Condensed Consolidating Statement of Condition (Detail) - USD ($) $ in Thousands	Mar. 31, 2017		Dec. 31, 2016		Mar. 31, 2016	Dec. 31, 2015
Assets
Cash And Due From Banks	$ 340,225		$ 362,394
Money market investments	3,653,347		2,890,217
Trading account securities, at fair value	50,985		59,805
Investment securities available-for-sale, at fair value	9,197,527	[1]	8,209,806	[2]
Investment securities held-to-maturity, at amortized cost	96,326	[3]	98,101	[4]
Other investment securities, at lower of cost or realizable value	166,286		167,818
Investment in subsidiaries	0		0
Loans held-for-sale, at lower of cost or fair value	85,309		88,821
Loans held-in-portfolio:
Loans not covered under loss-sharing agreements with the FDIC	22,858,556		22,895,172
Loans covered under loss-sharing agreements with the FDIC	551,980		572,878
Less - Unearned income	123,835		121,425
Allowance for loan losses	544,496		540,651		$ 538,472	$ 537,111
Total loans held-in-portfolio, net	22,742,205		22,805,974
FDIC loss-share asset	58,793		69,334
Premises and equipment, net	548,995		543,981
Accrued income receivable	128,018		138,042
Mortgage servicing assets, at fair value	193,698		196,889		205,051	211,405
Other assets	2,111,806		2,145,510
Goodwill	627,294		627,294		631,095	626,388
Other intangible assets	42,706		45,050
Total assets	40,259,282		38,661,609		36,147,009
Deposits:
Non-interest bearing	7,262,328		6,980,443
Interest bearing	24,950,251		23,515,781
Total deposits	32,212,579		30,496,224
Assets sold under agreements to repurchase	434,714		479,425
Other short-term borrowings	1,200		1,200
Notes payable	1,557,972		1,574,852
Other liabilities	862,604		911,951
Total liabilities	35,069,069		33,463,652
Stockholders' equity:
Preferred stock	50,160		50,160
Common stock	1,041		1,040
Surplus	4,261,346		4,255,022
Retained Earnings (Accumulated Deficit)	1,286,706		1,220,307
Treasury stock	(89,128)		(8,286)
Accumulated other comprehensive (loss) income, net of tax	(319,912)		(320,286)		(181,750)
Total stockholders' equity	5,190,213		5,197,957		$ 5,250,300	$ 5,105,324
Total liabilities and stockholders' equity	40,259,282		38,661,609
Elimination
Assets
Cash And Due From Banks	(34,242)		(48,081)
Money market investments	(290,209)		(267,063)
Trading account securities, at fair value	(127)		(132)
Investment securities available-for-sale, at fair value	0		0
Investment securities held-to-maturity, at amortized cost	0		0
Other investment securities, at lower of cost or realizable value	0		0
Investment in subsidiaries	(7,407,954)		(7,427,738)
Loans held-for-sale, at lower of cost or fair value	0		0
Loans held-in-portfolio:
Loans not covered under loss-sharing agreements with the FDIC	0		0
Loans covered under loss-sharing agreements with the FDIC	0		0
Less - Unearned income	0		0
Allowance for loan losses	0		0
Total loans held-in-portfolio, net	0		0
FDIC loss-share asset	0		0
Premises and equipment, net	0		0
Accrued income receivable	(62)		(90)
Mortgage servicing assets, at fair value	0		0
Other assets	(15,485)		(14,968)
Goodwill	0		0
Other intangible assets	0		0
Total assets	(7,748,079)		(7,758,072)
Deposits:
Non-interest bearing	(34,242)		(48,081)
Interest bearing	(290,209)		(267,063)
Total deposits	(324,451)		(315,144)
Assets sold under agreements to repurchase	0		0
Other short-term borrowings	0		0
Notes payable	0		0
Other liabilities	(16,072)		(15,253)
Liabilities from discontinued operations			0
Total liabilities	(340,523)		(330,397)
Stockholders' equity:
Preferred stock	0		0
Common stock	(56,309)		(56,309)
Surplus	(9,819,746)		(9,819,746)
Retained Earnings (Accumulated Deficit)	2,128,746		2,108,578
Treasury stock	(94)		(88)
Accumulated other comprehensive (loss) income, net of tax	339,847		339,890
Total stockholders' equity	(7,407,556)		(7,427,675)
Total liabilities and stockholders' equity	(7,748,079)		(7,758,072)
Non Covered Under Loss Sharing Agreements with FDIC
