Segment Reporting - Additional Information (Details)	3 Months Ended
	Mar. 31, 2024 USD ($) units	Mar. 31, 2023 USD ($)	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	$ 714,562,000	$ 693,617,000
Assets	70,936,939,000	67,675,759,000	$ 70,758,155,000
US
Segment Reporting Information [Line Items]
Net Revenue	126,741,000	125,045,000
Assets	15,186,839,000		15,343,156,000
Other
Segment Reporting Information [Line Items]
Net Revenue	22,077,000	20,669,000
Assets	1,242,378,000		1,233,699,000
Banco Popular de Puerto Rico | US
Segment Reporting Information [Line Items]
Net Revenue	29,800,000	25,400,000
Assets	1,500,000,000		1,500,000,000
Bank loan origination	0	23,000,000
Banco Popular de Puerto Rico | US | Commercial multi-family
Segment Reporting Information [Line Items]
Assets	106,000,000		106,000,000
Banco Popular de Puerto Rico | US | Commercial real estate loans
Segment Reporting Information [Line Items]
Assets	526,000,000		528,000,000
Banco Popular de Puerto Rico | US | Commercial and industrial
Segment Reporting Information [Line Items]
Assets	592,000,000		557,000,000
Banco Popular de Puerto Rico | US | Unsecured personal loans
Segment Reporting Information [Line Items]
Assets	198,000,000		$ 229,000,000
Banco Popular de Puerto Rico | Other
Segment Reporting Information [Line Items]
Net Revenue	$ 10,600,000	$ 11,600,000