XML 43 R32.htm IDEA: XBRL DOCUMENT
v3.19.1

Accounting Policies (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 USD ($)
Accounting Policies [Abstract] |
Reclassified amount between Accumulated Other Comprehensive Income and Retained Earnings |
Lease liabilities and right-of-use assets | $ 19,400

X
- Definition Reclassified amount between accumulated other comprehensive income and retained earnings. + References No definition available. + Details
Name: | fbp_ReclassifiedAmountBetweenAccumulatedOtherComprehensiveIncomeAndRetainedEarnings
Namespace Prefix: | fbp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

X
- Definition Amount of increase in right-of-use asset obtained in exchange for operating lease liability. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(2) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 + Details
Name: | us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration