T D R that subsequently defaulted (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013 loans	Jun. 30, 2012 loans	Jun. 30, 2013 loans	Jun. 30, 2012 loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	273	518	517	1,046
Financing Receivable Modifications That Defaulted	$ 19,604	$ 36,975	$ 32,287	$ 80,848
Commercial Multi Family [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	0	0	0	0
Financing Receivable Modifications That Defaulted	0	0	0	0
Commercial Real Estate Non Owner Occupied [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	0	2	1	4
Financing Receivable Modifications That Defaulted	0	1,791	1,139	5,496
Commercial Real Estate Owner Occupied [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	2	6	2	15
Financing Receivable Modifications That Defaulted	5,127	3,186	5,127	15,619
Commercial And Industrial Loans [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	1	4	2	12
Financing Receivable Modifications That Defaulted	504	3,843	1,436	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	0	0
Financing Receivable Modifications That Defaulted	0	0	0	0
Mortgages
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	68	168	131	330
Financing Receivable Modifications That Defaulted	11,730	25,651	20,601	49,152
Legacy [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	3	0	10	0
Financing Receivable Modifications That Defaulted	21	0	65	0
Finance Leases Portfolio Segment Member
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	0	4	0	13
Financing Receivable Modifications That Defaulted	0	43	0	412
Consumer Credit Card Financing Receivable [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	169	241	300	481
Financing Receivable Modifications That Defaulted	1,807	1,795	2,927	3,842
Home Equity Line of Credit [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	0	0	0	0
Financing Receivable Modifications That Defaulted	0	0	0	0
Personal [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	30	92	71	189
Financing Receivable Modifications That Defaulted	415	650	992	1,392
Consumer Loans Auto Financing Receivable [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	0	1	0	1
Financing Receivable Modifications That Defaulted	0	16	0	16
Consumer Other Financing Receivable Member
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	0	0	0	1
Financing Receivable Modifications That Defaulted	0	0	0	1
PUERTO RICO
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	273	515	516	1,039
Financing Receivable Modifications That Defaulted	19,604	36,656	31,148	78,181
PUERTO RICO | Commercial Multi Family [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	0	0	0	0
Financing Receivable Modifications That Defaulted	0	0	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	0	2	0	3
Financing Receivable Modifications That Defaulted	0	1,791	0	3,561
PUERTO RICO | Commercial Real Estate Owner Occupied [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	2	6	2	15
Financing Receivable Modifications That Defaulted	5,127	3,186	5,127	15,619
PUERTO RICO | Commercial And Industrial Loans [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	1	4	2	12
Financing Receivable Modifications That Defaulted	504	3,843	1,436	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	0	0
Financing Receivable Modifications That Defaulted	0	0	0	0
PUERTO RICO | Mortgages
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	68	165	131	324
Financing Receivable Modifications That Defaulted	11,730	25,332	20,601	48,420
PUERTO RICO | Finance Leases Portfolio Segment Member
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	3	4	10	13
Financing Receivable Modifications That Defaulted	21	43	65	412
PUERTO RICO | Consumer Credit Card Financing Receivable [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	169	241	300	481
Financing Receivable Modifications That Defaulted	1,807	1,795	2,927	3,842
PUERTO RICO | Home Equity Line of Credit [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	0	0	0	0
Financing Receivable Modifications That Defaulted	0	0	0	0
PUERTO RICO | Personal [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	30	92	71	189
Financing Receivable Modifications That Defaulted	415	650	992	1,392
PUERTO RICO | Consumer Loans Auto Financing Receivable [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	0	1	0	1
Financing Receivable Modifications That Defaulted	0	16	0	16
PUERTO RICO | Consumer Other Financing Receivable Member
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	0	0	0	1
Financing Receivable Modifications That Defaulted	0	0	0	1
UNITED STATES
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	0	3	1	7
Financing Receivable Modifications That Defaulted	0	319	1,139	2,667
UNITED STATES | Commercial Multi Family [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	0	0	0	0
Financing Receivable Modifications That Defaulted	0	0	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	0	1	1
Financing Receivable Modifications That Defaulted	0	0	1,139	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	0	0
Financing Receivable Modifications That Defaulted	0	0	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	0	0
Financing Receivable Modifications That Defaulted	0	0	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	0	0
Financing Receivable Modifications That Defaulted	0	0	0	0
UNITED STATES | Mortgages
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	0	3	0	6
Financing Receivable Modifications That Defaulted	0	319	0	732
UNITED STATES | Legacy [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	0	0	0	0
Financing Receivable Modifications That Defaulted	0	0	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	0	0
Financing Receivable Modifications That Defaulted	0	0	0	0
UNITED STATES | Home Equity Line of Credit [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	0	0	0	0
Financing Receivable Modifications That Defaulted	0	0	0	0
UNITED STATES | Personal [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number of Contracts that Default	0	0	0	0
Financing Receivable Modifications That Defaulted	0	0	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	0	0
Financing Receivable Modifications That Defaulted	0	0	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	0	0
Financing Receivable Modifications That Defaulted	$ 0	$ 0	$ 0	$ 0