Loans held-in-portfolio:
Other real estate owned	185,836		180,445
Non Covered Under Loss Sharing Agreements with FDIC | Elimination
Loans held-in-portfolio:
Other real estate owned	0		0
Covered Under Loss Sharing Agreements With FDIC Member
Loans held-in-portfolio:
Loans covered under loss-sharing agreements with the FDIC	551,980	[5]	572,878	[6]
Other real estate owned	29,926		32,128
Covered Under Loss Sharing Agreements With FDIC Member | Elimination
Loans held-in-portfolio:
Other real estate owned	0		0
Popular, Inc. Holding Co.
Assets
Cash And Due From Banks	33,766		47,783
Money market investments	282,365		252,347
Trading account securities, at fair value	2,994		2,640
Investment securities available-for-sale, at fair value	0		0
Investment securities held-to-maturity, at amortized cost	0		0
Other investment securities, at lower of cost or realizable value	9,850		9,850
Investment in subsidiaries	5,581,176		5,609,611
Loans held-for-sale, at lower of cost or fair value	0		0
Loans held-in-portfolio:
Loans not covered under loss-sharing agreements with the FDIC	1,134		1,142
Loans covered under loss-sharing agreements with the FDIC	0		0
Less - Unearned income	0		0
Allowance for loan losses	1		2
Total loans held-in-portfolio, net	1,133		1,140
FDIC loss-share asset	0		0
Premises and equipment, net	2,939		3,067
Accrued income receivable	108		112
Mortgage servicing assets, at fair value	0		0
Other assets	66,531		61,770
Goodwill	0		0
Other intangible assets	553		553
Total assets	5,981,496		5,988,954
Deposits:
Non-interest bearing	0		0
Interest bearing	0		0
Total deposits	0		0
Assets sold under agreements to repurchase	0		0
Other short-term borrowings	0		0
Notes payable	736,121		735,600
Other liabilities	55,068		55,309
Liabilities from discontinued operations			0
Total liabilities	791,189		790,909
Stockholders' equity:
Preferred stock	50,160		50,160
Common stock	1,041		1,040
Surplus	4,252,819		4,246,495
Retained Earnings (Accumulated Deficit)	1,295,233		1,228,834
Treasury stock	(89,034)		(8,198)
Accumulated other comprehensive (loss) income, net of tax	(319,912)		(320,286)
Total stockholders' equity	5,190,307		5,198,045
Total liabilities and stockholders' equity	5,981,496		5,988,954
Popular, Inc. Holding Co. | Non Covered Under Loss Sharing Agreements with FDIC
Loans held-in-portfolio:
Other real estate owned	81		81
Popular, Inc. Holding Co. | Covered Under Loss Sharing Agreements With FDIC Member
Loans held-in-portfolio:
Other real estate owned	0		0
PNA Holding Co.
Assets
Cash And Due From Banks	462		591
Money market investments	8,209		13,263
Trading account securities, at fair value	0		0
Investment securities available-for-sale, at fair value	0		0
Investment securities held-to-maturity, at amortized cost	0		0
Other investment securities, at lower of cost or realizable value	4,492		4,492
Investment in subsidiaries	1,826,778		1,818,127
Loans held-for-sale, at lower of cost or fair value	0		0
Loans held-in-portfolio:
Loans not covered under loss-sharing agreements with the FDIC	0		0
Loans covered under loss-sharing agreements with the FDIC	0		0
Less - Unearned income	0		0
Allowance for loan losses	0		0
Total loans held-in-portfolio, net	0		0
FDIC loss-share asset	0		0
Premises and equipment, net	0		0
Accrued income receivable	34		138
Mortgage servicing assets, at fair value	0		0
Other assets	26,378		25,146
Goodwill	0		0
Other intangible assets	0		0
Total assets	1,866,353		1,861,757
Deposits:
Non-interest bearing	0		0
Interest bearing	0		0
Total deposits	0		0
Assets sold under agreements to repurchase	0		0
Other short-term borrowings	0		0
Notes payable	148,518		148,512
Other liabilities	2,798		6,034
Liabilities from discontinued operations			0
Total liabilities	151,316		154,546
Stockholders' equity:
Preferred stock	0		0
Common stock	2		2
Surplus	4,111,207		4,111,207
Retained Earnings (Accumulated Deficit)	(2,374,242)		(2,382,049)
