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Proportionate share of income (loss) from PR Asset Portfolio 2013-1 International, LLC minority interest (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Related Party Transaction [Line Items]    
Income Loss From Equity Method Investments $ 2,301us-gaap_IncomeLossFromEquityMethodInvestments $ 16,930us-gaap_IncomeLossFromEquityMethodInvestments
PR Asset Portfolio 2013-1 International, LLC [Member]    
Related Party Transaction [Line Items]    
Income Loss From Equity Method Investments $ (4,335)us-gaap_IncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= bpop_PrAssetPortfolio20131InternationalLlcMember
$ 1,288us-gaap_IncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= bpop_PrAssetPortfolio20131InternationalLlcMember