Goodwill and other intangible assets - Gross amount of goodwill and accumulated impairment losses by reportable segments (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Goodwill [Line Items]
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 [Line Items]
Goodwill gross	440,184	440,184
Accumulated impairment losses	3,801	3,801
Goodwill (net amounts)	436,383	436,383
Popular U.S.
Goodwill [Line Items]
Goodwill gross	564,456	564,456
Accumulated impairment losses	196,411	196,411
Goodwill (net amounts)	$ 368,045	$ 368,045