Segment Reporting - Additional Information (Details)	3 Months Ended
Mar. 31, 2025 USD ($) units	Mar. 31, 2024 USD ($)	Dec. 31, 2024 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	$ 757,658,000	$ 714,562,000
Assets	74,038,606,000	70,936,939,000	$ 73,045,383,000
US
Segment Reporting Information [Line Items]
Net Revenue	127,216,000	126,741,000
Assets	15,900,462,000		15,890,339,000
Other
Segment Reporting Information [Line Items]
Net Revenue	20,481,000	22,077,000
Assets	1,267,902,000		1,266,833,000
Banco Popular de Puerto Rico \| US
Segment Reporting Information [Line Items]
Net Revenue	26,300,000	29,800,000
Assets	1,400,000,000		1,600,000,000
Bank loan origination	6,000,000	0
Banco Popular de Puerto Rico \| US \| Commercial multi-family
Segment Reporting Information [Line Items]
Assets	104,000,000		104,000,000
Banco Popular de Puerto Rico \| US \| Commercial real estate loans
Segment Reporting Information [Line Items]
Assets	455,000,000		588,000,000
Banco Popular de Puerto Rico \| US \| Commercial and industrial
Segment Reporting Information [Line Items]
Assets	664,000,000		685,000,000
Banco Popular de Puerto Rico \| US \| Unsecured personal loans
Segment Reporting Information [Line Items]
Assets	90,000,000		113,000,000
Banco Popular de Puerto Rico \| Other
Segment Reporting Information [Line Items]
Net Revenue	11,800,000	$ 10,600,000
Assets	$ 1,000,000,000.0		$ 1,000,000,000.0

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