Segment Reporting - Additional Information (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) units	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Segment Reporting Information [Line Items]
Number Of Operating Segments | units			2
Factors Used To Identify Entitys Reportable Segments			Banco Popular de Puerto Rico and Popular U.S. Management determined the reportable segments based on the internal reporting used to evaluate performance and to assess where to allocate resources.
Net Revenue	$ 736,555,000	$ 693,569,000	$ 2,185,735,000	$ 2,079,325,000
Assets	71,323,074,000	69,736,936,000	71,323,074,000	69,736,936,000	$ 70,758,155,000
US
Segment Reporting Information [Line Items]
Net Revenue	133,067,000	131,698,000	386,819,000	389,463,000
Assets	15,883,947,000		15,883,947,000		15,343,156,000
Other
Segment Reporting Information [Line Items]
Net Revenue	20,535,000	21,886,000	63,881,000	65,899,000
Assets	1,238,213,000		1,238,213,000		1,233,699,000
Banco Popular de Puerto Rico | US
Segment Reporting Information [Line Items]
Net Revenue			91,200,000	86,000,000.0
Assets	1,600,000,000		1,600,000,000		1,500,000,000
Bank loan origination	0	$ 10,000,000	0	33,000,000
Banco Popular de Puerto Rico | US | Commercial multi-family
Segment Reporting Information [Line Items]
Assets	105,000,000		105,000,000		106,000,000
Banco Popular de Puerto Rico | US | Commercial real estate loans
Segment Reporting Information [Line Items]
Assets	521,000,000		521,000,000		528,000,000
Banco Popular de Puerto Rico | US | Commercial and industrial
Segment Reporting Information [Line Items]
Assets	747,000,000		747,000,000		557,000,000
Banco Popular de Puerto Rico | US | Unsecured personal loans
Segment Reporting Information [Line Items]
Assets	140,000,000		140,000,000		229,000,000
Banco Popular de Puerto Rico | Other
Segment Reporting Information [Line Items]
Net Revenue			32,300,000	$ 33,600,000
Assets	$ 1,000,000,000.0		$ 1,000,000,000.0		$ 1,000,000,000.0