Revenue from contracts with customers - Revenue streams (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Service charges on deposit accounts
Revenue from contract with customer	$ 38,315	$ 37,318	$ 113,283	$ 109,777
BPPR
Revenue from contract with customer	114,876	109,313	339,346	325,957
BPPR | Service charges on deposit accounts
Revenue from contract with customer	35,699	34,740	105,770	102,145
BPPR | Debit card fees
Revenue from contract with customer	25,997	24,390	78,308	73,489
BPPR | Insurance fees, excluding reinsurance
Revenue from contract with customer	11,702	11,487	33,966	34,437
BPPR | Credit card fees excluding late fees and membership fees
Revenue from contract with customer	26,189	25,336	76,828	77,128
BPPR | Sale and administration of investment products
Revenue from contract with customer	8,387	6,820	23,664	19,454
BPPR | Trust fees
Revenue from contract with customer	6,902	6,540	20,810	19,304
Popular U.S.
Revenue from contract with customer	4,879	4,666	14,447	13,671
Popular U.S. | Service charges on deposit accounts
Revenue from contract with customer	2,616	2,578	7,513	7,632
Popular U.S. | Debit card fees
Revenue from contract with customer	200	213	599	654
Popular U.S. | Insurance fees, excluding reinsurance
Revenue from contract with customer	1,684	1,535	5,130	4,130
Popular U.S. | Credit card fees excluding late fees and membership fees
Revenue from contract with customer	379	340	1,205	1,255
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