Goodwill and other intangible assets - Gross amount of goodwill and accumulated impairment losses by reportable segments (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Goodwill
Goodwill gross	$ 1,003,166	$ 1,003,166
Accumulated impairment losses	200,212	200,212
Goodwill (net amounts)	802,954	802,954
Banco Popular de Puerto Rico
Goodwill
Goodwill gross	438,710	438,710
Accumulated impairment losses	3,801	3,801
Goodwill (net amounts)	434,909	434,909
Popular U.S.
Goodwill
Goodwill gross	564,456	564,456
Accumulated impairment losses	196,411	196,411
Goodwill (net amounts)	$ 368,045	$ 368,045