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.

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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))
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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)
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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)
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Commitments and contingencies - Commitments - Additional Information (Details) - USD ($) $ in Thousands			6 Months Ended
	Jul. 01, 2020	Jul. 01, 2019	Jun. 30, 2020	Jan. 02, 2020	Dec. 31, 2019
Commitments and Contingencies Disclosure
Exposure Municipal Loans And Securities			75.00%
Commitments To Extend Credit
Commitments and Contingencies Disclosure
Reserve of potential losses associated with unfunded loan commitments			$ 7,000		$ 9,000
Noncredit commitment
Commitments and Contingencies Disclosure
Investments			2,100		2,500
PR Government direct exposure
Commitments and Contingencies Disclosure
Outstanding concentration of risk			428,576
Total concentration of risk			428,576
Principal payments received	$ 58,000	$ 22,000
PR Government direct exposure \| Loans
Commitments and Contingencies Disclosure
Outstanding concentration of risk			390,893		391,000
PR Government direct exposure \| Securities Investment
Commitments and Contingencies Disclosure
Outstanding concentration of risk			37,683		41,000
PR Government direct exposure \| From PR Government And Public Corporations \| Securities Investment
Commitments and Contingencies Disclosure
Outstanding concentration of risk			38,000
PR Government direct exposure \| PR government and its instrumentalities and municipalities [Member]
Commitments and Contingencies Disclosure
Outstanding concentration of risk			429,000		432,000
PR Government Indirect Exposure
Commitments and Contingencies Disclosure
Outstanding concentration of risk			336,000		350,000
Loans and Leases Receivable, Consumer, Mortgage with PRHA			270,000		276,000
PR Government Indirect Exposure \| PR Housing Bonds backed by second mortgage loans
Commitments and Contingencies Disclosure
Outstanding concentration of risk			46,000		46,000
PR Government Indirect Exposure \| Commercial real estate
Commitments and Contingencies Disclosure
Outstanding concentration of risk			20,000		21,000
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			$ 69,000