Dec. 31, 2015
Fixed income investments - Cash/money market account [Member]
Investment Category Benchmark	US Treasury T-Bill Auction Index
Range of acceptable deviation from investment category benchmark, minimum	0.00%
Range of acceptable deviation from investment category benchmark, maximum	0.50%
Fixed income investments - US government bond fund [Member]
Investment Category Benchmark	Barclays Intermediate Government Bond Index
Range of acceptable deviation from investment category benchmark, minimum	0.00%
Range of acceptable deviation from investment category benchmark, maximum	2.00%
Fixed income investments - US corporate bond fund [Member]
Investment Category Benchmark	Barclays Aggregate Index
Range of acceptable deviation from investment category benchmark, minimum	0.00%
Range of acceptable deviation from investment category benchmark, maximum	2.00%
Fixed income investments - US corporate high yield bond fund [Member]
Investment Category Benchmark	Barclays High Yield Index
Range of acceptable deviation from investment category benchmark, minimum	0.00%
Range of acceptable deviation from investment category benchmark, maximum	2.00%
Equity investments - Large cap value fund [Member]
Investment Category Benchmark	Russell 1000 Index
Range of acceptable deviation from investment category benchmark, minimum	0.00%
Range of acceptable deviation from investment category benchmark, maximum	3.00%
Equity investments - Mid cap equity fund [Member]
Investment Category Benchmark	Russell Mid Cap Index
Range of acceptable deviation from investment category benchmark, minimum	0.00%
Range of acceptable deviation from investment category benchmark, maximum	3.00%
Equity investments - Small cap growth fund [Member]
Investment Category Benchmark	Russell 2000 Growth Index
Range of acceptable deviation from investment category benchmark, minimum	0.00%
Range of acceptable deviation from investment category benchmark, maximum	3.00%
Equity investments - Foreign equity fund [Member]
Investment Category Benchmark	MSCI EAFE Index
Range of acceptable deviation from investment category benchmark, minimum	0.00%
Range of acceptable deviation from investment category benchmark, maximum	3.00%
Equity investments - Company stock [Member]
Investment Category Benchmark	Russell 2000 Index
Range of acceptable deviation from investment category benchmark, minimum	0.00%
Range of acceptable deviation from investment category benchmark, maximum	3.00%

X

- Definition

The type of investment category benchmark.

+ References

No definition available.

+ Details

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

X

- Definition

The maximum range of acceptable deviation from the investment category benchmark.

+ References

No definition available.

+ Details

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

X

- Definition

The minimum range of acceptable deviation from the investment category benchmark.

+ References

No definition available.

+ Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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