Revenue from contracts with customers - Revenue streams (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Service charges on deposit accounts
Revenue from contract with customer	$ 37,526	$ 37,781	$ 74,968	$ 72,459
BPPR
Revenue from contract with customer	114,637	112,118	224,470	216,644
BPPR | Service charges on deposit accounts
Revenue from contract with customer	35,055	35,253	70,071	67,405
BPPR | Debit card fees
Revenue from contract with customer	16,098	13,377	30,147	26,325
BPPR | Insurance fees, excluding reinsurance
Revenue from contract with customer	11,708	12,152	22,264	22,950
BPPR | Credit card fees excluding late fees and membership fees
Revenue from contract with customer	37,003	38,392	72,803	74,566
BPPR | Sale and administration of investment products
Revenue from contract with customer	7,850	6,076	15,277	12,634
BPPR | Trust fees
Revenue from contract with customer	6,923	6,868	13,908	12,764
Popular U.S.
Revenue from contract with customer	4,639	4,375	9,568	9,005
Popular U.S. | Service charges on deposit accounts
Revenue from contract with customer	2,471	2,528	4,897	5,054
Popular U.S. | Debit card fees
Revenue from contract with customer	200	223	399	441
Popular U.S. | Insurance fees, excluding reinsurance
Revenue from contract with customer	1,600	1,288	3,446	2,595
Popular U.S. | Credit card fees excluding late fees and membership fees
Revenue from contract with customer	368	336	826	915
Popular U.S. | Sale and administration of investment products
Revenue from contract with customer	0	0	0	0
Popular U.S. | Trust fees
Revenue from contract with customer	$ 0	$ 0	$ 0	$ 0