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Note Trust preferred securities (Trust preferred securities - Additional Information) (Detail) - USD ($)
$ in Thousands

Dec. 31, 2018

Sep. 30, 2018

Dec. 31, 2017

Debt Disclosure

Trust Preferred Securities Subject To Phase Out Provision Of Dodd Frank Act

$ 374,000

$ 427,000

BanPonce Trust I | Popular North America Inc

Debt Disclosure

Capital securities

$ 53,000

Subordinated notes

$ 55,000

Trust Preferred Securities Subject To Mandatory Redemption | BanPonce Trust I

Debt Disclosure

Capital securities

^[1],[2],[3]

$ 52,865

[1]	Same as [5] above, except that the investment company event does not apply for early redemption.
[2]	Statutory business trust that is wholly-owned by PNA and indirectly wholly-owned by the Corporation.
[3]	The obligations of PNA under the junior subordinated debentures and its guarantees of the capital securities under the trust are fully and unconditionally guaranteed on a subordinated basis by the Corporation to the extent set forth in the applicable guarantee agreement.

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Debt Disclosure [Line Items]

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A preferred undivided beneficial interest in assets of the Issuer Trust, including the rights to receive distribution and liquidation distribution to the extent provided.

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- Definition

Amount of trust preferred securities subject to phase out provision of Dodd Frank Act.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of subordinated debt (with initial maturities beyond one year or beyond the operating cycle if longer). Subordinated debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(19))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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