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Corporation's risk-based capital and leverage ratios (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Corporate [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Capital $ 4,122,238us-gaap_Capital
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
$ 4,761,555us-gaap_Capital
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
Capital to Risk Weighted Assets 19.41%us-gaap_CapitalToRiskWeightedAssets
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
20.42%us-gaap_CapitalToRiskWeightedAssets
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
Tier One Risk Based Capital 3,849,891us-gaap_TierOneRiskBasedCapital
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
4,464,742us-gaap_TierOneRiskBasedCapital
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
Tier One Risk Based Capital to Risk Weighted Assets 18.13%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
19.15%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
Tier One Leverage Capital 3,849,891us-gaap_TierOneLeverageCapital
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
4,464,742us-gaap_TierOneLeverageCapital
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
Tier One Leverage Capital to Average Assets 11.94%us-gaap_TierOneLeverageCapitalToAverageAssets
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
12.85%us-gaap_TierOneLeverageCapitalToAverageAssets
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
Corporate [Member] | Capital Adequacy Minimum Requirement Total Capital [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Capital Required for Capital Adequacy 1,698,712us-gaap_CapitalRequiredForCapitalAdequacy
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdequacyMinimumRequirementTotalCapitalMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
1,865,494us-gaap_CapitalRequiredForCapitalAdequacy
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdequacyMinimumRequirementTotalCapitalMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
Capital Required for Capital Adequacy to Risk Weighted Assets 8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdequacyMinimumRequirementTotalCapitalMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdequacyMinimumRequirementTotalCapitalMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
Corporate [Member] | Capital Adequacy Minimum Requirement Tier I Capital To Risk Weighted Asset [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Tier One Risk Based Capital Required for Capital Adequacy 849,356us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdequacyMinimumRequirementTierICapitalToRiskWeightedAssetMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
932,747us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdequacyMinimumRequirementTierICapitalToRiskWeightedAssetMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets 4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdequacyMinimumRequirementTierICapitalToRiskWeightedAssetMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdequacyMinimumRequirementTierICapitalToRiskWeightedAssetMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
Corporate [Member] | Capital Adecuacy Minimum Requirement Tier I Capital To Average Asset 3 [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Tier One Leverage Capital Required for Capital Adequacy 967,505us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdecuacyMinimumRequirementTierICapitalToAverageAsset3Member
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
1,042,384us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdecuacyMinimumRequirementTierICapitalToAverageAsset3Member
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
Tier One Leverage Capital Required for Capital Adequacy to Average Assets 3.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdecuacyMinimumRequirementTierICapitalToAverageAsset3Member
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
3.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdecuacyMinimumRequirementTierICapitalToAverageAsset3Member
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
Corporate [Member] | Capital Adequacy Minimum Requirement Tier I Capital To Average Asset 4 [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Tier One Leverage Capital Required for Capital Adequacy 1,290,007us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdequacyMinimumRequirementTierICapitalToAverageAsset4Member
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
1,389,845us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdequacyMinimumRequirementTierICapitalToAverageAsset4Member
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
Tier One Leverage Capital Required for Capital Adequacy to Average Assets 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdequacyMinimumRequirementTierICapitalToAverageAsset4Member
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdequacyMinimumRequirementTierICapitalToAverageAsset4Member
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
Banco Popular De Puerto Rico [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Capital 2,973,500us-gaap_Capital
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularDePuertoRicoMember
2,607,018us-gaap_Capital
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularDePuertoRicoMember
Capital to Risk Weighted Assets 17.00%us-gaap_CapitalToRiskWeightedAssets
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularDePuertoRicoMember
14.76%us-gaap_CapitalToRiskWeightedAssets
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularDePuertoRicoMember
