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Note Trust preferred securities (Trust preferred securities - Additional Information) (Detail) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Debt Disclosure [Line Items] |  |  |
Trust Preferred Securities Subject To Phase Out Provision Of Dodd Frank Act |  | $ 374,000 | $ 427,000
Trust Preferred Securities Subject To Mandatory Redemption | BanPonce Trust I |  |  |
Debt Disclosure [Line Items] |  |  |
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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- Definition A preferred undivided beneficial interest in assets of the Issuer Trust, including the rights to receive distribution and liquidation distribution to the extent provided. + References No definition available. + Details
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- Definition Amount of trust preferred securities subject to phase out provision of Dodd Frank Act. + References No definition available. + Details
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