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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
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Related Party Transaction [Line Items]      
Income Loss From Equity Method Investments $ 39,578us-gaap_IncomeLossFromEquityMethodInvestments $ 42,873us-gaap_IncomeLossFromEquityMethodInvestments $ 73,478us-gaap_IncomeLossFromEquityMethodInvestments
PR Asset Portfolio 2013-1 International, LLC [Member]      
Related Party Transaction [Line Items]      
Income Loss From Equity Method Investments $ 745us-gaap_IncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= bpop_PrAssetPortfolio20131InternationalLlcMember
$ (1,979)us-gaap_IncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= bpop_PrAssetPortfolio20131InternationalLlcMember