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Commitments, Contingencies, and Concentrations of Credit Risk (Schedule of Maximum Credit Risk for Securities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014
Freddie Mac - mortgage-backed securities [Member]
Amortized cost, Available for sale and held to maturity	$ 88,585fbp_AmortizedCostAvailableForSaleAndHeldToMaturity / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = fbp_FreddieMacMortgageBackedSecuritiesMember
Fair value, Available for sale and held to maturity	88,815fbp_FairValueAvailableForSaleAndHeldToMaturity / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = fbp_FreddieMacMortgageBackedSecuritiesMember
Fannie Mae - mortgage-backed securities [Member]
Amortized cost, Available for sale and held to maturity	63,032fbp_AmortizedCostAvailableForSaleAndHeldToMaturity / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = fbp_FannieMaeMortgageBackedSecuritiesMember
Fair value, Available for sale and held to maturity	63,013fbp_FairValueAvailableForSaleAndHeldToMaturity / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = fbp_FannieMaeMortgageBackedSecuritiesMember
Ginnie Mae - mortgage-backed securities [Member]
Amortized cost, Available for sale and held to maturity	50,407fbp_AmortizedCostAvailableForSaleAndHeldToMaturity / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Fair value, Available for sale and held to maturity	50,610fbp_FairValueAvailableForSaleAndHeldToMaturity / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Small Business Administration [Member]
Amortized cost, Available for sale and held to maturity	52,696fbp_AmortizedCostAvailableForSaleAndHeldToMaturity / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = fbp_SmallBusinessAdministrationMember
Fair value, Available for sale and held to maturity	51,656fbp_FairValueAvailableForSaleAndHeldToMaturity / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = fbp_SmallBusinessAdministrationMember
Federal Farm Credit bonds [Member]
Amortized cost, Available for sale and held to maturity	17,546fbp_AmortizedCostAvailableForSaleAndHeldToMaturity / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = fbp_FederalFarmCreditBondsMember
Fair value, Available for sale and held to maturity	17,531fbp_FairValueAvailableForSaleAndHeldToMaturity / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = fbp_FederalFarmCreditBondsMember
Federal Home Loan Bank System - bonds [Member]
Amortized cost, Available for sale and held to maturity	10,000fbp_AmortizedCostAvailableForSaleAndHeldToMaturity / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = fbp_FederalHomeLoanBankSystemBondsMember
Fair value, Available for sale and held to maturity	9,990fbp_FairValueAvailableForSaleAndHeldToMaturity / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = fbp_FederalHomeLoanBankSystemBondsMember
Federal Home Loan Bank of Atlanta - common stock [Member]
Amortized cost, Available for sale and held to maturity	6,016fbp_AmortizedCostAvailableForSaleAndHeldToMaturity / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = fbp_FederalHomeLoanBankSystemCommonStockMember
Fair value, Available for sale and held to maturity	6,016fbp_FairValueAvailableForSaleAndHeldToMaturity / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = fbp_FederalHomeLoanBankSystemCommonStockMember
Craven County, North Carolina municipal bond [Member]
Amortized cost, Available for sale and held to maturity	3,598fbp_AmortizedCostAvailableForSaleAndHeldToMaturity / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = fbp_CravenCountyNorthCarolinaMunicipalBondMember
Fair value, Available for sale and held to maturity	3,849fbp_FairValueAvailableForSaleAndHeldToMaturity / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = fbp_CravenCountyNorthCarolinaMunicipalBondMember
Spartanburg, South Carolina Sanitary Sewer District municipal bond [Member]
Amortized cost, Available for sale and held to maturity	3,279fbp_AmortizedCostAvailableForSaleAndHeldToMaturity / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = fbp_USGovernmentSponsoredEnterprisesDebtSecurities1Member
Fair value, Available for sale and held to maturity	3,542fbp_FairValueAvailableForSaleAndHeldToMaturity / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = fbp_USGovernmentSponsoredEnterprisesDebtSecurities1Member
South Carolina State municipal bond [Member]
Amortized cost, Available for sale and held to maturity	2,152fbp_AmortizedCostAvailableForSaleAndHeldToMaturity / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = fbp_USGovernmentSponsoredEnterprisesDebtSecurities3Member
Fair value, Available for sale and held to maturity	2,361fbp_FairValueAvailableForSaleAndHeldToMaturity / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = fbp_USGovernmentSponsoredEnterprisesDebtSecurities3Member
Virginia State Housing Authority municipal bond [Member]
Amortized cost, Available for sale and held to maturity	2,098fbp_AmortizedCostAvailableForSaleAndHeldToMaturity / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = fbp_USGovernmentSponsoredEnterprisesDebtSecurities4Member
Fair value, Available for sale and held to maturity	$ 2,277fbp_FairValueAvailableForSaleAndHeldToMaturity / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = fbp_USGovernmentSponsoredEnterprisesDebtSecurities4Member

X

- Definition

This item represents the cost of debt and equity securities, available for sale and held to maturity, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References

No definition available.

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X

- Definition

Amount of investment in debt and equity securities categorized a available for sale and held to maturity.

+ References

No definition available.

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