Quantitative information by loan class for loans modified as T D R (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014 loans	Mar. 31, 2013 loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	857	967
Modifications, Pre-Modification Recorded Investment	$ 43,380	$ 41,546
Post Modification Recorded Investment	45,230	43,706
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	2,092	4,220
Commercial Multi Family [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	0	0
Modifications, Pre-Modification Recorded Investment	0	0
Post Modification Recorded Investment	0	0
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	0	0
Commercial Real Estate Non Owner Occupied [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	3	3
Modifications, Pre-Modification Recorded Investment	1,376	2,842
Post Modification Recorded Investment	1,454	2,300
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	(63)	(12)
Commercial Real Estate Owner Occupied [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	11	3
Modifications, Pre-Modification Recorded Investment	1,629	4,947
Post Modification Recorded Investment	1,617	4,873
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	(26)	(350)
Commercial And Industrial Loans [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	9	4
Modifications, Pre-Modification Recorded Investment	773	160
Post Modification Recorded Investment	770	161
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	9	(1)
Commercial Real Estate Construction Financing Receivable Member
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	3	0
Modifications, Pre-Modification Recorded Investment	11,358	0
Post Modification Recorded Investment	11,358	0
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	(570)	0
Mortgages [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	137	156
Modifications, Pre-Modification Recorded Investment	20,311	25,124
Post Modification Recorded Investment	21,589	27,017
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	1,133	3,450
Legacy [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	0	0
Modifications, Pre-Modification Recorded Investment	0	0
Post Modification Recorded Investment	0	0
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	0	0
Finance Leases Portfolio Segment Member
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	10	18
Modifications, Pre-Modification Recorded Investment	206	327
Post Modification Recorded Investment	207	315
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	63	103
Consumer Credit Card Financing Receivable [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	429	524
Modifications, Pre-Modification Recorded Investment	3,583	4,265
Post Modification Recorded Investment	4,091	5,146
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	627	37
Home Equity Line of Credit [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	0	0
Modifications, Pre-Modification Recorded Investment	0	0
Post Modification Recorded Investment	0	0
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	0	0
Personal [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	234	240
Modifications, Pre-Modification Recorded Investment	4,075	3,832
Post Modification Recorded Investment	4,074	3,846
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	912	993
Consumer Loans Auto Financing Receivable [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	2	0
Modifications, Pre-Modification Recorded Investment	32	0
Post Modification Recorded Investment	33	0
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	1	0
Consumer Other Financing Receivable Member
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	19	19
Modifications, Pre-Modification Recorded Investment	37	49
Post Modification Recorded Investment	37	48
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	6	0
PUERTO RICO
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	851	961
Modifications, Pre-Modification Recorded Investment	42,455	39,345
Post Modification Recorded Investment	44,166	41,632
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	2,097	4,209
PUERTO RICO | Commercial Multi Family [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	0	0
Modifications, Pre-Modification Recorded Investment	0	0
Post Modification Recorded Investment	0	0
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	0	0
PUERTO RICO | Commercial Real Estate Non Owner Occupied [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	3	1
Modifications, Pre-Modification Recorded Investment	1,376	1,248
Post Modification Recorded Investment	1,454	741
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	(63)	(10)
PUERTO RICO | Commercial Real Estate Owner Occupied [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	11	2
Modifications, Pre-Modification Recorded Investment	1,629	4,566
Post Modification Recorded Investment	1,617	4,586
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	(26)	(340)
PUERTO RICO | Commercial And Industrial Loans [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	9	4
Modifications, Pre-Modification Recorded Investment	773	160
Post Modification Recorded Investment	770	161
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	9	(1)
PUERTO RICO | Commercial Real Estate Construction Financing Receivable Member
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	3	0
Modifications, Pre-Modification Recorded Investment	11,358	0
Post Modification Recorded Investment	11,358	0
