Condensed Consolidating Statement of Cash Flow (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019		Mar. 31, 2018
Cash flows from operating activities:
Net Income	$ 167,925		$ 91,324
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Equity in earnings of subsidiaries, net of dividends or distributions	0		0
Provision for loan losses	41,825		71,063
Amortization of intangibles	2,312		2,325
Depreciation and amortization of premises and equipment	14,295		12,836
Net accretion of discounts and amortization of premiums and deferred fees	(38,813)		(7,006)
Share-based compensation	6,930		3,112
Impairment losses on long-lived assets	0		272
FDIC loss-share expense	0		8,027
Fair value adjustments on mortgage servicing rights	3,825		4,307
Adjustments to indemnity reserves on loans sold	93		2,926
Earnings from investments under the equity method, net of dividends or distributions	(9,027)		(7,370)
Deferred income tax (benefit) expense	45,796		10,758
Loss (gain) on:
Disposition of premises and equipment and other productive assets	(2,265)		(72)
Proceeds from insurance claims	0		(258)
Sale of loans, including valuation adjustments on loans held-for-sale and mortgage banking activities	(4,058)		(1,116)
Sale of foreclosed assets, including write-downs	(3,772)		(99)
Acquisitions of loans held-for-sale	(44,748)		(47,335)
Proceeds from sale of loans held-for-sale	13,802		12,036
Net originations on loans held-for-sale	(53,231)		(48,375)
Net decrease (increase) in:
Trading debt securities	105,838		93,998
Equity securities	(4,362)		(130)
Accrued income receivable	3,224		56,504
Other assets	28,709		36,272
Net (decrease) increase in:
Interest payable	(6,915)		(10,614)
Pension and other postretirement benefits obligation	5,297		1,225
Other liabilities	(100,585)		(94,529)
Total adjustments	4,170		98,757
Net cash (used in) provided by operating activities	172,095		190,081
Cash flows from investing activities:
Net decrease in money market investments	(643,117)		(1,728,858)
Purchases of investment securities:
Available-for-sale	(3,123,508)		(1,311,382)
Equity	(1,239)		(9,730)
Proceeds from calls, paydowns, maturities and redemptions of investment securities:
Available-for-sale	3,006,779		1,016,203
Held-to-maturity	2,587		2,639
Proceeds from sale of investment securities:
Equity	2,679		9,745
Net (disbursements) repayments on loans	(78,969)		93,482
Proceeds from sale of loans	7,806		0
Acquisition of loan portfolios	(129,875)		(161,295)
Net payments (to) from FDIC under loss sharing agreements	0		(1,263)
Return of capital from equity method investments	1,371		0
Capital Contribution Subsidiaries	0		0
Acquisition of premises and equipment	(19,438)		(13,046)
Proceeds from insurance claims	0		258
Proceeds from sale of:
Premises and equipment and other productive assets	5,975		3,033
Foreclosed assets	26,119		25,746
Net cash (used in) provided by investing activities	(942,830)		(2,074,468)
Net increase (decrease) in:
Deposits	1,169,706		1,678,029
Assets sold under agreements to repurchase	(80,659)		(10,860)
Other short-term borrowings	1		89,992
Payments of notes payable	(59,526)		(12,680)
Principal payments of finance leases	(439)		0
Proceeds from issuance of notes payable	0		40,000
Proceeds from issuance of common stock	2,976		4,712
Dividends paid to parent company	0		0
Dividends paid	(25,713)		(26,138)
Net payments for repurchase of common stock	(250,314)		(193)
Return of capital to parent company			0
Payments related to tax witholding for share-based compensation	(2,805)		(1,223)
Net cash (used in) provided by financing activities	753,227		1,761,639
Net (decrease) increase in cash and due from banks, and restricted cash	(17,508)		(122,748)
Cash and due from banks and restricted cash at beginning of period	403,251	[1]	412,629
Cash and due from banks and restricted cash at end of period	385,743		289,881
Elimination
Cash flows from operating activities:
Net Income	(184,191)		(117,155)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Equity in earnings of subsidiaries, net of dividends or distributions	(17,735)		92,496
Provision for loan losses	0		0
Amortization of intangibles	0		0
Depreciation and amortization of premises and equipment	0		0
Net accretion of discounts and amortization of premiums and deferred fees	0		0
Share-based compensation	0		0
Impairment losses on long-lived assets			0
FDIC loss-share expense	0		0
Fair value adjustments on mortgage servicing rights	0		0