Treasury stock	0		0
Accumulated other comprehensive (loss) income, net of tax	(21,930)		(21,949)
Total stockholders' equity	1,715,037		1,707,211
Total liabilities and stockholders' equity	1,866,353		1,861,757
PNA Holding Co. | Non Covered Under Loss Sharing Agreements with FDIC
Loans held-in-portfolio:
Other real estate owned	0		0
PNA Holding Co. | Covered Under Loss Sharing Agreements With FDIC Member
Loans held-in-portfolio:
Other real estate owned	0		0
All other subsidiaries and eliminations
Assets
Cash And Due From Banks	340,239		362,101
Money market investments	3,652,982		2,891,670
Trading account securities, at fair value	48,118		57,297
Investment securities available-for-sale, at fair value	9,197,527		8,209,806
Investment securities held-to-maturity, at amortized cost	96,326		98,101
Other investment securities, at lower of cost or realizable value	151,944		153,476
Investment in subsidiaries	0		0
Loans held-for-sale, at lower of cost or fair value	85,309		88,821
Loans held-in-portfolio:
Loans not covered under loss-sharing agreements with the FDIC	22,857,422		22,894,030
Loans covered under loss-sharing agreements with the FDIC	551,980		572,878
Less - Unearned income	123,835		121,425
Allowance for loan losses	544,495		540,649
Total loans held-in-portfolio, net	22,741,072		22,804,834
FDIC loss-share asset	58,793		69,334
Premises and equipment, net	546,056		540,914
Accrued income receivable	127,938		137,882
Mortgage servicing assets, at fair value	193,698		196,889
Other assets	2,034,382		2,073,562
Goodwill	627,294		627,294
Other intangible assets	42,153		44,497
Total assets	40,159,512		38,568,970
Deposits:
Non-interest bearing	7,296,570		7,028,524
Interest bearing	25,240,460		23,782,844
Total deposits	32,537,030		30,811,368
Assets sold under agreements to repurchase	434,714		479,425
Other short-term borrowings	1,200		1,200
Notes payable	673,333		690,740
Other liabilities	820,810		865,861
Liabilities from discontinued operations			0
Total liabilities	34,467,087		32,848,594
Stockholders' equity:
Preferred stock	0		0
Common stock	56,307		56,307
Surplus	5,717,066		5,717,066
Retained Earnings (Accumulated Deficit)	236,969		264,944
Treasury stock	0		0
Accumulated other comprehensive (loss) income, net of tax	(317,917)		(317,941)
Total stockholders' equity	5,692,425		5,720,376
Total liabilities and stockholders' equity	40,159,512		38,568,970
All other subsidiaries and eliminations | Non Covered Under Loss Sharing Agreements with FDIC
Loans held-in-portfolio:
Other real estate owned	185,755		180,364
All other subsidiaries and eliminations | Covered Under Loss Sharing Agreements With FDIC Member
Loans held-in-portfolio:
Other real estate owned	$ 29,926		$ 32,128

[1] Includes $4.9 billion pledged to secure public and trust deposits, assets sold under agreements to repurchase, credit facilities and loan servicing agreements that the secured parties are not permitted to sell or repledge the collateral, of which $4.2 billion serve as collateral for public funds.

[2] Includes $4.1 billion pledged to secure public and trust deposits, assets sold under agreements to repurchase, credit facilities and loan servicing agreements that the secured parties are not permitted to sell or repledge the collateral, of which $3.4 billion serve as collateral for public funds.

[3] Includes $94.3 million pledged to secure public and trust deposits that the secured parties are not permitted to sell or repledge the collateral.

[4] Includes $53.1 million pledged to secure public and trust deposits that the secured parties are not permitted to sell or repledge the collateral.

[5] Includes $325 million pledged to secure credit facilities at the FHLB which are not permitted to sell or repledge the collateral.

[6] Includes $337 million pledged to secure credit facilities at the FHLB which are not permitted to sell or repledge the collateral.