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	(570)	0
PUERTO RICO | Mortgages [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	131	153
Modifications, Pre-Modification Recorded Investment	19,386	24,898
Post Modification Recorded Investment	20,525	26,789
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	1,138	3,427
PUERTO RICO | Finance Leases Portfolio Segment Member
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	10	18
Modifications, Pre-Modification Recorded Investment	206	327
Post Modification Recorded Investment	207	315
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	63	103
PUERTO RICO | Consumer Credit Card Financing Receivable [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	429	524
Modifications, Pre-Modification Recorded Investment	3,583	4,265
Post Modification Recorded Investment	4,091	5,146
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	627	37
PUERTO RICO | Home Equity Line of Credit [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	0	0
Modifications, Pre-Modification Recorded Investment	0	0
Post Modification Recorded Investment	0	0
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	0	0
PUERTO RICO | Personal [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	234	240
Modifications, Pre-Modification Recorded Investment	4,075	3,832
Post Modification Recorded Investment	4,074	3,846
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	912	993
PUERTO RICO | Consumer Loans Auto Financing Receivable [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	2	0
Modifications, Pre-Modification Recorded Investment	32	0
Post Modification Recorded Investment	33	0
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	1	0
PUERTO RICO | Consumer Other Financing Receivable Member
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	19	19
Modifications, Pre-Modification Recorded Investment	37	49
Post Modification Recorded Investment	37	48
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	6	0
UNITED STATES
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	6	6
Modifications, Pre-Modification Recorded Investment	925	2,201
Post Modification Recorded Investment	1,064	2,074
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	(5)	11
UNITED STATES | Commercial Multi Family [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	0	0
Modifications, Pre-Modification Recorded Investment	0	0
Post Modification Recorded Investment	0	0
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	0	0
UNITED STATES | Commercial Real Estate Non Owner Occupied [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	0	2
Modifications, Pre-Modification Recorded Investment	0	1,594
Post Modification Recorded Investment	0	1,559
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	0	(2)
UNITED STATES | Commercial Real Estate Owner Occupied [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	0	1
Modifications, Pre-Modification Recorded Investment	0	381
Post Modification Recorded Investment	0	287
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	0	(10)
UNITED STATES | Commercial And Industrial Loans [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	0	0
Modifications, Pre-Modification Recorded Investment	0	0
Post Modification Recorded Investment	0	0
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	0	0
UNITED STATES | Commercial Real Estate Construction Financing Receivable Member
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	0	0
Modifications, Pre-Modification Recorded Investment	0	0
Post Modification Recorded Investment	0	0
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	0	0
UNITED STATES | Mortgages [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	6	3
Modifications, Pre-Modification Recorded Investment	925	226
Post Modification Recorded Investment	1,064	228
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	(5)	23
UNITED STATES | Legacy [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	0	0
Modifications, Pre-Modification Recorded Investment	0	0
Post Modification Recorded Investment	0	0
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	0	0
UNITED STATES | Consumer Credit Card Financing Receivable [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	0	0
Modifications, Pre-Modification Recorded Investment	0	0
Post Modification Recorded Investment	0	0
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	0	0
UNITED STATES | Home Equity Line of Credit [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	0	0
Modifications, Pre-Modification Recorded Investment	0	0
Post Modification Recorded Investment	0	0
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	0	0
UNITED STATES | Personal [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	0	0
Modifications, Pre-Modification Recorded Investment	0	0
Post Modification Recorded Investment	0	0
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	0	0
UNITED STATES | Consumer Loans Auto Financing Receivable [Member]
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	0	0
Modifications, Pre-Modification Recorded Investment	0	0
Post Modification Recorded Investment	0	0
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	0	0
UNITED STATES | Consumer Other Financing Receivable Member
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Modifications Number Of Contracts	0	0
Modifications, Pre-Modification Recorded Investment	0	0
Post Modification Recorded Investment	0	0
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	$ 0	$ 0