T D R that subsequently defaulted (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2012 loans	Jun. 30, 2012 loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	518	1,046
Financing Receivable Modifications That Defaulted	$ 36,975	$ 80,848
Commercial Multi Family [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	0	0
Financing Receivable Modifications That Defaulted	0	0
Commercial Real Estate Non Owner Occupied [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	2	4
Financing Receivable Modifications That Defaulted	1,791	5,496
Commercial Real Estate Owner Occupied [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	6	15
Financing Receivable Modifications That Defaulted	3,186	15,619
Commercial And Industrial Loans [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	4	12
Financing Receivable Modifications That Defaulted	3,843	4,918
Commercial Real Estate Construction Financing Receivable Member
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	0	0
Financing Receivable Modifications That Defaulted	0	0
Mortgages
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	168	330
Financing Receivable Modifications That Defaulted	25,651	49,152
Legacy [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	4	13
Financing Receivable Modifications That Defaulted	43	412
Finance Leases Portfolio Segment Member
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	0	0
Financing Receivable Modifications That Defaulted	0	0
Consumer Credit Card Financing Receivable Member
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	241	481
Financing Receivable Modifications That Defaulted	1,795	3,842
Home Equity Member
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	0	0
Financing Receivable Modifications That Defaulted	0	0
Personal [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	92	189
Financing Receivable Modifications That Defaulted	650	1,392
Consumer Loans Auto Financing Receivable Member
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	1	1
Financing Receivable Modifications That Defaulted	16	16
Consumer Other Financing Receivable Member
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	0	1
Financing Receivable Modifications That Defaulted	0	1
PUERTO RICO
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	515	1,039
Financing Receivable Modifications That Defaulted	36,656	78,181
PUERTO RICO | Commercial Multi Family [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	0	0
Financing Receivable Modifications That Defaulted	0	0
PUERTO RICO | Commercial Real Estate Non Owner Occupied [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	2	3
Financing Receivable Modifications That Defaulted	1,791	3,561
PUERTO RICO | Commercial Real Estate Owner Occupied [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	6	15
Financing Receivable Modifications That Defaulted	3,186	15,619
PUERTO RICO | Commercial And Industrial Loans [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	4	12
Financing Receivable Modifications That Defaulted	3,843	4,918
PUERTO RICO | Commercial Real Estate Construction Financing Receivable Member
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	0	0
Financing Receivable Modifications That Defaulted	0	0
PUERTO RICO | Mortgages
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	165	324
Financing Receivable Modifications That Defaulted	25,332	48,420
PUERTO RICO | Finance Leases Portfolio Segment Member
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	4	13
Financing Receivable Modifications That Defaulted	43	412
PUERTO RICO | Consumer Credit Card Financing Receivable Member
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	241	481
Financing Receivable Modifications That Defaulted	1,795	3,842
PUERTO RICO | Home Equity Member
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	0	0
Financing Receivable Modifications That Defaulted	0	0
PUERTO RICO | Personal [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	92	189
Financing Receivable Modifications That Defaulted	650	1,392
PUERTO RICO | Consumer Loans Auto Financing Receivable Member
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	1	1
Financing Receivable Modifications That Defaulted	16	16
PUERTO RICO | Consumer Other Financing Receivable Member
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	0	1
Financing Receivable Modifications That Defaulted	0	1
UNITED STATES
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	3	7
Financing Receivable Modifications That Defaulted	319	2,667
UNITED STATES | Commercial Multi Family [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	0	0
Financing Receivable Modifications That Defaulted	0	0
UNITED STATES | Commercial Real Estate Non Owner Occupied [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	0	1
Financing Receivable Modifications That Defaulted	0	1,935
UNITED STATES | Commercial Real Estate Owner Occupied [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	0	0
Financing Receivable Modifications That Defaulted	0	0
UNITED STATES | Commercial And Industrial Loans [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	0	0
Financing Receivable Modifications That Defaulted	0	0
UNITED STATES | Commercial Real Estate Construction Financing Receivable Member
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	0	0
Financing Receivable Modifications That Defaulted	0	0
UNITED STATES | Mortgages
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	3	6
Financing Receivable Modifications That Defaulted	319	732
UNITED STATES | Legacy [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	0	0
Financing Receivable Modifications That Defaulted	0	0
UNITED STATES | Consumer Credit Card Financing Receivable Member
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	0	0
Financing Receivable Modifications That Defaulted	0	0
UNITED STATES | Home Equity Member
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	0	0
Financing Receivable Modifications That Defaulted	0	0
UNITED STATES | Personal [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	0	0
Financing Receivable Modifications That Defaulted	0	0
UNITED STATES | Consumer Loans Auto Financing Receivable Member
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	0	0
Financing Receivable Modifications That Defaulted	0	0
UNITED STATES | Consumer Other Financing Receivable Member
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	0	0
Financing Receivable Modifications That Defaulted	$ 0	$ 0