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Business combination - Additional Information (Detail)	Jun. 30, 2012 days
Business Acquisition [Line Items]
True Up Payment Term	45

Term to make true-up payment under the FDIC loss sharing agreements.

No definition available.

Name:	bpop_TrueUpPaymentTerm
Namespace Prefix:	bpop_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Name:	us-gaap_BusinessAcquisitionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration