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Loans and Asset Quality Information (Schedule of Applied Cost Recovery Method of Purchased Impaired Loans) (Details) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2015 | Dec. 31, 2014
Purchased impaired loans (substantially all of which are covered loans) |  |
Balance, beginning, carrying value | $ 2,597 | $ 3,142
Change due to payments received | $ (211) | (826)
Change due to loan charge-off |  | (31)
Other |  | 312
Balance, ending, carrying value | $ 2,386 | 2,597
Contractual Principal Receivable [Member] |  |
Purchased impaired loans (substantially all of which are covered loans) |  |
Balance, beginning, contractual principal | 5,859 | 6,263
Change due to payments received | (99) | (599)
Change due to loan charge-off |  | (2)
Other | (3) | 197
Balance, ending, contractual principal | 5,757 | 5,859
Fair Value Adjustment Write Down [Member] |  |
Purchased impaired loans (substantially all of which are covered loans) |  |
Balance, beginning, FMV | 3,262 | 3,121
Change due to payments received | 112 | 227
Change due to loan charge-off |  | 29
Other | (3) | (115)
Balance, ending, FMV | $ 3,371 | $ 3,262

X
- Definition Amount of change due to a loan write-off of the allowance for loans. + References No definition available. + Details
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Namespace Prefix: | fbp_
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Balance Type: | credit
Period Type: | duration

X
- Definition The decrease in amounts due to payments received. + References No definition available. + Details
Name: | fbp_ChangeDueToPaymentsReceived
Namespace Prefix: | fbp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of fair value adjustment write down (nonaccretabe difference) of contractual principal receiavble. + References No definition available. + Details
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Namespace Prefix: | fbp_
Data Type: | xbrli:monetaryItemType
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X
- Definition Amount of unpaid principal balance of impaired purchased loans with related allowance for credit losses and without related allowance for credit losses. + References No definition available. + Details
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Namespace Prefix: | fbp_
Data Type: | xbrli:monetaryItemType
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X
- Definition The carrying value of impaired purchased loans (includes covered and non-covered). + References No definition available. + Details
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Namespace Prefix: | fbp_
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Period Type: | instant

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Namespace Prefix: | fbp_
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Balance Type: | debit
Period Type: | duration

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- Details
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- Details
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