Tier One Risk Based Capital 2,749,051us-gaap_TierOneRiskBasedCapital
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularDePuertoRicoMember
2,381,347us-gaap_TierOneRiskBasedCapital
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularDePuertoRicoMember
Tier One Risk Based Capital to Risk Weighted Assets 15.71%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularDePuertoRicoMember
13.48%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularDePuertoRicoMember
Tier One Leverage Capital 2,749,051us-gaap_TierOneLeverageCapital
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularDePuertoRicoMember
2,381,347us-gaap_TierOneLeverageCapital
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularDePuertoRicoMember
Tier One Leverage Capital to Average Assets 10.63%us-gaap_TierOneLeverageCapitalToAverageAssets
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularDePuertoRicoMember
9.21%us-gaap_TierOneLeverageCapitalToAverageAssets
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularDePuertoRicoMember
Banco Popular De Puerto Rico [Member] | Capital Adequacy Minimum Requirement Total Capital [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Capital Required for Capital Adequacy 1,399,664us-gaap_CapitalRequiredForCapitalAdequacy
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdequacyMinimumRequirementTotalCapitalMember
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularDePuertoRicoMember
1,413,292us-gaap_CapitalRequiredForCapitalAdequacy
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdequacyMinimumRequirementTotalCapitalMember
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularDePuertoRicoMember
Capital Required for Capital Adequacy to Risk Weighted Assets 8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdequacyMinimumRequirementTotalCapitalMember
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularDePuertoRicoMember
8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdequacyMinimumRequirementTotalCapitalMember
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularDePuertoRicoMember
Banco Popular De Puerto Rico [Member] | Capital Adequacy Minimum Requirement Tier I Capital To Risk Weighted Asset [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Tier One Risk Based Capital Required for Capital Adequacy 699,832us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdequacyMinimumRequirementTierICapitalToRiskWeightedAssetMember
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularDePuertoRicoMember
706,646us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdequacyMinimumRequirementTierICapitalToRiskWeightedAssetMember
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularDePuertoRicoMember
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets 4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdequacyMinimumRequirementTierICapitalToRiskWeightedAssetMember
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularDePuertoRicoMember
4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdequacyMinimumRequirementTierICapitalToRiskWeightedAssetMember
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularDePuertoRicoMember
Banco Popular De Puerto Rico [Member] | Capital Adecuacy Minimum Requirement Tier I Capital To Average Asset 3 [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Tier One Leverage Capital Required for Capital Adequacy 775,566us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdecuacyMinimumRequirementTierICapitalToAverageAsset3Member
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularDePuertoRicoMember
775,562us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdecuacyMinimumRequirementTierICapitalToAverageAsset3Member
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularDePuertoRicoMember
Tier One Leverage Capital Required for Capital Adequacy to Average Assets 3.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdecuacyMinimumRequirementTierICapitalToAverageAsset3Member
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularDePuertoRicoMember
3.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdecuacyMinimumRequirementTierICapitalToAverageAsset3Member
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularDePuertoRicoMember
Banco Popular De Puerto Rico [Member] | Capital Adequacy Minimum Requirement Tier I Capital To Average Asset 4 [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Tier One Leverage Capital Required for Capital Adequacy 1,034,089us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdequacyMinimumRequirementTierICapitalToAverageAsset4Member
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularDePuertoRicoMember
1,034,083us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdequacyMinimumRequirementTierICapitalToAverageAsset4Member
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularDePuertoRicoMember
Tier One Leverage Capital Required for Capital Adequacy to Average Assets 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdequacyMinimumRequirementTierICapitalToAverageAsset4Member
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularDePuertoRicoMember
4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdequacyMinimumRequirementTierICapitalToAverageAsset4Member
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularDePuertoRicoMember
Banco Popular North America [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Capital 1,216,065us-gaap_Capital
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularNorthAmericaMember
1,400,740us-gaap_Capital
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularNorthAmericaMember
