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Acquisition (Narrative) (Details) (USD $)	0 Months Ended
	Mar. 22, 2013	Aug. 24, 2012
Acquisitions [Abstract]
Name of purchased branch	Four Oaks Bank & Trust Company	Gateway Bank & Trust Co.
Date of acquisition	Mar. 22, 2013	Aug. 24, 2012
Assumption of branch deposits	$ 57,000,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities	$ 9,000,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
Deposit premium of the branch	586,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles	107,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
Performing loans acquired	$ 16,000,000fbp_FairValueDisclosurePerformingLoansAcquired

X

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents investments in performing loans acquired.

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- Definition

Date when the business acquisition agreement was executed, in CCYY-MM-DD format.

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- Definition

Name of the acquired entity.

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-Name Accounting Standards Codification

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- Definition

The amount of identifiable intangible assets recognized as of the acquisition date.

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- Definition

Amount of liabilities assumed at the acquisition date.

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