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Goodwill and other intangible assets - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Sep. 30, 2023
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Jul. 31, 2024
Jul. 31, 2023
Goodwill and Intangible Assets Disclosure [Line Items]            
Amortization Of Intangible Assets   $ 2,938 $ 3,180 $ 3,275    
Goodwill impairment   0 23,000 9,000    
Goodwill   802,954 804,428 827,428    
Popular Equipment Finance            
Goodwill and Intangible Assets Disclosure [Line Items]            
Goodwill impairment $ 23,000          
Banco Popular de Puerto Rico            
Goodwill and Intangible Assets Disclosure [Line Items]            
Fair Value Excess Over Carrying Amount         $ 3,700,000 $ 3,700,000
Goodwill impairment   0 0      
Goodwill   $ 434,909 $ 436,383 $ 436,383