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Income Taxes (Narrative) (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Income Tax Disclosure [Abstract]    
Deferred income tax expense $ 11,316,000us-gaap_DeferredIncomeTaxExpenseBenefit $ 2,736,000us-gaap_DeferredIncomeTaxExpenseBenefit
Pre-1988 tax bad debt reserve $ 6,869,000fbp_Pre1988TaxBadDebtReserve $ 6,869,000fbp_Pre1988TaxBadDebtReserve
Reduction in state income tax rate (as a percent) 5.00%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes