Goodwill and other intangible assets - Net amount of goodwill and accumulated impairment losses by reportable segments 2 (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Goodwill
Beginning Balance			$ 804,428	$ 827,428
Goodwill on acquisition			0	0
Goodwill impairment	$ 0	$ (23,000)	0	(23,000)
Ending Balance	804,428	804,428	804,428	804,428
Banco Popular de Puerto Rico
Goodwill
Beginning Balance			436,383	436,383
Goodwill on acquisition			0	0
Goodwill impairment			0	0
Ending Balance	436,383	436,383	436,383	436,383
Popular U.S.
Goodwill
Beginning Balance			368,045	391,045
Goodwill on acquisition			0	0
Goodwill impairment			0	(23,000)
Ending Balance	$ 368,045	$ 368,045	$ 368,045	$ 368,045