Adjustments to indemnity reserves on loans sold	0		0
Earnings from investments under the equity method, net of dividends or distributions	0		0
Deferred income tax (benefit) expense	218		231
Loss (gain) on:
Disposition of premises and equipment and other productive assets	0		0
Proceeds from insurance claims			0
Sale of loans, including valuation adjustments on loans held-for-sale and mortgage banking activities	0		0
Sale of foreclosed assets, including write-downs	0		0
Acquisitions of loans held-for-sale	0		0
Proceeds from sale of loans held-for-sale	0		0
Net originations on loans held-for-sale	0		0
Net decrease (increase) in:
Trading debt securities	0		(101)
Equity securities	0		0
Accrued income receivable	(100)		34
Other assets	5,992		758
Net (decrease) increase in:
Interest payable	100		(34)
Pension and other postretirement benefits obligation	0		0
Other liabilities	(6,598)		(1,350)
Total adjustments	(18,123)		92,034
Net cash (used in) provided by operating activities	(202,314)		(25,121)
Cash flows from investing activities:
Net decrease in money market investments	(48,020)		(30,748)
Purchases of investment securities:
Available-for-sale	0		0
Equity	58		123
Proceeds from calls, paydowns, maturities and redemptions of investment securities:
Available-for-sale	0		0
Held-to-maturity	0		0
Proceeds from sale of investment securities:
Equity	0		0
Net (disbursements) repayments on loans	0		4,301
Proceeds from sale of loans	0		0
Acquisition of loan portfolios	0		0
Net payments (to) from FDIC under loss sharing agreements	0		0
Return of capital from equity method investments	0		0
Capital Contribution Subsidiaries	0		10,000
Acquisition of premises and equipment	0		0
Proceeds from insurance claims			0
Proceeds from sale of:
Premises and equipment and other productive assets	0		0
Foreclosed assets	0		0
Net cash (used in) provided by investing activities	(47,962)		(16,324)
Net increase (decrease) in:
Deposits	96,180		39,076
Assets sold under agreements to repurchase	0		0
Other short-term borrowings	0		(4,301)
Payments of notes payable	0		0
Principal payments of finance leases	0
Proceeds from issuance of notes payable			0
Proceeds from issuance of common stock	0		0
Dividends paid to parent company	202,300		25,000
Dividends paid	0		0
Net payments for repurchase of common stock	(45)		(2)
Return of capital to parent company			(10,000)
Payments related to tax witholding for share-based compensation	0		0
Net cash (used in) provided by financing activities	298,435		49,773
Net (decrease) increase in cash and due from banks, and restricted cash	48,159		8,328
Cash and due from banks and restricted cash at beginning of period	(68,022)		(48,178)
Cash and due from banks and restricted cash at end of period	(19,863)		(39,850)
Popular, Inc. Holding Co.
Cash flows from operating activities:
Net Income	167,925		91,324
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Equity in earnings of subsidiaries, net of dividends or distributions	29,880		(76,644)
Provision for loan losses	106		(21)
Amortization of intangibles	24		0
Depreciation and amortization of premises and equipment	188		187
Net accretion of discounts and amortization of premiums and deferred fees	316		521
Share-based compensation	5,369		2,361
Impairment losses on long-lived assets			0
FDIC loss-share expense	0		0
Fair value adjustments on mortgage servicing rights	0		0
Adjustments to indemnity reserves on loans sold	0		0
Earnings from investments under the equity method, net of dividends or distributions	(4,587)		(3,745)
Deferred income tax (benefit) expense	0		0
Loss (gain) on:
Disposition of premises and equipment and other productive assets	40		(5)
Proceeds from insurance claims			0
Sale of loans, including valuation adjustments on loans held-for-sale and mortgage banking activities	0		0
Sale of foreclosed assets, including write-downs	0		0
Acquisitions of loans held-for-sale	0		0
Proceeds from sale of loans held-for-sale	0		0
Net originations on loans held-for-sale	0		0
Net decrease (increase) in:
Trading debt securities	0		0
Equity securities	(2,374)		(443)
Accrued income receivable	(99)		(34)
Other assets	(1,337)		(2,287)
Net (decrease) increase in:
Interest payable	(4,594)		(7,875)
Pension and other postretirement benefits obligation	0		0
Other liabilities	(9,019)		(3,434)
Total adjustments	13,913		(91,419)
Net cash (used in) provided by operating activities	181,838		(95)
