Segment reporting - Schedule of Selected Balance Sheet information (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025	Jun. 30, 2025
Segment Reporting
Total assets	$ 78,972,300	$ 75,348,267	$ 76,065,090
Deposits	70,233,115	66,190,093
Puerto Rico
Segment Reporting
Total assets	61,313,912	57,955,465
Loans	26,370,150	25,853,231
Deposits	56,416,936	52,451,498
United States
Segment Reporting
Total assets	16,255,576	16,101,705
Loans	12,949,579	12,966,468
Deposits	11,891,146	11,987,581
Other
Segment Reporting
Total assets	1,402,812	1,291,097
Loans	518,712	517,817
Deposits	$ 1,925,033	$ 1,751,014

Amount of asset recognized for present right to economic benefit.

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+ Details

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details