Capital to Risk Weighted Assets 35.77%us-gaap_CapitalToRiskWeightedAssets
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularNorthAmericaMember
25.47%us-gaap_CapitalToRiskWeightedAssets
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularNorthAmericaMember
Tier One Risk Based Capital 1,182,899us-gaap_TierOneRiskBasedCapital
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularNorthAmericaMember
1,331,471us-gaap_TierOneRiskBasedCapital
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularNorthAmericaMember
Tier One Risk Based Capital to Risk Weighted Assets 34.80%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularNorthAmericaMember
24.21%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularNorthAmericaMember
Tier One Leverage Capital 1,182,899us-gaap_TierOneLeverageCapital
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularNorthAmericaMember
1,331,471us-gaap_TierOneLeverageCapital
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularNorthAmericaMember
Tier One Leverage Capital to Average Assets 20.01%us-gaap_TierOneLeverageCapitalToAverageAssets
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularNorthAmericaMember
15.92%us-gaap_TierOneLeverageCapitalToAverageAssets
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularNorthAmericaMember
Banco Popular North America [Member] | Capital Adequacy Minimum Requirement Total Capital [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Capital Required for Capital Adequacy 271,952us-gaap_CapitalRequiredForCapitalAdequacy
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdequacyMinimumRequirementTotalCapitalMember
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularNorthAmericaMember
439,908us-gaap_CapitalRequiredForCapitalAdequacy
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdequacyMinimumRequirementTotalCapitalMember
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularNorthAmericaMember
Capital Required for Capital Adequacy to Risk Weighted Assets 8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdequacyMinimumRequirementTotalCapitalMember
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularNorthAmericaMember
8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdequacyMinimumRequirementTotalCapitalMember
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularNorthAmericaMember
Banco Popular North America [Member] | Capital Adequacy Minimum Requirement Tier I Capital To Risk Weighted Asset [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Tier One Risk Based Capital Required for Capital Adequacy 135,976us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdequacyMinimumRequirementTierICapitalToRiskWeightedAssetMember
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularNorthAmericaMember
219,954us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdequacyMinimumRequirementTierICapitalToRiskWeightedAssetMember
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularNorthAmericaMember
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets 4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdequacyMinimumRequirementTierICapitalToRiskWeightedAssetMember
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularNorthAmericaMember
4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdequacyMinimumRequirementTierICapitalToRiskWeightedAssetMember
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularNorthAmericaMember
Banco Popular North America [Member] | Capital Adecuacy Minimum Requirement Tier I Capital To Average Asset 3 [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Tier One Leverage Capital Required for Capital Adequacy 177,376us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdecuacyMinimumRequirementTierICapitalToAverageAsset3Member
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularNorthAmericaMember
250,931us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdecuacyMinimumRequirementTierICapitalToAverageAsset3Member
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularNorthAmericaMember
Tier One Leverage Capital Required for Capital Adequacy to Average Assets 3.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdecuacyMinimumRequirementTierICapitalToAverageAsset3Member
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularNorthAmericaMember
3.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdecuacyMinimumRequirementTierICapitalToAverageAsset3Member
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularNorthAmericaMember
Banco Popular North America [Member] | Capital Adequacy Minimum Requirement Tier I Capital To Average Asset 4 [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Tier One Leverage Capital Required for Capital Adequacy $ 236,502us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdequacyMinimumRequirementTierICapitalToAverageAsset4Member
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularNorthAmericaMember
$ 334,575us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdequacyMinimumRequirementTierICapitalToAverageAsset4Member
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularNorthAmericaMember
Tier One Leverage Capital Required for Capital Adequacy to Average Assets 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdequacyMinimumRequirementTierICapitalToAverageAsset4Member
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularNorthAmericaMember
4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets
/ bpop_CapitalAdequacyMinimumRequirementAxis
= bpop_CapitalAdequacyMinimumRequirementTierICapitalToAverageAsset4Member
/ us-gaap_StatementBusinessSegmentsAxis
= bpop_BancoPopularNorthAmericaMember