Commitments and Contingencies Disclosure [Line Items]

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Concentration of Risk Credit Facilities with the Puerto Rico government that is outstanding.

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The Corporations exposure to municipal loans and securities was concentrated in the municipalities of San Juan, Guaynabo, Carolina and Bayamon.

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Amount before allowance of consumer mortgage held and guaranteed by the Puerto Rico Housing Authority.

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Maximum amount of loss due to credit risk that, based on the gross fair value of the financial instrument, the entity would incur if parties to the financial instruments that make up the concentration failed completely to perform according to the terms of the contracts and the collateral or other security, if any, for the amount due proved to be of no value to the entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13537-108611

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Sum of the carrying amounts as of the balance sheet date of all investments.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.1(h))
-URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910

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Cash received from principal payments made on loans related to operating activities.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3536-108585

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Amount of valuation and qualifying accounts and reserves.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SX 210.12-09)
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690

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Commitments and contingencies - Commitments - Additional Information (Details) - USD ($) $ in Thousands		12 Months Ended
	Jul. 01, 2019	Dec. 31, 2019	Dec. 31, 2018
Commitments and Contingencies Disclosure
Reserve of potential losses associated with unfunded loan commitments		$ 35,000	$ 56,000
Outstanding concentration of risk		$ 432,000	458,000
Exposure Municipal Loans And Securities		75.00%
Commitments To Extend Credit
Commitments and Contingencies Disclosure
Reserve of potential losses associated with unfunded loan commitments		$ 9,000	8,000
Noncredit commitment
Commitments and Contingencies Disclosure
Investments		2,500
PR Government direct exposure
Commitments and Contingencies Disclosure
Outstanding concentration of risk		431,712
Total concentration of risk		431,712
Principal payments received	$ 22,000
PR Government direct exposure \| Loans
Commitments and Contingencies Disclosure
Outstanding concentration of risk		390,959	413,000
PR Government direct exposure \| Securities Investment
Commitments and Contingencies Disclosure
Outstanding concentration of risk		40,753	45,000
PR Government Indirect Exposure
Commitments and Contingencies Disclosure
Outstanding concentration of risk		350,000	368,000
Loans and Leases Receivable, Consumer, Mortgage with PRHA		276,000	293,000
PR Government Indirect Exposure \| PR Housing Bonds backed by second mortgage loans
Commitments and Contingencies Disclosure
Outstanding concentration of risk		46,000	45,000
PR Government Indirect Exposure \| Commercial real estate
Commitments and Contingencies Disclosure
Outstanding concentration of risk		21,000	23,000
PR Government Indirect Exposure \| Pass Through securities that have been economically defeased and refunded
Commitments and Contingencies Disclosure
Outstanding concentration of risk		7,000	$ 7,000
USVI Government Direct Exposure \| From USVI Government And Public Corporations
Commitments and Contingencies Disclosure
Total concentration of risk		$ 71,000