Segment reporting - Results of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Segment Reporting Information [Line Items]
Net Interest income (expense)	$ 531,668	$ 533,862	$ 1,063,324	$ 1,028,174
Provision for credit losses (benefit)	37,192	9,362	84,829	(6,138)
Non-interest Income	160,471	157,411	322,432	312,103
Amortization of intangibles	795	795	1,590	1,686
Depreciation expense	14,115	13,724	27,957	27,354
Other operating expenses	445,374	391,759	871,424	779,577
Income tax expense (benefit)	43,503	64,212	89,817	114,691
Net income (loss)	151,160	211,421	310,139	423,107
Segment assets	70,838,266	71,501,931	70,838,266	71,501,931	$ 67,637,917
Reportable Segment
Segment Reporting Information [Line Items]
Net Interest income (expense)	540,577	541,226	1,080,484	1,042,916
Provision for credit losses (benefit)	37,252	9,406	85,025	(6,303)
Non-interest Income	149,557	149,160	303,276	290,839
Amortization of intangibles	795	795	1,590	1,686
Depreciation expense	13,760	13,430	27,243	26,771
Other operating expenses	447,086	393,754	873,982	782,135
Income tax expense (benefit)	44,153	65,285	90,961	116,193
Net income (loss)	147,088	207,716	304,959	413,273
Segment assets	70,499,794	71,084,449	70,499,794	71,084,449	71,084,449
Intersegment Elimination
Segment Reporting Information [Line Items]
Net Interest income (expense)	0	1	1	2
Provision for credit losses (benefit)	0	0	0	0
Non-interest Income	(134)	(136)	(270)	(273)
Amortization of intangibles	0	0	0	0
Depreciation expense	0	0	0	0
Other operating expenses	(134)	(136)	(270)	(272)
Income tax expense (benefit)	0	0	0	0
Net income (loss)	0	1	1	1
Segment assets	(442,125)	(172,039)	(442,125)	(172,039)	(172,039)
Corporate
Segment Reporting Information [Line Items]
Net Interest income (expense)	(8,909)	(7,364)	(17,160)	(14,742)
Provision for credit losses (benefit)	(60)	(44)	(196)	165
Non-interest Income	13,012	11,567	22,726	25,832
Amortization of intangibles	0	0	0	0
Depreciation expense	355	294	714	583
Other operating expenses	(556)	(547)	(326)	(103)
Income tax expense (benefit)	(289)	(335)	(610)	(667)
Net income (loss)	4,653	4,835	5,984	11,112
Segment assets	5,844,554	5,456,518	5,844,554	5,456,518	5,456,518
Eliminations
Segment Reporting Information [Line Items]
Net Interest income (expense)	0	0	0	0
Provision for credit losses (benefit)	0	0	0	0
Non-interest Income	(2,098)	(3,316)	(3,570)	(4,568)
Amortization of intangibles	0	0	0	0
Depreciation expense	0	0	0	0
Other operating expenses	(1,156)	(1,448)	(2,232)	(2,455)
Income tax expense (benefit)	(361)	(738)	(534)	(835)
Net income (loss)	(581)	(1,130)	(804)	(1,278)
Segment assets	(5,506,082)	(5,039,036)	(5,506,082)	(5,039,036)	(5,039,036)
Banco Popular de Puerto Rico | Reportable Segment
Segment Reporting Information [Line Items]
Net Interest income (expense)	453,075	447,794	902,895	862,963
Provision for credit losses (benefit)	29,345	8,818	75,053	(4,872)
Non-interest Income	143,804	144,377	291,275	280,239
Amortization of intangibles	485	485	969	969
Depreciation expense	11,875	11,675	23,544	23,192
Other operating expenses	386,069	337,979	749,784	672,857
Income tax expense (benefit)	37,303	53,588	80,135	92,904
Net income (loss)	131,802	179,626	264,685	358,152
Segment assets	58,392,177	60,435,535	58,392,177	60,435,535	60,435,535
PB | Reportable Segment
Segment Reporting Information [Line Items]
Net Interest income (expense)	87,502	93,431	177,588	179,951
Provision for credit losses (benefit)	7,907	588	9,972	(1,431)
Non-interest Income	5,887	4,919	12,271	10,873
Amortization of intangibles	310	310	621	717
Depreciation expense	1,885	1,755	3,699	3,579
Other operating expenses	61,151	55,911	124,468	109,550
Income tax expense (benefit)	6,850	11,697	10,826	23,289
Net income (loss)	15,286	28,089	40,273	55,120
Segment assets	$ 12,549,742	$ 10,820,953	$ 12,549,742	$ 10,820,953	$ 10,820,953