Goodwill and other intangible assets - Net amount of goodwill and accumulated impairment losses by reportable segments 2 (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Goodwill
Beginning Balance	$ 804,428	$ 827,428
Goodwill on a disposal group	(1,474)	0
Goodwill impairment	0	(23,000)	$ (9,000)
Ending Balance	802,954	804,428	827,428
Banco Popular de Puerto Rico
Goodwill
Beginning Balance	436,383	436,383
Goodwill on a disposal group	(1,474)	0
Goodwill impairment	0	0
Ending Balance	434,909	436,383	436,383
Popular U.S.
Goodwill
Beginning Balance	368,045	391,045
Goodwill on a disposal group	0	0
Goodwill impairment	0	(23,000)
Ending Balance	$ 368,045	$ 368,045	$ 391,045