Revenue from contracts with customers - Revenue streams (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Service charges on deposit accounts
Revenue from contract with customer	$ 37,318	$ 40,006	$ 109,777	$ 122,528
BPPR
Revenue from contract with customer	109,313	104,945	325,957	315,487
BPPR | Service charges on deposit accounts
Revenue from contract with customer	34,740	37,047	102,145	114,025
BPPR | Debit card fees
Revenue from contract with customer	13,364	11,912	39,689	36,134
BPPR | Insurance fees, excluding reinsurance
Revenue from contract with customer	11,487	9,985	34,437	30,005
BPPR | Credit card fees excluding late fees and membership fees
Revenue from contract with customer	36,362	34,369	110,928	99,376
BPPR | Sale and administration of investment products
Revenue from contract with customer	6,820	5,952	19,454	17,760
BPPR | Trust fees
Revenue from contract with customer	6,540	5,680	19,304	18,187
Popular U.S.
Revenue from contract with customer	4,666	4,703	13,671	14,017
Popular U.S. | Service charges on deposit accounts
Revenue from contract with customer	2,578	2,959	7,632	8,503
Popular U.S. | Debit card fees
Revenue from contract with customer	213	221	654	660
Popular U.S. | Insurance fees, excluding reinsurance
Revenue from contract with customer	1,535	1,210	4,130	3,906
Popular U.S. | Credit card fees excluding late fees and membership fees
Revenue from contract with customer	340	313	1,255	948
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