Cash flows from investing activities:
Net decrease in money market investments	45,000		29,000
Purchases of investment securities:
Available-for-sale	0		0
Equity	0		0
Proceeds from calls, paydowns, maturities and redemptions of investment securities:
Available-for-sale	0		0
Held-to-maturity	0		0
Proceeds from sale of investment securities:
Equity	0		0
Net (disbursements) repayments on loans	252		(4,168)
Proceeds from sale of loans	0		0
Acquisition of loan portfolios	0		0
Net payments (to) from FDIC under loss sharing agreements	0		0
Return of capital from equity method investments	0		0
Capital Contribution Subsidiaries	0		(10,000)
Acquisition of premises and equipment	(231)		(143)
Proceeds from insurance claims			0
Proceeds from sale of:
Premises and equipment and other productive assets	3		0
Foreclosed assets	0		0
Net cash (used in) provided by investing activities	45,024		14,689
Net increase (decrease) in:
Deposits	0		0
Assets sold under agreements to repurchase	0		0
Other short-term borrowings	0		0
Payments of notes payable	0		0
Principal payments of finance leases	0
Proceeds from issuance of notes payable			0
Proceeds from issuance of common stock	3,981		4,712
Dividends paid to parent company	0		0
Dividends paid	(25,713)		(26,138)
Net payments for repurchase of common stock	(250,271)		(191)
Return of capital to parent company			0
Payments related to tax witholding for share-based compensation	(2,805)		(1,223)
Net cash (used in) provided by financing activities	(274,808)		(22,840)
Net (decrease) increase in cash and due from banks, and restricted cash	(47,946)		(8,246)
Cash and due from banks and restricted cash at beginning of period	68,278		48,120
Cash and due from banks and restricted cash at end of period	20,332		39,874
PNA Holding Co.
Cash flows from operating activities:
Net Income	9,958		13,397
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Equity in earnings of subsidiaries, net of dividends or distributions	(12,145)		(15,852)
Provision for loan losses	0		0
Amortization of intangibles	0		0
Depreciation and amortization of premises and equipment	0		0
Net accretion of discounts and amortization of premiums and deferred fees	7		7
Share-based compensation	0		0
Impairment losses on long-lived assets			0
FDIC loss-share expense	0		0
Fair value adjustments on mortgage servicing rights	0		0
Adjustments to indemnity reserves on loans sold	0		0
Earnings from investments under the equity method, net of dividends or distributions	1,267		(751)
Deferred income tax (benefit) expense	(581)		(282)
Loss (gain) on:
Disposition of premises and equipment and other productive assets	0		0
Proceeds from insurance claims			0
Sale of loans, including valuation adjustments on loans held-for-sale and mortgage banking activities	0		0
Sale of foreclosed assets, including write-downs	0		0
Acquisitions of loans held-for-sale	0		0
Proceeds from sale of loans held-for-sale	0		0
Net originations on loans held-for-sale	0		0
Net decrease (increase) in:
Trading debt securities	0		0
Equity securities	0		0
Accrued income receivable	97		81
Other assets	26		28
Net (decrease) increase in:
Interest payable	(1,551)		(2,680)
Pension and other postretirement benefits obligation	0		0
Other liabilities	(98)		3
Total adjustments	(12,978)		(19,446)
Net cash (used in) provided by operating activities	(3,020)		(6,049)
Cash flows from investing activities:
Net decrease in money market investments	3,020		1,748
Purchases of investment securities:
Available-for-sale	0		0
Equity	0		0
Proceeds from calls, paydowns, maturities and redemptions of investment securities:
Available-for-sale	0		0
Held-to-maturity	0		0
Proceeds from sale of investment securities:
Equity	0		0
Net (disbursements) repayments on loans	0		0
Proceeds from sale of loans	0		0
Acquisition of loan portfolios	0		0
Net payments (to) from FDIC under loss sharing agreements	0		0
Return of capital from equity method investments	0		0
Capital Contribution Subsidiaries	0		0
Acquisition of premises and equipment	0		0
Proceeds from insurance claims			0
Proceeds from sale of:
Premises and equipment and other productive assets	0		0
Foreclosed assets	0		0
Net cash (used in) provided by investing activities	3,020		1,748
Net increase (decrease) in:
Deposits	0		0
Assets sold under agreements to repurchase	0		0
Other short-term borrowings	0		4,301
Payments of notes payable	0		0
Principal payments of finance leases	0
