Note Loans (Loans in non-performing status and accruing loans past-due 90 days or more by loan class) (Detail) - Non Covered Loans - USD ($) $ in Thousands	Sep. 30, 2017		Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	$ 585,928	[1]	$ 557,915	[2]
Accruing loans past-due 90 days or more	465,127		426,652
Commercial multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	1,060		870
Accruing loans past-due 90 days or more	0		0
CRE non-owner occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	26,102		25,806
Accruing loans past-due 90 days or more	0		0
CRE owner occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	90,832		103,243
Accruing loans past-due 90 days or more	0		0
Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	47,358		33,429
Accruing loans past-due 90 days or more	384		538
Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	99
Accruing loans past-due 90 days or more	0
Mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	352,315	[3],[4]	329,907	[5],[6]
Accruing loans past-due 90 days or more	443,377	[3],[4]	406,583	[5],[6]
Leasing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	2,684		3,062
Accruing loans past-due 90 days or more	0		0
Legacy
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	3,268		3,337
Accruing loans past-due 90 days or more	0		0
Consumer | Credit cards
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	13		30
Accruing loans past-due 90 days or more	20,626		18,725
Consumer | Home equity lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	11,960		4,762
Accruing loans past-due 90 days or more	48		185
Consumer | Personal
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	22,080		22,417
Accruing loans past-due 90 days or more	77		34
Consumer | Auto
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	12,259		12,320
Accruing loans past-due 90 days or more	0		0
Consumer | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	15,898		18,732
Accruing loans past-due 90 days or more	615		587
PUERTO RICO
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	548,666	[1]	532,508	[2]
Accruing loans past-due 90 days or more	465,127		426,652
PUERTO RICO | Commercial multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	1,060		664
Accruing loans past-due 90 days or more	0		0
PUERTO RICO | CRE non-owner occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	23,028		24,611
Accruing loans past-due 90 days or more	0		0
PUERTO RICO | CRE owner occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	90,346		102,771
Accruing loans past-due 90 days or more	0		0
PUERTO RICO | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	45,609		31,609
Accruing loans past-due 90 days or more	384		538
PUERTO RICO | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	99
Accruing loans past-due 90 days or more	0
PUERTO RICO | Mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	337,967	[3],[4]	318,194	[5],[6]
Accruing loans past-due 90 days or more	443,377	[3],[4]	406,583	[5],[6]
PUERTO RICO | Leasing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	2,684		3,062
Accruing loans past-due 90 days or more	0		0
PUERTO RICO | Legacy
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	0		0
Accruing loans past-due 90 days or more	0		0
PUERTO RICO | Consumer | Credit cards
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	0		0
Accruing loans past-due 90 days or more	20,626		18,725
PUERTO RICO | Consumer | Home equity lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	0		0
Accruing loans past-due 90 days or more	48		185
PUERTO RICO | Consumer | Personal
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	19,738		20,553
Accruing loans past-due 90 days or more	77		34
PUERTO RICO | Consumer | Auto
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	12,259		12,320
Accruing loans past-due 90 days or more	0		0
PUERTO RICO | Consumer | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	15,876		18,724
Accruing loans past-due 90 days or more	615		587
UNITED STATES
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	37,262	[1]	25,407	[2]
Accruing loans past-due 90 days or more	0		0
UNITED STATES | Commercial multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	0		206
Accruing loans past-due 90 days or more	0		0
UNITED STATES | CRE non-owner occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	3,074		1,195
Accruing loans past-due 90 days or more	0		0
UNITED STATES | CRE owner occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	486		472
Accruing loans past-due 90 days or more	0		0
UNITED STATES | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	1,749		1,820
Accruing loans past-due 90 days or more	0		0
UNITED STATES | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	0
Accruing loans past-due 90 days or more	0
UNITED STATES | Mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	14,348	[3],[4]	11,713	[5],[6]
Accruing loans past-due 90 days or more	0	[3],[4]	0	[5],[6]
UNITED STATES | Leasing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	0		0
Accruing loans past-due 90 days or more	0		0
UNITED STATES | Legacy
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	3,268		3,337
Accruing loans past-due 90 days or more	0		0
UNITED STATES | Consumer | Credit cards
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	13		30
Accruing loans past-due 90 days or more	0		0
UNITED STATES | Consumer | Home equity lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	11,960		4,762
Accruing loans past-due 90 days or more	0		0
UNITED STATES | Consumer | Personal
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	2,342		1,864
Accruing loans past-due 90 days or more	0		0
UNITED STATES | Consumer | Auto
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	0		0
Accruing loans past-due 90 days or more	0		0
UNITED STATES | Consumer | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	22		8
Accruing loans past-due 90 days or more	$ 0		$ 0

[1] For purposes of this table non-performing loans exclude non-performing loans held-for-sale.

[2] For purposes of this table non-performing loans exclude non-performing loans held-for-sale.

[3] It is the Corporation’s policy to report delinquent residential mortgage loans insured by FHA or guar anteed by the VA as accruing loans past due 90 days or more as opposed to non-performing since the principal repayment is insured. These balances include $ 157 million of residential mortgage loans in Puerto Rico insured by FHA or guaranteed by the VA that are no longer accruing interest as of September 30, 2017 . Furthermore, the Co rporation has approximately $ 57 million in reverse mortgage loans in Puerto Rico which are guaranteed by FHA, but which are currently not accruing interest. Due to the guaranteed nature of the loans, it is the Corporation’s policy to exclude these balances from non-performing assets .

[4] Non-covered loans of $ 192 million accounted for under ASC Subtopic 310-30 are excluded from the above table as they are considered to be performing due to the application of the accretion method, in which these loans will accrete interest income over the remaining life of the loans using estimated cash flow analysis.

[5] It is the Corporation’s policy to report delinque nt residential mortgage loans insured by FHA or guaranteed by the VA as accruing loans past due 90 days or more as opposed to non-performing since the principal repayment is insured. These balances include $ 181 million of residential mortgage loans in Puer to Rico insured by FHA or guaranteed by the VA that are no longer accruing interest as of December 31, 2016 . Furthermore, the Corporation has approximately $68 million in reverse mortgage loans in Puerto Rico which are guaranteed by FHA, but which are currently not accruing interest. Due to the guaranteed nature of the loans, it is the Corporation’s policy to exclude these balances from non-performing assets .

[6] Non-covered loans by $ 215 million accounted for under ASC Subtopic 310-30 are excluded from the above table as they are considered to be performing due to the application of the accretion method, in which these loans will accrete interest income over the remaining life of the loans using estimated cash flow analysis.