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Fair Value of Financial Instruments (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Fair Value Of Financial Instruments [Abstract]
Increase (decrease) in fair value of securities available for sale	$ 1,329,000fbp_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax1	$ (5,311,000)fbp_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax1
Tax benefit (expense) of increase in the fair value of securities available for sale	518,000us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	(2,072,000)us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent
Write-down of noncovered foreclosed properties			$ 10,600,000fbp_WritedownOfNoncoveredForeclosedProperties
Percentage reduction in carrying value			29.00%fbp_PercentageReductionInCarryingValue

X

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- Definition

Amount after tax and reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) loss.

+ References

No definition available.

+ Details

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- Definition

The percentage reduction in carrying value relating to the writedown of noncovered foreclosed properties.

+ References

No definition available.

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- Definition

The amount of noncovered foreclosed properties written down.

+ References

No definition available.

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- Definition

Amount of tax expense (benefit), after reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities, attributable to parent entity. Excludes amounts related to other than temporary impairment (OTTI) loss.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 45

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569643-111683



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 45

-Paragraph 19

-URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 50

-Paragraph 1A

-Subparagraph (c)(3)

-URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684

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