Goodwill and other intangible assets - Gross amount of goodwill and accumulated impairment losses by reportable segments (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Goodwill
Goodwill gross	$ 1,004,640	$ 1,004,640
Accumulated impairment losses	200,212	200,212
Goodwill (net amounts)	804,428	804,428
Banco Popular de Puerto Rico
Goodwill
Goodwill gross	440,184	440,184
Accumulated impairment losses	3,801	3,801
Goodwill (net amounts)	436,383	436,383
Popular U.S.
Goodwill
Goodwill gross	564,456	564,456
Accumulated impairment losses	196,411	196,411
Goodwill (net amounts)	$ 368,045	$ 368,045