Goodwill and other intangible assets - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Jul. 31, 2023	Sep. 30, 2022	Jul. 31, 2022
Goodwill and Intangible Assets Disclosure [Line Items]
Amortization Of Intangible Assets	$ 3,180	$ 3,275	$ 9,134
Goodwill on acquisition	0	116,135
Goodwill impairment	23,000	9,000	0
Goodwill	$ 804,428	827,428	720,293		$ 827,428
Discounted cash flow approach | Minimum
Goodwill and Intangible Assets Disclosure [Line Items]
Cost of equity discount rate	12.30%
Discounted cash flow approach | Maximum
Goodwill and Intangible Assets Disclosure [Line Items]
Cost of equity discount rate	16.96%
Banco Popular de Puerto Rico
Goodwill and Intangible Assets Disclosure [Line Items]
Fair Value Excess Over Carrying Amount				$ 3,700,000		$ 3,100,000
Percentage excess of fair value of reporting unit over equity value				468.00%		245.00%
Goodwill on acquisition	$ 0	116,135
Goodwill impairment	0	0
Goodwill	436,383	436,383	320,248		436,383
Popular U.S.
Goodwill and Intangible Assets Disclosure [Line Items]
Fair Value Excess Over Carrying Amount				$ 129,000		$ 670,000
Percentage excess of fair value of reporting unit over equity value				8.00%		41.00%
Goodwill on acquisition	0	0
Goodwill impairment	23,000	9,000
Goodwill	368,045	391,045	$ 400,045		$ 391,045
Popular U.S. | Popular Equipment Finance
Goodwill and Intangible Assets Disclosure [Line Items]
Goodwill impairment	23,000	9,000
Goodwill	$ 17,000	$ 40,000
Banco Popular de Puerto Rico and Popular Bank
Goodwill and Intangible Assets Disclosure [Line Items]
Percentage Of Goodwill				93.00%