Segment reporting - Selected Balance Sheet information (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Assets	$ 67,637,917	$ 75,097,899	$ 65,926,000
Deposits	61,227,227	67,005,088
Puerto Rico
Segment Reporting Information [Line Items]
Assets	53,541,427	63,221,282	54,143,954
Loans	20,884,442	19,770,118	20,413,112
Deposits	51,138,790	57,211,608	47,586,880
Popular U.S.
Segment Reporting Information [Line Items]
Assets	12,718,775	10,986,055	10,878,030
Loans	10,643,964	8,903,493	8,396,983
Deposits	8,182,702	7,777,232	7,672,549
Other
Segment Reporting Information [Line Items]
Assets	1,377,715	890,562	904,016
Loans	554,744	626,115	674,556
Deposits	$ 1,905,735	$ 2,016,248	$ 1,606,911