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v3.20.4

Borrowings - Maximum aggregate balance of federal funds purchased and repurchase agreements (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Debt Disclosure [Abstract] |  |
Maximum aggregate balance outstanding at any month-end | $ 195,498 | $ 281,833
Average montly aggregate balance outstanding | $ 143,718 | $ 222,565
Weighted average interest rate for the year | 1.63% | 2.64%
Weighted average interest rate at December 31 | 1.11% | 2.50%

X
- Definition Reflects the calculation of the average interest rate weighted by the amount of fed funds purchased and assets sold under agreements to reurchase outstanding at that time. + References No definition available. + Details
Name: | bpop_FedFundAssetsSoldWeightedAverageInterestRateDecember
Namespace Prefix: | bpop_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Reflects the calculation of the average interest rate weighted by the amount of fed funds purchased and assets sold under agreements to reurchase outstanding during the year. + References No definition available. + Details
Name: | bpop_FedFundAssetsSoldWeightedAverageInterestRateForYear
Namespace Prefix: | bpop_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition For federal funds purchased and assets sold under agreements to repurchase, maximum month-end borrowings during the period. + References No definition available. + Details
Name: | bpop_FedFundsAssetSoldMaximumAggregateBalanceOutstandingMonthEnd
Namespace Prefix: | bpop_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition For federal funds purchased and assets sold under agreements to repurchase, average borrowings during the period. + References No definition available. + Details
Name: | bpop_FedFundsAssetsSoldAverageMonthlyAggregateBalanceOutstanding
Namespace Prefix: | bpop_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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