XML 79 R68.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Fair Value (Narrative) (Details) - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2016 | Sep. 30, 2015
Fair Value [Abstract] |  |
Increase in fair value of securities available for sale | $ 3,128 | $ (153)
Tax expense of increase in fair value of securities available for sale | $ (1,222) | $ 60

X
- References No definition available. + Details
Name: | fbp_FairValueDisclosureAbstract
Namespace Prefix: | fbp_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The value of unrealized holding gains (losses) net of reclassification adjustments. + References No definition available. + Details
Name: | fbp_UnrealizedHoldingGainsLossesNetOfReclassifications
Namespace Prefix: | fbp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Tax expense (benefit) on unrealized holding gains (losses) net of reclassification adjustments. + References No definition available. + Details
Name: | fbp_UnrealizedHoldingGainsLossesNetOfReclassificationsTaxExpenseBenefit
Namespace Prefix: | fbp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration