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Note FDIC loss share asset (Activity in the FDIC loss share indemnification asset) (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Mar. 31, 2018
Disclosure Activity In The F D I C Loss Share Indemnification Asset [Abstract] |  |  |  |  |
Beginning Balance | $ 0 | $ 53,070 | $ 46,316 | $ 69,334 |
FDIC loss-sharing termination agreement | 0 | 0 | (45,659) | 0 |
Accretion (amortization) | 0 | 567 | (934) | (62) |
Credit impairment losses (reversal) to be covered under loss sharing agreements | 0 | (329) | 104 | 1,945 |
Reimbursable expenses | 0 | 588 | 537 | 2,232 |
Net payment from FDIC under loss-sharing agreements | 0 | (4,502) | (364) | (18,505) |
Other adjustments attributable to FDIC loss sharing agreements | 0 | 0 | 0 | (5,550) |
Ending Balance | 0 | 49,394 | 0 | 49,394 |
Balance due to the FDIC for recoveries on covered assets | 0 | (924) | 0 | (924) | $ 1,100
FDIC loss-share asset net | $ 0 | $ 48,470 | $ 0 | $ 48,470 | $ 45,600

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- Definition Balance due to the FDIC for recoveries on covered assets. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Disclosure - Activity in the FDIC Loss Share Indemnification Asset [Abstract] + References No definition available. + Details
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- Definition Carrying amount of receivable assets originating from the indemnification agreement with the Federal Deposit Insurance Corporation (FDIC), in which the FDIC is to partially cover losses. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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X
- Definition Amount of increases (decreases) to the indemnification asset due to additional estimated losses assumed by the Federal Deposit Insurance Corporation (FDIC), relating to loss sharing agreements with the FDIC. + References No definition available. + Details
Name: | bpop_FDICIndemnificationAssetAdditionalEstimatedLoss
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- Definition Amount of other adjustments relating to loss sharing agreements with the Federal Deposit Insurance Corporation (FDIC). + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of decreases to the indemnification asset due to net cash payments received relating to loss sharing agreements with the Federal Deposit Insurance Corporation (FDIC). + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition Termination Agreement with the FDIC to terminate the Corporation's loss share arrangements ahead of their contractual maturities. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition 80% mirror accounting on expenses relating to loss sharing agreements with the Federal Deposit Insurance Corporation (FDIC). + References No definition available. + Details
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- Definition Increases or decreases to the indemnification asset due to accretion (amortization) of the loan discount relating to loss sharing agreements with the Federal Deposit Insurance Corporation (FDIC). + References No definition available. + Details
Name: | bpop_FdicIndemnificationAssetAccretionAmortizationOfDiscount
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- Definition Carrying amount of receivable assets originating from the indemnification agreement with the Federal Deposit Insurance Corporation (FDIC), in which the FDIC is to partially cover losses, net of recoveries on covered assets. + References No definition available. + Details
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