Proceeds from issuance of notes payable			0
Proceeds from issuance of common stock	0		0
Dividends paid to parent company	0		0
Dividends paid	0		0
Net payments for repurchase of common stock	0		0
Return of capital to parent company			0
Payments related to tax witholding for share-based compensation	0		0
Net cash (used in) provided by financing activities	0		4,301
Net (decrease) increase in cash and due from banks, and restricted cash	0		0
Cash and due from banks and restricted cash at beginning of period	0		462
Cash and due from banks and restricted cash at end of period	0		462
All other subsidiaries and eliminations
Cash flows from operating activities:
Net Income	174,233		103,758
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Equity in earnings of subsidiaries, net of dividends or distributions	0		0
Provision for loan losses	41,719		71,084
Amortization of intangibles	2,288		2,325
Depreciation and amortization of premises and equipment	14,107		12,649
Net accretion of discounts and amortization of premiums and deferred fees	(39,136)		(7,534)
Share-based compensation	1,561		751
Impairment losses on long-lived assets			272
FDIC loss-share expense	0		8,027
Fair value adjustments on mortgage servicing rights	3,825		4,307
Adjustments to indemnity reserves on loans sold	93		2,926
Earnings from investments under the equity method, net of dividends or distributions	(5,707)		(2,874)
Deferred income tax (benefit) expense	46,159		10,809
Loss (gain) on:
Disposition of premises and equipment and other productive assets	(2,305)		(67)
Proceeds from insurance claims			(258)
Sale of loans, including valuation adjustments on loans held-for-sale and mortgage banking activities	(4,058)		(1,116)
Sale of foreclosed assets, including write-downs	(3,772)		(99)
Acquisitions of loans held-for-sale	(44,748)		(47,335)
Proceeds from sale of loans held-for-sale	13,802		12,036
Net originations on loans held-for-sale	(53,231)		(48,375)
Net decrease (increase) in:
Trading debt securities	105,838		94,099
Equity securities	(1,988)		313
Accrued income receivable	3,326		56,423
Other assets	24,028		37,773
Net (decrease) increase in:
Interest payable	(870)		(25)
Pension and other postretirement benefits obligation	5,297		1,225
Other liabilities	(84,870)		(89,748)
Total adjustments	21,358		117,588
Net cash (used in) provided by operating activities	195,591		221,346
Cash flows from investing activities:
Net decrease in money market investments	(643,117)		(1,728,858)
Purchases of investment securities:
Available-for-sale	(3,123,508)		(1,311,382)
Equity	(1,297)		(9,853)
Proceeds from calls, paydowns, maturities and redemptions of investment securities:
Available-for-sale	3,006,779		1,016,203
Held-to-maturity	2,587		2,639
Proceeds from sale of investment securities:
Equity	2,679		9,745
Net (disbursements) repayments on loans	(79,221)		93,349
Proceeds from sale of loans	7,806		0
Acquisition of loan portfolios	(129,875)		(161,295)
Net payments (to) from FDIC under loss sharing agreements	0		(1,263)
Return of capital from equity method investments	1,371		0
Capital Contribution Subsidiaries	0		0
Acquisition of premises and equipment	(19,207)		(12,903)
Proceeds from insurance claims			258
Proceeds from sale of:
Premises and equipment and other productive assets	5,972		3,033
Foreclosed assets	26,119		25,746
Net cash (used in) provided by investing activities	(942,912)		(2,074,581)
Net increase (decrease) in:
Deposits	1,073,526		1,638,953
Assets sold under agreements to repurchase	(80,659)		(10,860)
Other short-term borrowings	1		89,992
Payments of notes payable	(59,526)		(12,680)
Principal payments of finance leases	(439)
Proceeds from issuance of notes payable			40,000
Proceeds from issuance of common stock	(1,005)		0
Dividends paid to parent company	(202,300)		(25,000)
Dividends paid	0		0
Net payments for repurchase of common stock	2		0
Return of capital to parent company			10,000
Payments related to tax witholding for share-based compensation	0		0
Net cash (used in) provided by financing activities	729,600		1,730,405
Net (decrease) increase in cash and due from banks, and restricted cash	(17,721)		(122,830)
Cash and due from banks and restricted cash at beginning of period	402,995		412,225
Cash and due from banks and restricted cash at end of period	$ 385,274		$ 289,395

[1] Refer to Note 5 - Restrictions on cash and due from banks and certain securities for nature of restrictions.